:root {
    --bg-main: #0a0e17;
    --bg-panel: rgba(18, 24, 43, 0.65);
    --bg-sidebar: rgba(18, 24, 43, 0.8);
    --bg-topbar: rgba(10, 14, 23, 0.8);
    --bg-input: rgba(0,0,0,0.3);
    --bg-hover: rgba(255,255,255,0.05);
    --bg-dropdown: rgba(18, 24, 43, 0.95);
    --bg-modal: rgba(0,0,0,0.7);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    
    --accent: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --danger: #ef4444;
    
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    --gradient-1: rgba(59, 130, 246, 0.08);
    --gradient-2: rgba(139, 92, 246, 0.08);
}

body.light-mode {
    --bg-main: #f1f5f9;
    --bg-panel: rgba(255, 255, 255, 0.7);
    --bg-sidebar: rgba(255, 255, 255, 0.85);
    --bg-topbar: rgba(248, 250, 252, 0.85);
    --bg-input: rgba(255,255,255,0.9);
    --bg-hover: rgba(0,0,0,0.05);
    --bg-dropdown: rgba(255, 255, 255, 0.95);
    --bg-modal: rgba(255,255,255,0.5);
    
    --border-color: rgba(0, 0, 0, 0.08);
    --text-main: #0f172a;
    --text-muted: #64748b;
    
    --accent: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.2);
    
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
    
    --gradient-1: rgba(59, 130, 246, 0.15);
    --gradient-2: rgba(139, 92, 246, 0.15);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    background-image: 
        radial-gradient(circle at 15% 50%, var(--gradient-1), transparent 30%),
        radial-gradient(circle at 85% 30%, var(--gradient-2), transparent 30%);
    background-attachment: fixed;
    min-height: 100vh;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    transition: background 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}

/* Landing Page */
.landing-container { display: flex; justify-content: center; align-items: center; min-height: 100vh; }
.login-panel { width: 100%; max-width: 420px; padding: 40px; text-align: center; }
.logo h1 { font-size: 2.2rem; font-weight: 700; margin-bottom: 5px; }
.logo span { color: var(--accent); }
.logo p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 30px; text-transform: uppercase; letter-spacing: 2px; }

.input-group { margin-bottom: 20px; text-align: left; }
.input-group label { display: block; margin-bottom: 8px; font-size: 0.85rem; color: var(--text-muted); }
input[type="text"], input[type="password"] {
    width: 100%; padding: 14px 16px; background: var(--bg-input); border: 1px solid var(--border-color);
    color: var(--text-main); border-radius: 8px; font-family: 'Inter', sans-serif; transition: all 0.3s;
}
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }

.btn-primary {
    width: 100%; padding: 14px; background: linear-gradient(135deg, var(--accent), #8b5cf6); color: white;
    border: none; border-radius: 8px; font-weight: 600; font-size: 1rem; cursor: pointer; transition: all 0.3s; margin-top: 10px;
}
.btn-primary:hover { box-shadow: 0 0 20px var(--accent-glow); transform: translateY(-1px); }

.restricted-notice { margin-top: 25px; font-size: 0.75rem; color: var(--text-muted); }
.alert.error { background: rgba(239, 68, 68, 0.1); border: 1px solid rgba(239, 68, 68, 0.3); color: #fca5a5; padding: 10px; border-radius: 8px; margin-bottom: 20px; font-size: 0.9rem; }

/* Dashboard Layout */
.dashboard-layout { display: flex; height: 100vh; overflow: hidden; }
.sidebar { width: 260px; border-radius: 0; border-right: 1px solid var(--border-color); border-top: none; border-left: none; border-bottom: none; display: flex; flex-direction: column; background: var(--bg-sidebar); transition: background 0.4s ease, border-color 0.4s ease; }
.logo-small { padding: 24px; font-size: 1.8rem; font-weight: 700; text-align: center; border-bottom: 1px solid var(--border-color); }
.logo-small span { color: var(--accent); }

