/* ================================================================
   ReadFlow – English Reading Accelerator
   Premium Dark Theme with Glassmorphism
   ================================================================ */

/* ===== RESET & VARIABLES ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* ---- Hand-Drawn palette (warm paper / pencil) ---- */
  --bg-primary: #fdfbf7;        /* warm paper */
  --bg-secondary: #fdfbf7;
  --bg-card: #ffffff;           /* clean note card */
  --bg-card-hover: #fffdf5;
  --text-primary: #2d2d2d;      /* soft pencil black (never pure black) */
  --text-secondary: #51504c;
  --text-muted: #615d54;        /* faded pencil — darkened to meet WCAG AA on paper */
  --accent: #ff4d4d;            /* red correction marker */
  --accent-dim: rgba(255, 77, 77, 0.14);
  --accent-purple: #2d5da1;     /* blue ballpoint pen */
  --accent-purple-dim: rgba(45, 93, 161, 0.14);
  --gradient: #ff4d4d;          /* solid: no glossy gradients in hand-drawn */
  --gradient-warm: #ff4d4d;
  --success: #2f8f4e;           /* green pencil */
  --success-dim: rgba(47, 143, 78, 0.14);
  --warning: #c98a00;           /* amber ink */
  --warning-dim: rgba(201, 138, 0, 0.16);
  --error: #ff4d4d;
  --error-dim: rgba(255, 77, 77, 0.14);
  --border: #2d2d2d;            /* pencil lead */
  --border-accent: #ff4d4d;
  --muted: #e5e0d8;             /* old paper / erased pencil (track fills) */
  --glass: #fffdf8;             /* opaque paper (no glassmorphism) */
  --glass-border: #2d2d2d;
  /* Hard offset shadows — no blur, cut-paper collage look */
  --shadow-sm: 2px 2px 0 0 rgba(45, 45, 45, 0.22);
  --shadow: 4px 4px 0 0 #2d2d2d;
  --shadow-lg: 8px 8px 0 0 #2d2d2d;
  --shadow-glow: 0 0 0 0 transparent;
  /* Wobbly, irregular radii — never geometric perfection */
  --radius-sm: 14px 8px 12px 10px / 10px 12px 8px 14px;
  --radius: 18px 10px 20px 12px / 12px 20px 10px 18px;
  --radius-lg: 28px 14px 24px 16px / 16px 26px 12px 28px;
  --radius-xl: 40px 18px 34px 20px / 20px 36px 16px 40px;
  --wobbly: 255px 15px 225px 15px / 15px 225px 15px 255px;   /* signature oval */
  --wobbly-md: 18px 10px 20px 12px / 12px 20px 10px 18px;
  --font: 'Patrick Hand', 'Comic Sans MS', cursive, sans-serif;
  --font-head: 'Kalam', 'Patrick Hand', cursive, sans-serif;
  --transition: 0.1s ease;      /* fast & snappy */
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
  /* Notebook-paper dot grain — kept faint so it never competes with text */
  background-image: radial-gradient(#ece7dd 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Handwritten headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: 0;
}

::selection {
  background: var(--accent);
  color: #fff;
}

a { color: var(--accent-purple); text-decoration: none; }
a:hover { text-decoration: underline; text-decoration-style: wavy; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px 4px 8px 4px;
}
::-webkit-scrollbar-thumb:hover { background: #d8d2c6; }

/* ===== TOP NAVIGATION ===== */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: 60px;
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--glass-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
}

.logo-icon {
  font-size: 1.5rem;
  filter: drop-shadow(0 0 8px rgba(0, 212, 255, 0.5));
}

.logo-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.nav-stats {
  display: flex;
  gap: 8px;
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.stat-badge .badge-icon {
  font-size: 0.9rem;
}

.stat-badge.level {
  border-color: var(--border-accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.nav-actions {
  display: flex;
  gap: 8px;
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.nav-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  border-color: var(--glass-border);
  text-decoration: none;
}

/* ===== MAIN CONTENT ===== */
.main-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 80px 24px 40px;
  min-height: 100vh;
}

.reading-workspace {
  width: min(1180px, calc(100vw - 48px));
  margin-left: 50%;
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: minmax(0, 800px) 260px;
  align-items: start;
  gap: 36px;
}

.reading-section { min-width: 0; }

.recent-words {
  position: sticky;
  top: 84px;
  padding: 22px 18px 18px;
  background: #fff9c4;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform: rotate(0.6deg);
}

.recent-words-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.recent-words-kicker {
  display: block;
  color: var(--accent);
  font: 700 0.68rem/1 ui-monospace, 'SFMono-Regular', Menlo, monospace;
  letter-spacing: 0.16em;
  margin-bottom: 5px;
}

.recent-words h2 { font-size: 1.45rem; line-height: 1.1; }
.recent-words-count {
  display: grid;
  place-items: center;
  min-width: 30px;
  height: 30px;
  padding: 0 8px;
  color: #fff;
  background: var(--accent);
  border: 2px solid var(--border);
  border-radius: 50%;
  font-size: 0.78rem;
  box-shadow: 2px 2px 0 var(--border);
}

.recent-words-hint {
  margin: 8px 0 14px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.recent-words-list { display: grid; gap: 8px; }
.recent-words-empty {
  padding: 18px 10px;
  border-top: 2px dashed rgba(45, 45, 45, 0.28);
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.55;
  text-align: center;
}

.recent-word-item {
  width: 100%;
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 8px;
  padding: 9px 7px;
  color: var(--text-primary);
  background: transparent;
  border: 0;
  border-bottom: 1px dashed rgba(45, 45, 45, 0.28);
  font-family: var(--font);
  text-align: left;
  cursor: pointer;
  transition: transform var(--transition), color var(--transition);
}

.recent-word-item:hover { color: var(--accent); transform: translateX(2px) rotate(-0.5deg); }
.recent-word-index { color: var(--text-muted); font: 0.65rem/1 ui-monospace, monospace; }
.recent-word-copy { min-width: 0; display: flex; flex-direction: column; line-height: 1.2; }
.recent-word-copy strong { overflow: hidden; font-family: var(--font-head); font-size: 1.04rem; text-overflow: ellipsis; white-space: nowrap; }
.recent-word-copy > span { overflow: hidden; margin-top: 3px; color: var(--text-muted); font-size: 0.76rem; text-overflow: ellipsis; white-space: nowrap; }
.recent-word-speak { color: var(--accent); font-size: 0.9rem; }

.hidden { display: none !important; }

/* ===== WELCOME SCREEN ===== */
.welcome-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 120px);
  text-align: center;
}

.welcome-content h1 {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  letter-spacing: -0.03em;
  animation: fadeInUp 0.8s ease;
}

.welcome-content p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  animation: fadeInUp 0.8s ease 0.15s both;
}

.welcome-content .welcome-sub {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease 0.3s both;
}

/* ===== BUTTONS ===== */
.primary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
  animation: fadeInUp 0.8s ease 0.45s both;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 212, 255, 0.35);
}

.primary-btn:active {
  transform: translateY(0);
}

.primary-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.secondary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.secondary-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ===== READING SECTION ===== */
.reading-section {
  animation: fadeIn 0.5s ease;
}

.reading-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.reading-meta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.reading-meta span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.reading-meta span:first-child {
  color: var(--accent);
  font-weight: 600;
}

/* ===== READING AREA ===== */
.reading-area {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  min-height: 200px;
  font-size: 1.25rem;
  line-height: 2.2;
  letter-spacing: 0.01em;
  word-spacing: 0.05em;
  color: var(--text-primary);
  position: relative;
  transition: var(--transition);
  box-shadow: var(--shadow);
}

.reading-area::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), transparent, rgba(139, 92, 246, 0.1));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.reading-area .placeholder-text {
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  font-size: 1rem;
}

/* Word Styling */
.word {
  cursor: pointer;
  padding: 2px 1px;
  border-radius: 4px;
  transition: all 0.15s ease;
  position: relative;
}

.word:hover {
  background: var(--accent-dim);
  color: var(--accent);
}

.word.looked-up {
  border-bottom: 2px solid rgba(0, 212, 255, 0.4);
}

.word.looked-up:hover {
  border-bottom-color: var(--accent);
}

.word.review-word {
  background: var(--accent-purple-dim);
  border-bottom: 2px dashed rgba(139, 92, 246, 0.4);
}

.word.review-word:hover {
  background: rgba(139, 92, 246, 0.25);
  color: #c4b5fd;
}

/* Reading Footer */
.reading-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  gap: 12px;
}

.reading-footer-left { flex: 1; }
.reading-footer-right { display: flex; gap: 10px; align-items: center; }

.reading-tip {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.reading-footer .primary-btn {
  animation: none;
  padding: 12px 28px;
  font-size: 0.95rem;
}

.chinese-toggle {
  padding: 10px 18px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.chinese-toggle.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

/* Chunk Token */
.word.chunk-token {
  border-bottom: 2px dashed rgba(139, 92, 246, 0.3);
  padding: 2px 3px;
  border-radius: 4px;
  cursor: pointer;
}

.word.chunk-token:hover {
  background: rgba(139, 92, 246, 0.15);
  color: #c4b5fd;
  border-bottom-color: var(--accent-purple);
}

.word.chunk-token.looked-up {
  border-bottom: 2px solid rgba(139, 92, 246, 0.5);
}

/* Chinese Reference */
.chinese-reference {
  margin-top: 16px;
  padding: 20px 24px;
  background: rgba(139, 92, 246, 0.06);
  border: 1px solid rgba(139, 92, 246, 0.15);
  border-radius: var(--radius);
  animation: fadeIn 0.3s ease;
}

