/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #ffffff;
  --color-surface: #f8f9fa;
  --color-border: #e1e4e8;
  --color-primary: #0969da;
  --color-primary-dark: #0550ae;
  --color-text: #24292f;
  --color-text-muted: #57606a;
  --color-code-bg: #f6f8fa;
  --color-accent: #2da44e;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, "Liberation Mono", monospace;
  --max-width: 1200px;
  --radius: 6px;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* External link icon */

a[target="_blank"]:not(.btn):not(.no-ext-icon):not([style*="text-decoration:none"])::after {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-left: 3px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 16 16'%3E%3Cpath fill='%2357606a' d='M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.6;
  flex-shrink: 0;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header / Nav */
.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 14px 0;
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-logo-link,
.site-logo-link:hover {
  text-decoration: none;
}

.site-logo-link {
  display: inline-flex;
  align-items: center;
}

.site-logo-link.nav-link-current {
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 2px;
}

.site-logo .ext {
  color: var(--color-primary);
}

.project-page .page-content h1 {
  font-size: 34px;
  margin-bottom: 10px;
}

.project-page .page-content h2 {
  margin-top: 34px;
  margin-bottom: 10px;
  font-size: 28px;
}

.project-page .page-content h3 {
  margin-top: 8px;
  margin-bottom: 8px;
}

.project-page .page-content p {
  max-width: 920px;
  color: var(--color-text-muted);
}

.project-page .page-content ul {
  margin: 10px 0 18px 20px;
  max-width: 920px;
}

.project-page .page-content li {
  margin-bottom: 4px;
  color: var(--color-text-muted);
}

.project-diagram-wrap {
  width: 100%;
  margin-top: 10px;
}

.diagram-host {
  width: 100%;
  min-height: 680px;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
}

.project-diagram-wrap .mxgraph {
  width: 100% !important;
  max-width: 100% !important;
}

.project-diagram-wrap .mxgraph > div {
  width: 100% !important;
  max-width: 100% !important;
}

.project-diagram-wrap .mxgraph svg {
  width: 100% !important;
  height: auto !important;
  max-width: 100% !important;
  display: block;
}

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

.table-wide {
  min-width: 840px;
}

.table-wide.table-wide-lg {
  min-width: 860px;
}

.spec-table .table-section {
  background: #f6f8fa;
  font-weight: 700;
}

.problem-page .page-content h1 {
  font-size: 34px;
  margin-bottom: 10px;
}

.problem-page .page-content h2 {
  margin-top: 34px;
  margin-bottom: 10px;
  font-size: 28px;
}

.problem-page .page-content h3 {
  margin-top: 22px;
  margin-bottom: 8px;
  font-size: 20px;
}

.problem-page .page-content p {
  max-width: 900px;
  color: var(--color-text-muted);
}

.problem-page .page-content ul {
  margin: 10px 0 18px 20px;
  max-width: 900px;
}

.problem-page .page-content li {
  margin-bottom: 4px;
  color: var(--color-text-muted);
}

.table-wide-xl {
  min-width: 920px;
}

.table-compare th:not(:first-child) {
  text-align: center;
}

.table-compare td:not(:first-child) {
  text-align: center;
  font-size: 22px;
}

.table-legend {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 10px;
}

.site-nav {
  display: flex;
  gap: 24px;
  list-style: none;
  align-items: center;
}

.site-nav a {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 4px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}

.site-nav a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.site-nav .nav-group {
  position: relative;
}

.site-nav .nav-group > summary {
  list-style: none;
  cursor: pointer;
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.site-nav .nav-group > summary::marker {
  content: "";
}

.site-nav .nav-group > summary::-webkit-details-marker {
  display: none;
}

.site-nav .nav-group > summary::after {
  content: "\25BE";
  font-size: 15px;
  font-weight: 700;
  color: #57606a;
  line-height: 1;
}

.site-nav .nav-group[open] > summary,
.site-nav .nav-group-current > summary {
  color: var(--color-text);
}

.site-nav .nav-menu {
  display: none;
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  min-width: 220px;
  padding: 8px;
  margin: 0;
  list-style: none;
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(31, 35, 40, 0.12);
  z-index: 200;
}

.site-nav .nav-group[open] .nav-menu {
  display: block;
}

.site-nav .nav-menu li + li {
  margin-top: 2px;
}

.site-nav .nav-menu a {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--color-text-muted);
}

.site-nav .nav-menu a:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.site-nav .nav-link-current {
  color: var(--color-primary);
  font-weight: 700;
  border-bottom-color: var(--color-primary);
}

