:root {
  /* --- 2026 "AIRY" PALETTE --- */
  
  /* Arkaplanlar */
  --bg-body: #f8fafc;        /* Slate-50 */
  --bg-surface: #ffffff;     /* Saf beyaz */
  --bg-surface-hover: #f1f5f9;
  --bg-glass: rgba(255, 255, 255, 0.7);
  --bg-glass-heavy: rgba(255, 255, 255, 0.9);
  --bg-border: #e2e8f0;
  --bg-pinned: #fffbf0;      /* Sabit konu arkaplanı (Light) */

  /* Metin Renkleri */
  --text-main: #0f172a;      /* Slate-900 */
  --text-muted: #64748b;     /* Slate-500 */
  --text-dim: #94a3b8;       /* Slate-400 */
  --text-inverse: #ffffff;

  /* Marka Renkleri (Indigo & Violet) */
  --primary: #4f46e5;        /* Indigo-600 */
  --primary-hover: #4338ca;  /* Indigo-700 */
  --primary-soft: rgba(79, 70, 229, 0.08);
  --primary-ring: rgba(79, 70, 229, 0.3);

  /* Aksiyon & Durumlar */
  --accent: #0ea5e9;         /* Sky-500 */
  --success: #10b981;        /* Emerald-500 */
  --warning: #f59e0b;        /* Amber-500 */
  --danger: #ef4444;         /* Red-500 */
  --danger-soft: rgba(239, 68, 68, 0.1);

  /* Alert Backgrounds (Light) */
  --bg-danger-subtle: #fef2f2;
  --border-danger-subtle: #fecaca;
  --text-danger-strong: #991b1b;
  
  --bg-success-subtle: #f0fdf4;
  --border-success-subtle: #bbf7d0;
  --text-success-strong: #166534;

  /* Sınırlar (Borders) */
  --border-subtle: #e2e8f0;
  --border-focus: #cbd5e1;

  /* --- TYPOGRAPHY --- */
  --font-main: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  
  /* --- SPACING & LAYOUT --- */
  --header-height: 70px;
  --header-height-mobile: 60px;
  
  /* UPDATED: Sidebar width reduced from 280px to 230px */
  --sidebar-width: 230px;
  
  --container-max: 1100px;
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* --- SHAPES --- */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* --- DEPTH (Shadows) --- */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  
  --backdrop-blur: blur(16px);
  --transition-fast: 200ms ease;
  --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* --- LAYERS (Z-Index) --- */
  --z-back: -1;
  --z-normal: 1;
  --z-sticky: 100;
  --z-header: 800;
  --z-overlay: 900;
  --z-modal: 1000;
  --z-toast: 1100;
}

/* DARK MODE */
[data-theme="dark"] {
  --bg-body: #0f172a;        /* Slate-900 */
  --bg-surface: #1e293b;     /* Slate-800 */
  --bg-surface-hover: #334155;
  --bg-glass: rgba(15, 23, 42, 0.8);
  --bg-glass-heavy: rgba(15, 23, 42, 0.95);
  --bg-border: #334155;
  --bg-pinned: rgba(245, 158, 11, 0.1); /* Dark mode için pinned bg */

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --border-subtle: #334155; /* Daha belirgin sınır */
  --border-focus: #475569;

  --primary: #6366f1;        /* Indigo-500 */
  --primary-hover: #818cf8;
  --primary-soft: rgba(99, 102, 241, 0.15);
  
  /* Alert Overrides for Dark Mode */
  --bg-danger-subtle: rgba(239, 68, 68, 0.1);
  --border-danger-subtle: rgba(239, 68, 68, 0.3);
  --text-danger-strong: #fca5a5;
  
  --bg-success-subtle: rgba(16, 185, 129, 0.1);
  --border-success-subtle: rgba(16, 185, 129, 0.3);
  --text-success-strong: #86efac;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
}