:root {
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-pill: 999px;

  --shadow-soft: 0 10px 30px rgba(2, 6, 23, 0.08);
  --shadow-md: 0 14px 36px rgba(15, 23, 42, 0.14);
  --shadow-strong: 0 18px 48px rgba(15, 23, 42, 0.22);

  --transition-fast: .18s ease;
  --transition-normal: .28s ease;
  --transition-slow: .4s ease;

  --violet-950: #2e1065;
  --violet-900: #4c1d95;
  --violet-800: #5b21b6;
  --violet-700: #6d28d9;
  --violet-600: #7c3aed;
  --violet-500: #8b5cf6;
  --violet-400: #a78bfa;
  --violet-300: #c4b5fd;

  --fuchsia-500: #d946ef;
  --sky-500: #0ea5e9;
  --cyan-400: #22d3ee;
  --green-500: #10b981;
  --red-500: #ef4444;
  --amber-500: #f59e0b;
  --blue-500: #3b82f6;

  /* Tema claro por defecto real */
  --bg: #f6f8ff;
  --bg2: #ffffff;
  --bg3: #eef2ff;
  --bg4: #dde7ff;
  --bg5: #f8faff;

  --text: #0f172a;
  --t2: #334155;
  --t3: #64748b;

  --border: rgba(124, 58, 237, 0.16);
  --border-strong: rgba(124, 58, 237, 0.30);

  --primary: var(--violet-600);
  --primary-2: var(--fuchsia-500);
  --primary-3: var(--sky-500);
  --primary-soft: rgba(124, 58, 237, 0.10);

  --success: var(--green-500);
  --success-soft: rgba(16, 185, 129, 0.12);

  --error: var(--red-500);
  --error-soft: rgba(239, 68, 68, 0.10);

  --warn: var(--amber-500);
  --warn-soft: rgba(245, 158, 11, 0.12);

  --info: var(--blue-500);
  --info-soft: rgba(59, 130, 246, 0.10);

  --card-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  --theme-glow: 0 10px 35px rgba(124, 58, 237, 0.20);
  --theme-ring: rgba(139, 92, 246, 0.25);
  --theme-surface: rgba(255, 255, 255, 0.76);
  --theme-track: linear-gradient(135deg, rgba(124,58,237,.12), rgba(14,165,233,.12));
}

:root[data-theme="light"] {
  --bg: #f6f8ff;
  --bg2: #ffffff;
  --bg3: #eef2ff;
  --bg4: #dde7ff;
  --bg5: #f8faff;

  --text: #0f172a;
  --t2: #334155;
  --t3: #64748b;

  --border: rgba(124, 58, 237, 0.16);
  --border-strong: rgba(124, 58, 237, 0.30);

  --primary: var(--violet-600);
  --primary-2: var(--fuchsia-500);
  --primary-3: var(--sky-500);
  --primary-soft: rgba(124, 58, 237, 0.10);

  --success: var(--green-500);
  --success-soft: rgba(16, 185, 129, 0.12);

  --error: var(--red-500);
  --error-soft: rgba(239, 68, 68, 0.10);

  --warn: var(--amber-500);
  --warn-soft: rgba(245, 158, 11, 0.12);

  --info: var(--blue-500);
  --info-soft: rgba(59, 130, 246, 0.10);

  --card-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  --theme-glow: 0 10px 35px rgba(124, 58, 237, 0.20);
  --theme-ring: rgba(139, 92, 246, 0.25);
  --theme-surface: rgba(255, 255, 255, 0.76);
  --theme-track: linear-gradient(135deg, rgba(124,58,237,.12), rgba(14,165,233,.12));
}

:root[data-theme="dark"] {
  --bg: #09090f;
  --bg2: #151521;
  --bg3: #222235;
  --bg4: #2f2f49;
  --bg5: #12121b;

  --text: #fafafa;
  --t2: #c2c8d3;
  --t3: #8f97a8;

  --border: rgba(139, 92, 246, 0.18);
  --border-strong: rgba(139, 92, 246, 0.34);

