/* 영닥터 아틀라스 — site.css (v2 「측량 도판」)
   지도가 정체성이다: 격자선(graticule) · 밀도 음영(choropleth) · 측량 안 된 칸은 빗금 · 내 자리는 길 표시 황색 하나.
   나머지(노드 글·목록·소개)는 조용한 읽기 판. 웹폰트·외부 자원 없음, 대비는 색으로만(opacity 금지). */

:root {
  --paper: #f3f5f1;
  --sheet: #fbfcfa;
  --ink: #13263a;
  --ink-2: #3d4f61;
  --ink-3: #66768a;
  --rule: #c9d2cc;
  --rule-strong: #8c9b94;
  --grid: #b9c6bf;
  --d1: #dcebe4;
  --d2: #9fcab8;
  --d3: #2f6b5d;
  --d3-ink: #f3f8f5;
  --route: #e0a526;
  --route-ink: #13263a;
  --route-soft: #f7e7bd;
  --link: #1e5a7a;
  --trap: #b3362b;
  --trap-soft: #f6e3df;
  --hatch: #cdd6d0;
  --code-bg: #e8ece6;
  --maxw: 1240px;
  --readw: 42rem;
  --gutter: 16px;
  --label-w: 8.5rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0f1a24; --sheet: #142231;
    --ink: #e7eef0; --ink-2: #b8c6cc; --ink-3: #8a9aa3;
    --rule: #26384a; --rule-strong: #4a6072; --grid: #2c4256;
    --d1: #183a35; --d2: #24604f; --d3: #5fb59a; --d3-ink: #0b1a17;
    --route: #f0b83a; --route-ink: #13263a; --route-soft: #3a3016;
    --link: #8cc3e0; --trap: #f08a7c; --trap-soft: #3b211e;
    --hatch: #23364a; --code-bg: #1b2b3b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0f1a24; --sheet: #142231;
  --ink: #e7eef0; --ink-2: #b8c6cc; --ink-3: #8a9aa3;
  --rule: #26384a; --rule-strong: #4a6072; --grid: #2c4256;
  --d1: #183a35; --d2: #24604f; --d3: #5fb59a; --d3-ink: #0b1a17;
  --route: #f0b83a; --route-ink: #13263a; --route-soft: #3a3016;
  --link: #8cc3e0; --trap: #f08a7c; --trap-soft: #3b211e;
  --hatch: #23364a; --code-bg: #1b2b3b;
  color-scheme: dark;
}

/* ---------- 기본 ---------- */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { max-width: 100%; overflow-x: hidden; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", system-ui, sans-serif;
  font-size: 16.5px; line-height: 1.75; word-break: keep-all; overflow-wrap: anywhere;
  font-feature-settings: "tnum" 1;
}
a { color: var(--link); text-decoration: none; text-underline-offset: .2em; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 3px solid var(--route); outline-offset: 2px; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; font-weight: 800; letter-spacing: -0.03em; }
h1 { font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem); }
h2 { font-size: 1.28rem; }
h3 { font-size: 1.06rem; letter-spacing: -0.015em; }
p { margin: .4rem 0 1rem; }
img, iframe, video { max-width: 100%; }
code, pre { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: .9em; }
code { background: var(--code-bg); padding: .08em .35em; border-radius: 3px; }
pre { background: var(--code-bg); padding: .9rem 1rem; overflow-x: auto; line-height: 1.55; border-left: 3px solid var(--rule-strong); }
pre code { background: none; padding: 0; }
blockquote { margin: 1rem 0; padding: .1rem 0 .1rem 1rem; border-left: 3px solid var(--rule-strong); color: var(--ink-2); }
table { border-collapse: collapse; width: 100%; font-size: .95rem; }
th, td { text-align: left; padding: .5rem .6rem; border-bottom: 1px solid var(--rule); vertical-align: top; }
th { color: var(--ink-2); font-weight: 700; border-bottom: 2px solid var(--ink); }
.table-wrap { overflow-x: auto; max-width: 100%; margin: .6rem 0 1.2rem; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }
.muted { color: var(--ink-3); }
.red { color: var(--trap); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.lead { font-size: 1.08rem; color: var(--ink-2); max-width: 40rem; }
.empty, .na-note, .form-pending { color: var(--ink-3); padding: .7rem 1rem; background: repeating-linear-gradient(135deg, transparent 0 7px, var(--hatch) 7px 8px); }

/* ---------- 머리 · 꼬리 ---------- */
.site-head {
  max-width: var(--maxw); margin: 0 auto; padding: 1rem var(--gutter);
