@layer theme,base,components,utilities;:root{color-scheme:light;--paper:#fff;--ink:#111827;--muted:#5b6472;--soft:#f7f8fa;--line:#d9dee7;--accent:#2f5f9f;--accent-soft:#edf4ff;--code-bg:#111827;--code-ink:#eef2ff;--max-reader:760px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Apple SD Gothic Neo,Noto Sans KR,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:linear-gradient(90deg,#2f5f9f0d,transparent 26rem),var(--paper);color:var(--ink);letter-spacing:0;margin:0}a{color:inherit}.site-shell{min-height:100vh}.topbar{z-index:20;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#ffffffeb;border-bottom:1px solid #d9dee7db;justify-content:space-between;align-items:center;gap:1rem;min-height:72px;padding:0 32px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:12px;text-decoration:none;display:inline-flex}.brand-mark{border:1px solid var(--line);width:34px;height:34px;color:var(--accent);place-items:center;font-family:Georgia,Times New Roman,serif;font-size:18px;font-weight:700;display:grid}.brand strong{font-size:15px;line-height:1.25;display:block}.brand small{color:var(--muted);text-transform:uppercase;margin-top:2px;font-size:11px;line-height:1.2;display:block}.top-links{align-items:center;gap:4px;display:flex}.top-links a{color:var(--muted);padding:8px 10px;font-size:13px;font-weight:600;text-decoration:none}.top-links a:hover{color:var(--ink)}.book-grid{grid-template-columns:284px minmax(0,1fr) 220px;gap:40px;width:min(1500px,100%);margin:0 auto;padding:48px 32px 88px;display:grid}.chapter-rail,.section-rail{min-width:0}.rail-inner{position:sticky;top:104px}.nav-section+.nav-section{margin-top:28px}.nav-section h2,.section-rail p{color:#7c8797;text-transform:uppercase;margin:0 0 10px;font-size:11px;font-weight:700;line-height:1.2}.nav-section ol,.section-rail ol{gap:4px;margin:0;padding:0;list-style:none;display:grid}.chapter-link{min-height:38px;color:var(--muted);border-left:2px solid #0000;grid-template-columns:42px 1fr;align-items:center;padding:4px 6px;text-decoration:none;display:grid}.chapter-link span{color:#8b95a5;font-size:11px;font-weight:700}.chapter-link strong{font-size:14px;font-weight:600;line-height:1.25}.chapter-link:hover,.chapter-link.active{color:var(--ink);background:var(--accent-soft);border-left-color:var(--accent)}.reader{min-width:0;max-width:var(--max-reader)}.article-header{border-bottom:1px solid var(--line);padding-bottom:30px}.section-label{color:var(--accent);margin:0 0 18px;font-size:13px;font-weight:700;line-height:1.2}.article-header h1{letter-spacing:0;margin:0;font-family:Georgia,Times New Roman,Noto Serif KR,serif;font-size:clamp(38px,5vw,64px);font-weight:700;line-height:1.02}.article-header>p:last-child{max-width:630px;color:var(--muted);margin:18px 0 0;font-size:17px;line-height:1.75}.book-prose{padding-top:34px;font-size:17px;line-height:1.9}.book-prose>:first-child{margin-top:0}.book-prose>h1:first-child{display:none}.book-prose h1,.book-prose h2,.book-prose h3{color:var(--ink);letter-spacing:0}.book-prose h1{margin:0 0 24px;font-family:Georgia,Times New Roman,Noto Serif KR,serif;font-size:34px;line-height:1.2}.book-prose h2{margin:56px 0 16px;font-size:24px;line-height:1.35}.book-prose h3{margin:34px 0 10px;font-size:19px;line-height:1.4}.book-prose p{margin:18px 0}.book-prose ul,.book-prose ol{margin:18px 0;padding-left:1.25rem}.book-prose li+li{margin-top:6px}.book-prose a{color:var(--accent);text-underline-offset:4px;text-decoration-thickness:1px}.book-prose table{border-collapse:collapse;width:100%;margin:28px 0;font-size:14px;line-height:1.55;display:block;overflow-x:auto}.book-prose th,.book-prose td{border:1px solid var(--line);text-align:left;vertical-align:top;padding:12px 14px}.book-prose th{background:var(--soft);font-weight:700}.book-prose code{background:var(--soft);color:#24324a;border:1px solid #e5e7eb;padding:.12em .3em;font-size:.92em}.book-prose pre{background:var(--code-bg);color:var(--code-ink);border:1px solid #1f2937;margin:28px 0;padding:22px;line-height:1.65;overflow-x:auto}.book-prose pre code{color:inherit;background:0 0;border:0;padding:0;font-size:14px}.stack-note{border:1px solid var(--line);background:var(--soft);color:#263345;margin:28px 0;padding:16px 18px;font-size:14px;line-height:1.6}.section-rail{color:var(--muted);font-size:13px}.section-rail a{color:var(--muted);border-bottom:1px solid #0000;padding:7px 0;line-height:1.35;text-decoration:none;display:block}.section-rail a:hover{color:var(--ink);border-bottom-color:var(--line)}.section-rail span{color:#8b95a5}.page-turn{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:16px;margin-top:64px;padding-top:28px;display:grid}.turn-card{min-height:92px;color:var(--ink);border:1px solid var(--line);background:#fff;padding:18px;text-decoration:none;display:block}.turn-card.next{text-align:right}.turn-card span{color:var(--muted);margin-bottom:10px;font-size:12px;font-weight:700;display:block}.turn-card strong{font-size:16px;line-height:1.35}.turn-card:hover{border-color:var(--accent);background:var(--accent-soft)}@media(max-width:1120px){.book-grid{grid-template-columns:230px minmax(0,1fr)}.section-rail{display:none}}@media(max-width:820px){.topbar{flex-direction:column;align-items:flex-start;padding:18px 20px;position:static}.top-links{flex-wrap:wrap}.book-grid{padding:28px 20px 64px;display:block}.chapter-rail{margin-bottom:36px}.rail-inner{position:static}.nav-section+.nav-section{margin-top:18px}.chapter-link{grid-template-columns:36px 1fr}.article-header h1{font-size:38px}.book-prose{font-size:16px;line-height:1.85}.page-turn{grid-template-columns:1fr}.turn-card.next{text-align:left}}