:root {
    --navy: #1D2E7B;
    --tangerine: #F57215;
    --emerald: #046A38;
    --gold: #D4AF37;
    --bg-light: #F4F7F6;
    --white: #FFFFFF;
    --text-dark: #333333;
    --text-muted: #777777;
    --shadow: 0 4px 12px rgba(0,0,0,0.05);
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', sans-serif; }
body { background-color: var(--bg-light); color: var(--text-dark); overflow-x: hidden; }

/* Loader */
.global-loader { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--white); z-index: 9999; display: flex; justify-content: center; align-items: center; transition: opacity 0.5s; }
.global-loader.hidden { opacity: 0; pointer-events: none; }
.spinner { border: 4px solid rgba(29, 46, 123, 0.2); border-top: 4px solid var(--tangerine); border-radius: 50%; width: 40px; height: 40px; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* Login Page */
.auth-wrapper { display: flex; min-height: 100vh; align-items: center; justify-content: center; padding: 20px; background: linear-gradient(135deg, var(--navy) 0%, #152259 100%); }
.auth-card { background: var(--white); border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.2); width: 100%; max-width: 420px; overflow: hidden; transform: translateY(0); animation: slideUp 0.5s ease; }
.auth-header { background: var(--navy); color: var(--white); padding: 30px 20px; text-align: center; border-bottom: 4px solid var(--tangerine); }
.auth-header h2 { font-weight: 700; margin-bottom: 5px; }
.auth-header p { font-size: 14px; opacity: 0.8; }
.auth-body { padding: 30px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; color: var(--navy); }
.form-control { width: 100%; padding: 12px 15px; border: 1px solid #ddd; border-radius: 8px; font-size: 15px; transition: var(--transition); }
.form-control:focus { outline: none; border-color: var(--tangerine); box-shadow: 0 0 0 3px rgba(245, 114, 21, 0.1); }
.btn-primary { width: 100%; background: var(--tangerine); color: var(--white); border: none; padding: 12px; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.btn-primary:hover { background: #e0620e; transform: translateY(-2px); }

/* Admin Layout (Sidebar & Main) */
.admin-layout { display: flex; min-height: 100vh; }
.sidebar { width: 260px; background: var(--navy); color: var(--white); display: flex; flex-direction: column; transition: var(--transition); z-index: 100; }
.sidebar-brand { padding: 20px; font-size: 20px; font-weight: 700; border-bottom: 1px solid rgba(255,255,255,0.1); color: var(--tangerine); text-align: center; }
.sidebar-menu { list-style: none; padding: 20px 0; flex-grow: 1; }
.sidebar-menu li a { display: flex; align-items: center; padding: 15px 25px; color: rgba(255,255,255,0.7); text-decoration: none; font-size: 15px; transition: var(--transition); }
.sidebar-menu li a i { margin-right: 15px; width: 20px; text-align: center; }
.sidebar-menu li a:hover, .sidebar-menu li a.active { background: rgba(255,255,255,0.05); color: var(--tangerine); border-left: 4px solid var(--tangerine); }
.main-content { flex-grow: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { background: var(--white); padding: 15px 30px; display: flex; justify-content: space-between; align-items: center; box-shadow: var(--shadow); }
.content-area { padding: 30px; overflow-y: auto; }

/* Dashboard Cards */
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-bottom: 30px; }
.stat-card { background: var(--white); padding: 25px; border-radius: 10px; box-shadow: var(--shadow); display: flex; align-items: center; justify-content: space-between; border-left: 5px solid var(--navy); }
.stat-card.emerald { border-left-color: var(--emerald); }
.stat-card.tangerine { border-left-color: var(--tangerine); }
.stat-card.gold { border-left-color: var(--gold); }
.stat-info h4 { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.stat-info h2 { font-size: 28px; color: var(--navy); margin-top: 5px; }
.stat-icon { font-size: 40px; color: rgba(29, 46, 123, 0.1); }

/* Utilities & Animations */
.text-center { text-align: center; }
.mt-3 { margin-top: 15px; }
.fade-in { animation: fadeIn 0.4s ease forwards; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* Mobile Responsive */
@media (max-width: 768px) {
    .admin-layout { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; justify-content: space-between; padding: 10px 20px; align-items: center; }
    .sidebar-menu { display: none; } /* Hamburger disembunyikan untuk simplicity Tahap 3 */
    .topbar { padding: 15px 20px; }
    .content-area { padding: 20px; }
}
/* Custom Modal Dialog */
.gks-modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 10000; display: flex; justify-content: center; align-items: center; opacity: 0; visibility: hidden; transition: var(--transition); backdrop-filter: blur(3px); }
.gks-modal-overlay.active { opacity: 1; visibility: visible; }
.gks-modal { background: var(--white); width: 90%; max-width: 400px; border-radius: 12px; box-shadow: 0 15px 30px rgba(0,0,0,0.2); transform: translateY(-20px) scale(0.95); transition: var(--transition); overflow: hidden; }
.gks-modal-overlay.active .gks-modal { transform: translateY(0) scale(1); }
.gks-modal-header { padding: 15px 20px; color: var(--white); font-weight: 600; display: flex; align-items: center; gap: 10px; }
.gks-modal-header.error { background: #e74c3c; }
.gks-modal-header.success { background: var(--emerald); }
.gks-modal-header.info { background: var(--navy); }
.gks-modal-body { padding: 20px; font-size: 15px; color: var(--text-dark); line-height: 1.5; text-align: center; }
.gks-modal-footer { padding: 15px 20px; text-align: center; background: #f9f9f9; border-top: 1px solid #eee; }
.btn-modal { background: var(--navy); color: var(--white); border: none; padding: 10px 25px; border-radius: 6px; cursor: pointer; font-weight: 600; transition: var(--transition); }
.btn-modal:hover { background: var(--tangerine); }