.chinese-ref-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-purple);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.chinese-reference p {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--text-secondary);
}


/* ===== TOOLTIP ===== */
.tooltip {
  position: fixed;
  z-index: 200;
  min-width: 260px;
  max-width: 360px;
  background: var(--glass);
  backdrop-filter: blur(24px) saturate(1.8);
  -webkit-backdrop-filter: blur(24px) saturate(1.8);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  animation: tooltipIn 0.25s ease;
  pointer-events: auto;
}

.tooltip-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.tooltip-speak {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  font-size: 0.9rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  transition: all 0.2s ease;
  padding: 0;
}

.tooltip-speak:hover {
  background: var(--accent-dim);
  border-color: var(--accent);
  transform: scale(1.1);
}

.tooltip-speak.speaking {
  animation: speakPulse 0.6s ease;
  border-color: var(--accent);
  background: var(--accent-dim);
}

@keyframes speakPulse {
  0% { transform: scale(1); }
  30% { transform: scale(1.2); }
  100% { transform: scale(1); }
}

.tooltip-word {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.tooltip-type {
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tooltip-type.word {
  background: var(--accent-dim);
  color: var(--accent);
}

.tooltip-type.chunk {
  background: var(--accent-purple-dim);
  color: var(--accent-purple);
}

.tooltip-translation {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.tooltip-explanation {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.tooltip-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  cursor: pointer;
  border-radius: 50%;
  transition: var(--transition);
}

.tooltip-close:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.tooltip-loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tooltip-loading .mini-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(6, 8, 15, 0.85);
  backdrop-filter: blur(8px);
  gap: 16px;
}

.loading-overlay p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* ===== MODAL ===== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

.modal-content {
  position: relative;
  z-index: 1;
  width: 460px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.3s ease;
}

.modal-content h2 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: var(--font);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group small {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.form-group small.success { color: var(--success); }
.form-group small.error { color: var(--error); }

/* Provider Presets */
.provider-presets {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.preset-btn {
  flex: 1;
  padding: 10px 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.preset-btn:hover {
  border-color: var(--glass-border);
  background: var(--bg-card-hover);
}

.preset-btn.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.modal-actions {
  display: flex;
  gap: 12px;
  margin-top: 28px;
}

.modal-actions .primary-btn {
  animation: none;
  flex: 1;
}

.modal-actions .secondary-btn {
  flex: 1;
}

/* ===== DASHBOARD LAYOUT ===== */
.dashboard-content {
  max-width: 960px;
  margin: 0 auto;
  padding: 80px 24px 60px;
}

/* Hero / Level Display */
.dash-hero {
  text-align: center;
  padding: 48px 0 40px;
  animation: fadeInUp 0.6s ease;
}

.level-ring-container {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto 28px;
}

.level-ring {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  background: var(--bg-card);
  box-shadow: var(--shadow), var(--shadow-glow);
}

.level-ring::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: conic-gradient(
    var(--accent) 0%,
    var(--accent-purple) var(--progress),
    rgba(255, 255, 255, 0.05) var(--progress),
    rgba(255, 255, 255, 0.05) 100%
  );
  z-index: -1;
  animation: ringGlow 3s ease-in-out infinite alternate;
}

.level-ring::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--bg-card);
}

.level-ring-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.level-number {
  font-size: 3.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.level-name {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-top: 4px;
}

.level-cefr {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.hero-stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Upgrade Info Card */
.upgrade-info {
  margin: 20px auto 24px;
  max-width: 480px;
}

.upgrade-card {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 16px 20px;
  text-align: center;
  animation: fadeInUp 0.4s ease;
}

.upgrade-card.upgrade-maxed {
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.05);
}

.upgrade-card.upgrade-ready {
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.05);
}

.upgrade-icon {
  font-size: 1.1rem;
  margin-right: 6px;
}

.upgrade-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.upgrade-text strong {
  color: var(--accent);
  font-weight: 700;
}

.upgrade-header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  margin-bottom: 12px;
}

.upgrade-bar-container {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.upgrade-bar-bg {
  flex: 1;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.upgrade-bar-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 4px;
  transition: width 0.6s ease;
  min-width: 2px;
}

.upgrade-bar-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  min-width: 90px;
  text-align: right;
}

.upgrade-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.upgrade-hint strong {
  color: var(--warning);
}

.upgrade-target {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* ===== SECTION TITLE ===== */
.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
}

.section-title .icon {
  font-size: 1.2rem;
}

/* ===== COMPARISON GRID ===== */
.dash-section {
  margin-bottom: 40px;
  animation: fadeInUp 0.6s ease both;
}

.dash-section:nth-child(2) { animation-delay: 0.1s; }
.dash-section:nth-child(3) { animation-delay: 0.2s; }
.dash-section:nth-child(4) { animation-delay: 0.3s; }
.dash-section:nth-child(5) { animation-delay: 0.4s; }

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.comp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: var(--transition);
}

.comp-card:hover {
  border-color: var(--glass-border);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.comp-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 500;
}

.comp-today {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.comp-delta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
}

.comp-delta.positive {
  color: var(--success);
  background: var(--success-dim);
}

.comp-delta.negative {
  color: var(--error);
  background: var(--error-dim);
}

.comp-delta.neutral {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
}

/* ===== LEVEL PROGRESS BAR ===== */
.level-bar-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.level-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
}

.level-segment {
  flex: 1;
  height: 40px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  transition: all 0.4s ease;
  cursor: default;
  position: relative;
}

.level-segment.filled {
  background: var(--accent-dim);
  border-color: var(--border-accent);
  color: var(--accent);
}

.level-segment.current {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
  transform: scale(1.05);
}

.level-labels {
  display: flex;
  gap: 4px;
}

.level-label {
  flex: 1;
  text-align: center;
  font-size: 0.65rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.level-label.current {
  color: var(--accent);
  font-weight: 600;
}

/* ===== VOCABULARY TABLE ===== */
.vocab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.vocab-filters {
  display: flex;
  gap: 6px;
}

.filter-btn {
  padding: 7px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover {
  color: var(--text-secondary);
  border-color: var(--glass-border);
}

.filter-btn.active {
  background: var(--accent-dim);
  border-color: var(--border-accent);
  color: var(--accent);
}

.vocab-count {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.vocab-table {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.vocab-row {
  display: grid;
  grid-template-columns: 1.5fr 1fr 100px 100px 90px 110px;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  font-size: 0.88rem;
}

.vocab-row:last-child {
  border-bottom: none;
}

.vocab-row:hover {
  background: rgba(255, 255, 255, 0.02);
}

.vocab-row.header {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: rgba(255, 255, 255, 0.02);
}

.vocab-row.dormant-row {
  opacity: 0.5;
}

.vocab-row.dormant-row:hover {
  opacity: 0.85;
}

.vocab-content {
  font-weight: 500;
  color: var(--text-primary);
}

.vocab-type {
  display: inline-flex;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 600;
}

.vocab-type.word-type {
  background: var(--accent-dim);
  color: var(--accent);
}

.vocab-type.chunk-type {
  background: var(--accent-purple-dim);
  color: var(--accent-purple);
}

.vocab-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
}

.vocab-status.active {
  background: var(--warning-dim);
  color: var(--warning);
}

.vocab-status.mastered {
  background: var(--success-dim);
  color: var(--success);
}

.vocab-status.dormant {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
}

.vocab-actions button {
  padding: 4px 10px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
}

.vocab-actions button:hover {
  border-color: var(--error);
  color: var(--error);
}

.vocab-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* --- Blurred Chinese text --- */
.vocab-chinese-blur {
  filter: blur(5px);
  transition: filter 0.25s ease;
  cursor: default;
  user-select: none;
  color: var(--text-secondary);
  font-size: 0.82rem;
}

.vocab-chinese-cell:hover .vocab-chinese-blur {
  filter: blur(0);
}

/* --- Urgency Badges --- */
.urgency-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 0.68rem;
  font-weight: 600;
  white-space: nowrap;
}

.urgency-high {
  background: var(--error-dim);
  color: var(--error);
}

.urgency-due {
  background: var(--warning-dim);
  color: var(--warning);
}

.urgency-pre {
  background: var(--success-dim);
  color: var(--success);
}

.urgency-low {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.urgency-done {
  background: var(--success-dim);
  color: var(--success);
}

.urgency-dormant {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
}

/* --- Word Level Badge --- */
.vocab-wl {
  display: flex;
  align-items: center;
  gap: 4px;
}

.wl-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.wl-badge-active {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.wl-badge-locked {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.wl-unknown {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.vocab-rank {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* --- Stage display --- */
.vocab-stage {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* --- Mastered row --- */
.vocab-row.mastered-row {
  opacity: 0.7;
}

.vocab-row.mastered-row:hover {
  opacity: 1;
}

/* --- Relearn button --- */
.relearn-btn {
  padding: 4px 10px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--accent);
  font-size: 0.72rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.relearn-btn:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.relearn-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Delete button --- */
.delete-btn {
  padding: 4px 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.72rem;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.delete-btn:hover {
  border-color: var(--error);
  color: var(--error);
  background: var(--error-dim);
}

.delete-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --- Sort buttons --- */
.vocab-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.vocab-sort {
  display: flex;
  gap: 4px;
}

.sort-btn {
  padding: 5px 10px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
}

.sort-btn:hover {
  border-color: var(--glass-border);
}

.sort-btn.active {
  background: var(--accent-dim);
  border-color: var(--border-accent);
}

