/* 새벽별 수학교실 — Knotive 제작 예시 (가상의 학원). 채점지 컨셉: 모눈종이 · 잉크 · 빨간 펜 · 새벽별 */
/* Saebyeol Sans = Pretendard (OFL-1.1) subset to this page, renamed because "Pretendard" is a Reserved Font Name. Licences: fonts/OFL-*.txt */
@font-face{font-family:"Saebyeol Sans";src:url(../fonts/saebyeolsans-sub.woff2) format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Myeongjo";src:url(../fonts/myeongjo-sub.woff2) format("woff2");font-weight:600 900;font-display:swap}
@font-face{font-family:"Pen";src:url(../fonts/nanumpen-sub.woff2) format("woff2");font-weight:400;font-display:swap}
/* the Myeongjo and Pen subsets have no space glyph: take the space from the (already loaded) sans file instead of a system serif such as Batang */
@font-face{font-family:"Myeongjo";src:url(../fonts/saebyeolsans-sub.woff2) format("woff2");font-weight:600 900;unicode-range:U+20}
@font-face{font-family:"Pen";src:url(../fonts/saebyeolsans-sub.woff2) format("woff2");font-weight:400;unicode-range:U+20}

:root{
  --paper:#F6F2E9; --paper-2:#EDE7DA; --card:#FFFDF8;
  --ink:#1C2140; --ink-2:#3A4062; --muted:#585E7E;
  /* lines are opaque (ink .13 / .26 over paper): forced-dark browsers turn translucent lines near-invisible; --field is the 3:1 outline for inputs and chips */
  --line:#DAD7D3; --line-2:#BDBCBD; --field:#8A8EA6; --grid:rgba(28,33,64,.055); --grid-2:rgba(28,33,64,.09);
  --red:#C4381F; --red-dark:#A12C15; --red-text:#B3321A; --red-tint:#FBECE6;
  --star:#D98E1F; --amber:#EDB45A;
  --mid:#E1E5F3; --mid-bar:#4B5AA6; --high:#F4E2C2; --high-bar:#B87A1E;
  --night:#171B34; --night-2:#20254A; --on-night:#F3EFE6; --on-night-2:#C9CBE0;
  --focus:#2F45C4;
  --serif:"Myeongjo","Nanum Myeongjo","AppleMyungjo","Batang",serif;
  --sans:"Saebyeol Sans","Pretendard",-apple-system,"Apple SD Gothic Neo","Malgun Gothic",sans-serif;
  --pen:"Pen","Nanum Pen Script",cursive;
  --hdr:92px;
  color-scheme:only light;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;overflow-x:clip;scroll-padding-top:calc(var(--hdr) + 12px)}
@media (prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16.5px;line-height:1.65;word-break:keep-all;overflow-wrap:break-word;text-wrap:pretty;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure,blockquote{margin:0}
h2,h3,.cta-scene,.cat-help-h{text-wrap:balance}
ul,ol{padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:3px solid var(--focus);outline-offset:3px;border-radius:4px}
.sr,.sr-m{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.skip{position:absolute;left:12px;top:-60px;z-index:50;background:var(--ink);color:#fff;padding:10px 14px;border-radius:8px;text-decoration:none;font-weight:700}
.skip:focus{top:12px}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.wrap{padding:0 36px}}
@media (min-width:1200px){.wrap{padding:0 40px;max-width:1280px}}

/* ---- example notice + header (both stay on screen) ---- */
.top{position:sticky;top:0;z-index:30}
.fiction{background:var(--ink);color:#ECE8DE;font-size:12.5px;line-height:1.3}
.fiction-in{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:32px}
.fiction p{padding:4px 0;overflow:hidden}
/* the "·" sits in each part's left margin; a part that wraps to a new line starts at the clipped edge, so its "·" is hidden */
.fic{display:flex;flex-wrap:wrap;margin-left:-.8em}
.fic>span{margin-left:.8em}
.fic>span+span::before{content:"·";display:inline-block;width:.8em;margin-left:-.8em;text-align:center}
.fiction a{color:#fff;text-underline-offset:3px;font-weight:600}
.fiction-home{flex:none;display:inline-flex;align-items:center;gap:5px;min-height:44px;margin:-6px 0}
.hdr{background:rgba(246,242,233,.94);border-bottom:1px solid var(--line);-webkit-backdrop-filter:saturate(1.2) blur(10px);backdrop-filter:saturate(1.2) blur(10px)}
.hdr-in{display:flex;align-items:center;gap:20px;min-height:60px}
.brand{display:inline-flex;align-items:center;gap:9px;text-decoration:none;font-family:var(--serif);font-weight:600;font-size:18px;letter-spacing:-.02em;min-height:44px}
.mark{width:28px;height:28px;flex:none;overflow:visible}
.mark-arc,.mark-line{fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.mark-star{fill:var(--star)}
.nav{display:none}
.hdr .btn{margin-left:auto}
/* phone held sideways: notice and header share one row, so the sticky bar is 61px instead of 93px */
@media (orientation:landscape) and (max-height:500px) and (max-width:999px){
  :root{--hdr:61px}
  .top{display:flex}
  .fiction{flex:1 1 0;display:grid;align-items:center}
  .fiction-in{width:100%}
  .hdr{flex:none}
}
@media (min-width:1000px){
  .nav{display:flex;gap:6px;margin-left:auto}
  .nav a{font-size:15px;font-weight:600;color:var(--ink-2);text-decoration:none;padding:10px 12px;border-radius:8px}
  .nav a:hover{background:rgba(28,33,64,.06);color:var(--ink)}
  .hdr .btn{margin-left:8px}
}

