:root {
  --bg: #f3f3f1;
  --bg-strong: #e8e8e5;
  --paper: #ffffff;
  --ink: #101010;
  --ink-soft: #5a5a5a;
  --accent: #1a1a1a;
  --accent-strong: #000000;
  --line: rgba(16, 16, 16, 0.12);
  --shadow: 0 18px 40px rgba(16, 16, 16, 0.06);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #f7f7f5 0%, var(--bg) 100%);
}

.page-shell {
  width: min(1400px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.hero,
.layout,
.docs-layout {
  display: grid;
  gap: 20px;
}

.hero {
  grid-template-columns: 1.4fr 1fr;
  align-items: stretch;
  margin-bottom: 20px;
}

.hero-copy,
.hero-card,
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 28px;
}

.hero-card,
.card {
  padding: 20px;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 0.82rem;
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink);
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.02;
  max-width: 13ch;
}

.lede,
.helper,
.panel-header p,
.result-meta,
.constant-list,
.equation-list {
  color: var(--ink-soft);
}

.lede {
  max-width: 52ch;
  margin-top: 18px;
  font-size: 1.02rem;
  line-height: 1.6;
}

.layout {
  grid-template-columns: 430px 1fr;
  margin-bottom: 20px;
}

.docs-layout {
  grid-template-columns: 1fr 1fr;
}

.panel-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.panel-header p {
  margin: 0;
  max-width: 32ch;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.field span {
  font-size: 0.86rem;
  font-family: "IBM Plex Mono", monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field-label-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.field-help {
  color: var(--ink-soft);
  font-size: 0.88rem;
  line-height: 1.45;
}

.info-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 999px;
  background: rgba(16, 16, 16, 0.08);
  color: var(--ink);
  font-size: 0.72rem;
  font-family: "IBM Plex Mono", monospace;
  cursor: help;
}

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

input,
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(16, 16, 16, 0.16);
  background: #ffffff;
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 110px;
}

.button-row {
  display: flex;
  gap: 10px;
  margin: 10px 0 16px;
  flex-wrap: wrap;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 11px 16px;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-button {
  background: linear-gradient(135deg, #1a1a1a, #000000);
  color: white;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.18);
}

.secondary-button {
  background: rgba(16, 16, 16, 0.08);
  color: var(--ink);
}

.ghost-button {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid rgba(16, 16, 16, 0.18);
}

.wide-button {
  width: 100%;
}

#map {
  width: 100%;
  min-height: 520px;
  border-radius: 14px;
  border: 1px solid var(--line);
  overflow: hidden;
}

.scenario-fields {
  margin: 12px 0 6px;
}

.result-card,
.doc-card {
  padding: 16px;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid rgba(16, 16, 16, 0.08);
}

.result-card + .result-card,
.doc-card + .doc-card {
  margin-top: 12px;
}

.result-card h3,
.doc-card h3 {
  margin-bottom: 10px;
}

.detail-chip-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.detail-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(16, 16, 16, 0.06);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  cursor: help;
}

.reference-list,
.doc-list {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.result-meta,
.equation-list,
.constant-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.7;
}

.status {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  font-family: "IBM Plex Mono", monospace;
  background: rgba(16, 16, 16, 0.06);
  color: var(--ink);
}

@media (max-width: 1080px) {
  .hero,
  .layout,
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    padding: 28px;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1400px);
    padding-top: 16px;
  }

  .hero-card,
  .card {
    padding: 18px;
  }

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

  #map {
    min-height: 400px;
  }
}

.site-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 56px;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 22px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1a1a1a, #000000);
  color: #fff;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.brand-text strong,
.brand-text span {
  display: block;
}

.brand-text strong {
  font-size: 0.98rem;
}

.brand-text span {
  color: var(--ink-soft);
  font-size: 0.8rem;
}

.nav-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
}

.nav-links a:hover,
.nav-links a.is-active {
  background: rgba(16, 16, 16, 0.06);
  color: var(--ink);
}

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

.hero-actions {
  margin-top: 24px;
}

.hero-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow);
  padding: 24px;
}

.cards-grid,
.app-layout,
.docs-grid,
.two-col,
.stat-grid {
  display: grid;
  gap: 20px;
}

.cards-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-bottom: 20px;
}

.app-layout {
  grid-template-columns: 430px 1fr;
  margin-bottom: 20px;
}

.docs-grid,
.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.stat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 18px;
}