.site-nav .nav-menu .nav-link-current {
  background: #ddf4ff;
  border-bottom-color: transparent;
}

.site-nav > li > a[href*="MDZip-spec"] {
  color: var(--color-primary);
  font-weight: 600;
}

.site-nav > li > a[href*="MDZip-spec"]:hover {
  color: var(--color-primary-dark);
}

/* Hero */
.hero {
  padding: 80px 0 64px;
  text-align: center;
  background: linear-gradient(180deg, #f6f8fa 0%, #ffffff 100%);
  border-bottom: 1px solid var(--color-border);
}

.hero-badge {
  display: inline-block;
  background: #ddf4ff;
  color: #0550ae;
  border: 1px solid #b6e3ff;
  border-radius: 2em;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-text);
  margin-bottom: 16px;
}

.hero h1 .ext {
  color: var(--color-primary);
}

.hero-subtitle {
  font-size: 20px;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  text-decoration: none;
  color: #ffffff;
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface);
  text-decoration: none;
}

/* Sections */
section {
  padding: 64px 0;
}

section + section {
  border-top: 1px solid var(--color-border);
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 8px;
}

h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 12px;
}

h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

.section-intro {
  font-size: 18px;
  color: var(--color-text-muted);
  max-width: 680px;
  margin-bottom: 40px;
}

.md-page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 16px 0 24px;
}

.md-page-actions.md-page-actions-center {
  justify-content: center;
}

.subnav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 8px 0 22px;
  align-items: center;
}

.subnav-link {
  color: var(--color-text-muted);
  font-size: 14px;
  font-weight: 600;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.subnav-link:hover {
  color: var(--color-text);
  text-decoration: none;
}

.subnav-link.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.subnav-wrap {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.subnav.subnav-demos {
  margin-top: 10px;
  margin-bottom: 10px;
}

.subnav.subnav-demos {
  padding-left: 0;
}

.quick-steps {
  max-width: 760px;
  margin: 0 0 24px;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: #ddf4ff;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 13px;
}

.step-arrow {
  color: var(--color-primary);
  font-weight: 800;
  font-size: 16px;
  margin: 0 4px;
}

.proof-point {
  max-width: 760px;
  margin: 6px 0 22px;
  color: var(--color-text-muted);
  background: #f6f8fa;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 12px 14px;
  line-height: 1.6;
}

.proof-point strong {
  color: var(--color-text);
  display: block;
  margin-bottom: 4px;
  font-weight: 700;
}

.mdz-files-figure {
  float: right;
  max-width: 300px;
  margin: 2px 0 12px 24px;
  padding: 0;
}

.mdz-files-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.mdz-files-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--color-text-muted);
}

@media (max-width: 720px) {
  .mdz-files-figure {
    float: none;
    max-width: 100%;
    margin: 10px 0 18px;
  }
}

.quick-emphasis {
  color: var(--color-primary);
  font-weight: 700;
}

.hover-term {
  color: var(--color-primary);
  border-bottom: 1px dotted currentColor;
  cursor: help;
}

.pack-header {
  margin: 12px auto 22px;
  text-align: center;
}

.pack-header h1 {
  font-size: 22px;
  margin-bottom: 6px;
}

.pack-header p {
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
  font-size: 14px;
}

.pack-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.subnav.subnav-demos .subnav-link {
  font-size: 13px;
}

.contribute-page .callout {
  background: #ddf4ff;
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 14px 18px;
  font-size: 15px;
  margin-bottom: 32px;
  color: var(--color-text);
}

.contribute-page .callout code {
  background: rgba(9, 105, 218, 0.1);
  border-color: rgba(9, 105, 218, 0.2);
}

.contribute-page .page-content h3 {
  font-size: 18px;
  margin-top: 40px;
  margin-bottom: 10px;
}

.contribute-page .page-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  max-width: 680px;
}

.contribute-page .page-content p code,
.contribute-page .page-content li code {
  color: var(--color-text);
}

.contribute-page .page-content ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.contribute-page .page-content li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.contribute-page .section-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 56px 0 0;
}

.contribute-page .usecase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.contribute-page .usecase-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.contribute-page .usecase-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--color-text);
}

.contribute-page .usecase-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0;
  max-width: none;
}

.contribute-page .usecase-icon {
  font-size: 28px;
  margin-bottom: 12px;
  line-height: 1;
}

.contribute-page .project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.contribute-page .project-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  justify-content: flex-start;
  position: relative;
}

