/* ============================================
   Kiafrakan.com — Language Learning Design System
   ============================================ */

:root {
  --ink: #14110F;
  --deep-green: #12372A;
  --gold: #C9A227;
  --parchment: #F5EEDC;
  --ivory: #FFFDF5;
  --clay: #8A5A36;
  --muted-brown: #5F4634;
  --green-light: #1E5242;
  --gold-light: #E8D5A3;

  --font-heading: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);

  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--ivory);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--deep-green); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--gold); }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--deep-green);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.125rem; }

p { margin-bottom: var(--space-sm); }

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.section { padding: var(--space-lg) 0; }
.section-alt { background-color: var(--parchment); }

.text-center { text-align: center; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body); font-size: 1rem; font-weight: 600;
  border-radius: var(--radius-sm); cursor: pointer;
  transition: all 0.2s ease; border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--deep-green); color: var(--ivory); border-color: var(--deep-green);
}
.btn-primary:hover {
  background-color: var(--green-light); border-color: var(--green-light); color: var(--ivory);
}

.btn-secondary {
  background-color: transparent; color: var(--deep-green); border-color: var(--deep-green);
}
.btn-secondary:hover { background-color: var(--deep-green); color: var(--ivory); }

.btn-gold {
  background-color: var(--gold); color: var(--ink); border-color: var(--gold);
}
.btn-gold:hover { background-color: #B08E1F; border-color: #B08E1F; color: var(--ink); }

/* Header */
.header {
  position: sticky; top: 0; z-index: 1000;
  background-color: rgba(255, 253, 245, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(18, 55, 42, 0.08);
  height: var(--header-height); display: flex; align-items: center;
}
.header .container {
  display: flex; align-items: center; justify-content: space-between;
}

.logo {
  font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700;
  color: var(--deep-green); letter-spacing: -0.02em;
}

.nav { display: none; }
.nav-list {
  display: flex; list-style: none; gap: var(--space-md);
}
.nav-list a {
  font-weight: 500; font-size: 0.9375rem; color: var(--ink); position: relative;
}
.nav-list a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
  background-color: var(--gold); transition: width 0.3s ease;
}
.nav-list a:hover::after { width: 100%; }
.nav-list a:hover { color: var(--deep-green); }

.mobile-menu-toggle {
  display: flex; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.mobile-menu-toggle span {
  display: block; width: 24px; height: 2px; background-color: var(--deep-green);
  transition: all 0.3s ease;
}

.mobile-nav {
  position: fixed; top: var(--header-height); left: 0; right: 0;
  background-color: var(--ivory); border-bottom: 1px solid rgba(18, 55, 42, 0.1);
  padding: var(--space-md); transform: translateY(-100%); opacity: 0;
  pointer-events: none; transition: all 0.3s ease; z-index: 999;
}
.mobile-nav.active { transform: translateY(0); opacity: 1; pointer-events: all; }
.mobile-nav ul {
  list-style: none; display: flex; flex-direction: column; gap: var(--space-sm);
}
.mobile-nav a {
  font-size: 1.125rem; font-weight: 500; color: var(--ink);
  display: block; padding: 0.5rem 0; border-bottom: 1px solid rgba(18, 55, 42, 0.06);
}

/* Hero */
.hero {
  padding: var(--space-xl) 0;
  background: linear-gradient(135deg, var(--ivory) 0%, var(--parchment) 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; right: -20%; width: 80%; height: 200%;
  background: radial-gradient(circle, rgba(201, 162, 39, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero .container {
  display: grid; grid-template-columns: 1fr; gap: var(--space-lg); align-items: center;
}
.hero-content { position: relative; z-index: 1; }
.hero h1 { margin-bottom: var(--space-sm); }
.hero-subheadline {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem); color: var(--muted-brown);
  margin-bottom: var(--space-md); max-width: 540px; line-height: 1.5;
}
.hero-body {
  font-size: 1rem; color: var(--clay); margin-bottom: var(--space-md); max-width: 540px;
}
.hero-buttons { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.hero-visual { position: relative; z-index: 1; }

/* Dashboard Card */
.dashboard-card {
  background-color: #fff; border-radius: var(--radius-lg); padding: var(--space-md);
  box-shadow: var(--shadow-lg); border: 1px solid rgba(201, 162, 39, 0.2);
  position: relative; overflow: hidden;
}
.dashboard-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--gold), var(--deep-green));
}
.dashboard-card-title {
  font-family: var(--font-heading); font-size: 1.25rem; color: var(--deep-green);
  margin-bottom: var(--space-sm); display: flex; align-items: center; gap: 0.5rem;
}
.dashboard-card-icon {
  width: 32px; height: 32px; background-color: var(--gold); border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.875rem; color: #fff;
}
.dashboard-card-row {
  display: flex; justify-content: space-between; padding: 0.75rem 0;
  border-bottom: 1px solid rgba(18, 55, 42, 0.08); font-size: 0.9375rem;
}
.dashboard-card-row:last-child { border-bottom: none; }
.dashboard-card-label { color: var(--clay); font-weight: 500; }
.dashboard-card-value { font-weight: 600; color: var(--deep-green); }

