/*
 * Copyright 2026 Astro Survey Atlas contributors.
 * Licensed under the Apache License, Version 2.0.
 */

:root {
  color-scheme: light;
  --brand-indigo: #2c3792;
  --brand-indigo-strong: #20286f;
  --brand-magenta: #f01951;
  --brand-magenta-soft: rgba(240, 25, 81, 0.12);
  --accent-cyan: #07859b;
  --accent-green: #25845b;
  --accent-amber: #a96900;
  --accent-purple: #7357a8;
  --ink: #202331;
  --muted: #657083;
  --faint: #8f99aa;
  --surface: #ffffff;
  --surface-raised: #f7f8fb;
  --surface-muted: #eef1f6;
  --line: rgba(42, 52, 79, 0.14);
  --line-strong: rgba(42, 52, 79, 0.24);
  --header: #171922;
  --header-muted: #b9c1d6;
  --code: #16171b;
  --code-ink: #e7edf8;
  --shadow-sm: 0 5px 18px rgba(26, 36, 74, 0.07);
  --shadow-md: 0 16px 36px rgba(26, 36, 74, 0.1);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --content-width: 1180px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #edf1fb;
  --muted: #b1bbce;
  --faint: #8893aa;
  --surface: #151822;
  --surface-raised: #1c2030;
  --surface-muted: #202638;
  --line: rgba(210, 220, 245, 0.14);
  --line-strong: rgba(210, 220, 245, 0.25);
  --brand-indigo: #9ba7ff;
  --brand-indigo-strong: #c0c7ff;
  --brand-magenta-soft: rgba(255, 82, 127, 0.16);
  --accent-cyan: #5bd2df;
  --accent-green: #73d39e;
  --accent-amber: #f0bd5b;
  --accent-purple: #c5a8ed;
  --shadow-sm: 0 5px 18px rgba(0, 0, 0, 0.18);
  --shadow-md: 0 18px 42px rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--surface);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--surface);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 15px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

a {
  color: var(--brand-indigo);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

code,
pre,
.section-tag,
.mode-badge,
.step-number,
.case-stats strong,
.hero-facts strong,
.eyebrow {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  padding: 0.12em 0.32em;
  color: var(--brand-indigo-strong);
  background: var(--surface-muted);
  border-radius: 4px;
  font-size: 0.92em;
}

pre code {
  padding: 0;
  color: inherit;
  background: transparent;
  border-radius: 0;
}

strong {
  font-weight: 700;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 10px;
  left: 10px;
  padding: 8px 12px;
  color: #fff;
  background: var(--brand-magenta);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid rgba(240, 25, 81, 0.45);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  width: 100%;
  color: #fff;
  background: var(--header);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrap {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}

.brand-logo {
  width: 34px;
  height: 34px;
}

.brand-text {
  font-size: 15px;
  font-weight: 750;
  letter-spacing: 0.01em;
}

.brand-badge {
  display: inline-block;
  margin-left: 5px;
  padding: 2px 6px;
  color: #ff9db6;
  border: 1px solid rgba(255, 157, 182, 0.48);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  vertical-align: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 6px 10px;
  color: var(--header-muted);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: transform 160ms ease, color 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

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

.btn-primary {
  color: #fff;
  background: var(--brand-magenta);
  box-shadow: 0 8px 18px rgba(240, 25, 81, 0.2);
}

.btn-primary:hover {
  background: #d90f43;
  box-shadow: 0 10px 22px rgba(240, 25, 81, 0.28);
}

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

.site-header .btn-secondary {
  color: #eef2ff;
  background: transparent;
  border-color: rgba(224, 231, 255, 0.25);
}

.site-header .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(224, 231, 255, 0.45);
}

.btn-sm {
  min-height: 34px;
  padding: 6px 10px;
  font-size: 12px;
}

.doc-wrapper {
  display: grid;
  grid-template-columns: 226px minmax(0, 1fr);
  gap: 48px;
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  position: relative;
}

.sidebar {
  position: sticky;
  top: 96px;
  align-self: start;
  max-height: calc(100vh - 116px);
  padding: 34px 0 44px;
  overflow-y: auto;
}

