:root {
  --paper: #17140f;
  --panel: #201c15;
  --panel-border: #362f22;
  --ink: #ede8dd;
  --muted: #b3a690;
  --accent: #e8b84b;
  --accent-ink: #241a02;
  --accent-soft: rgba(232, 184, 75, 0.14);
  --secondary: #4bc2b0;
  --secondary-soft: rgba(75, 194, 176, 0.14);
  --rule: #362f22;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.45);
  --radius: 10px;
}

:root[data-theme="light"] {
  --paper: #faf7f0;
  --panel: #ffffff;
  --panel-border: #e5ddc8;
  --ink: #241f14;
  --muted: #6b5f47;
  --accent: #b9860f;
  --accent-ink: #ffffff;
  --accent-soft: rgba(185, 134, 15, 0.1);
  --secondary: #2c7b73;
  --secondary-soft: rgba(44, 123, 115, 0.1);
  --rule: #e5ddc8;
  --shadow: 0 1px 2px rgba(36, 31, 20, 0.06), 0 8px 24px rgba(36, 31, 20, 0.08);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --paper: #faf7f0;
    --panel: #ffffff;
    --panel-border: #e5ddc8;
    --ink: #241f14;
    --muted: #6b5f47;
    --accent: #b9860f;
    --accent-ink: #ffffff;
    --accent-soft: rgba(185, 134, 15, 0.1);
    --secondary: #2c7b73;
    --secondary-soft: rgba(44, 123, 115, 0.1);
    --rule: #e5ddc8;
    --shadow: 0 1px 2px rgba(36, 31, 20, 0.06), 0 8px 24px rgba(36, 31, 20, 0.08);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1.1rem 1.75rem;
  border-bottom: 1px solid var(--rule);
  position: sticky;
  top: 0;
  background: var(--paper);
  z-index: 10;
}

.topbar-right {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.persona-switcher {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.persona-switcher label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  white-space: nowrap;
}

.persona-switcher select {
  font-size: 0.82rem;
  padding: 0.35rem 0.55rem;
  min-width: 160px;
}

.brand {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-sub {
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  margin-left: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.tabs {
  display: flex;
  gap: 0.4rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 100px;
  padding: 0.3rem;
}

.tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: 100px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.tab:hover {
  color: var(--ink);
}

.tab.active {
  background: var(--accent);
  color: var(--accent-ink);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.75rem 4rem;
}

.panel {
  display: none;
}

.panel.active {
  display: block;
}

.hero-line {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.4rem;
}

h1 {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
}

.lede {
  color: var(--muted);
  max-width: 68ch;
  margin: 0 0 1.6rem;
  font-size: 0.96rem;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 2.2rem 0 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-label::before {
  content: "";
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--secondary);
  flex: none;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 100px;
  background: var(--secondary-soft);
  color: var(--secondary);
  white-space: nowrap;
}

/* ---------- poster grid ---------- */

.poster-grid,
.rec-rail {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.9rem;
}

@media (max-width: 960px) {
  .poster-grid,
  .rec-rail {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 560px) {
  .poster-grid,
  .rec-rail {
    grid-template-columns: repeat(2, 1fr);
  }
}

.poster-card {
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  text-align: left;
  color: inherit;
  font: inherit;
  text-decoration: none;
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  transition: transform 0.15s ease;
}

.poster-card:hover {
  transform: translateY(-3px);
}

.poster-card img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  display: block;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}

.poster-card .poster-title {
  margin-top: 0.45rem;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.3;
}

.poster-card .poster-meta {
  font-size: 0.74rem;
  color: var(--muted);
}

.poster-card.viewed img {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ---------- recommendation rail ---------- */

.rec-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.rec-card img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  display: block;
}

.rec-card-body {
  padding: 0.75rem 0.85rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.rec-title {
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.25;
}

.rec-score-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.rec-score {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 0.74rem;
  color: var(--secondary);
}

.rec-level {
  font-size: 0.66rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.12rem 0.4rem;
  border-radius: 6px;
  white-space: nowrap;
}

.rec-level.level-strong {
  color: var(--accent-ink);
  background: var(--accent);
}