/* ---- buttons, chips, small labels ---- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:52px;padding:0 24px;border-radius:10px;border:0;font-weight:700;font-size:16.5px;letter-spacing:-.01em;text-decoration:none;text-align:center;cursor:pointer;transition:background-color .2s,transform .2s}
.btn:active{transform:translateY(1px)}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark)}
.btn-sm{min-height:44px;padding:0 16px;font-size:15px;border-radius:9px}
.btn-block{width:100%}
.link{font-weight:600;color:var(--ink);text-underline-offset:4px;text-decoration-thickness:1px;min-height:44px;display:inline-flex;align-items:center}
.chip{min-height:44px;padding:0 clamp(10px,3.5vw,16px);border-radius:999px;border:1px solid var(--field);background:var(--card);font-size:15px;font-weight:600;white-space:nowrap;cursor:pointer;text-decoration:underline 2px transparent;text-underline-offset:5px;transition:background-color .2s,color .2s,border-color .2s,text-decoration-color 0s}
.chip:hover{border-color:var(--ink)}
/* pressed also gets an ink underline: invisible on the ink fill, but forced dark (Samsung) lightens it, where the dark fill alone barely differs from the card. It appears once the fill has finished darkening. */
.chip[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper);text-decoration-color:var(--ink);transition-delay:0s,0s,0s,.2s}
.ex{display:inline-flex;align-items:center;font-size:12px;font-weight:700;line-height:1;padding:5px 8px;border-radius:6px;background:var(--red-tint);color:var(--red-dark);letter-spacing:0}
.grid-paper{background-color:var(--paper);background-image:linear-gradient(var(--grid-2) 1px,transparent 1px),linear-gradient(90deg,var(--grid-2) 1px,transparent 1px),linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:120px 120px,120px 120px,24px 24px,24px 24px;background-position:-1px -1px}
.sec-alt.grid-paper{background-color:var(--paper-2)}
/* one reassurance line under each button: a small red-pen check, then the line */
.assure{display:flex;align-items:baseline;gap:9px;margin-top:10px;font-size:14px;line-height:1.5;color:var(--ink-2)}
.assure::before{content:"";flex:none;width:10px;height:5px;border-left:2px solid var(--red);border-bottom:2px solid var(--red);transform:translateY(-3px) rotate(-45deg)}

/* ---- photos: thin offset frame + textbook-style caption ---- */
.photo{position:relative}
.photo img{width:100%;height:100%;object-fit:cover;border-radius:4px;background:var(--paper-2);outline:1px solid var(--line-2);outline-offset:7px}
.photo figcaption{margin-top:16px;font-size:13.5px;line-height:1.4;color:var(--muted);font-weight:500}

/* ---- section heads ---- */
.sec{padding:clamp(76px,12vw,136px) 0}
.sec-alt{background:var(--paper-2)}
.unit{display:flex;align-items:center;gap:10px;font-size:14.5px;font-weight:700;color:var(--red-text);letter-spacing:-.01em}
.unit span{display:grid;place-items:center;width:30px;height:30px;border:1.5px solid currentColor;border-radius:50%;font-weight:600;font-size:13.5px;line-height:1}
.unit-plain::before{content:"";width:26px;height:1.5px;background:currentColor}
h2{font-family:var(--serif);font-weight:600;font-size:clamp(29px,7vw,46px);line-height:1.24;letter-spacing:-.03em;margin-top:16px}
.lede{margin-top:16px;max-width:34em;color:var(--ink-2);font-size:clamp(16.5px,1.6vw,18px)}

