:root {
  --bg: #faf8f5;
  --surface: #ffffff;
  --surface-alt: #f3efe8;
  --surface-warm: #f8f3ec;
  --ink: #18181b;
  --ink-muted: #52525b;
  --ink-subtle: #5c5c66;
  --border: #e5dfd5;
  --border-strong: #d4cbc0;
  --brand: #b91c1c;
  --brand-hover: #991b1b;
  --brand-soft: #fef2f2;
  --brand-border: #fecaca;
  --gold: #a16207;
  --ok-bg: #ecfdf5;
  --ok-ink: #065f46;
  --ok-border: #a7f3d0;
  --warn-bg: #fffbeb;
  --warn-ink: #92400e;
  --warn-border: #fde68a;
  --danger-bg: #fef2f2;
  --danger-ink: #991b1b;
  --danger-border: #fecaca;
  --info-bg: #f1f5f9;
  --info-ink: #334155;
  --info-border: #cbd5e1;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(24, 24, 27, 0.05);
  --shadow-md: 0 8px 24px rgba(24, 24, 27, 0.06);
  --max-w: 1120px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-hanzi: "KaiTi", "STKaiti", "Noto Serif SC", "Songti SC", "PingFang SC", "Microsoft YaHei", serif;
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  line-height: 1.65;
  font-size: 16px;
}

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.hanzi-glyph {
  font-family: var(--font-hanzi);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 8px 14px;
  z-index: 1000;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
  border-radius: 6px;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 248, 245, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.brand:hover {
  text-decoration: none;
}

.brand-name {
  font-weight: 800;
  color: var(--ink);
}

.brand-dot {
  color: var(--brand);
}

.brand-sub {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: var(--surface);
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--ink-muted);
  font-weight: 500;
  font-size: 0.94rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--brand);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 12px;
  cursor: pointer;
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 600;
}

@media (max-width: 820px) {
  .brand-sub {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
    gap: 12px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open {
    display: flex;
  }
}

/* Hero & Interactive Generator */
.hero {
  padding: 38px 0 34px;
  background: radial-gradient(circle at top right, #fef2f2 0%, #faf8f5 55%);
  border-bottom: 1px solid var(--border);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--brand-border);
  color: var(--brand);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.85rem, 3.6vw, 2.55rem);
  line-height: 1.18;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.hero-lead {
  margin: 0 0 24px;
  color: var(--ink-muted);
  font-size: 1.05rem;
  max-width: 780px;
}

.studio-grid {
  display: grid;
  grid-template-columns: 1.42fr 0.9fr;
  gap: 18px;
  align-items: stretch;
}

@media (max-width: 960px) {
  .studio-grid {
    grid-template-columns: 1fr;
  }
}

.generator-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}

.card-kicker {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin: 0 0 6px;
}

.card-title-sm {
  margin: 0 0 14px;
  font-size: 1.18rem;
  line-height: 1.3;
}

.gen-form-grid {
  display: grid;
  grid-template-columns: minmax(165px, 1.25fr) minmax(165px, 1fr) minmax(175px, 1.1fr);
  gap: 12px;
}

@media (max-width: 680px) {
  .gen-form-grid {
    grid-template-columns: 1fr;
  }
}

.field label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 5px;
}

.input,
.select {
  width: 100%;
  min-height: 44px;
  padding: 9px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.96rem;
  background: var(--surface);
  color: var(--ink);
  font-family: inherit;
}

.input:focus,
.select:focus {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
  border-color: var(--brand);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 42px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 0.93rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.08s ease;
  font-family: inherit;
}

.btn:hover {
  text-decoration: none;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--brand);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--brand-hover);
  color: #ffffff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--ink);
  border-color: var(--border-strong);
}

.btn-secondary:hover {
  background: var(--surface-alt);
}

.btn-secondary.active {
  background: var(--brand-soft);
  color: var(--brand);
  border-color: var(--brand);
}

.btn-sm {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 0.84rem;
}

.quick-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
  font-size: 0.84rem;
  color: var(--ink-subtle);
}

