/* ===========================================================
   기출 101 — site.css (design v2, prompt 049)
   The one stylesheet of the website (copied to /assets/site.css). Benchmark: 내신코치's structure, proportions and
   whitespace; no copied assets. Palette 60-30-10: white/#F7F8FA ground, deep navy for dark blocks and primary
   buttons, a highlighter yellow accent used only as a background behind dark text. Grading red only for answer
   marks. No gradients except the highlighter's hard stop and the notebook ruling; corners 0–4px.
   Font: Pretendard (self-hosted, OFL; /assets/fonts/pretendard/).
   =========================================================== */

:root {
  /* ground (60) */
  --bg:          #FFFFFF;
  --bg-2:        #F7F8FA;
  --tint:        #EEF2F9;     /* hero and preview panels */
  --line:        #E6E8EC;
  --line-2:      #D5DAE3;     /* inactive chips, paper edges */
  --line-3:      #C9CFDA;
  /* text */
  --ink:         #1F2329;
  --ink-2:       #4B515C;
  --muted:       #80858F;
  --faint:       #9AA0AA;     /* inactive tabs, dates (large text or non-essential only) */
  --ink-inv:     #FFFFFF;
  --ink-inv-2:   #C7D0E6;
  /* navy (30) */
  --navy-deep:   #0F1E46;     /* dark blocks, primary buttons, footer band */
  --navy:        #1F3C88;     /* links, active tab, chips, eyebrows */
  --navy-pale:   #E9EEF8;
  --navy-pale-bd:#C5D0E8;
  /* accent (10): highlighter, background only */
  --hl:          #FFE94A;
  --hl-pale:     #FFF8CC;
  /* semantic: grading red, answer marks only */
  --red:         #C8102E;
  /* ruling */
  --rule-40: repeating-linear-gradient(to bottom, transparent 0, transparent 39px, rgba(31, 60, 136, 0.08) 39px, rgba(31, 60, 136, 0.08) 40px);
  --rule-32: repeating-linear-gradient(to bottom, transparent 0, transparent 31px, rgba(31, 60, 136, 0.07) 31px, rgba(31, 60, 136, 0.07) 32px);
  /* fonts */
  --font: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Malgun Gothic', system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Consolas, 'Liberation Mono', monospace;
  --wrap: 1200px;
}

/* =========================================================== base */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: var(--font); letter-spacing: -0.3px;
       -webkit-font-smoothing: antialiased; line-height: 1.6;
       word-break: keep-all; overflow-wrap: break-word; }
a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--navy-deep); text-decoration: underline; }
:focus-visible { outline: 2px solid var(--navy); outline-offset: 2px; }
h1, h2, h3 { letter-spacing: -0.6px; }
img { max-width: 100%; }
.wrap { max-width: var(--wrap); margin: 0 auto; }
.page-body { padding: 28px 24px 72px; }
.hl-mark, mark { background: linear-gradient(transparent 55%, var(--hl) 55%); color: inherit; padding: 0 2px; }
.mono { font-family: var(--font-mono); }

/* =========================================================== notice bar */
.notice { background: var(--bg-2); border-bottom: 1px solid var(--line); }
.notice__in { max-width: 1200px; margin: 0 auto; padding: 0 24px; min-height: 38px; display: flex; align-items: center;
              justify-content: space-between; gap: 16px; font-size: 13px; }
.notice__msg { display: flex; gap: 14px; align-items: center; min-width: 0; }
.notice__label { font-family: var(--font-mono); font-size: 11px; font-weight: 600; color: var(--navy); letter-spacing: 0.6px;
                 font-variant: small-caps; flex-shrink: 0; }
.notice__msg a { color: var(--ink-2); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.notice__links { display: flex; gap: 12px; color: var(--muted); flex-shrink: 0; align-items: center; }
.notice__links a { color: var(--muted); }

/* =========================================================== header */
.hdr { border-bottom: 1px solid var(--line); background: var(--bg); }
.hdr__in { max-width: 1200px; margin: 0 auto; padding: 0 24px; height: 84px; display: flex; align-items: center;
           justify-content: space-between; gap: 24px; }
/* wordmark (052, docs/brand.md): compact SVG, digits' cap height ≈ 28px (37px tall image); 22px on phones */
.brand img { display: block; height: 37px; width: auto; }
.brand { display: inline-flex; align-items: baseline; gap: 6px; color: var(--navy-deep); font-size: 28px; font-weight: 900;
         letter-spacing: -1px; line-height: 1.2; min-height: 44px; align-items: center; }
.brand:hover { color: var(--navy-deep); text-decoration: none; }
.menu { display: flex; gap: 36px; align-items: center; font-size: 17px; font-weight: 700; }
.menu a { color: var(--ink); min-height: 44px; display: inline-flex; align-items: center; }
.menu a[aria-current="page"] { color: var(--navy); box-shadow: inset 0 -3px 0 var(--navy); }
.menu a.menu__find { color: var(--ink-inv); background: var(--navy-deep); padding: 0 18px; font-size: 15px; border-radius: 2px; box-shadow: none; }
.menu a.menu__find:hover { background: var(--navy); text-decoration: none; }
.menu-btn { display: none; }
.subnav { display: none; }