/* ---- hero: the parent's own words over a marked test sheet ---- */
.hero{padding:26px 0 72px}
.hero-in{display:grid}
.eyebrow{font-size:14px;font-weight:700;color:var(--red-text);letter-spacing:-.01em}
h1{font-family:var(--serif);font-weight:600;font-size:clamp(31px,8.7vw,64px);font-size:clamp(31px,min(8.7vw,10.5svh),64px);line-height:1.3;letter-spacing:-.035em;margin-top:10px}
/* the loop is wider than the words and no taller than the gap between lines, so it rings the glyphs without crossing them or the lines above and below */
.circled{position:relative;white-space:nowrap;display:inline-block;margin-left:.12em}
.pen{position:absolute;left:-9%;top:-8%;width:118%;height:121%;overflow:visible;pointer-events:none}
.pen path{fill:none;stroke:var(--red);stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}
@media (prefers-reduced-motion:no-preference){
  .pen path{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 1.1s cubic-bezier(.6,.1,.3,1) .35s forwards}
  @keyframes draw{to{stroke-dashoffset:0}}
}
.hero .lede{margin-top:16px;max-width:26em}
.facts{margin-top:14px;font-size:14.5px;font-weight:700;color:var(--ink);letter-spacing:-.01em;font-variant-numeric:tabular-nums}
.hero-act{display:flex;flex-wrap:wrap;align-items:center;gap:4px 24px;margin-top:24px}
.hero-act .btn{flex:1 1 100%}
.hero-act .link{flex:1 1 100%;justify-content:center;font-size:15.5px}
.hero .assure{justify-content:center}
.hero-fig{margin-top:44px}
.hero-fig img{aspect-ratio:3/2}
@media (min-width:560px){
  .hero-act .btn{flex:0 0 auto;min-width:220px}
  .hero-act .link{flex:0 0 auto}
  .hero .assure{justify-content:flex-start}
}
@media (min-width:768px){.hero{padding:48px 0 96px}}
@media (min-width:1024px){
  .hero{padding:64px 0 112px}
  .hero-in{grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);column-gap:72px;align-items:center}
  .hero-fig{margin-top:0}
  .hero-fig img{aspect-ratio:1/1;object-position:40% 50%}
}

/* ---- why: the same mistake comes back ---- */
.why-sec{background:var(--paper-2)}
.why-body{display:grid;gap:12px;margin-top:20px;max-width:34em;color:var(--ink-2);font-size:clamp(16.5px,1.6vw,18px)}
.tried-h{margin-top:56px;font-size:17px;font-weight:800;letter-spacing:-.015em}
.tried,.tried thead,.tried tbody{display:block}
.tried{margin-top:14px;background:var(--card);border:1px solid var(--line-2);border-radius:14px;box-shadow:0 24px 48px -36px rgba(28,33,64,.5);overflow:hidden}
.tried thead{display:none}
.tried tr{display:grid;gap:10px;padding:20px 20px 22px;border-top:1px solid var(--line)}
.tried tbody tr:first-child{border-top:0}
.tried th,.tried td{display:block;padding:0;text-align:left;font-weight:inherit}
.tried tbody th b{font-family:var(--serif);font-weight:600;font-size:20px;letter-spacing:-.02em;line-height:1.35}
.tried td{position:relative;padding-left:30px;font-size:15.5px;line-height:1.55}
.tried .ng::before,.tried .okm{content:"";position:absolute;left:1px;top:.22em;width:16px;height:16px}
.tried .ok{color:var(--ink-2)}
/* the ○ is an inline SVG: forced dark (Samsung) lightens SVG strokes like text, but turned the old dark ring border near-invisible */
.tried .okm{fill:none;stroke:var(--ink-2);stroke-width:2}
.tried .ng{color:var(--ink);font-weight:600}
.tried .ng::before{left:8px;top:.05em;width:2.5px;height:21px;border-radius:2px;background:var(--red);transform:rotate(38deg)}
@media (min-width:600px){.tried tr{grid-template-columns:1fr 1fr;column-gap:24px}.tried tbody th{grid-column:1/-1}}
.why-next{margin-top:36px;max-width:28em;font-size:clamp(18px,2.2vw,21px);font-weight:800;line-height:1.5;letter-spacing:-.02em;color:var(--ink)}
@media (min-width:768px){
  .tried{display:table;width:100%;border-collapse:separate;border-spacing:0}
  .tried thead{display:table-header-group}
  .tried tbody{display:table-row-group}
  .tried tr{display:table-row}
  .tried th,.tried td{display:table-cell;vertical-align:top;padding:22px 24px 22px 54px;border-top:1px solid var(--line)}
  .tried thead th{padding:14px 24px 12px 54px;border-top:0;font-size:13.5px;font-weight:700;color:var(--muted);background:rgba(237,231,218,.5)}
  .tried th:first-child{padding-left:28px;padding-right:12px;width:26%;white-space:nowrap}
  .tried tbody tr:first-child th,.tried tbody tr:first-child td{border-top:1px solid var(--line-2)}
  .tried .okm{left:26px;top:calc(22px + .22em)}
  .tried .ng::before{left:33px;top:calc(22px + .05em)}
  .sr-m{display:none}
}
@media (min-width:960px){
  .why-sec .wrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:72px}
  .why-sec .unit,.why-sec h2{grid-column:1}
  .why-body{grid-column:2;grid-row:1/3;align-self:end;margin-top:0}
  .tried-h,.tried,.why-next{grid-column:1/-1}
}

