:root {
  --bg: #f4efe6;
  --bg-accent: radial-gradient(circle at top left, rgba(229, 122, 72, 0.24), transparent 34%),
    radial-gradient(circle at top right, rgba(32, 86, 118, 0.18), transparent 30%),
    linear-gradient(180deg, #f8f3eb 0%, #efe7da 100%);
  --panel: rgba(255, 252, 246, 0.92);
  --panel-strong: rgba(255, 251, 244, 0.98);
  --border: rgba(88, 63, 43, 0.16);
  --text: #24180f;
  --muted: #65584f;
  --accent: #c8572a;
  --accent-deep: #8f3217;
  --accent-cool: #225974;
  --success: #285c44;
  --shadow: 0 14px 40px rgba(65, 43, 25, 0.12);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  background: #efe7da;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background: var(--bg-accent);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

button,
select,
input,
video {
  font: inherit;
}

.page-shell {
  width: min(1480px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 36px;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255, 246, 235, 0.96), rgba(245, 235, 221, 0.9));
  box-shadow: var(--shadow);
  margin-bottom: 18px;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-weight: 800;
}

.title {
  margin: 10px 0 8px;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 0.98;
  font-weight: 900;
  letter-spacing: -0.04em;
}

.subtitle {
  margin: 0;
  max-width: 56ch;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.5;
}

.hero-actions {
  min-width: 320px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: stretch;
}

.source-toggle {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  padding: 8px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.52);
}

.hero-tool-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.source-btn,
.nav-btn,
.action-btn,
.pill-btn,
.preset-btn {
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.72);
  color: var(--text);
  border-radius: 14px;
  cursor: pointer;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.source-btn:hover,
.nav-btn:hover,
.action-btn:hover,
.pill-btn:hover,
.preset-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(200, 87, 42, 0.34);
}

.source-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
  border-color: transparent;
}

.source-btn.active,
.action-btn.active,
.pill-btn.active,
.preset-btn.active {
  background: var(--accent);
  color: #fff9f1;
  border-color: var(--accent);
}

.source-btn {
  padding: 12px 14px;
  font-weight: 700;
}

.action-btn {
  padding: 12px 12px;
  font-weight: 700;
}

.accent-outline {
  background: rgba(255, 255, 255, 0.38);
  border-color: rgba(200, 87, 42, 0.16);
}

.hero-note {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid var(--border);
}

.layout {
  display: grid;
  grid-template-columns: 332px 1fr;
  gap: 18px;
}

.control-panel,
.comparison-panel {
  min-width: 0;
}

.control-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.comparison-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel,
.stage,
.footer-note {
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.panel {
  padding: 18px;
}

.stage {
  padding: 20px;
}

.panel-label {
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-cool);
}

.nav-row {
  display: grid;
  grid-template-columns: 48px 48px 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.nav-btn {
  width: 48px;
  height: 48px;
  font-size: 20px;
  font-weight: 700;
}

.counter {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(34, 89, 116, 0.1);
  color: var(--accent-cool);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.text-input,
.sample-select {
  width: 100%;
  min-width: 0;
  padding: 12px 14px;
  border: 1px solid rgba(88, 63, 43, 0.18);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  outline: none;
}

.text-input:focus,
.sample-select:focus {
  border-color: rgba(200, 87, 42, 0.48);
  box-shadow: 0 0 0 4px rgba(200, 87, 42, 0.1);
}

.chip-row,
.pill-row,
.badge-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-chip,
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.meta-chip {
  background: rgba(34, 89, 116, 0.09);
  color: var(--accent-cool);
}

.meta-chip.easy {
  background: rgba(40, 92, 68, 0.12);
  color: var(--success);
}

.meta-chip.medium {
  background: rgba(200, 126, 20, 0.12);
  color: #9a5b11;
}

.meta-chip.hard {
  background: rgba(164, 42, 42, 0.12);
  color: #972d2d;
}

.meta-chip.count {
  background: rgba(200, 87, 42, 0.12);
  color: var(--accent-deep);
}

.meta-list {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.meta-list > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.54);
}

.meta-key {
  color: var(--muted);
}

.meta-value {
  font-weight: 700;
  text-align: right;
}

.button-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.filter-group + .filter-group {
  margin-top: 12px;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

.preset-btn,
.pill-btn {
  padding: 9px 12px;
  font-size: 13px;
  font-weight: 700;
}

.wide-btn {
  width: 100%;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 16px;
}

.header-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.section-title {
  margin: 4px 0 0;
  font-size: clamp(22px, 2vw, 30px);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.results-summary {
  color: var(--text);
  font-weight: 800;
}

.active-filter-summary {
  color: var(--muted);
  font-size: 13px;
}

.video-card {
  padding: 14px;
  border: 1px solid rgba(88, 63, 43, 0.18);
  border-radius: var(--radius-lg);
  background: var(--panel-strong);
}

.gt-card {
  margin-bottom: 0;
}

.card-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.card-subtitle {
  color: var(--muted);
  font-size: 13px;
}

.badge {
  background: var(--accent-cool);
  color: #f6fbff;
}

.badge-secondary {
  background: rgba(200, 87, 42, 0.12);
  color: var(--accent-deep);
}

.badge-gt {
  background: var(--accent);
}

.video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #0e0e0e;
  border-radius: 16px;
  border: 1px solid rgba(33, 24, 17, 0.14);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(248px, 1fr));
  gap: 14px;
}

.empty-state {
  margin-top: 14px;
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px dashed rgba(88, 63, 43, 0.22);
  background: rgba(255, 255, 255, 0.5);
  color: var(--muted);
}

.footer-note {
  margin-top: 18px;
  padding: 18px 20px;
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
}

code {
  padding: 2px 7px;
  border-radius: 999px;
  background: rgba(34, 89, 116, 0.08);
  color: var(--accent-cool);
}

@media (max-width: 1120px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .hero {
    flex-direction: column;
  }

  .hero-actions {
    min-width: 0;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 20px, 1480px);
    padding-top: 16px;
  }

  .hero,
  .stage,
  .panel,
  .footer-note {
    border-radius: 22px;
  }

  .hero-tool-row,
  .button-grid,
  .preset-grid {
    grid-template-columns: 1fr;
  }

  .section-header {
    flex-direction: column;
    align-items: stretch;
  }

  .header-side {
    align-items: flex-start;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }
}