/* ===========================================================
   WordUp · Editorial / Literary Aesthetic
   Inspired by Webster's Dictionary, The Paris Review,
   Aperture magazine, Oxford World's Classics.
   =========================================================== */

:root {
  /* —— ink + paper —— */
  --paper:        #F4EEE0;     /* aged cream */
  --paper-dim:    #ECE3D0;     /* shadowed margin */
  --paper-bright: #FBF6EA;     /* page highlight */
  --ink:          #1A1612;     /* warm black */
  --ink-soft:     #4A4138;     /* heading secondary */
  --stone:        #8C7E6B;     /* dust gray, secondary text */
  --stone-soft:   #B5A993;     /* tertiary, mute */
  --hairline:     rgba(26, 22, 18, 0.16);
  --hairline-strong: rgba(26, 22, 18, 0.32);

  /* —— accents (used SPARINGLY) —— */
  --vermilion:    #B5432A;     /* old book stamp */
  --vermilion-ink:#8A2F1E;
  --forest:       #3F5742;     /* correct / success */
  --forest-soft:  #B7C4AE;
  --gold:         #B8893A;     /* streak / special */
  --burgundy:     #6F2A2A;     /* deep error */
  --burgundy-soft:#D9B5B0;

  /* —— typography —— */
  --serif-display: 'Fraunces', 'Times New Roman', Georgia, serif;
  --serif-body:    'EB Garamond', 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --mono:          'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --serif-zh:      'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;

  /* —— spacing rhythm (golden-ratio inspired) —— */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 14px;
  --s-4: 22px;
  --s-5: 36px;
  --s-6: 58px;
  --s-7: 92px;

  /* —— optical sizes —— */
  --opsz-display: 'opsz' 144;
  --opsz-text:    'opsz' 14;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
button { font: inherit; color: inherit; cursor: pointer; border: none; background: none; }
button:disabled { cursor: not-allowed; opacity: 0.5; }
input, select { font: inherit; color: inherit; }
em { font-style: italic; }

/* ---------- Body / paper ---------- */
html, body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-body), var(--serif-zh);
  font-size: 17px;
  line-height: 1.55;
  font-feature-settings: "kern", "liga", "onum" 1;     /* oldstyle figures */
}

/* Subtle paper grain — only one tiny SVG noise pattern, opacity-tuned */
.paper-grain {
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.1 0 0 0 0 0.05 0 0 0 0.42 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.55;
  mix-blend-mode: multiply;
}

/* ===========================================================
   Editorial Masthead
   =========================================================== */
.masthead {
  position: relative;
  z-index: 2;
  padding: var(--s-5) clamp(20px, 6vw, 80px) 0;
  background: var(--paper);
}

.rule { display: block; }
.rule-thin { border-top: 1px solid var(--hairline-strong); }
.rule-double {
  display: grid; gap: 3px;
  margin: var(--s-3) 0;
}
.rule-double > div {
  height: 1px; background: var(--ink);
}
.rule-double > div:first-child { opacity: 1; }
.rule-double > div:last-child  { opacity: 0.45; }

.masthead-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: var(--s-4);
  padding: var(--s-4) 0 var(--s-3);
}

.brand {
  text-align: center;
  cursor: pointer;
  user-select: none;
  letter-spacing: -0.005em;
}
.brand-marque {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--vermilion);
  margin-bottom: var(--s-2);
}
.brand-title {
  font-family: var(--serif-display);
  font-variation-settings: "opsz" 144, "wght" 600, "SOFT" 30, "WONK" 1;
  font-weight: 600;
  font-size: clamp(28px, 4.6vw, 44px);
  line-height: 0.95;
  color: var(--ink);
}
.brand-title em {
  font-style: italic;
  font-variation-settings: "opsz" 144, "wght" 400, "SOFT" 80;
  color: var(--ink-soft);
}
.brand-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--stone);
  margin-top: var(--s-2);
}

.masthead-meta {
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}
.meta-left  { justify-content: flex-start; }
.meta-right { justify-content: flex-end;  flex-wrap: wrap; }
.meta-divider { color: var(--hairline-strong); }
.kicker {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--stone);
  font-weight: 500;
}
.figure {
  font-family: var(--serif-display);
  font-variation-settings: "opsz" 96, "wght" 600;
  font-feature-settings: "onum" 1;     /* oldstyle figures */
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
  line-height: 1;
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 56px);
  padding: var(--s-3) 0;
}
.nav-item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 0;
  position: relative;
  color: var(--ink-soft);
  transition: color .2s ease;
}
.nav-en {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500;
}
.nav-zh {
  font-family: var(--serif-zh);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--stone);
}
.nav-item::after {
  content: '';
  position: absolute; left: 50%; bottom: -7px;
  width: 0; height: 1px;
  background: var(--vermilion);
  transform: translateX(-50%);
  transition: width .25s cubic-bezier(.6,.2,.2,1);
}
.nav-item:hover { color: var(--ink); }
.nav-item:hover::after { width: 100%; }
.nav-item.active { color: var(--vermilion); }
.nav-item.active::after { width: 100%; }
.nav-item.active .nav-zh { color: var(--vermilion); opacity: 0.7; }