/* =========================================================== footer */
.foot { border-top: 1px solid var(--line); background: var(--bg-2); margin-top: 0; }
.foot__in { max-width: 1200px; margin: 0 auto; padding: 32px 24px 40px; display: flex; justify-content: space-between; gap: 16px;
            flex-wrap: wrap; font-size: 13px; color: var(--muted); }
.foot__col { display: flex; flex-direction: column; gap: 8px; }
.foot__brand { display: inline-flex; align-self: flex-start; min-height: 44px; align-items: center; margin-bottom: 4px; }
.foot__brand img { display: block; height: 46px; width: auto; }   /* the letters 기출 101 ≈ 34px tall */
.page-mark { margin: 6px 0 18px; }
.page-mark img { display: block; height: 64px; width: auto; }
/* the loader behind preview images (052): the image covers it once loaded; with JS it also fades in */
.has-loader { position: relative; color: var(--navy); }
.has-loader > .loader { position: absolute; left: 50%; top: 50%; width: 66px; height: 35px; transform: translate(-50%, -50%); }
.has-loader > img { position: relative; z-index: 1; transition: opacity 0.25s ease; }
.js .has-loader > img:not([data-loaded]) { opacity: 0; }
.row__thumb > .loader { width: 30px; height: 16px; }
@media (prefers-reduced-motion: reduce) { .has-loader > img { transition: none; } }
.foot__links { display: flex; gap: 4px 20px; flex-wrap: wrap; }
.foot__links a { color: var(--ink-2); min-height: 44px; display: inline-flex; align-items: center; }
.foot__links a.foot__privacy { color: var(--ink); font-weight: 700; }

/* =========================================================== buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 44px; font-weight: 700;
       text-decoration: none; border-radius: 2px; box-sizing: border-box; font-family: inherit; }
.btn:hover { text-decoration: none; }
.btn--navy { background: var(--navy-deep); border: 1px solid var(--navy-deep); color: var(--ink-inv); font-size: 16px; height: 56px; padding: 0 26px; }
.btn--navy:hover { background: var(--navy); border-color: var(--navy); color: var(--ink-inv); }
.btn--outline { background: var(--bg); border: 1px solid var(--ink); color: var(--ink); font-size: 16px; height: 56px; padding: 0 26px; }
.btn--outline:hover { background: var(--bg-2); color: var(--ink); }
.btn--sm { height: 50px; font-size: 15px; padding: 0 22px; }
.btn--lg { height: 60px; font-size: 18px; padding: 0 40px; }
.btn__tag { font-family: var(--font-mono); font-size: 11px; background: var(--navy); color: var(--ink-inv); padding: 2px 5px; }
.pill { font-size: 13.5px; border: 1px solid var(--line-3); padding: 0 14px; min-height: 44px; display: inline-flex; align-items: center;
        background: var(--bg); color: var(--navy); border-radius: 2px; font-weight: 600; }
.pill:hover { background: var(--bg-2); text-decoration: none; }

/* =========================================================== home: hero */
.ruled { position: relative; overflow: hidden; }
.ruled::before { content: ""; position: absolute; inset: 0; background-image: var(--rule-40); pointer-events: none; }
.ruled--32::before { background-image: var(--rule-32); }
.ruled > * { position: relative; }
.hero { background: var(--tint); }
.hero__in { max-width: 1200px; margin: 0 auto; padding: 72px 24px 64px; display: flex; gap: 48px; align-items: center; }
.hero__text { flex: 1 1 520px; min-width: 0; display: flex; flex-direction: column; gap: 18px; }
.hero h1 { margin: 0; font-size: 46px; line-height: 1.32; font-weight: 900; letter-spacing: -1.2px; color: var(--navy-deep); }
.hero h1 .hero__sub { display: block; font-weight: 700; color: var(--ink); }
.hero p { margin: 0; font-size: 18px; line-height: 1.7; color: var(--ink-2); max-width: 560px; }
.hero__paper { flex: 0 0 360px; position: relative; height: 430px; }
.paper { background: var(--bg); border: 1px solid var(--line-3); box-shadow: 0 8px 24px rgba(15, 30, 70, 0.12); display: block; }
.paper img { display: block; width: 100%; height: auto; }
.hero__paper .paper--back { position: absolute; left: 40px; top: 22px; width: 280px; height: 396px; transform: rotate(4deg);
                            border-color: var(--line-2); box-shadow: none; }
.hero__paper .paper--front { position: absolute; left: 0; top: 0; width: 290px; }