/* Section Headers */
.section-header {
  text-align: center; max-width: 700px; margin: 0 auto var(--space-lg);
}
.section-header h2 { margin-bottom: var(--space-xs); }
.section-header p { color: var(--muted-brown); font-size: 1.125rem; }

/* Cards */
.card-grid {
  display: grid; grid-template-columns: 1fr; gap: var(--space-md);
}
.card {
  background-color: #fff; border-radius: var(--radius-md); padding: var(--space-md);
  box-shadow: var(--shadow-sm); border: 1px solid rgba(18, 55, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 48px; height: 48px; background-color: var(--parchment);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-sm); font-size: 1.25rem; color: var(--deep-green);
}
.card h3 { margin-bottom: var(--space-xs); font-size: 1.25rem; }
.card p { color: var(--muted-brown); font-size: 0.9375rem; line-height: 1.6; margin-bottom: 0; }

/* Quote Card */
.quote-card {
  background-color: var(--parchment); border-radius: var(--radius-md);
  padding: var(--space-md); border-left: 4px solid var(--gold);
  font-family: var(--font-heading); font-size: 1.25rem; color: var(--deep-green);
  line-height: 1.5; font-style: italic;
}
.quote-card cite {
  display: block; margin-top: var(--space-sm); font-family: var(--font-body);
  font-size: 0.875rem; font-style: normal; color: var(--clay);
}

/* Alphabet Explorer */
.filter-tabs {
  display: flex; gap: var(--space-xs); margin-bottom: var(--space-md);
  flex-wrap: wrap; justify-content: center;
}
.filter-tab {
  padding: 0.5rem 1rem; border-radius: var(--radius-sm); border: 1px solid rgba(18,55,42,0.12);
  background-color: #fff; color: var(--ink); font-family: var(--font-body); font-size: 0.875rem;
  font-weight: 500; cursor: pointer; transition: all 0.2s ease;
}
.filter-tab:hover { background-color: var(--parchment); }
.filter-tab.active {
  background-color: var(--deep-green); color: var(--ivory); border-color: var(--deep-green);
}

.alphabet-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md);
}

.letter-card {
  background-color: #fff; border-radius: var(--radius-md); padding: var(--space-md);
  box-shadow: var(--shadow-sm); border: 1px solid rgba(18, 55, 42, 0.06);
  text-align: center; position: relative; overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.letter-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.letter-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background-color: var(--gold);
}
.letter-card.needs-review::before { background-color: var(--clay); }

.letter-latin {
  font-family: var(--font-heading); font-size: 2rem; font-weight: 700;
  color: var(--deep-green); margin-bottom: var(--space-xs);
}
.letter-glyph {
  width: 100%; height: 220px; margin: 0 auto var(--space-sm);
  background-color: var(--parchment); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed rgba(18, 55, 42, 0.12);
  overflow: hidden;
  padding: 0.5rem;
}
.letter-glyph img {
  max-width: 100%; max-height: 100%; object-fit: contain; border-radius: var(--radius-sm);
}
.letter-meta {
  text-align: left; font-size: 0.875rem; color: var(--muted-brown);
  margin-top: var(--space-sm);
}
.letter-meta dt {
  font-weight: 600; color: var(--ink); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 0.125rem; margin-top: 0.5rem;
}
.letter-meta dd { margin: 0; }

.badge {
  display: inline-block; padding: 0.25rem 0.75rem; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em;
  margin-top: var(--space-xs);
}
.badge-review { background-color: rgba(138, 90, 54, 0.1); color: var(--clay); }
.badge-vowel { background-color: rgba(18, 55, 42, 0.08); color: var(--deep-green); }

/* Number System */
.number-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-md);
}

.number-card {
  background-color: #fff; border-radius: var(--radius-md); padding: var(--space-md);
  box-shadow: var(--shadow-sm); border: 1px solid rgba(18, 55, 42, 0.06);
  text-align: center; position: relative; overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.number-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.number-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background-color: var(--gold);
}
.number-card.base-number::before { background-color: var(--deep-green); }

.number-value {
  font-family: var(--font-heading); font-size: 2.5rem; font-weight: 700;
  color: var(--deep-green); margin-bottom: var(--space-xs);
}
.number-glyph {
  width: 100%; height: 200px; margin: 0 auto var(--space-sm);
  background-color: var(--parchment); border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed rgba(18, 55, 42, 0.12);
  overflow: hidden;
  padding: 0.5rem;
}
.number-glyph img {
  max-width: 100%; max-height: 100%; object-fit: contain; border-radius: var(--radius-sm);
}
.number-glyph img {
  width: 100%; height: 100%; object-fit: contain; border-radius: var(--radius-sm);
}
.number-name {
  font-weight: 600; font-size: 1rem; color: var(--ink); margin-bottom: 0.25rem;
}
.number-meta {
  text-align: left; font-size: 0.875rem; color: var(--muted-brown);
  margin-top: var(--space-sm);
}
.number-meta dt {
  font-weight: 600; color: var(--ink); font-size: 0.75rem; text-transform: uppercase;
  letter-spacing: 0.05em; margin-bottom: 0.125rem; margin-top: 0.5rem;
}
.number-meta dd { margin: 0; }