/* ===========================================================
   Main view & shared
   =========================================================== */
main#view {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 0 auto;
  padding: var(--s-6) clamp(20px, 6vw, 80px) var(--s-7);
  min-height: calc(100vh - 280px);
}

/* h2 etc. that JS injects with inline style:font-size:22px; — override */
main#view h2 {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 80, "wght" 500, "SOFT" 30 !important;
  font-size: clamp(28px, 3.6vw, 38px) !important;
  letter-spacing: -0.012em !important;
  color: var(--ink) !important;
  margin-bottom: var(--s-4) !important;
  font-weight: 500 !important;
}
main#view h2::before {
  content: '§ ';
  color: var(--vermilion);
  font-family: var(--serif-display);
  margin-right: 4px;
  font-style: italic;
}

/* Generic heading kicker */
.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--vermilion);
  margin-bottom: var(--s-2);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 14px 28px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
  border-radius: 0;
  position: relative;
  transition: all .25s cubic-bezier(.6,.2,.2,1);
  cursor: pointer;
}
.btn::before {
  content: ''; position: absolute; inset: 0;
  background: var(--ink);
  transform: scaleY(0); transform-origin: bottom;
  transition: transform .3s cubic-bezier(.6,.2,.2,1);
  z-index: -1;
}
.btn:hover { color: var(--paper); }
.btn:hover::before { transform: scaleY(1); }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--ink);
  color: var(--paper);
}
.btn-primary::before { background: var(--vermilion); }
.btn-primary:hover  { color: var(--paper); }
.btn-ghost { background: transparent; }
.btn-success { border-color: var(--forest); color: var(--forest); }
.btn-success::before { background: var(--forest); }
.btn-success:hover { color: var(--paper); }
.btn-danger  { border-color: var(--burgundy); color: var(--burgundy); }
.btn-danger::before { background: var(--burgundy); }
.btn-danger:hover  { color: var(--paper); }
.btn-block { width: 100%; }
.btn-lg { padding: 18px 36px; font-size: 13px; }

/* ===========================================================
   Home — magazine cover treatment
   =========================================================== */
.hero {
  position: relative;
  background: transparent !important;
  padding: var(--s-6) 0 !important;
  border-radius: 0 !important;
  box-shadow: none !important;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--s-6);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
  color: var(--ink) !important;
  margin-bottom: var(--s-6) !important;
}
.hero::before {
  content: 'Issue No. ' counter(issue, decimal-leading-zero);
  counter-reset: issue var(--issue-num, 1);
  position: absolute; top: 12px; left: 0;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--stone);
}
.hero h1 {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 144, "wght" 400, "SOFT" 50, "WONK" 1 !important;
  font-size: clamp(36px, 6.4vw, 72px) !important;
  font-weight: 400 !important;
  line-height: 1.02 !important;
  letter-spacing: -0.022em !important;
  color: var(--ink) !important;
  margin-bottom: var(--s-3) !important;
  max-width: 14ch;
}
.hero h1::first-letter {
  font-variation-settings: "opsz" 144, "wght" 600, "SOFT" 90, "WONK" 1;
  color: var(--vermilion);
}
.hero .hero-sub {
  font-family: var(--serif-body) !important;
  font-style: italic;
  font-size: 18px !important;
  line-height: 1.5 !important;
  color: var(--ink-soft) !important;
  opacity: 1 !important;
  max-width: 36ch;
  margin-bottom: var(--s-4) !important;
}

.hero-stats {
  display: flex !important;
  gap: 0 !important;
  margin-top: var(--s-3) !important;
  border-top: 1px solid var(--hairline);
  padding-top: var(--s-3);
}
.hero-stat-block {
  background: transparent !important;
  backdrop-filter: none !important;
  padding: 0 var(--s-4) 0 0 !important;
  border-radius: 0 !important;
  font-weight: 400 !important;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--hairline);
  margin-right: var(--s-4);
  color: var(--ink) !important;
  font-family: var(--serif-display);
  font-variation-settings: "opsz" 96, "wght" 500;
  font-size: 26px;
  font-feature-settings: "onum" 1;
  line-height: 1;
}
.hero-stat-block:last-child { border-right: 0; margin-right: 0; }
.hero-stat-block small {
  display: block !important;
  font-family: var(--mono);
  font-size: 10px !important;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--stone) !important;
  font-weight: 500 !important;
  margin-bottom: 8px;
  opacity: 1 !important;
}

.hero-cta {
  background: var(--ink) !important;
  color: var(--paper) !important;
  padding: 24px 38px !important;
  border-radius: 0 !important;
  font-family: var(--mono) !important;
  font-size: 12px !important;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-weight: 500 !important;
  box-shadow: none !important;
  border: 1px solid var(--ink);
  position: relative;
  transition: all .35s cubic-bezier(.6,.2,.2,1) !important;
  align-self: stretch;
  display: grid;
  place-items: center;
  min-width: 220px;
  text-align: center;
  line-height: 1.4;
}
.hero-cta:hover {
  background: var(--vermilion) !important;
  border-color: var(--vermilion);
  transform: none !important;
}

