/* Claude 실습 가이드 · 학교 현장 편 — DESIGN.md(claude + 한글 레이어) 토큰만 사용 */
:root {
  --canvas: #faf9f5;
  --surface-soft: #f5f0e8;
  --surface-card: #efe9de;
  --surface-strong: #e8e0d2;
  --paper: #fffdf9;
  --ink: #141413;
  --body: #3d3d3a;
  --body-strong: #252523;
  --muted: #6c6a64;
  --muted-soft: #8e8b82;
  --hairline: #e6dfd8;
  --hairline-soft: #ebe6df;
  --primary: #cc785c;
  --primary-ink: #a2533a;
  --on-primary: #ffffff;
  --dark: #181715;
  --dark-2: #1f1e1b;
  --dark-3: #252320;
  --on-dark: #faf9f5;
  --on-dark-soft: #a09d96;
  --success: #35915a;
  --on-c: #ffffff;
  --error: #c64545;

  --blue: #2e77c8; --rose: #c9636d; --amber: #b3831f; --green: #35915a;
  --sepia: #bd7440; --slate: #5a7390; --violet: #7566c0; --teal: #2b968f;

  --r-sm: 6px; --r-md: 8px; --r-lg: 12px; --r-xl: 16px; --r-pill: 9999px;
  --ease: cubic-bezier(.22,.61,.36,1);
  --shadow: 0 1px 2px rgba(60,40,20,.06), 0 6px 18px rgba(60,40,20,.06);
  --shadow-up: 0 2px 4px rgba(60,40,20,.08), 0 16px 34px rgba(60,40,20,.12);
  --font: "Pretendard Variable", Pretendard, -apple-system, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --serif: "Noto Serif KR", "Nanum Myeongjo", serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, "Pretendard Variable", monospace;
  --wrap: 1180px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas: #181715; --surface-soft: #1f1e1b; --surface-card: #252320; --surface-strong: #2d2a26; --paper: #1f1e1b;
    --ink: #faf9f5; --body: #d9d5cc; --body-strong: #efebe3; --muted: #a09d96; --muted-soft: #8e8b82;
    --hairline: #34312c; --hairline-soft: #2c2a26; --primary: #d98b70; --primary-ink: #e8a58c;
    --blue: #6aa3e3; --rose: #e08a93; --amber: #d6a746; --green: #5dbb82; --sepia: #d9925f; --slate: #8ea6c2; --violet: #a194e0; --teal: #4fbdb5;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.25); --shadow-up: 0 2px 4px rgba(0,0,0,.35), 0 16px 34px rgba(0,0,0,.4);
    --on-c: #141413;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --canvas: #181715; --surface-soft: #1f1e1b; --surface-card: #252320; --surface-strong: #2d2a26; --paper: #1f1e1b;
  --ink: #faf9f5; --body: #d9d5cc; --body-strong: #efebe3; --muted: #a09d96; --muted-soft: #8e8b82;
  --hairline: #34312c; --hairline-soft: #2c2a26; --primary: #d98b70; --primary-ink: #e8a58c;
  --blue: #6aa3e3; --rose: #e08a93; --amber: #d6a746; --green: #5dbb82; --sepia: #d9925f; --slate: #8ea6c2; --violet: #a194e0; --teal: #4fbdb5;
  --shadow: 0 1px 2px rgba(0,0,0,.3), 0 6px 18px rgba(0,0,0,.25); --shadow-up: 0 2px 4px rgba(0,0,0,.35), 0 16px 34px rgba(0,0,0,.4);
  --on-c: #141413;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--canvas); color: var(--body);
  font: 400 17px/1.7 var(--font); word-break: keep-all; overflow-wrap: anywhere;
  text-wrap: pretty; -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { color: var(--ink); text-wrap: balance; margin: 0; }
h2 { font: 600 clamp(28px, 3.4vw, 40px)/1.25 var(--serif); letter-spacing: -.5px; }
h3 { font: 700 21px/1.4 var(--font); }
p { margin: 0; }
a { color: var(--primary-ink); text-underline-offset: 3px; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
button, a, label, summary, input, select, textarea { touch-action: manipulation; -webkit-tap-highlight-color: transparent; }
section[id], .lab { scroll-margin-top: 130px; }
:focus-visible { outline: 2.5px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
[tabindex="-1"]:focus { outline: none; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { width: min(var(--wrap), 100% - 32px); margin-inline: auto; }
.i { font-size: 1.15em; vertical-align: -.15em; }
kbd { color: var(--ink); font: 600 .85em var(--mono); background: var(--surface-card); border: 1px solid var(--hairline); border-bottom-width: 2px; border-radius: 5px; padding: 0 5px; }
code { font: 500 .9em var(--mono); background: var(--surface-card); border-radius: 5px; padding: 1px 5px; }
.muted { color: var(--muted); }
.small { font-size: 14.5px; }

/* 카테고리 색 연동 */
[data-c="blue"] { --c: var(--blue); } [data-c="rose"] { --c: var(--rose); } [data-c="amber"] { --c: var(--amber); }
[data-c="green"] { --c: var(--green); } [data-c="sepia"] { --c: var(--sepia); } [data-c="slate"] { --c: var(--slate); }
[data-c="violet"] { --c: var(--violet); } [data-c="teal"] { --c: var(--teal); }
[data-c], :root { --ci: color-mix(in srgb, var(--c, var(--primary)) 70%, #000); }
:root[data-theme="dark"] [data-c], :root[data-theme="dark"] { --ci: color-mix(in srgb, var(--c, var(--primary)) 82%, #fff); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) [data-c], :root:not([data-theme="light"]) { --ci: color-mix(in srgb, var(--c, var(--primary)) 82%, #fff); } }
.tint { background: linear-gradient(180deg, color-mix(in srgb, var(--c, var(--primary)) 9%, var(--paper)), var(--paper) 62%); }

/* 상단바 */
.site-header { position: sticky; top: 0; z-index: 40; background: color-mix(in srgb, var(--canvas) 90%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--hairline-soft); }
.bar { display: flex; align-items: center; gap: 14px; height: 64px; padding: 0 20px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); flex: none; background: none; border: 0; padding: 0; }
.brand-mark { width: 36px; height: 36px; border-radius: 10px; flex: none; display: block; }
.brand-name { font-weight: 800; font-size: 17px; line-height: 1.15; display: block; text-align: left; letter-spacing: -.01em; white-space: nowrap; }
.brand-sub { display: block; font-size: 12px; color: var(--muted); font-weight: 500; text-align: left; }
.nav { display: flex; gap: 2px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav button { background: none; border: 0; padding: 8px 11px; border-radius: var(--r-md); color: var(--body); font-weight: 600; font-size: 14.5px; white-space: nowrap; transition: background .3s var(--ease), color .3s var(--ease); }
.nav button:hover { background: var(--surface-card); color: var(--ink); }
.tools { display: flex; gap: 6px; align-items: center; flex: none; margin-left: auto; }
.icon-btn { width: 40px; height: 40px; border-radius: var(--r-pill); border: 1px solid var(--hairline); background: var(--paper); display: grid; place-items: center; color: var(--ink); font-size: 19px; transition: background .3s var(--ease), translate .3s var(--ease); }
.icon-btn:hover { background: var(--surface-card); }
.progress-pill { display: flex; align-items: center; gap: 6px; height: 40px; padding: 0 14px; border-radius: var(--r-pill); background: var(--surface-card); border: 0; font-size: 13.5px; font-weight: 700; color: var(--ink); white-space: nowrap; }
.progress-pill .ring { --p: 0; width: 18px; height: 18px; border-radius: 50%; background: conic-gradient(var(--primary) calc(var(--p) * 1%), var(--hairline) 0); }