/* =========================================================== home: highlight band */
.band { background: var(--bg-2); border-bottom: 1px solid var(--line); }
.band__in { max-width: 1200px; margin: 0 auto; padding: 48px 24px; display: flex; gap: 32px; align-items: flex-end; justify-content: space-between; }
.band__main { display: flex; flex-direction: column; gap: 18px; min-width: 0; flex: 1 1 560px; }
.band h2 { margin: 0; font-size: 38px; line-height: 1.35; font-weight: 900; letter-spacing: -1px; color: var(--ink); }
.band h2 mark { padding: 0 4px; }
.chips__label { font-size: 14px; font-weight: 700; color: var(--muted); display: block; margin-bottom: 10px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-book { font-size: 15px; font-weight: 700; color: var(--ink-inv); background: var(--navy); padding: 0 16px; min-height: 44px;
             border-radius: 2px; display: inline-flex; align-items: center; border: 1px solid var(--navy); }
.chip-book:hover { background: var(--navy-deep); color: var(--ink-inv); text-decoration: none; }
.chip-book--soon { color: var(--faint); background: var(--bg); border-color: var(--line-2); font-weight: 500; }
.chip-book--all { background: none; border-color: transparent; color: var(--navy); padding: 0 6px; }
.chip-book--all:hover { background: none; color: var(--navy-deep); text-decoration: underline; }
.band__btns { display: flex; flex-wrap: wrap; flex-shrink: 0; }
.band__btns .btn--outline { border-right: 0; }

/* =========================================================== home: 콘텐츠 소개 (CSS-only tabs) */
.contents { max-width: 1200px; margin: 0 auto; padding: 88px 24px 40px; }
.contents__head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; margin-bottom: 40px; }
.contents__head h2 { margin: 0; font-size: 64px; line-height: 1; font-weight: 900; letter-spacing: -2px; color: var(--ink); }
.tabs { display: flex; gap: 28px; flex-wrap: nowrap; overflow-x: auto; }
.tabs a { font-size: 18px; font-weight: 700; color: var(--faint); border-bottom: 3px solid transparent; padding: 6px 0;
          min-height: 44px; display: inline-flex; align-items: center; white-space: nowrap; }
.tabs a:hover { color: var(--navy); text-decoration: none; }
.tab-panel { display: flex; gap: 56px; align-items: center; scroll-margin-top: 24px; }
.tab-panel + .tab-panel { margin-top: 56px; }
.tab-panel__text { flex: 1 1 380px; min-width: 0; display: flex; flex-direction: column; gap: 16px; }
.tab-panel__no { font-family: var(--font-mono); font-size: 13px; color: var(--muted); }
.tab-panel h3 { margin: 0; font-size: 40px; font-weight: 900; letter-spacing: -1px; color: var(--navy-deep); line-height: 1.25; }
.tab-panel p { margin: 0; font-size: 16px; line-height: 1.75; color: var(--ink-2); }
.tab-panel p.tab-panel__tags { font-size: 15px; font-weight: 700; color: var(--ink); }
.tab-panel .btn { align-self: flex-start; margin-top: 10px; }
.tab-panel__img { flex: 1 1 560px; min-width: 0; background: var(--tint); height: 420px; display: flex; align-items: center; justify-content: center; }
.tab-panel__img .paper { width: 270px; }
.qa { background: var(--bg-2); border-left: 3px solid var(--navy); padding: 14px 18px; font-size: 14.5px; line-height: 1.75; color: var(--ink-2); }
.qa b { color: var(--ink); }
.qa p { margin: 0; font-size: inherit; }
.qa p + p { margin-top: 4px; }
/* one panel at a time where :has() exists; otherwise all four stay stacked and readable */
@supports selector(:has(a)) {
  .contents:not(.js-tabs) .tab-panel { display: none; }
  .contents:not(.js-tabs) .tab-panel + .tab-panel { margin-top: 0; }
  .contents:not(.js-tabs):not(:has(.tab-panel:target)) .contents__head + .tab-panel,
  .contents:not(.js-tabs) .tab-panel:target { display: flex; }
  .contents:not(.js-tabs):not(:has(.tab-panel:target)) .tabs a:first-child,
  .contents:not(.js-tabs):has(#c1:target) .tabs a[href="#c1"], .contents:not(.js-tabs):has(#c2:target) .tabs a[href="#c2"],
  .contents:not(.js-tabs):has(#c3:target) .tabs a[href="#c3"], .contents:not(.js-tabs):has(#c4:target) .tabs a[href="#c4"] {
    color: var(--navy); font-weight: 800; border-bottom-color: var(--navy); }
}
/* with JavaScript (050): the script switches panels without scrolling and keeps aria-selected in sync */
.contents.js-tabs .tab-panel { display: none; }
.contents.js-tabs .tab-panel + .tab-panel { margin-top: 0; }
.contents.js-tabs .tab-panel.is-active { display: flex; }
.contents.js-tabs .tabs a[aria-selected="true"] { color: var(--navy); font-weight: 800; border-bottom-color: var(--navy); }