.sidebar nav { padding: 20px 0; display: flex; flex-direction: column; gap: 5px; }
.sidebar nav a { color: var(--text-muted); text-decoration: none; padding: 14px 24px; display: flex; align-items: center; gap: 14px; transition: all 0.2s; font-weight: 500; }
.sidebar nav a:hover, .sidebar nav a.active { color: var(--text-main); background: var(--bg-hover); border-right: 3px solid var(--accent); }
.logout-link { margin-top: auto; color: var(--danger) !important; }

.dashboard-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
.topbar { height: 75px; padding: 0 40px; display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--border-color); background: var(--bg-topbar); backdrop-filter: blur(10px); z-index: 50; transition: background 0.4s ease, border-color 0.4s ease; }

.search-container { position: relative; width: 100%; max-width: 600px; }
#global-search { width: 100%; padding: 14px 24px; background: var(--bg-input); border: 1px solid var(--border-color); border-radius: 30px; color: var(--text-main); font-size: 0.95rem; transition: all 0.3s; }
#global-search:focus { outline: none; background: var(--bg-hover); border-color: var(--accent); box-shadow: var(--glass-shadow); }

.glass-dropdown { position: absolute; top: 100%; left: 0; width: 100%; margin-top: 12px; background: var(--bg-dropdown); backdrop-filter: blur(20px); border: 1px solid var(--border-color); border-radius: 12px; z-index: 100; overflow: hidden; box-shadow: var(--glass-shadow); transition: background 0.4s ease, border-color 0.4s ease; }
.glass-dropdown.hidden { display: none; }
.search-result-item { padding: 14px 24px; cursor: pointer; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; transition: background 0.2s; }
.search-result-item:hover { background: rgba(59, 130, 246, 0.15); }
.search-result-item strong { font-weight: 600; font-size: 1rem; color: var(--text-main); }
.search-result-item span { color: var(--text-muted); font-size: 0.85rem; background: var(--bg-input); padding: 4px 10px; border-radius: 12px; }

.user-profile { display: flex; align-items: center; gap: 15px; }
.status-indicator { width: 10px; height: 10px; background: #10b981; border-radius: 50%; box-shadow: 0 0 10px #10b981; }
.user-profile .avatar { width: 42px; height: 42px; background: linear-gradient(135deg, var(--accent), #8b5cf6); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-weight: 700; font-size: 1.1rem; box-shadow: 0 4px 10px rgba(0,0,0,0.3); }

/* Theme Toggle */
.theme-toggle { background: var(--bg-input); border: 1px solid var(--border-color); border-radius: 30px; width: 60px; height: 32px; position: relative; cursor: pointer; display: flex; align-items: center; justify-content: space-between; padding: 0 5px; font-size: 14px; transition: all 0.3s; margin-right: 15px; }
.theme-toggle .handle { position: absolute; left: 2px; width: 26px; height: 26px; background: white; border-radius: 50%; transition: transform 0.3s cubic-bezier(0.4, 0.0, 0.2, 1); box-shadow: 0 2px 5px rgba(0,0,0,0.2); }
body.light-mode .theme-toggle .handle { transform: translateX(28px); background: white; }

.dashboard-scroll-area { flex: 1; overflow-y: auto; padding: 40px; }

/* Welcome Header */
.welcome-header { display: flex; justify-content: space-between; align-items: center; padding: 30px 40px; margin-bottom: 30px; border-radius: 20px; }
.welcome-text h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 8px; color: var(--text-main); }
.welcome-text h2 span { color: var(--accent); }
.welcome-text p { color: var(--text-muted); font-size: 0.95rem; }

.welcome-kpis { display: flex; gap: 40px; }
.wkpi { display: flex; flex-direction: column; gap: 5px; }
.wkpi-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }
.wkpi-val { font-size: 1.4rem; font-weight: 700; color: var(--text-main); }

/* GridStack Widget styling */
.grid-stack { margin-bottom: 50px; }
.grid-stack-item-content { display: flex; flex-direction: column; padding: 20px; overflow: hidden; }
.widget-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 15px; cursor: move; }
.widget-header h3 { font-size: 1.05rem; font-weight: 600; display: flex; align-items: center; color: var(--text-main); }
.badge { font-size: 0.75rem; background: rgba(59, 130, 246, 0.2); color: var(--accent); padding: 4px 10px; border-radius: 12px; margin-left: 10px; border: 1px solid rgba(59, 130, 246, 0.3); }

