/* ============================================
   Components — Cards, Buttons, Tables, etc.
   ============================================ */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
  border: none;
  font-family: inherit;
  line-height: 1;
}

.btn-primary {
  background: var(--color-text);
  color: var(--color-text-inverse);
}

.btn-primary:hover {
  opacity: 0.85;
  color: var(--color-text-inverse);
}

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

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

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 2rem 0;
}

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

.feature-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
}

.feature-card-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
  display: block;
}

.feature-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 8px;
  padding: 0;
  border: none;
  color: var(--color-text);
}

.feature-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.feature-card a {
  font-size: 0.825rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.feature-card a::after {
  content: "→";
}

/* Hero section */
.hero {
  text-align: center;
  padding: 80px 0 48px;
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero .tagline {
  font-size: 1.2rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

/* Hero code preview */
.hero-code {
  margin: 48px auto 0;
  max-width: 580px;
  text-align: left;
}

.hero-code pre {
  border: 1px solid var(--color-border);
}

/* Section headers */
.section-header {
  text-align: center;
  margin: 64px 0 32px;
}

.section-header h2 {
  border: none;
  padding: 0;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-header p {
  max-width: 500px;
  margin: 8px auto 0;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

th {
  text-align: left;
  font-weight: 600;
  color: var(--color-text);
  padding: 10px 16px;
  border-bottom: 2px solid var(--color-border);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border-light);
  color: var(--color-text-secondary);
  vertical-align: top;
}

tr:last-child td {
  border-bottom: none;
}

/* Callouts / Admonitions */
.callout {
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin: 1.5rem 0;
  border-left: 3px solid;
  font-size: 0.9rem;
}

.callout-title {
  font-weight: 600;
  font-size: 0.85rem;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.callout p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

.callout-info {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
}
.callout-info .callout-title { color: var(--color-accent); }

.callout-tip {
  background: #f0fdf4;
  border-color: var(--color-success);
}
.callout-tip .callout-title { color: var(--color-success); }

[data-theme="dark"] .callout-tip {
  background: #052e16;
}

.callout-warning {
  background: #fffbeb;
  border-color: var(--color-warning);
}
.callout-warning .callout-title { color: var(--color-warning); }

[data-theme="dark"] .callout-warning {
  background: #451a03;
}

.callout-danger {
  background: #fef2f2;
  border-color: var(--color-error);
}
.callout-danger .callout-title { color: var(--color-error); }

[data-theme="dark"] .callout-danger {
  background: #450a0a;
}

/* Tabs */
.tabs {
  margin: 1.5rem 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.tab-buttons {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.tab-btn {
  padding: 10px 20px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--color-text);
}

.tab-btn.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
  background: var(--color-bg);
}

.tab-panel {
  display: none;
  padding: 0;
}

.tab-panel.active {
  display: block;
}

.tab-panel pre {
  margin: 0;
  border-radius: 0;
}

.tab-panel pre code {
  border-radius: 0;
}

/* Code copy button */
.code-block-wrapper {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.6);
  padding: 4px 8px;
  border-radius: 4px;
  font-size: 0.7rem;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition-fast);
  opacity: 0;
}

pre:hover .copy-btn,
.code-block-wrapper:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.9);
}

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

/* Architecture diagram */
.architecture-diagram {
  margin: 2rem 0;
}

.architecture-diagram pre {
  font-size: 0.78rem;
  line-height: 1.5;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  margin-top: 64px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
}

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

.footer-list li {
  margin-bottom: 8px;
}

.footer-list a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

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

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
}

/* Anchor links within headings */
h2 a.header-anchor,
h3 a.header-anchor,
h4 a.header-anchor {
  color: var(--color-text-tertiary);
  text-decoration: none;
  opacity: 0;
  margin-left: 4px;
  transition: opacity var(--transition-fast);
}

h2:hover a.header-anchor,
h3:hover a.header-anchor,
h4:hover a.header-anchor {
  opacity: 1;
}

h2 a.header-anchor:hover,
h3 a.header-anchor:hover,
h4 a.header-anchor:hover {
  color: var(--color-accent);
}