/* ============================================================
   STYLE GUIDE — Shared documentation styles
   Used by all design/themes/*.html pages
   ============================================================ */

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

:root {
  /* Documentation chrome — neutral, stays out of the way */
  --doc-bg: #f6f7f9;
  --doc-surface: #fff;
  --doc-border: #e2e5ea;
  --doc-text: #1a1d23;
  --doc-text-muted: #6b7280;
  --doc-accent: #3b5bdb;
  --doc-accent-hover: #2b4ac9;
  --doc-code-bg: #f1f3f5;
  --doc-radius: 6px;
  --doc-space: 8px;
  --doc-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --doc-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, monospace;
}

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--doc-font);
  line-height: 1.6;
  color: var(--doc-text);
  background: var(--doc-bg);
  -webkit-font-smoothing: antialiased;
}

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

img { max-width: 100%; display: block; }

/* --- Layout --- */
.sg-page {
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--doc-space) * 4) calc(var(--doc-space) * 3);
}

.sg-nav {
  display: flex;
  align-items: center;
  gap: calc(var(--doc-space) * 2);
  padding: calc(var(--doc-space) * 2) calc(var(--doc-space) * 3);
  background: var(--doc-surface);
  border-bottom: 1px solid var(--doc-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.sg-nav a {
  font-size: 0.875rem;
  color: var(--doc-text-muted);
  font-weight: 500;
}
.sg-nav a:hover { color: var(--doc-text); text-decoration: none; }
.sg-nav .sg-nav-active { color: var(--doc-text); }
.sg-nav-brand { font-weight: 700; color: var(--doc-text) !important; letter-spacing: -0.02em; }

/* --- Sections --- */
.sg-section {
  margin-bottom: calc(var(--doc-space) * 8);
}

.sg-section-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: calc(var(--doc-space) * 3);
  padding-bottom: calc(var(--doc-space) * 1.5);
  border-bottom: 2px solid var(--doc-border);
}

.sg-subsection-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: calc(var(--doc-space) * 2);
  color: var(--doc-text);
}

.sg-description {
  color: var(--doc-text-muted);
  max-width: 65ch;
  margin-bottom: calc(var(--doc-space) * 3);
}

/* --- Hero Banner (themed) --- */
.sg-hero {
  border-radius: calc(var(--doc-radius) * 2);
  padding: calc(var(--doc-space) * 8) calc(var(--doc-space) * 6);
  margin-bottom: calc(var(--doc-space) * 6);
  position: relative;
  overflow: hidden;
}

.sg-hero-title {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: calc(var(--doc-space) * 1.5);
}

.sg-hero-subtitle {
  font-size: 1.125rem;
  opacity: 0.7;
  max-width: 50ch;
}

.sg-hero-meta {
  display: flex;
  gap: calc(var(--doc-space) * 2);
  margin-top: calc(var(--doc-space) * 3);
  font-size: 0.8125rem;
  opacity: 0.5;
}

/* --- Color Swatches --- */
.sg-palette {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: calc(var(--doc-space) * 2);
}

.sg-swatch {
  background: var(--doc-surface);
  border: 1px solid var(--doc-border);
  border-radius: var(--doc-radius);
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow 0.15s ease;
}

.sg-swatch:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.sg-swatch-color {
  height: 80px;
  position: relative;
}

.sg-swatch-info {
  padding: calc(var(--doc-space) * 1.5);
}

.sg-swatch-name {
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.sg-swatch-value {
  font-family: var(--doc-mono);
  font-size: 0.75rem;
  color: var(--doc-text-muted);
}

.sg-swatch-copied {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 600;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

.sg-swatch-copied.active { opacity: 1; }

/* --- Swatch Strip (compact, inline) --- */
.sg-swatch-strip {
  display: flex;
  border-radius: var(--doc-radius);
  overflow: hidden;
  height: 40px;
}
.sg-swatch-strip > div {
  flex: 1;
  position: relative;
}
.sg-swatch-strip > div::after {
  content: attr(data-hex);
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--doc-mono);
  font-size: 0.5625rem;
  opacity: 0;
  transition: opacity 0.15s;
  white-space: nowrap;
}
.sg-swatch-strip:hover > div::after { opacity: 0.8; }

