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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1e293b;
    --darker-bg: #0f172a;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--light-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Login Page */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 20px;
}

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

.login-box {
    background: white;
    border-radius: 12px;
    padding: 40px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .login-box {
        padding: 30px 20px;
    }
    
    .login-header h1 {
        font-size: 28px;
    }
}

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

.login-header h1 {
    font-size: 32px;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

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

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

.login-form input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s;
}

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

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    width: 100%;
}

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

.btn-primary:hover {
    background: #4f46e5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.error-message {
    margin-top: 15px;
    padding: 12px;
    background: #fee2e2;
    color: var(--danger-color);
    border-radius: 8px;
    font-size: 14px;
}

/* Admin Container */
.admin-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Top Header */
.top-header {
    background: var(--dark-bg);
    color: white;
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background 0.3s;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.header-left h2 {
    font-size: 20px;
    margin: 0;
}

.header-subtitle {
    font-size: 12px;
    color: var(--text-light);
    margin: 0;
    display: block;
}

@media (max-width: 768px) {
    .header-subtitle {
        display: none;
    }
}

.top-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    flex-wrap: wrap;
}

.nav-item {
    display: inline-flex;
    align-items: center;
    padding: 10px 16px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s;
    border-radius: 8px;
    white-space: nowrap;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-item.active {
    background: rgba(99, 102, 241, 0.3);
    color: white;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logout-btn {
    padding: 8px 16px;
}

/* Main Content */
.main-content {
    flex: 1;
    min-height: calc(100vh - 80px);
}

.content-header {
    background: white;
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-header h1 {
    font-size: 28px;
    font-weight: 600;
    margin: 0;
}

.header-actions-top {
    display: flex;
    gap: 12px;
    align-items: center;
}

.user-info {
    color: var(--text-secondary);
    font-size: 14px;
}

.content-body {
    padding: 32px;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
}

/* Tables */
.table-container {
    overflow-x: auto;
}

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

table th,
table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

table th {
    background: var(--light-bg);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background: #dbeafe;
    color: #1e40af;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-small {
    padding: 6px 12px;
    font-size: 14px;
    max-width: 200px;
}

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

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

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

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
}

.tab {
    padding: 12px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

/* Mobile Menu */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1998;
}

.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    max-width: 85vw;
    height: 100vh;
    background: var(--dark-bg);
    color: white;
    z-index: 1999;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    overflow-y: auto;
}

.mobile-menu-overlay.active {
    display: block;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-header h3 {
    margin: 0;
    font-size: 20px;
}

.mobile-menu-close {
    background: transparent;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.3s;
}

.mobile-menu-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-nav {
    padding: 16px 0;
}

.mobile-nav-item {
    display: block;
    padding: 16px 20px;
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.mobile-nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.mobile-nav-item.active {
    background: rgba(99, 102, 241, 0.2);
    color: white;
    border-left-color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .top-header {
        padding: 12px 16px;
        gap: 12px;
    }
    
    .header-left {
        flex: 1;
    }
    
    .top-nav {
        display: none;
    }
    
    .header-right {
        flex-shrink: 0;
    }
    
    .header-right .logout-btn {
        padding: 8px 12px;
        font-size: 14px;
    }

    .content-header {
        padding: 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .content-body {
        padding: 16px;
    }
    
    .content-header h1 {
        font-size: 20px;
    }
    
    .header-actions-top {
        width: 100%;
        justify-content: flex-start;
    }
    
    .header-actions {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    .user-info {
        font-size: 12px;
    }

    .content-body {
        padding: 16px 12px;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-value {
        font-size: 24px;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .form-group {
        margin-bottom: 16px;
    }

    table {
        font-size: 12px;
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }
    
    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    table th,
    table td {
        padding: 8px 6px;
        min-width: 80px;
    }
    
    .card {
        padding: 16px;
        margin-bottom: 16px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .card-title {
        font-size: 18px;
    }
    
    .tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .tab {
        padding: 10px 16px;
        font-size: 13px;
        white-space: nowrap;
    }
    
    .btn {
        padding: 10px 16px;
        font-size: 14px;
    }
    
    .btn-small {
        padding: 6px 10px;
        font-size: 12px;
    }
    
    .modal-content {
        width: 95%;
        max-width: 95%;
        margin: 10px;
    }
    
    .modal-body {
        padding: 16px;
    }
    
    .filters-section {
        padding-bottom: 16px;
    }
    
    .file-upload-area {
        padding: 16px;
    }
    
    .button-item {
        padding: 12px;
    }
    
    select.status-select {
        font-size: 12px;
        padding: 6px 8px;
    }
}

/* Status Select Styling */
.status-select {
    min-width: 200px;
    padding: 8px 32px 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: white;
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236366f1' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 12px;
}

.status-select:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.15);
}

.status-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.status-select option {
    padding: 10px;
    font-weight: 500;
}

/* Status-specific colors for select */
.status-select[value="start"],
.status-select.status-start {
    border-color: #e2e8f0;
    background-color: white;
}

.status-select[value="registered"],
.status-select.status-registered {
    border-color: #cbd5e1;
    background-color: #f8fafc;
}

.status-select[value="registration_confirmed"],
.status-select.status-registration_confirmed {
    border-color: #86efac;
    background-color: #f0fdf4;
    color: #065f46;
}

.status-select[value="on_payment"],
.status-select.status-on_payment {
    border-color: #fde047;
    background-color: #fefce8;
    color: #854d0e;
}

.status-select[value="payment_confirmed"],
.status-select.status-payment_confirmed {
    border-color: #10b981;
    background-color: #ecfdf5;
    color: #065f46;
}

/* Checkbox */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-item input[type="checkbox"] {
    width: auto;
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload:hover {
    border-color: var(--primary-color);
    background: var(--light-bg);
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-area {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.file-upload-area:hover {
    border-color: var(--primary-color);
    background: var(--light-bg);
}

.file-upload-area input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-upload-placeholder {
    pointer-events: none;
}

.file-hint {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.media-preview {
    margin-top: 16px;
    text-align: left;
}

.file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--light-bg);
    border-radius: 6px;
    margin-bottom: 8px;
}

.btn-remove-file {
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 0;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.modal-large {
    max-width: 700px;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}


/* Filters Section */
.filters-section {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.filter-input {
    width: 100%;
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

/* Button Items */
.button-item {
    padding: 16px;
    background: var(--light-bg);
    border-radius: 8px;
    margin-bottom: 12px;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding: 16px;
    background: var(--light-bg);
    border-radius: 8px;
    flex-wrap: wrap;
    gap: 12px;
}

.pagination-info {
    color: var(--text-secondary);
    font-size: 14px;
}

.pagination-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.pagination-page {
    padding: 0 12px;
    color: var(--text-secondary);
    font-size: 14px;
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Action buttons container */
#action-buttons-container {
    display: none;
    flex-wrap: wrap;
    align-items: center;
}

#action-buttons-container.show {
    display: flex;
}