:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #3b82f6;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    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%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    padding: 1rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 0;
}

header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 1rem;
}

.github-badge {
    margin-top: 1rem;
}

.github-badge a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: 0.5rem;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.github-badge a:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.card {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.card.warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border-left: 4px solid var(--warning-color);
}

.card.info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-left: 4px solid var(--info-color);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

button {
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.primary-button {
    flex: 1;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: white;
    border-radius: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow);
}

.primary-button:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.primary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.secondary-button {
    flex: 1;
    padding: 1rem 2rem;
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: 0.75rem;
    font-weight: 600;
}

.secondary-button:hover:not(:disabled) {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.secondary-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.small-button {
    padding: 0.5rem 1rem;
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 0.9rem;
}

.small-button:hover {
    background: var(--border-color);
}

.button-icon {
    font-size: 1.2rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
    font-weight: 500;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-secondary);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.status-indicator.scanning .status-dot {
    background: var(--info-color);
}

.status-indicator.success .status-dot {
    background: var(--success-color);
}

.status-indicator.error .status-dot {
    background: var(--error-color);
}

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

.info-item {
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
}

.info-item label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.info-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    word-break: break-all;
    font-family: 'Courier New', monospace;
}

.action-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

#records-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.record-card {
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary-color);
}

.record-type {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.record-content {
    color: var(--text-primary);
    word-break: break-word;
}

.data-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.data-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    font-size: 0.875rem;
    line-height: 1.5;
    max-height: 400px;
}

.write-type-selector {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
}

.write-type-selector label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.write-form {
    margin-bottom: 1.5rem;
}

.write-form label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.write-form input,
.write-form textarea,
.write-form select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.write-form input:focus,
.write-form textarea:focus,
.write-form select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.requirements {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 0.5rem;
}

.requirements h4 {
    margin-bottom: 0.5rem;
}

.requirements ul {
    margin-left: 1.5rem;
}

footer {
    text-align: center;
    color: white;
    margin-top: 3rem;
    padding: 2rem 0;
}

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

.privacy-note {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 640px) {
    header h1 {
        font-size: 2rem;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .write-type-selector {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
}

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