.contribute-page .project-card .project-tag {
  display: inline-block;
  background: #f0fff4;
  color: var(--color-accent);
  border: 1px solid #aef0be;
  border-radius: 2em;
  position: absolute;
  top: 16px;
  right: 16px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 10px;
  width: fit-content;
}

.contribute-page .project-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0;
}

.contribute-page .project-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
  max-width: none;
}

.contribute-page .project-card .project-detail {
  font-size: 13px;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
  padding-top: 10px;
  margin-top: 4px;
  font-style: italic;
}

.contribute-page .project-icon {
  margin-bottom: 10px;
  display: flex;
  gap: 6px;
  align-items: center;
}

.contribute-page .project-icon img {
  width: 32px;
  height: 32px;
  border-radius: 6px;
  border: none;
  background: transparent;
}

.contribute-page .project-icon img.icon-mark {
  width: auto;
  height: 32px;
  object-fit: contain;
}

.contribute-page .project-icon .icon-emoji {
  font-size: 28px;
  line-height: 1;
}

.contribute-page .project-icon .icon-terminal {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #0969da;
  line-height: 1;
}

.contribute-page .tool-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.contribute-page .tool-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

.contribute-page .tool-list img {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  flex-shrink: 0;
  margin-top: 1px;
}

.contribute-page .project-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.contribute-page .project-status::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--color-border);
}

.contribute-page .project-status.status-in-progress {
  color: #9a6700;
}

.contribute-page .project-status.status-in-progress::before {
  background: #d29922;
}

.contribute-page .project-status.status-live {
  color: #1a7f37;
}

.contribute-page .project-status.status-live::before {
  background: var(--color-accent);
}

.contribute-page .project-status a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Feature grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Code block */
.code-block {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  margin: 24px 0;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--color-border);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  margin: 0;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text);
}

/* Structure diagram */
.structure-diagram {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 32px;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.8;
  margin: 24px 0;
}

.structure-diagram .tree-root {
  font-weight: 700;
  color: var(--color-primary);
}

.structure-diagram .tree-dir {
  color: var(--color-accent);
  font-weight: 600;
}

.structure-diagram .tree-file {
  color: var(--color-text);
}

.structure-diagram .tree-comment {
  color: var(--color-text-muted);
}

/* Two-column layout */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 700px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}

/* Steps list */
.steps {
  counter-reset: steps;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.steps li {
  counter-increment: steps;
  display: flex;
  gap: 16px;
}

.steps li::before {
  content: counter(steps);
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
}

.steps li p {
  font-size: 15px;
}

.steps li strong {
  display: block;
  margin-bottom: 2px;
}

/* Table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  margin: 24px 0;
}

.spec-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  font-weight: 600;
  color: var(--color-text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.spec-table td {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  vertical-align: top;
  line-height: 1.5;
}

.spec-table tr:nth-child(even) td {
  background: var(--color-surface);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 5px;
}

/* Copy button */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 4px;
  color: var(--color-text-muted);
  font-size: 11px;
  font-family: var(--font-sans);
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  white-space: nowrap;
}

.copy-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
  border-color: var(--color-border);
}

.copy-btn.copied {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* CTA Banner */
.cta-banner {
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius);
  padding: 48px 40px;
  text-align: center;
}

.cta-banner h2 {
  color: #ffffff;
  margin-bottom: 12px;
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.btn-white {
  background: #ffffff;
  color: var(--color-primary);
  border: 1px solid #ffffff;
}

.btn-white:hover {
  background: #f0f6fc;
  border-color: #f0f6fc;
  text-decoration: none;
  color: var(--color-primary);
}

.btn-outline-white {
  background: transparent;
  color: #ffffff;
  border: 1px solid rgba(255,255,255,0.5);
}

.btn-outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #ffffff;
  text-decoration: none;
  color: #ffffff;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

.site-footer .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.site-footer a {
  color: var(--color-text-muted);
}

.site-footer a:hover {
  color: var(--color-text);
}

.site-footer .footer-content {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  grid-template-areas:
    "brand nav links"
    "disclaimer disclaimer disclaimer";
  align-items: center;
  gap: 16px;
  width: 100%;
}

.site-footer .footer-brand {
  grid-area: brand;
}

.site-footer .footer-flow-nav {
  grid-area: nav;
}

.site-footer .footer-disclaimer {
  grid-area: disclaimer;
  grid-column: 1 / -1;
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  max-width: 900px;
  margin: 0 auto;
}

.site-footer .footer-links {
  grid-area: links;
  justify-self: end;
  display: inline-flex;
  gap: 20px;
  list-style: none;
}