/* ---- method: one lesson, in time order ---- */
.method{display:grid;gap:44px;margin-top:44px}
.timeline li{position:relative;padding:0 0 30px 38px}
.timeline li::before{content:"";position:absolute;left:0;top:7px;width:15px;height:15px;border-radius:50%;background:var(--paper);border:2px solid var(--ink);z-index:1}
.timeline li:not(:last-child)::after{content:"";position:absolute;left:6.5px;top:22px;bottom:-6px;border-left:2px solid var(--line-2)}
.timeline li:last-child{padding-bottom:0}
.timeline li:last-child::before{background:var(--red);border-color:var(--red)}
.when{font-family:var(--pen);font-size:28px;line-height:1;color:var(--red);transform:rotate(-2deg);transform-origin:left center}
.timeline h3{margin-top:8px;font-size:18.5px;font-weight:700;letter-spacing:-.02em;line-height:1.4}
.timeline p:not(.when){margin-top:6px;color:var(--ink-2);font-size:15.5px}
.method-fig img{aspect-ratio:4/3}
@media (min-width:960px){
  .method{grid-template-columns:minmax(0,6fr) minmax(0,5fr);column-gap:80px;align-items:center}
  .method-fig img{aspect-ratio:4/5}
}

.small{display:grid;gap:18px;margin-top:80px;padding-top:40px;border-top:1px solid var(--line-2);align-items:center}
.small-num{font-family:var(--serif);font-weight:600;color:var(--ink);font-size:30px;line-height:1;display:flex;align-items:flex-end;gap:6px}
.small-num span{font-size:clamp(112px,26vw,168px);line-height:.8;color:var(--red);letter-spacing:-.04em}
.small-text h3{font-family:var(--serif);font-weight:600;font-size:clamp(23px,4.4vw,30px);letter-spacing:-.03em;line-height:1.3}
.small-text p{margin-top:12px;color:var(--ink-2);max-width:32em}
@media (min-width:640px){.small{grid-template-columns:auto minmax(0,1fr);column-gap:48px}}

/* ---- review: the shop's own proof ---- */
.look{display:flex;gap:10px;margin-top:40px;font-size:14.5px;font-weight:700;line-height:1.5;color:var(--ink)}
.look::before{content:"";flex:none;width:18px;height:2px;margin-top:.72em;background:var(--red)}
.review{margin-top:16px;background:var(--card);border:1px solid var(--line-2);border-radius:18px;padding:22px 20px 24px;box-shadow:0 30px 60px -40px rgba(28,33,64,.55)}
.review-head{position:relative;display:flex;justify-content:space-between;align-items:flex-start;gap:12px;padding-bottom:18px;border-bottom:3px double var(--line-2)}
.review-k{display:flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;color:var(--ink-2)}
.review-head h3{margin-top:8px;font-family:var(--serif);font-weight:600;font-size:clamp(22px,4vw,28px);letter-spacing:-.03em}
.review-sub{margin-top:4px;font-size:14px;color:var(--muted)}
.pen-note{position:absolute;right:0;top:-6px;font-family:var(--pen);font-size:34px;line-height:1;color:var(--red);transform:rotate(-7deg)}
.review-body{display:grid;gap:28px;margin-top:22px}
/* columns cap at 72px (not the squares), so the grid never ends short of its own squares */
.sheet{display:grid;grid-template-columns:repeat(5,minmax(0,72px));gap:8px;align-content:start}
.sheet li{position:relative;display:grid;place-items:center;aspect-ratio:1;border:1px solid var(--line);border-radius:8px;font-weight:700;font-size:15px;font-variant-numeric:tabular-nums;color:var(--ink);background:var(--paper)}
.sheet li::after{content:"";position:absolute;inset:16%;border:2px solid var(--red);border-radius:48% 52% 46% 54%/52% 46% 54% 48%;opacity:.8;transform:rotate(-8deg)}
.sheet li:nth-child(3n)::after{transform:rotate(14deg);border-radius:52% 48% 55% 45%}
.sheet li.x{background:var(--red-tint)}
.sheet li.x::after{inset:auto 12% 50% 12%;height:2.5px;border:0;border-radius:2px;background:var(--red);transform:rotate(-52deg);opacity:1}
.why{container-type:inline-size}
.why h4,.plan h4{font-size:14px;font-weight:800;color:var(--ink)}
.why dl{margin-top:10px}
.why dl div{display:grid;grid-template-columns:82px 1fr;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--line)}
.why dt{font-size:14.5px;color:var(--ink-2);font-weight:600}
.why dd{display:flex;align-items:center;flex-wrap:wrap;gap:4px 10px;font-weight:700;font-size:15px}
.why dd small{font-weight:500;color:var(--muted);font-size:13px}
.bar{display:inline-block;width:calc(var(--n) * 36px);height:10px;border-radius:2px;background:var(--red)}
/* too narrow for bar + count + question numbers on one line: every row puts the numbers below, so rows stay even */
@container (max-width:300px){.why dd small{flex-basis:100%}}
.plan{margin-top:18px;padding:16px 18px;border-radius:12px;background:var(--paper)}
.plan ul{margin-top:8px}
.plan li{position:relative;padding-left:16px;font-size:15px;color:var(--ink-2)}
.plan li+li{margin-top:4px}
.plan li::before{content:"";position:absolute;left:0;top:.8em;width:7px;border-top:1.5px solid var(--ink-2)}
@media (min-width:640px){.review-body{grid-template-columns:minmax(0,min(392px,46%)) minmax(0,1fr);gap:40px}}
@media (min-width:768px){.review{padding:32px 36px 36px}.review-body{gap:48px}.pen-note{font-size:42px;margin-right:12px}}

