/* 
  Shared styles across all Vinara pages
  - CSS variables for theming
  - @font-face for Vinara font
  - Base typography
  - Nav component
  - Card component (landing page)
  - Editorial styles (about/origins/guide pages)
  - Minimal functional styles (app/reference pages)
*/

/* ── Font Face ─────────────────────────────────────────────── */
@font-face {
  font-family: 'Vinara';
  src: url('font/vinara.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg: #0f0f11;
  --surface: #1a1a1e;
  --surface-raised: #222228;
  --border: #2a2a30;
  --border-light: #3a3a44;
  --text: #e8e8ec;
  --text-dim: #888899;
  --text-muted: #555566;
  --accent: #6b8cff;
  --accent-hover: #8aa8ff;
  --hover: #25252c;
  --active: #2a2a35;
  --danger: #ff6b6b;
  --danger-bg: rgba(255, 107, 107, 0.1);
  --font-ui: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
}

.light {
  --bg: #fafafa;
  --surface: #ffffff;
  --surface-raised: #f5f5f7;
  --border: #e2e2e8;
  --border-light: #d0d0d8;
  --text: #1a1a1e;
  --text-dim: #666670;
  --text-muted: #9999a5;
  --accent: #4a6fff;
  --accent-hover: #3a5fee;
  --hover: #f0f0f5;
  --active: #e8e8f0;
  --danger: #e03030;
  --danger-bg: rgba(224, 48, 48, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

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

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

a:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* ── Typography ────────────────────────────────────────────── */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.75rem; margin-top: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; margin-top: 2rem; margin-bottom: 0.75rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-dim);
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 12px;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

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

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

.icon-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

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

.icon-btn svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Header / Nav ──────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 52px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.wordmark {
  font-family: 'Vinara', serif;
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}

.wordmark span {
  color: var(--accent);
}

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

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 12px;
  font-family: var(--font-ui);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

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

.theme-btn svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-label {
  display: none;
}

@media (min-width: 600px) {
  .theme-label {
    display: inline;
  }
}

/* ── Tabs ──────────────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 2px;
  background: var(--bg);
  padding: 3px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.tab {
  padding: 5px 14px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 13px;
  font-family: var(--font-ui);
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

/* ── Landing Page ────────────────────────────────────────── */
.landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.landing-hero {
  text-align: center;
  padding: 80px 20px 60px;
}

.hero-glyphs {
  font-family: 'Vinara', serif;
  font-size: 72px;
  line-height: 1.1;
  margin-bottom: 24px;
  color: var(--text);
  letter-spacing: 0.04em;
}

.hero-tagline {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 1rem;
  color: var(--text-dim);
  max-width: 400px;
  margin: 0 auto 32px;
}

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

.hero-cta .btn {
  padding: 10px 24px;
  font-size: 14px;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.card:hover {
  transform: translateY(-2px);
  border-color: var(--border-light);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  text-decoration: none;
  color: inherit;
}

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--hover);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 18px;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.card-desc {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.card-arrow {
  margin-top: 12px;
  font-size: 12px;
  color: var(--accent);
  font-weight: 500;
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 24px 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  margin-top: auto;
}

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

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

/* ── Editorial Pages ─────────────────────────────────────── */
.editorial {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

.editorial h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.editorial .subtitle {
  font-size: 1.1rem;
  color: var(--text-dim);
  margin-bottom: 2rem;
}

.editorial h2 {
  font-size: 1.4rem;
  margin-top: 2.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.editorial p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.editorial strong {
  color: var(--text);
  font-weight: 600;
}

/* Pull quote */
.pull-quote {
  font-family: 'Vinara', serif;
  font-size: 1.6rem;
  line-height: 1.5;
  color: var(--text);
  text-align: center;
  padding: 32px 24px;
  margin: 32px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Character display */
.char-display {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.char-glyph {
  font-family: 'Vinara', serif;
  font-size: 64px;
  line-height: 1;
  color: var(--text);
  min-width: 80px;
  text-align: center;
}

.char-info h3 {
  margin: 0 0 4px;
  font-size: 1.1rem;
}

.char-info p {
  margin: 0;
  font-size: 0.9rem;
}

/* Section divider */
.section-divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
  border: none;
}

/* Version history */
.version-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.version-badge {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--hover);
  color: var(--text-dim);
  white-space: nowrap;
  height: fit-content;
}

.version-content p {
  margin: 0;
}

/* CTA block */
.cta-block {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 40px;
  text-align: center;
}

.cta-block p {
  margin-bottom: 16px;
  color: var(--text);
}

/* ── Reference Page ────────────────────────────────────────── */
.reference-page {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.reference-page h1 {
  font-size: 1.5rem;
  margin-bottom: 4px;
}

.reference-intro {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 24px;
}

.ref-table-wrap {
  overflow-x: auto;
  margin-bottom: 32px;
}

.ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.ref-table th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  white-space: nowrap;
}

.ref-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.ref-table tr:hover td {
  background: var(--hover);
}

.ref-table .cell-glyph {
  font-family: 'Vinara', serif;
  font-size: 28px;
  line-height: 1;
}

.ref-table .cell-thaana {
  font-family: 'Noto Sans Thaana', 'Thaana', sans-serif;
  font-size: 20px;
}

.ref-table .cell-key {
  font-family: monospace;
  font-size: 13px;
  background: var(--hover);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Keyboard map */
.keyboard-map {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 4px;
  max-width: 700px;
  margin: 0 auto 32px;
}

.kb-key {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 11px;
  padding: 4px;
}

.kb-key .kb-glyph {
  font-family: 'Vinara', serif;
  font-size: 18px;
  line-height: 1;
}

.kb-key .kb-shift {
  font-family: 'Vinara', serif;
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 2px;
}

.kb-key.vowel {
  border-color: var(--accent);
  background: rgba(107, 140, 255, 0.05);
}

.kb-key.extra {
  border-color: #f0a030;
  background: rgba(240, 160, 48, 0.05);
}

/* ── Back Nav ──────────────────────────────────────────────── */
.back-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  color: var(--text-dim);
  font-size: 14px;
  transition: color 0.15s;
}

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

.back-nav svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Code blocks ───────────────────────────────────────────── */
code {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
  font-size: 0.85em;
  background: var(--hover);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

pre {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 16px 0;
}

pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
}

/* ── Lists ─────────────────────────────────────────────────── */
ul, ol {
  margin: 0 0 1rem 1.5rem;
  color: var(--text-dim);
}

li {
  margin-bottom: 0.5rem;
}

/* ── Tables ───────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}

th, td {
  padding: 8px 12px;
  border: 1px solid var(--border);
  text-align: left;
}

th {
  background: var(--surface-raised);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Hamburger ─────────────────────────────────────────────── */
.hamburger {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
}

.hamburger:hover {
  background: var(--hover);
  color: var(--text);
}

.hamburger svg {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
}

@media (max-width: 600px) {
  .hamburger {
    display: flex;
  }
  .hero-glyphs {
    font-size: 48px;
  }
  .hero-tagline {
    font-size: 1.2rem;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .keyboard-map {
    grid-template-columns: repeat(5, 1fr);
  }
  .char-display {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
  .char-glyph {
    font-size: 48px;
  }
  .version-item {
    flex-direction: column;
    gap: 8px;
  }
}