  display: grid; grid-template-columns: auto 1fr minmax(12rem, 20rem); gap: .6rem 2rem; align-items: center;
}
.brand { display: flex; align-items: baseline; gap: .6rem; color: var(--ink); flex-wrap: wrap; }
.brand:hover { text-decoration: none; }
.brand-mark { display: none; }
.brand-title { font-weight: 900; letter-spacing: -0.04em; font-size: 1.15rem; }
.brand-sub { color: var(--ink-3); font-size: .88rem; }
.site-nav { display: flex; gap: 1.4rem; font-size: .96rem; }
.site-nav a { color: var(--ink-2); padding: .2rem 0; border-bottom: 2px solid transparent; }
.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 700; border-bottom-color: var(--route); }
.site-nav a:hover { text-decoration: none; color: var(--ink); }
.search { position: relative; margin: 0; }
.search input {
  width: 100%; font: inherit; font-size: .94rem; padding: .45rem .1rem; color: var(--ink);
  background: transparent; border: 0; border-bottom: 1.5px solid var(--rule-strong); border-radius: 0;
}
.search input:focus { outline: none; border-bottom-color: var(--route); }
.search input::placeholder { color: var(--ink-3); }
.search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0; z-index: 20;
  background: var(--sheet); border: 1px solid var(--ink); max-height: 60vh; overflow: auto; padding: .3rem;
}
.search-results a { display: block; padding: .45rem .6rem; color: var(--ink); }
.search-results a:hover { background: var(--d1); text-decoration: none; }
.search-results .where { color: var(--ink-3); font-size: .84rem; }
.search-results .none { padding: .5rem .6rem; color: var(--ink-3); }
main { max-width: var(--maxw); margin: 0 auto; padding: .5rem var(--gutter) 4rem; }
.site-foot {
  max-width: var(--maxw); margin: 0 auto; padding: 1.4rem var(--gutter) 3rem; border-top: 1px solid var(--rule);
  color: var(--ink-3); font-size: .9rem; display: flex; flex-wrap: wrap; justify-content: space-between; gap: .6rem 2rem;
}
.site-foot p { margin: 0; }
.foot-controls { display: flex; flex-wrap: wrap; gap: .5rem 1.4rem; align-items: center; }
.control { display: inline-flex; gap: .45rem; align-items: center; }
.seg { display: inline-flex; border: 1px solid var(--rule-strong); }

/* ---------- 조각 ---------- */
.chip, .badge { display: inline; font-size: .86rem; color: var(--ink-3); background: none; border: 0; padding: 0; }
a.chip { color: var(--link); }
button.chip { font: inherit; font-size: .84rem; cursor: pointer; padding: .1rem .55rem; background: transparent; color: var(--ink-2); border: 0; }
.seg button.chip + button.chip { border-left: 1px solid var(--rule-strong); }
[data-theme-toggle] { border: 1px solid var(--rule-strong) !important; }
button.chip[aria-checked="true"], button.chip.is-on { background: var(--ink); color: var(--paper); }
.badge { font-weight: 700; font-size: .78rem; padding: .05rem .4rem; }
.badge-planned { color: var(--ink-3); background: var(--code-bg); }
.badge-draft { color: var(--link); background: var(--d1); }
.badge-ready { color: var(--d3); background: var(--d1); }
.meta { display: flex; flex-wrap: wrap; gap: .2rem 1.1rem; margin: 0 0 .9rem; font-size: .88rem; color: var(--ink-3); }
.btn { font: inherit; padding: .55rem 1.1rem; border: 1.5px solid var(--ink); background: transparent; color: var(--ink); cursor: pointer; }
.btn-primary { background: var(--ink); color: var(--paper); }
.node-link { color: var(--ink); }
.node-link:hover { text-decoration: none; }
.node-link:hover .node-title { text-decoration: underline; text-decoration-color: var(--route); text-decoration-thickness: 2px; }
.node-link .badge { margin-left: .4rem; }
.node-link.done .node-title::before { content: "✓ "; color: var(--d3); font-weight: 800; }