.subbar { border-top: 1px solid var(--hairline-soft); }
.subbar-in { display: flex; align-items: center; gap: 14px; height: 50px; }
.part-tabs { display: flex; gap: 4px; flex: none; }
.part-tab { border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 5px 13px; font-size: 13.5px; font-weight: 700; color: var(--body); transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease); white-space: nowrap; }
.part-tab[aria-selected="true"] { background: var(--ink); border-color: var(--ink); color: var(--canvas); }
.jump { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: thin; padding-block: 6px; mask-image: linear-gradient(90deg, #000 92%, transparent); }
.jump button { border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 4px 11px; font-size: 13px; font-weight: 600; white-space: nowrap; color: var(--body); transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease); }
.jump button b { color: var(--ci); font-weight: 800; margin-right: 3px; }
.jump button:hover { border-color: var(--c); color: var(--ink); }
.jump button.done { background: color-mix(in srgb, var(--c) 12%, var(--paper)); border-color: color-mix(in srgb, var(--c) 40%, var(--paper)); }

/* 공통 버튼 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 20px; border-radius: var(--r-md); border: 1px solid transparent; font-weight: 700; font-size: 15.5px; text-decoration: none; white-space: nowrap; transition: background .3s var(--ease), translate .3s var(--ease), box-shadow .3s var(--ease), scale .15s; }
.btn:active { scale: .96; }
.btn-primary { background: var(--primary-ink); color: #fff; }
.btn-primary:hover { background: color-mix(in srgb, var(--primary-ink) 85%, #000); }
:root[data-theme="dark"] .btn-primary { color: #141413; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary { color: #141413; } }
.btn-fill { background: var(--ci); color: var(--on-c); }
.btn-fill:hover { filter: brightness(.92); }
.btn-ghost { background: var(--paper); border-color: var(--hairline); color: var(--ink); }
.btn-ghost:hover { background: var(--surface-card); }
.btn-sm { min-height: 38px; padding: 0 14px; font-size: 14px; }

/* 히어로 */
.hero { padding: 56px 0 40px; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.kicker { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 14px; color: var(--ci); background: color-mix(in srgb, var(--primary) 12%, var(--paper)); padding: 6px 13px; border-radius: var(--r-pill); }
.hero h1 { font: 700 clamp(32px, 3.6vw, 48px)/1.22 var(--serif); letter-spacing: -1px; margin: 20px 0 18px; }
.hero h1 em { font-style: normal; color: var(--ci); }
.nowrap { white-space: nowrap; }
.lead { font-size: 18.5px; color: var(--body); max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.hero-figure { margin: 0; position: relative; }
.hero-figure .shot { border-radius: var(--r-xl); box-shadow: var(--shadow-up); border: 1px solid var(--hairline); }
.hero-figure figcaption { font-size: 13.5px; color: var(--muted); margin-top: 12px; text-align: center; }

/* 처음이신가요 */
.first { padding: 8px 0 20px; }
.first-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.first-card { border: 1px solid var(--hairline); border-radius: var(--r-xl); padding: 22px 22px 20px; background: var(--paper); text-align: left; display: grid; gap: 8px; align-content: start; }
.first-card .n { width: 34px; height: 34px; border-radius: 50%; background: var(--ci); color: var(--on-c); display: grid; place-items: center; font-weight: 800; }
.first-card .h3 { font: 700 18px/1.4 var(--font); }
.first-card p { font-size: 15px; color: var(--muted); }
.first-card .go { font-weight: 700; font-size: 14.5px; color: var(--ci); margin-top: 4px; display: inline-flex; gap: 4px; align-items: center; }

/* 섹션 */
.section { padding: 84px 0; }
.section.alt { background: var(--surface-soft); }
.section.ink { background: var(--dark); color: var(--on-dark-soft); }
.section.ink h2, .section.ink h3 { color: var(--on-dark); }
.sec-head { max-width: 760px; margin-bottom: 36px; }
.sec-head .eyebrow { display: block; font-size: 13px; font-weight: 800; letter-spacing: 1.2px; color: var(--ci); margin-bottom: 12px; }
.sec-head p { margin-top: 14px; font-size: 17.5px; color: var(--muted); }
.part-flag { display: inline-flex; align-items: center; gap: 8px; font-weight: 800; font-size: 14px; color: var(--on-c); background: var(--ci); padding: 6px 14px; border-radius: var(--r-pill); margin-bottom: 18px; }

/* 진행 순서 */
.flow { display: grid; gap: 28px; }
.flow-part h3 { font: 600 20px/1.3 var(--serif); margin-bottom: 10px; display: flex; gap: 10px; align-items: center; }
.flow-part h3 .dot { width: 12px; height: 12px; border-radius: 4px; background: var(--c); }
.flow-list { border-radius: var(--r-lg); border: 1px solid var(--hairline); overflow: hidden; background: var(--paper); }
.flow-row { display: grid; grid-template-columns: 44px 1fr 90px 1fr; gap: 14px; align-items: center; width: 100%; text-align: left; background: none; border: 0; padding: 13px 18px; border-top: 1px solid var(--hairline-soft); color: var(--body); transition: background .3s var(--ease); }
.flow-row:first-child { border-top: 0; }
.flow-row:hover { background: color-mix(in srgb, var(--c) 7%, var(--paper)); }
.flow-n { font: 600 18px var(--serif); color: var(--ci); }
.flow-title { font-weight: 700; color: var(--ink); }
.flow-title .tag { font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: var(--r-pill); margin-left: 6px; background: var(--surface-card); color: var(--body); vertical-align: 2px; }
.flow-min { font-size: 14px; color: var(--muted); }
.flow-out { font-size: 14.5px; color: var(--muted); }

/* 단계 카드 (설치 등) */
.step-list { display: grid; gap: 18px; }
.step { display: grid; grid-template-columns: 1fr 1.15fr; gap: 28px; align-items: center; padding: 26px; border: 1px solid var(--hairline); border-radius: var(--r-xl); }
.step.no-img { grid-template-columns: 1fr; }
.step-n { font-size: 13px; font-weight: 800; letter-spacing: 1px; color: var(--ci); }
.step h3 { margin: 6px 0 10px; font: 600 23px/1.35 var(--serif); }
.step p + p { margin-top: 10px; }
.step .warn-line { font-size: 14.5px; color: var(--muted); display: flex; gap: 7px; margin-top: 12px; }
.step .warn-line .i { color: var(--rose); flex: none; margin-top: 4px; }
.step .btn { margin-top: 16px; }
.step figure { margin: 0; }

/* 그림 */
.shot { height: auto; border-radius: var(--r-lg); border: 1px solid var(--hairline); background: var(--paper); width: 100%; cursor: zoom-in; }
figure { margin: 0; }
figcaption { font-size: 14px; color: var(--muted); margin-top: 10px; }
.fig-wide { margin-top: 36px; }
.fig-wide .shot { box-shadow: var(--shadow); }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 28px; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; }

