@import url("https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&family=Instrument+Serif:ital@0;1&display=swap");

:root {
  color-scheme: light;
  --bg: #f5f4ef;
  --panel: #fcfbf8;
  --panel-strong: #ffffff;
  --panel-muted: #ece8df;
  --ink: #111111;
  --ink-soft: #4e4a44;
  --muted: #7a746b;
  --line: #151515;
  --line-soft: rgba(17, 17, 17, 0.12);
  --max: 1560px;
  --sans: "IBM Plex Sans", sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  width: 100%;
  max-width: 100%;
}

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

code {
  font-family: var(--mono);
}

.site-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(245, 244, 239, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.topbar-inner,
.page,
.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.topbar-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
}

.brand-mark,
.status-pill,
.pill,
.button,
.ghost-button,
.copy-button,
.text-link {
  border: 1px solid var(--line);
}

.brand-mark,
.status-pill,
.pill,
.button,
.ghost-button,
.copy-button,
.text-link {
  background: var(--panel-strong);
}

.brand-mark,
.eyebrow,
.card-kicker,
.status-pill,
.meta-block h4,
.back-link,
.hero-caption-label,
.card-overlay-label,
.step-number,
.route-count,
.micro-note {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand-mark {
  padding: 0.44rem 0.62rem;
}

.brand-name {
  font-size: 0.92rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  font-size: 0.84rem;
  color: var(--ink-soft);
}

.nav a:hover,
.back-link:hover {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.status-pill {
  padding: 0.38rem 0.7rem;
}

.page {
  padding: 18px 0 88px;
}

.section {
  padding: 34px 0 40px;
  border-top: 1px solid var(--line-soft);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.74fr);
  gap: 20px;
  align-items: end;
  margin-bottom: 18px;
}

.eyebrow,
.card-kicker,
.back-link,
.micro-note {
  margin: 0 0 10px;
  color: var(--muted);
}

.section-title,
.hero-title,
.card-title,
.detail-title,
.card-overlay-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.04em;
}

.hero-title {
  font-size: clamp(3rem, 6.2vw, 6rem);
  line-height: 0.92;
  max-width: 11ch;
}

.section-title,
.detail-title {
  font-size: clamp(2rem, 3vw, 3.2rem);
  line-height: 0.96;
}

.card-title {
  font-size: 1.5rem;
  line-height: 1.05;
}

.section-summary,
.hero-intro,
.hero-support,
.hero-note,
.card-summary,
.detail-summary,
.meta-block p,
.reference-list,
.step-list p,
.empty-note,
figcaption,
code {
  color: var(--ink-soft);
}

.section-summary,
.hero-intro,
.hero-support,
.page-lead-aside p,
.detail-summary {
  font-size: 1rem;
}

.button,
.ghost-button,
.copy-button,
.text-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  transition: background-color 120ms ease, color 120ms ease, transform 120ms ease;
}

.button {
  background: var(--ink);
  color: var(--panel-strong);
}

.button:hover,
.ghost-button:hover,
.copy-button:hover,
.text-link:hover,
.pill:hover {
  background: var(--ink);
  color: var(--panel-strong);
  text-decoration: none;
  transform: translateY(-1px);
}

.hero-actions,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 10px;
  font-size: 0.74rem;
}

.pill.is-static {
  cursor: default;
}

.card-surface {
  border: 1px solid var(--line);
  background: var(--panel);
}

.hero-stage {
  padding: 10px 0 34px;
}

.hero-stage-grid,
.page-lead,
.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(340px, 0.9fr);
  gap: 18px;
}

.page-lead-copy {
  padding-right: 18px;
}

.hero-support {
  max-width: 44rem;
}

.hero-aside,
.page-lead-aside,
.detail-copy,
.route-card,
.usecase-card,
.movement-card,
.family-card,
.detail-card {
  overflow: hidden;
}

.hero-aside,
.page-lead-aside,
.detail-copy {
  padding: 18px;
}

.hero-aside-dark {
  display: grid;
  align-content: start;
  gap: 14px;
  background: var(--ink);
  color: var(--panel-strong);
}

.hero-aside-dark .eyebrow,
.hero-aside-dark .hero-intro,
.hero-aside-dark .hero-support,
.hero-aside-dark .hero-note,
.hero-aside-dark .step-number,
.hero-aside-dark .hero-step-line p {
  color: rgba(255, 255, 255, 0.84);
}

.hero-aside-dark .ghost-button {
  background: transparent;
  color: var(--panel-strong);
  border-color: rgba(255, 255, 255, 0.24);
}