.os-other .node-title, .node.os-other > .node-head h1 { color: var(--ink-3); }
.os-other .node-title::after { content: " (다른 OS)"; font-size: .8em; color: var(--ink-3); }
.node-list { padding-left: 1.3rem; margin: .4rem 0 1.4rem; }
.node-list li { margin: .4rem 0; }
.node-list .muted { font-size: .92rem; }

/* 학습자 뷰: 계획 노드는 토글이 켜질 때만 */
html:not(.show-planned) a.node-link[data-status="planned"] { display: none; }
html:not(.show-planned) li:has(> a.node-link[data-status="planned"]) { display: none; }
html:not(.show-planned) .search-results a[data-status="planned"] { display: none; }
.n-all, .n-all-only { display: none; }
html.show-planned .n-all, html.show-planned .n-all-only { display: inline; }
html.show-planned .n-live { display: none; }

/* ---------- 첫 화면: 도판 머리 ---------- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 1.5rem 3rem; align-items: end;
  padding: 2.2rem 0 1.8rem; border-bottom: 2px solid var(--ink); margin-bottom: 0;
}
.hero h1 { font-size: clamp(2.6rem, 1.4rem + 5vw, 5.2rem); font-weight: 900; letter-spacing: -0.06em; line-height: .95; margin: 0 0 1rem; }
.hero .lead { margin: 0; font-size: 1.05rem; }
.hero .lead b { color: var(--ink); }
.entry-btns { display: flex; flex-direction: column; margin: 0; border-top: 1px solid var(--rule-strong); }
.entry-btn {
  display: grid; grid-template-columns: 1fr auto; align-items: baseline; gap: .1rem 1rem; text-align: left; font: inherit; cursor: pointer;
  padding: .8rem .1rem; border: 0; border-bottom: 1px solid var(--rule-strong); background: transparent; color: var(--ink);
}
.entry-btn b { font-size: 1.12rem; font-weight: 800; letter-spacing: -0.02em; }
.entry-btn span { color: var(--ink-3); font-size: .88rem; }
.entry-btn:hover { text-decoration: none; background: var(--route-soft); }
.entry-btn:first-child b::before { content: ""; display: inline-block; width: .65em; height: .65em; border-radius: 50%; background: var(--route); margin-right: .55rem; vertical-align: .05em; }
.entry-btn.is-disabled { color: var(--ink-3); cursor: default; }
.entry-btn.is-disabled b { color: var(--ink-3); }
.entry-btn.is-disabled:hover { background: transparent; }
.status-line { grid-column: 1 / -1; display: flex; gap: 1.5rem; color: var(--ink-3); font-size: .9rem; margin: 0; }
.status-line b { color: var(--ink); font-size: 1.05rem; }

.map-section { padding-top: 1.4rem; }
.map-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .4rem 1.2rem; margin-bottom: .6rem; }
.map-head h2 { font-size: 1rem; font-weight: 800; letter-spacing: 0; }
.matrix-legend { display: flex; flex-wrap: wrap; gap: .3rem 1.1rem; font-size: .84rem; color: var(--ink-3); margin: 0; }
.lg::before { content: ""; display: inline-block; width: .95em; height .95em; height: .95em; margin-right: .35em; vertical-align: -0.12em; border: 1px solid var(--grid); }
.lg-live::before { background: linear-gradient(90deg, var(--d1) 0 33%, var(--d2) 33% 66%, var(--d3) 66%); }
.lg-mine::before { background: var(--sheet); border-top: 4px solid var(--route); }
.lg-above::before { background: var(--sheet); border-top: 4px solid var(--route-soft); }
.lg-entry::before { background: var(--route); border-radius: 50%; border-color: var(--route); }
.lg-na::before { background: repeating-linear-gradient(135deg, transparent 0 3px, var(--grid) 3px 4px); }
.map-note { color: var(--ink-3); font-size: .88rem; margin-top: .8rem; }

/* ---------- 지도: 격자 ---------- */
.matrix { margin: 0; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.matrix-head { display: grid; grid-template-columns: var(--label-w) repeat(7, minmax(0, 1fr)); }