/* 개념 카드 */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.cards[data-n="4"] { grid-template-columns: repeat(4, 1fr); }
.cards[data-n="2"] { grid-template-columns: repeat(2, 1fr); }
.ccard { border: 1px solid var(--hairline); border-radius: var(--r-xl); padding: 22px; display: grid; gap: 8px; align-content: start; }
.ccard .ic { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; background: color-mix(in srgb, var(--c) 14%, var(--paper)); color: var(--ci); font-size: 22px; }
.ccard .h4 { font: 700 17.5px/1.4 var(--font); color: var(--ink); }
.ccard p { font-size: 15px; color: var(--muted); }
.ccard .path { font: 600 13px var(--font); color: var(--ci); }

.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--hairline); border-radius: var(--r-xl); overflow: hidden; margin-top: 28px; }
.compare > div { padding: 24px; }
.compare > div + div { border-left: 1px solid var(--hairline); }
.compare .h4 { font: 600 20px var(--serif); color: var(--ink); margin-bottom: 12px; display: flex; gap: 8px; align-items: center; }
.compare ul { margin: 0; padding-left: 1.1em; display: grid; gap: 6px; font-size: 15.5px; }

.tip { border-radius: var(--r-xl); padding: 24px 26px; margin-top: 28px; border: 1px solid color-mix(in srgb, var(--c, var(--primary)) 30%, var(--hairline)); }
.tip-title { font-weight: 800; color: var(--ci); display: flex; gap: 8px; align-items: center; margin-bottom: 10px; font-size: 15.5px; }
.tip ul { margin: 0; padding-left: 1.1em; display: grid; gap: 7px; font-size: 15.5px; }
.tip p { font-size: 15.5px; }

.principles { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.principles span { font-weight: 700; font-size: 14.5px; padding: 8px 15px; border-radius: var(--r-pill); background: color-mix(in srgb, var(--c) 11%, var(--paper)); color: var(--ink); border: 1px solid color-mix(in srgb, var(--c) 26%, var(--paper)); }

/* 표 */
.table-wrap { overflow-x: auto; border: 1px solid var(--hairline); border-radius: var(--r-lg); background: var(--paper); margin-top: 12px; }
table.tbl { font-variant-numeric: tabular-nums; border-collapse: collapse; width: 100%; min-width: 520px; font-size: 15px; }
.tbl th { text-align: left; font-weight: 700; color: var(--ink); background: color-mix(in srgb, var(--c, var(--primary)) 9%, var(--paper)); padding: 11px 14px; }
.tbl td { padding: 11px 14px; border-top: 1px solid var(--hairline-soft); vertical-align: top; }
.tbl td:first-child { font-weight: 700; color: var(--ink); }
.caption { font-size: 14.5px; color: var(--muted); margin-top: 10px; }
.block-label { font-size: 13px; font-weight: 800; letter-spacing: .6px; color: var(--ci); margin: 36px 0 4px; }

/* 실습 카드 */
.lab { padding: 36px 0; }
.lab-card { border: 1px solid color-mix(in srgb, var(--c) 28%, var(--hairline)); border-radius: 20px; overflow: hidden; background: var(--paper); box-shadow: var(--shadow); }
.lab-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; padding: 22px 26px; background: linear-gradient(180deg, color-mix(in srgb, var(--c) 14%, var(--paper)), color-mix(in srgb, var(--c) 5%, var(--paper))); border-bottom: 1px solid color-mix(in srgb, var(--c) 20%, var(--hairline)); }
.lab-no { font-weight: 800; font-size: 14px; color: var(--on-c); background: var(--ci); padding: 5px 12px; border-radius: var(--r-pill); }
.lab-head h3 { font: 600 clamp(21px, 2.4vw, 26px)/1.35 var(--serif); flex: 1 1 280px; }
.lab-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.chip { font-size: 13px; font-weight: 700; padding: 4px 11px; border-radius: var(--r-pill); background: var(--paper); border: 1px solid var(--hairline); color: var(--body); white-space: nowrap; }
.chip.done { background: var(--success); border-color: var(--success); color: var(--on-c); }
.lab-body { padding: 26px; display: grid; gap: 26px; }
.goal { font-size: 17px; color: var(--ink); display: flex; gap: 10px; }
.goal b { flex: none; color: var(--ci); }
.notice { font-size: 15.5px; border-radius: var(--r-lg); padding: 14px 16px; background: var(--surface-soft); display: flex; gap: 10px; }
.notice .i { color: var(--ci); flex: none; margin-top: 4px; }
.warnbox { font-size: 15.5px; border-radius: var(--r-lg); padding: 14px 16px; background: color-mix(in srgb, var(--rose) 9%, var(--paper)); border: 1px solid color-mix(in srgb, var(--rose) 25%, var(--paper)); display: flex; gap: 10px; color: var(--body-strong); }
.warnbox .i { color: var(--rose); flex: none; margin-top: 4px; }
.lab-label { font-size: 13px; font-weight: 800; letter-spacing: .6px; color: var(--ci); margin-bottom: 10px; display: flex; gap: 6px; align-items: center; }
.lab-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: start; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; }
.checks label { display: grid; grid-template-columns: 24px 26px 1fr; gap: 6px; align-items: start; padding: 9px 12px; border-radius: var(--r-md); cursor: pointer; transition: background .3s var(--ease); }
.checks label:hover { background: var(--surface-soft); }
.checks input { width: 19px; height: 19px; margin: 4px 0 0; accent-color: var(--c); }
.checks .sn { font: 600 16px var(--serif); color: var(--ci); }
.checks input:checked ~ .st { color: var(--muted); text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--muted) 50%, transparent); }
.shots { display: grid; gap: 14px; }
.shots figure figcaption { margin-top: 6px; font-size: 13.5px; }

/* 프롬프트 카드 */
.prompt { border-radius: var(--r-lg); overflow: hidden; background: var(--dark); color: var(--on-dark); border: 1px solid var(--dark-3); }
.prompt + .prompt { margin-top: 16px; }
.prompt-head { display: flex; align-items: center; gap: 10px; padding: 14px 16px 14px 20px; border-bottom: 1px solid var(--dark-3); flex-wrap: wrap; }
.prompt-head .ptitle { font-size: 16.5px; color: var(--on-dark); flex: 1 1 260px; }
.prompt-actions { display: flex; gap: 6px; }
.pbtn { display: inline-flex; gap: 6px; align-items: center; min-height: 38px; padding: 0 14px; border-radius: var(--r-pill); border: 1px solid #3b3833; background: var(--dark-3); color: var(--on-dark); font-size: 14px; font-weight: 700; transition: background .3s var(--ease), scale .15s; white-space: nowrap; }
.pbtn:hover { background: #34312c; }
.pbtn:active { scale: .95; }
.pbtn.copy { background: #a9583e; border-color: #a9583e; color: #fff; }
.pbtn.copy:hover { background: #8f4630; }
.pbtn.copied { background: var(--success); border-color: var(--success); }
.prompt pre { margin: 0; padding: 18px 20px; font: 400 15px/1.75 var(--mono); white-space: pre-wrap; word-break: keep-all; overflow-wrap: anywhere; color: #ece8df; max-height: none; }
.prompt pre .ph { color: #ffc9a8; background: rgba(217,139,112,.16); border-radius: 4px; padding: 0 3px; }
.prompt pre .lbl { color: #f0b79f; font-weight: 700; }
.prompt pre .ph.filled { color: #a8e6bd; background: rgba(93,187,130,.14); }
.prompt details summary { cursor: pointer; padding: 10px 20px; color: #f0b79f; font-size: 14px; font-weight: 700; border-top: 1px dashed #3b3833; list-style: none; }
.prompt details summary::-webkit-details-marker { display: none; }
.prompt-note { padding: 14px 20px; font-size: 14.5px; color: var(--on-dark-soft); border-top: 1px solid var(--dark-3); background: var(--dark-2); }
.prompt-note code { background: var(--dark-3); color: var(--on-dark); }
.fill { display: none; padding: 14px 20px 16px; background: var(--dark-2); border-bottom: 1px solid var(--dark-3); }
.fill.open { display: grid; gap: 10px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.fill label { display: grid; gap: 4px; font-size: 13px; color: var(--on-dark-soft); font-weight: 600; }
.fill input { background: var(--dark); border: 1px solid #3b3833; border-radius: var(--r-md); padding: 9px 11px; color: var(--on-dark); font-size: 15px; }
.fill input:focus { border-color: var(--primary); outline: none; }
.fill-hint { grid-column: 1 / -1; font-size: 13.5px; color: var(--on-dark-soft); }

