:root { --bg: #ffffff; --fg: #1f2937; --muted: #6b7280; --border: #e5e7eb; --accent: #d97706; --bg-soft: #fafafa; --accent-2: #2563eb; }
* { box-sizing: border-box; }
body { font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif; background: var(--bg); color: var(--fg); max-width: 960px; margin: 0 auto; padding: 32px 24px; line-height: 1.7; }
h1 { font-size: 30px; border-bottom: 3px solid var(--accent); padding-bottom: 12px; margin-bottom: 8px; }
h2 { font-size: 22px; color: var(--accent); margin-top: 0; }
h3 { font-size: 17px; color: var(--fg); margin-top: 24px; }
h4 { font-size: 14px; color: var(--muted); margin: 0 0 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.subtitle { color: var(--muted); margin-bottom: 24px; font-size: 14px; }
.version { display: inline-block; padding: 2px 10px; background: var(--accent); color: white; border-radius: 12px; font-size: 12px; font-weight: 500; margin-left: 8px; vertical-align: middle; }
.intro { background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%); border: 1px solid #fde68a; border-radius: 12px; padding: 20px 24px; margin-bottom: 32px; }
.intro h2 { margin-top: 0; color: #92400e; }
.intro p { margin: 8px 0; }
.toc { background: #fffbeb; border: 1px solid #fde68a; border-radius: 8px; padding: 16px 24px; margin-bottom: 32px; }
.toc strong { display: block; margin-bottom: 8px; color: var(--accent); }
.toc ol { margin: 0; padding-left: 20px; column-count: 2; column-gap: 32px; }
.toc li { margin: 4px 0; break-inside: avoid; }
.toc a { color: var(--fg); text-decoration: none; }
.toc a:hover { color: var(--accent); }
section { margin-bottom: 48px; padding: 24px; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-soft); scroll-margin-top: 20px; }
section .description { margin: 12px 0; color: var(--fg); font-size: 15px; }
.concept { background: #f0f9ff; border-left: 4px solid #0ea5e9; padding: 12px 16px; margin: 16px 0; border-radius: 0 6px 6px 0; font-size: 14px; }
.concept strong { color: #0369a1; }
.why { background: #fffbeb; border-left: 4px solid var(--accent); padding: 12px 16px; margin: 16px 0; font-size: 14px; border-radius: 0 6px 6px 0; }
.why strong { color: var(--accent); }
.components { background: #f9fafb; border: 1px solid #e5e7eb; padding: 14px 18px; margin: 16px 0; border-radius: 6px; font-size: 14px; }
.components ul { margin: 0; padding-left: 18px; }
.components li { margin: 6px 0; }
.components strong { color: #1f2937; }
.components code { background: #f3f4f6; padding: 1px 6px; border-radius: 3px; font-size: 13px; }
.example { background: #ecfdf5; border-left: 4px solid #10b981; padding: 12px 16px; margin: 16px 0; border-radius: 0 6px 6px 0; font-size: 14px; }
.example strong { color: #047857; }
.pitfalls { background: #fef2f2; border-left: 4px solid #ef4444; padding: 12px 16px; margin: 16px 0; border-radius: 0 6px 6px 0; font-size: 14px; }
.pitfalls strong { color: #b91c1c; }
.pitfalls ul { margin: 8px 0 0; padding-left: 20px; }
.pitfalls li { margin: 4px 0; }
.frameworks { background: #faf5ff; border-left: 4px solid #a855f7; padding: 12px 16px; margin: 16px 0; border-radius: 0 6px 6px 0; font-size: 14px; }
.frameworks strong { color: #7e22ce; }
.mermaid { background: white; padding: 20px; border-radius: 8px; text-align: center; overflow-x: auto; margin: 16px 0; border: 1px solid #f3f4f6; }
.state-diagram-wide { max-width: 100%; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 12px; font-weight: 500; }
.badge-core { background: #fef3c7; color: #92400e; }
.badge-extra { background: #dbeafe; color: #1e40af; }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--muted); font-size: 13px; text-align: center; }
.outro { background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%); border: 1px solid #bae6fd; border-radius: 12px; padding: 20px 24px; margin-top: 32px; }
.outro h2 { margin-top: 0; color: #0369a1; }
.page-nav { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; padding: 12px 16px; background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.page-nav a { color: var(--accent); text-decoration: none; padding: 4px 10px; border-radius: 4px; }
.page-nav a:hover { background: #fef3c7; }
.page-nav .toc-link { font-weight: 600; }
.section-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; font-size: 13px; color: var(--muted); }
.section-meta .num { background: var(--accent); color: white; padding: 2px 10px; border-radius: 12px; font-weight: 500; }
pre { background: #f3f4f6; padding: 12px; border-radius: 6px; font-size: 13px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 8px 0; }
th, td { padding: 6px 10px; border: 1px solid #e5e7eb; text-align: left; }
th { background: #fef3c7; }