@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,wght@0,400;0,500;0,600;0,700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --bg: #faf9f7;
  --bg-raised: #fff;
  --bg-code: #f0efed;
  --text: #1a1a1a;
  --text-secondary: #6b6560;
  --text-tertiary: #9e9892;
  --border: #e5e2de;
  --border-light: #edeae6;
  --accent: #1a6b4a;
  --accent-hover: #145838;
  --accent-bg: #e8f5ee;
  --nav-active: #1a1a1a;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.08);
  --radius: 8px;
  --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141311;
    --bg-raised: #1c1b18;
    --bg-code: #222119;
    --text: #e8e5e0;
    --text-secondary: #9e9892;
    --text-tertiary: #6b6560;
    --border: #2e2c28;
    --border-light: #252320;
    --accent: #4aba85;
    --accent-hover: #5ecf98;
    --accent-bg: #1a2e22;
    --nav-active: #e8e5e0;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.4);
  }
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  max-width: 960px;
  margin: 0 auto;
  padding: 3em 2em 4em;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */

h1 {
  font-size: 1.75em;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.15em;
}

h1 a {
  color: inherit;
  text-decoration: none;
}

.subtitle {
  font-size: 0.9em;
  color: var(--text-secondary);
  margin-bottom: 0.3em;
  line-height: 1.6;
}

.subtitle:last-of-type {
  margin-bottom: 0;
}

.subtitle a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.subtitle a:hover {
  border-bottom-color: var(--accent);
}

.subtitle code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: var(--bg-code);
  padding: 0.15em 0.4em;
  border-radius: 4px;
}

/* ── Nav ── */

nav {
  display: flex;
  gap: 0;
  margin: 2em 0 2.5em;
  border-bottom: 1px solid var(--border);
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85em;
  font-weight: 500;
  padding: 0.6em 1em;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
}

nav a:hover {
  color: var(--text);
}

nav a.active {
  color: var(--nav-active);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

/* ── Sections ── */

h2 {
  font-size: 1.15em;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 2.5em 0 0.4em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--border-light);
}

h2:first-of-type {
  margin-top: 0;
}

h3 {
  font-size: 1em;
  font-weight: 600;
  color: var(--text);
  margin: 1.5em 0 0.4em;
}

.section-desc {
  font-size: 0.82em;
  color: var(--text-tertiary);
  margin-bottom: 1.2em;
}

.coming-soon {
  font-size: 0.82em;
  color: var(--text-tertiary);
  font-style: italic;
  margin-bottom: 1em;
}

/* ── Flag Grid ── */

.flags {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 0.5em;
}

.flag-item {
  text-align: center;
  padding: 1em 0.5em;
  border-radius: var(--radius);
  transition: background 0.15s, box-shadow 0.15s, transform 0.15s;
  cursor: default;
}

.flag-item:hover {
  background: var(--bg-raised);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.flag-item img {
  display: block;
  margin: 0 auto 0.5em;
  max-width: 100%;
  height: auto;
}

.flag-item img.circle {
  border-radius: 50%;
}

.flag-name {
  font-size: 0.78em;
  font-weight: 500;
  line-height: 1.3;
}

.flag-code {
  font-size: 0.72em;
  color: var(--text-tertiary);
  font-family: 'JetBrains Mono', monospace;
  margin-top: 0.15em;
}

/* ── Usage Section ── */

.usage {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5em;
  margin-bottom: 2.5em;
}

.usage h3 {
  font-size: 0.85em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin: 0 0 1em;
}

.usage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1em;
}

@media (min-width: 640px) {
  .usage-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.usage-item label {
  display: block;
  font-size: 0.78em;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 0.4em;
}

.usage-item pre {
  background: var(--bg-code);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 0.7em 0.9em;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75em;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  color: var(--text);
}

.usage-item.full-width {
  grid-column: 1 / -1;
}

/* ── Variant Cards ── */

.variants-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6em;
  margin: 1.5em 0 2em;
}

a.variant-card {
  display: block;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.5em 0.4em;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  text-decoration: none;
  color: inherit;
  text-align: center;
}

a.variant-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}

a.variant-card.variant-active {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.variant-card h3 {
  margin: 0 0 0.3em;
  font-size: 0.78em;
  font-weight: 600;
}

.variant-card .sample {
  display: flex;
  gap: 3px;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 0.3em;
}

.variant-card .sample img.circle {
  border-radius: 50%;
}

.variant-card .variant-desc {
  font-size: 0.7em;
  color: var(--text-tertiary);
  line-height: 1.3;
}

/* ── Overview hero ── */

.hero-flags {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin: 1.5em 0 2em;
}

.hero-flags img {
  transition: transform 0.2s;
}

.hero-flags img:hover {
  transform: scale(1.12);
}

.hero-flags img.circle {
  border-radius: 50%;
}

/* ── Footer ── */

footer {
  margin-top: 4em;
  padding-top: 1.5em;
  border-top: 1px solid var(--border-light);
  font-size: 0.78em;
  color: var(--text-tertiary);
}

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

footer a:hover {
  text-decoration: underline;
}

/* ── Responsive ── */

@media (max-width: 600px) {
  body { padding: 1.5em 1em 3em; }
  h1 { font-size: 1.4em; }
  nav { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  nav a { white-space: nowrap; font-size: 0.8em; }
  .flags { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
  .flag-item img { max-width: 64px !important; height: auto !important; }
  .variants-grid { grid-template-columns: repeat(2, 1fr); }
}