/* 링크·파일 */
.files { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.file-link { display: inline-flex; gap: 8px; align-items: center; padding: 8px 14px; border-radius: var(--r-md); border: 1px solid var(--hairline); background: var(--paper); text-decoration: none; color: var(--ink); font-weight: 600; font-size: 14.5px; transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease); }
.file-link:hover { border-color: var(--c); }
.file-link .hint { font-weight: 400; color: var(--muted); font-size: 13.5px; }

/* 막히면 */
details.trouble { border: 1px solid var(--hairline); border-radius: var(--r-lg); background: var(--surface-soft); }
details.trouble > summary { cursor: pointer; padding: 14px 18px; font-weight: 800; color: var(--ink); list-style: none; display: flex; gap: 8px; align-items: center; }
details.trouble > summary::-webkit-details-marker { display: none; }
details.trouble > summary::after { content: "+"; margin-left: auto; font-size: 20px; color: var(--muted); }
details.trouble[open] > summary::after { content: "−"; }
.tr-list { display: grid; gap: 0; padding: 0 18px 12px; }
.tr-item { display: grid; grid-template-columns: minmax(180px, .9fr) 1.6fr; gap: 16px; padding: 12px 0; border-top: 1px solid var(--hairline); font-size: 15.5px; }
.tr-item b { color: var(--ink); }

.lab-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; justify-content: space-between; padding: 18px 26px; border-top: 1px solid var(--hairline); background: var(--surface-soft); }
.lab-out { font-size: 15.5px; }
.lab-out b { color: var(--ci); margin-right: 6px; }

/* 자료실 */
.dl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 16px; }
.dl-card { border: 1px solid var(--hairline); border-radius: var(--r-xl); padding: 22px; display: grid; gap: 10px; align-content: start; text-decoration: none; color: inherit; }
.dl-card h3 { font-size: 18px; }
.dl-card p { font-size: 15px; color: var(--muted); }
.dl-card .go { font-weight: 800; color: var(--ci); font-size: 15px; display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; }
.badge { justify-self: start; font-size: 12px; font-weight: 800; letter-spacing: .4px; padding: 3px 9px; border-radius: var(--r-sm); color: var(--on-c); background: var(--ci); }
.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; margin-top: 14px; }
.link-card { display: grid; gap: 4px; padding: 16px 18px; border: 1px solid var(--hairline); border-radius: var(--r-lg); background: var(--paper); text-decoration: none; color: var(--body); }
.link-card b { color: var(--ink); display: flex; gap: 6px; align-items: center; }
.link-card span { font-size: 14px; color: var(--muted); }

/* 프롬프트 도서관 */
.lib-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.lib-tabs button { border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 8px 15px; font-weight: 700; font-size: 14.5px; color: var(--body); transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease); }
.lib-tabs button[aria-selected="true"] { background: var(--ci); border-color: var(--ci); color: var(--on-c); }
.lib-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: start; }
.lib-grid .prompt + .prompt { margin-top: 0; }

/* 안전 */
.safety-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.safety-grid article { border: 1px solid var(--hairline); border-radius: var(--r-xl); padding: 22px; display: grid; gap: 6px; }
.safety-grid .n { font: 600 28px var(--serif); color: var(--ci); }
.safety-grid h3 { font-size: 18px; }
.safety-grid p { font-size: 15px; color: var(--muted); }

/* FAQ */
.faq-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.faq-filter button { border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 6px 14px; font-weight: 700; font-size: 14px; color: var(--body); }
.faq-filter button[aria-pressed="true"] { background: var(--ink); color: var(--canvas); border-color: var(--ink); }
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: start; }
.faq { border: 1px solid var(--hairline); border-radius: var(--r-lg); background: var(--paper); }
.faq summary { cursor: pointer; list-style: none; padding: 16px 18px; display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: start; font-weight: 700; color: var(--ink); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .cat { font-size: 12px; font-weight: 800; padding: 3px 8px; border-radius: var(--r-sm); background: color-mix(in srgb, var(--c) 14%, var(--paper)); color: var(--ci); margin-top: 3px; white-space: nowrap; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--muted); line-height: 1.2; }
.faq[open] summary::after { content: "−"; }
.faq .a { padding: 0 18px 18px; font-size: 15.5px; }
.faq .a p + p { margin-top: 8px; }

/* 게시판 */
.board-form { border: 1px solid var(--hairline); border-radius: 20px; background: var(--paper); padding: 26px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; box-shadow: var(--shadow); }
.board-form h3 { font: 600 22px var(--serif); }
.kind-tabs { display: flex; flex-wrap: wrap; gap: 8px; }
.kind-tabs label { position: relative; }
.kind-tabs input { position: absolute; opacity: 0; }
.kind-tabs span { display: inline-flex; gap: 6px; align-items: center; padding: 8px 15px; border-radius: var(--r-pill); border: 1px solid var(--hairline); font-weight: 700; font-size: 14.5px; cursor: pointer; transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease); }
.kind-tabs input:checked + span { background: var(--ci); border-color: var(--ci); color: var(--on-c); }
.kind-tabs input:focus-visible + span { outline: 2.5px solid var(--primary); outline-offset: 2px; }
.form-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.field { display: grid; gap: 6px; font-size: 14.5px; font-weight: 700; color: var(--ink); align-content: start; }
.field .help { font-weight: 400; color: var(--muted); font-size: 13.5px; }
.field input, .field select, .field textarea { border: 1px solid var(--hairline); border-radius: var(--r-md); background: var(--canvas); padding: 11px 13px; font-weight: 400; font-size: 15.5px; color: var(--ink); min-height: 46px; }
.field textarea { resize: vertical; line-height: 1.6; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--primary); outline: 2px solid color-mix(in srgb, var(--primary) 30%, transparent); }
.field ::placeholder { color: var(--muted-soft); }
.drop { border: 1.5px dashed var(--hairline); border-radius: var(--r-lg); padding: 16px; display: flex; gap: 14px; align-items: center; background: var(--canvas); }
.drop.over { border-color: var(--primary); background: color-mix(in srgb, var(--primary) 7%, var(--canvas)); }
.drop img { width: 88px; height: 64px; object-fit: cover; border-radius: var(--r-sm); }
.drop > div { min-width: 0; } .drop input[type=file] { max-width: 100%; }
.form-foot { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.msg { font-size: 15px; font-weight: 600; }
.msg.error { color: var(--error); } .msg.done { color: var(--success); }
.privacy-line { font-size: 14px; color: var(--muted); display: flex; gap: 8px; }
.privacy-line .i { color: var(--rose); flex: none; margin-top: 3px; }