/* Pattern Explainer */
.pattern-card {
  background-color: var(--parchment); border-radius: var(--radius-md);
  padding: var(--space-md); border: 1px solid rgba(201, 162, 39, 0.2);
  margin-top: var(--space-md);
}
.pattern-card h4 {
  font-size: 1.25rem; margin-bottom: var(--space-xs); color: var(--deep-green);
}
.pattern-card p { color: var(--muted-brown); font-size: 0.9375rem; margin-bottom: 0; }

/* Table */
.table-wrapper {
  overflow-x: auto; border-radius: var(--radius-md); box-shadow: var(--shadow-sm);
  border: 1px solid rgba(18, 55, 42, 0.06);
}
.table-wrapper table {
  width: 100%; border-collapse: collapse; background-color: #fff; min-width: 600px;
}
.table-wrapper thead { background-color: var(--deep-green); color: var(--ivory); }
.table-wrapper th {
  padding: 1rem; text-align: left; font-weight: 600; font-size: 0.9375rem; white-space: nowrap;
}
.table-wrapper td {
  padding: 1rem; font-size: 0.9375rem; border-bottom: 1px solid rgba(18, 55, 42, 0.06);
  color: var(--ink);
}
.table-wrapper tbody tr:nth-child(even) { background-color: rgba(245, 238, 220, 0.4); }
.table-wrapper tbody tr:hover { background-color: rgba(245, 238, 220, 0.8); }

/* Source Document Cards */
.source-card {
  background-color: #fff; border-radius: var(--radius-md); overflow: hidden;
  box-shadow: var(--shadow-sm); border: 1px solid rgba(18, 55, 42, 0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.source-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.source-card-image {
  width: 100%; height: 200px; object-fit: cover; background-color: var(--parchment);
}
.source-card-image img {
  width: 100%; height: 100%; object-fit: cover;
}
.source-card-body { padding: var(--space-md); }
.source-card-body h3 { font-size: 1.25rem; margin-bottom: var(--space-xs); }
.source-card-body p { color: var(--muted-brown); font-size: 0.9375rem; margin-bottom: 0; }
.source-card-body .badge { margin-top: var(--space-xs); }

/* Contact Card */
.contact-card {
  background-color: #fff; border-radius: var(--radius-md); padding: var(--space-md);
  box-shadow: var(--shadow-sm); border: 1px solid rgba(18, 55, 42, 0.06);
  max-width: 500px; margin: 0 auto;
}
.contact-card h3 { font-size: 1.25rem; margin-bottom: var(--space-xs); }
.contact-card p { color: var(--muted-brown); font-size: 0.9375rem; margin-bottom: 0.5rem; }

/* CTA Section */
.cta-section {
  background-color: var(--deep-green); color: var(--ivory);
  text-align: center; padding: var(--space-xl) 0;
}
.cta-section h2 { color: var(--gold); margin-bottom: var(--space-sm); }
.cta-section p { color: rgba(245, 238, 220, 0.85); font-size: 1.125rem; margin-bottom: var(--space-md); }

/* Footer */
.footer {
  background-color: var(--ink); color: rgba(255, 253, 245, 0.7);
  padding: var(--space-lg) 0 var(--space-md);
}
.footer-grid {
  display: grid; grid-template-columns: 1fr; gap: var(--space-md);
  margin-bottom: var(--space-md);
}
.footer-brand {
  font-family: var(--font-heading); font-size: 1.5rem; color: var(--gold); margin-bottom: var(--space-xs);
}
.footer p { font-size: 0.9375rem; line-height: 1.6; }
.footer-links {
  list-style: none; display: flex; flex-direction: column; gap: 0.75rem;
}
.footer-links a { color: rgba(255, 253, 245, 0.7); font-size: 0.9375rem; }
.footer-links a:hover { color: var(--gold); }
.footer-bottom {
  border-top: 1px solid rgba(255, 253, 245, 0.1); padding-top: var(--space-md);
  text-align: center; font-size: 0.875rem; color: rgba(255, 253, 245, 0.5);
}

/* Responsive */
@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .alphabet-grid { grid-template-columns: repeat(3, 1fr); }
  .number-grid { grid-template-columns: repeat(3, 1fr); }
  .source-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .nav { display: flex; align-items: center; gap: var(--space-md); }
  .mobile-menu-toggle { display: none; }
  .hero .container { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 2fr 1fr; }
}

@media (min-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
  .alphabet-grid { grid-template-columns: repeat(4, 1fr); }
  .number-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1200px) {
  .alphabet-grid { grid-template-columns: repeat(5, 1fr); }
  .number-grid { grid-template-columns: repeat(5, 1fr); }
}