.chip-btn {
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--ink-muted);
  border-radius: 999px;
  padding: 4px 11px;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
}

.chip-btn:hover {
  border-color: var(--brand);
  color: var(--brand);
  background: var(--brand-soft);
}

/* Search Box Dropdown / Results */
.lookup-results {
  margin-top: 12px;
  display: grid;
  gap: 8px;
  flex: 1;
  align-content: start;
}

.card-foot-link {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-subtle);
}

.lookup-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--ink);
  text-decoration: none;
}

.lookup-item:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
  text-decoration: none;
}

.lookup-glyph {
  font-family: var(--font-hanzi);
  font-size: 1.55rem;
  line-height: 1;
  color: var(--brand);
  min-width: 34px;
  text-align: center;
}

/* Generated Results on Home */
.gen-results {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: none;
}

.gen-results.active {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.gen-summary {
  margin-bottom: 10px;
  padding: 10px 13px;
  border-radius: var(--radius-sm);
  background: var(--surface-warm);
  border: 1px solid var(--border);
  font-size: 0.89rem;
  line-height: 1.48;
}

.sample-pill {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brand);
  background: var(--brand-soft);
  border: 1px solid rgba(185, 28, 28, 0.25);
  border-radius: 999px;
  padding: 1px 7px;
  margin-right: 6px;
  vertical-align: 1px;
}

.gen-options-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

@media (max-width: 1060px) {
  .gen-options-grid {
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  }
}

.gen-options-grid .option-card {
  padding: 13px;
  gap: 8px;
}

.gen-options-grid .option-zh-row {
  gap: 6px;
}

.gen-options-grid .option-zh {
  font-size: 1.38rem;
  white-space: nowrap;
}

.gen-options-grid .meta-line {
  font-size: 0.79rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.gen-options-grid .btn-sm {
  min-height: 29px;
  padding: 3px 8px;
  font-size: 0.75rem;
}

.gen-options-grid .card-excerpt {
  font-size: 0.82rem;
  line-height: 1.42;
}

.gen-options-grid .char-breakdown {
  gap: 5px;
  margin-top: auto;
}

.gen-options-grid .char-chip {
  padding: 3px 6px;
  font-size: 0.76rem;
  gap: 4px;
}

.gen-options-grid .char-chip-glyph {
  font-size: 1.05rem;
}

/* Sections */
.section {
  padding: 36px 0;
}

.section-alt {
  background: var(--surface-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.48rem;
  letter-spacing: -0.015em;
}

.section-sub {
  margin: 4px 0 0;
  color: var(--ink-muted);
  font-size: 0.95rem;
}

/* Cards & Grids */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 16px;
}

.hanzi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(225px, 1fr));
  gap: 14px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

.card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.card-head-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
}

.hanzi-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border-radius: 10px;
  background: var(--surface-warm);
  border: 1px solid var(--border);
  font-family: var(--font-hanzi);
  font-size: 2.35rem;
  color: var(--ink);
  line-height: 1;
  flex-shrink: 0;
}

.card-title {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.25;
}

.card-title a {
  color: var(--ink);
}

.card-title a:hover {
  color: var(--brand);
}

.meta-line {
  font-size: 0.87rem;
  color: var(--ink-subtle);
  margin-top: 3px;
}

.card-excerpt {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--border);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--ink-muted);
  background: var(--surface-alt);
  padding: 3px 8px;
  border-radius: 6px;
}

/* Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.74rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
}

.badge-ok {
  background: var(--ok-bg);
  color: var(--ok-ink);
  border-color: var(--ok-border);
}

.badge-warn {
  background: var(--warn-bg);
  color: var(--warn-ink);
  border-color: var(--warn-border);
}

.badge-danger {
  background: var(--danger-bg);
  color: var(--danger-ink);
  border-color: var(--danger-border);
}

.badge-info {
  background: var(--info-bg);
  color: var(--info-ink);
  border-color: var(--info-border);
}