.board-tools { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 32px 0 16px; }
.board-tools .kind-tabs span { padding: 6px 13px; font-size: 14px; }
.board-tools select, .board-tools input[type="search"] { color: var(--ink); border: 1px solid var(--hairline); border-radius: var(--r-pill); background: var(--paper); padding: 8px 14px; font-size: 14.5px; min-height: 40px; }
.board-tools input[type="search"] { flex: 1 1 200px; }
.board-status { font-size: 13.5px; color: var(--muted); margin-left: auto; display: flex; gap: 6px; align-items: center; }
.live { width: 8px; height: 8px; border-radius: 50%; background: var(--success); }
.board-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 18px; }
.post { border: 1px solid var(--hairline); border-radius: var(--r-xl); background: var(--paper); display: grid; grid-template-rows: 1fr auto; overflow: hidden; }
.post-open { all: unset; cursor: pointer; display: grid; grid-template-rows: auto 1fr; }
.post-open:focus-visible { outline: 2.5px solid var(--primary); outline-offset: -3px; border-radius: var(--r-xl); }
.post-thumb { display: block; aspect-ratio: 16 / 9; background: var(--surface-soft); border-bottom: 1px solid var(--hairline); overflow: hidden; }
.post-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: scale .5s var(--ease); }
.post:hover .post-thumb img { scale: 1.04; }
.post-thumb.none { aspect-ratio: auto; height: 8px; border-bottom: 0; background: color-mix(in srgb, var(--c) 55%, var(--paper)); font-size: 0; }
.post-body { display: grid; gap: 9px; align-content: start; padding: 16px 18px 12px; }
.post-top { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.chip.kind { color: var(--ci); border-color: color-mix(in srgb, var(--c) 35%, transparent); display: inline-flex; gap: 4px; align-items: center; }
.post-skill { font: 600 14.5px var(--mono); color: var(--ci); }
.post-text { font-size: 15px; line-height: 1.6; color: var(--body); display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; white-space: pre-line; word-break: keep-all; overflow-wrap: anywhere; }
.post-who { font-weight: 800; color: var(--ink); font-size: 14.5px; display: flex; flex-wrap: wrap; gap: 2px 8px; align-items: baseline; }
.post-who span { font-weight: 500; color: var(--muted); font-size: 13.5px; }
.post-who .when { margin-left: auto; }
.post-actions { display: flex; gap: 6px; flex-wrap: wrap; padding: 0 14px 14px; }
.post-actions button, .post-actions a { display: inline-flex; align-items: center; gap: 5px; border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 5px 12px; font-size: 13.5px; font-weight: 700; color: var(--body); text-decoration: none; min-height: 34px; cursor: pointer; transition: border-color .2s var(--ease), background-color .2s var(--ease); }
.post-actions button:hover, .post-actions a:hover { border-color: var(--c, var(--primary)); }
.post-actions .liked { background: color-mix(in srgb, var(--rose) 12%, var(--paper)); border-color: var(--rose); color: var(--rose); }
.post-actions .danger:hover { border-color: var(--error); color: var(--error); }
.board-pager { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; justify-content: center; margin: 26px 0 4px; }
.board-pager button { min-width: 40px; height: 40px; border-radius: var(--r-pill); border: 1px solid var(--hairline); background: var(--paper); font-weight: 700; color: var(--body); cursor: pointer; display: inline-grid; place-items: center; }
.board-pager button[aria-current="page"] { background: var(--ink); border-color: var(--ink); color: var(--canvas); }
.board-pager button:disabled { opacity: .4; cursor: default; }
.board-pager .gap { color: var(--muted); padding: 0 2px; }
.board-pager .range { width: 100%; text-align: center; font-size: 13px; color: var(--muted); margin-top: 4px; }
dialog.post-view { border: 0; padding: 0; width: min(760px, 100% - 24px); max-height: min(88vh, 900px); border-radius: 22px; background: var(--paper); color: var(--body); box-shadow: var(--shadow-up); overflow: visible; }
dialog.post-view::backdrop { background: rgba(20,18,16,.55); backdrop-filter: blur(3px); }
.pv-in { position: relative; display: grid; grid-template-rows: auto 1fr auto; max-height: min(88vh, 900px); }
.pv-head { display: flex; gap: 8px; align-items: center; padding: 16px 18px 12px 22px; border-bottom: 1px solid var(--hairline); }
.pv-head h3 { font-size: 20px; }
.pv-count { margin-left: auto; font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.pv-edit .pv-head .icon-btn { margin-left: auto; }
.pv-body { overflow: auto; padding: 20px 26px; display: grid; gap: 12px; align-content: start; }
.pv-who { font-size: 21px; }
.pv-who span { font-size: 15px; font-weight: 500; color: var(--muted); margin-left: 8px; }
.pv-when { margin: -6px 0 0; font-size: 13px; color: var(--muted); }
.pv-text { font-size: 16px; line-height: 1.75; white-space: pre-wrap; overflow-wrap: anywhere; margin: 0; }
.pv-img { width: 100%; border-radius: var(--r-lg); border: 1px solid var(--hairline); }
.pv-md summary { cursor: pointer; font-weight: 700; }
.pv-actions { padding: 14px 22px 18px; border-top: 1px solid var(--hairline); }
.pv-nav { position: absolute; top: 50%; translate: 0 -50%; width: 46px; height: 46px; border-radius: 50%; border: 1px solid var(--hairline); background: var(--paper); box-shadow: var(--shadow); display: grid; place-items: center; font-size: 20px; color: var(--ink); cursor: pointer; transition: scale .2s var(--ease); }
.pv-nav:hover:not(:disabled) { scale: 1.08; }
.pv-nav:disabled { opacity: 0; pointer-events: none; }
.pv-nav.prev { left: -64px; } .pv-nav.next { right: -64px; }
.pv-edit { padding-bottom: 20px; }
.pv-edit > :not(.pv-head) { margin: 0 24px; }
.pv-edit { gap: 14px; grid-template-rows: none; }
@media (max-width: 900px) { .pv-nav { width: 40px; height: 40px; background: color-mix(in srgb, var(--paper) 88%, transparent); } .pv-nav.prev { left: 6px; } .pv-nav.next { right: 6px; } }
.skill-md { background: var(--dark); color: #ece8df; border-radius: var(--r-md); font: 13.5px/1.65 var(--mono); padding: 12px 14px; white-space: pre-wrap; max-height: 280px; overflow: auto; margin-top: 6px; }
.board-empty { text-align: center; padding: 48px 20px; border: 1.5px dashed var(--hairline); border-radius: var(--r-xl); color: var(--muted); }
.skeleton { height: 150px; border-radius: var(--r-xl); background: linear-gradient(90deg, var(--surface-card), var(--surface-soft), var(--surface-card)); background-size: 200% 100%; animation: sh 1.4s infinite linear; margin-bottom: 16px; break-inside: avoid; }
@keyframes sh { to { background-position: -200% 0; } }