/* =========================================================== rows: 새로 올라온 자료, /exams/ */
.latest { max-width: 1200px; margin: 0 auto; padding: 56px 24px; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; border-bottom: 2px solid var(--ink); padding-bottom: 14px; gap: 16px; }
.sec-head h2 { margin: 0; font-size: 26px; font-weight: 900; letter-spacing: -0.6px; }
.sec-head a { font-size: 14px; color: var(--muted); min-height: 44px; display: inline-flex; align-items: center; }
.rows { margin: 0; padding: 0; list-style: none; }
.row { display: flex; gap: 20px; align-items: center; padding: 14px 4px; border-bottom: 1px solid var(--line); color: var(--ink); min-height: 44px; }
.row:hover { background: var(--bg-2); text-decoration: none; color: var(--ink); }
.row__thumb { flex: 0 0 52px; height: 68px; background: var(--bg); border: 1px solid var(--line-3); overflow: hidden; }
.row__thumb img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top; }
.row__body { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.row__kind { font-size: 12px; font-weight: 700; color: var(--navy); }
.row__title { font-size: 17px; font-weight: 700; line-height: 1.45; }
.row__meta { font-size: 13px; color: var(--muted); }
.row__date { font-size: 13px; color: var(--muted); white-space: nowrap; }

/* =========================================================== number band */
.numbers { background: var(--navy-deep); color: var(--ink-inv); }
.numbers__in { max-width: 1200px; margin: 0 auto; padding: 44px 24px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px; }
.numbers__item { display: flex; flex-direction: column; gap: 6px; }
.numbers strong { font-size: 40px; font-weight: 900; letter-spacing: -1px; line-height: 1.2; }
.numbers strong small { font-size: 20px; }
.numbers strong .numbers__hl { color: var(--hl); }   /* the only yellow text: on the deep navy band (about 11:1), never on white */
.numbers span.numbers__cap { font-size: 14px; color: var(--ink-inv-2); }

/* =========================================================== ad slots: always labelled 광고 */
.ad-wrap { margin: 40px 0; }
/* 054: with no ad box (ads off) a section directly under the page header still gets its own space */
.page-head + section { margin-top: 30px; }
/* 054: a box is rendered only with a real AdSense unit in it (site.ads_enabled + site.ad_units); the small 광고 label sits
   above the ad, and min-height (only then) avoids layout shift while the ad loads */
.ad-slot { display: block; }
.ad-slot__label { font-size: 12px; color: var(--faint); letter-spacing: 1px; margin-bottom: 6px; }
.ad-slot .adsbygoogle { min-height: 100px; }
.ad-slot--tall .adsbygoogle { min-height: 160px; }
.ad-slot--mid .adsbygoogle { min-height: 120px; }
.home-ad { max-width: 1200px; margin: 0 auto; padding: 40px 24px; }
.home-ad .ad-wrap { margin: 0; }

