/* ═══════════════════════════════════════════════════════════════
   Finance.MUSAMU — main.css
   Design System + Layout + Navbar + Homepage + Footer
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. CSS Custom Properties ─────────────────────────────────── */
:root {
  --bg-base:        #070e0a;
  --bg-surface:     #0f1a13;
  --bg-surface-2:   #172010;
  --bg-surface-3:   #1e2d18;
  --border-subtle:  #1e3024;
  --border-medium:  #2a4030;
  --border-strong:  #3d5e48;
  --green-dark:     #063d22;
  --green-base:     #0a6b3b;
  --green-mid:      #0d8f50;
  --green-bright:   #16c464;
  --green-muted:    #2d6b45;
  --gold-base:      #f4a517;
  --gold-light:     #ffc84a;
  --gold-dim:       #b87a10;
  --text-primary:   #e8f0eb;
  --text-secondary: #9ab8a4;
  --text-muted:     #5a7a68;
  --text-inverse:   #070e0a;
  --color-positive: #22c55e;
  --color-negative: #ef4444;
  --color-warning:  #f59e0b;
  --chart-1:        #0d8f50;
  --chart-2:        #f4a517;
  --chart-3:        #14b8a6;
  --chart-4:        #f97316;
  --chart-5:        #8b5cf6;
  --chart-6:        #3b82f6;
  --space-1:4px; --space-2:8px; --space-3:12px; --space-4:16px;
  --space-5:24px; --space-6:32px; --space-7:48px; --space-8:64px;
  --radius-sm:8px; --radius-md:12px; --radius-lg:16px; --radius-xl:24px;
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-green: 0 0 24px rgba(13,143,80,0.2);
  --shadow-gold:  0 0 24px rgba(244,165,23,0.15);
  --transition: 250ms ease;
  --font-display: 'Bricolage Grotesque', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
}

[data-theme="light"] {
  --bg-base:        #f4f9f6;
  --bg-surface:     #ffffff;
  --bg-surface-2:   #edf7f1;
  --bg-surface-3:   #ddf0e7;
  --border-subtle:  #c8e0d2;
  --border-medium:  #a0c8b2;
  --border-strong:  #70a888;
  --text-primary:   #0c1e12;
  --text-secondary: #3a6b50;
  --text-muted:     #7aaa90;
}

/* ── 2. Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--green-mid); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--green-bright); }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }
input, select, textarea { font-family: inherit; }

/* ── 3. Grain overlay ─────────────────────────────────────────── */
.grain-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 9999;
  opacity: 0.28;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
}

/* ── 4. Container ─────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-5); }

/* ── 5. Navbar ────────────────────────────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(7,14,10,0.88);
  backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
}
[data-theme="light"] .navbar { background: rgba(244,249,246,0.92); }

.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; padding: 0 var(--space-5); gap: var(--space-4);
  max-width: 1440px; margin: 0 auto;
}

.navbar-brand {
  display: flex; align-items: center; gap: var(--space-3);
  font-family: var(--font-display); font-weight: 800;
  font-size: 18px; color: var(--text-primary); flex-shrink: 0;
}
.brand-icon {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green-mid), var(--green-base));
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: #fff; font-weight: 700; font-family: var(--font-mono);
}
.brand-dot { color: var(--gold-base); }

.navbar-nav { display: flex; align-items: center; gap: 2px; }

.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 4px;
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition);
}
.nav-link:hover, .nav-item:hover .nav-link {
  color: var(--green-mid); background: rgba(13,143,80,0.08);
}
.nav-arrow { font-size: 10px; opacity: 0.6; transition: transform var(--transition); }
.nav-item:hover .nav-arrow { transform: rotate(180deg); }

.nav-dropdown {
  position: absolute; top: calc(100% + 6px); left: 0;
  min-width: 220px; background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg); padding: var(--space-2);
  box-shadow: var(--shadow-lg); opacity: 0; visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 200;
}
.nav-item:hover .nav-dropdown, .nav-item:focus-within .nav-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-dropdown-item {
  display: block; padding: 9px 14px; font-size: 13px;
  color: var(--text-secondary); border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-dropdown-item:hover { color: var(--green-mid); background: var(--bg-surface-2); }

/* Navbar controls */
.navbar-controls { display: flex; align-items: center; gap: var(--space-2); }