/* 마무리 · 연락처 */
.closing { text-align: center; padding: 96px 0; background: var(--dark); color: var(--on-dark-soft); }
.closing h2 { color: var(--on-dark); font-size: clamp(30px, 4vw, 46px); }
.closing p { margin: 16px auto 28px; max-width: 34em; font-size: 17.5px; }
.contact { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; border: 1px solid var(--hairline); border-radius: 20px; padding: 28px; max-width: 760px; margin: 0 auto; }
.avatar { width: 112px; height: 112px; border-radius: 50%; object-fit: cover; border: 3px solid var(--paper); box-shadow: var(--shadow); }
.contact h3 { font: 600 24px var(--serif); }
.contact p { color: var(--muted); font-size: 15.5px; margin-top: 6px; }
.contact .row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 16px; }
.contact .mail { font-size: 14.5px; color: var(--muted); }
footer { padding: 40px 0 110px; font-size: 14px; color: var(--muted); text-align: center; }

/* 빠른 메뉴 */
.fab { position: fixed; right: 18px; bottom: 18px; z-index: 50; display: grid; justify-items: end; gap: 10px; }
.fab-btn { width: 54px; height: 54px; border-radius: 50%; border: 0; background: var(--ink); color: var(--canvas); font-size: 24px; display: grid; place-items: center; box-shadow: var(--shadow-up); transition: scale .15s, translate .3s var(--ease); }
.fab-btn:hover { translate: 0 -3px; }
.fab-menu { overscroll-behavior: contain; display: none; background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--r-xl); box-shadow: var(--shadow-up); padding: 8px; min-width: 220px; max-height: 70vh; overflow: auto; }
.fab.open .fab-menu { display: grid; }
.fab-menu button { text-align: left; background: none; border: 0; padding: 9px 12px; border-radius: var(--r-md); font-weight: 600; font-size: 14.5px; color: var(--body); display: flex; gap: 8px; align-items: center; }
.fab-menu button:hover { background: var(--surface-card); }
.fab-menu hr { border: 0; border-top: 1px solid var(--hairline); margin: 4px 0; }

/* 라이트박스 */
.lightbox { overscroll-behavior: contain; position: fixed; inset: 0; z-index: 80; background: rgba(20,18,16,.86); display: none; place-items: center; padding: 24px; }
.lightbox.open { display: grid; }
.lightbox img { max-width: min(1600px, 96vw); max-height: 86vh; border-radius: var(--r-lg); background: #fff; cursor: zoom-out; }
.lightbox p { color: #eee; text-align: center; margin-top: 12px; font-size: 15px; }
.lightbox .close { position: absolute; top: 16px; right: 16px; width: 46px; height: 46px; border-radius: 50%; border: 0; background: rgba(255,255,255,.14); color: #fff; font-size: 22px; }
.toast { position: fixed; left: 50%; bottom: 28px; translate: -50% 20px; opacity: 0; z-index: 90; background: var(--ink); color: var(--canvas); padding: 11px 20px; border-radius: var(--r-pill); font-weight: 700; font-size: 15px; transition: opacity .3s var(--ease), translate .3s var(--ease); pointer-events: none; }
.toast.show { opacity: 1; translate: -50% 0; }

/* 게시판으로 이동했을 때 양식 강조 */
.board-form.flash { animation: flash 1.6s var(--ease); }
@keyframes flash { 0%, 60% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 55%, transparent), var(--shadow-up); } 100% { box-shadow: var(--shadow); } }


/* ───────── 책 구조: 왼쪽 목차 + 한 페이지씩 ───────── */
:root { --toc-w: 292px; --head-h: 64px; }
.shell { display: grid; grid-template-columns: var(--toc-w) minmax(0, 1fr); align-items: start; }
.toc { position: sticky; top: var(--head-h); height: calc(100vh - var(--head-h)); overflow-y: auto; border-right: 1px solid var(--hairline-soft); background: var(--surface-soft); overscroll-behavior: contain; scrollbar-width: thin; }
.toc-in { padding: 18px 12px 40px; display: grid; gap: 18px; }
.toc-label { font-size: 12.5px; font-weight: 800; letter-spacing: .5px; color: var(--ci); padding: 0 10px; margin-bottom: 4px; }
.toc ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 1px; }
.toc-item { width: 100%; display: grid; grid-template-columns: 26px 1fr auto; gap: 8px; align-items: center; text-align: left; border: 0; background: none; padding: 7px 10px; border-radius: var(--r-md); font-size: 14.5px; color: var(--body); line-height: 1.4; transition: background-color .3s var(--ease), color .3s var(--ease); }
.toc-item > .i { color: var(--muted); justify-self: center; }
.toc-item:hover { background: var(--surface-card); color: var(--ink); }
.toc-item[aria-current="page"] { background: var(--paper); color: var(--ink); font-weight: 700; box-shadow: inset 3px 0 0 var(--ci), var(--shadow); }
.toc-no { width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center; font-size: 12.5px; font-weight: 800; background: color-mix(in srgb, var(--c) 16%, var(--paper)); color: var(--ci); }
.toc-done { color: var(--success); opacity: 0; }
.toc-item.done .toc-done { opacity: 1; }
.toc-item.done .toc-no { background: var(--success); color: #fff; }
.toc-scrim { display: none; }
.toc-btn, .mnav-title { display: none; }
main { min-width: 0; }
.page[hidden] { display: none !important; }
.page > .section:first-child, .page > .lab:first-child { padding-top: 44px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; width: min(var(--wrap), 100% - 48px); margin: 8px auto 56px; }
.pg { display: flex; align-items: center; gap: 14px; padding: 16px 20px; border-radius: var(--r-xl); border: 1px solid var(--hairline); background: var(--paper); color: var(--ink); text-align: left; font-weight: 700; font-size: 16px; transition: border-color .3s var(--ease), box-shadow .3s var(--ease), translate .3s var(--ease); }
.pg small { display: block; font-size: 12.5px; font-weight: 700; color: var(--muted); margin-bottom: 2px; }
.pg.next { justify-content: flex-end; text-align: right; }
.pg:hover { border-color: var(--primary); box-shadow: var(--shadow-up); translate: 0 -2px; }
.pg .i { font-size: 22px; color: var(--primary-ink); flex: none; }

/* 실습: 왼쪽 따라 하기 고정 */
.lab { padding: 36px 0 20px; }
.lab-head { display: block; padding: 26px 30px 24px; }
.lab-head-top { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.lab-title { font: 600 clamp(24px, 2.6vw, 32px)/1.3 var(--serif); color: var(--ink); }
.lab-head .goal { margin-top: 12px; }
.lab-split { display: grid; grid-template-columns: minmax(300px, 380px) minmax(0, 1fr); gap: 28px; padding: 26px 30px 30px; align-items: start; }
.lab-side { position: sticky; top: calc(var(--head-h) + 16px); display: grid; gap: 14px; max-height: calc(100vh - var(--head-h) - 32px); overflow: auto; padding: 18px; border-radius: var(--r-xl); background: var(--surface-soft); border: 1px solid var(--hairline-soft); scrollbar-width: thin; }
.lab-side .checks label { padding: 8px 6px; font-size: 15.5px; }
.side-out { display: grid; gap: 10px; padding-top: 12px; border-top: 1px dashed var(--hairline); }
.side-out .btn { justify-self: start; }
.lab-main { display: grid; gap: 24px; min-width: 0; }
.shots.two { grid-template-columns: 1fr 1fr; }