/* ---------- Daily metric cards ---------- */
.daily-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0 !important;
  margin-bottom: var(--s-6) !important;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.metric-card {
  background: transparent !important;
  border: 0 !important;
  border-right: 1px solid var(--hairline) !important;
  border-radius: 0 !important;
  padding: var(--s-4) var(--s-3) !important;
  display: block !important;
  position: relative;
}
.metric-card:last-child { border-right: 0 !important; }
.metric-card::before {
  content: counter(metric-num, decimal-leading-zero) '.';
  counter-increment: metric-num;
  position: absolute; top: 14px; right: 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--stone-soft);
}
.daily-grid { counter-reset: metric-num; }

.metric-icon {
  font-size: 22px !important;
  width: auto !important;
  height: auto !important;
  background: transparent !important;
  display: inline-block !important;
  margin-bottom: var(--s-2);
  filter: grayscale(0.3) sepia(0.2);
  opacity: 0.85;
}
.metric-value {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 96, "wght" 500, "SOFT" 30;
  font-feature-settings: "onum" 1;
  font-size: 36px !important;
  font-weight: 500 !important;
  line-height: 1 !important;
  letter-spacing: -0.02em;
  color: var(--ink) !important;
  margin-bottom: 4px;
}
.metric-label {
  font-family: var(--mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--stone) !important;
}

/* ---------- Section grid ---------- */
.section-grid {
  display: grid !important;
  grid-template-columns: 1.4fr 1fr !important;
  gap: var(--s-5) !important;
}
.card {
  background: transparent !important;
  border: 0 !important;
  border-radius: 0 !important;
  padding: 0 !important;
  box-shadow: none !important;
}
.card-title {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 80, "wght" 500;
  font-size: 22px !important;
  font-weight: 500 !important;
  margin-bottom: var(--s-3) !important;
  color: var(--ink);
  display: flex;
  align-items: baseline;
  gap: var(--s-2);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: var(--s-2);
}
.card-title::after {
  content: '';
  flex: 1;
  height: 0;
}

/* ---------- Heatmap (week + month) ---------- */
.heatmap-week {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-top: var(--s-3);
}
.heatmap-cell {
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--stone);
  font-weight: 500;
  background: var(--paper-dim);
  border-radius: 0;
  transition: transform .2s ease, background .2s;
  position: relative;
}
.heatmap-cell.lvl-1 { background: #DDD2BB; color: var(--ink); }
.heatmap-cell.lvl-2 { background: #C2A77A; color: var(--paper); }
.heatmap-cell.lvl-3 { background: var(--gold); color: var(--paper); }
.heatmap-cell.lvl-4 { background: var(--vermilion); color: var(--paper); }
.heatmap-cell.today {
  outline: 1px solid var(--ink);
  outline-offset: 2px;
}
.heatmap-cell:hover { transform: scale(1.08); }

/* ---------- List progress (in card) ---------- */
.progress-bar {
  height: 2px !important;
  background: var(--paper-dim) !important;
  border-radius: 0 !important;
  overflow: hidden !important;
}
.progress-fill {
  height: 100% !important;
  background: var(--ink) !important;
  border-radius: 0 !important;
}

/* ===========================================================
   Study mode — dictionary entry treatment
   =========================================================== */
.study-shell {
  max-width: 720px !important;
  margin: 0 auto !important;
}
.study-progress {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-5);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--hairline);
}
.progress-quit {
  width: 28px; height: 28px;
  display: grid; place-items: center;
  font-size: 14px;
  color: var(--stone);
  border: 1px solid var(--hairline-strong);
  border-radius: 0;
  transition: all .2s;
}
.progress-quit:hover {
  border-color: var(--burgundy);
  color: var(--burgundy);
}
.study-progress .progress-bar {
  flex: 1;
  height: 1px !important;
  background: var(--hairline) !important;
}
.study-progress .progress-fill {
  background: var(--ink) !important;
}
.progress-hearts {
  display: flex;
  gap: 5px;
  font-size: 0;
  letter-spacing: 0;
}
.progress-hearts span {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
  background: var(--vermilion);
  font-size: 0;
}
.progress-hearts span:nth-child(n) {
  /* hearts that are 🤍 (white) — get this via JS text — fallback */
}
/* JS sets text to ❤️ or 🤍 — override emoji rendering */
.progress-hearts span {
  text-indent: -9999px;
  overflow: hidden;
}

/* ---------- Question card ---------- */
.q-card {
  background: var(--paper-bright) !important;
  border: 0 !important;
  border-radius: 0 !important;
  padding: var(--s-6) clamp(24px, 5vw, 56px) !important;
  box-shadow:
    0 1px 0 var(--hairline),
    0 0 0 1px var(--hairline),
    20px 20px 0 -16px var(--paper-dim) !important;
  min-height: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  position: relative;
}
.q-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(to right, var(--ink) 0 33%, transparent 33% 66%, var(--vermilion) 66%);
  background-size: 12px 4px;
  background-repeat: repeat-x;
  opacity: 0.85;
}