.matrix-head .corner { border-right: 1px solid var(--grid); border-bottom: 1px solid var(--ink); }
.stair-head {
  padding: .55rem .6rem .5rem; font-size: .82rem; color: var(--ink-2); line-height: 1.3;
  border-right: 1px solid var(--grid); border-bottom: 1px solid var(--ink); position: relative;
}
.stair-head:last-child { border-right: 1px solid var(--ink); }
.stair-head b { display: block; font-size: 1.7rem; font-weight: 300; color: var(--ink); line-height: 1; margin-bottom: .25rem; }
.stair-head.mine { box-shadow: inset 0 5px 0 var(--route); color: var(--ink); font-weight: 700; }
.stair-head.above { box-shadow: inset 0 5px 0 var(--route-soft); }
.layer-row { display: grid; grid-template-columns: var(--label-w) 1fr; }
.layer-label {
  display: flex; flex-direction: column; justify-content: flex-start; gap: .1rem; padding: .7rem .7rem;
  border-right: 1px solid var(--ink); border-bottom: 1px solid var(--grid); background: var(--paper);
}
.layer-label b { font-size: 2rem; font-weight: 300; line-height: 1; color: var(--ink); }
.layer-name { font-weight: 800; font-size: .95rem; letter-spacing: -0.02em; }
.layer-short { color: var(--ink-3); font-size: .78rem; line-height: 1.35; }
.layer-row:last-child .layer-label, .layer-row:last-child .cell { border-bottom-color: var(--ink); }
.cells { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); height: 100%; }
.cell {
  position: relative; min-height: 7.2rem; padding: .55rem .6rem .6rem; min-width: 0;
  background: var(--sheet); border-right: 1px solid var(--grid); border-bottom: 1px solid var(--grid); font-size: .86rem;
}
.cells .cell:last-child { border-right-color: var(--ink); }
/* 밀도 음영 — 볼 수 있는 노드 수(학습자 뷰), 만들 예정 보기면 전체 수 */
.cell[data-dl="1"] { background: var(--d1); }
.cell[data-dl="2"] { background: var(--d2); }
.cell[data-dl="3"] { background: var(--d3); color: var(--d3-ink); }
html.show-planned .cell[data-da="0"] { background: var(--sheet); color: inherit; }
html.show-planned .cell[data-da="1"] { background: var(--d1); color: inherit; }
html.show-planned .cell[data-da="2"] { background: var(--d2); color: inherit; }
html.show-planned .cell[data-da="3"] { background: var(--d3); color: var(--d3-ink); }
.cell-link { display: flex; align-items: baseline; justify-content: space-between; gap: .4rem; color: inherit; }
.cell-link:hover { text-decoration: none; }
.cell-link:hover .n { text-decoration: underline; text-decoration-color: var(--route); }
.cell-stair { display: none; }
.cell .n { font-weight: 800; font-size: 1.5rem; letter-spacing: -0.03em; line-height: 1; margin-left: auto; color: inherit; }
.cell[data-dl="0"] .n-live, html.show-planned .cell[data-da="0"] .n-all { visibility: hidden; }
.cell-nodes { list-style: none; margin: .45rem 0 0; padding: 0; font-size: .82rem; line-height: 1.38; }
.cell-nodes li { margin: .28rem 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cell-nodes .badge { display: none; }
.cell-nodes .node-link { color: inherit; }
.cell-nodes a.node-link[data-status="planned"] .node-title { color: var(--ink-3); }
.cell[data-dl="3"] .cell-nodes a.node-link[data-status="planned"] .node-title { color: var(--d1); }
.cell .more { display: block; font-size: .8rem; margin-top: .3rem; color: inherit; text-decoration: underline; }
.cell.mine { box-shadow: inset 0 5px 0 var(--route); }
.cell.above { box-shadow: inset 0 5px 0 var(--route-soft); }
.entry-mark {
  display: none; position: absolute; left: .5rem; bottom: .5rem; font-size: .74rem; font-weight: 800;
  background: var(--route); color: var(--route-ink); padding: .1rem .5rem .1rem .45rem; border-radius: 999px 999px 999px 0;
}
.cell.entry .entry-mark { display: inline-block; }
.cell-na {
