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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #f8f9fa;
    color: #333;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

.sidebar {
    width: 240px;
    background: #ffffff;
    border-right: 1px solid #e5e7eb;
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.sidebar-header {
    padding: 1.75rem 1rem;
    border-bottom: 1px solid #e5e7eb;
    min-height: 90px;
    display: flex;
    align-items: center;
}

.sidebar-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #1f2937;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-brand img {
    height: 55px;
    width: auto;
    object-fit: contain;
}

.sidebar-brand span {
    font-size: 1.125rem;
    font-weight: 700;
}

.sidebar-menu {
    flex: 1;
    padding: 1rem 0;
}

.sidebar-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 1.5rem;
    color: #6b7280;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border-left: 3px solid transparent;
}

.sidebar-item:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.sidebar-item.active {
    background: #eef2ff;
    color: #4f46e5;
    border-left-color: #4f46e5;
}

.sidebar-item-icon {
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid #e5e7eb;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #4f46e5;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.user-details {
    flex: 1;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: #1f2937;
}

.user-email {
    font-size: 0.75rem;
    color: #6b7280;
}

.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.top-header {
    background: white;
    border-bottom: 1px solid #e5e7eb;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1f2937;
}

.header-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.tabs {
    display: flex;
    gap: 2rem;
    border-bottom: 2px solid #e5e7eb;
    margin-bottom: 2rem;
}

.tab {
    padding: 0.75rem 0;
    color: #6b7280;
    text-decoration: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

.tab:hover {
    color: #1f2937;
}

.tab.active {
    color: #4f46e5;
    border-bottom-color: #4f46e5;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.empty-state h3 {
    font-size: 1.25rem;
    color: #1f2937;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: #6b7280;
    font-size: 0.95rem;
}

.auth-container {
    max-width: 400px;
    margin: 3rem auto;
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.auth-container h2 {
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: #4f46e5;
    color: white;
}

.btn-primary:hover {
    background: #4338ca;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.2);
}

.auth-container .btn-primary {
    width: 100%;
}

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

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

.btn-danger {
    background: #e74c3c;
    color: white;
}

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

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #229954;
}

.auth-switch {
    text-align: center;
    margin-top: 1rem;
}

.auth-switch a {
    color: #3498db;
    text-decoration: none;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2rem;
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.event-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.2s;
}

.event-card:hover {
    border-color: #4f46e5;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.1);
}

.event-card h3 {
    margin-bottom: 0.75rem;
    color: #1f2937;
    font-size: 1.125rem;
}

.event-card p {
    margin-bottom: 0.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.5;
}

.event-meta {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    font-size: 0.8rem;
    color: #6b7280;
    flex-wrap: wrap;
}

.event-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.event-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
}

.event-actions button {
    flex: 1;
    padding: 0.5rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
}

.modal.active {
    display: block;
}

.modal-content {
    background: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: 8px;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.close {
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: #999;
}

.close:hover {
    color: #333;
}

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
}

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

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

.badge-danger {
    background: #f8d7da;
    color: #721c24;
}


/* Advertisement Section */
.advertisement-section {
    margin-bottom: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
    position: relative;
}

.ad-carousel {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.ad-container {
    display: flex;
    transition: transform 0.5s ease-in-out;
    height: 100%;
}

.ad-slide {
    min-width: 100%;
    height: 100%;
    position: relative;
    cursor: pointer;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
}

.ad-content {
    width: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 2rem;
    color: white;
}

.ad-badge {
    display: inline-block;
    background: #ef4444;
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.ad-badge.featured {
    background: #f59e0b;
}

.ad-badge.external {
    background: #3b82f6;
}

.ad-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.ad-description {
    font-size: 0.95rem;
    opacity: 0.95;
    margin-bottom: 0.75rem;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.ad-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    opacity: 0.9;
}

.ad-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.ad-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.9);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: #1f2937;
}

.ad-nav:hover {
    background: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.ad-nav-prev {
    left: 1rem;
}

.ad-nav-next {
    right: 1rem;
}

.ad-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: #f9fafb;
}

.ad-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #d1d5db;
    cursor: pointer;
    transition: all 0.3s;
}

.ad-indicator.active {
    background: #4f46e5;
    width: 24px;
    border-radius: 4px;
}

.ad-indicator:hover {
    background: #9ca3af;
}

/* Admin Ad Management */
.ad-management {
    background: white;
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.ad-list {
    display: grid;
    gap: 1rem;
    margin-top: 1.5rem;
}

.ad-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    align-items: center;
}

.ad-item-image {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 6px;
    flex-shrink: 0;
}

.ad-item-content {
    flex: 1;
}

.ad-item-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.ad-item-meta {
    font-size: 0.875rem;
    color: #6b7280;
}

.ad-item-actions {
    display: flex;
    gap: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .ad-carousel {
        height: 200px;
    }
    
    .ad-title {
        font-size: 1.25rem;
    }
    
    .ad-nav {
        width: 32px;
        height: 32px;
        font-size: 1.25rem;
    }
}


/* Auth Logo Styling */
.auth-logo {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid #e5e7eb;
}

.auth-logo img {
    height: 60px;
    width: auto;
    margin-bottom: 1rem;
    object-fit: contain;
}

.auth-logo h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1f2937;
    margin: 0;
}

.auth-container h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1.5rem;
    text-align: center;
}