.flow-nav {
  margin: 0;
  padding: 0;
  border-top: none;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--color-text-muted);
}

.flow-nav a {
  color: var(--color-primary);
  font-weight: 600;
}

.flow-nav a:hover {
  color: var(--color-primary-dark);
  text-decoration: none;
}

.footer-flow-nav {
  margin: 0 auto;
}

.footer-flow-nav span {
  display: inline-flex;
  justify-content: center;
  min-width: 140px;
}

.flow-current {
  color: var(--color-text-muted);
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* Markdown-rendered pages */
.md-page-wrap {
  padding: 34px 0 50px;
}

.md-page-content {
  max-width: 960px;
}

.md-page-content.md-page-content-compact {
  max-width: 920px;
}

.md-page-content h1 {
  font-size: 34px;
  margin-bottom: 12px;
}

.md-page-content h2 {
  font-size: 28px;
  margin: 30px 0 10px;
}

.md-page-content h3 {
  font-size: 22px;
  margin: 24px 0 8px;
}

.md-page-content p,
.md-page-content li,
.md-page-content blockquote {
  color: var(--color-text-muted);
  line-height: 1.7;
}

.md-page-content ul,
.md-page-content ol {
  margin: 8px 0 16px 20px;
}

.md-page-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0 18px;
  font-size: 14px;
}

.md-page-content th,
.md-page-content td {
  border: 1px solid var(--color-border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}

.md-page-content th {
  background: #f6f8fa;
  color: var(--color-text);
}

.md-page-content pre {
  overflow-x: auto;
  background: #f6f8fa;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 12px;
  margin: 12px 0 16px;
}

.md-page-content code {
  background: #f6f8fa;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 0.92em;
}

.md-page-content pre code {
  border: none;
  background: transparent;
  padding: 0;
}

.md-page-note {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.md-page-error {
  border: 1px solid #ff8182;
  background: #ffebe9;
  color: #cf222e;
  border-radius: 6px;
  padding: 10px 12px;
  max-width: 960px;
  margin-top: 10px;
}

.md-page-error.md-page-error-compact {
  max-width: 920px;
}

/* Spec page */
.spec-nav {
  position: sticky;
  top: 61px;
  max-height: calc(100vh - 80px);
  overflow-y: auto;
  padding-right: 8px;
}

.spec-nav ul {
  list-style: none;
  border-left: 2px solid var(--color-border);
  padding-left: 16px;
}

.spec-nav ul ul {
  margin-top: 4px;
  margin-left: 12px;
  border-left-width: 1px;
}

.spec-nav a {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  padding: 3px 0;
}

.spec-nav a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.spec-nav .nav-section {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-top: 16px;
  margin-bottom: 4px;
}

.spec-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  padding-top: 40px;
}

@media (max-width: 800px) {
  .spec-layout {
    grid-template-columns: 1fr;
  }
  .spec-nav {
    display: none;
  }
}

.spec-content h2 {
  font-size: 26px;
  margin-top: 48px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.spec-content h2:first-child {
  margin-top: 0;
}

.spec-content h3 {
  font-size: 18px;
  margin-top: 28px;
  margin-bottom: 8px;
}

.spec-content p {
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.7;
}

.spec-content ul, .spec-content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.spec-content li {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 4px;
}

.spec-content .note {
  background: #ddf4ff;
  border-left: 4px solid #0969da;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px;
  font-size: 14px;
  margin: 20px 0;
}

.spec-content .warning {
  background: #fff8c5;
  border-left: 4px solid #d29922;
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 12px 16px;
  font-size: 14px;
  margin: 20px 0;
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 34px;
  }

  .hero-subtitle {
    font-size: 16px;
  }

  h2 {
    font-size: 24px;
  }

  .site-header .container {
    flex-wrap: wrap;
    gap: 8px;
  }

  .site-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    font-size: 13px;
  }

  .site-nav .nav-group {
    width: 100%;
  }

  .site-nav .nav-group > summary {
    width: 100%;
    padding: 6px 0;
  }

  .site-nav .nav-menu {
    position: static;
    display: block;
    min-width: 0;
    width: 100%;
    margin-top: 4px;
    box-shadow: none;
    border-radius: 8px;
  }

  .features-grid[style*="repeat(4"] {
    grid-template-columns: repeat(2, 1fr) !important;
  }
}

@media (max-width: 400px) {
  .features-grid[style*="repeat(4"] {
    grid-template-columns: 1fr !important;
  }
}