/* --- Typography Specimen --- */
.sg-type-specimen {
  padding: calc(var(--doc-space) * 4);
  border: 1px solid var(--doc-border);
  border-radius: var(--doc-radius);
  margin-bottom: calc(var(--doc-space) * 2);
}

.sg-type-scale {
  display: flex;
  flex-direction: column;
  gap: calc(var(--doc-space) * 2);
}

.sg-type-row {
  display: flex;
  align-items: baseline;
  gap: calc(var(--doc-space) * 3);
}

.sg-type-label {
  flex-shrink: 0;
  width: 80px;
  font-family: var(--doc-mono);
  font-size: 0.75rem;
  color: var(--doc-text-muted);
}

.sg-type-sample {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* --- Component Showcase --- */
.sg-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: calc(var(--doc-space) * 3);
}

.sg-component-card {
  border: 1px solid var(--doc-border);
  border-radius: var(--doc-radius);
  overflow: hidden;
}

.sg-component-preview {
  padding: calc(var(--doc-space) * 4);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 120px;
}

.sg-component-label {
  padding: calc(var(--doc-space) * 1.5) calc(var(--doc-space) * 2);
  background: var(--doc-code-bg);
  border-top: 1px solid var(--doc-border);
  font-size: 0.8125rem;
  font-weight: 500;
}

/* --- Code Blocks --- */
.sg-code {
  background: #1e1e2e;
  color: #cdd6f4;
  border-radius: var(--doc-radius);
  overflow: hidden;
  margin-bottom: calc(var(--doc-space) * 3);
}

.sg-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(var(--doc-space) * 1) calc(var(--doc-space) * 2);
  background: rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.sg-code-lang {
  font-family: var(--doc-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #a6adc8;
}

.sg-code-copy {
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  padding: 4px 10px;
  color: #a6adc8;
  font-size: 0.75rem;
  cursor: pointer;
  font-family: var(--doc-font);
  transition: background 0.15s, color 0.15s;
}
.sg-code-copy:hover { background: rgba(255, 255, 255, 0.1); color: #cdd6f4; }

.sg-code pre {
  padding: calc(var(--doc-space) * 2);
  overflow-x: auto;
  font-family: var(--doc-mono);
  font-size: 0.8125rem;
  line-height: 1.65;
  tab-size: 2;
}

/* Minimal syntax coloring */
.sg-code .kw { color: #cba6f7; }   /* keyword */
.sg-code .str { color: #a6e3a1; }  /* string */
.sg-code .num { color: #fab387; }  /* number */
.sg-code .cmt { color: #585b70; }  /* comment */
.sg-code .prop { color: #89b4fa; } /* property */
.sg-code .val { color: #f9e2af; }  /* value */
.sg-code .fn { color: #89dceb; }   /* function */
.sg-code .sel { color: #f38ba8; }  /* selector */

/* --- Do / Don't --- */
.sg-dodont {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: calc(var(--doc-space) * 3);
}

.sg-do, .sg-dont {
  border-radius: var(--doc-radius);
  overflow: hidden;
}

.sg-do-header, .sg-dont-header {
  padding: calc(var(--doc-space) * 1) calc(var(--doc-space) * 2);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sg-do-header { background: #d3f9d8; color: #087f23; }
.sg-dont-header { background: #ffe3e3; color: #c92a2a; }

.sg-do-body, .sg-dont-body {
  padding: calc(var(--doc-space) * 2);
  border: 1px solid var(--doc-border);
  border-top: none;
  border-radius: 0 0 var(--doc-radius) var(--doc-radius);
}

.sg-do-body ul, .sg-dont-body ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: calc(var(--doc-space) * 1);
}

.sg-do-body li::before { content: "\2713 "; color: #087f23; font-weight: 700; }
.sg-dont-body li::before { content: "\2717 "; color: #c92a2a; font-weight: 700; }

/* --- Project Links --- */
.sg-projects {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--doc-space) * 1.5);
}

.sg-project-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--doc-code-bg);
  border: 1px solid var(--doc-border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--doc-text);
  transition: border-color 0.15s;
}
.sg-project-chip:hover { border-color: var(--doc-accent); text-decoration: none; }

/* --- Spacing Grid Demo --- */
.sg-spacing-grid {
  display: flex;
  align-items: flex-end;
  gap: calc(var(--doc-space) * 2);
}