.vocab-empty {
  padding: 40px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Not ready banner */
.assessment-banner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  margin-bottom: 24px;
}

.assessment-banner p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.assessment-progress {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 12px;
}

.assessment-progress-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: 3px;
  transition: width 0.5s ease;
}

/* ===== STRUGGLING WORDS ===== */
/* ===== WORD LEVEL DISTRIBUTION (21 COCA Tiers) ===== */
.section-subtitle {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 8px;
}

.word-level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 8px;
  margin-bottom: 16px;
}

.wl-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.wl-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.wl-card.wl-activated {
  border-color: rgba(0, 212, 255, 0.2);
  background: rgba(0, 212, 255, 0.03);
}

.wl-card.wl-activated:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
}

.wl-card.wl-dormant {
  opacity: 0.55;
}

.wl-card.wl-dormant:hover {
  opacity: 0.85;
}

.wl-card.wl-has-data.wl-activated {
  border-color: rgba(0, 212, 255, 0.35);
}

.wl-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.wl-level {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
}

.wl-card.wl-dormant .wl-level {
  color: var(--text-muted);
}

.wl-status-icon {
  font-size: 0.65rem;
}

.wl-bar-bg {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  position: relative;
  margin-bottom: 6px;
  overflow: hidden;
}

.wl-bar-mastered {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--success);
  border-radius: 2px;
  transition: width 0.5s ease;
}

.wl-bar-active {
  position: absolute;
  top: 0;
  height: 100%;
  background: var(--warning);
  border-radius: 2px;
  transition: width 0.5s ease, left 0.5s ease;
}

.wl-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.wl-tracked {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.wl-range {
  font-size: 0.62rem;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Word Level Legend */
.word-level-legend {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 0;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  color: var(--text-muted);
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.legend-dot.activated {
  background: rgba(0, 212, 255, 0.5);
  border: 1px solid var(--accent);
}

.legend-dot.dormant-dot {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid var(--border);
}

.legend-dot.mastered-dot {
  background: var(--success);
}

.legend-dot.active-dot {
  background: var(--warning);
}

/* ===== STRUGGLING WORDS ===== */
.struggling-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}

.struggling-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
  transition: var(--transition);
}

.struggling-item:hover {
  border-color: var(--glass-border);
  transform: translateY(-1px);
}

.struggling-word {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.struggling-count {
  font-size: 0.75rem;
  color: var(--warning);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes tooltipIn {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes ringGlow {
  from { filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.2)); }
  to { filter: drop-shadow(0 0 25px rgba(0, 212, 255, 0.35)); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Skeleton loading */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .top-nav {
    padding: 0 16px;
    height: 56px;
  }

  .nav-stats {
    display: none;
  }

  .main-content {
    padding: 72px 16px 32px;
  }

  .reading-workspace {
    width: 100%;
    margin-left: 0;
    transform: none;
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .recent-words {
    position: static;
    transform: none;
  }

  .reading-area {
    padding: 28px 22px;
    font-size: 1.1rem;
    line-height: 2;
  }

  .welcome-content h1 {
    font-size: 2.5rem;
  }

  .hero-stats {
    gap: 20px;
    flex-wrap: wrap;
  }

  .hero-stat-value {
    font-size: 1.5rem;
  }

  .comparison-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .vocab-row {
    grid-template-columns: 1fr 0.8fr 70px 70px;
    font-size: 0.82rem;
    padding: 12px 14px;
  }

  .vocab-row .vocab-col-exposure,
  .vocab-row .vocab-col-actions,
  .vocab-row > div:nth-child(5),
  .vocab-row > div:nth-child(6),
  .vocab-row.header > div:nth-child(5),
  .vocab-row.header > div:nth-child(6) {
    display: none;
  }

  .level-segment {
    height: 32px;
    font-size: 0.65rem;
  }

  .reading-footer {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .reading-tip {
    text-align: center;
  }

  .dashboard-content {
    padding: 72px 16px 40px;
  }
}

@media (max-width: 480px) {
  .comparison-grid {
    grid-template-columns: 1fr 1fr;
  }

  .modal-content {
    padding: 24px 20px;
  }

  .struggling-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .level-ring-container {
    width: 160px;
    height: 160px;
  }

  .level-ring {
    width: 160px;
    height: 160px;
  }

  .level-number {
    font-size: 2.8rem;
  }
}

.text-accent { color: var(--accent); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-muted { color: var(--text-muted); }
.font-mono { font-family: 'JetBrains Mono', 'Fira Code', monospace; }

/* ===== CALIBRATION BAR ===== */
.calibration-bar {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 14px 24px;
  margin-bottom: 20px;
  animation: fadeInUp 0.4s ease;
}

.calibration-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.calibration-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
}

.calibration-dots {
  display: flex;
  gap: 8px;
}

.cal-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.04);
  border: 2px solid var(--border);
  color: var(--text-muted);
  transition: all 0.3s ease;
}

.cal-dot.active {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
  transform: scale(1.1);
}

.cal-dot.done {
  border-color: var(--success);
  background: var(--success-dim);
  color: var(--success);
}

.calibration-level {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

/* ===== CALIBRATION RESULT ===== */
.calibration-result {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 120px);
  animation: fadeIn 0.5s ease;
}

.cal-result-card {
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  max-width: 520px;
  width: 100%;
  box-shadow: var(--shadow), var(--shadow-glow);
}

.cal-result-card h2 {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 32px;
}

.cal-result-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 36px;
}

.cal-stat { text-align: center; }

.cal-stat-value {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}

.cal-stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.cal-result-card .primary-btn { animation: none; }

/* ===== READING WPM DISPLAY ===== */
.reading-wpm {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.reading-wpm .wpm-icon { font-size: 0.9rem; }

/* ===== CHECK-IN BADGE ===== */
.stat-badge.checkin {
  transition: all 0.3s ease;
}

.stat-badge.checkin.done {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
  animation: checkinPop 0.5s ease;
}

@keyframes checkinPop {
  0% { transform: scale(1); }
  40% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* ===== TOAST NOTIFICATION ===== */
.toast-notification {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(-120%);
  z-index: 9999;
  background: linear-gradient(135deg, rgba(16,185,129,0.9), rgba(6,148,162,0.9));
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 14px;
  padding: 16px 28px;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.6;
  box-shadow: 0 8px 32px rgba(0,0,0,0.3), 0 0 20px rgba(16,185,129,0.2);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.toast-notification.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ===== STRUCTURE TOGGLE BUTTON ===== */
.structure-toggle {
  padding: 10px 18px;
  font-size: 0.85rem;
  white-space: nowrap;
}

.structure-toggle.active {
  border-color: #f59e0b;
  background: rgba(245, 158, 11, 0.10);
  color: #f59e0b;
}

/* ===== INLINE SENTENCE STRUCTURE ===== */

/* Bracket characters */
.sv-bracket {
  font-weight: 600;
  font-size: 0.9em;
  opacity: 0.7;
  letter-spacing: 0;
}

/* Bracket colors per role */
.sv-br-subj { color: #60a5fa; }
.sv-br-pred { color: #34d399; }
.sv-br-obj  { color: #f87171; }
.sv-br-rel  { color: #c084fc; }

/* Word colors per role — override default text color, keep hover/looked-up intact */
.word.sv-word-subj { color: #93c5fd; }
.word.sv-word-pred { color: #6ee7b7; }
.word.sv-word-obj  { color: #fca5a5; }
.word.sv-word-rel  { color: #d8b4fe; }

/* Hover still works — just tint background */
.word.sv-word-subj:hover { background: rgba(96,165,250,0.15); }
.word.sv-word-pred:hover { background: rgba(52,211,153,0.15); }
.word.sv-word-obj:hover  { background: rgba(248,113,113,0.15); }
.word.sv-word-rel:hover  { background: rgba(192,132,252,0.15); }

/* ===== EDIT VOCAB BUTTON (Pencil beside estimated vocab) ===== */
.edit-vocab-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.75rem;
  padding: 2px 4px;
  border-radius: 4px;
  transition: all 0.2s ease;
  opacity: 0.5;
  vertical-align: middle;
  line-height: 1;
}

.edit-vocab-btn:hover {
  opacity: 1;
  background: var(--accent-dim);
  transform: scale(1.2);
}

/* ===== WPM COMPARISON SECTION ===== */
.wpm-overview {
  margin-bottom: 16px;
}

.wpm-overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: var(--transition);
}

.wpm-overview-card:hover {
  border-color: var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.wpm-overview-main {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
}

.wpm-overview-today {
  text-align: center;
}

.wpm-big-value {
  display: block;
  font-size: 3rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.wpm-big-label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-weight: 500;
}

.wpm-overview-arrow {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.wpm-delta-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.wpm-delta-badge.positive {
  color: var(--success);
  background: var(--success-dim);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.15);
}

.wpm-delta-badge.negative {
  color: var(--error);
  background: var(--error-dim);
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.15);
}

.wpm-delta-badge.neutral {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.05);
}

.wpm-delta-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.wpm-empty {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 0.88rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Per-level WPM grid */
.wpm-level-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.wpm-level-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  transition: var(--transition);
}

.wpm-level-card:hover {
  border-color: var(--glass-border);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.wpm-lv-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.wpm-lv-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

.wpm-lv-name {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

.wpm-lv-values {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.wpm-lv-today,
.wpm-lv-yesterday {
  text-align: center;
  flex: 1;
}

.wpm-lv-num {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.wpm-lv-num.dim {
  color: var(--text-secondary);
  opacity: 0.7;
}