.sidebar-group + .sidebar-group {
  margin-top: 28px;
}

.sidebar-title {
  padding: 0 10px;
  margin: 0 0 9px;
  color: var(--faint);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

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

.sidebar-item a {
  position: relative;
  display: block;
  padding: 8px 10px 8px 12px;
  color: var(--muted);
  border-left: 2px solid transparent;
  font-size: 12px;
  line-height: 1.35;
  text-decoration: none;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.sidebar-item a:hover,
.sidebar-item a:focus-visible,
.sidebar-item.active > a {
  color: var(--brand-indigo-strong);
  background: var(--brand-magenta-soft);
  border-left-color: var(--brand-magenta);
}

.sidebar-group:not(:first-child) .sidebar-item a {
  color: var(--faint);
}

.sidebar-group:not(:first-child) .sidebar-item a:hover,
.sidebar-group:not(:first-child) .sidebar-item a:focus-visible {
  color: var(--brand-indigo-strong);
}

.main-content {
  min-width: 0;
  max-width: 1000px;
  padding: 56px 1.5rem 100px 0;
}

.doc-section,
.subsection {
  scroll-margin-top: 100px;
}

.doc-section + .doc-section {
  padding-top: 94px;
  margin-top: 94px;
  border-top: 1px solid var(--line);
}

.subsection {
  padding-top: 76px;
}

.section-tag {
  padding: 0;
  margin: 0 0 10px;
  color: var(--brand-magenta);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-tag span {
  color: var(--muted);
}

h1,
h2,
h3,
p {
  max-width: 76ch;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.2;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.02em;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.section-lead {
  max-width: 72ch;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 16px;
}

.hero {
  padding-bottom: 12px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 9px;
  margin-bottom: 18px;
  color: var(--brand-indigo-strong);
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pill-dot {
  width: 7px;
  height: 7px;
  background: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(37, 132, 91, 0.14);
}

.hero-title {
  max-width: 840px;
  margin-bottom: 20px;
  font-size: clamp(36px, 6.5vw, 74px);
  letter-spacing: -0.045em;
}

.hero-title span:last-child {
  color: var(--brand-indigo);
}

.hero-desc {
  max-width: 75ch;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 17px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 36px;
}

.arch-diagram {
  padding: 22px;
  margin-top: 34px;
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.arch-nodes {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) auto minmax(140px, 1fr) auto minmax(120px, 1fr) auto minmax(140px, 1fr);
  align-items: center;
  gap: 12px;
}

.arch-node {
  min-width: 0;
  padding: 15px 12px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.arch-node.highlight-core {
  border-color: rgba(240, 25, 81, 0.5);
  box-shadow: 0 9px 24px rgba(240, 25, 81, 0.1);
}

.arch-node-icon,
.mode-icon,
.card-icon,
.output-icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 9px;
  color: var(--brand-indigo);
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 17px;
  font-weight: 800;
  line-height: 1;
}

.arch-node-icon::before,
.mode-icon::before,
.card-icon::before,
.output-icon::before {
  content: "";
}

.icon-source::before { content: "+"; }
.icon-core::before { content: "*"; }
.icon-moc::before { content: "#"; }
.icon-app::before { content: "@"; }
.icon-document::before { content: "="; }
.icon-grid::before { content: "+"; }
.icon-package::before { content: "[]"; font-size: 10px; }
.icon-image::before { content: "[]"; font-size: 10px; }
.icon-stars::before { content: "*"; }
.icon-tiles::before { content: "+"; }
.icon-region::before { content: "~"; }
.icon-table::before { content: "="; }
.icon-query::before { content: "?"; }
.icon-preview::before { content: "o"; }
.icon-evidence::before { content: "..."; font-size: 11px; }

.arch-node-name,
.arch-node-role {
  margin: 0;
}

.arch-node-name {
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.25;
}

.arch-node-role {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.3;
}

.arch-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--brand-magenta);
}

.arch-arrow-icon {
  width: 28px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.arch-arrow-label {
  max-width: 76px;
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  line-height: 1.2;
  text-align: center;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  padding: 18px 0 0;
  color: var(--muted);
}