.q-mode-tag {
  display: inline-block !important;
  font-family: var(--mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.3em !important;
  text-transform: uppercase;
  background: transparent !important;
  color: var(--vermilion) !important;
  padding: 0 !important;
  border-radius: 0 !important;
  margin-bottom: var(--s-3) !important;
  position: relative;
  padding-left: 14px !important;
}
.q-mode-tag::before {
  content: '§';
  position: absolute; left: 0;
  font-family: var(--serif-display);
  font-style: italic;
}

.q-prompt {
  font-family: var(--serif-body) !important;
  font-style: italic;
  font-size: 16px !important;
  color: var(--ink-soft) !important;
  margin-bottom: var(--s-4) !important;
}
.q-prompt::before { content: '“'; margin-right: 2px; color: var(--stone); }
.q-prompt::after  { content: '”'; margin-left: 2px;  color: var(--stone); }

.q-word {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 144, "wght" 500, "SOFT" 30, "WONK" 1 !important;
  font-size: clamp(48px, 8vw, 88px) !important;
  font-weight: 500 !important;
  letter-spacing: -0.025em !important;
  line-height: 0.95 !important;
  color: var(--ink) !important;
  margin-bottom: var(--s-2) !important;
}
.q-phonetic {
  font-family: var(--serif-body) !important;
  font-style: italic;
  font-size: 19px !important;
  color: var(--stone) !important;
  margin-bottom: var(--s-5) !important;
  display: flex;
  align-items: center;
  gap: var(--s-2);
  letter-spacing: 0;
}

.speak-btn {
  width: 30px !important;
  height: 30px !important;
  display: inline-grid; place-items: center;
  background: transparent !important;
  color: var(--ink) !important;
  border: 1px solid var(--hairline-strong);
  border-radius: 50%;
  font-size: 13px !important;
  transition: all .2s;
}
.speak-btn:hover {
  background: var(--ink) !important;
  color: var(--paper) !important;
  border-color: var(--ink);
}

/* ---------- Options ---------- */
.q-options {
  display: grid !important;
  grid-template-columns: 1fr !important;
  gap: 0 !important;
  margin-top: auto !important;
  border-top: 1px solid var(--hairline);
}
.q-option {
  background: transparent !important;
  border: 0 !important;
  border-bottom: 1px solid var(--hairline) !important;
  border-radius: 0 !important;
  padding: 18px 0 !important;
  text-align: left !important;
  font-family: var(--serif-body) !important;
  font-size: 18px !important;
  font-weight: 400 !important;
  color: var(--ink) !important;
  display: grid !important;
  grid-template-columns: 28px 24px 1fr !important;
  align-items: center;
  gap: var(--s-3) !important;
  transition: all .2s ease;
  position: relative;
}
.q-option > span:last-child {
  font-family: var(--serif-zh), var(--serif-body);
}
/* The numbered key is the first child .q-option-key */
.q-option-key {
  width: 24px !important;
  height: 24px !important;
  display: grid !important;
  place-items: center !important;
  background: transparent !important;
  border: 1px solid var(--hairline-strong);
  border-radius: 50%;
  font-family: var(--mono) !important;
  font-weight: 500 !important;
  font-size: 11px !important;
  color: var(--stone) !important;
  flex-shrink: 0;
  transition: all .2s;
}
.q-option::before {
  content: '';
  display: block;
  width: 18px; height: 1px;
  background: var(--hairline-strong);
  transition: width .25s cubic-bezier(.6,.2,.2,1), background .2s;
}
.q-option:hover:not(.locked) {
  transform: none !important;
  background: rgba(184, 67, 42, 0.05) !important;
  padding-left: 8px !important;
}
.q-option:hover:not(.locked)::before {
  width: 32px;
  background: var(--vermilion);
}
.q-option:hover:not(.locked) .q-option-key {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.q-option.correct {
  background: rgba(63, 87, 66, 0.08) !important;
  border-color: var(--forest) !important;
}
.q-option.correct::before { background: var(--forest); width: 32px; }
.q-option.correct .q-option-key {
  background: var(--forest) !important;
  color: var(--paper) !important;
  border-color: var(--forest);
}
.q-option.correct::after {
  content: '✓';
  position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--serif-display);
  font-size: 22px;
  color: var(--forest);
  font-weight: 600;
}
.q-option.wrong {
  background: rgba(111, 42, 42, 0.05) !important;
  border-color: var(--burgundy) !important;
}
.q-option.wrong::before { background: var(--burgundy); }
.q-option.wrong .q-option-key {
  background: var(--burgundy) !important;
  color: var(--paper) !important;
  border-color: var(--burgundy);
}
.q-option.wrong::after {
  content: '✕';
  position: absolute; right: 8px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--serif-display);
  font-size: 22px;
  color: var(--burgundy);
}
.q-option.locked { cursor: default; }