.currency-selector {
  display: flex; align-items: center;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 3px;
}
.currency-btn {
  padding: 5px 10px; border-radius: var(--radius-sm);
  font-size: 12px; font-family: var(--font-mono); font-weight: 500;
  color: var(--text-muted); transition: all var(--transition);
}
.currency-btn:hover { color: var(--green-mid); }
.currency-btn.active {
  background: var(--green-mid); color: #fff;
}

.theme-toggle {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  font-size: 16px; transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--green-mid); }

/* Mobile hamburger */
.mobile-menu-btn {
  display: none; flex-direction: column; justify-content: center;
  gap: 5px; width: 38px; height: 38px; padding: 8px;
}
.hbg-line {
  height: 2px; background: var(--text-secondary); border-radius: 2px;
  transition: all var(--transition);
}

/* Mobile menu */
.mobile-menu {
  display: none; border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface); max-height: 80vh; overflow-y: auto;
  padding: var(--space-4);
}
.mobile-menu.open { display: block; }
.mobile-section { margin-bottom: var(--space-5); }
.mobile-section-title {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--green-mid); text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: var(--space-2);
}
.mobile-links-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
}
.mobile-link {
  padding: 8px 10px; font-size: 13px; color: var(--text-secondary);
  border-radius: var(--radius-sm); transition: all var(--transition);
  display: block;
}
.mobile-link:hover { color: var(--green-mid); background: var(--bg-surface-2); }
.mobile-currency { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-top: var(--space-5); }

/* ── 6. Hero Section ──────────────────────────────────────────── */
.hero {
  position: relative; overflow: hidden;
  padding: 80px var(--space-5) 60px;
  text-align: center;
}
.hero-glow {
  position: absolute; top: -100px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 500px;
  background: radial-gradient(ellipse, rgba(13,143,80,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-block; margin-bottom: var(--space-5);
  padding: 6px 20px; border-radius: 99px;
  background: rgba(13,143,80,0.1); border: 1px solid rgba(13,143,80,0.3);
  font-family: var(--font-mono); font-size: 12px; color: var(--green-mid);
  letter-spacing: 0.08em; text-transform: uppercase;
}
.hero-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(38px, 7vw, 72px); line-height: 1.08;
  margin-bottom: var(--space-5); color: var(--text-primary);
}
.hero-title .accent-green { color: var(--green-mid); }
.hero-title .accent-gold  { color: var(--gold-base); }
.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px); color: var(--text-secondary);
  max-width: 560px; margin: 0 auto var(--space-6); line-height: 1.65;
}
.hero-ctas { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; margin-bottom: var(--space-8); }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--green-mid), var(--green-base));
  color: #fff; font-weight: 600; font-size: 15px;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(13,143,80,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(13,143,80,0.5);
  color: #fff;
}
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: var(--radius-md);
  background: var(--bg-surface); border: 1px solid var(--border-medium);
  color: var(--text-secondary); font-weight: 500; font-size: 15px;
  transition: all var(--transition);
}
.btn-secondary:hover {
  border-color: var(--green-mid); color: var(--green-mid);
}

/* Stats row */
.hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; margin-bottom: var(--space-7); }
.hero-stat-num {
  font-family: var(--font-mono); font-size: 36px; font-weight: 700;
  color: var(--green-mid); display: block; line-height: 1;
}
.hero-stat-label {
  font-size: 12px; color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.08em; margin-top: 4px; display: block;
}

/* Ticker strip */
.ticker-wrap {
  border-top: 1px solid var(--border-subtle);
  padding: 14px 0; overflow: hidden;
}
.ticker-inner { display: flex; width: max-content; animation: ticker 45s linear infinite; }
.ticker-inner:hover { animation-play-state: paused; }
.ticker-item {
  display: flex; align-items: center; gap: 10px;
  padding: 0 28px; white-space: nowrap;
  font-family: var(--font-mono); font-size: 12px;
}
.ticker-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green-mid); flex-shrink: 0; animation: pulse 2s ease-in-out infinite; }
.ticker-label { color: var(--text-muted); }
.ticker-val { color: var(--green-mid); font-weight: 600; }

/* ── 7. Section Styles ────────────────────────────────────────── */
.section { padding: var(--space-8) var(--space-5); }
.section-header { margin-bottom: var(--space-6); }
.section-eyebrow {
  display: block; font-family: var(--font-mono); font-size: 11px;
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.12em; margin-bottom: var(--space-2);
}
.section-title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(24px, 3vw, 34px); color: var(--text-primary);
}