/* =========================================================== inner pages: header, sections */
.breadcrumb { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.breadcrumb a { color: var(--muted); display: inline-block; padding: 6px 0; }
.breadcrumb .sep { color: var(--line-3); margin: 0 7px; }
.page-head { background: var(--tint); padding: 34px 36px; }
.page-head h1 { margin: 0 0 12px; font-size: 32px; font-weight: 900; letter-spacing: -1px; line-height: 1.32; color: var(--navy-deep); }
.page-head h1 .h1-pre { display: block; font-size: 15px; font-weight: 700; color: var(--navy); letter-spacing: -0.2px; margin-bottom: 4px; }
.page-head p { margin: 0; font-size: 15px; color: var(--ink-2); line-height: 1.75; }
.page-head p + p { margin-top: 6px; }
.page-head .page-head__note { font-size: 13.5px; color: var(--ink-2); background: var(--bg); border-left: 3px solid var(--navy); padding: 8px 12px; margin-top: 14px; }
.page-head--unit { display: flex; gap: 26px; align-items: flex-start; }
.page-head--split { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.page-head--split h1 { margin: 0; }
.eyebrow { font-size: 13px; font-weight: 700; color: var(--navy); letter-spacing: 0.2px; margin-bottom: 8px; }
.unit-badge { background: var(--navy-deep); color: var(--ink-inv); width: 78px; flex-shrink: 0; text-align: center; padding: 10px 0 12px; }
.unit-badge__label { font-size: 10.5px; font-weight: 600; letter-spacing: 0.8px; opacity: 0.85; }
.unit-badge__num { font-size: 38px; font-weight: 900; line-height: 1.05; letter-spacing: -1px; }
.h2-sec { margin: 48px 0 0; font-size: 24px; font-weight: 900; color: var(--ink); border-bottom: 2px solid var(--ink); padding-bottom: 12px; }
.h2-sec--sm { font-size: 21px; }
.h2-sec__num { color: var(--navy); margin-right: 9px; }
.h3-sub { margin: 30px 0 12px; font-size: 18px; font-weight: 800; color: var(--navy-deep); display: flex; align-items: center; gap: 9px; }
.label-sm { font-size: 13.5px; font-weight: 700; color: var(--muted); letter-spacing: 0.2px; margin-bottom: 12px; }
.note-sm { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; margin: 10px 0 0; }
.goal { font-size: 14px; line-height: 1.6; }
.panel { background: var(--bg); border: 1px solid var(--line); }
.panel--pad { padding: 22px 26px; }
.panel--pad-lg { padding: 28px 32px; }
.panel--pad-sm { padding: 16px 18px; }
.prose { font-size: 15.5px; line-height: 1.9; }
.prose h2 { font-size: 19px; margin: 30px 0 8px; color: var(--navy-deep); }
.prose ul, .prose ol { padding-left: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.grid-8 { display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); gap: 7px; }
.gap-11 { gap: 11px; }
.num-badge { background: var(--navy-deep); color: var(--ink-inv); width: 22px; height: 22px; display: inline-flex; align-items: center;
             justify-content: center; font-size: 12.5px; font-weight: 700; flex-shrink: 0; }
.tag-exam { background: var(--navy-deep); color: var(--ink-inv); font-size: 11px; font-weight: 700; padding: 3px 8px; letter-spacing: 0.3px; }
.tag-navy { display: inline-block; background: var(--navy); color: var(--ink-inv); font-size: 11.5px; font-weight: 700; padding: 3px 9px; }

/* cards and file links */
.card-link { background: var(--bg); border: 1px solid var(--line); padding: 16px 18px; display: block; min-height: 44px; color: var(--ink); }
.card-link:hover { background: var(--bg-2); border-color: var(--line-3); text-decoration: none; }
.card-link__kicker { font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.card-link__title { font-size: 15px; font-weight: 700; color: var(--navy); }
.file-link { background: var(--bg); border: 1px solid var(--line); padding: 14px 18px; display: flex; align-items: center;
             justify-content: space-between; gap: 12px; min-height: 44px; color: var(--ink); }
.file-link:hover { background: var(--bg-2); text-decoration: none; }
.file-link__name { font-size: 14.5px; font-weight: 600; color: var(--ink); }
.file-link__meta { font-size: 12px; color: var(--muted); flex-shrink: 0; }
.file-link--solid { background: var(--navy-deep); border-color: var(--navy-deep); }
.file-link--solid:hover { background: var(--navy); }
.file-link--solid .file-link__name { color: var(--ink-inv); font-weight: 700; }
.unit-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 14px; }
.unit-row { background: var(--bg); border: 1px solid var(--line); padding: 8px 16px; display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.unit-row__title { font-size: 15.5px; font-weight: 700; min-height: 44px; display: inline-flex; align-items: center; color: var(--ink); }
.unit-row__links { display: flex; gap: 6px; flex-shrink: 0; }
.unit-row__links a { font-size: 13px; border: 1px solid var(--line-3); padding: 0 12px; min-height: 44px; display: inline-flex; align-items: center; border-radius: 2px; }
.unit-row__links a:hover { background: var(--bg-2); text-decoration: none; }
.soon { font-size: 13px; color: var(--muted); }

/* book cards (/textbook/) */
.book-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.book-card { border: 1px solid var(--line); padding: 20px 22px; display: flex; justify-content: space-between; align-items: center; gap: 16px; background: var(--bg); color: var(--ink); min-height: 44px; }
a.book-card:hover { border-color: var(--navy); text-decoration: none; background: var(--bg-2); }
.book-card__name { font-size: 18px; font-weight: 800; letter-spacing: -0.4px; }
a.book-card .book-card__name { color: var(--navy-deep); }
.book-card__meta { font-size: 13px; color: var(--muted); }
.book-card--soon .book-card__name { color: var(--faint); font-weight: 600; }

/* CTA band */
.cta { background: var(--navy-deep); padding: 30px 34px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.cta__title { font-size: 21px; font-weight: 900; color: var(--ink-inv); letter-spacing: -0.5px; margin-bottom: 8px; }
.cta__note { font-size: 14px; color: var(--ink-inv-2); line-height: 1.7; }
.cta .btn--light { background: var(--bg); color: var(--navy-deep); border: 1px solid var(--bg); height: 56px; padding: 0 26px; font-size: 16px; }
.cta .btn--light:hover { background: var(--hl); border-color: var(--hl); color: var(--navy-deep); }

