.art-head { position: sticky; top: 0; z-index: 50; background: rgb(7 9 12 / .82); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line-dark); }
.art-nav { display: flex; justify-content: space-between; align-items: center; height: 72px; }
.art-nav .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: #fff; }
.art-nav .brand-mark { width: 30px; height: 30px; color: #fff; }
.art-hero { padding: clamp(72px, 10vw, 128px) 0 clamp(24px, 3vw, 40px); max-width: 860px; }
.art-hero h1 { font-size: clamp(44px, 7vw, 104px); line-height: .96; letter-spacing: -.045em; font-weight: 500; font-stretch: 106%; }
.art-dek { margin-top: 28px; max-width: 42rem; font-size: clamp(18px, 1rem + .5vw, 22px); color: var(--muted-dark); }
.art-body { max-width: 860px; padding-bottom: var(--section-y); }
.art-body h2 { font-size: clamp(26px, 2.4vw, 34px); line-height: 1.1; letter-spacing: -.03em; font-weight: 600; margin: 56px 0 16px; }
.art-body p, .art-body li { color: rgb(var(--fg) / .82); font-size: 18px; line-height: 1.7; }
.art-body p + p { margin-top: 16px; }
.art-body ul, .art-body ol { padding-left: 1.2em; display: grid; gap: 12px; margin: 16px 0 0; }
.art-body li b { color: #fff; }
.art-body a { color: var(--electric-soft); text-underline-offset: 3px; }
.art-body a.btn { color: inherit; text-decoration: none; }
.art-body a.btn-primary { color: #fff; }
.art-body > * { max-width: 760px; }
.art-body blockquote { margin: 32px 0; padding: 4px 0 4px 24px; border-left: 3px solid var(--electric); font-size: clamp(22px, 2vw, 28px); line-height: 1.3; letter-spacing: -.02em; color: #fff; font-weight: 500; }
.art-note { margin-top: 56px; padding: clamp(24px, 3vw, 40px); border-radius: var(--radius-card); background: var(--paper); color: var(--night); }
.art-note h2 { margin-top: 0; }
.art-note p { color: var(--muted-light); }
.art-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.art-note .btn-ghost { color: var(--night); }
.refs-h { font-size: 20px !important; }
.refs li { font-size: 14.5px !important; line-height: 1.55 !important; color: var(--muted-dark) !important; }
@media (max-width: 640px) { .art-actions .btn { width: 100%; justify-content: space-between; } .art-actions .btn-ghost { justify-content: center; } }