.wpm-lv-sub {
  display: block;
  font-size: 0.62rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.wpm-lv-delta {
  font-size: 0.78rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 100px;
  white-space: nowrap;
}

.wpm-lv-delta.positive {
  color: var(--success);
  background: var(--success-dim);
}

.wpm-lv-delta.negative {
  color: var(--error);
  background: var(--error-dim);
}

.wpm-lv-delta.neutral {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.03);
}

/* Responsive for WPM grid */
@media (max-width: 768px) {
  .wpm-overview-main {
    flex-direction: column;
    gap: 16px;
  }

  .wpm-big-value {
    font-size: 2.5rem;
  }

  .wpm-level-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== VOCAB CHOICE GRID (Setup Screen) ===== */
.vocab-choice-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 0.8s ease 0.3s both;
}

.vocab-choice-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 28px 16px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  font-family: var(--font);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

.vocab-choice-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}

.vocab-choice-card > * { position: relative; z-index: 1; }

.vocab-choice-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.2);
}

.vocab-choice-card:hover::before {
  opacity: 0.06;
}

.vocab-choice-card.selected {
  border-color: var(--accent);
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.35), var(--shadow-glow);
}

.vocab-choice-card.selected::before {
  opacity: 0.12;
}

.vocab-choice-card.dimmed {
  opacity: 0.3;
  pointer-events: none;
  transform: scale(0.96);
}

.vc-emoji {
  font-size: 2.2rem;
  margin-bottom: 4px;
}

.vc-label {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.vc-range {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
}

.vc-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .vocab-choice-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .vocab-choice-card {
    padding: 20px 12px;
  }

  .vc-emoji { font-size: 1.8rem; }
}

/* ===== UPGRADE INFO ENHANCEMENTS ===== */
.upgrade-sub {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.02);
}

.upgrade-sub.warning {
  background: var(--warning-dim);
  color: var(--warning);
}

.upgrade-sub.safe {
  background: var(--success-dim);
  color: var(--success);
}

.upgrade-sub-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* ================================================================
   HAND-DRAWN THEME OVERRIDES
   Paper + pencil aesthetic: wobbly borders, hard offset shadows,
   handwritten type, playful rotation. Tokens live in :root; this
   layer fixes components that hardcoded dark-glass / gradient values.
   ================================================================ */

/* ---- Undo gradient-clipped text (no glossy gradients on paper) ---- */
.logo-text,
.welcome-content h1,
.level-number,
.cal-result-card h2,
.wpm-big-value {
  background: none !important;
  -webkit-background-clip: border-box !important;
  background-clip: border-box !important;
  -webkit-text-fill-color: currentColor !important;
  font-family: var(--font-head);
}
.logo-text { color: var(--accent); letter-spacing: 0; }
.welcome-content h1 { color: var(--text-primary); display: inline-block; transform: rotate(-1.5deg); }
.level-number,
.wpm-big-value { color: var(--accent); }
.cal-result-card h2 { color: var(--text-primary); }

/* Headings & section labels use the marker font */
.section-title,
.modal-content h2,
.cal-result-card h2,
.welcome-content p { font-family: var(--font-head); }

/* ---- Top navigation: a strip of paper, not glass ---- */
.top-nav {
  background: var(--glass);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 3px solid var(--border);
  box-shadow: 0 4px 0 0 rgba(45, 45, 45, 0.06);
}

.stat-badge {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 100px 18px 100px 18px / 18px 100px 18px 100px;
  color: var(--text-primary);
  box-shadow: 2px 2px 0 0 var(--border);
  font-weight: 400;
}
.stat-badge.level { background: var(--accent); color: #fff; border-color: var(--border); }
.nav-stats .stat-badge:nth-child(2) { transform: rotate(-1.5deg); }
.nav-stats .stat-badge:nth-child(3) { transform: rotate(1deg); }
.nav-stats .stat-badge:nth-child(4) { transform: rotate(-1deg); }

.nav-btn {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  box-shadow: 2px 2px 0 0 var(--border);
  transition: transform var(--transition), background var(--transition), color var(--transition), box-shadow var(--transition);
}
.nav-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--border);
  box-shadow: 1px 1px 0 0 var(--border);
  transform: translate(1px, 1px) rotate(-1deg);
}

/* ---- Buttons: wobbly ovals that press flat ---- */
.primary-btn {
  background: var(--accent);
  color: #fff;
  border: 3px solid var(--border);
  border-radius: var(--wobbly);
  box-shadow: var(--shadow);
  font-family: var(--font);
  font-weight: 400;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.primary-btn:hover {
  background: var(--accent);
  color: #fff;
  transform: translate(2px, 2px) rotate(-1deg);
  box-shadow: 2px 2px 0 0 var(--border);
}
.primary-btn:active {
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 0 var(--border);
}
.primary-btn:disabled {
  opacity: 0.5;
  transform: none;
  box-shadow: var(--shadow);
}

.secondary-btn {
  background: #fff;
  color: var(--text-primary);
  border: 3px solid var(--border);
  border-radius: var(--wobbly);
  box-shadow: var(--shadow);
  font-family: var(--font);
  font-weight: 400;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}
.secondary-btn:hover {
  background: var(--accent-purple);
  color: #fff;
  transform: translate(2px, 2px) rotate(1deg);
  box-shadow: 2px 2px 0 0 var(--border);
}
.secondary-btn:active {
  transform: translate(3px, 3px);
  box-shadow: 0 0 0 0 var(--border);
}

/* Smaller pill / chip buttons */
.preset-btn,
.filter-btn,
.sort-btn,
.vocab-actions button,
.relearn-btn,
.delete-btn {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 100px 14px 100px 14px / 14px 100px 14px 100px;
  color: var(--text-primary);
  box-shadow: 2px 2px 0 0 var(--border);
  font-family: var(--font);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}
.preset-btn:hover,
.filter-btn:hover,
.sort-btn:hover {
  background: var(--muted);
  border-color: var(--border);
  color: var(--text-primary);
  transform: translate(1px, 1px) rotate(-1deg);
  box-shadow: 1px 1px 0 0 var(--border);
}
.preset-btn.active,
.filter-btn.active,
.sort-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--border);
}
.relearn-btn:hover { background: var(--accent-purple); color: #fff; }
.vocab-actions button:hover,
.delete-btn:hover { background: var(--accent); color: #fff; border-color: var(--border); }

/* ---- Cards & containers: white notes with wobbly borders + hard shadow ---- */
.reading-area,
.modal-content,
.comp-card,
.level-bar-container,
.vocab-table,
.calibration-bar,
.cal-result-card,
.wpm-overview-card,
.wpm-level-card,
.wpm-empty,
.wl-card,
.struggling-item,
.assessment-banner,
.vocab-choice-card,
.upgrade-card,
.chinese-reference {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.reading-area { border-radius: var(--radius-lg); }
.reading-area::before { display: none; }       /* kill gradient ring */
.modal-content { border-width: 3px; box-shadow: var(--shadow-lg); border-radius: var(--radius-lg); }
.cal-result-card { border-width: 3px; box-shadow: var(--shadow-lg); border-radius: var(--radius-lg); }

/* Feature/emphasis cards get post-it yellow + a tilt */
.upgrade-card { background: #fff9c4; transform: rotate(-1deg); }
.upgrade-card.upgrade-ready { background: #e8f6ec; }
.upgrade-card.upgrade-maxed { background: #fff3d6; }
.chinese-reference { background: #eef3fb; }

/* Playful hover jiggle + shadow lift on interactive cards */
.comp-card,
.wpm-level-card,
.wl-card,
.struggling-item,
.vocab-choice-card {
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}
.comp-card:hover,
.wpm-level-card:hover,
.wl-card:hover,
.struggling-item:hover {
  transform: rotate(-1deg) translateY(-2px);
  box-shadow: 6px 6px 0 0 var(--border);
  border-color: var(--border);
}
.vocab-choice-card { border-width: 3px; }
.vocab-choice-card::before { display: none; }
.vocab-choice-card:hover {
  border-color: var(--border);
  transform: rotate(-1deg) translateY(-3px);
  box-shadow: 6px 6px 0 0 var(--accent);
}
.vocab-choice-card.selected {
  border-color: var(--border);
  background: #fff9c4;
  transform: rotate(-1deg) scale(1.03);
  box-shadow: 6px 6px 0 0 var(--accent);
}
.vc-range { color: var(--accent); }

/* ---- Inputs: full wobbly boxes ---- */
.form-group input,
.form-group select {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 1rem;
}
.form-group input::placeholder { color: rgba(45, 45, 45, 0.4); }
.form-group input:focus,
.form-group select:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px var(--accent-purple-dim);
}
.form-group label { color: var(--text-secondary); font-weight: 400; }

/* ---- Tooltip: a little paper note ---- */
.tooltip {
  background: var(--glass);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: 3px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.tooltip-word { color: var(--accent); font-family: var(--font-head); }
.tooltip-type { border: 2px solid var(--border); }
.tooltip-type.word { background: var(--accent-dim); color: var(--accent); }
.tooltip-type.chunk { background: var(--accent-purple-dim); color: var(--accent-purple); }
.tooltip-speak {
  border: 2px solid var(--border);
  background: #fff;
}
.tooltip-speak:hover { background: var(--accent); transform: rotate(-6deg) scale(1.1); }
.tooltip-close:hover { background: var(--muted); color: var(--text-primary); }