/* ── 8. Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); transition: all var(--transition);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-mid), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.card:hover {
  border-color: var(--border-medium);
  box-shadow: var(--shadow-green);
  transform: translateY(-2px);
}
.card:hover::before { opacity: 1; }

/* ── 9. Popular Calculators Grid ──────────────────────────────── */
.popular-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}
.popular-card {
  display: flex; flex-direction: column;
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
}
.popular-icon { font-size: 28px; margin-bottom: var(--space-3); }
.popular-name {
  font-size: 14px; font-weight: 600; color: var(--text-primary);
  margin-bottom: 4px; transition: color var(--transition);
}
.popular-card:hover .popular-name { color: var(--green-mid); }
.popular-desc { font-size: 12px; color: var(--text-muted); }

/* ── 10. Category Cards ───────────────────────────────────────── */
.category-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-4);
}
.category-card { padding: var(--space-5); cursor: pointer; }
.category-card-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: var(--space-3); }
.category-icon { font-size: 36px; }
.category-count {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--green-mid); background: rgba(13,143,80,0.1);
  border: 1px solid rgba(13,143,80,0.2);
  padding: 3px 10px; border-radius: 99px;
}
.category-name {
  font-family: var(--font-display); font-weight: 700;
  font-size: 20px; color: var(--text-primary);
  margin-bottom: var(--space-2); transition: color var(--transition);
}
.category-card:hover .category-name { color: var(--green-mid); }
.category-desc { font-size: 13px; color: var(--text-muted); margin-bottom: var(--space-4); line-height: 1.55; }
.category-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.category-tag {
  font-size: 11px; color: var(--text-muted);
  background: var(--bg-surface-2); border: 1px solid var(--border-subtle);
  padding: 3px 10px; border-radius: var(--radius-sm);
}

/* ── 11. Features ──────────────────────────────────────────────── */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-4); }
.feature-card { padding: var(--space-5); }
.feature-icon { font-size: 32px; margin-bottom: var(--space-3); }
.feature-name { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: var(--space-2); }
.feature-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ── 12. Footer ────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--border-subtle); background: var(--bg-surface); margin-top: var(--space-8); }
.footer-inner {
  display: grid; grid-template-columns: 2fr repeat(5, 1fr);
  gap: var(--space-6); padding: var(--space-8) var(--space-5);
  max-width: 1440px; margin: 0 auto;
}
.footer-logo {
  font-family: var(--font-display); font-weight: 800;
  font-size: 20px; color: var(--text-primary); display: block; margin-bottom: var(--space-2);
}
.footer-tagline { font-size: 13px; color: var(--text-muted); margin-bottom: var(--space-4); }
.footer-badges { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.footer-badge {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--green-mid); background: rgba(13,143,80,0.08);
  border: 1px solid rgba(13,143,80,0.2); padding: 3px 10px; border-radius: 99px;
}
.footer-col-title {
  font-size: 11px; font-family: var(--font-mono);
  color: var(--text-muted); text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: var(--space-3);
}
.footer-links li { margin-bottom: var(--space-2); }
.footer-links a { font-size: 13px; color: var(--text-muted); transition: color var(--transition); }
.footer-links a:hover { color: var(--green-mid); }
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-5) var(--space-5);
}
.footer-bottom-inner { max-width: 1440px; margin: 0 auto; display: flex; flex-direction: column; gap: 6px; }
.footer-copyright { font-size: 13px; color: var(--text-muted); }
.footer-disclaimer { font-size: 11px; color: var(--text-muted); max-width: 700px; }

/* ── 13. Animations ────────────────────────────────────────────── */
@keyframes ticker   { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes fadeInUp { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }
@keyframes pulse    { 0%,100% { opacity:1; } 50% { opacity:0.3; } }
@keyframes spin     { to { transform: rotate(360deg); } }

.fade-in-up { animation: fadeInUp 0.5s ease forwards; }
.fade-in-up-1 { animation: fadeInUp 0.5s 0.1s ease both; }
.fade-in-up-2 { animation: fadeInUp 0.5s 0.2s ease both; }
.fade-in-up-3 { animation: fadeInUp 0.5s 0.3s ease both; }

