:root {
    --primary-color: #00d4ff;
    --bg-dark: #0b0f1a;
    --bg-card: #131a2a;
    --bg-sidebar: #121826;
    --text-light: #888080;
    --text-muted: #bbb;
    --success: #00ff95;
    --danger: #ff5757;
    --warning: #ffa500;
}

[data-theme="light"] {
    --bg-dark: #f5f5f5;
    --bg-card: #ffffff;
    --bg-sidebar: #ffffff;
    --text-light: #2c2b2b;
    --text-muted: #666;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    transition: background-color 0.3s ease;
}

/* Sidebar */
.sidebar {
    width: 250px;
    background: var(--bg-sidebar);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    padding: 20px;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.sidebar h2 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-align: center;
}

.sidebar nav a {
    display: block;
    color: var(--text-muted);
    text-decoration: none;
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 8px;
    transition: all 0.3s ease;
}

.sidebar nav a:hover,
.sidebar nav a.active {
    background-color: var(--primary-color);
    color: var(--bg-dark);
}

.sidebar nav a i {
    margin-right: 10px;
    width: 20px;
}

/* Header/Topbar */
.topbar {
    background-color: var(--bg-card);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 90;
}

.topbar h1 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.location-selector {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    cursor: pointer;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-light);
}

/* Main Content */
.main-content {
    margin-left: 250px;
    padding: 20px 30px;
    min-height: 100vh;
}

/* Cards */
.card {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.card-header {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.card-header h2 {
    color: var(--primary-color);
    font-size: 1.3rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    backdrop-filter: blur(12px);
    transition: transform 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card h3 {
    font-size: 2.5rem;
    margin: 0;
    color: var(--primary-color);
}

.stat-card p {
    margin: 10px 0 0;
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.stat-card.success h3 {
    color: var(--success);
}

.stat-card.danger h3 {
    color: var(--danger);
}

.stat-card.warning h3 {
    color: var(--warning);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

thead {
    background: rgba(255, 255, 255, 0.05);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
    color: var(--primary-color);
    font-weight: 600;
}

tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: #00bfea;
}

.btn-success {
    background: var(--success);
    color: var(--bg-dark);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-light);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid rgba(255, 255, 255, 0);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    font-size: 0.95rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

select.form-control {
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 12px 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: rgba(0, 255, 149, 0.2);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-danger {
    background: rgba(255, 87, 87, 0.2);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.alert-warning {
    background: rgba(255, 165, 0, 0.2);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.alert-info {
    background: rgba(0, 212, 255, 0.2);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
}

.modal-footer {
    margin-top: 25px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background: var(--success);
    color: var(--bg-dark);
}

.badge-danger {
    background: var(--danger);
    color: white;
}

.badge-warning {
    background: var(--warning);
    color: white;
}

.badge-info {
    background: var(--primary-color);
    color: var(--bg-dark);
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-dark);
}

.login-box {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 30px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}