/* ---------- Spell input ---------- */
.q-input {
  width: 100% !important;
  padding: 16px 0 !important;
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 144, "wght" 500, "SOFT" 30, "WONK" 1;
  font-weight: 500 !important;
  font-size: 36px !important;
  text-align: center !important;
  background: transparent !important;
  border: 0 !important;
  border-bottom: 1px solid var(--ink) !important;
  border-radius: 0 !important;
  letter-spacing: 0.04em !important;
  text-transform: lowercase;
  outline: none;
  color: var(--ink) !important;
  margin-top: var(--s-3) !important;
  transition: border-color .2s;
}
.q-input:focus {
  border-color: var(--vermilion) !important;
}
.q-input.correct {
  border-color: var(--forest) !important;
  background: rgba(63, 87, 66, 0.06) !important;
}
.q-input.wrong {
  border-color: var(--burgundy) !important;
  background: rgba(111, 42, 42, 0.05) !important;
  animation: shake .35s cubic-bezier(.36,.07,.19,.97);
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-3px); }
  80% { transform: translateX(3px); }
}

/* ---------- Cloze ---------- */
.q-cloze {
  font-family: var(--serif-body) !important;
  font-size: 22px !important;
  line-height: 1.7 !important;
  background: transparent !important;
  border-left: 2px solid var(--ink) !important;
  border-radius: 0 !important;
  padding: var(--s-2) var(--s-4) !important;
  margin-bottom: var(--s-4) !important;
  font-style: italic;
  color: var(--ink);
}
.cloze-blank {
  display: inline-block !important;
  min-width: 100px !important;
  padding: 0 var(--s-2) !important;
  border-bottom: 1px solid var(--vermilion) !important;
  margin: 0 4px !important;
  font-family: var(--serif-display) !important;
  font-style: italic;
  font-weight: 500 !important;
  text-align: center !important;
  color: var(--vermilion) !important;
  letter-spacing: 0.2em;
}

/* ---------- Feedback bar ---------- */
.feedback {
  margin-top: var(--s-4) !important;
  padding: var(--s-3) var(--s-4) !important;
  border-radius: 0 !important;
  display: flex !important;
  align-items: center !important;
  gap: var(--s-3) !important;
  font-family: var(--serif-body);
  border-left: 3px solid currentColor;
}
.feedback.correct { background: rgba(63, 87, 66, 0.08) !important; color: var(--forest) !important; }
.feedback.wrong   { background: rgba(111, 42, 42, 0.05) !important; color: var(--burgundy) !important; }
.feedback-icon {
  font-size: 20px !important;
  font-family: var(--serif-display);
  font-style: italic;
}
.feedback-detail {
  flex: 1 !important;
  font-family: var(--serif-body) !important;
  font-size: 16px !important;
  font-style: italic;
  color: var(--ink) !important;
}
.feedback-detail strong {
  font-family: var(--serif-display) !important;
  font-style: normal;
  font-weight: 600 !important;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.feedback .btn {
  flex-shrink: 0;
}

.study-actions {
  display: flex;
  gap: var(--s-3);
  margin-top: var(--s-5);
}

/* ===========================================================
   Session summary
   =========================================================== */
.summary-shell {
  max-width: 580px !important;
  margin: var(--s-7) auto 0 !important;
  text-align: center !important;
  padding-top: 0 !important;
}
.summary-trophy {
  font-size: 0 !important;
  margin-bottom: var(--s-3) !important;
  position: relative;
  display: inline-block;
  width: 80px;
  height: 80px;
}
.summary-trophy::before {
  content: '✦';
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-family: var(--serif-display);
  font-style: italic;
  font-size: 48px;
  color: var(--vermilion);
  font-weight: 400;
}
.summary-title {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 144, "wght" 400, "SOFT" 60, "WONK" 1;
  font-weight: 400 !important;
  font-size: clamp(36px, 5vw, 56px) !important;
  letter-spacing: -0.02em !important;
  margin-bottom: var(--s-3) !important;
  color: var(--ink);
  font-style: italic;
}
.summary-sub {
  font-family: var(--serif-body) !important;
  font-style: italic;
  color: var(--ink-soft) !important;
  font-size: 16px !important;
  margin-bottom: var(--s-5) !important;
}
.summary-stats {
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 0 !important;
  margin-bottom: var(--s-5) !important;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  padding: var(--s-3) 0;
}
.summary-stat {
  background: transparent !important;
  border: 0 !important;
  border-right: 1px solid var(--hairline) !important;
  border-radius: 0 !important;
  padding: var(--s-2) !important;
}
.summary-stat:last-child { border-right: 0 !important; }
.summary-stat-value {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 96, "wght" 500;
  font-feature-settings: "onum" 1;
  font-size: 32px !important;
  font-weight: 500 !important;
  color: var(--ink) !important;
  letter-spacing: -0.02em;
}
.summary-stat-label {
  font-family: var(--mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--stone) !important;
  margin-top: 4px;
}

