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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

header {
    padding: 60px 0;
    text-align: center;
    color: white;
}

header h1 {
    font-size: 48px;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header .subtitle {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.search-box {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.search-box input {
    flex: 1;
    padding: 15px 25px;
    border: none;
    outline: none;
    font-size: 16px;
}

.search-box button {
    padding: 15px 25px;
    background: #5a6fd6;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 18px;
    transition: background 0.3s;
}

.search-box button:hover {
    background: #4a5fc6;
}

.category-nav {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    margin-bottom: 30px;
}

.category-nav .container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.category-btn {
    padding: 10px 25px;
    border: none;
    border-radius: 30px;
    background: rgba(255,255,255,0.2);
    color: white;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

.category-btn:hover,
.category-btn.active {
    background: white;
    color: #667eea;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding-bottom: 50px;
}

.app-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.app-icon {
    width: 60px;
    height: 60px;
    margin: 20px auto 15px;
    border-radius: 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.app-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 10px;
}

.app-info {
    padding: 0 20px;
    text-align: center;
}

.app-info h3 {
    font-size: 18px;
    margin-bottom: 5px;
}

.app-info p {
    font-size: 14px;
    color: #666;
    line-height: 1.4;
    margin-bottom: 10px;
}

.update-time {
    font-size: 12px;
    color: #999;
}

.get-btn {
    width: calc(100% - 40px);
    margin: 15px 20px 20px;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #4caf50 0%, #45a049 100%);
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.get-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76,175,80,0.4);
}

footer {
    background: rgba(0,0,0,0.2);
    padding: 30px 0;
    text-align: center;
    color: white;
}

footer p {
    margin-bottom: 5px;
}

footer a {
    color: white;
    text-decoration: underline;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal.show {
    display: flex;
}

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

.modal-content {
    background: white;
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideUp 0.3s ease;
}

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

.modal-header {
    display: flex;
    align-items: center;
    padding: 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
}

.modal-icon {
    width: 60px;
    height: 60px;
    border-radius: 15px;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    flex-shrink: 0;
}

.modal-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 10px;
}

.modal-title h2 {
    font-size: 24px;
    margin-bottom: 5px;
}

.modal-title span {
    font-size: 14px;
    opacity: 0.8;
}

.close-btn {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background 0.3s;
}

.close-btn:hover {
    background: rgba(255,255,255,0.2);
}

.modal-body {
    padding: 25px;
}

.modal-body p {
    font-size: 16px;
    color: #666;
    line-height: 1.6;
}

.modal-footer {
    display: flex;
    gap: 15px;
    padding: 20px 25px;
    border-top: 1px solid #eee;
}

.modal-footer .btn {
    flex: 1;
    justify-content: center;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

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

.login-box {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #333;
    font-size: 24px;
}

.login-box .error {
    background: #ffebee;
    color: #c62828;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #666;
    font-size: 14px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102,126,234,0.4);
}

.btn-success {
    background: linear-gradient(135deg, #4caf50 0%, #45a049 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76,175,80,0.4);
}

.btn-secondary {
    background: #f5f5f5;
    color: #666;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

.btn-danger {
    background: linear-gradient(135deg, #f44336 0%, #da190b 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(244,67,54,0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #ff9800 0%, #f57c00 100%);
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255,152,0,0.4);
}

.btn-sm {
    padding: 6px 15px;
    font-size: 14px;
}

.login-hint {
    text-align: center;
    margin-top: 20px;
    color: #999;
    font-size: 14px;
}

.admin-page {
    background: #f5f7fa;
    min-height: 100vh;
}

.admin-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}

.admin-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h1 {
    font-size: 20px;
    color: #333;
}

.admin-nav {
    display: flex;
    gap: 20px;
}

.admin-nav a {
    text-decoration: none;
    color: #666;
    padding: 10px 15px;
    border-radius: 8px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

.admin-nav a:hover,
.admin-nav a.active {
    background: #667eea;
    color: white;
}

.admin-content {
    padding: 30px 0;
}

.dashboard h2 {
    margin-bottom: 30px;
    color: #333;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 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);
    display: flex;
    align-items: center;
    gap: 20px;
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.stat-value {
    font-size: 32px;
    font-weight: bold;
    color: #333;
}

.stat-label {
    color: #999;
    font-size: 14px;
}

.quick-actions {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.quick-actions h3 {
    margin-bottom: 20px;
    color: #333;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.apps-list {
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    overflow: hidden;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid #eee;
}

.list-header h2 {
    margin: 0;
    color: #333;
}

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

.data-table th,
.data-table td {
    padding: 15px 25px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.data-table th {
    background: #f8f9fa;
    color: #666;
    font-weight: 600;
}

.data-table tr:hover {
    background: #f8f9fa;
}

.form-container {
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 30px;
}

.form-container h2 {
    margin-bottom: 30px;
    color: #333;
}

.form-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.message {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.message.success {
    background: #e8f5e9;
    color: #2e7d32;
}

.message.error {
    background: #ffebee;
    color: #c62828;
}

.error-message {
    color: #dc2626;
    font-size: 14px;
    margin-bottom: 15px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 32px;
    }
    
    .search-box {
        flex-direction: column;
        border-radius: 10px;
    }
    
    .search-box button {
        border-radius: 0 0 10px 10px;
    }
    
    .app-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 15px;
    }
    
    .data-table {
        overflow-x: auto;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .admin-header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .modal-header {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-icon {
        margin-right: 0;
        margin-bottom: 15px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
}