  --primary: var(--violet-500);
  --primary-2: var(--fuchsia-500);
  --primary-3: var(--cyan-400);
  --primary-soft: rgba(124, 58, 237, 0.14);

  --success: #34d399;
  --success-soft: rgba(52, 211, 153, 0.10);

  --error: #f87171;
  --error-soft: rgba(248, 113, 113, 0.10);

  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.12);

  --info: #60a5fa;
  --info-soft: rgba(96, 165, 250, 0.10);

  --card-shadow: 0 12px 30px rgba(0, 0, 0, 0.30);
  --theme-glow: 0 12px 42px rgba(139, 92, 246, 0.28);
  --theme-ring: rgba(168, 85, 247, 0.34);
  --theme-surface: rgba(21, 21, 33, 0.78);
  --theme-track: linear-gradient(135deg, rgba(124,58,237,.18), rgba(34,211,238,.16));
}

html, body {
  background:
    radial-gradient(circle at top left, rgba(124,58,237,.06), transparent 28%),
    radial-gradient(circle at top right, rgba(14,165,233,.05), transparent 24%),
    var(--bg);
  color: var(--text);
}

/* Utilidades globales reutilizables */
.theme-toggle {
  appearance: none;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: .7rem;
  min-width: 136px;
  height: 52px;
  padding: .42rem .5rem .42rem .85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background:
    linear-gradient(135deg, var(--theme-surface), rgba(255,255,255,.02)),
    var(--theme-track);
  color: var(--text);
  font-size: .88rem;
  font-weight: 800;
  letter-spacing: .01em;
  cursor: pointer;
  transition:
    transform var(--transition-fast),
    box-shadow var(--transition-normal),
    border-color var(--transition-fast),
    background var(--transition-normal);
  box-shadow: var(--card-shadow), var(--theme-glow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
}

.theme-toggle::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,.18), rgba(255,255,255,0));
  pointer-events: none;
}

.theme-toggle::after {
  content: "";
  position: absolute;
  width: 88px;
  height: 88px;
  right: -24px;
  top: -32px;
  background: radial-gradient(circle, rgba(255,255,255,.22), transparent 62%);
  pointer-events: none;
}

.theme-toggle:hover {
  transform: translateY(-2px) scale(1.01);
  border-color: var(--primary);
  box-shadow: var(--shadow-md), var(--theme-glow);
}

.theme-toggle:active {
  transform: translateY(0) scale(.985);
}

.theme-toggle:focus-visible {
  outline: none;
  box-shadow:
    var(--card-shadow),
    var(--theme-glow),
    0 0 0 4px var(--theme-ring);
}

.theme-toggle .theme-toggle-label {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  white-space: nowrap;
}

.theme-toggle .theme-toggle-icon {
  position: relative;
  z-index: 1;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-2));
  color: #fff;
  font-size: 1rem;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25), 0 6px 18px rgba(124,58,237,.32);
  transition: transform var(--transition-normal), background var(--transition-normal);
}

.theme-toggle:hover .theme-toggle-icon {
  transform: rotate(-10deg) scale(1.05);
}

:root[data-theme="dark"] .theme-toggle .theme-toggle-icon {
  background: linear-gradient(135deg, var(--primary-3), var(--primary));
}

.theme-toggle-floating {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 1000;
}

.theme-chip {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: .4rem .8rem;
  background: var(--bg2);
  color: var(--t2);
  font-size: .78rem;
  font-weight: 700;
  box-shadow: var(--card-shadow);
}

.theme-hidden {
  display: none !important;
}

@media (max-width: 640px) {
  .theme-toggle {
    min-width: 124px;
    height: 48px;
    padding: .35rem .45rem .35rem .75rem;
    font-size: .82rem;
  }

  .theme-toggle .theme-toggle-icon {
    width: 34px;
    height: 34px;
    font-size: .95rem;
  }

  .theme-toggle-floating {
    right: 12px;
    bottom: 12px;
  }
}