:root { color-scheme: dark; --bg: #0b0b0d; --fg: #f5f5f7; --muted: #a1a1a6; --line: #29292d; --accent: #8db8ff; }
* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", sans-serif; line-height: 1.75; }
a { color: var(--accent); text-underline-offset: .2em; }
a:hover { color: #bed7ff; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
.site-header { max-width: 1080px; margin: auto; padding: 25px 28px; display: flex; justify-content: space-between; align-items: center; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 21px; color: var(--fg); text-decoration: none; }
.site-header nav { display: flex; gap: 22px; font-size: 14px; }
main { max-width: 820px; padding: 64px 28px 56px; margin: auto; }
h1 { font-size: clamp(32px, 5vw, 54px); line-height: 1.15; letter-spacing: -.025em; margin: 10px 0 24px; }
h2 { font-size: clamp(24px, 3vw, 30px); line-height: 1.35; margin: 48px 0 16px; letter-spacing: -.015em; }
p, li { font-size: 18px; }
p { margin: 20px 0; }
li { padding-left: 5px; margin: 12px 0; }
ol { padding-left: 26px; }
.eyebrow { color: var(--accent); font-size: 12px; font-weight: 650; letter-spacing: .16em; margin: 0; }
.byline { color: var(--muted); font-size: 14px; margin: 16px 0 32px; }
.toc { background: #151517; border: 1px solid var(--line); border-radius: 16px; padding: 22px 26px; margin: 28px 0 34px; }
.toc span { color: var(--muted); font-size: 13px; }
.toc ul { padding-left: 20px; margin: 10px 0 0; }
.toc li { font-size: 15px; margin: 5px 0; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; padding: 28px 0 0; margin-top: 24px; border-top: 1px solid var(--line); font-size: 15px; }
.button { background: #2563eb; color: #fff; text-decoration: none; padding: 12px 22px; border-radius: 12px; font-size: 16px; font-weight: 600; }
.button:hover { background: #1d4ed8; color: #fff; }
.related { margin: 36px 0 24px; font-size: 16px; }
.arrangement-figure { margin: 32px 0; }
.arrangements { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); gap: 16px; }
.arrangement-card { border: 1px solid var(--line); border-radius: 16px; padding: 18px; background: #151517; }
.arrangement-card p { margin: 0 0 18px; font-size: 16px; font-weight: 600; }
.arrangement-card small { display: block; margin-top: 18px; color: var(--muted); line-height: 1.5; }
.stack-diagram { display: flex; flex-direction: column; align-items: center; }
.screen { border: 2px solid #677180; background: #202631; color: var(--fg); min-height: 64px; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.stack-diagram .screen { width: 148px; }
.row-diagram { display: flex; align-items: center; height: 128px; }
.row-diagram .screen { flex: 1; min-width: 0; }
.screen.shared-bottom { border-bottom: 4px dashed #ffb36b; }
.screen.shared-sides { border-left: 4px dashed #ffb36b; border-right: 4px dashed #ffb36b; }
.screen.available-bottom { border-bottom: 4px solid #75d5af; }
figcaption { color: var(--muted); font-size: 13px; line-height: 1.6; margin-top: 14px; }
footer { display: flex; flex-wrap: wrap; gap: 20px; max-width: 820px; padding: 24px 28px 36px; margin: auto; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); }
.skip { position: absolute; top: -100px; left: 20px; background: var(--bg); padding: 12px; }
.skip:focus { top: 8px; }
@media (max-width: 560px) { .site-header { padding: 20px; gap: 12px; } .site-header nav { gap: 12px; font-size: 12px; } main { padding: 40px 22px; } p, li { font-size: 17px; } footer { padding: 24px 22px; } }

.setup-figure { margin: 28px 0; }
.setup-figure img { display: block; width: 100%; height: auto; border: 1px solid var(--line); border-radius: 16px; }