/* =========================================================== PDF page */
.spec { background: var(--bg); border: 1px solid var(--line); padding: 14px 18px; display: flex; align-items: center; gap: 12px; font-size: 14.5px; }
.types-table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: var(--bg); }
.types-table th, .types-table td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.types-table th { background: var(--bg-2); font-weight: 700; color: var(--ink-2); }
.types-table td.num { text-align: right; white-space: nowrap; }
.preview-panel { background: var(--tint); padding: 40px 32px; margin-top: 12px; }
.preview-panel .grid-3 { gap: 24px; }
.preview-panel figure { margin: 0; }
.thumb-img { display: block; width: 100%; height: auto; }
.thumb__cap { font-size: 12.5px; color: var(--ink-2); text-align: center; margin-top: 10px; }
.dl-panel { text-align: center; margin-top: 26px; border: 1px solid var(--line); padding: 32px 28px; background: var(--bg); }
.dl-file { font-size: 13px; color: var(--muted); margin-top: 14px; overflow-wrap: anywhere; }
.dl-note { font-size: 13px; color: var(--ink-2); margin-top: 8px; line-height: 1.7; }
.answers-band { margin-top: 14px; background: var(--bg-2); border: 1px solid var(--line); padding: 14px 22px; display: flex; align-items: center;
                justify-content: space-between; gap: 20px; flex-wrap: wrap; font-size: 14.5px; }

/* =========================================================== YAML content (same meaning as in the PDF) */
.en, .eg { font-family: var(--font); }
.eg { font-size: 16.5px; color: var(--ink); letter-spacing: 0; }
.ko { font-size: 13.5px; color: var(--ink-2); }
.u { text-decoration: underline; text-underline-offset: 3px; }
.o, .x { color: var(--red); font-weight: 700; }       /* answer marks: grading red */
.arrow { color: var(--navy); font-weight: 700; }
.gray, .tr { color: var(--ink-2); }
s { color: var(--muted); }
.blank { display: inline-block; min-width: 64px; border-bottom: 1.5px solid var(--ink); height: 1em; vertical-align: -2px; }
.blank--w { min-width: 96px; }
.blank--l { min-width: 128px; }
.blank--xl { min-width: 168px; }
.blank--full { display: block; min-width: 0; width: 100%; height: 1.6em; }
.eg .ko, .quiz-item .ko { font-size: 13px; }

/* concept blocks */
.c-p { margin: 12px 0; font-size: 15.5px; line-height: 1.85; }
.c-ex { margin: 10px 0; padding: 12px 18px; background: var(--bg-2); border: 1px solid var(--line); line-height: 1.9; }
.c-item { margin-top: 28px; }
.c-box { margin: 12px 0; padding: 14px 18px; font-size: 15px; line-height: 1.8; }
.c-box h4 { margin: 0 0 6px; font-size: 15px; }
.c-box ol { margin: 6px 0 0; padding-left: 20px; }
.c-box--warn { background: var(--hl-pale); border-left: 4px solid var(--navy-deep); }
.c-box--warn h4 { color: var(--navy-deep); }
.c-box--tip { background: var(--bg); border: 1px solid var(--line); border-left: 4px solid var(--navy); }
.c-box--tip h4 { color: var(--navy); }
.role-table { background: var(--bg); border: 1px solid var(--line); }
.role-row { display: grid; grid-template-columns: 170px 170px minmax(0, 1fr); }
.role-row--3 { grid-template-columns: 150px 150px minmax(0, 1fr); }
.role-row .cell { padding: 16px 17px; }
.role-table .role-row:not(:last-child) { border-bottom: 1px solid var(--line); }
.role-table .role-row--head { background: var(--bg-2); }
.role-table .role-row--head .cell { font-size: 13px; font-weight: 700; padding: 11px 17px; color: var(--ink-2); }
.role-name { font-size: 15px; font-weight: 700; }
.role-mean, .role-ko, .role-note { font-size: 13px; color: var(--ink-2); margin-top: 4px; }
.role-where { font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }
.verb-box { padding: 16px 18px; }
.verb-box--ok { background: var(--navy-pale); border: 1px solid var(--navy-pale-bd); }
.verb-box--both { background: var(--hl-pale); border: 1px solid #EADF94; }
.verb-box--no { background: var(--bg-2); border: 1px solid var(--line-3); }
.verb-box__head { font-size: 13px; font-weight: 700; margin-bottom: 9px; }
.verb-box .en { font-size: 15px; line-height: 1.75; }
.check-list { margin: 0; padding-left: 20px; font-size: 15px; line-height: 1.95; }
.box-note { background: var(--bg); border: 1px solid var(--line); border-left: 4px solid var(--navy); padding: 18px 24px; }
.box-hl { background: var(--hl-pale); border: 1px solid #EADF94; padding: 20px 26px; }
.box-hl__title { font-size: 16px; font-weight: 800; color: var(--navy-deep); margin-bottom: 12px; }
.ins { font-size: 14px; color: var(--ink-2); margin: 8px 0 12px; }
.quiz-grid { background: var(--bg); border: 1px solid var(--line); padding: 20px 26px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px 34px; }
.quiz-item { font-size: 15.5px; border-bottom: 1px dotted var(--line-3); padding-bottom: 9px; }
.quiz-no { font-weight: 700; color: var(--navy); font-size: 13px; margin-right: 7px; }

