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

:root {
    --bg-primary: #0a0a0a;
    --bg-card: #1a1a1a;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #6b9eff;
    --border: #27272a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 18px;
    letter-spacing: -0.01em;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

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

footer {
    text-align: center;
    margin-top: 2rem;
}

.about {
    text-align: center;
}

.contact-links {
    font-size: 0.75rem;
    margin: 0.5rem 0;
}

.contact-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: opacity 0.2s;
    opacity: 0.8;
    margin: 0 0.75rem;
}

.contact-links a:hover {
    opacity: 1;
}

.contact-link {
    font-size: 0.75rem;
    margin: 0.25rem 0;
}

.contact-link a {
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.contact-link a:hover {
    opacity: 1;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.motto {
    font-size: 0.75rem;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 1rem;
    line-height: 1.4;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.section p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.list-item {
    font-size: 0.8125rem;
    margin-bottom: 0.25rem;
    padding-left: 0;
}

.collapsible {
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.8125rem;
    margin-right: 0.5rem;
    font-family: inherit;
    transition: all 0.2s;
}

.collapsible:hover {
    color: var(--accent);
    border-color: var(--text-muted);
}

.collapsible-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.collapsible-content.active {
    max-height: 500px;
    transition: max-height 0.3s ease-in;
}

.prompt-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 0.75rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.code-block {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 0.5rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
    overflow-x: auto;
    white-space: pre;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}