.hero-facts span {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border-left: 2px solid var(--line-strong);
  font-size: 12px;
}

.hero-facts strong {
  color: var(--brand-indigo-strong);
  font-size: 11px;
  letter-spacing: 0.04em;
}

.concept-grid,
.grid-3,
.grid-2,
.lab-grid,
.limits-grid,
.artifact-output-grid,
.reading-links {
  display: grid;
  gap: 14px;
}

.concept-grid {
  grid-template-columns: minmax(0, 1.55fr) repeat(2, minmax(150px, 1fr));
  margin-bottom: 24px;
}

.concept-explainer,
.definition-card,
.card,
.mode-card,
.lab-card,
.limit-card,
.output-card,
.calculator-card,
.case-study,
.package-panel {
  position: relative;
  min-width: 0;
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.concept-explainer {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  padding: 18px;
}

.concept-explainer p,
.definition-card p,
.card-desc,
.mode-card p,
.lab-card p,
.limit-card p,
.output-card p,
.case-study p,
.package-panel p {
  color: var(--muted);
  font-size: 13px;
}

.concept-explainer h3,
.definition-card h3,
.card h3,
.mode-card h3,
.lab-card h3,
.limit-card h3,
.output-card h3,
.case-study h3,
.package-panel h3 {
  font-size: 16px;
}

.concept-visual {
  position: relative;
  aspect-ratio: 1.15;
  min-height: 120px;
  overflow: hidden;
  background: #20275f;
  border: 1px solid rgba(157, 170, 255, 0.28);
  border-radius: var(--radius-sm);
}

.sky-cell {
  position: absolute;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(135, 193, 255, 0.45);
  transform: rotate(30deg) skewY(-10deg);
}

.cell-a { top: 15px; left: 19px; background: rgba(84, 190, 214, 0.24); }
.cell-b { top: 15px; left: 58px; background: rgba(240, 25, 81, 0.25); }
.cell-c { top: 15px; left: 97px; background: rgba(255, 195, 74, 0.24); }
.cell-d { top: 48px; left: 39px; background: rgba(84, 190, 214, 0.18); }
.cell-e { top: 48px; left: 78px; background: rgba(84, 190, 214, 0.2); }
.cell-f { top: 81px; left: 19px; background: rgba(240, 25, 81, 0.17); }
.cell-g { top: 81px; left: 58px; background: rgba(84, 190, 214, 0.24); }
.cell-h { top: 81px; left: 97px; background: rgba(255, 195, 74, 0.18); }

.sky-point {
  position: absolute;
  width: 5px;
  height: 5px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.08), 0 0 12px rgba(255, 255, 255, 0.75);
}

.point-a { top: 31px; left: 76px; }
.point-b { top: 92px; left: 47px; }
.point-c { top: 67px; left: 121px; }

.definition-card,
.card,
.mode-card,
.lab-card,
.limit-card,
.output-card {
  padding: 20px;
}

.definition-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.definition-card h3 {
  margin-bottom: 10px;
}

.definition-math {
  padding-top: 14px;
  margin: auto 0 0;
  border-top: 1px solid var(--line);
}

.definition-math code {
  color: var(--brand-magenta);
  background: transparent;
  font-size: 12px;
}

.calculator-card {
  padding: 20px;
  background: var(--surface-muted);
}

.calculator-heading,
.case-study-header,
.package-heading,
.lab-card-heading,
.mode-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.eyebrow {
  padding: 0;
  margin: 0 0 5px;
  color: var(--brand-magenta);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.calculator-heading h3 {
  margin-bottom: 0;
}

.status-pill,
.mode-badge,
.limit-label {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 4px 7px;
  border-radius: 999px;
  font-size: 10px;
  font-weight: 800;
  line-height: 1.2;
}

.status-local,
.limit-supported {
  color: var(--accent-green);
  background: rgba(37, 132, 91, 0.12);
}

.status-simulated,
.limit-caution {
  color: var(--accent-amber);
  background: rgba(169, 105, 0, 0.13);
}

