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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

#app {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Navigation */
.nav {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.nav h1 {
    color: #667eea;
    font-size: 24px;
}

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

/* Buttons */
button {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 600;
}

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

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

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

/* Cards */
.card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.card h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 28px;
}

.card p {
    line-height: 1.8;
    margin-bottom: 15px;
    color: #555;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    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;
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

/* Metric Cards */
.metric-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.metric-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
    opacity: 0.9;
}

.metric-card .value {
    font-size: 36px;
    font-weight: bold;
    margin-bottom: 5px;
}

.metric-card .label {
    font-size: 14px;
    opacity: 0.8;
}

.metric-card.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.metric-card.critical {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* Alerts */
.alerts {
    margin: 20px 0;
}

.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    color: #856404;
}

.alert-critical {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
    color: #721c24;
}

.alert-success {
    background: #d4edda;
    border-left: 4px solid #28a745;
    color: #155724;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th {
    background: #f8f9fa;
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #333;
    border-bottom: 2px solid #dee2e6;
}

table td {
    padding: 12px;
    border-bottom: 1px solid #dee2e6;
}

table tr:hover {
    background: #f8f9fa;
}

/* Charts */
.chart-container {
    position: relative;
    height: 300px;
    margin-top: 20px;
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
}

.spinner {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error */
.error {
    background: #f8d7da;
    color: #721c24;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
    border-left: 4px solid #dc3545;
}

/* Success */
.success {
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
    border-left: 4px solid #28a745;
}

/* Feature List */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 30px 0;
}

.feature {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.feature h3 {
    color: #667eea;
    margin-bottom: 10px;
}

.feature p {
    color: #666;
    line-height: 1.6;
}

/* Session Info */
.session-info {
    background: #e7f3ff;
    padding: 15px;
    border-radius: 5px;
    margin: 20px 0;
    border-left: 4px solid #2196f3;
}

.session-info strong {
    color: #1976d2;
}

/* Responsive */
@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .nav {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-buttons {
        width: 100%;
        flex-direction: column;
    }
    
    .nav-buttons button {
        width: 100%;
    }
}