/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a5276;
    --primary-dark: #154360;
    --secondary-color: #2980b9;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --text-color: #333;
    --light-bg: #f8f9fa;
    --border-color: #dee2e6;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--light-bg);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    color: var(--primary-color);
    font-size: 28px;
}

.login-header p {
    color: #666;
    margin-top: 5px;
}

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

.login-form label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

.login-form input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.3s;
}

.login-form input:focus {
    outline: none;
    border-color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-block {
    width: 100%;
}

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

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

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

.btn-success:hover {
    background: #219a52;
}

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

.btn-warning:hover {
    background: #e08e0b;
}

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

.btn-danger:hover {
    background: #c0392b;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
}

/* Alerts */
.alert {
    padding: 15px;
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.alert-error {
    background: #fde8e8;
    color: var(--danger-color);
    border: 1px solid #f5c6cb;
}

/* Header */
.admin-header {
    background: white;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    text-decoration: none;
    color: var(--primary-color);
}

.admin-nav ul {
    display: flex;
    align-items: center;
    gap: 20px;
    list-style: none;
}

.admin-nav a {
    text-decoration: none;
    color: var(--text-color);
    transition: color 0.3s;
}

.admin-nav a:hover {
    color: var(--secondary-color);
}

/* Dashboard */
.dashboard-container {
    flex: 1;
    padding: 40px 0;
}

.dashboard-header {
    margin-bottom: 30px;
}

.dashboard-header h1 {
    color: var(--primary-color);
    font-size: 32px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
}

.stat-icon {
    font-size: 32px;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light-bg);
    border-radius: 50%;
}

.stat-info h3 {
    font-size: 14px;
    color: #666;
    margin-bottom: 5px;
}

.stat-number {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

/* Registrants Page */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 30px 0;
    flex-wrap: wrap;
    gap: 15px;
}

.page-header h1 {
    color: var(--primary-color);
    font-size: 28px;
}

.search-box form {
    display: flex;
    gap: 10px;
    align-items: center;
}

.search-box input {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    min-width: 300px;
}

/* Table */
.table-responsive {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow-x: auto;
}

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

.table th {
    background: var(--light-bg);
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
}

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

.text-center {
    text-align: center;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-primary {
    background: #cce5ff;
    color: #004085;
}

.badge-info {
    background: #d1ecf1;
    color: #0c5460;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.action-buttons .btn {
    min-width: 60px;
}

/* Footer */
.admin-footer {
    background: white;
    padding: 20px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.admin-footer p {
    color: #666;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .admin-nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .page-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box form {
        flex-wrap: wrap;
    }
    
    .search-box input {
        min-width: auto;
        flex: 1;
    }
    
    .table th,
    .table td {
        padding: 8px 10px;
        font-size: 14px;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .action-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .login-box {
        padding: 20px;
    }
    
    .dashboard-header h1 {
        font-size: 24px;
    }
}