.limit-absent {
  color: var(--brand-magenta);
  background: var(--brand-magenta-soft);
}

.calculator-controls,
.lab-controls,
.split-controls {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
}

.form-label {
  display: flex;
  flex: 1 1 180px;
  flex-direction: column;
  gap: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.compact-input {
  max-width: 170px;
}

.form-input {
  width: 100%;
  min-height: 39px;
  padding: 8px 10px;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
}

.form-input:focus {
  border-color: var(--brand-magenta);
  outline: 3px solid rgba(240, 25, 81, 0.14);
}

.form-note {
  margin: 12px 0 0;
  color: var(--faint);
  font-size: 11px;
}

.calculator-output,
.lab-result {
  min-height: 62px;
  padding: 12px 14px;
  margin-top: 14px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.result-line,
.result-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
}

.result-line strong,
.result-grid strong {
  color: var(--brand-indigo-strong);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.result-line span,
.result-grid span {
  color: var(--muted);
  font-size: 11px;
}

.result-error {
  color: var(--brand-magenta);
  font-size: 12px;
  font-weight: 700;
}

.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.card,
.mode-card,
.lab-card,
.limit-card,
.output-card {
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.card:hover,
.mode-card:hover,
.lab-card:hover,
.limit-card:hover,
.output-card:hover {
  transform: translateY(-3px);
  border-color: rgba(240, 25, 81, 0.48);
  box-shadow: 0 0 0 1px rgba(240, 25, 81, 0.14), 0 15px 30px rgba(240, 25, 81, 0.1);
}

.accent-indigo { border-top: 3px solid var(--brand-indigo); }
.accent-magenta { border-top: 3px solid var(--brand-magenta); }
.accent-cyan { border-top: 3px solid var(--accent-cyan); }

.card-title-with-icon {
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title-with-icon .card-icon {
  flex: 0 0 auto;
  width: 29px;
  height: 29px;
  margin: 0;
  font-size: 13px;
}

.card-foot {
  display: block;
  padding-top: 13px;
  margin-top: 17px;
  color: var(--faint);
  border-top: 1px solid var(--line);
  font-size: 11px;
}

.pipeline-panel {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  margin: 22px 0 34px;
  overflow: hidden;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.pipeline-step {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 134px;
  padding: 16px;
  background: var(--surface-raised);
}

.pipeline-step strong {
  color: var(--ink);
  font-size: 13px;
}

.pipeline-step > span:last-child {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.step-number {
  color: var(--brand-magenta);
  font-size: 11px;
  font-weight: 800;
}

.callout {
  padding: 14px 16px;
  margin-top: 18px;
  color: var(--muted);
  background: var(--surface-muted);
  border-left: 3px solid var(--accent-cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 13px;
}

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

.callout-warning {
  border-left-color: var(--accent-amber);
}

.code-box {
  overflow: hidden;
  margin-top: 16px;
  background: var(--code);
  border: 1px solid #30333d;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 12px;
  color: var(--code-ink);
  background: #20232b;
  border-bottom: 1px solid rgba(220, 228, 242, 0.18);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  color: var(--code-ink);
  background: transparent;
  border: 1px solid rgba(220, 228, 242, 0.34);
  border-radius: 4px;
  cursor: pointer;
  font-family: inherit;
  font-size: 10px;
  font-weight: 700;
}

.copy-btn:hover,
.copy-btn:focus-visible {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.65);
}

.code-content {
  max-width: none;
  padding: 18px;
  margin: 0;
  overflow-x: auto;
  color: var(--code-ink);
  font-size: 12px;
  line-height: 1.7;
  tab-size: 2;
}

.mode-grid {
  margin-bottom: 22px;
}

.mode-card-wide {
  grid-column: 1 / -1;
}

.mode-card-top {
  align-items: center;
  margin-bottom: 4px;
}

.mode-icon {
  width: 32px;
  height: 32px;
  margin: 0;
  color: var(--accent-cyan);
  background: rgba(7, 133, 155, 0.1);
  border-color: rgba(7, 133, 155, 0.22);
}