.after-review{display:grid;gap:44px;margin-top:56px}
.tell-h{font-family:var(--serif);font-weight:600;font-size:clamp(22px,3.6vw,27px);line-height:1.35;letter-spacing:-.03em}
.tell{margin-top:16px;border-top:2px solid var(--ink)}
.tell li{display:grid;gap:4px;padding:16px 0;border-bottom:1px solid var(--line-2)}
.tell b{font-size:15px;font-weight:800;color:var(--red-text)}
.tell span{color:var(--ink-2);font-size:15.5px}
.scope{margin-top:24px;padding:2px 0 2px 16px;border-left:3px solid var(--ink);font-size:16px;font-weight:700;line-height:1.6;color:var(--ink);max-width:34em}
.cta-card{display:grid;gap:10px;background:var(--card);border:1px solid var(--line-2);border-left:5px solid var(--red);border-radius:6px 16px 16px 6px;padding:26px 20px 22px;box-shadow:0 30px 60px -40px rgba(28,33,64,.55)}
.cta-scene{font-family:var(--serif);font-weight:600;font-size:clamp(21px,5.4vw,27px);line-height:1.4;letter-spacing:-.03em}
.cta-gain{color:var(--ink-2);font-size:15.5px}
.cta-card .btn{margin-top:8px;width:100%}
.cta-card .assure{justify-content:center;margin-top:4px}
@media (min-width:600px){.tell li{grid-template-columns:116px 1fr;gap:16px}.cta-card{padding:30px 30px 26px}}
@media (min-width:960px){.after-review{grid-template-columns:minmax(0,7fr) minmax(0,5fr);column-gap:64px;align-items:center}}

/* ---- classes: grade tabs → class cards → weekly table ---- */
.classes{display:grid;gap:40px;margin-top:36px}
.tabs{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line-2);border-radius:11px;padding:3px;gap:3px;background:var(--card);max-width:520px}
.tabs button{min-height:44px;border:2px solid transparent;border-radius:8px;background:transparent;font-weight:700;font-size:15.5px;cursor:pointer;color:var(--ink-2);transition:background-color .2s,color .2s}
.tabs button:hover{background:rgba(28,33,64,.06)}
.tabs button[aria-selected="true"]{background:var(--ink);border-color:var(--ink);color:var(--paper)}
.tab-note{margin-top:10px;font-size:14px;color:var(--ink-2)}
.panels{margin-top:22px;border-top:2px solid var(--ink)}
.cat-list li{padding:22px 0 14px;border-bottom:1px solid var(--line)}
.cat-name{display:flex;align-items:center;justify-content:space-between;gap:12px}
.cat-name b{font-family:var(--serif);font-weight:600;font-size:22px;letter-spacing:-.025em}
.tag{flex:none;font-size:12.5px;font-weight:700;color:var(--ink-2);border:1px solid var(--line-2);border-radius:999px;padding:3px 10px}
.cat-list p{margin-top:6px;color:var(--ink-2);font-size:15.5px}
.cat-list .cat-meta{display:flex;flex-wrap:wrap;justify-content:space-between;gap:4px 16px;margin-top:12px;font-size:14.5px;font-variant-numeric:tabular-nums;color:var(--ink)}
.cat-meta span:first-child{font-weight:600}
.cat-meta span:last-child{font-weight:800;margin-left:auto}
.cat-go{display:inline-flex;align-items:center;gap:6px;min-height:44px;margin-top:2px;font-size:15px;font-weight:700;color:var(--red-text);text-underline-offset:4px;text-decoration-thickness:1px}
.cat-go::after{content:"";width:7px;height:7px;border-top:2px solid currentColor;border-right:2px solid currentColor;transform:rotate(45deg)}
.cat-note{padding:16px 18px;border:1px dashed var(--line-2);border-radius:12px;font-size:14.5px;color:var(--ink-2);background:rgba(255,253,248,.6)}
.cat-note p+p{margin-top:6px}
.cat-help{margin-top:20px;padding:26px 22px 22px;border-radius:14px;background:var(--ink);color:var(--paper);display:grid;gap:8px}
.cat-help-h{font-family:var(--serif);font-weight:800;font-size:21px;letter-spacing:-.02em}
.cat-help p:not(.cat-help-h){color:var(--on-night-2);font-size:15.5px}
.cat-help .btn{margin-top:10px;width:100%}
.cat-help .assure{justify-content:center;margin-top:2px;font-size:14px}
.cat-help .assure::before{border-color:var(--amber)}
.cat-help :focus-visible{outline-color:var(--amber)}
@media (min-width:960px){
  .classes{grid-template-columns:minmax(0,7fr) minmax(0,5fr);column-gap:64px;align-items:start}
}