  display: flex; align-items: flex-end; background: repeating-linear-gradient(135deg, var(--sheet) 0 7px, var(--hatch) 7px 8px);
  color: var(--ink-3); font-size: .78rem; line-height: 1.4;
}
.cell-na .na-hint { background: var(--sheet); padding: .15rem .4rem; color: var(--ink-2); font-weight: 600; }
.cell-na a.na-hint:hover { color: var(--link); }
.band { display: block; }
.cell.band-cell, html.show-planned .cell.band-cell { background: var(--paper); color: var(--ink); }
.band-cell .more { grid-column: 2; padding: 0 .9rem .6rem; margin: 0; color: var(--link); }
.band-cell {
  min-height: 0; display: grid; grid-template-columns: var(--label-w) 1fr; padding: 0; background: var(--paper);
  border-right: 1px solid var(--ink); border-bottom: 2px solid var(--ink);
}
.band-cell .cell-link { display: flex; flex-direction: column; justify-content: flex-start; align-items: flex-start; padding: .7rem; border-right: 1px solid var(--ink); }
.band-name { font-weight: 800; font-size: .95rem; }
.band-name b { display: block; font-size: 2rem; font-weight: 300; line-height: 1; margin-bottom: .1rem; }
.band-q { color: var(--ink-3); font-size: .78rem; line-height: 1.35; margin-top: .1rem; }
.band-cell .n { display: none; }
.band-cell .cell-nodes { display: flex; flex-wrap: wrap; align-content: center; gap: .3rem 1.6rem; margin: 0; padding: .7rem .9rem; font-size: .9rem; }
.band-cell .cell-nodes li { display: block; margin: 0; }
.band-cell .entry-mark { left: auto; right: .6rem; }

/* 자기 배치 */
.placement { background: var(--sheet); border: 1.5px solid var(--ink); padding: 1.2rem 1.4rem 1.4rem; margin: 1.6rem 0 0; }
.placement h2 { margin-bottom: .2rem; }
.placement fieldset { border: 0; padding: 0; margin: 0 0 1rem; }
.placement legend { font-weight: 800; padding: 0; margin-bottom: .25rem; }
.opts { display: flex; flex-wrap: wrap; gap: .2rem 1.2rem; }
.opts label { display: inline-flex; align-items: center; gap: .4rem; padding: .15rem 0; }
.opts input { accent-color: var(--ink); }
.placement .actions { margin: .4rem 0 0; }
.placement-result:empty { display: none; }
.placement-result { margin-top: 1.1rem; }
.result-card { border-left: 5px solid var(--route); background: var(--route-soft); padding: .9rem 1.1rem; }
.result-card .big { font-size: 1.5rem; font-weight: 900; letter-spacing: -0.03em; }
.result-card p { margin: .3rem 0; }

/* ---------- 읽기 판: 노드·칸·경로·목록·FAQ·소개 ---------- */
.node, .cellpage, .pathpage, .faqpage, .aboutpage, .listpage { max-width: var(--readw); margin: 1.8rem auto 0; }
.node-head { margin-bottom: 2rem; }
.node-head h1 { font-size: clamp(1.9rem, 1.3rem + 2.2vw, 2.9rem); font-weight: 900; letter-spacing: -0.05em; line-height: 1.12; margin-bottom: .8rem; }
.node-head .meta a.chip { font-weight: 700; }
.node-head .summary { font-size: 1.14rem; color: var(--ink-2); margin: 0 0 1.2rem; }
.outcome { margin: 0 0 1rem; padding: .8rem 1rem; background: var(--d1); border-left: 5px solid var(--d3); }
.outcome b { display: block; font-size: .86rem; color: var(--d3); margin-bottom: .1rem; }
.revisit { font-size: .88rem; color: var(--ink-3); margin: 0 0 .6rem; }
.revisit b { font-weight: 700; margin-right: .3rem; }
.analogy { border-left: 3px solid var(--route); color: var(--ink); font-size: 1.02rem; }
.also, .prereq { font-size: .92rem; color: var(--ink-2); }
.sec { margin: 2.6rem 0; }
.sec > h2 { font-size: 1.4rem; font-weight: 900; letter-spacing: -0.04em; padding-top: .9rem; border-top: 2px solid var(--ink); margin-bottom: .9rem; }
.sec-article { margin-top: 0; }
.sec-article > h2 { display: none; }
.md { font-size: 1.02rem; }
.md h1 { font-size: 1.55rem; margin-top: 2rem; letter-spacing: -0.04em; }
.md h2 { font-size: 1.3rem; margin-top: 2rem; }
