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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #f0f2f5;
    min-height: 100vh;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 24px 30px;
    border-radius: 12px;
    margin-bottom: 24px;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.header h1 {
    font-size: 24px;
    margin-bottom: 6px;
}

.header p {
    opacity: 0.85;
    font-size: 14px;
}

.tab-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.tab-btn {
    padding: 10px 24px;
    border: none;
    background: white;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 500;
    color: #555;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    transition: all 0.2s;
}

.tab-btn:hover {
    background: #e8ecf3;
}

.tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
}

.panel {
    background: white;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    display: none;
}

.panel.active {
    display: block;
}

.panel h2 {
    font-size: 18px;
    color: #333;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f2f5;
}

.form-row {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group label {
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

input, select, textarea {
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
    transform: translateY(-1px);
}

.btn-danger {
    background: #ff4757;
    color: white;
}

.btn-danger:hover {
    background: #e03040;
}

.btn-success {
    background: #2ed573;
    color: white;
}

.btn-success:hover {
    background: #20b860;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

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

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #f0f2f5;
}

th {
    background: #f8f9fa;
    font-weight: 600;
    color: #555;
    font-size: 13px;
    text-transform: uppercase;
}

tr:hover {
    background: #f8f9fb;
}

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

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

.badge-danger {
    background: #ffebee;
    color: #c62828;
}

.actions {
    display: flex;
    gap: 6px;
}

.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 14px 24px;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    z-index: 9999;
    animation: slideIn 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.toast-success { background: #2ed573; }
.toast-error { background: #ff4757; }

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.login-box {
    max-width: 400px;
    margin: 80px auto;
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
}

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

.login-box input {
    width: 100%;
    margin-bottom: 14px;
}

.login-box .btn {
    width: 100%;
    padding: 12px;
    font-size: 16px;
}

.hidden { display: none; }

.usage-box {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 16px;
    margin-top: 16px;
    font-size: 13px;
}

.usage-box code {
    background: #e8ecf3;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 13px;
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 20px;
}

.stat-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.stat-card .label {
    font-size: 13px;
    color: #888;
    margin-bottom: 6px;
}

.stat-card .value {
    font-size: 28px;
    font-weight: 700;
    color: #333;
}

@media (max-width: 768px) {
    .container { padding: 12px; }
    .form-row { flex-direction: column; }
    .tab-bar { flex-wrap: wrap; }
    table { font-size: 13px; }
    th, td { padding: 8px; }
}