* {
    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;
    padding: 20px;
    color: #333;
}

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

.header {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.header h1 {
    color: #667eea;
    font-size: 28px;
}

.subtitle {
    color: #666;
    margin-top: 5px;
}

.header nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
    text-align: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-secondary {
    background: #48bb78;
    color: white;
}

.btn-secondary:hover {
    background: #38a169;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

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

.btn-large {
    padding: 15px 40px;
    font-size: 16px;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.app-card {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.app-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-icon svg {
    width: 50px;
    height: 50px;
    fill: white;
}

.app-name {
    font-size: 22px;
    margin-bottom: 10px;
    color: #2d3748;
}

.app-version {
    color: #718096;
    margin-bottom: 10px;
    font-size: 14px;
}

.app-description {
    color: #4a5568;
    margin-bottom: 20px;
    line-height: 1.6;
}

.qr-code {
    margin: 20px auto;
    padding: 10px;
    background: white;
    display: inline-block;
}

.btn-download {
    margin-top: 15px;
    width: 100%;
}

.app-table {
    width: 100%;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border-collapse: collapse;
}

.app-table th,
.app-table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.app-table th {
    background: #f7fafc;
    font-weight: 600;
    color: #4a5568;
}

.app-table tr:last-child td {
    border-bottom: none;
}

.app-table tr:hover {
    background: #f7fafc;
}

.status-badge {
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.status-1 {
    background: #c6f6d5;
    color: #22543d;
}

.status-0 {
    background: #fed7d7;
    color: #742a2a;
}

.login-container {
    max-width: 400px;
    margin: 100px auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.login-container h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #667eea;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #4a5568;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.help-text {
    color: #718096;
    font-size: 12px;
    margin-top: 5px;
}

.upload-form {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.error {
    background: #fed7d7;
    color: #742a2a;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

.success {
    background: #c6f6d5;
    color: #22543d;
    padding: 12px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}

.empty-message,
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: white;
    border-radius: 10px;
    color: #718096;
    font-size: 18px;
}

.footer {
    text-align: center;
    padding: 20px;
    color: white;
}

.admin-link {
    color: white;
    text-decoration: underline;
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }

    .header nav {
        margin-top: 20px;
        justify-content: center;
    }

    .app-grid {
        grid-template-columns: 1fr;
    }

    .app-table {
        font-size: 12px;
    }

    .app-table th,
    .app-table td {
        padding: 8px;
    }
}