/* ── 14. Toast ─────────────────────────────────────────────────── */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 9000; display: flex; flex-direction: column; gap: 10px; }
.toast {
  padding: 12px 20px; border-radius: var(--radius-md);
  font-size: 14px; font-weight: 500; color: #fff;
  box-shadow: var(--shadow-lg); animation: fadeInUp 0.3s ease;
  max-width: 320px;
}
.toast-success { background: var(--green-base); }
.toast-error   { background: var(--color-negative); }
.toast-info    { background: var(--chart-6); }

/* ── 15. Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--green-mid); }

/* ── 16. Responsive ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .navbar-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .footer-inner { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .hero { padding: 48px var(--space-4) 40px; }
  .hero-stats { gap: var(--space-6); }
  .popular-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .popular-grid { grid-template-columns: 1fr 1fr; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .footer-inner { grid-template-columns: 1fr; }
  .currency-selector { display: none; }
  .mobile-currency .currency-selector { display: flex; }
}

/* ── Hero Section ───────────────────────────────────────────────── */
.hero {
  position: relative; min-height: 85vh;
  display: flex; align-items: center; overflow: hidden;
  padding: var(--space-9) 0 var(--space-8);
}
.hero-glow {
  position: absolute; top: -20%; left: 50%; transform: translateX(-50%);
  width: 700px; height: 700px; border-radius: 50%;
  background: radial-gradient(circle, rgba(13,143,80,0.18) 0%, transparent 70%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 99px;
  background: rgba(13,143,80,0.1); border: 1px solid rgba(13,143,80,0.25);
  color: var(--green-mid); font-size: 13px; font-family: var(--font-mono);
  letter-spacing: 0.04em; margin-bottom: var(--space-5);
}
.hero-title {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(42px, 7vw, 80px); line-height: 1.05;
  color: var(--text-primary); margin-bottom: var(--space-5); max-width: 800px;
}
.hero-title .accent-green { color: var(--green-mid); }
.hero-title .accent-gold  { color: var(--gold-base); }
.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px); color: var(--text-secondary);
  max-width: 560px; line-height: 1.7; margin-bottom: var(--space-7);
}
.hero-ctas { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-7); }
.btn-primary {
  padding: 14px 28px; border-radius: var(--radius-md); font-size: 15px; font-weight: 600;
  background: var(--green-mid); color: #fff; text-decoration: none; border: none;
  cursor: pointer; transition: all var(--transition);
  box-shadow: 0 0 20px rgba(13,143,80,0.3);
}
.btn-primary:hover { background: var(--green-bright); transform: translateY(-2px); }
.btn-secondary {
  padding: 14px 28px; border-radius: var(--radius-md); font-size: 15px; font-weight: 500;
  background: transparent; color: var(--text-secondary); text-decoration: none;
  border: 1px solid var(--border-medium); cursor: pointer; transition: all var(--transition);
}
.btn-secondary:hover { border-color: var(--green-mid); color: var(--green-mid); }
.hero-stats { display: flex; gap: var(--space-7); flex-wrap: wrap; margin-bottom: var(--space-6); }
.hero-stat-num { font-family: var(--font-mono); font-size: 28px; font-weight: 700; color: var(--gold-base); line-height: 1; }
.hero-stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ── Ticker ─────────────────────────────────────────────────────── */
.ticker-wrap {
  overflow: hidden; border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0; background: var(--bg-surface);
}
.ticker-inner {
  display: flex; gap: 0; white-space: nowrap;
  animation: ticker-scroll 50s linear infinite;
}
.ticker-inner:hover { animation-play-state: paused; }
.ticker-item {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0 var(--space-7); font-size: 13px;
  font-family: var(--font-mono); color: var(--text-muted);
  border-right: 1px solid var(--border-subtle);
}
.ticker-item strong { color: var(--gold-base); }
@keyframes ticker-scroll { 0%{ transform: translateX(0); } 100%{ transform: translateX(-50%); } }

/* ── Section layout ─────────────────────────────────────────────── */
.section-header { margin-bottom: var(--space-6); }
.section-label {
  font-size: 11px; font-family: var(--font-mono); text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--green-mid); margin-bottom: var(--space-2);
}
.section-title-lg {
  font-family: var(--font-display); font-size: clamp(26px, 4vw, 38px);
  font-weight: 700; color: var(--text-primary); line-height: 1.2;
}
.section-subtitle { font-size: 16px; color: var(--text-muted); margin-top: var(--space-2); }