/* Breadcrumb & Panels */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 0.86rem;
  color: var(--ink-subtle);
  margin: 20px 0 14px;
}

.breadcrumb a {
  color: var(--ink-muted);
}

.detail-hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 22px;
}

.hanzi-detail-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 28px;
  align-items: start;
}

@media (max-width: 820px) {
  .hanzi-detail-layout {
    grid-template-columns: 1fr;
  }
}

/* Hanzi Writer Stroke Box */
.writer-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: var(--surface-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}

.writer-canvas-wrap {
  position: relative;
  width: 260px;
  height: 260px;
  background: #ffffff;
  border: 2px solid var(--border-strong);
  border-radius: 12px;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.03);
  overflow: hidden;
  touch-action: none;
}

.writer-grid-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.writer-target {
  position: relative;
  z-index: 2;
  width: 260px;
  height: 260px;
}

.writer-status {
  width: 100%;
  text-align: center;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--ink-muted);
  min-height: 24px;
}

.writer-status.success {
  color: var(--ok-ink);
}

.writer-status.error {
  color: var(--brand);
}

.writer-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  width: 100%;
}

.writer-sub-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  width: 100%;
}

/* Facts Grid */
.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.fact-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.fact-k {
  display: block;
  font-size: 0.75rem;
  color: var(--ink-subtle);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 3px;
}

.fact-v {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--ink);
}

.bluf-box {
  background: var(--surface-warm);
  border-left: 4px solid var(--brand);
  padding: 14px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 16px 0;
}

.bluf-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand);
  margin-bottom: 4px;
}

.content-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 22px;
  box-shadow: var(--shadow-sm);
}

.content-panel h2 {
  margin: 0 0 14px;
  font-size: 1.32rem;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 740px) {
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

.compare-box {
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid var(--border);
  background: var(--surface);
}

.compare-good {
  background: #f5fbf8;
  border-color: var(--ok-border);
}

.compare-warn {
  background: #fffdf5;
  border-color: var(--warn-border);
}

.compare-bad {
  background: #fef8f8;
  border-color: var(--danger-border);
}

.compare-box h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

/* Name Option Cards */
.name-options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 16px;
}

.option-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-zh-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.option-zh {
  font-family: var(--font-hanzi);
  font-size: 2.15rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.1;
}

.char-breakdown {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.char-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 8px;
  background: var(--surface-warm);
  border: 1px solid var(--border);
  font-size: 0.84rem;
  color: var(--ink);
}

a.char-chip:hover {
  border-color: var(--brand);
  background: var(--brand-soft);
  text-decoration: none;
}

.char-chip-glyph {
  font-family: var(--font-hanzi);
  font-size: 1.25rem;
  color: var(--brand);
  font-weight: 700;
}

/* Tables */
.table-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.93rem;
}

.data-table th,
.data-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

.data-table th {
  color: var(--ink-subtle);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  background: var(--bg);
}

@media (max-width: 640px) {
  .detail-hero,
  .content-panel {
    padding: 16px;
  }

  .data-table {
    font-size: 0.85rem;
  }

  .data-table th,
  .data-table td {
    padding: 8px;
  }

  .data-table .btn-sm {
    padding: 5px 9px;
    font-size: 0.78rem;
  }
}

/* Directory Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 16px;
}

.alpha-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 18px;
}

.alpha-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-muted);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
}

.alpha-btn.active,
.alpha-btn:hover {
  background: var(--brand);
  color: #ffffff;
  border-color: var(--brand);
}

/* FAQ */
.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}

.faq-item h3 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.faq-item p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.94rem;
}

/* License Preformatted Block */
.license-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre-wrap;
  max-height: 360px;
  overflow-y: auto;
  color: var(--ink-muted);
}

/* Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 28px 0 36px;
  margin-top: 28px;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  color: var(--ink-muted);
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--brand);
}

.footer-attribution a,
.content-panel p a:not(.btn):not(.char-chip),
.gen-summary a,
.faq-item p a {
  text-decoration: underline;
  text-underline-offset: 2px;
}