:root {
  --color-bg: #ffffff;
  --color-text: #333333;
  --color-accent: #2563eb;
  --color-sidebar: #f8f9fa;
  --color-card: #ffffff;
  --color-border: #e5e7eb;
  --color-muted: #6b7280;
}

:root[data-theme="dark"] {
  --color-bg: #1a1a2e;
  --color-text: #e0e0e0;
  --color-accent: #60a5fa;
  --color-sidebar: #16213e;
  --color-card: #1f2540;
  --color-border: #2f365f;
  --color-muted: #9ca3af;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-card);
  position: sticky;
  top: 0;
  z-index: 10;
}

.branding a {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-text);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.search-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-form input[type="search"] {
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-sidebar);
  color: var(--color-text);
  min-width: 200px;
}

.search-form-header {
  flex: 1;
  justify-content: center;
}

.search-form-header input[type="search"] {
  width: 100%;
  max-width: 320px;
}

.search-form-page {
  margin: 1.5rem 0;
}

.search-form-page input[type="search"] {
  flex: 1;
  min-width: 0;
}

.theme-toggle,
.link-button,
.primary-button {
  border: 1px solid var(--color-border);
  background: var(--color-sidebar);
  color: var(--color-text);
  padding: 0.5rem 0.9rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.9rem;
}

.primary-button {
  background: var(--color-accent);
  color: #fff;
  border: none;
}

.link-button {
  background: transparent;
}

.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem;
}

.hero {
  margin-bottom: 2rem;
}

.document-section {
  background: var(--color-card);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.summary-card {
  background: var(--color-card);
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 2rem;
}

.summary-content {
  margin-top: 1rem;
}

.summary-actions {
  margin-top: 1.5rem;
  display: grid;
  gap: 1rem;
}

.summary-content h2,
.summary-content h3,
.summary-content h4 {
  margin-top: 1.25rem;
}

.summary-content ul,
.summary-content ol {
  padding-left: 1.25rem;
}

.admin-summary.summary-card {
  max-width: 720px;
  margin: 2rem auto;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

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

.document-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-border);
}

.document-list li:last-child {
  border-bottom: none;
}

.empty-state {
  color: var(--color-muted);
}

.document-header {
  margin-bottom: 1.5rem;
}

.back-link {
  display: inline-block;
  margin-bottom: 0.5rem;
  color: var(--color-muted);
}

.document-layout {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2rem;
}

.toc {
  background: var(--color-sidebar);
  padding: 1rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  position: sticky;
  top: 90px;
  height: fit-content;
}

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

.toc li {
  margin: 0.4rem 0;
}

.toc-level-2 {
  margin-left: 0.5rem;
}

.toc-level-3 {
  margin-left: 1rem;
}

.toc-level-4 {
  margin-left: 1.5rem;
}

.doc-content {
  background: var(--color-card);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
  margin-top: 1.5rem;
}

.markdown-body pre {
  background: var(--color-sidebar);
  padding: 1rem;
  border-radius: 8px;
  overflow: auto;
}

.auth-card {
  max-width: 420px;
  margin: 2rem auto;
  padding: 2rem;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.form {
  display: grid;
  gap: 1rem;
}

.form label {
  display: grid;
  gap: 0.5rem;
  font-weight: 600;
}

.form input[type="text"],
.form input[type="password"],
.form input[type="file"] {
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: var(--color-sidebar);
  color: var(--color-text);
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.alert-success {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.alert-error {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

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

.site-footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-muted);
}

@media (max-width: 900px) {
  .document-layout {
    grid-template-columns: 1fr;
  }

  .toc {
    position: static;
  }

  .site-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
}