/* Global Styles */
* {
    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;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Navigation */
.nav-menu {
    background: white;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.nav-link {
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    color: #667eea;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: #f0f4ff;
}

.nav-link.active {
    background: #667eea;
    color: white;
}

/* Cards */
.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.card h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.card h3 {
    color: #764ba2;
    margin-bottom: 15px;
    font-size: 1.4rem;
}

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

.card.success {
    border-left: 5px solid #10b981;
    background: #f0fdf4;
}

.card.success h2 {
    color: #10b981;
}

.card.error {
    border-left: 5px solid #ef4444;
    background: #fef2f2;
}

.card.error h3 {
    color: #ef4444;
}

.card.info {
    border-left: 5px solid #3b82f6;
    background: #eff6ff;
}

.card.info h3 {
    color: #3b82f6;
}

/* Features List */
.features ul {
    list-style: none;
    padding-left: 0;
}

.features li {
    padding: 10px 0;
    border-bottom: 1px solid #e5e7eb;
}

.features li:last-child {
    border-bottom: none;
}

/* Ordered Lists */
ol {
    padding-left: 25px;
}

ol li {
    margin-bottom: 10px;
    color: #555;
}

/* Buttons */
.button-group {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 6px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 10px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background: #4b5563;
}

.btn-danger {
    background: #ef4444;
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

/* Info Table */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.info-table tr {
    border-bottom: 1px solid #e5e7eb;
}

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

.info-table td {
    padding: 12px 10px;
    vertical-align: top;
}

.info-table td:first-child {
    width: 180px;
    color: #6b7280;
}

.info-table code {
    background: #f3f4f6;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: #667eea;
}

/* JSON Display */
.json-display {
    background: #1f2937;
    color: #10b981;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* Code */
code {
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: #667eea;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: white;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
    
    .nav-menu {
        flex-direction: column;
    }
    
    .info-table td:first-child {
        width: 120px;
        font-size: 0.9rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-radius: 50%;
    border-top-color: #667eea;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Alerts */
.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid #10b981;
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid #ef4444;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-left: 4px solid #3b82f6;
}