/* 예시 작품 갤러리 */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 28px; }
.gcard { display: grid; border: 1px solid var(--hairline); border-radius: var(--r-xl); overflow: hidden; background: var(--paper); text-decoration: none; color: var(--body); transition: box-shadow .45s var(--ease), translate .45s var(--ease), border-color .3s var(--ease); }
.gcard:hover { translate: 0 -5px; box-shadow: var(--shadow-up); border-color: var(--c); }
.gcard img { height: auto; aspect-ratio: 16 / 10; object-fit: cover; object-position: top; width: 100%; border-bottom: 1px solid var(--hairline); }
.gcard .gbody { padding: 18px 20px 20px; display: grid; gap: 6px; }
.gcard h3 { font-size: 19px; }
.gcard p { font-size: 15px; color: var(--muted); }
.gcard .go { font-weight: 800; color: var(--ci); font-size: 15px; display: inline-flex; gap: 6px; align-items: center; margin-top: 4px; }

/* 저작권 */
.site-footer { border-top: 1px solid var(--hairline); background: var(--surface-soft); padding: 44px 0 56px; font-size: 14px; color: var(--body); text-align: left; }
.foot-grid { width: min(var(--wrap), 100% - 48px); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 1.4fr 1.4fr 1.2fr; gap: 32px; align-items: start; }
.foot-brand { display: flex; gap: 12px; align-items: flex-start; }
.foot-brand img { border-radius: 10px; flex: none; }
.foot-brand p { margin: 0; display: grid; gap: 4px; }
.foot-brand b { color: var(--ink); font-size: 15.5px; }
.foot-brand span { color: var(--muted); font-size: 13px; }
.foot-col h2 { font-size: 13px; letter-spacing: .04em; color: var(--muted); font-weight: 700; margin: 0 0 12px; }
.foot-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.foot-col li { line-height: 1.6; padding-left: 14px; position: relative; }
.foot-col li::before { content: ""; position: absolute; left: 0; top: .72em; width: 5px; height: 5px; border-radius: 50%; background: var(--primary); opacity: .7; }
.foot-col a { font-weight: 700; margin-right: 4px; }
@media (max-width: 1080px) { .foot-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .foot-grid { grid-template-columns: 1fr; gap: 26px; } }

@media (max-width: 1080px) {
  .shell { grid-template-columns: 1fr; }
  .toc { position: fixed; z-index: 60; top: 0; left: 0; bottom: 0; height: 100vh; width: min(320px, 86vw); translate: -102% 0; transition: translate .35s var(--ease); box-shadow: var(--shadow-up); }
  body.toc-open .toc { translate: 0 0; }
  body.toc-open .toc-scrim { display: block; position: fixed; inset: 0; z-index: 55; background: rgba(20,18,16,.4); }
  .toc-btn { display: grid; }
  .lab-split { grid-template-columns: 1fr; }
  .lab-side { position: static; max-height: none; }
}
@media (max-width: 760px) {
  .hide-sm { display: none; }
  .brand-sub { display: none; }
  .bar { padding: 0 12px; gap: 8px; }
  .pager { grid-template-columns: 1fr 1fr; width: calc(100% - 24px); }
  .pg { padding: 12px 14px; font-size: 14px; }
  .shots.two, .gallery { grid-template-columns: 1fr; }
  .lab-head, .lab-split { padding-inline: 12px; }
  .lab-side { padding: 12px; }
  .wrap { width: min(var(--wrap), 100% - 20px); }
}


/* ───────── 학교급 탭 · 긴 프롬프트 접기 ───────── */
.vtabs { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 20px 0; }
.vtabs button { border: 1px solid #3b3833; background: transparent; color: var(--on-dark-soft); border-radius: var(--r-pill); padding: 6px 13px; font-size: 13.5px; font-weight: 700; min-height: 34px; transition: background-color .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease); }
.vtabs button:hover { color: var(--on-dark); border-color: #5a554d; }
.vtabs button[aria-pressed="true"] { background: #f0b79f; border-color: #f0b79f; color: #1f1e1b; }
.prompt pre.long { max-height: 26.5em; overflow: hidden; -webkit-mask-image: linear-gradient(#000 80%, transparent); mask-image: linear-gradient(#000 80%, transparent); }
.more-lines { display: block; width: 100%; border: 0; border-top: 1px dashed #3b3833; background: transparent; color: #f0b79f; font-weight: 700; font-size: 14px; padding: 10px 20px; text-align: left; }
.more-lines:hover { background: var(--dark-2); }

/* 책 캡처 출처 */
.credit { display: block; margin-top: 3px; font-size: 12px; color: var(--muted); letter-spacing: .1px; }

/* 갤러리 거르기 · 대상 표시 */
.gfilter { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.gfilter button { border: 1px solid var(--hairline); background: var(--paper); border-radius: var(--r-pill); padding: 7px 15px; font-weight: 700; font-size: 14px; color: var(--body); transition: background-color .3s var(--ease), color .3s var(--ease); }
.gfilter button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--canvas); }
.gcard { position: relative; }
.gcard[hidden] { display: none !important; }
.gtag { position: absolute; top: 12px; left: 12px; z-index: 1; font-size: 12.5px; font-weight: 800; padding: 4px 10px; border-radius: var(--r-pill); background: var(--paper); color: var(--ci); box-shadow: var(--shadow); }

/* 검색 */
.searchbox { position: relative; align-self: center; flex: 1 1 260px; max-width: 380px; margin-left: 12px; }
.searchbox > i { position: absolute; z-index: 1; left: 13px; top: 50%; translate: 0 -50%; color: var(--muted); pointer-events: none; }
.searchbox input { width: 100%; height: 40px; border-radius: var(--r-pill); border: 1px solid var(--hairline); background: var(--paper); padding: 0 14px 0 36px; font-size: 14.5px; color: var(--ink); }
.searchbox input:focus { border-color: var(--primary); outline: 2px solid color-mix(in srgb, var(--primary) 30%, transparent); }
.search-results { position: absolute; top: 46px; left: 0; right: 0; min-width: 320px; background: var(--paper); border: 1px solid var(--hairline); border-radius: var(--r-lg); box-shadow: var(--shadow-up); padding: 6px; display: grid; gap: 2px; max-height: 70vh; overflow: auto; z-index: 70; }
.sr-item { display: grid; gap: 2px; text-align: left; border: 0; background: none; padding: 9px 12px; border-radius: var(--r-md); color: var(--body); }
.sr-item:hover, .sr-item:focus-visible { background: var(--surface-card); }
.sr-item b { color: var(--ink); font-size: 14.5px; }
.sr-item span { font-size: 13px; color: var(--muted); }
.sr-empty { padding: 12px; font-size: 14px; color: var(--muted); }

