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

/* ——————————————————————————————
   Tokens — dark (default)
   —————————————————————————————— */
:root {
  /* Surfaces */
  --bg: #0b0b14;
  --bg-secondary: #101020;
  --surface-1: #15152a;
  --surface-2: #1c1c36;
  --surface-3: #242444;
  --surface-hover: #1e1e3c;

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --hairline: rgba(255, 255, 255, 0.08);

  /* Text */
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.6);
  --text-tertiary: rgba(255, 255, 255, 0.38);

  /* Accents */
  --accent: #818cf8;
  --accent-secondary: #22d3ee;
  --accent-glow: rgba(129, 140, 248, 0.22);

  /* Brand gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-green: linear-gradient(135deg, #10b981, #34d399);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.5);

  /* State */
  --on-color: #818cf8;
  --off-color: rgba(255, 255, 255, 0.15);

  /* Radius */
  --radius-xs: 8px;
  --radius-sm: 12px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;

  /* Legacy aliases */
  --sidebar-bg: var(--bg);
  --card-bg: var(--surface-1);
  --card-bg-hover: var(--surface-2);
  --card-border: var(--border-subtle);
  --card-border-hover: var(--border-strong);
  --glass: var(--surface-1);
  --glass-border: var(--border-subtle);
}

/* ——————————————————————————————
   Tokens — light
   —————————————————————————————— */
.light {
  --bg: #f6f7fb;
  --bg-secondary: #eef0f5;
  --surface-1: #ffffff;
  --surface-2: #f3f4f8;
  --surface-3: #eaebf0;
  --surface-hover: #f8f9fc;

  --border-subtle: rgba(15, 20, 40, 0.06);
  --border-strong: rgba(15, 20, 40, 0.12);
  --hairline: rgba(15, 20, 40, 0.08);

  --text-primary: rgba(15, 20, 40, 0.94);
  --text-secondary: rgba(15, 20, 40, 0.62);
  --text-tertiary: rgba(15, 20, 40, 0.38);

  --accent: #5b63e0;
  --accent-secondary: #0891b2;
  --accent-glow: rgba(91, 99, 224, 0.14);

  --shadow-sm: 0 1px 2px rgba(15, 20, 40, 0.05);
  --shadow-md: 0 2px 6px rgba(15, 20, 40, 0.06), 0 12px 28px -8px rgba(15, 20, 40, 0.1);
  --shadow-lg: 0 4px 10px rgba(15, 20, 40, 0.06), 0 24px 60px -12px rgba(15, 20, 40, 0.14);
  --shadow-xl: 0 8px 16px rgba(15, 20, 40, 0.06), 0 40px 100px -24px rgba(15, 20, 40, 0.2);

  --on-color: #5b63e0;
  --off-color: rgba(15, 20, 40, 0.12);
}

/* ——————————————————————————————
   Base
   —————————————————————————————— */
html, body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
}

#__next, main { height: 100%; }

/* ——————————————————————————————
   Aurora
   —————————————————————————————— */
.bg-ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.bg-ambient::before,
.bg-ambient::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
}
.bg-ambient::before {
  width: 560px; height: 560px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  top: -180px; right: -80px;
  animation: float1 22s ease-in-out infinite;
}
.bg-ambient::after {
  width: 480px; height: 480px;
  background: radial-gradient(circle, rgba(139, 92, 246, 0.14) 0%, transparent 70%);
  bottom: -140px; left: -60px;
  animation: float2 27s ease-in-out infinite;
}
.light .bg-ambient::after {
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
}

@keyframes float1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, 40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
@keyframes float2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, -30px) scale(1.1); }
  66% { transform: translate(20px, -10px) scale(0.9); }
}

/* ——————————————————————————————
   Cards
   —————————————————————————————— */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.card-raised {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
.card-hero {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.glass-card {
  background: var(--surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.glass-card:hover { background: var(--surface-hover); }

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

button {
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  font-family: inherit;
  color: inherit;
}
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

::-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(--text-tertiary); }

/* ——————————————————————————————
   Motion
   —————————————————————————————— */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-glow); }
  50% { box-shadow: 0 0 30px var(--accent-glow); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-slide-up { animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards; }

@keyframes fan-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes light-pulse {
  0%, 100% { filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.3)); }
  50% { filter: drop-shadow(0 0 12px rgba(251, 191, 36, 0.6)); }
}
@keyframes device-breathe { 0%, 100% { opacity: 0.7; } 50% { opacity: 1; } }
.fan-spinning { animation: fan-spin 2s linear infinite; }
.light-on-pulse { animation: light-pulse 3s ease-in-out infinite; }
.device-active-breathe { animation: device-breathe 3s ease-in-out infinite; }

@keyframes spin-slow { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes cloud-float { 0%, 100% { transform: translateX(0); } 50% { transform: translateX(4px); } }
@keyframes rain-fall {
  0% { transform: translateY(0); opacity: 0.7; }
  80% { opacity: 0.7; }
  100% { transform: translateY(16px); opacity: 0; }
}
@keyframes snow-fall {
  0% { transform: translateY(0) translateX(0); opacity: 0.9; }
  25% { transform: translateY(5px) translateX(2px); opacity: 0.8; }
  50% { transform: translateY(10px) translateX(-1px); opacity: 0.7; }
  75% { transform: translateY(15px) translateX(3px); opacity: 0.4; }
  100% { transform: translateY(22px) translateX(0); opacity: 0; }
}
@keyframes thunder-flash {
  0%, 100% { opacity: 0; }
  5%, 7% { opacity: 1; }
  6% { opacity: 0.3; }
  50%, 52% { opacity: 0.8; }
  51% { opacity: 0.2; }
}
@keyframes fog-drift {
  0%, 100% { transform: translateX(0); opacity: 0.4; }
  50% { transform: translateX(8px); opacity: 0.6; }
}

/* Weather ambient tints via accent-glow */
.weather-bg-clear   { --accent-glow: rgba(251, 191, 36, 0.18); }
.weather-bg-cloudy  { --accent-glow: rgba(148, 163, 184, 0.18); }
.weather-bg-rain    { --accent-glow: rgba(59, 130, 246, 0.18); }
.weather-bg-snow    { --accent-glow: rgba(186, 230, 253, 0.22); }
.weather-bg-thunder { --accent-glow: rgba(139, 92, 246, 0.22); }
.weather-bg-night   { --accent-glow: rgba(67, 56, 202, 0.16); }
.light.weather-bg-clear   { --accent-glow: rgba(234, 169, 27, 0.16); }
.light.weather-bg-cloudy  { --accent-glow: rgba(100, 116, 139, 0.14); }
.light.weather-bg-rain    { --accent-glow: rgba(37, 99, 235, 0.14); }
.light.weather-bg-snow    { --accent-glow: rgba(125, 211, 252, 0.22); }
.light.weather-bg-thunder { --accent-glow: rgba(109, 40, 217, 0.14); }
.light.weather-bg-night   { --accent-glow: rgba(55, 48, 163, 0.14); }