/* ===========================================================
   Lexicon (word grid)
   =========================================================== */
.list-tabs {
  display: flex !important;
  gap: var(--s-4) !important;
  margin-bottom: var(--s-3) !important;
  flex-wrap: wrap !important;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: var(--s-3);
}
.list-tab {
  padding: 4px 0 !important;
  background: transparent !important;
  border: 0 !important;
  border-radius: 0 !important;
  font-family: var(--mono) !important;
  font-size: 11px !important;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  font-weight: 500 !important;
  color: var(--stone) !important;
  position: relative;
  transition: color .2s;
}
.list-tab::after {
  content: '';
  position: absolute; bottom: -14px; left: 0; right: 0;
  height: 1px; background: var(--ink);
  transform: scaleX(0); transform-origin: left;
  transition: transform .25s cubic-bezier(.6,.2,.2,1);
}
.list-tab:hover { color: var(--ink) !important; }
.list-tab.active {
  background: transparent !important;
  color: var(--vermilion) !important;
  border-color: transparent !important;
}
.list-tab.active::after {
  transform: scaleX(1);
  background: var(--vermilion);
}

.search-box {
  width: 100% !important;
  padding: 14px 0 !important;
  background: transparent !important;
  border: 0 !important;
  border-bottom: 1px solid var(--hairline-strong) !important;
  border-radius: 0 !important;
  font-family: var(--serif-body) !important;
  font-size: 17px !important;
  font-style: italic;
  color: var(--ink) !important;
  outline: none;
  margin-bottom: var(--s-5) !important;
}
.search-box::placeholder {
  color: var(--stone-soft);
  font-style: italic;
}
.search-box:focus { border-color: var(--ink) !important; }

.word-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)) !important;
  gap: 0 !important;
  border-top: 1px solid var(--hairline);
}
.word-card {
  background: transparent !important;
  border: 0 !important;
  border-bottom: 1px solid var(--hairline) !important;
  border-right: 1px solid var(--hairline) !important;
  border-radius: 0 !important;
  padding: var(--s-3) var(--s-3) !important;
  cursor: pointer;
  transition: background .2s ease !important;
  position: relative;
}
.word-card:hover {
  background: var(--paper-dim) !important;
  transform: none !important;
  box-shadow: none !important;
  border-color: var(--hairline) !important;
}
.word-card .w-en {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 80, "wght" 500, "SOFT" 30;
  font-weight: 500 !important;
  font-size: 22px !important;
  letter-spacing: -0.012em;
  color: var(--ink) !important;
  margin-bottom: 2px;
}
.word-card .w-pos {
  font-family: var(--serif-body) !important;
  color: var(--stone) !important;
  font-size: 13px !important;
  font-style: italic !important;
}
.word-card .w-zh {
  font-family: var(--serif-zh), var(--serif-body) !important;
  color: var(--ink-soft) !important;
  font-size: 14px !important;
  margin-top: var(--s-2) !important;
  line-height: 1.5;
}
.word-card .w-mastery {
  position: absolute !important;
  top: 14px !important;
  right: 14px !important;
  font-family: var(--mono) !important;
  font-size: 9px !important;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-weight: 500 !important;
  padding: 2px 6px !important;
  border-radius: 0 !important;
  border: 1px solid currentColor;
}
.mastery-new       { background: transparent !important; color: var(--stone-soft) !important; }
.mastery-learning  { background: transparent !important; color: var(--gold) !important; }
.mastery-review    { background: transparent !important; color: var(--ink) !important; }
.mastery-mastered  { background: var(--forest) !important; color: var(--paper) !important; border-color: var(--forest) !important; }

/* ===========================================================
   Word detail modal — dictionary entry
   =========================================================== */
.modal {
  position: fixed; inset: 0;
  background: rgba(26, 22, 18, 0.45);
  display: grid; place-items: center;
  z-index: 100;
  backdrop-filter: blur(2px);
  animation: fadeIn .2s ease-out;
  padding: 20px;
}
.modal.hidden { display: none; }
.modal-card {
  background: var(--paper-bright);
  border: 0 !important;
  border-radius: 0 !important;
  padding: var(--s-6) var(--s-5) !important;
  max-width: 620px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow:
    0 0 0 1px var(--hairline-strong),
    20px 20px 0 -16px var(--paper-dim) !important;
  position: relative;
  animation: popIn .25s cubic-bezier(.6,.2,.2,1);
}
.modal-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(to right, var(--ink) 0 33%, transparent 33% 66%, var(--vermilion) 66%);
  background-size: 12px 4px;
  background-repeat: repeat-x;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}
.modal-close {
  position: absolute !important;
  top: 16px !important; right: 16px !important;
  width: 28px !important; height: 28px !important;
  background: transparent !important;
  border: 1px solid var(--hairline-strong) !important;
  border-radius: 50% !important;
  font-size: 13px !important;
  color: var(--stone) !important;
  font-family: var(--mono);
  transition: all .2s;
}
.modal-close:hover {
  background: var(--ink) !important;
  color: var(--paper) !important;
  border-color: var(--ink) !important;
}