/* 내 정보 */
.profile-btn .txt { max-width: 220px; overflow: hidden; text-overflow: ellipsis; }
dialog.profile { border: 0; padding: 0; border-radius: 20px; width: min(520px, 100% - 24px); background: var(--paper); color: var(--body); box-shadow: var(--shadow-up); }
dialog.profile::backdrop { background: rgba(20,18,16,.45); }
.profile-in { padding: 26px; display: grid; gap: 14px; }
.profile-in h2 { font-size: 24px; }
.pf-head { display: flex; justify-content: space-between; align-items: center; }
.pf-levels { border: 0; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.pf-levels legend { font-weight: 700; color: var(--ink); font-size: 14.5px; margin-bottom: 8px; padding: 0; }
.pf-chip { position: relative; }
.pf-chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.pf-chip span { display: inline-flex; align-items: center; min-height: 40px; padding: 8px 15px; border-radius: var(--r-pill); border: 1px solid var(--hairline); background: var(--canvas); font-weight: 700; font-size: 14.5px; color: var(--body-strong); transition: background-color .25s var(--ease), border-color .25s var(--ease), color .25s var(--ease); }
.pf-chip:hover span { border-color: var(--primary); }
.pf-chip input:checked + span { background: var(--ink); border-color: var(--ink); color: var(--canvas); }
.pf-chip input:focus-visible + span { outline: 2.5px solid var(--primary); outline-offset: 2px; }
.pf-fields { display: grid; gap: 12px; min-height: 60px; }
.pf-empty { margin: 0; padding: 14px 16px; border-radius: var(--r-lg); background: var(--surface-soft); font-size: 14px; color: var(--body); }
.vt-label { font-size: 12px; font-weight: 700; letter-spacing: .06em; color: var(--on-dark-soft); align-self: center; margin-right: 4px; }
.vtabs button[data-mine]::after { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: currentColor; margin-left: 6px; vertical-align: middle; opacity: .8; }
@media (max-width: 640px) { .vtabs { flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; padding-bottom: 2px; } .vtabs button { flex: none; } }

@media (max-width: 1080px) { .searchbox { max-width: 260px; } }
@media (max-width: 760px) {
  .searchbox { display: none; }
  .profile-btn .txt { display: none; }
}

/* 리빌 + 호버 (한 선언으로 합쳐 맨 뒤에) */
.reveal { opacity: 0; translate: 0 22px; }
.reveal.in { opacity: 1; translate: 0 0; }
.reveal, .first-card, .step, .ccard, .dl-card, .link-card, .safety-grid article, .post, .lab-card, .faq, .contact {
  transition: opacity .6s var(--ease), translate .45s var(--ease), box-shadow .45s var(--ease), border-color .3s var(--ease);
}
.first-card:hover, .dl-card:hover, .link-card:hover, .ccard:hover, .safety-grid article:hover, .post:hover, .step:hover, .contact:hover { translate: 0 -5px; box-shadow: var(--shadow-up); }
.lab-card:hover { box-shadow: var(--shadow-up); }
.faq:hover { box-shadow: var(--shadow); }
.btn:hover, .pbtn:hover { translate: 0 -2px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; translate: none; }
}

/* 반응형 */
@media (max-width: 1080px) {
  .nav { display: none; }
  .tools { margin-left: auto; }
}
@media (max-width: 900px) {
  .hero-grid, .step, .lab-grid, .pair, .compare, .lib-grid, .faq-grid { grid-template-columns: 1fr; }
  .compare > div + div { border-left: 0; border-top: 1px solid var(--hairline); }
  .first-grid, .safety-grid, .trio { grid-template-columns: 1fr; }
  .cards, .cards[data-n] { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .flow-row { grid-template-columns: 34px 1fr; }
  .flow-min, .flow-out { grid-column: 2; }
  .tr-item { grid-template-columns: 1fr; gap: 4px; }
  .section { padding: 60px 0; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .brand-sub { display: none; }
  .progress-pill .txt { display: none; }
  .lab-body, .lab-head, .lab-foot { padding-inline: 18px; }
  .contact { grid-template-columns: 1fr; text-align: center; justify-items: center; }
  .contact .row { justify-content: center; }
  .part-tabs { display: none; }
  .cards, .cards[data-n] { grid-template-columns: 1fr; }
  .hero { padding-top: 32px; }
}
@media print {
  @page { size: A4; margin: 12mm 11mm; }
  :root { --wrap: 100%; }
  body { font-size: 12.5px; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .site-header, .toc, .pager, .vtabs, .more-lines, .gfilter, dialog, #board, .closing, .lightbox, .toast, .prompt-actions, .lab-foot .btn, .hero-actions, .first, .lib-tabs, .faq-filter, .part-flag + .sec-head .eyebrow { display: none !important; }
  .reveal { opacity: 1 !important; translate: none !important; }
  .shell { display: block; }
  .page[hidden] { display: block !important; }
  .lab-split { grid-template-columns: 1fr; }
  .lab-side { position: static; max-height: none; }
  [data-libpanel] { display: grid !important; }
  .section, .lab { padding: 14px 0; }
  .hero { padding: 0 0 10px; }
  .hero-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .step, .ccard, .tr-item, figure, tr, .checks li, .faq, .post { break-inside: avoid; }
  .flow-row { grid-template-columns: 30px 1.6fr 60px 1.4fr; padding: 7px 12px; }
  .flow-min, .flow-out { grid-column: auto; }
  .sec-head { margin-bottom: 16px; }
  .lab-card { box-shadow: none; }
  .lab-grid, .pair { grid-template-columns: 1fr 1fr; gap: 14px; }
  .step { grid-template-columns: 1fr 1fr; padding: 14px; }
  .cards, .cards[data-n] { grid-template-columns: repeat(3, 1fr); }
  .faq-grid, .lib-grid { grid-template-columns: 1fr 1fr; }
  details.faq > .a, details.trouble > .tr-list { display: block !important; }
  h2 { font-size: 22px; }
  .prompt { background: #fbf7f1; border: 1px solid #d9cfc2; }
  .prompt-head, .prompt-note { background: #f5ede3; border-color: #e6dccf; }
  .prompt-head .ptitle, .prompt pre { color: #222; }
  .prompt-note { color: #555; }
  .prompt pre .ph, .prompt pre .lbl { color: #a9583e; background: none; }
  .prompt pre { font-size: 11px; line-height: 1.55; }
  .prompt pre.long { max-height: none; -webkit-mask-image: none; mask-image: none; }
  .shot { max-height: 88mm; width: auto; max-width: 100%; margin: 0 auto; }
  a { text-decoration: none; }
}
.lab-main > *, .lab-split > * { min-width: 0; }
.vprint { display: none; } @media print { .vprint { display: block; margin: 10px 20px 4px; font-weight: 700; font-size: 13px; color: var(--primary-ink); } }
/* 휴대전화: 표는 글자를 짓누르지 않고 표 상자 안에서 옆으로 넘긴다 */
.tbl td:first-child, .tbl th { white-space: nowrap; }
@media (max-width: 640px) { .table-wrap .tbl { min-width: 620px; } .table-wrap { position: relative; } }
.tbl { word-break: keep-all; }
@media (max-width: 640px) { .table-wrap .tbl:has(th:nth-child(3)) { min-width: 700px; } .table-wrap .tbl:has(th:nth-child(4)) { min-width: 820px; } }
@media (max-width: 480px) { .progress-pill { display: none; } .brand-name { font-size: 15.5px; } .brand { gap: 8px; } }
.tbl td b { white-space: nowrap; }
.pv-body, dialog.profile { overscroll-behavior: contain; }
dialog.profile { max-height: 92vh; overflow: auto; }
.board-pager button:not(:disabled):not([aria-current]):hover { border-color: var(--primary); color: var(--ink); }
.board-pager, .pv-count { font-variant-numeric: tabular-nums; }
button, a, summary, label { touch-action: manipulation; }