:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #06b6d4;
    --light: #f8fafc;
    --dark: #1e293b;
    --border: #e2e8f0;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 400px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box h2 {
    color: var(--dark);
    margin-bottom: 30px;
    text-align: center;
    font-size: 28px;
}

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

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

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: white;
    width: 100%;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.3);
}

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

.btn-success:hover {
    background: #059669;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(16, 185, 129, 0.3);
}

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

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(239, 68, 68, 0.3);
}

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

.btn-warning:hover {
    background: #d97706;
}

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

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

.btn-secondary:hover {
    background: #475569;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(100, 116, 139, 0.3);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

/* Dashboard Layout */
.dashboard {
    display: flex;
    min-height: 100vh;
    background: var(--light);
}

.sidebar {
    width: 260px;
    background: white;
    box-shadow: 2px 0 10px rgba(0,0,0,0.1);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
}

.sidebar-header {
    padding: 25px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
}

.sidebar-header h3 {
    font-size: 20px;
    margin-bottom: 5px;
}

.sidebar-header p {
    font-size: 12px;
    opacity: 0.9;
}

.sidebar-menu {
    padding: 20px 0;
}

.menu-item {
    display: block;
    padding: 15px 25px;
    color: var(--dark);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.menu-item:hover, .menu-item.active {
    background: var(--light);
    border-left-color: var(--primary);
    color: var(--primary);
}

.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 30px;
}

.topbar {
    background: white;
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar h1 {
    color: var(--dark);
    font-size: 24px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--primary);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.stat-card.success::before {
    background: var(--success);
}

.stat-card.warning::before {
    background: var(--warning);
}

.stat-card.info::before {
    background: var(--info);
}

.stat-card h3 {
    color: var(--secondary);
    font-size: 14px;
    margin-bottom: 10px;
}

.stat-card .value {
    font-size: 32px;
    font-weight: bold;
    color: var(--dark);
}

/* Table */
.card {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-header h2 {
    color: var(--dark);
    font-size: 20px;
}

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th {
    background: var(--light);
    padding: 15px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid var(--border);
}

table td {
    padding: 15px;
    border-bottom: 1px solid var(--border);
    color: var(--dark);
}

table tr:hover {
    background: var(--light);
}

/* Badge */
.badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.badge-success {
    background: #d1fae5;
    color: var(--success);
}

.badge-danger {
    background: #fee2e2;
    color: var(--danger);
}

.badge-warning {
    background: #fef3c7;
    color: var(--warning);
}

.badge-info {
    background: #cffafe;
    color: var(--info);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    animation: fadeIn 0.3s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal.active {
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideDown 0.3s;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    color: var(--dark);
}

.close {
    font-size: 28px;
    font-weight: bold;
    color: var(--secondary);
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--danger);
}

/* Alert */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    animation: slideDown 0.3s;
}

.alert-success {
    background: #d1fae5;
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-danger {
    background: #fee2e2;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.alert-warning {
    background: #fef3c7;
    color: var(--warning);
    border-left: 4px solid var(--warning);
}

/* Search Bar */
.search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-bar input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--primary);
}

/* Chart Container */
.chart-container {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
    min-height: 300px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar-header h3, .sidebar-header p, .menu-item span {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}