/* ---- Overlays: lift the page, don't black it out ---- */
.modal-overlay { background: rgba(45, 45, 45, 0.35); backdrop-filter: blur(2px); }
.loading-overlay { background: rgba(253, 251, 247, 0.88); backdrop-filter: none; }
.loading-overlay p { color: var(--text-secondary); }
.loading-spinner { border-color: var(--muted); border-top-color: var(--accent); }
.tooltip-loading .mini-spinner { border-color: var(--muted); border-top-color: var(--accent); }

/* ---- Reading words: pencil underlines, marker highlights ---- */
.word:hover { background: var(--accent-dim); color: var(--accent); border-radius: 6px 3px 6px 3px; }
.word.looked-up { border-bottom: 2px solid var(--accent); }
.word.review-word { background: var(--accent-purple-dim); border-bottom: 2px dashed var(--accent-purple); }
.word.review-word:hover { background: rgba(45, 93, 161, 0.2); color: var(--accent-purple); }
.word.chunk-token { border-bottom: 2px dashed var(--accent-purple); }
.word.chunk-token:hover { background: var(--accent-purple-dim); color: var(--accent-purple); border-bottom-color: var(--accent-purple); }
.word.chunk-token.looked-up { border-bottom: 2px solid var(--accent-purple); }

/* ---- Tracks / progress bars: erased-pencil fills with an outline ---- */
.upgrade-bar-bg,
.assessment-progress,
.wl-bar-bg {
  background: var(--muted);
  border: 1px solid var(--border);
}
.upgrade-bar-fill,
.assessment-progress-fill { background: var(--accent); }

/* ---- Level segments: paper tiles, current one is marker-red ---- */
.level-segment {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 10px 6px 10px 6px / 6px 10px 6px 10px;
  color: var(--text-muted);
}
.level-segment.filled { background: var(--accent-dim); border-color: var(--border); color: var(--accent); }
.level-segment.current {
  background: var(--accent);
  border-color: var(--border);
  color: #fff;
  box-shadow: 2px 2px 0 0 var(--border);
  transform: scale(1.05) rotate(-2deg);
}

/* ---- Level ring: red→blue pencil arc, no neon glow ---- */
.level-ring { background: #fff; box-shadow: var(--shadow); border: 2px solid var(--border); }
.level-ring::before {
  background: conic-gradient(
    var(--accent) 0%,
    var(--accent-purple) var(--progress),
    var(--muted) var(--progress),
    var(--muted) 100%
  );
  animation: none;
}
.level-ring::after { background: #fff; }

/* ---- Calibration dots ---- */
.cal-dot {
  background: #fff;
  border: 2px solid var(--border);
  color: var(--text-muted);
}
.cal-dot.active { background: var(--accent); border-color: var(--border); color: #fff; box-shadow: 2px 2px 0 0 var(--border); transform: scale(1.1) rotate(-4deg); }
.cal-dot.done { background: var(--success-dim); border-color: var(--success); color: var(--success); }
.cal-stat-value { color: var(--accent); font-family: var(--font-head); }

/* ---- Misc near-invisible white-on-white fills → muted ---- */
.comp-delta.neutral,
.wpm-delta-badge.neutral,
.wpm-lv-delta.neutral,
.urgency-low,
.urgency-dormant,
.vocab-status.dormant,
.wl-badge-locked,
.wl-unknown,
.upgrade-sub {
  background: var(--muted);
  color: var(--text-muted);
}
.wl-badge-locked, .wl-unknown { border: 1px solid var(--border); }
.vocab-row.header { background: var(--muted); color: var(--text-secondary); }
.vocab-row:hover { background: #fffdf0; }
.legend-dot.activated { background: var(--accent); border: 1px solid var(--border); }
.legend-dot.dormant-dot { background: var(--muted); border: 1px solid var(--border); }
.wl-badge-active { background: var(--accent-dim); color: var(--accent); border: 1px solid var(--accent); }

/* ---- WPM pill in reading header ---- */
.reading-wpm {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 100px 16px 100px 16px / 16px 100px 16px 100px;
  color: var(--text-primary);
  box-shadow: 2px 2px 0 0 var(--border);
}
.reading-meta span:first-child { color: var(--accent); }

/* ---- Toggles in reading footer ---- */
.chinese-toggle.active { border-color: var(--accent-purple); background: var(--accent-purple-dim); color: var(--accent-purple); }
.structure-toggle.active { border-color: var(--warning); background: var(--warning-dim); color: var(--warning); }

/* ---- Toast: a torn paper note ---- */
.toast-notification {
  background: var(--accent);
  backdrop-filter: none;
  border: 3px solid var(--border);
  border-radius: var(--wobbly-md);
  box-shadow: var(--shadow);
  color: #fff;
}

/* ---- Sentence-structure role colors tuned for paper (ink tones) ---- */
.sv-br-subj, .word.sv-word-subj { color: var(--accent-purple); }
.sv-br-pred, .word.sv-word-pred { color: var(--success); }
.sv-br-obj,  .word.sv-word-obj  { color: var(--accent); }
.sv-br-rel,  .word.sv-word-rel  { color: #7a3da1; }
.word.sv-word-subj:hover { background: rgba(45, 93, 161, 0.15); }
.word.sv-word-pred:hover { background: rgba(47, 143, 78, 0.15); }
.word.sv-word-obj:hover  { background: rgba(255, 77, 77, 0.15); }
.word.sv-word-rel:hover  { background: rgba(122, 61, 161, 0.15); }

/* ---- Check-in streak badge when done ---- */
.stat-badge.checkin.done { background: var(--success-dim); border-color: var(--success); color: var(--success); }

/* ---- Numbers/ranks: monospace for fast scanning (not handwritten) ---- */
.font-mono,
.vocab-rank,
.vocab-stage,
.wl-range { font-family: ui-monospace, 'SFMono-Regular', 'JetBrains Mono', Menlo, Consolas, monospace; letter-spacing: 0; }

/* ---- Skeleton shimmer on paper ---- */
.skeleton { background: linear-gradient(90deg, var(--muted) 25%, #f2eee6 50%, var(--muted) 75%); background-size: 200% 100%; }

/* ---- Welcome heading: enter once, then hold its tilt (no looping jitter) ---- */
.welcome-content h1 { animation: fadeInUp 0.8s ease both; }

/* ================================================================
   READABILITY TUNING (Plan B — handwritten, but easy on the eyes)
   ================================================================ */
/* Main reading surface: larger type, airier leading & tracking so the
   handwritten letterforms stay comfortable over long passages. */
.reading-area {
  font-size: 1.4rem;
  line-height: 2.35;
  letter-spacing: 0.015em;
  word-spacing: 0.06em;
}
.reading-area .placeholder-text { font-size: 1.15rem; }
/* Chinese reference & tooltip glosses: bump size + contrast */
.chinese-reference p { font-size: 1.15rem; line-height: 2; color: var(--text-primary); }
.tooltip-translation { font-size: 1.2rem; color: var(--text-primary); }
.tooltip-explanation { font-size: 1rem; color: var(--text-secondary); line-height: 1.7; }
/* Keep the larger reading size on mobile too (just a touch smaller) */
@media (max-width: 768px) {
  .reading-area { font-size: 1.22rem; line-height: 2.2; }
}

/* ================================================================
   DASHBOARD TWO-COLUMN LAYOUT
   Compact desktop overview; vocabulary remains full-width below.
   ================================================================ */
.dashboard-content {
  width: min(1440px, 100%);
  max-width: none;
  padding: 84px 28px 56px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(430px, 1.12fr);
  align-items: start;
  gap: 28px;
}

.dashboard-column { min-width: 0; }
.dashboard-column .dash-section { margin-bottom: 24px; }
.dashboard-column .dash-section:last-child { margin-bottom: 0; }

.dashboard-primary .dash-hero {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  grid-template-areas:
    "ring upgrade"
    "stats stats";
  align-items: center;
  gap: 14px 16px;
  padding: 18px;
  margin-bottom: 24px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: left;
}

.dashboard-primary .level-ring-container {
  grid-area: ring;
  width: 124px;
  height: 124px;
  margin: 0;
}

.dashboard-primary .level-ring {
  width: 124px;
  height: 124px;
}

.dashboard-primary .level-number { font-size: 2.3rem; }
.dashboard-primary .upgrade-info {
  grid-area: upgrade;
  width: 100%;
  max-width: none;
  margin: 0;
}

.dashboard-primary .upgrade-card {
  padding: 12px 14px;
  text-align: left;
  box-shadow: 2px 2px 0 0 var(--border);
}

.dashboard-primary .upgrade-card + .upgrade-card { margin-top: 8px; }
.dashboard-primary .upgrade-header { justify-content: flex-start; margin-bottom: 8px; }
.dashboard-primary .hero-stats {
  grid-area: stats;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding-top: 16px;
  border-top: 2px dashed rgba(45, 45, 45, 0.22);
}

.dashboard-primary .hero-stat {
  min-width: 0;
  padding: 7px 4px;
  text-align: center;
}

.dashboard-primary .hero-stat-value {
  font-size: 1.35rem;
  line-height: 1.15;
  white-space: nowrap;
}