.sg-spacing-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.sg-spacing-visual {
  background: var(--doc-accent);
  opacity: 0.2;
  border-radius: 2px;
  width: 48px;
}

.sg-spacing-label {
  font-family: var(--doc-mono);
  font-size: 0.6875rem;
  color: var(--doc-text-muted);
}

/* --- Filter Chips (Gallery) --- */
.sg-filters {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--doc-space) * 1);
  margin-bottom: calc(var(--doc-space) * 4);
}

.sg-filter-chip {
  padding: 6px 16px;
  border: 1px solid var(--doc-border);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  background: var(--doc-surface);
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--doc-text-muted);
}

.sg-filter-chip:hover { border-color: var(--doc-accent); color: var(--doc-accent); }
.sg-filter-chip.active {
  background: var(--doc-accent);
  border-color: var(--doc-accent);
  color: #fff;
}

/* --- Gallery Cards --- */
.sg-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: calc(var(--doc-space) * 3);
}

.sg-theme-card {
  background: var(--doc-surface);
  border: 1px solid var(--doc-border);
  border-radius: calc(var(--doc-radius) * 2);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.sg-theme-card:hover {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
  text-decoration: none;
}

.sg-theme-card-preview {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.sg-theme-card-body {
  padding: calc(var(--doc-space) * 2.5);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.sg-theme-card-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.sg-theme-card-mood {
  font-size: 0.8125rem;
  color: var(--doc-text-muted);
  margin-bottom: calc(var(--doc-space) * 2);
}

.sg-theme-card-projects {
  font-size: 0.75rem;
  color: var(--doc-text-muted);
  margin-top: auto;
  padding-top: calc(var(--doc-space) * 1.5);
  border-top: 1px solid var(--doc-border);
}

/* --- Variant Tabs --- */
.sg-variant-tabs {
  display: flex;
  gap: 2px;
  background: var(--doc-code-bg);
  border-radius: var(--doc-radius);
  padding: 3px;
  margin-bottom: calc(var(--doc-space) * 3);
}

.sg-variant-tab {
  padding: 8px 20px;
  border-radius: calc(var(--doc-radius) - 2px);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--doc-text-muted);
  transition: all 0.15s;
  font-family: var(--doc-font);
}
.sg-variant-tab:hover { color: var(--doc-text); }
.sg-variant-tab.active {
  background: var(--doc-surface);
  color: var(--doc-text);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* --- Variant Content Panels --- */
.sg-variant-panel { display: none; }
.sg-variant-panel.active { display: block; }

/* --- Responsive --- */
@media (max-width: 768px) {
  .sg-page { padding: calc(var(--doc-space) * 2); }
  .sg-hero { padding: calc(var(--doc-space) * 4) calc(var(--doc-space) * 3); }
  .sg-hero-title { font-size: 1.75rem; }
  .sg-gallery { grid-template-columns: 1fr; }
  .sg-palette { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); }
  .sg-dodont { grid-template-columns: 1fr; }
  .sg-type-row { flex-direction: column; gap: 4px; }
  .sg-type-label { width: auto; }
  .sg-nav { flex-wrap: wrap; gap: var(--doc-space); }
}

@media (max-width: 480px) {
  .sg-showcase { grid-template-columns: 1fr; }
}

/* --- Print --- */
@media print {
  .sg-nav { display: none; }
  .sg-hero { page-break-after: always; }
  .sg-code-copy { display: none; }
}

/* --- Utility Classes --- */
.sg-mt-0 { margin-top: 0; }
.sg-mt-2 { margin-top: calc(var(--doc-space) * 2); }
.sg-mt-4 { margin-top: calc(var(--doc-space) * 4); }
.sg-mb-2 { margin-bottom: calc(var(--doc-space) * 2); }
.sg-mb-4 { margin-bottom: calc(var(--doc-space) * 4); }
.sg-text-muted { color: var(--doc-text-muted); }
.sg-text-mono { font-family: var(--doc-mono); }
.sg-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: calc(var(--doc-space) * 3); }
.sg-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: calc(var(--doc-space) * 3); }
@media (max-width: 768px) {
  .sg-grid-2, .sg-grid-3 { grid-template-columns: 1fr; }
}