/* ── Popular Grid ───────────────────────────────────────────────── */
.popular-section { padding: var(--space-9) 0; }
.popular-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4);
}
.popular-card {
  padding: var(--space-5); border-radius: var(--radius-lg);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  text-decoration: none; transition: all var(--transition);
  display: block; position: relative; overflow: hidden;
}
.popular-card::before {
  content: ''; position: absolute; inset: 0; top: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-mid), transparent);
  opacity: 0; transition: opacity var(--transition);
}
.popular-card:hover { border-color: var(--border-medium); transform: translateY(-3px); box-shadow: var(--shadow-green); }
.popular-card:hover::before { opacity: 1; }
.popular-icon { font-size: 28px; margin-bottom: var(--space-3); }
.popular-name { font-size: 14px; font-weight: 600; color: var(--text-primary); margin-bottom: 4px; }
.popular-desc { font-size: 12px; color: var(--text-muted); }

/* ── Category Cards ─────────────────────────────────────────────── */
.categories-section { padding: var(--space-8) 0; }
.categories-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5);
}
.category-card {
  padding: var(--space-6); border-radius: var(--radius-xl);
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  text-decoration: none; transition: all var(--transition);
  display: block; position: relative; overflow: hidden;
}
.category-card:hover { border-color: var(--green-mid); transform: translateY(-4px); box-shadow: var(--shadow-green); }
.category-icon { font-size: 40px; margin-bottom: var(--space-4); }
.category-title { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--text-primary); margin-bottom: var(--space-2); }
.category-count { font-size: 12px; color: var(--green-mid); font-family: var(--font-mono); margin-bottom: var(--space-3); }
.category-desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: var(--space-4); }
.category-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.cat-tag {
  font-size: 11px; padding: 3px 10px; border-radius: 99px;
  background: var(--bg-surface-2); border: 1px solid var(--border-subtle);
  color: var(--text-muted); font-family: var(--font-mono);
}

/* ── Why Section ────────────────────────────────────────────────── */
.why-section { padding: var(--space-9) 0; }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.why-card {
  padding: var(--space-5); border-radius: var(--radius-lg);
  background: var(--bg-surface); border: 1px solid var(--border-subtle); text-align: center;
}
.why-icon { font-size: 36px; margin-bottom: var(--space-3); }
.why-title { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: var(--space-2); }
.why-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ── Footer ─────────────────────────────────────────────────────── */
.site-footer { background: var(--bg-surface); border-top: 1px solid var(--border-subtle); margin-top: var(--space-9); }
.footer-inner {
  max-width: 1200px; margin: 0 auto; padding: var(--space-8) var(--space-5);
  display: grid; grid-template-columns: 1.5fr repeat(4, 1fr); gap: var(--space-7);
}
.footer-logo { font-family: var(--font-display); font-size: 22px; font-weight: 700; color: var(--text-primary); text-decoration: none; display: block; margin-bottom: var(--space-3); }
.footer-tagline { font-size: 13px; color: var(--text-muted); margin-bottom: var(--space-4); }
.footer-badges { display: flex; flex-wrap: wrap; gap: 6px; }
.footer-badge {
  font-size: 11px; padding: 3px 10px; border-radius: 99px;
  background: rgba(13,143,80,0.1); border: 1px solid rgba(13,143,80,0.2);
  color: var(--green-mid); font-family: var(--font-mono);
}
.footer-col-title { font-size: 11px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: var(--space-4); }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: var(--space-2); }
.footer-links a { font-size: 13px; color: var(--text-muted); text-decoration: none; transition: color var(--transition); }
.footer-links a:hover { color: var(--green-mid); }
.footer-bottom { border-top: 1px solid var(--border-subtle); padding: var(--space-5); }
.footer-bottom-inner { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: var(--space-4); flex-wrap: wrap; }
.footer-copyright { font-size: 13px; color: var(--text-muted); font-family: var(--font-mono); }
.footer-disclaimer { font-size: 12px; color: var(--text-dim, #3a5545); max-width: 500px; line-height: 1.5; }