.rec-level.level-medium {
  color: var(--secondary);
  background: var(--secondary-soft);
}

.rec-level.level-weak {
  color: var(--muted);
  background: var(--panel-border);
}

.level-legend {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0 0 0.5rem;
}

.level-legend-label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  margin-right: 0.2rem;
}

.level-legend-text {
  font-size: 0.76rem;
  color: var(--muted);
  margin-right: 0.7rem;
}

.level-legend-note {
  font-size: 0.8rem;
  color: var(--muted);
  max-width: 68ch;
  margin: 0 0 1.4rem;
}

.rec-reason {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.4;
  margin-top: auto;
  padding-top: 0.4rem;
  border-top: 1px dashed var(--rule);
}

.empty-state {
  color: var(--muted);
  font-size: 0.88rem;
  padding: 1.4rem;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  text-align: center;
}

/* ---------- controls ---------- */

.controls-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1.1rem;
  margin-bottom: 1.6rem;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.control label {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.info-tooltip {
  position: relative;
  display: inline-flex;
  cursor: help;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--panel-border);
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0;
}

.info-tooltip-text {
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  width: 260px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.76rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
  line-height: 1.45;
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.15s ease;
  z-index: 20;
}

.info-tooltip-text::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--ink);
}

.info-tooltip:hover .info-tooltip-text,
.info-tooltip:focus .info-tooltip-text,
.info-tooltip:focus-within .info-tooltip-text {
  opacity: 1;
  visibility: visible;
}

select, input[type="range"] {
  font: inherit;
  color: var(--ink);
}

input[type="range"] {
  accent-color: var(--accent);
}

select {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 0.5rem 0.7rem;
  min-width: 220px;
}

.alpha-control {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.alpha-value {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  min-width: 2.6rem;
  color: var(--accent);
  font-weight: 700;
}

button.ghost {
  appearance: none;
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border-radius: 100px;
  cursor: pointer;
}

button.ghost:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.hidden {
  display: none !important;
}

.ghost-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 1.4rem;
}

.ghost-link:hover {
  color: var(--ink);
}

/* ---------- product detail page ---------- */

.product-hero {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

@media (max-width: 760px) {
  .product-hero {
    grid-template-columns: 1fr;
  }
}

.product-hero img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  display: block;
}

.product-hero-title {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 0 0.5rem;
}

.product-hero-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.product-hero-description {
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink);
  max-width: 62ch;
}

.viewed-strip {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0.9rem 0 0;
}

.viewed-strip .chip {
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 100px;
  padding: 0.2rem 0.6rem;
  font-weight: 600;
  font-size: 0.76rem;
}

/* ---------- Top 10 (Netflix/Canal+ style ranked rail) ---------- */

.top10-lede {
  font-size: 0.84rem;
  color: var(--muted);
  margin: -0.3rem 0 0.9rem;
}

.top10-rail {
  display: flex;
  gap: 1.6rem;
  overflow-x: auto;
  padding: 0.5rem 0.5rem 1rem;
  margin-bottom: 0.5rem;
}

.top10-item {
  display: flex;
  flex-direction: column;
  flex: none;
  width: 148px;
  text-decoration: none;
  color: inherit;
}

.top10-rank-poster {
  display: flex;
  align-items: flex-end;
}

.top10-rank {
  flex: none;
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-weight: 800;
  font-size: 5.5rem;
  line-height: 0.8;
  color: var(--paper);
  -webkit-text-stroke: 2px var(--ink);
  paint-order: stroke fill;
  margin-right: -1.3rem;
  z-index: 1;
  user-select: none;
}

.top10-poster {
  width: 108px;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 2;
  display: block;
}

.top10-title {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  line-height: 1.3;
}

.top10-item:hover .top10-title {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- persona callout ---------- */

.persona {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  background: var(--secondary-soft);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.6rem;
  max-width: 68ch;
}

.persona-tag {
  flex: none;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--secondary);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  margin-top: 0.1rem;
}

