/* /about — long-form readable typography. Anonymity-rule-clean. */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    --primary: #6366F1;
    --primary-hover: #4F46E5;
    --bg-base: #FFFFFF;
    --bg-soft: #F8F9FB;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    --border-subtle: rgba(15, 23, 42, 0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-soft);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; transition: color 0.15s; }
a:hover { color: var(--primary-hover); }

.topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 28px;
    max-width: 1200px;
    margin: 0 auto;
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-subtle);
}
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text-primary); font-weight: 700; font-size: 1.05rem; text-decoration: none; }
.brand-icon { font-size: 1.1rem; }
.topbar-nav { display: flex; gap: 22px; align-items: center; }
.topbar-nav a { color: var(--text-secondary); font-weight: 500; font-size: 0.95rem; text-decoration: none; }
.topbar-nav a:hover { color: var(--text-primary); }
.signin-link {
    background: var(--text-primary);
    color: #fff !important;
    padding: 8px 16px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
}

.about-main {
    max-width: 720px;
    margin: 0 auto;
    padding: 64px 24px 80px;
}
.about-article { background: transparent; }
.eyebrow {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.about-article h1 {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 28px;
    line-height: 1.2;
}
.about-article h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 36px;
    margin-bottom: 12px;
}
.about-article p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 18px;
}
.about-article ul {
    margin: 12px 0 18px 24px;
    color: var(--text-secondary);
    font-size: 1.05rem;
}
.about-article li {
    margin-bottom: 6px;
}

.signoff {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-weight: 600;
}
.signoff-detail {
    color: var(--text-tertiary);
    font-weight: 400;
    font-size: 0.92rem;
}

.page-foot {
    background: var(--bg-base);
    border-top: 1px solid var(--border-subtle);
    margin-top: 48px;
}
.foot-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-tertiary);
    font-size: 0.88rem;
}

@media (max-width: 600px) {
    .topbar { padding: 14px 16px; }
    .topbar-nav { gap: 0; }
    .topbar-nav a:not(.signin-link) { display: none; }
    .about-main { padding: 36px 18px 60px; }
    .about-article h1 { font-size: 1.7rem; }
    .about-article h2 { font-size: 1.2rem; }
    .about-article p, .about-article ul { font-size: 0.98rem; }
    .foot-inner { flex-direction: column; gap: 6px; align-items: flex-start; }
}