.manual-level-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 18px;
}

.manual-level-metric { display: grid; gap: 3px; }
.manual-level-label, .manual-level-count, .manual-level-status { color: var(--text-muted); font-size: 0.78rem; }
.manual-level-wpm { color: var(--accent); font-size: 1.35rem; }
.manual-level-controls { display: flex; align-items: center; gap: 10px; }
.manual-level-current { min-width: 62px; font-weight: 800; text-align: center; }
.manual-level-btn {
  width: 36px;
  height: 36px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: #fff;
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 800;
  cursor: pointer;
}
.manual-level-btn:hover:not(:disabled) { background: var(--accent); color: #fff; }
.manual-level-btn:disabled { cursor: not-allowed; opacity: 0.35; }
.manual-level-status { flex-basis: 100%; }
.median-history { display: grid; grid-template-columns: repeat(5, minmax(72px, 1fr)); gap: 6px; margin-top: 8px; }
.median-window { display: grid; gap: 2px; padding: 7px 8px; border: 1px solid var(--border); border-radius: 9px; background: #fff; }
.median-window span, .median-window small { color: var(--text-muted); font-size: .6rem; }
.median-window strong { color: var(--text-primary); font-size: .92rem; }
.median-window.empty { color: var(--text-muted); font-size: .7rem; }

.master-btn {
  color: var(--success) !important;
  border-color: var(--success) !important;
}
.master-btn:hover:not(:disabled) {
  background: var(--success) !important;
  color: #fff !important;
}
.master-btn:disabled { cursor: wait; opacity: 0.55; }

.complete-review-btn {
  color: var(--success) !important;
  border-color: var(--success) !important;
}
.complete-review-btn:hover:not(:disabled) {
  background: var(--success) !important;
  color: #fff !important;
}
.complete-review-btn:disabled { cursor: wait; opacity: 0.55; }

.daily-progress-card {
  padding: 20px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.calendar-header { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.calendar-month { color: var(--text-muted); font-size: 0.82rem; }
.calendar-nav { display: flex; gap: 6px; }
.calendar-nav button {
  min-width: 34px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
  color: var(--text-primary);
  cursor: pointer;
}
.calendar-nav button:hover { color: #fff; background: var(--accent); }
.calendar-weekdays, .calendar-days { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; }
.calendar-weekdays { margin: 16px 0 6px; color: var(--text-muted); font-size: 0.7rem; text-align: center; }
.calendar-day {
  position: relative;
  min-height: 48px;
  padding: 6px 3px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: #f7f7fa;
  color: var(--text-primary);
  cursor: pointer;
}
.calendar-day > span { display: block; font-weight: 700; }
.calendar-day small { display: block; margin-top: 2px; color: var(--text-muted); font-size: 0.58rem; }
.calendar-day.empty { background: transparent; }
.calendar-day.today { border-color: var(--accent); }
.calendar-day.checked-in::after { content: ''; position: absolute; top: 5px; right: 5px; width: 6px; height: 6px; border-radius: 50%; background: var(--success); }
.calendar-day.selected { color: #fff; background: var(--accent); }
.calendar-day.selected small { color: rgba(255,255,255,.8); }
.calendar-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--border); }
.calendar-summary div { display: grid; gap: 2px; text-align: center; }
.calendar-summary strong { color: var(--accent); font-size: 1.35rem; }
.calendar-summary span { color: var(--text-muted); font-size: 0.68rem; }
.daily-accumulation { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.daily-accumulation-title { margin-bottom: 10px; font-weight: 850; }

.growth-panel {
  margin: 0 0 28px;
  padding: 22px;
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  background: #fff;
  box-shadow: var(--shadow);
}
.growth-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.growth-heading .section-title { margin-bottom: 4px; }
.growth-heading p, .growth-footnote, .growth-note { margin: 0; color: var(--text-muted); font-size: .76rem; line-height: 1.55; }
.growth-verdict { flex: 0 0 auto; padding: 8px 12px; border-radius: 999px; background: rgba(118,118,128,.1); color: var(--text-muted); font-size: .78rem; font-weight: 800; }
.growth-verdict.good { color: var(--success); background: rgba(52,199,89,.12); }
.growth-verdict.stable { color: var(--accent); background: var(--accent-dim); }
.growth-verdict.warning { color: #a15c00; background: rgba(255,159,10,.14); }
.growth-grid { display: grid; grid-template-columns: 1fr; gap: 12px; }
.growth-card { min-width: 0; padding: 16px; border: 1px solid var(--border); border-radius: 14px; background: #f8f8fb; }
.growth-card-title { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 13px; }
.growth-card-title > span { font-weight: 850; }
.growth-card-title small { color: var(--text-muted); font-size: .65rem; text-align: right; }
.growth-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; }
.growth-metric { display: grid; gap: 3px; min-width: 0; }
.growth-metric strong { color: var(--text-primary); font-size: 1.12rem; line-height: 1.2; }
.growth-metric span { color: var(--text-muted); font-size: .64rem; }
.growth-note { margin-top: 13px; padding-top: 11px; border-top: 1px dashed var(--border); }
.fluency-comparison { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 8px; }
.fluency-comparison > div:not(.fluency-arrow) { display: grid; gap: 2px; }
.fluency-comparison span, .fluency-comparison small { color: var(--text-muted); font-size: .65rem; }
.fluency-comparison strong { font-size: 1.65rem; line-height: 1.1; }
.fluency-comparison > div:last-child strong { color: var(--accent); }
.fluency-arrow { color: var(--text-muted); font-size: 1.1rem; }
.fluency-deltas { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.fluency-deltas span { padding: 4px 8px; border-radius: 999px; background: #fff; color: var(--text-secondary); font-size: .68rem; }
.growth-sample-warning { margin-top: 10px; color: #a15c00; font-size: .68rem; line-height: 1.4; }
.growth-footnote { margin-top: 15px; padding-top: 12px; border-top: 1px solid var(--border); }

@media (max-width: 1050px) {
  .growth-grid { grid-template-columns: 1fr 1fr; }
  .growth-vocab { grid-column: 1 / -1; }
}

@media (max-width: 700px) {
  .growth-panel { padding: 16px; }
  .growth-heading { display: grid; }
  .growth-verdict { justify-self: start; }
  .growth-grid { grid-template-columns: 1fr; }
  .growth-vocab { grid-column: auto; }
}

.example-btn { color: var(--accent-purple) !important; border-color: var(--accent-purple) !important; }
.example-btn:hover:not(:disabled) { color: #fff !important; background: var(--accent-purple) !important; }
.example-btn:disabled { cursor: wait; opacity: .55; }
.word-example-modal[hidden] { display: none; }
.word-example-modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 24px; }
.word-example-backdrop { position: absolute; inset: 0; background: rgba(28, 28, 30, .48); backdrop-filter: blur(5px); }
.word-example-dialog {
  position: relative;
  width: min(680px, 100%);
  max-height: min(760px, 88vh);
  overflow-y: auto;
  padding: 26px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: #fff;
  box-shadow: var(--shadow-lg);
}
.word-example-close { position: absolute; top: 14px; right: 16px; width: 34px; height: 34px; border: 0; border-radius: 50%; background: #f2f2f7; color: var(--text-primary); font-size: 1.45rem; cursor: pointer; }
.word-example-kicker { color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.word-example-dialog h2 { margin: 5px 42px 18px 0; font-size: 2rem; }
.word-example-section { padding: 16px 0; border-top: 1px solid var(--border); }
.word-example-section h3 { margin: 0 0 10px; font-size: .9rem; }
.meaning-item, .example-item, .collocation-item { display: grid; gap: 4px; padding: 10px 12px; margin-top: 7px; border-radius: 10px; background: #f7f7fa; }
.meaning-item { grid-template-columns: 70px 1fr; align-items: center; }
.meaning-item > span { color: var(--accent); font-size: .72rem; }
.example-item > span, .collocation-item > span, .collocation-item > small { color: var(--text-muted); }
.collocation-item > small { font-size: .72rem; }
.word-example-loading, .word-example-error { padding: 34px 10px; color: var(--text-muted); text-align: center; }
.word-example-error { color: var(--error); }

.dashboard-primary .hero-stat-label { font-size: 0.72rem; }
.dashboard-column .section-title {
  margin-bottom: 12px;
  font-size: 1rem;
}

.dashboard-primary .level-bar-container { padding: 17px 15px 13px; }
.dashboard-primary .level-segment { height: 34px; font-size: 0.68rem; }
.dashboard-primary .level-label { font-size: 0.58rem; }

.dashboard-insights .wpm-overview { margin-bottom: 10px; }
.dashboard-insights .wpm-overview-card { padding: 14px 20px; }
.dashboard-insights .wpm-overview-main { gap: 28px; }
.dashboard-insights .wpm-big-value { font-size: 2.35rem; }
.dashboard-insights .wpm-level-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.dashboard-insights .wpm-level-card { padding: 10px 12px; }
.dashboard-insights .wpm-lv-header { margin-bottom: 6px; }
.dashboard-insights .wpm-lv-num { font-size: 1.16rem; }
.dashboard-insights .comparison-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.dashboard-insights .comp-card { padding: 12px 14px; }
.dashboard-insights .comp-label { margin-bottom: 3px; font-size: 0.74rem; }
.dashboard-insights .comp-today { font-size: 1.45rem; }
.dashboard-insights .comp-delta { margin-top: 5px; padding: 2px 7px; font-size: 0.68rem; }
.dashboard-insights .struggling-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.dashboard-insights .struggling-item { min-width: 0; padding: 9px 10px; }
.dashboard-insights .struggling-word {
  overflow: hidden;
  font-size: 0.9rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.dashboard-insights .struggling-count { font-size: 0.66rem; }

.dashboard-vocabulary {
  margin-top: 8px;
  padding-top: 24px;
  border-top: 2px dashed rgba(45, 45, 45, 0.24);
}

.dashboard-vocabulary .vocab-row {
  grid-template-columns: minmax(180px, 1.5fr) minmax(140px, 1fr) 120px 120px 110px 210px;
}