.persona p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink);
}

.persona strong {
  color: var(--secondary);
}

/* ---------- genre on rec cards ---------- */

.rec-genre-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.rec-genre {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: var(--panel-border);
  border-radius: 6px;
  padding: 0.15rem 0.45rem;
}

.rec-genre.match {
  color: var(--accent-ink);
  background: var(--accent);
}

.match-tag {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent);
}

.poster-card .poster-genre {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: var(--panel-border);
  border-radius: 6px;
  padding: 0.1rem 0.4rem;
  margin-top: 0.2rem;
}

/* ---------- "why" - SQL differentiation callout ---------- */

.sql-callout {
  display: none;
  align-items: flex-start;
  gap: 0.9rem;
  background: var(--accent-soft);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
  margin-bottom: 1.6rem;
  max-width: 68ch;
}

.sql-callout.visible {
  display: flex;
}

.sql-callout-tag {
  flex: none;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  margin-top: 0.1rem;
  white-space: nowrap;
}

.sql-callout p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink);
}

.sql-callout strong {
  color: var(--accent);
}

.sql-callout code {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-size: 0.85em;
}

/* ---------- "why" explainer (1 source vs N recs) ---------- */

.why-explainer {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 760px) {
  .why-explainer {
    grid-template-columns: 1fr;
  }
}

.why-source {
  position: sticky;
  top: 6.5rem;
}

.why-source img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: var(--radius);
  border: 2px solid var(--accent);
  display: block;
}

.why-source .why-source-title {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-weight: 700;
  font-size: 1.05rem;
  margin-top: 0.6rem;
}

.why-source .why-source-tag {
  font-size: 0.74rem;
  color: var(--muted);
  margin-top: 0.2rem;
}

.why-targets {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.why-target {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 1rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.9rem;
  align-items: center;
}

.why-target img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.why-target-title {
  font-weight: 700;
  font-size: 0.92rem;
}

.why-bar-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 0.4rem 0 0.5rem;
}

.why-bar-track {
  flex: 1;
  height: 6px;
  border-radius: 100px;
  background: var(--panel-border);
  overflow: hidden;
}

.why-bar-fill {
  height: 100%;
  background: var(--secondary);
  border-radius: 100px;
}

.why-bar-value {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-variant-numeric: tabular-nums;
  font-size: 0.76rem;
  color: var(--secondary);
  min-width: 3.4rem;
}

.why-target-explain {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.4;
}

/* ---------- similar users comparison ---------- */

.similarity-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  margin-bottom: 1.8rem;
}

@media (max-width: 760px) {
  .similarity-grid {
    grid-template-columns: 1fr;
  }
}

.persona-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.2rem 1.3rem;
}

.persona-card h3 {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 1.15rem;
  margin: 0 0 0.9rem;
}

.purchase-row {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.5rem 0;
  border-top: 1px dashed var(--rule);
}

.purchase-row:first-of-type {
  border-top: none;
}

.purchase-row img {
  width: 42px;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 5px;
  flex: none;
}

.purchase-row .purchase-title {
  font-size: 0.86rem;
  font-weight: 600;
  flex: 1;
}

.purchase-row .purchase-genre {
  font-size: 0.72rem;
  color: var(--muted);
}

.purchase-row.shared {
  background: var(--accent-soft);
  margin: 0 -0.6rem;
  padding: 0.5rem 0.6rem;
  border-radius: 8px;
  border-top: none;
}

.purchase-row.shared .purchase-title {
  color: var(--accent);
  font-weight: 700;
}

.shared-callout {
  background: var(--accent-soft);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  font-size: 0.92rem;
}

.shared-callout strong {
  color: var(--accent);
}

/* ---------- technical / mathematical deep-dive ---------- */

.tech-detail {
  margin-top: 1.6rem;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.3rem 1.5rem 1.5rem;
  max-width: 74ch;
}

.tech-detail-tag {
  display: inline-flex;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--secondary);
  background: var(--secondary-soft);
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  margin-bottom: 0.7rem;
}

.tech-detail h3 {
  font-family: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  font-size: 1.05rem;
  margin: 0 0 0.8rem;
}

.tech-detail p {
  font-size: 0.86rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 0 0 0.9rem;
}