.feature-card,
.endpoint-card,
.stat-card,
.callout,
.code-block {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.feature-card,
.endpoint-card,
.stat-card,
.callout {
  padding: 18px;
}

.code-block pre,
.endpoint-card pre {
  margin: 0;
  overflow: auto;
  padding: 16px;
  border-radius: 14px;
  background: #0f0f10;
  color: #f2f2f2;
  line-height: 1.55;
  font-size: 0.88rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 11px 16px;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button-link:hover {
  transform: translateY(-1px);
}

.primary-button.button-link,
.secondary-button.button-link,
.ghost-button.button-link {
  text-decoration: none;
}

.detail-chip,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(16, 16, 16, 0.06);
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
}

.tag {
  cursor: default;
}

.callout {
  background: #f7f7f5;
}

.stack {
  display: grid;
  gap: 16px;
}

.page-title {
  margin-bottom: 22px;
}

.page-title p,
.doc-copy,
.list-copy {
  color: var(--ink-soft);
  line-height: 1.65;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

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

th {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.footer-note {
  margin-top: 28px;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.docs-home-grid {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.docs-sidebar,
.docs-content,
.module-list,
.tutorial-card,
.use-case-card,
.mini-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.docs-sidebar,
.docs-content {
  padding: 22px;
}

.sidebar-title {
  margin-bottom: 10px;
}

.sidebar-group + .sidebar-group {
  margin-top: 20px;
}

.sidebar-group h3 {
  margin-bottom: 10px;
  font-size: 0.95rem;
}

.sidebar-links,
.module-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.sidebar-links li + li,
.module-links li + li {
  margin-top: 8px;
}

.sidebar-links a,
.module-links a {
  display: block;
  padding: 8px 10px;
  border-radius: 10px;
  color: var(--ink-soft);
  text-decoration: none;
}

.sidebar-links a:hover,
.module-links a:hover {
  background: rgba(16, 16, 16, 0.06);
  color: var(--ink);
}

.doc-section + .doc-section {
  margin-top: 30px;
}

.doc-section h2 {
  margin-bottom: 12px;
}

.doc-section h3 {
  margin-bottom: 10px;
}

.section-intro {
  max-width: 74ch;
  color: var(--ink-soft);
  line-height: 1.7;
}

.module-grid,
.tutorial-grid,
.use-case-grid,
.mini-grid {
  display: grid;
  gap: 18px;
}

.module-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tutorial-grid,
.use-case-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.module-list,
.tutorial-card,
.use-case-card,
.mini-card {
  padding: 18px;
}

.module-list p,
.tutorial-card p,
.use-case-card p,
.mini-card p,
.inline-note {
  color: var(--ink-soft);
  line-height: 1.65;
}

.module-kicker {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  margin-bottom: 8px;
}

.reference-table code,
.code-inline {
  font-family: "IBM Plex Mono", monospace;
}

.equation-panel {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f6f6f4;
  padding: 14px 16px;
  overflow-x: auto;
}

.equation-panel pre {
  margin: 0;
  white-space: pre-wrap;
  line-height: 1.6;
  color: var(--ink);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
}

.formula-block + .formula-block {
  margin-top: 18px;
}

.formula-title {
  margin: 0 0 10px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.equation-panel .mjx-container {
  margin: 0 !important;
}

.doc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 24px;
}

.doc-tab {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--ink);
  padding: 10px 14px;
  border-radius: 999px;
  text-decoration: none;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
}

.doc-tab.is-active,
.doc-tab:hover {
  background: rgba(16, 16, 16, 0.08);
}

.path-block {
  padding: 12px 14px;
  border-radius: 12px;
  background: #0f0f10;
  color: #f2f2f2;
  font-family: "IBM Plex Mono", monospace;
  overflow: auto;
}

.reference-table {
  width: 100%;
  border-collapse: collapse;
}

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

.reference-table th {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
}

.toc-note {
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

@media (max-width: 1080px) {
  .cards-grid,
  .app-layout,
  .docs-grid,
  .two-col,
  .stat-grid,
  .docs-home-grid,
  .module-grid,
  .tutorial-grid,
  .use-case-grid,
  .mini-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-shell {
    width: min(100% - 20px, 1280px);
    padding-top: 16px;
  }

  .site-nav {
    border-radius: 24px;
    align-items: start;
    flex-direction: column;
  }
}