/* 생성물 — scripts/build-docs.mjs 의 STYLE_CSS 를 편집하세요. */
:root {
  --bg: #fbfbfa; --bg-soft: #f4f4f2; --surface: #ffffff;
  --fg: #1c1b1a; --fg-soft: #44403c; --muted: #6b635b;
  --border: #e7e5e4; --border-soft: #f0efed;
  --accent: #047857; --accent-strong: #065f46; --accent-contrast: #ffffff;
  --accent-soft-bg: #ecfdf5; --accent-soft-border: #a7f3d0;
  --code-bg: #f1f0ed; --code-fg: #1c1b1a;
  --term-bg: #1a1917; --term-fg: #e7e5e4; --term-bar: #2a2826; --term-border: #322f2c;
  --shadow-sm: 0 1px 2px rgba(28,27,26,.05);
  --shadow: 0 1px 2px rgba(28,27,26,.05), 0 12px 28px -16px rgba(28,27,26,.22);
  --maxw: 1180px;
}
:root[data-theme="dark"] {
  --bg: #0c0d0c; --bg-soft: #131413; --surface: #161816;
  --fg: #eae8e4; --fg-soft: #c2bdb5; --muted: #8a857c;
  --border: #292b27; --border-soft: #1d1f1c;
  --accent: #34d399; --accent-strong: #6ee7b7; --accent-contrast: #06231a;
  --accent-soft-bg: #0d1f16; --accent-soft-border: #14532d;
  --code-bg: #181a17; --code-fg: #eae8e4;
  --term-bg: #0a0b0a; --term-fg: #d9d6d0; --term-bar: #161815; --term-border: #24261f;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 16px 40px -20px rgba(0,0,0,.7);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0c0d0c; --bg-soft: #131413; --surface: #161816;
    --fg: #eae8e4; --fg-soft: #c2bdb5; --muted: #8a857c;
    --border: #292b27; --border-soft: #1d1f1c;
    --accent: #34d399; --accent-strong: #6ee7b7; --accent-contrast: #06231a;
    --accent-soft-bg: #0d1f16; --accent-soft-border: #14532d;
    --code-bg: #181a17; --code-fg: #eae8e4;
    --term-bg: #0a0b0a; --term-fg: #d9d6d0; --term-bar: #161815; --term-border: #24261f;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.4);
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 16px 40px -20px rgba(0,0,0,.7);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: "IBM Plex Sans", "IBM Plex Sans KR", -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 16px; line-height: 1.7; letter-spacing: -0.003em;
  -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility;
}
::selection { background: var(--accent); color: var(--accent-contrast); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-strong); }
.skip-link { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-contrast); padding: .6rem 1rem; border-radius: 0 0 8px 0; z-index: 100; }
.skip-link:focus { left: 0; }

/* topbar */
.topbar {
  position: sticky; top: 0; z-index: 50; display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .7rem clamp(1rem, 4vw, 2.5rem);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(1.4) blur(10px); -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: baseline; gap: .55rem; color: var(--fg); }
.brand-mark { font-family: "IBM Plex Mono", monospace; font-weight: 600; font-size: 1.05rem; background: var(--accent); color: var(--accent-contrast); padding: .12em .45em; border-radius: 7px; letter-spacing: -0.02em; }
.brand-sub { color: var(--muted); font-size: .85rem; font-weight: 500; }
.topnav { display: flex; align-items: center; gap: .35rem; }
.langswitch { font-family: "IBM Plex Mono", monospace; font-size: .82rem; margin-right: .3rem; }
.langswitch .lang { color: var(--muted); padding: .2rem .15rem; }
.langswitch .lang.active { color: var(--fg); font-weight: 600; }
.langswitch .lang-sep { color: var(--border); margin: 0 .15rem; }
.icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; border-radius: 8px; color: var(--fg-soft); border: 1px solid transparent; background: transparent; cursor: pointer; font-size: 1rem; transition: background .15s, color .15s, border-color .15s; }
.icon-btn:hover { background: var(--bg-soft); color: var(--fg); border-color: var(--border); }
.i-sun { display: none; } .i-moon { display: inline; }
:root[data-theme="dark"] .i-sun { display: inline; } :root[data-theme="dark"] .i-moon { display: none; }
@media (prefers-color-scheme: dark) { :root:not([data-theme]) .i-sun { display: inline; } :root:not([data-theme]) .i-moon { display: none; } }