.tech-detail p:last-child {
  margin-bottom: 0;
}

.tech-detail strong {
  color: var(--ink);
}

.tech-detail code {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  background: var(--paper);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-size: 0.85em;
  color: var(--ink);
}

.tech-formula {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.86rem;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 0.9rem 1.1rem;
  margin: 0 0 0.9rem;
  overflow-x: auto;
  white-space: nowrap;
}

/* ---------- architecture page ---------- */

.arch-p {
  font-size: 0.92rem;
  color: var(--muted);
  max-width: 74ch;
  line-height: 1.55;
  margin: 0 0 1.4rem;
}

.arch-p code,
.arch-table code {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 4px;
  padding: 0.05rem 0.35rem;
  font-size: 0.85em;
  color: var(--ink);
}

.arch-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  margin: 0 0 1.6rem;
}

.arch-tier {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.9rem;
  width: 100%;
}

.arch-connector {
  font-size: 1.3rem;
  color: var(--muted);
  line-height: 1;
}

.arch-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.75rem 1.1rem;
  min-width: 160px;
  font-size: 0.86rem;
}

.arch-box strong {
  font-size: 0.88rem;
}

.arch-box span {
  font-size: 0.74rem;
  color: var(--muted);
}

.arch-box.accent {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.arch-box.accent strong {
  color: var(--accent);
}

.arch-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  width: 100%;
  max-width: 640px;
}

@media (max-width: 640px) {
  .arch-columns {
    grid-template-columns: 1fr;
  }
}

.arch-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.arch-column-title {
  font-weight: 700;
  font-size: 0.88rem;
  color: var(--secondary);
  margin-bottom: 0.2rem;
}

.arch-column .arch-box {
  width: 100%;
}

.arch-flow {
  display: flex;
  align-items: stretch;
  flex-wrap: nowrap;
  gap: 0.7rem;
  margin: 0 0 0.6rem;
  overflow-x: auto;
  padding-bottom: 0.3rem;
}

.arch-flow-arrow {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  color: var(--muted);
  flex: none;
}

.arch-flow .arch-box {
  min-width: 150px;
}

.arch-loop-note {
  font-size: 0.84rem;
  color: var(--secondary);
  font-weight: 600;
  margin: 0 0 1.8rem;
}

.arch-table-wrap {
  overflow-x: auto;
  margin-bottom: 1.8rem;
}

.arch-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 640px;
  font-size: 0.86rem;
}

.arch-table th,
.arch-table td {
  text-align: left;
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid var(--rule);
}

.arch-table th {
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

.arch-table td:first-child {
  font-weight: 700;
}

.arch-roadmap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
}

@media (max-width: 760px) {
  .arch-roadmap {
    grid-template-columns: 1fr;
  }
}

.arch-roadmap-col {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem 1.3rem;
}

.arch-roadmap-tag {
  display: inline-flex;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  margin-bottom: 0.8rem;
}

.arch-roadmap-tag.done {
  color: var(--secondary);
  background: var(--secondary-soft);
}

.arch-roadmap-tag.next {
  color: var(--accent);
  background: var(--accent-soft);
}

.arch-roadmap-col ul {
  margin: 0;
  padding-left: 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.arch-roadmap-col li {
  font-size: 0.84rem;
  color: var(--muted);
  line-height: 1.45;
}

/* ---------- model tracking chart ---------- */

.model-chart {
  display: flex;
  align-items: flex-end;
  gap: 1rem;
  height: 220px;
  padding: 1rem 1.2rem 0;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--rule);
  overflow-x: auto;
}

.model-bar {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  flex: none;
  width: 64px;
  height: 100%;
  gap: 0.4rem;
}

.model-bar-value {
  font-family: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
}

.model-bar-fill {
  width: 100%;
  min-height: 4px;
  border-radius: 6px 6px 0 0;
  background: var(--secondary);
  opacity: 0.55;
}

.model-bar.active .model-bar-fill {
  background: var(--accent);
  opacity: 1;
}

.model-bar-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--muted);
}

.model-bar.active .model-bar-label {
  color: var(--accent);
}