@media (max-width: 980px) {
  .dashboard-grid { grid-template-columns: 1fr; }
  .dashboard-primary .dash-hero { grid-template-columns: 132px minmax(0, 1fr); }
  .dashboard-insights .struggling-grid { grid-template-columns: repeat(5, minmax(100px, 1fr)); }
}

@media (max-width: 768px) {
  .dashboard-content { padding: 72px 16px 40px; }
  .dashboard-grid { gap: 0; }
  .dashboard-primary .dash-hero {
    display: flex;
    flex-direction: column;
    padding: 22px 16px;
    text-align: center;
  }
  .dashboard-primary .upgrade-header { justify-content: center; }
  .dashboard-primary .hero-stats { width: 100%; grid-template-columns: repeat(2, 1fr); }
  .dashboard-primary .hero-stat:first-child { grid-column: 1 / -1; }
  .dashboard-insights .comparison-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-insights .struggling-grid { grid-template-columns: repeat(2, 1fr); }
  .dashboard-vocabulary { margin-top: 0; }
}

/* ================================================================
   iOS-INSPIRED SYSTEM THEME
   Restrained surfaces, system typography and subtle depth.
   ================================================================ */
:root {
  --bg-primary: #f2f2f7;
  --bg-secondary: #f2f2f7;
  --bg-card: #ffffff;
  --bg-card-hover: #f9f9fb;
  --text-primary: #1c1c1e;
  --text-secondary: #48484a;
  --text-muted: #8e8e93;
  --accent: #007aff;
  --accent-dim: rgba(0, 122, 255, 0.1);
  --accent-purple: #5856d6;
  --accent-purple-dim: rgba(88, 86, 214, 0.1);
  --gradient: #007aff;
  --gradient-warm: #007aff;
  --success: #34c759;
  --success-dim: rgba(52, 199, 89, 0.12);
  --warning: #ff9500;
  --warning-dim: rgba(255, 149, 0, 0.12);
  --error: #ff3b30;
  --error-dim: rgba(255, 59, 48, 0.1);
  --border: rgba(60, 60, 67, 0.16);
  --border-accent: rgba(0, 122, 255, 0.28);
  --muted: #e5e5ea;
  --glass: rgba(255, 255, 255, 0.86);
  --glass-border: rgba(60, 60, 67, 0.18);
  --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 38px rgba(0, 0, 0, 0.12);
  --shadow-glow: none;
  --radius-sm: 10px;
  --radius: 14px;
  --radius-lg: 18px;
  --radius-xl: 22px;
  --wobbly: 12px;
  --wobbly-md: 12px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", "Segoe UI", sans-serif;
  --font-head: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", "Segoe UI", sans-serif;
  --transition: 0.18s ease;
}

html { background: var(--bg-primary); }
body {
  background: var(--bg-primary);
  background-image: none;
  font-family: var(--font);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6,
button, input, select, textarea { font-family: var(--font); }
h1, h2, h3, h4, h5, h6 { letter-spacing: -0.02em; }
::selection { background: rgba(0,122,255,.2); color: var(--text-primary); }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(60,60,67,.24); border: 2px solid transparent; background-clip: padding-box; border-radius: 8px; }

.top-nav {
  height: 64px;
  padding: 0 24px;
  background: rgba(255,255,255,.82);
  border-bottom: .5px solid var(--border);
  box-shadow: none;
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.logo-icon { font-size: 1.25rem; filter: none; }
.logo-text { color: var(--text-primary); font-family: var(--font); font-weight: 650; letter-spacing: -.02em; }
.stat-badge, .stat-badge.level {
  padding: 6px 11px;
  background: rgba(118,118,128,.1);
  border: 0;
  border-radius: 999px;
  box-shadow: none;
  color: var(--text-secondary);
  font-weight: 500;
  transform: none !important;
}
.stat-badge.level { background: var(--accent-dim); color: var(--accent); }
.nav-btn {
  padding: 8px 13px;
  background: rgba(118,118,128,.1);
  border: 0;
  border-radius: 10px;
  box-shadow: none;
  color: var(--accent);
  font-weight: 500;
}
.nav-btn:hover { background: rgba(118,118,128,.18); color: var(--accent); transform: none; box-shadow: none; }

.primary-btn, .secondary-btn {
  min-height: 44px;
  padding: 11px 22px;
  border: 0;
  border-radius: 12px;
  box-shadow: none;
  font-family: var(--font);
  font-weight: 600;
  transform: none;
}
.primary-btn { background: var(--accent); color: #fff; }
.primary-btn:hover { background: #006ee6; color: #fff; transform: none; box-shadow: none; }
.primary-btn:active { transform: scale(.98); }
.secondary-btn { background: rgba(118,118,128,.12); color: var(--text-primary); }
.secondary-btn:hover { background: rgba(118,118,128,.2); color: var(--text-primary); transform: none; box-shadow: none; }

.reading-area, .modal-content, .comp-card, .level-bar-container, .vocab-table,
.calibration-bar, .cal-result-card, .wpm-overview-card, .wpm-level-card,
.wpm-empty, .wl-card, .struggling-item, .assessment-banner, .vocab-choice-card,
.upgrade-card, .chinese-reference, .dashboard-primary .dash-hero, .recent-words {
  background: #fff;
  border: 1px solid rgba(60,60,67,.12);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transform: none;
}
.reading-area { border-radius: 18px; box-shadow: var(--shadow); }
.reading-area::before { display: none; }
.modal-content, .cal-result-card { border-width: 1px; border-radius: 18px; box-shadow: var(--shadow-lg); }
.upgrade-card, .upgrade-card.upgrade-ready, .upgrade-card.upgrade-maxed,
.chinese-reference, .recent-words { background: #fff; }
.comp-card:hover, .wpm-level-card:hover, .wl-card:hover, .struggling-item:hover,
.vocab-choice-card:hover { border-color: rgba(60,60,67,.18); box-shadow: var(--shadow); transform: translateY(-1px); }
.vocab-choice-card.selected { background: var(--accent-dim); border-color: var(--accent); box-shadow: none; transform: none; }

.welcome-content h1 { color: var(--text-primary); font-family: var(--font); font-size: 3.25rem; transform: none; animation: fadeInUp .45s ease both; }
.welcome-content p { font-family: var(--font); }
.reading-area { font-family: var(--font); font-size: 1.22rem; line-height: 2.05; letter-spacing: .002em; word-spacing: .03em; }
.word:hover { background: var(--accent-dim); color: var(--accent); border-radius: 5px; }
.word.looked-up { border-bottom: 2px solid var(--accent); }
.word.review-word, .word.chunk-token { background: var(--accent-purple-dim); border-bottom-color: var(--accent-purple); }
.word.review-word:hover, .word.chunk-token:hover { background: rgba(88,86,214,.16); color: var(--accent-purple); }

.tooltip { background: rgba(255,255,255,.94); border: .5px solid var(--border); border-radius: 14px; box-shadow: var(--shadow-lg); backdrop-filter: blur(20px); }
.tooltip-word { color: var(--text-primary); font-family: var(--font); }
.tooltip-type, .tooltip-speak { border: 0; }
.tooltip-speak { background: rgba(118,118,128,.1); }
.tooltip-speak:hover { background: rgba(118,118,128,.18); transform: none; }
.tooltip-type.word { background: var(--accent-dim); color: var(--accent); }
.tooltip-type.chunk { background: var(--accent-purple-dim); color: var(--accent-purple); }
.modal-overlay { background: rgba(0,0,0,.22); backdrop-filter: blur(8px); }
.loading-overlay { background: rgba(242,242,247,.88); backdrop-filter: blur(10px); }

.recent-words { padding: 20px 16px; }
.recent-words-kicker { color: var(--text-muted); font-family: var(--font); font-weight: 600; letter-spacing: .08em; }
.recent-words-count { background: var(--accent); border: 0; box-shadow: none; }
.recent-word-item { border-bottom: .5px solid var(--border); font-family: var(--font); }
.recent-word-item:hover { color: var(--accent); transform: none; }
.recent-word-copy strong { font-family: var(--font); font-weight: 600; }

.dashboard-primary .dash-hero { border-radius: 18px; box-shadow: var(--shadow-sm); }
.dashboard-primary .upgrade-card { box-shadow: none; background: #f7f7fa; }
.level-ring { background: #fff; border: 0; box-shadow: none; }
.level-ring::before { background: conic-gradient(var(--accent) 0%, var(--accent) var(--progress), var(--muted) var(--progress), var(--muted) 100%); animation: none; }
.level-ring::after { background: #fff; }
.level-number, .wpm-big-value { color: var(--accent); font-family: var(--font); }
.section-title, .modal-content h2, .cal-result-card h2, .welcome-content p { font-family: var(--font); }
.level-segment { background: #f2f2f7; border: 0; border-radius: 8px; color: var(--text-muted); }
.level-segment.filled { background: var(--accent-dim); border: 0; color: var(--accent); }
.level-segment.current { background: var(--accent); border: 0; color: #fff; box-shadow: none; transform: none; }
.upgrade-bar-bg, .assessment-progress, .wl-bar-bg { background: var(--muted); border: 0; }
.upgrade-bar-fill, .assessment-progress-fill { background: var(--accent); }
.reading-wpm { background: rgba(118,118,128,.1); border: 0; border-radius: 999px; box-shadow: none; color: var(--text-secondary); }