.mode-badge {
  color: var(--brand-indigo-strong);
  background: var(--surface-muted);
  border: 1px solid var(--line);
  font-size: 10px;
  font-weight: 700;
}

.mode-caveat {
  padding: 9px 10px;
  margin: 14px 0 0;
  background: rgba(169, 105, 0, 0.08);
  border-left: 2px solid var(--accent-amber);
  border-radius: 0 4px 4px 0;
  font-size: 11px !important;
}

.mode-caveat > span:first-child {
  color: var(--accent-amber);
  font-weight: 800;
}

.mode-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.data-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  font-size: 12px;
}

.data-table caption {
  padding: 13px 14px;
  color: var(--muted);
  background: var(--surface-muted);
  font-size: 12px;
  font-weight: 700;
  text-align: left;
}

.data-table th,
.data-table td {
  padding: 11px 13px;
  border-top: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table thead th {
  color: var(--muted);
  background: var(--surface-raised);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.data-table tbody th {
  color: var(--brand-indigo-strong);
  font-weight: 700;
}

.data-table td {
  color: var(--muted);
}

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

.lab-card-wide {
  grid-column: 1 / -1;
}

.lab-card-heading {
  align-items: flex-start;
}

.algorithm-symbol {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  color: var(--brand-magenta);
  background: var(--brand-magenta-soft);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-size: 21px;
}

.lab-card .form-label {
  flex-basis: 220px;
}

.lab-card .split-controls .form-label {
  flex-basis: 100px;
}

.inline-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 17px 0 11px;
  color: var(--faint);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 10px;
  text-transform: uppercase;
}

.inline-divider::before,
.inline-divider::after {
  flex: 1;
  height: 1px;
  content: "";
  background: var(--line);
}

.compact-result {
  min-height: 48px;
}

.algorithm-note {
  display: flex;
  gap: 12px;
  padding: 16px;
  margin-top: 18px;
  background: var(--surface-muted);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.note-mark {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  width: 23px;
  height: 23px;
  color: #fff;
  background: var(--accent-purple);
  border-radius: 50%;
  font-family: Georgia, serif;
  font-weight: 700;
}

.algorithm-note strong {
  color: var(--ink);
  font-size: 13px;
}

.algorithm-note p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.code-box-large {
  margin-bottom: 20px;
}

.artifact-output-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 22px;
}

.output-card {
  padding: 16px;
}

.output-icon {
  width: 30px;
  height: 30px;
  color: var(--accent-cyan);
  background: rgba(7, 133, 155, 0.1);
  border-color: rgba(7, 133, 155, 0.22);
}

.output-card h3 {
  margin-top: 2px;
  font-size: 13px;
}

.output-card p {
  margin-bottom: 0;
  font-size: 11px;
}

.case-study {
  padding: 22px;
  margin-top: 22px;
  background: #20275f;
  border-color: rgba(157, 170, 255, 0.34);
}

.case-study h3,
.case-study p,
.case-study .form-note {
  color: #e9edff;
}

.case-study .eyebrow {
  color: #ff9db6;
}

.case-study .form-note {
  opacity: 0.76;
}

.case-study .status-simulated {
  color: #ffd36f;
  background: rgba(255, 211, 111, 0.15);
}

.case-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 22px 0 4px;
}

.case-stats div {
  padding: 12px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-sm);
}

.case-stats strong,
.case-stats span {
  display: block;
}

.case-stats strong {
  color: #fff;
  font-size: 20px;
}

.case-stats span {
  color: #c7d0ed;
  font-size: 11px;
}

.text-link {
  color: #fff;
  font-size: 12px;
  font-weight: 700;
}

.package-panel {
  padding: 20px;
  margin-top: 22px;
  background: var(--surface-muted);
}

.package-heading {
  align-items: center;
  justify-content: flex-start;
}

.package-heading h3 {
  margin-bottom: 2px;
}

.package-heading p {
  margin-bottom: 0;
}

.package-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  color: #fff;
  background: var(--accent-purple);
  border-radius: var(--radius-sm);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 11px;
  font-weight: 800;
}