/* hero */
.hero { border-bottom: 1px solid var(--border); background: radial-gradient(120% 80% at 50% -10%, color-mix(in srgb, var(--accent) 9%, transparent), transparent 60%); }
.hero-inner { max-width: var(--maxw); margin: 0 auto; padding: clamp(2.5rem, 7vw, 5rem) clamp(1rem, 4vw, 2.5rem) clamp(2rem, 5vw, 3.5rem); }
.hero .inline-lang { display: none; }
.eyebrow { font-family: "IBM Plex Mono", monospace; text-transform: uppercase; letter-spacing: .18em; font-size: .72rem; color: var(--accent); margin: 0 0 1rem; font-weight: 600; animation: rise .6s cubic-bezier(.2,.7,.2,1) both; }
.hero h1 { font-size: clamp(2.1rem, 5.2vw, 3.4rem); line-height: 1.06; letter-spacing: -0.03em; font-weight: 700; margin: 0 0 1rem; max-width: 22ch; text-wrap: balance; animation: rise .6s cubic-bezier(.2,.7,.2,1) .05s both; }
.hero h1 code { font-family: "IBM Plex Mono", monospace; font-size: .62em; font-weight: 600; color: var(--accent); background: none; padding: 0; letter-spacing: -0.01em; vertical-align: .04em; }
.hero-inner > p:not(.inline-lang):not(.eyebrow) { font-size: clamp(1.05rem, 1.8vw, 1.35rem); color: var(--fg-soft); max-width: 60ch; margin: 0 0 1.8rem; line-height: 1.55; animation: rise .6s cubic-bezier(.2,.7,.2,1) .1s both; }
.hero-cta { display: flex; flex-wrap: wrap; gap: .75rem; margin: 1.6rem 0 2.2rem; animation: rise .6s cubic-bezier(.2,.7,.2,1) .15s both; }
.btn { display: inline-flex; align-items: center; gap: .4rem; padding: .62rem 1.15rem; border-radius: 10px; font-weight: 600; font-size: .95rem; border: 1px solid var(--border); color: var(--fg); background: var(--surface); transition: transform .12s, box-shadow .15s, border-color .15s, background .15s; box-shadow: var(--shadow-sm); }
.btn:hover { transform: translateY(-1px); border-color: var(--muted); color: var(--fg); background: var(--bg-soft); }
.btn-primary { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); color: var(--accent-contrast); box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--accent) 60%, transparent); }
.hero pre { position: relative; margin: 0; background: var(--term-bg); color: var(--term-fg); border: 1px solid var(--term-border); border-radius: 14px; padding: 2.7rem 1.25rem 1.25rem; overflow-x: auto; box-shadow: var(--shadow); animation: rise .7s cubic-bezier(.2,.7,.2,1) .2s both; font-size: .82rem; line-height: 1.5; }
.hero pre::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 2.4rem; background: var(--term-bar); border-bottom: 1px solid var(--term-border); border-radius: 14px 14px 0 0; }
.hero pre::after { content: ""; position: absolute; top: .95rem; left: 1.1rem; width: .62rem; height: .62rem; border-radius: 50%; background: #ff5f56; box-shadow: 1rem 0 0 #ffbd2e, 2rem 0 0 #27c93f; }
.hero pre code { background: none; padding: 0; color: inherit; font-size: inherit; }

/* layout */
.layout { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.5rem); display: grid; grid-template-columns: 232px minmax(0,1fr); gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.sidebar { position: sticky; top: 4.2rem; align-self: start; padding: 2.2rem 0; max-height: calc(100vh - 4.2rem); overflow-y: auto; }
.toc-title { font-family: "IBM Plex Mono", monospace; text-transform: uppercase; letter-spacing: .12em; font-size: .68rem; color: var(--muted); margin: 0 0 .9rem; font-weight: 600; }
.toc-collapse > summary { list-style: none; cursor: pointer; display: flex; align-items: center; }
.toc-collapse > summary::-webkit-details-marker { display: none; }
.toc-collapse > summary::after { content: "\25B8"; margin-left: auto; color: var(--muted); transition: transform .15s; }
.toc-collapse[open] > summary::after { transform: rotate(90deg); }
@media (min-width: 921px) {
  /* 데스크톱: details 닫힘 상태여도 TOC 항상 표시 + summary 비-인터랙티브 (캐럿 숨김). */
  .toc-collapse > .toc { display: block !important; }
  .toc-collapse > summary { cursor: default; pointer-events: none; }
  .toc-collapse > summary::after { display: none; }
}
.toc-list, .toc-sub { list-style: none; margin: 0; padding: 0; }
.toc-list > li { margin: 0 0 .1rem; }
.toc a { display: block; color: var(--muted); font-size: .86rem; padding: .28rem .7rem; border-left: 2px solid transparent; line-height: 1.35; transition: color .12s, border-color .12s; }
.toc a:hover { color: var(--fg); }
.toc a.active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }
.toc-sub { margin: .1rem 0 .4rem; }
.toc-sub a { padding-left: 1.4rem; font-size: .82rem; }