/* ── Fade-in animations ─────────────────────────────────────────── */
.fade-in-up   { animation: fadeUp 0.6s ease both; }
.fade-in-up-1 { animation: fadeUp 0.6s ease 0.1s both; }
.fade-in-up-2 { animation: fadeUp 0.6s ease 0.2s both; }
.fade-in-up-3 { animation: fadeUp 0.6s ease 0.3s both; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ── Homepage responsive ────────────────────────────────────────── */
@media (max-width: 1024px) {
  .categories-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { min-height: auto; padding: var(--space-8) 0; }
  .hero-title { font-size: 38px; }
  .categories-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: var(--space-5); }
}
@media (max-width: 480px) {
  .popular-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ── Navbar ─────────────────────────────────────────────────────── */
.navbar {
  position: sticky; top: 0; z-index: 100; height: 64px;
  background: rgba(7,14,10,0.88); backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle); transition: all var(--transition);
}
.navbar-scrolled { background: rgba(7,14,10,0.97); }
.navbar-inner {
  max-width: 1200px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 var(--space-5); gap: var(--space-4);
}
.navbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-icon {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--green-mid); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700;
}
.brand-text { font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--text-primary); }
.brand-dot { color: var(--gold-base); }

.navbar-nav { display: flex; align-items: center; gap: var(--space-2); }
.nav-item { position: relative; }
.nav-link {
  padding: 8px 14px; border-radius: var(--radius-md); font-size: 14px;
  color: var(--text-secondary); background: none; border: none; cursor: pointer;
  display: flex; align-items: center; gap: 4px; transition: all var(--transition);
  font-family: var(--font-body);
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-surface-2); }
.nav-arrow { font-size: 10px; transition: transform var(--transition); }
.nav-item:hover .nav-arrow { transform: rotate(180deg); }

.nav-dropdown {
  display: none; position: absolute; top: calc(100% + 8px); left: 0;
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: var(--space-2); min-width: 220px;
  box-shadow: var(--shadow-lg); z-index: 200;
}
.nav-dropdown-item {
  display: block; padding: 9px 14px; border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-secondary); text-decoration: none;
  transition: all var(--transition);
}
.nav-dropdown-item:hover { background: var(--bg-surface-2); color: var(--green-mid); }

.navbar-controls { display: flex; align-items: center; gap: var(--space-3); }
.currency-selector { display: flex; align-items: center; gap: 4px; }
.currency-btn {
  padding: 5px 10px; border-radius: var(--radius-sm); font-size: 12px;
  font-family: var(--font-mono); color: var(--text-muted); background: none;
  border: 1px solid transparent; cursor: pointer; transition: all var(--transition);
}
.currency-btn:hover, .currency-btn.active {
  color: var(--gold-base); border-color: rgba(244,165,23,0.3);
  background: rgba(244,165,23,0.08);
}
.theme-toggle {
  width: 36px; height: 36px; border-radius: var(--radius-sm); background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle); cursor: pointer; font-size: 16px;
  display: flex; align-items: center; justify-content: center; transition: all var(--transition);
}
.theme-toggle:hover { border-color: var(--border-medium); transform: rotate(15deg); }

.mobile-menu-btn {
  display: none; flex-direction: column; gap: 5px; background: none;
  border: none; cursor: pointer; padding: 6px;
}
.hbg-line { width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: all var(--transition); }

.mobile-menu {
  display: none; position: fixed; inset: 64px 0 0 0;
  background: var(--bg-base); border-top: 1px solid var(--border-subtle);
  overflow-y: auto; padding: var(--space-5); z-index: 99;
}
.mobile-menu.mobile-menu-open { display: block; }
.mobile-section { margin-bottom: var(--space-6); }
.mobile-section-title { font-size: 11px; font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-muted); margin-bottom: var(--space-3); }
.mobile-links-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 4px; }
.mobile-link { padding: 8px 12px; border-radius: var(--radius-sm); font-size: 13px; color: var(--text-secondary); text-decoration: none; display: block; }
.mobile-link:hover { background: var(--bg-surface-2); color: var(--green-mid); }
.mobile-currency { display: flex; gap: 8px; flex-wrap: wrap; padding-top: var(--space-4); border-top: 1px solid var(--border-subtle); }

/* ── Container ──────────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-5); }
.grain-overlay {
  position: fixed; inset: 0; pointer-events: none; z-index: 9998; opacity: 0.28;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='1'/%3E%3C/svg%3E");
  background-size: 200px;
}

@media (max-width: 1024px) {
  .navbar-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .currency-selector { display: none; }
}