.week{margin-top:56px;border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2)}
.week summary{position:relative;display:flex;flex-wrap:wrap;align-items:baseline;gap:2px 14px;min-height:64px;padding:18px 44px 18px 0;cursor:pointer;list-style:none}
.week summary::-webkit-details-marker{display:none}
/* +/− toggle (FAQ too): inline SVG, because forced dark recolours SVG strokes like text but leaves gradients dark */
.pm{position:absolute;right:4px;top:50%;width:16px;height:16px;margin-top:-8px;fill:none;stroke:var(--ink);stroke-width:2;transition:transform .25s}
[open]>summary .pm{transform:rotate(180deg)}
[open]>summary .pm-v{display:none}
.week-t{font-weight:800;font-size:17px;letter-spacing:-.015em}
.week-s{font-size:14px;color:var(--muted)}
.week[open]{padding-bottom:24px}
.tt-box{margin-top:4px;background:var(--card);border:1px solid var(--line-2);border-radius:16px;padding:6px;box-shadow:0 24px 48px -36px rgba(28,33,64,.5)}
.tt{width:100%;table-layout:fixed;border-collapse:separate;border-spacing:3px}
.tt th{font-weight:600}
.tt thead th{font-size:12.5px;color:var(--muted);text-align:left;padding:6px 8px 2px}
.tt thead .tt-day{width:24px}
.tt tbody .tt-day{font-family:var(--serif);font-size:17px;text-align:center;vertical-align:middle;color:var(--ink)}
.tt-sat .tt-day{color:var(--red-text)}
.tt td{padding:0;height:1px;vertical-align:top}
.cls{display:flex;flex-direction:column;justify-content:space-between;gap:6px;height:100%;min-height:66px;padding:7px 4px 6px;border-radius:8px;text-decoration:none;color:var(--ink);border:2px solid transparent;border-left-width:3px;transition:border-color .25s,background-color .2s,transform .2s}
.cls b{font-size:13.5px;line-height:1.3;font-weight:700;letter-spacing:-.02em}
.cls span{font-size:12px;line-height:1.3;color:var(--ink-2);font-variant-numeric:tabular-nums}
.mid{background:var(--mid);border-left-color:var(--mid-bar)}
.high{background:var(--high);border-left-color:var(--high-bar)}
.open{border:1px dashed var(--line-2);color:var(--ink-2)}
a.cls:hover{transform:translateY(-1px)}
a.mid:hover{background:#D5DBF0}
a.high:hover{background:#F0D9AF}
/* the grade picked in the tabs above is ringed in ink (a border: forced dark keeps box-shadows dark but lightens borders) */
.tt[data-show="m1"] a.cls[data-g="m1"],.tt[data-show="m2"] a.cls[data-g="m2"],.tt[data-show="m3"] a.cls[data-g="m3"],.tt[data-show="h1"] a.cls[data-g="h1"],.tt[data-show="h2"] a.cls[data-g="h2"]{border-color:var(--ink)}
.tt-notes{display:flex;flex-wrap:wrap;align-items:center;gap:8px 18px;margin-top:18px;font-size:14px;color:var(--ink-2)}
.tt-notes li{display:inline-flex;align-items:center;gap:7px}
.tt-notes .tt-note-text{flex-basis:100%;display:block;margin-top:4px}
.key{width:14px;height:14px;border-radius:4px}
.key-mid{background:var(--mid);box-shadow:inset 3px 0 var(--mid-bar)}
.key-high{background:var(--high);box-shadow:inset 3px 0 var(--high-bar)}
.key-open{fill:none;stroke:var(--ink-2);stroke-dasharray:3 2} /* inline SVG, so forced dark lightens the dashes like text */
@media (min-width:600px){
  .tt-box{padding:10px}
  .tt{border-spacing:6px}
  .tt thead th{font-size:13.5px;padding:6px 12px 4px}
  .tt thead .tt-day{width:52px}
  .cls{min-height:76px;padding:10px 12px;border-left-width:4px}
  .cls b{font-size:15.5px}
  .cls span{font-size:13.5px}
}
@media (min-width:1024px){.cls{flex-direction:row;align-items:center;min-height:72px}.cls b{font-size:16.5px}.cls span{font-size:14px}}