.tree-view {
  padding: 14px;
  margin: 18px 0 14px;
  overflow-x: auto;
  color: var(--brand-indigo-strong);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 12px;
  line-height: 1.7;
}

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

.limit-card {
  padding: 17px;
}

.limit-label {
  margin-bottom: 13px;
}

.limit-card p {
  margin-bottom: 0;
  font-size: 12px;
}

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

.reading-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px;
  color: var(--ink);
  background: var(--surface-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease;
}

.reading-link:hover,
.reading-link:focus-visible {
  background: var(--brand-magenta-soft);
  border-color: var(--brand-magenta);
}

.reading-link strong {
  font-size: 12px;
}

.reading-link span:not([aria-hidden]) {
  color: var(--muted);
  font-size: 11px;
}

#copy-status {
  min-height: 20px;
  margin: 20px 0 0;
  color: var(--accent-green);
  font-size: 12px;
  font-weight: 700;
}

.site-footer {
  color: #c4cbe0;
  background: var(--header);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(var(--content-width), calc(100% - 40px));
  padding: 30px 0;
  margin: 0 auto;
  font-size: 12px;
}

.footer-inner p {
  margin: 0;
}

.footer-inner strong {
  color: #fff;
}

.footer-inner a {
  color: #fff;
}

@media (max-width: 1080px) {
  .doc-wrapper {
    grid-template-columns: 198px minmax(0, 1fr);
    gap: 30px;
  }

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

  .arch-arrow {
    flex-direction: row;
    justify-content: center;
    grid-column: 1 / -1;
  }

  .arch-arrow-icon {
    transform: rotate(90deg);
  }

  .arch-arrow-label {
    max-width: none;
  }

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

@media (max-width: 900px) {
  .grid-3,
  .limits-grid,
  .reading-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .concept-explainer {
    grid-column: 1 / -1;
  }

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

@media (max-width: 760px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
  }

  .nav-links {
    justify-content: flex-start;
    flex-wrap: wrap;
  }

  .doc-wrapper {
    display: block;
    width: 100%;
  }

  .sidebar {
    position: static;
    max-height: none;
    padding: 18px 0 0;
  }

  .sidebar-group:first-child .sidebar-list {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
  }

  .sidebar-group:first-child .sidebar-item {
    flex: 1 1 180px;
  }

  .sidebar-group:first-child .sidebar-item a {
    height: 100%;
  }

  .sidebar-group:not(:first-child) {
    display: inline-block;
    width: calc(50% - 8px);
    margin-top: 18px;
    vertical-align: top;
  }

  .main-content {
    padding-top: 42px;
  }

  .hero-title {
    font-size: clamp(36px, 12vw, 58px);
  }

  .hero-desc {
    font-size: 15px;
  }

  .hero-facts,
  .concept-grid,
  .grid-3,
  .grid-2,
  .lab-grid,
  .limits-grid,
  .reading-links {
    grid-template-columns: 1fr;
  }

  .concept-explainer,
  .mode-card-wide,
  .lab-card-wide {
    grid-column: auto;
  }

  .concept-explainer {
    grid-template-columns: 135px minmax(0, 1fr);
  }

  .pipeline-panel,
  .artifact-output-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 500px) {
  .footer-inner {
    width: calc(100% - 28px);
  }

  .nav-link {
    padding-inline: 7px;
    font-size: 11px;
  }

  .site-header .btn-sm {
    min-height: 32px;
    padding-inline: 8px;
  }

  .sidebar-group:not(:first-child) {
    width: 100%;
  }

  .section-tag {
    font-size: 10px;
  }

  h2 {
    font-size: 31px;
  }

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

  .concept-visual {
    width: 160px;
  }

  .calculator-controls,
  .lab-controls,
  .split-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .calculator-controls .btn,
  .lab-controls .btn,
  .split-controls .btn {
    width: 100%;
  }

  .compact-input {
    max-width: none;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* Keep the documentation shell consistent with the other Astro Survey Atlas sites. */
:root {
  --shell-bg-primary: #ffffff;
  --shell-bg-surface: #f5f6fa;
  --shell-border: rgba(30, 40, 70, 0.14);
  --shell-text: #182033;
  --shell-muted: #515d70;
  --shell-dim: #657086;
}

