/* Shared styles for ALSChat's informational pages (about, resources, privacy). */
:root {
    --color-bg: #eef1f8;
    --color-surface: #ffffff;
    --color-text: #14171f;
    --color-text-muted: #5b6472;
    --color-border: #dbe0ee;
    --color-primary: #2547d0;
    --color-primary-dark: #17318f;
    --color-primary-tint: #e3e9fc;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    margin: 0;
    line-height: 1.6;
}

.site-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.site-nav {
    max-width: 780px;
    margin: 0 auto;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.site-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--color-text);
    text-decoration: none;
}

.site-logo span {
    color: var(--color-primary);
}

.site-links {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
}

.site-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 15px;
    font-weight: 600;
}

.site-links a:hover,
.site-links a.active {
    color: var(--color-primary);
}

main {
    max-width: 780px;
    margin: 0 auto;
    padding: 40px 20px 64px;
}

main h1 {
    font-size: clamp(28px, 4vw, 38px);
    font-weight: 800;
    margin-bottom: 8px;
}

main p.lead {
    color: var(--color-text-muted);
    font-size: 18px;
    margin-top: 0;
    margin-bottom: 36px;
}

main h2 {
    font-size: 24px;
    font-weight: 800;
    margin-top: 44px;
    margin-bottom: 14px;
}

main h3 {
    font-size: 18px;
    font-weight: 700;
    margin-top: 28px;
    margin-bottom: 8px;
}

main p {
    margin: 0 0 16px;
}

main ul, main ol {
    margin: 0 0 16px;
    padding-left: 24px;
}

main li {
    margin-bottom: 8px;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    padding: 24px;
    margin-bottom: 20px;
}

.card h3 {
    margin-top: 0;
}

.cta-box {
    background: var(--color-primary-tint);
    border-radius: 14px;
    padding: 28px;
    text-align: center;
    margin: 40px 0;
}

.cta-box h2 {
    margin-top: 0;
}

.btn {
    display: inline-block;
    background: var(--color-primary);
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    padding: 12px 28px;
    border-radius: 10px;
    margin-top: 8px;
}

.btn:hover {
    background: var(--color-primary-dark);
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin: 24px 0 36px;
}

.toc {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 18px 24px;
    margin-bottom: 32px;
}

.toc p {
    font-weight: 700;
    margin-bottom: 8px;
}

.toc ul {
    margin-bottom: 0;
}

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 28px 20px;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 13px;
}

.site-footer a {
    color: var(--color-text-muted);
}

.note {
    background: #fff8e6;
    border: 1px solid #f0d38a;
    border-radius: 10px;
    padding: 14px 18px;
    font-size: 14px;
    color: #6b4f00;
    margin: 20px 0;
}