/* ---- teachers (night → dawn) ---- */
.night{position:relative;overflow:hidden;padding-bottom:clamp(150px,18vw,220px);background-color:var(--night);color:var(--on-night);background-image:
  radial-gradient(1.6px 1.6px at 12% 14%,rgba(255,255,255,.8),transparent),
  radial-gradient(1.2px 1.2px at 28% 32%,rgba(255,255,255,.55),transparent),
  radial-gradient(1.8px 1.8px at 78% 12%,rgba(255,255,255,.85),transparent),
  radial-gradient(1.2px 1.2px at 88% 36%,rgba(255,255,255,.5),transparent),
  radial-gradient(1.4px 1.4px at 61% 22%,rgba(255,255,255,.6),transparent),
  radial-gradient(1.1px 1.1px at 44% 9%,rgba(255,255,255,.5),transparent),
  radial-gradient(2.6px 2.6px at 70% 6%,rgba(237,180,90,.95),transparent)}
.night .unit{color:var(--amber)}
.horizon{position:absolute;left:0;bottom:0;width:100%;height:clamp(100px,12vw,160px)}
.hz{fill:none;stroke:var(--amber);stroke-width:1.5;vector-effect:non-scaling-stroke}
.hz-1{opacity:.6}.hz-2{opacity:.38}.hz-3{opacity:.22}
.hz-line{fill:none;stroke:rgba(243,239,230,.28);stroke-width:1;vector-effect:non-scaling-stroke}
.night .lede{color:var(--on-night-2)}
.teachers{display:grid;gap:20px;margin-top:40px}
.teacher{position:relative;padding:26px 22px 24px;border:1px solid rgba(255,255,255,.16);border-radius:18px;background:rgba(255,255,255,.035)}
.glyph{width:64px;height:64px;overflow:visible}
.glyph .ax{fill:none;stroke:rgba(243,239,230,.45);stroke-width:2.5;stroke-linejoin:round}
.glyph .cv{fill:none;stroke:var(--amber);stroke-width:3.5;stroke-linecap:round}
.glyph .pt{fill:#fff}
.t-role{margin-top:18px;font-size:14px;font-weight:700;color:var(--amber)}
.teacher h3{margin-top:4px;font-family:var(--serif);font-weight:600;font-size:clamp(27px,5.4vw,34px);line-height:1.25;letter-spacing:-.02em;color:#fff}
.teacher blockquote{margin-top:16px;padding-left:16px;border-left:2px solid rgba(237,180,90,.7)}
.teacher blockquote p{font-family:var(--serif);font-weight:600;font-size:clamp(18px,3.9vw,21px);line-height:1.5;letter-spacing:-.03em;color:var(--on-night)}
.t-info{margin-top:22px;border-top:1px solid rgba(255,255,255,.14)}
.t-info div{padding:14px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.t-info dt{font-size:13.5px;font-weight:700;color:var(--on-night-2)}
.t-info dd{margin-top:4px;font-size:15.5px;color:#EDEAF2}
.night :focus-visible{outline-color:var(--amber)}
@media (min-width:860px){.teachers{grid-template-columns:1fr 1fr;gap:28px}.teacher{padding:36px 34px 30px}.teacher:nth-child(2){margin-top:56px}}

/* ---- fit: a textbook "참고" box ---- */
.fit-sec{padding:clamp(64px,9vw,104px) 0 0}
.fit{position:relative;max-width:980px;padding:38px 20px 8px;border:1.5px dashed var(--line-2);border-radius:16px;background:rgba(255,253,248,.6)}
.fit-tag{position:absolute;top:-15px;left:18px;padding:2.5px 10.5px;border:1.5px solid var(--ink);border-radius:6px;background:var(--ink);color:var(--paper);font-size:14px;font-weight:800;line-height:1.5;letter-spacing:.02em}
.fit h2{margin-top:0;font-size:clamp(20px,5.4vw,30px);line-height:1.32}
.fit-list{margin-top:14px}
.fit-list li{display:grid;gap:4px;padding:16px 0;border-top:1px dashed var(--line-2)}
.fit-list b{font-size:16px;font-weight:800;letter-spacing:-.015em}
.fit-list span{font-size:15px;color:var(--ink-2)}
@media (min-width:768px){
  .fit{padding:46px 40px 12px}
  .fit-tag{left:36px}
  .fit-list li{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:28px;padding:18px 0}
}