.md h3 { font-size: 1.08rem; margin-top: 1.5rem; }
.md h4 { font-size: 1rem; margin-top: 1.2rem; }
.md ul, .md ol { padding-left: 1.4rem; }
.md li { margin: .3rem 0; }
.md li::marker { color: var(--ink-3); }
.sec-traps > h2 { color: var(--trap); border-top-color: var(--trap); }
.sec-traps .md h2, .sec-traps .md h3 { font-size: 1.06rem; margin-top: 1.4rem; padding: .35rem .7rem; background: var(--trap-soft); border-left: 4px solid var(--trap); }
.sec-try > h2 { border-top-color: var(--d3); }
.video { position: relative; aspect-ratio: 16 / 9; background: var(--ink); overflow: hidden; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.disclosure { font-size: .85rem; color: var(--ink-3); margin-top: .5rem; }
.materials { padding-left: 1.2rem; }
.materials a { font-weight: 700; }
.cmds td code { white-space: nowrap; }
.faq { border-bottom: 1px solid var(--rule); }
.faq:first-of-type { border-top: 1px solid var(--rule); }
.faq summary { cursor: pointer; padding: .8rem 0; font-weight: 700; list-style: none; display: grid; grid-template-columns: 1.6rem 1fr; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; color: var(--route); font-weight: 900; }
.faq[open] summary::before { content: "A"; color: var(--d3); }
.faq-a { padding: 0 0 1rem 1.6rem; color: var(--ink-2); }
.form-note { color: var(--ink-2); font-size: .94rem; }
.form-embed iframe { width: 100%; min-height: 720px; border: 1px solid var(--rule-strong); background: var(--sheet); }
.done-check { display: inline-flex; align-items: center; gap: .6rem; padding: .7rem 1.1rem; border: 1.5px solid var(--ink); cursor: pointer; }
.done-check input { width: 1.15rem; height: 1.15rem; accent-color: var(--d3); }
.done-check:has(input:checked) { background: var(--d1); border-color: var(--d3); }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-top: 2.4rem; border-top: 2px solid var(--ink); }
.prevnext a, .prevnext-empty { display: flex; flex-direction: column; padding: 1rem .2rem; color: var(--ink); min-width: 0; font-weight: 800; letter-spacing: -0.02em; font-size: 1.05rem; }
.prevnext a:hover { text-decoration: none; background: var(--route-soft); }
.prevnext small { color: var(--ink-3); font-size: .8rem; font-weight: 600; letter-spacing: 0; }
.prevnext a[rel="next"], .prevnext .prevnext-empty:last-child { text-align: right; border-left: 1px solid var(--rule); }
.prevnext-empty { color: var(--ink-3); font-weight: 600; }
.order-label { font-size: .92rem; color: var(--ink-2); padding: .5rem .9rem; border-left: 4px solid var(--grid); }
.topic { margin: .8rem 0; }
.topic summary { font-weight: 800; cursor: pointer; }
.path-steps { counter-reset: step; list-style: none; padding: 0; border-top: 1px solid var(--rule); }
.path-step { display: flex; gap: .7rem; align-items: baseline; padding: .7rem .1rem; border-bottom: 1px solid var(--rule); }
.path-step::before { counter-increment: step; content: counter(step); font-weight: 300; font-size: 1.5rem; line-height: 1; color: var(--d3); min-width: 1.6rem; }
.criteria { list-style: none; padding: 0; }
.criteria li { padding: .3rem 0; }
.listpage h3 { margin-top: 1.4rem; }
.analogies li { margin: .5rem 0; }

/* ---------- 폰 ---------- */
@media (max-width: 760px) {
  .site-head { grid-template-columns: 1fr; gap: .5rem; padding-top: .8rem; }
  .site-nav { gap: 1.1rem; overflow-x: auto; }
  .site-foot { flex-direction: column; }
  .hero { grid-template-columns: 1fr; padding-top: 1.4rem; }
  .matrix { border-left: 0; border-top: 0; }
  .matrix-head { display: none; }
  .layer-row { display: block; margin-top: 1.4rem; }
  .layer-label { flex-direction: row; align-items: baseline; gap: .5rem; border: 0; border-bottom: 2px solid var(--ink); padding: 0 0 .35rem; }
