/* Design System & Theme Variables - KostKu Management System (Biru Dongker / Deep Navy Theme) */
:root {
  /* Brand & Theme Colors - Dominan Biru Dongker */
  --primary: #1e3a8a;               /* Biru Dongker Utama (Deep Navy) */
  --primary-hover: #172554;         /* Midnight Navy Gelap */
  --primary-light: #eff6ff;         /* Es Biru Lembut */
  --primary-subtle: #dbeafe;        /* Biru Dongker Aksen Tipis */
  --primary-accent: #2563eb;        /* Royal Blue Aksen Tombol */
  --primary-glow: rgba(30, 58, 138, 0.32);

  --secondary: #0284c7;             /* Cerulean Blue */
  --secondary-hover: #0369a1;
  --secondary-light: #f0f9ff;

  --accent: #f59e0b;                /* Amber Gold (Kontras Elegan terhadap Navy) */
  --accent-light: #fef3c7;

  --danger: #ef4444;                /* Danger Red */
  --danger-hover: #dc2626;
  --danger-light: #fee2e2;

  --success: #10b981;               /* Emerald Hijau untuk Status Lunas / Tersedia */
  --success-light: #ecfdf5;

  --info: #0ea5e9;
  --info-light: #e0f2fe;

  /* Neutral & Dark Accents */
  --bg-main: #f1f5f9;               /* Slate Light Gray-Blue background */
  --bg-sidebar: #090e1f;            /* Deep Midnight Navy Dongker */
  --bg-sidebar-hover: #131f42;      /* Navy Blue Hover */
  --bg-sidebar-active: #1e3a8a;     /* Rich Navy */
  --bg-card: #ffffff;
  --bg-card-subtle: #f8fafc;

  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-subtle: #f1f5f9;
  --border-focus: #2563eb;

  --text-main: #0f172a;             /* Dark Navy Charcoal */
  --text-muted: #475569;            /* Slate Muted */
  --text-light: #64748b;
  --text-white: #ffffff;

  /* Room Status Colors */
  --status-available-bg: #eff6ff;
  --status-available-text: #1d4ed8;
  --status-occupied-bg: #fee2e2;
  --status-occupied-text: #991b1b;
  --status-maintenance-bg: #fef3c7;
  --status-maintenance-text: #92400e;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 10px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 10px 20px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
  --shadow-glow: 0 8px 24px -4px rgba(30, 58, 138, 0.35);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}