/* questions */
.q { background: var(--bg); border: 1px solid var(--line); padding: 18px 22px; margin-top: 12px; }
.q__head { display: flex; gap: 10px; align-items: baseline; font-size: 15.5px; font-weight: 700; line-height: 1.6; }
.q__no { color: var(--navy); font-weight: 900; font-size: 18px; flex-shrink: 0; }
.q__lv { font-size: 11px; font-weight: 700; padding: 2px 6px; border: 1px solid var(--navy-pale-bd); color: var(--navy); flex-shrink: 0; }
.q__pts { color: var(--ink-2); font-weight: 700; }
.q__box { margin: 12px 0 0; padding: 12px 16px; border: 1px solid var(--line); background: var(--bg-2); line-height: 1.85; }
.q__box--en { font-size: 15.5px; }
.q__label { font-size: 12px; font-weight: 700; color: var(--navy); margin-bottom: 4px; }
.q__opts { list-style: none; margin: 12px 0 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px 18px; font-size: 15px; }
.q__opts--one { grid-template-columns: minmax(0, 1fr); }
.q__opts--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.q__resp { margin-top: 12px; line-height: 2; font-size: 15px; }
table.q__table { border-collapse: collapse; margin-top: 12px; font-size: 14px; width: 100%; }
table.q__table th, table.q__table td { border: 1px solid var(--line); padding: 7px 10px; text-align: left; }
table.q__table th { background: var(--bg-2); }

/* answers: correct choices and marks in grading red */
.ans { color: var(--red); font-weight: 800; }
.num-chip { border: 1px solid var(--line); padding: 0 4px; min-height: 44px; display: flex; align-items: center; justify-content: center; gap: 4px;
            font-size: 13.5px; color: var(--ink); background: var(--bg); }
.num-chip:hover { background: var(--bg-2); text-decoration: none; }
.num-chip b { color: var(--navy); }
.num-chip--ref { font-size: 12px; color: var(--muted); }
.ans-chip { padding: 8px 4px; text-align: center; font-size: 13px; color: var(--ink); background: var(--bg); border: 1px solid var(--line); }
.ans-chip b { color: var(--navy); margin-right: 2px; }
.ans-chip .ans-chip__a { color: var(--red); font-weight: 700; }
.quick { border: 1px solid var(--line); background: var(--bg-2); padding: 18px 22px; margin-top: 14px; }
.sol-list { background: var(--bg); border: 1px solid var(--line); margin-top: 14px; }
.sol { padding: 18px 24px; border-bottom: 1px solid var(--line); }
.sol:last-child { border-bottom: 0; }
.sol__head { font-size: 16px; font-weight: 800; color: var(--ink); margin-bottom: 8px; display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 8px; }
.sol__head .sol__no { color: var(--navy); }
.sol__head .pts { font-size: 12px; color: var(--muted); font-weight: 600; }
.sol__lesson { font-size: 11.5px; color: var(--navy); font-weight: 700; border: 1px solid var(--navy-pale-bd); padding: 1px 6px; }
.sol__body { margin: 0 0 9px; font-size: 15px; line-height: 1.8; }
.sol__row { display: flex; gap: 9px; align-items: flex-start; }
.sol__row + .sol__row { margin-top: 7px; }
.sol__text { font-size: 14.5px; line-height: 1.7; }
.sol--group { background: var(--bg-2); }
.sol--group .sol__head { color: var(--navy-deep); }
.chip { font-size: 11px; font-weight: 700; padding: 3px 8px; flex-shrink: 0; margin-top: 2px; white-space: nowrap; }
.chip--score { background: var(--navy-pale); color: var(--navy); }
.chip--trans { background: var(--bg-2); color: var(--ink-2); border: 1px solid var(--line); }
.chip--trap { background: var(--hl); color: var(--ink); }
.chip--strat { background: var(--navy-deep); color: var(--ink-inv); }