/* content */
.content { padding: 2.2rem 0 4rem; min-width: 0; }
.markdown-body h2 { font-size: 1.55rem; letter-spacing: -0.02em; margin: 2.6rem 0 1rem; padding-top: .4rem; scroll-margin-top: 5rem; }
.markdown-body h2:first-child { margin-top: .5rem; }
.markdown-body h3 { font-size: 1.18rem; letter-spacing: -0.015em; margin: 2rem 0 .8rem; scroll-margin-top: 5rem; }
.markdown-body h2 code, .markdown-body h3 code { font-family: "IBM Plex Mono", monospace; font-size: .82em; background: var(--code-bg); padding: .06em .35em; border-radius: 7px; }
.markdown-body p, .markdown-body li { color: var(--fg-soft); }
.markdown-body strong { color: var(--fg); font-weight: 600; }
.markdown-body del { color: var(--muted); }
.markdown-body a { font-weight: 500; text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent) 35%, transparent); text-underline-offset: 2px; }
.markdown-body a:hover { text-decoration-color: var(--accent); }
.markdown-body ul, .markdown-body ol { padding-left: 1.3rem; }
.markdown-body li { margin: .35rem 0; }
.markdown-body li::marker { color: var(--accent); }
.markdown-body hr { border: 0; border-top: 1px solid var(--border); margin: 2.5rem 0; }
.markdown-body img { max-width: 100%; }
.markdown-body code { font-family: "IBM Plex Mono", monospace; font-size: .85em; background: var(--code-bg); color: var(--code-fg); padding: .15em .4em; border-radius: 6px; border: 1px solid var(--border-soft); }
.markdown-body pre { background: var(--term-bg); color: var(--term-fg); border: 1px solid var(--term-border); border-radius: 12px; padding: 1.15rem 1.25rem; overflow-x: auto; box-shadow: var(--shadow-sm); margin: 1.2rem 0; line-height: 1.55; }
.markdown-body pre code { background: none; border: 0; padding: 0; color: inherit; font-size: .84em; }
.markdown-body blockquote { margin: 1.3rem 0; padding: .9rem 1.1rem .9rem 1.2rem; background: var(--accent-soft-bg); border: 1px solid var(--accent-soft-border); border-left: 3px solid var(--accent); border-radius: 10px; color: var(--fg-soft); }
.markdown-body blockquote > :first-child { margin-top: 0; } .markdown-body blockquote > :last-child { margin-bottom: 0; }
.markdown-body .table-wrap { overflow-x: auto; margin: 1.3rem 0; border: 1px solid var(--border); border-radius: 12px; box-shadow: var(--shadow-sm); }
.markdown-body table { border-collapse: collapse; width: 100%; font-size: .92rem; }
.markdown-body thead th { background: var(--bg-soft); color: var(--fg); font-weight: 600; text-align: left; }
.markdown-body th, .markdown-body td { padding: .6rem .9rem; border-bottom: 1px solid var(--border); border-right: 1px solid var(--border-soft); vertical-align: top; }
.markdown-body th:last-child, .markdown-body td:last-child { border-right: 0; }
.markdown-body tbody tr:last-child td { border-bottom: 0; }
.markdown-body tbody tr:hover { background: var(--bg-soft); }

/* footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 2rem; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 2rem clamp(1rem, 4vw, 2.5rem); display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; justify-content: space-between; color: var(--muted); font-size: .85rem; }
.footer-inner code { font-family: "IBM Plex Mono", monospace; font-size: .82em; }

.sidebar::-webkit-scrollbar, .markdown-body pre::-webkit-scrollbar, .table-wrap::-webkit-scrollbar { height: 8px; width: 8px; }
.sidebar::-webkit-scrollbar-thumb, .markdown-body pre::-webkit-scrollbar-thumb, .table-wrap::-webkit-scrollbar-thumb { background: var(--border); border-radius: 8px; }

@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }

@media (max-width: 920px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; max-height: none; padding: 1.4rem 0 0; border-bottom: 1px solid var(--border); }
  .toc-list { columns: 2; column-gap: 1.5rem; }
  .content { padding-top: 1.6rem; }
}
@media (max-width: 920px) and (min-width: 561px) {
  /* 다중 컬럼 TOC 에선 left-border 가 컬럼 거터와 충돌 → 배경 틴트로 active 표시. */
  .toc a.active { border-left-color: transparent; background: var(--accent-soft-bg); border-radius: 6px; }
}
@media (max-width: 560px) {
  body { font-size: 15px; }
  .brand-sub { display: none; }
  .toc-list { columns: 1; }
  .markdown-body pre { background-image: linear-gradient(to right, transparent calc(100% - 1.5rem), var(--term-bg)); background-attachment: local; }
}