.hero-aside-dark .button {
  background: var(--panel-strong);
  color: var(--ink);
}

.hero-mini-steps {
  display: grid;
  gap: 10px;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.hero-step-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.hero-step-line p {
  margin: 0;
  font-size: 0.95rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: clamp(110px, 8vw, 150px);
  grid-auto-flow: dense;
  gap: 14px;
}

.hero-tile {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-muted);
}

.hero-tile--hero {
  grid-column: span 7;
  grid-row: span 4;
}

.hero-tile--tall {
  grid-column: span 5;
  grid-row: span 2;
}

.hero-tile--wide {
  grid-column: span 6;
  grid-row: span 1;
}

.hero-tile--standard {
  grid-column: span 3;
  grid-row: span 1;
}

.image-frame,
.image-figure {
  margin: 0;
  height: 100%;
  background: var(--panel-muted);
}

.image-frame {
  overflow: hidden;
}

.image-frame img,
.detail-media img,
.gallery-grid img,
.movement-strip img,
.card-media img {
  height: 100%;
  object-fit: cover;
  transition: transform 220ms ease;
}

.hero-tile:hover img,
.card-media:hover img,
.image-figure:hover img {
  transform: scale(1.02);
}

.hero-tile .image-frame,
.hero-tile img,
.detail-media,
.detail-media .image-frame,
.detail-media img {
  height: 100%;
}

.hero-caption,
.card-overlay {
  position: absolute;
  inset: auto 0 0;
  display: grid;
  gap: 2px;
  padding: 14px;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.84) 100%);
  color: var(--panel-strong);
}

.hero-caption-meta {
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.84rem;
}

.card-overlay-title {
  font-size: 1.18rem;
  line-height: 1.05;
}

.route-grid,
.family-grid,
.movement-grid,
.usecase-grid,
.detail-section-grid,
.gallery-grid {
  display: grid;
  gap: 16px;
}

.route-grid,
.movement-grid,
.usecase-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.family-grid,
.detail-section-grid,
.gallery-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-body {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.card-summary,
.meta-block p,
.page-lead-aside p,
.reference-list {
  margin: 0;
}

.route-card-top,
.movement-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.route-count {
  color: var(--muted);
}

.family-card-media,
.usecase-media {
  position: relative;
  display: block;
  min-height: 320px;
  border-bottom: 1px solid var(--line);
}

.movement-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 220px;
  border-bottom: 1px solid var(--line);
}

.meta-block {
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
}

.meta-block h4 {
  margin: 0 0 6px;
  color: var(--muted);
}

.bullet-list,
.reference-list {
  margin: 0;
  padding-left: 18px;
}

.reference-link {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-lead {
  padding: 12px 0 30px;
}

.page-lead-aside {
  display: grid;
  align-content: start;
  gap: 16px;
}

.detail-hero {
  padding: 12px 0 22px;
}

.detail-copy {
  display: grid;
  align-content: start;
  gap: 12px;
}

.detail-meta-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.image-figure {
  border: 1px solid var(--line);
  background: var(--panel);
}

.image-figure figcaption {
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.84rem;
}

.prompt-card code,
.detail-card code {
  display: block;
  white-space: pre-wrap;
  font-size: 0.84rem;
  line-height: 1.7;
}

.back-link {
  display: inline-flex;
}

.image-placeholder {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 18px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed var(--line-soft);
  background: var(--panel-muted);
}

.empty-note {
  margin: 0;
}

.footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px 0 30px;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 1240px) {
  .section-head,
  .hero-stage-grid,
  .page-lead,
  .detail-hero,
  .detail-meta-grid,
  .route-grid,
  .movement-grid,
  .usecase-grid {
    grid-template-columns: 1fr;
  }

  .family-grid,
  .detail-section-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  .hero-stage-grid,
  .hero-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-stage-grid {
    gap: 16px;
  }

  .hero-grid {
    grid-auto-rows: 240px;
  }

  .hero-tile--hero,
  .hero-tile--tall,
  .hero-tile--wide,
  .hero-tile--standard {
    grid-column: span 1;
    grid-row: span 1;
  }

  .movement-grid,
  .usecase-grid,
  .detail-meta-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar-inner,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .route-grid,
  .family-grid,
  .movement-grid,
  .usecase-grid,
  .detail-section-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-stage-grid,
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    grid-auto-rows: 250px;
  }

  .hero-tile--hero,
  .hero-tile--tall,
  .hero-tile--wide,
  .hero-tile--standard {
    grid-column: auto;
  }

  .family-card-media,
  .usecase-media {
    min-height: 280px;
  }

  .hero-title {
    max-width: none;
  }
}