/* =========================================================== narrow screens */
@media (max-width: 1000px) {
  .menu { gap: 22px; font-size: 16px; }
  .hero__paper { display: none; }
}
@media (max-width: 760px) {
  .notice__in { padding: 0 16px; }
  .notice__msg a { min-height: 44px; display: flex; align-items: center; }   /* tap target; the bar grows to 44px */
  .notice__links { display: none; }
  .breadcrumb { display: flex; flex-wrap: wrap; align-items: center; margin-bottom: 8px; }
  .breadcrumb a, .breadcrumb > span { min-height: 44px; display: inline-flex; align-items: center; padding: 0; }
  .hdr__in { height: 60px; padding: 0 16px; }
  .brand { font-size: 23px; }
  .brand img { height: 29px; }
  .page-mark img { height: 48px; }
  .menu { display: none; }
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border: 1px solid var(--line); color: var(--ink); }
  .menu-btn:hover { text-decoration: none; background: var(--bg-2); }
  .subnav { display: block; border-bottom: 1px solid var(--line); background: var(--bg); }
  .subnav__in { display: flex; gap: 22px; overflow-x: auto; padding: 0 16px; scrollbar-width: none; }
  .subnav__in::-webkit-scrollbar { display: none; }
  .subnav a { flex-shrink: 0; height: 46px; display: inline-flex; align-items: center; font-size: 15px; font-weight: 700; color: var(--ink); white-space: nowrap; }
  .subnav a[aria-current="page"] { color: var(--navy); box-shadow: inset 0 -3px 0 var(--navy); }
  .hero__in { padding: 40px 16px 36px; flex-direction: column; align-items: stretch; gap: 28px; }
  .hero__text, .band__main { flex: none; }   /* 050: a flex-basis became a height in the column layout (the gaps) */
  .hero h1 { font-size: 28px; letter-spacing: -0.8px; }
  .hero p { font-size: 15.5px; }
  .hero__paper { display: block; flex: none; height: auto; }
  .hero__paper .paper--back { display: none; }
  .hero__paper .paper--front { position: static; width: 78%; max-width: 280px; margin: 0 auto; }
  .band__in { padding: 36px 16px; flex-direction: column; align-items: stretch; gap: 20px; }
  .band h2 { font-size: 26px; }
  .chips { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chip-book { padding: 0 12px; font-size: 14.5px; }
  .chip-book--all { grid-column: 1 / -1; }
  .band__btns { flex-direction: column; gap: 8px; }
  .band__btns .btn { width: 100%; height: 54px; }
  .band__btns .btn--outline { border-right: 1px solid var(--ink); }
  .contents { padding: 52px 16px 24px; }
  .contents__head { flex-direction: column; align-items: stretch; gap: 18px; margin-bottom: 26px; }
  .contents__head h2 { font-size: 38px; letter-spacing: -1.2px; }
  .tabs { gap: 20px; }
  .tabs a { font-size: 15.5px; }
  .tab-panel { flex-direction: column-reverse; align-items: stretch; gap: 22px; }
  .tab-panel h3 { font-size: 28px; }
  .tab-panel__img { flex: none; height: 260px; }
  .tab-panel__img .paper { width: 160px; }
  .latest { padding: 36px 16px; }
  .row { gap: 14px; }
  .row__thumb { display: none; }
  .row { flex-wrap: wrap; }
  .row__title { font-size: 15.5px; }
  .row__date { width: 100%; }
  .numbers__in { grid-template-columns: repeat(2, minmax(0, 1fr)); padding: 32px 16px; gap: 22px 16px; }
  .numbers strong { font-size: 30px; }
  .numbers strong small { font-size: 16px; }
  .home-ad { padding: 28px 16px; }
  .ad-slot .adsbygoogle { min-height: 100px; }
  .foot__in { padding: 26px 16px 32px; flex-direction: column; }
  .page-body { padding: 16px 16px 48px; }
  .page-head { padding: 24px 20px; }
  .page-head h1 { font-size: 24px; }
  .page-head--unit { gap: 14px; }
  .unit-badge { width: 62px; }
  .unit-badge__num { font-size: 30px; }
  .panel--pad, .panel--pad-lg { padding: 18px; }
  .grid-2, .grid-3, .book-grid, .unit-list { grid-template-columns: minmax(0, 1fr); }
  .grid-8 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .preview-panel { padding: 24px 18px; }
  .preview-panel .grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
  .cta { flex-direction: column; align-items: stretch; padding: 22px 18px; }
  .btn--lg { width: 100%; padding: 0 20px; font-size: 17px; }
  .unit-row { flex-wrap: wrap; }
  .q { padding: 14px; }
  .q__opts, .q__opts--three { grid-template-columns: minmax(0, 1fr); }
  .role-row, .role-row--3 { grid-template-columns: minmax(0, 1fr); }
  .quiz-grid { grid-template-columns: minmax(0, 1fr); }
  .sol { padding: 14px 16px; }
  .c-ex, .q__box { overflow-wrap: anywhere; }
  .h2-sec { font-size: 21px; }
}