:root[data-theme="dark"] {
  --shell-bg-primary: #111827;
  --shell-bg-surface: #182234;
  --shell-border: rgba(190, 204, 231, 0.18);
  --shell-text: #eef2ff;
  --shell-muted: #bcc7da;
  --shell-dim: #a4b2c9;
}

.site-header {
  z-index: 50;
  width: 100%;
  color: var(--shell-text);
  background: var(--shell-bg-primary);
  border-bottom-color: var(--shell-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand-wrap {
  gap: 0.75rem;
  color: var(--shell-text);
}

.brand-logo {
  width: auto;
  height: 36px;
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-badge {
  margin-left: 0;
  padding: 0.15rem 0.45rem;
  color: var(--brand-magenta);
  background: rgba(240, 25, 81, 0.15);
  border-color: rgba(240, 25, 81, 0.4);
  border-radius: var(--radius-full, 9999px);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0;
}

.nav-links {
  gap: 0.75rem 1rem;
}

.nav-link {
  min-height: 0;
  padding: 0;
  color: var(--shell-muted);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.active {
  color: var(--shell-text);
  background: transparent;
}

.site-header .btn {
  min-height: 0;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
}

.site-header .btn-sm {
  min-height: 0;
  padding: 0.3rem 0.65rem;
  font-size: 0.8rem;
}

.site-header .btn-secondary {
  color: var(--shell-text);
  background: var(--shell-bg-surface);
  border-color: var(--shell-border);
}

.site-header .btn-secondary:hover {
  background: var(--shell-bg-primary);
  border-color: var(--line-strong);
}

.sidebar {
  padding: 1.75rem 1rem 3rem 1.5rem;
  border-right: 1px solid var(--shell-border);
}

.sidebar-group {
  margin-bottom: 1.5rem;
}

.sidebar-group + .sidebar-group {
  margin-top: 0;
}

.sidebar-title {
  padding-left: 0.6rem;
  margin-bottom: 0.6rem;
  color: var(--shell-dim);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.sidebar-list {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.sidebar-item a {
  padding: 0.4rem 0.6rem;
  color: var(--shell-muted);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  line-height: 1.45;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.sidebar-item a:hover,
.sidebar-item a:focus-visible {
  color: var(--shell-text);
  background: rgba(255, 255, 255, 0.04);
}

.sidebar-item.active a {
  color: #ff527b;
  background: rgba(240, 25, 81, 0.08);
  border-left-color: #ff527b;
  font-weight: 500;
}

.sidebar-group:not(:first-child) .sidebar-item a {
  color: var(--shell-dim);
}

.sidebar-group:not(:first-child) .sidebar-item a:hover,
.sidebar-group:not(:first-child) .sidebar-item a:focus-visible {
  color: var(--shell-text);
}

.site-footer {
  padding: 3rem 0;
  color: var(--shell-dim);
  background: var(--shell-bg-surface);
  border-top: 1px solid var(--shell-border);
  font-size: 0.85rem;
}

.footer-inner {
  width: auto;
  max-width: 1440px;
  padding: 0 1.5rem;
}

.footer-inner p {
  color: var(--shell-muted);
}

.footer-inner a {
  color: inherit;
  text-decoration: none;
}

@media (max-width: 760px) {
  .site-header {
    position: relative;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 1rem;
    padding: 1rem;
  }

  .header-inner nav,
  .nav-links {
    width: auto;
  }

  .nav-links {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0.75rem 1rem;
  }

  .sidebar {
    padding: 1rem;
    border-right: 0;
    border-bottom: 1px solid var(--shell-border);
  }

  .sidebar-group {
    margin-bottom: 0;
  }

  .sidebar-group + .sidebar-group {
    display: none;
  }

  .sidebar-list {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .sidebar-item a {
    font-size: 0.8rem;
  }
}

@media (max-width: 600px) {
  .footer-inner {
    align-items: center;
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}