.remove-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.4rem; transition: color 0.2s; }
.remove-btn:hover { color: var(--danger); }
.widget-body { flex: 1; position: relative; width: 100%; height: 100%; }

/* Modals */
.modal { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: var(--bg-modal); backdrop-filter: blur(5px); display: flex; justify-content: center; align-items: center; z-index: 1000; transition: background 0.4s ease; }
.modal.hidden { display: none; }
.modal-content { width: 100%; max-width: 550px; padding: 40px; border-radius: 20px; }
.modal-content h2 { margin-bottom: 25px; font-size: 1.4rem; color: var(--text-main); }
.modal-content h2 span { color: var(--accent); }
.kpi-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 25px; max-height: 400px; overflow-y: auto; padding-right: 10px; }
.kpi-list::-webkit-scrollbar { width: 6px; }
.kpi-list::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
.kpi-item { padding: 18px 20px; background: var(--bg-hover); border: 1px solid var(--border-color); border-radius: 12px; cursor: pointer; transition: all 0.2s; display: flex; justify-content: space-between; align-items: center; }
.kpi-item:hover { background: rgba(59, 130, 246, 0.1); border-color: var(--accent); transform: translateX(5px); }
.kpi-item strong { font-size: 1.05rem; color: var(--text-main); }
.kpi-item span { color: var(--text-muted); font-size: 0.85rem; }

.btn-secondary { padding: 12px 24px; background: transparent; border: 1px solid var(--text-muted); color: var(--text-muted); border-radius: 8px; cursor: pointer; transition: all 0.2s; font-weight: 600; }
.btn-secondary:hover { background: var(--bg-hover); color: var(--text-main); border-color: var(--text-main); }

/* Time Toggles */
.widget-controls { display: flex; align-items: center; gap: 15px; }
.time-toggles { display: flex; background: var(--bg-input); border-radius: 8px; overflow: hidden; border: 1px solid var(--border-color); }
.t-btn { background: transparent; border: none; color: var(--text-muted); padding: 5px 10px; font-size: 0.75rem; font-weight: 600; cursor: pointer; transition: all 0.2s; }
.t-btn:hover { color: var(--text-main); background: var(--bg-hover); }
.t-btn.active { background: var(--accent); color: white; }

/* Sub Menu */
.nav-group { display: flex; flex-direction: column; }
.sub-menu { display: flex; flex-direction: column; padding-left: 45px; margin-bottom: 10px; border-left: 2px solid var(--border-color); margin-left: 24px; }
.sub-link { padding: 8px 0; color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: all 0.2s; }
.sub-link:hover { color: var(--text-main); }
.sub-active { color: var(--accent) !important; font-weight: 600; }

/* Responsive Design */
.hamburger { display: none; background: none; border: none; color: var(--text-main); font-size: 1.6rem; cursor: pointer; margin-right: 15px; transition: color 0.3s; }
.hamburger:hover { color: var(--accent); }

@media (max-width: 768px) {
    .dashboard-layout { position: relative; }
    .sidebar { position: fixed; left: -260px; top: 0; bottom: 0; z-index: 1000; transition: left 0.3s ease; box-shadow: 2px 0 10px rgba(0,0,0,0.5); }
    .sidebar.open { left: 0; }
    
    .sidebar-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 999; backdrop-filter: blur(2px); }
    .sidebar-overlay.open { display: block; }
    
    .hamburger { display: block !important; }
    .topbar { padding: 0 15px; }
    .search-container { max-width: 60%; }
    #global-search { padding: 10px 15px; font-size: 0.85rem; }
    
    .dashboard-scroll-area { padding: 15px; }
    
    .welcome-header { padding: 20px; flex-direction: column; align-items: flex-start; gap: 15px; }
    .welcome-kpis { flex-wrap: wrap; gap: 15px; }
    
    .stats-grid { grid-template-columns: 1fr; }
    .grid-stack-item-content { padding: 10px; }
    .admin-table th, .admin-table td { padding: 10px; font-size: 0.8rem; }
}