  .layer-label b { font-size: 1.5rem; }
  .layer-short { margin-left: auto; text-align: right; }
  .matrix-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; scroll-snap-type: x proximity; margin: 0 calc(-1 * var(--gutter)); }
  .cells { grid-template-columns: repeat(7, 10rem); width: max-content; padding: 0 var(--gutter); }
  .cell { scroll-snap-align: start; min-height: 7rem; border-left: 0; }
  .cells .cell:first-child { border-left: 1px solid var(--grid); }
  .cell-stair { display: inline; font-size: 1.15rem; font-weight: 300; }
  .cell.band-cell { display: block; border: 0; border-bottom: 2px solid var(--ink); }
  .band-cell .more { padding: 0 0 .6rem; }
  .band-cell .cell-link { border-right: 0; border-bottom: 1px solid var(--grid); padding: 0 0 .5rem; flex-direction: row; gap: .5rem; align-items: baseline; flex-wrap: wrap; }
  .band-name b { display: inline; font-size: 1.5rem; margin-right: .3rem; }
  .band-cell .cell-nodes { padding: .6rem 0; flex-direction: column; gap: .3rem; }
  .prevnext { grid-template-columns: 1fr; }
  .prevnext a[rel="next"], .prevnext .prevnext-empty:last-child { text-align: left; border-left: 0; border-top: 1px solid var(--rule); }
  .form-embed iframe { min-height: 640px; }
}
@media (min-width: 761px) and (max-width: 1040px) {
  :root { --label-w: 6.8rem; }
  .site-head { grid-template-columns: 1fr auto; }
  .search { grid-column: 1 / -1; }
  .cell-nodes { display: none; }
  .band-cell .cell-nodes { display: flex; }
  .cell { min-height: 4.6rem; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; } }
@media print {
  .site-head, .site-foot, .sec-ask, .sec-done, .search { display: none; }
  body { background: #fff; color: #000; }
}
@media (max-width: 760px) { .cell.band-cell .cell-nodes { padding-left: 0; margin-left: 0; } }

/* ---------- 강의 (글 대신 영상으로 따라가는 길) ---------- */
.lecture-entry { margin: .9rem 0 0; color: var(--ink-2); }
.lecture-hint { margin: .5rem 0 0; color: var(--ink-2); font-size: .95rem; }
.lecturespage, .watchpage { max-width: var(--readw); margin: 0 auto; padding: 0 var(--gutter); }
.lec-toc { display: flex; flex-wrap: wrap; gap: .4rem; margin: 1.6rem 0 .4rem; padding: .8rem 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--rule); }
.lec-list { list-style: none; padding: 0; margin: .4rem 0 0; counter-reset: lec; }
.lec { counter-increment: lec; position: relative; padding: .85rem 0 .85rem 2.6rem; border-bottom: 1px solid var(--rule); }
.lec::before { content: counter(lec); position: absolute; left: 0; top: .8rem; width: 1.9rem; text-align: right; font-weight: 800; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.lec-has::before { color: var(--ink); }
.lec-title { font-weight: 800; font-size: 1.06rem; letter-spacing: -0.02em; color: var(--ink); }
a.lec-title { color: var(--link); }
.lec-state { margin-left: .5rem; font-size: .78rem; font-weight: 700; padding: .05rem .45rem; border: 1px solid var(--rule-strong); color: var(--ink-3); white-space: nowrap; }
.lec-on { background: var(--route); border-color: var(--route); color: var(--route-ink); }
.lec-sum { margin: .25rem 0 0; color: var(--ink-2); }
.lec-meta { margin: .2rem 0 0; font-size: .88rem; color: var(--ink-3); }
.lec-text { margin-left: .5rem; }
.lec-intro .lec { padding-left: 0; }
.lec-intro .lec::before { content: none; }
.watchpage h1 { margin: .6rem 0 1rem; }
.watchpage .summary { color: var(--ink-2); }
.watch-list { padding-left: 1.4rem; }
.watch-list li { margin: .35rem 0; }
.watch-list li[aria-current="true"] { font-weight: 800; }
.watch-list li[aria-current="true"]::marker { color: var(--route); }