/* =================================================================
   Sofapotato — Premium Dark Design System
   ================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600;700&family=Noto+Sans+TC:wght@400;500;700;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Surfaces */
  --bg-0: #0a0a0a;
  --bg-1: #111111;
  --bg-2: #161616;
  --bg-3: #1c1c1c;
  --bg-4: #232323;
  --border: #262626;
  --border-strong: #383838;
  --border-faint: #1d1d1d;

  /* Text */
  --text-1: #f5f5f5;
  --text-2: #a8a8a8;
  --text-3: #6b6b6b;
  --text-4: #4a4a4a;

  /* Brand */
  --orange: #ff7a18;
  --orange-2: #ff9544;
  --orange-deep: #d65a00;
  --orange-glow: rgba(255, 122, 24, 0.18);
  --orange-glow-strong: rgba(255, 122, 24, 0.35);
  --gold: #f4b942;
  --gold-2: #f7cc6c;

  /* Status */
  --success: #22c55e;
  --success-glow: rgba(34, 197, 94, 0.15);
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;

  /* Type */
  --font-display: 'Space Grotesk', 'Noto Sans TC', sans-serif;
  --font-body: 'Inter', 'Noto Sans TC', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Radius */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 20px;

  /* Shadow */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.6);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.55);
  --shadow-orange: 0 12px 40px var(--orange-glow);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg-0);
  color: var(--text-1);
  font-family: var(--font-body);
  font-feature-settings: 'cv11', 'ss01';
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 15px;
  line-height: 1.55;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

/* ---------- Typography ---------- */
.h-display {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.05;
}
.h-mono {
  font-family: var(--font-mono);
  letter-spacing: 0;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}
.muted { color: var(--text-2); }
.dim { color: var(--text-3); }

/* ---------- Layout ---------- */
.container {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-tight { max-width: 1120px; margin: 0 auto; padding: 0 32px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
  cursor: pointer;
  letter-spacing: -0.005em;
}
.btn-primary {
  background: var(--orange);
  color: #0a0a0a;
  box-shadow: 0 0 0 0 var(--orange-glow);
}
.btn-primary:hover {
  background: var(--orange-2);
  box-shadow: 0 8px 28px var(--orange-glow-strong);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--text-1);
  border-color: var(--border-strong);
}
.btn-ghost:hover {
  background: var(--bg-2);
  border-color: #4a4a4a;
}
.btn-subtle {
  background: var(--bg-2);
  color: var(--text-1);
  border-color: var(--border);
}
.btn-subtle:hover {
  background: var(--bg-3);
}
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn-lg { padding: 14px 26px; font-size: 15px; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-1);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.card-elev {
  background: linear-gradient(180deg, var(--bg-2) 0%, var(--bg-1) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
}
.card-hover { transition: all 0.2s ease; }
.card-hover:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
}

/* ---------- Pills / Tags ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  font-size: 11px;
  font-weight: 500;
  color: var(--text-2);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.pill-orange {
  background: var(--orange-glow);
  border-color: var(--orange-glow-strong);
  color: var(--orange-2);
}
.pill-success {
  background: var(--success-glow);
  border-color: rgba(34, 197, 94, 0.35);
  color: var(--success);
}
.pill-gold {
  background: rgba(244, 185, 66, 0.12);
  border-color: rgba(244, 185, 66, 0.3);
  color: var(--gold);
}

/* ---------- Status Dot ---------- */
.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--success);
  position: relative;
}
.dot::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 999px;
  background: var(--success);
  opacity: 0.4;
  animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(0.7); opacity: 0.4; }
  50% { transform: scale(1.4); opacity: 0; }
}

/* ---------- Grain ---------- */
.grain::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.08 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: 0.45;
  mix-blend-mode: overlay;
  z-index: 1;
}

/* ---------- Glow Mesh ---------- */
.mesh-orange {
  position: absolute;
  pointer-events: none;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.4;
  background: radial-gradient(circle, var(--orange) 0%, transparent 60%);
}

/* ---------- Divider ---------- */
.hr {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border) 20%, var(--border) 80%, transparent);
  border: none;
}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb { background: var(--bg-3); border-radius: 999px; border: 2px solid var(--bg-0); }
::-webkit-scrollbar-thumb:hover { background: var(--bg-4); }

/* ---------- Section ---------- */
.section { padding: 96px 0; position: relative; }
.section-sm { padding: 56px 0; position: relative; }

/* Selection */
::selection { background: var(--orange); color: #0a0a0a; }

/* Grid bg */
.grid-bg {
  background-image:
    linear-gradient(var(--border-faint) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-faint) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center;
}

/* Fade mask edges */
.fade-x {
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.fade-y {
  mask-image: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 8%, #000 92%, transparent);
}