/* ======================================================
   THEME SYSTEM
   Light / Dark Design Tokens
====================================================== */

/* =====================
   LIGHT THEME (DEFAULT)
===================== */
:root {
  /* Backgrounds */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-muted: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.65);

  /* Text */
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  /* Borders & Shadows */
  --border-soft: rgba(148, 163, 184, 0.25);
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 10px 20px rgba(0, 0, 0, 0.12);

  /* Accent */
  --accent: #3b82f6;
  --accent-alt: #06b6d4;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  /* Motion */
  --ease-fast: 0.15s ease;
  --ease-normal: 0.3s ease;
}

/* =====================
   DARK THEME
===================== */
[data-theme="dark"] {
  --bg-main: #0f172a;
  --bg-surface: #1e293b;
  --bg-muted: #334155;
  --bg-glass: rgba(15, 23, 42, 0.65);

  --text-main: #f8fafc;
  --text-muted: #cbd5e1;
  --text-inverse: #0f172a;

  --border-soft: rgba(100, 116, 139, 0.35);
  --shadow-sm: 0 6px 12px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 14px 30px rgba(0, 0, 0, 0.6);
}

/* =====================
   GLOBAL APPLICATION
===================== */
body {
  background: var(--bg-main);
  color: var(--text-main);
  transition: background var(--ease-normal), color var(--ease-normal);
}

/* Glass surface utility */
.surface-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-sm);
}

/* Card surface */
.surface-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-md);
}

/* Text helpers */
.text-muted {
  color: var(--text-muted);
}

/* =====================
   THEME TOGGLE
===================== */
.theme-toggle-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.theme-toggle-btn {
  width: 58px;
  height: 30px;
  border-radius: 999px;
  background: var(--bg-glass);
  border: 1px solid var(--border-soft);
  position: relative;
  cursor: pointer;
}

.theme-indicator {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--text-inverse);
  position: absolute;
  top: 2px;
  left: 2px;
  transition: transform var(--ease-normal);
  box-shadow: var(--shadow-sm);
}

.theme-toggle-btn[data-theme="dark"] .theme-indicator {
  transform: translateX(28px);
}

.theme-toggle-label {
  font-size: 12px;
  color: var(--text-muted);
}

/* =====================
   BUTTON THEMING
===================== */
.btn-primary,
.weather-component__button,
.weather-component__button-microphone {
  background: var(--accent);
  border: none;
  color: var(--text-inverse);
  transition: transform var(--ease-fast), background var(--ease-fast);
}

.btn-primary:hover,
.weather-component__button:hover,
.weather-component__button-microphone:hover {
  background: var(--accent-alt);
  transform: translateY(-2px);
}

/* =====================
   TOAST + MODAL THEMING
===================== */
.toast {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-md);
}

.modal-overlay {
  background: rgba(0, 0, 0, 0.6);
}

.safety-modal {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-md);
}

/* =====================
   ACCESSIBILITY
===================== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}