.detail-head {
  display: flex !important;
  align-items: baseline;
  gap: var(--s-2);
  flex-wrap: wrap;
  margin-bottom: var(--s-3) !important;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: var(--s-3);
}
.detail-word {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 144, "wght" 500, "SOFT" 30, "WONK" 1 !important;
  font-weight: 500 !important;
  font-size: clamp(40px, 6vw, 56px) !important;
  letter-spacing: -0.025em;
  color: var(--ink);
  line-height: 1;
}
.detail-phonetic {
  font-family: var(--serif-body) !important;
  font-style: italic;
  color: var(--stone) !important;
  font-size: 19px !important;
}
.detail-pos {
  font-family: var(--serif-body) !important;
  color: var(--vermilion) !important;
  font-style: italic !important;
  font-size: 16px !important;
  margin-left: var(--s-2);
}
.detail-section {
  margin-top: var(--s-4) !important;
}
.detail-label {
  font-family: var(--mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.32em !important;
  text-transform: uppercase;
  color: var(--vermilion) !important;
  margin-bottom: var(--s-2) !important;
  font-weight: 500 !important;
}
.detail-meanings {
  font-family: var(--serif-body), var(--serif-zh) !important;
  font-size: 18px !important;
  line-height: 1.7 !important;
  color: var(--ink);
}
.detail-meanings > div {
  padding-left: 24px;
  position: relative;
  margin-bottom: 4px;
}
.detail-meanings > div::before {
  content: counter(meaning);
  counter-increment: meaning;
  position: absolute; left: 0; top: 4px;
  font-family: var(--serif-display);
  font-size: 14px;
  color: var(--vermilion);
  font-weight: 500;
}
.detail-meanings { counter-reset: meaning; }
.detail-meanings > div:first-child::before { content: '1'; }

.detail-example {
  background: transparent !important;
  border-left: 2px solid var(--vermilion) !important;
  border-radius: 0 !important;
  padding: var(--s-2) var(--s-3) !important;
  margin-bottom: var(--s-2) !important;
}
.detail-example .ex-en {
  font-family: var(--serif-body) !important;
  font-style: italic;
  font-size: 17px !important;
  line-height: 1.55;
  color: var(--ink);
}
.detail-example .ex-en::before { content: '“'; color: var(--vermilion); font-style: normal; }
.detail-example .ex-en::after  { content: '”'; color: var(--vermilion); font-style: normal; }
.detail-example .ex-zh {
  font-family: var(--serif-zh), var(--serif-body) !important;
  color: var(--stone) !important;
  font-size: 14px !important;
  margin-top: 4px !important;
}
.detail-mnemonic {
  background: var(--paper-dim) !important;
  padding: var(--s-3) !important;
  border-radius: 0 !important;
  font-family: var(--serif-body), var(--serif-zh) !important;
  font-size: 15px !important;
  border-left: 2px solid var(--gold) !important;
  font-style: italic;
  line-height: 1.6;
}
.detail-etymology {
  font-family: var(--serif-body), var(--serif-zh) !important;
  color: var(--stone) !important;
  font-size: 15px !important;
  line-height: 1.65 !important;
  font-style: italic;
}

/* ===========================================================
   Stats page
   =========================================================== */
.stats-grid {
  display: grid !important;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)) !important;
  gap: 0 !important;
  margin-bottom: var(--s-5) !important;
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}
.stat-tile {
  background: transparent !important;
  border: 0 !important;
  border-right: 1px solid var(--hairline) !important;
  border-radius: 0 !important;
  padding: var(--s-4) var(--s-3) !important;
  text-align: left !important;
  position: relative;
}
.stat-tile:last-child { border-right: 0 !important; }
.stat-tile-icon {
  font-size: 18px !important;
  margin-bottom: var(--s-2) !important;
  filter: grayscale(0.4) sepia(0.3);
  opacity: 0.7;
}
.stat-tile-value {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 96, "wght" 500;
  font-feature-settings: "onum" 1;
  font-size: 32px !important;
  font-weight: 500 !important;
  color: var(--ink) !important;
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-tile-label {
  font-family: var(--mono) !important;
  font-size: 10px !important;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--stone) !important;
  margin-top: var(--s-2);
}

.heatmap-month {
  display: grid;
  grid-template-columns: repeat(15, 1fr);
  gap: 4px;
}
.heatmap-month .heatmap-cell { font-size: 9px; }

.mastery-bar {
  display: flex !important;
  height: 32px !important;
  border-radius: 0 !important;
  overflow: hidden !important;
  margin: var(--s-3) 0 !important;
  border: 1px solid var(--ink) !important;
}
.mastery-seg {
  display: grid; place-items: center;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--paper);
}
.mastery-seg.new        { background: var(--stone-soft); color: var(--ink); }
.mastery-seg.learning   { background: var(--gold); }
.mastery-seg.review     { background: var(--ink-soft); }
.mastery-seg.mastered   { background: var(--vermilion); }

/* ===========================================================
   Settings
   =========================================================== */
.setting-row {
  display: flex !important;
  justify-content: space-between !important;
  align-items: center !important;
  padding: var(--s-3) 0 !important;
  border-bottom: 1px solid var(--hairline) !important;
}
.setting-row:last-child { border: none !important; }
.setting-label {
  font-family: var(--serif-display) !important;
  font-variation-settings: "opsz" 80, "wght" 500;
  font-size: 18px !important;
  font-weight: 500 !important;
  color: var(--ink);
}
.setting-desc {
  font-family: var(--serif-body) !important;
  color: var(--stone) !important;
  font-size: 14px !important;
  font-style: italic;
  margin-top: 2px !important;
}
.setting-control select,
.setting-control input[type="number"] {
  padding: 8px 12px !important;
  background: transparent !important;
  border: 1px solid var(--ink) !important;
  border-radius: 0 !important;
  font-family: var(--serif-body) !important;
  font-size: 16px !important;
  color: var(--ink) !important;
}