.filter-btn, .sort-btn, .preset-btn, .vocab-actions button, .relearn-btn, .delete-btn {
  background: rgba(118,118,128,.1);
  border: 0;
  border-radius: 9px;
  box-shadow: none;
  color: var(--text-secondary);
  font-family: var(--font);
  transform: none;
}
.filter-btn:hover, .sort-btn:hover, .preset-btn:hover { background: rgba(118,118,128,.18); color: var(--text-primary); transform: none; box-shadow: none; }
.filter-btn.active, .sort-btn.active, .preset-btn.active { background: var(--accent); color: #fff; }
.vocab-table { overflow: hidden; }
.vocab-row { border-bottom: .5px solid var(--border); }
.vocab-row.header { background: #f7f7fa; color: var(--text-muted); }
.vocab-row:hover { background: #f9f9fb; }
.vocab-status, .wl-badge { border: 0; }
.wl-badge-active { background: var(--accent-dim); color: var(--accent); }
.wl-badge-locked, .wl-unknown, .vocab-status.dormant { background: rgba(118,118,128,.1); color: var(--text-muted); border: 0; }
.dashboard-vocabulary { border-top: .5px solid var(--border); }
.toast-notification { background: rgba(28,28,30,.92); border: 0; border-radius: 12px; box-shadow: var(--shadow-lg); color: #fff; backdrop-filter: blur(20px); }

@media (max-width: 768px) {
  .top-nav { height: 56px; }
  .reading-area { font-size: 1.12rem; line-height: 1.95; }
  .welcome-content h1 { font-size: 2.6rem; }
}

/* Dashboard visual refinement */
.dashboard-content {
  width: min(1380px, 100%);
  padding-top: 92px;
}

.dashboard-page-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}
.dashboard-eyebrow {
  margin-bottom: 5px;
  color: var(--accent);
  font-size: .68rem;
  font-weight: 750;
  letter-spacing: .14em;
}
.dashboard-page-header h1 {
  margin: 0;
  color: var(--text-primary);
  font-size: clamp(1.8rem, 3vw, 2.45rem);
  line-height: 1.08;
  letter-spacing: -.035em;
}
.dashboard-page-header p {
  margin: 7px 0 0;
  color: var(--text-muted);
  font-size: .86rem;
}
.dashboard-date {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(118,118,128,.09);
  color: var(--text-secondary);
  font-size: .75rem;
  white-space: nowrap;
}

.dashboard-grid {
  grid-template-columns: minmax(0, .94fr) minmax(0, 1.06fr);
  gap: 22px;
}
.dashboard-grid > *,
.dashboard-primary,
.dashboard-calendar,
.upgrade-info,
.manual-level-metric { min-width: 0; }
.dashboard-primary .dash-hero,
.daily-progress-card {
  border: 1px solid rgba(60,60,67,.12);
  border-radius: 22px;
  box-shadow: 0 10px 35px rgba(28,28,30,.055);
}
.dashboard-primary .dash-hero {
  grid-template-columns: 144px minmax(0, 1fr);
  gap: 18px 20px;
  padding: 24px;
  margin-bottom: 0;
  overflow: hidden;
}
.dashboard-primary .level-ring-container,
.dashboard-primary .level-ring {
  width: 136px;
  height: 136px;
}
.dashboard-primary .hero-stats {
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.dashboard-primary .hero-stat {
  padding: 13px 8px 12px;
  border-radius: 12px;
  background: rgba(118,118,128,.065);
}
.dashboard-primary .hero-stat:first-child { background: var(--accent-dim); }
.dashboard-primary .hero-stat-value { font-size: 1.5rem; font-weight: 750; letter-spacing: -.025em; }
.dashboard-primary .hero-stat-label { margin-top: 5px; }

.dashboard-primary .upgrade-card {
  padding: 15px 16px;
  border: 0;
  border-radius: 15px;
  background: #f7f7fa;
}
.manual-level-card { gap: 10px 14px; }
.manual-level-metric { width: 100%; }
.manual-level-label { font-size: .72rem; font-weight: 650; }
.manual-level-wpm { font-size: 1.65rem; letter-spacing: -.03em; }
.manual-level-count { margin-top: 1px; }
.manual-level-controls {
  position: absolute;
  top: 15px;
  right: 16px;
  gap: 7px;
}
.manual-level-card { position: relative; padding-right: 16px !important; }
.manual-level-label,
.manual-level-wpm,
.manual-level-count { max-width: calc(100% - 145px); }
.manual-level-btn {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 9px;
  background: rgba(118,118,128,.12);
  font-size: 1.1rem;
}
.manual-level-current { min-width: 52px; font-size: .82rem; }
.manual-level-status { margin-top: 2px; font-size: .67rem; }
.median-history-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-top: 13px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.median-history-heading span { font-size: .7rem; font-weight: 700; }
.median-history-heading small { color: var(--text-muted); font-size: .59rem; }
.median-more-btn {
  padding: 4px 9px;
  border: 0;
  border-radius: 8px;
  background: rgba(0,122,255,.1);
  color: var(--accent);
  font-size: .64rem;
  font-weight: 700;
  cursor: pointer;
}
.median-more-btn:hover { background: rgba(0,122,255,.17); }
.median-history { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 7px; margin-top: 7px; }
.median-window {
  min-width: 0;
  padding: 8px 7px;
  border: 0;
  border-radius: 10px;
  background: #fff;
  text-align: center;
}
.median-window span,
.median-window small { overflow-wrap: anywhere; }
.median-window.latest { background: var(--accent-dim); }
.median-window.latest strong { color: var(--accent); }
.median-window strong { font-size: 1rem; }
.median-more-panel[hidden] { display: none; }
.median-more-panel { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border); }
.median-average { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 9px 10px; border-radius: 10px; background: var(--accent-dim); }
.median-average span { color: var(--text-secondary); font-size: .66rem; }
.median-average strong { color: var(--accent); font-size: .9rem; }
.median-more-title { margin-top: 10px; color: var(--text-muted); font-size: .62rem; }
.median-average-list { display: grid; gap: 6px; margin-top: 7px; }
.median-average-row {
  display: grid;
  grid-template-columns: 58px minmax(80px, auto) 1fr;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: 10px;
  background: #fff;
}
.median-average-row.latest { background: var(--accent-dim); }
.median-average-row > span { color: var(--text-secondary); font-size: .66rem; font-weight: 650; }
.median-average-row strong { color: var(--text-primary); font-size: .82rem; }
.median-average-row.latest strong { color: var(--accent); }
.median-average-row small { color: var(--text-muted); font-size: .6rem; text-align: right; }
.median-average-empty { padding: 12px; border-radius: 10px; background: #fff; color: var(--text-muted); font-size: .65rem; text-align: center; }

.daily-progress-card { padding: 24px; }
.calendar-header .section-title { font-size: 1.05rem; }
.calendar-nav button { border: 0; background: rgba(118,118,128,.1); }
.calendar-weekdays { margin-top: 18px; }
.calendar-day {
  min-height: 50px;
  border: 0;
  border-radius: 11px;
  background: rgba(118,118,128,.06);
  transition: background .15s ease, transform .15s ease;
}
.calendar-day:not(.empty):hover { background: rgba(0,122,255,.1); transform: translateY(-1px); }
.calendar-day.today { box-shadow: inset 0 0 0 1.5px var(--accent); }
.calendar-day.selected { background: var(--accent); box-shadow: none; }
.calendar-summary { gap: 10px; margin-top: 18px; padding-top: 17px; }
.calendar-summary div { padding: 9px 5px; border-radius: 11px; background: rgba(118,118,128,.055); }
.calendar-summary strong { font-size: 1.25rem; }
.daily-accumulation { margin-top: 17px; padding-top: 17px; }
.daily-accumulation-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.daily-accumulation-title { margin: 0; font-size: .88rem; }
.daily-accumulation-heading > span { color: var(--text-muted); font-size: .64rem; }
.daily-accumulation .growth-metrics { gap: 7px; }
.daily-accumulation .growth-metric {
  padding: 10px 8px;
  border-radius: 10px;
  background: #f7f7fa;
  text-align: center;
}
.daily-accumulation .growth-metric strong { font-size: 1.02rem; }
.daily-accumulation .growth-metric span { margin-top: 2px; line-height: 1.3; }

.dashboard-vocabulary {
  margin-top: 26px;
  padding: 22px;
  border: 1px solid rgba(60,60,67,.12);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 10px 35px rgba(28,28,30,.045);
}
.dashboard-vocabulary .vocab-header { margin-bottom: 12px; }
.dashboard-vocabulary .vocab-table { border-radius: 14px; }

@media (min-width: 1121px) and (max-width: 1320px) {
  .dashboard-primary .dash-hero { grid-template-columns: 116px minmax(0, 1fr); padding: 20px; gap: 16px; }
  .dashboard-primary .level-ring-container,
  .dashboard-primary .level-ring { width: 112px; height: 112px; }
  .median-history { gap: 4px; }
  .median-window { padding: 7px 3px; }
  .median-window span, .median-window small { font-size: .53rem; }
}

@media (max-width: 1120px) {
  .dashboard-grid { grid-template-columns: 1fr; }
}
@media (max-width: 700px) {
  .dashboard-page-header { align-items: flex-start; }
  .dashboard-date { display: none; }
  .dashboard-primary .dash-hero { padding: 20px 16px; }
  .manual-level-card { padding-right: 14px !important; }
  .manual-level-label,
  .manual-level-wpm,
  .manual-level-count { max-width: 100%; }
  .manual-level-controls { position: static; margin-top: 4px; }
  .median-history { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .median-window:first-child { grid-column: 1 / -1; }
  .daily-progress-card { padding: 19px 15px; }
  .daily-accumulation-heading > span { display: none; }
  .dashboard-vocabulary { padding: 16px 12px; }
}