/* ===========================================================
   Toast
   =========================================================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(160%);
  background: var(--ink);
  color: var(--paper);
  padding: 14px 24px;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  z-index: 200;
  transition: transform .35s cubic-bezier(.6,.2,.2,1);
  pointer-events: none;
  border: 1px solid var(--ink);
  box-shadow: 8px 8px 0 var(--vermilion);
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.streak { background: var(--vermilion); border-color: var(--vermilion); box-shadow: 8px 8px 0 var(--ink); }

/* ===========================================================
   Empty state
   =========================================================== */
.empty {
  text-align: center;
  padding: var(--s-7) 20px;
  color: var(--stone);
  font-family: var(--serif-body);
  font-style: italic;
}
.empty-icon {
  font-family: var(--serif-display);
  font-size: 48px;
  font-style: italic;
  color: var(--vermilion);
  opacity: 0.4;
  margin-bottom: var(--s-3);
}
.empty-icon::before { content: '✦'; }

/* ===========================================================
   Colophon footer
   =========================================================== */
.colophon {
  position: relative;
  z-index: 2;
  padding: var(--s-4) clamp(20px, 6vw, 80px) var(--s-5);
  margin-top: var(--s-6);
}
.colophon-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--s-3);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--stone-soft);
  margin-top: var(--s-3);
}

/* ===========================================================
   Page entrance animations (staggered)
   =========================================================== */
.fade-in { animation: pageFade .45s cubic-bezier(.6,.2,.2,1); }
@keyframes pageFade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.slide-up > * { animation: pageFade .5s cubic-bezier(.6,.2,.2,1) backwards; }
.slide-up > *:nth-child(1) { animation-delay: 0ms; }
.slide-up > *:nth-child(2) { animation-delay: 60ms; }
.slide-up > *:nth-child(3) { animation-delay: 120ms; }
.slide-up > *:nth-child(4) { animation-delay: 180ms; }
.slide-up > *:nth-child(5) { animation-delay: 240ms; }

main#view.fade-in > *,
main#view.fade-in .hero,
main#view.fade-in .daily-grid,
main#view.fade-in .section-grid,
main#view.fade-in h2 {
  animation: pageFade .55s cubic-bezier(.6,.2,.2,1) backwards;
}
main#view.fade-in > *:nth-child(1) { animation-delay: 0ms; }
main#view.fade-in > *:nth-child(2) { animation-delay: 80ms; }
main#view.fade-in > *:nth-child(3) { animation-delay: 160ms; }
main#view.fade-in > *:nth-child(4) { animation-delay: 240ms; }

/* ===========================================================
   Responsive (must stay LAST so it overrides defaults)
   =========================================================== */
@media (max-width: 760px) {
  :root { --s-6: 36px; --s-7: 56px; }
  main#view { padding: var(--s-5) clamp(18px, 5vw, 36px) var(--s-6); }
  .masthead { padding-left: clamp(18px, 5vw, 36px); padding-right: clamp(18px, 5vw, 36px); }
  .masthead-row { grid-template-columns: 1fr; gap: var(--s-3); text-align: center; padding: var(--s-3) 0; }
  .meta-left, .meta-right { justify-content: center; }
  .nav { gap: var(--s-3); }

  .hero {
    grid-template-columns: 1fr !important;
    padding: var(--s-5) 0 !important;
    text-align: left;
  }
  .hero h1 { max-width: none; }
  .hero-cta { justify-self: stretch; }

  .daily-grid { grid-template-columns: repeat(2, 1fr) !important; }
  .metric-card:nth-child(2n) { border-right: 0 !important; }
  .metric-card:nth-child(-n+2) { border-bottom: 1px solid var(--hairline) !important; }

  .section-grid { grid-template-columns: 1fr !important; gap: var(--s-5) !important; }
  .word-grid { grid-template-columns: 1fr !important; }
  .word-card { border-right: 0 !important; }

  .summary-stats { grid-template-columns: 1fr !important; }
  .summary-stat { border-right: 0 !important; border-bottom: 1px solid var(--hairline) !important; }
  .summary-stat:last-child { border-bottom: 0 !important; }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }
  .stat-tile:nth-child(2n) { border-right: 0 !important; }

  .heatmap-month { grid-template-columns: repeat(10, 1fr); }

  .q-card { padding: var(--s-4) var(--s-3) !important; }
  .q-input { font-size: 28px !important; }
}

@media (max-width: 460px) {
  body { font-size: 16px; }
  .nav { gap: var(--s-2) var(--s-3); }
  .nav-en { font-size: 10.5px; letter-spacing: 0.22em; }
  .nav-zh { font-size: 10px; }
  .heatmap-month { grid-template-columns: repeat(7, 1fr); }
  .stats-grid { grid-template-columns: 1fr !important; }
  .stat-tile { border-right: 0 !important; border-bottom: 1px solid var(--hairline) !important; }
}