/* ---- FAQ ---- */
.faq-sec{padding-top:clamp(64px,9vw,104px)}
.faq-wrap{display:grid;gap:36px}
.faq{border-top:2px solid var(--ink)}
.faq details{border-bottom:1px solid var(--line-2)}
.faq summary{position:relative;display:flex;gap:12px;align-items:baseline;min-height:44px;padding:20px 40px 20px 0;font-weight:700;font-size:17px;line-height:1.5;cursor:pointer;list-style:none;letter-spacing:-.015em}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"Q.";flex:none;font-family:var(--serif);font-weight:600;color:var(--red-text)}
.faq details p{padding:0 8px 24px 33px;color:var(--ink-2);font-size:15.5px;line-height:1.75}
@media (min-width:960px){.faq-wrap{grid-template-columns:minmax(0,2fr) minmax(0,3fr);column-gap:72px;align-items:start}.faq-side{position:sticky;top:calc(var(--hdr) + 32px)}}

/* ---- consult ---- */
.consult{display:grid;gap:48px}
.flow{margin-top:32px;counter-reset:f;position:relative}
.flow li{counter-increment:f;position:relative;display:grid;grid-template-columns:40px 1fr;column-gap:14px;padding-bottom:22px}
.flow li::before{content:counter(f);grid-row:1/3;display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--card);border:1.5px solid var(--ink);font-family:var(--serif);font-weight:600;font-size:15px;position:relative;z-index:1}
.flow li:not(:last-child)::after{content:"";position:absolute;left:17px;top:36px;bottom:2px;border-left:1.5px dashed var(--line-2)}
.flow b{font-size:17px;letter-spacing:-.015em;padding-top:4px}
.flow span{font-size:15px;color:var(--ink-2)}
.consult-fig{margin-top:22px}
.consult-fig img{aspect-ratio:3/2}
.form{background:var(--card);border:1px solid var(--line-2);border-radius:18px;padding:22px 18px 24px;box-shadow:0 30px 60px -40px rgba(28,33,64,.55)}
.form-head{display:flex;align-items:center;gap:10px}
.form-head h3{font-family:var(--serif);font-weight:600;font-size:23px;letter-spacing:-.03em}
.form-warn{margin:12px 0 22px;padding:11px 13px;border-radius:9px;background:var(--red-tint);color:#86240F;font-size:14px;font-weight:600;line-height:1.5}
.row2{display:grid;gap:0 14px}
.field{margin:0 0 18px;padding:0;border:0;min-width:0}
.field label,.field legend{display:block;margin-bottom:7px;padding:0;font-size:14.5px;font-weight:700}
.opt{font-weight:500;color:var(--muted)}
.field input,.field select,.field textarea{display:block;width:100%;min-height:50px;padding:0 14px;border:1px solid var(--field);border-radius:10px;background:#fff;font-size:16px;transition:border-color .2s,box-shadow .2s}
.field textarea{padding:12px 14px;min-height:96px;resize:vertical;line-height:1.55}
.field select{appearance:none;-webkit-appearance:none;padding-right:40px;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%231C2140' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat right 15px center}
.field input::placeholder,.field textarea::placeholder{color:#6E7390}
.field input:hover,.field select:hover,.field textarea:hover{border-color:var(--ink-2)}
.field input:focus-visible,.field select:focus-visible,.field textarea:focus-visible{outline:0;border-color:var(--focus);box-shadow:0 0 0 3px rgba(47,69,196,.22)}
.field select.flash{animation:flash 1.4s ease}
@keyframes flash{0%,40%{border-color:var(--red);box-shadow:0 0 0 4px rgba(196,56,31,.2)}}
.times{display:flex;flex-wrap:wrap;gap:8px}
.form-assure{justify-content:center;margin-top:12px}
.form-status{min-height:1.6em;margin-top:10px;font-size:15px;font-weight:700;color:var(--red-text);text-align:center}
@media (min-width:600px){.row2{grid-template-columns:1fr 1fr}.form{padding:30px 30px 32px}}
@media (min-width:1000px){.consult{grid-template-columns:minmax(0,5fr) minmax(0,7fr);column-gap:80px;align-items:start}.form{margin-top:46px}}

/* ---- visit ---- */
.visit{padding-bottom:clamp(84px,12vw,128px)}
.visit-in{display:grid;gap:56px}
.visit-text{order:-1}
.visit-fig img{aspect-ratio:3/2}
.visit-text h2{margin-top:0}
.info{margin-top:22px;border-top:2px solid var(--ink)}
.info div{display:grid;grid-template-columns:84px 1fr;gap:12px;padding:15px 0;border-bottom:1px solid var(--line)}
.info dt{font-size:14.5px;font-weight:700;color:var(--muted)}
.info dd{font-size:16px;font-variant-numeric:tabular-nums}
.info small{display:block;font-size:13px;color:var(--muted)}
@media (min-width:960px){.visit-in{grid-template-columns:minmax(0,1fr) minmax(0,1fr);column-gap:80px;align-items:center}.visit-text{order:0}}

/* ---- footer ---- */
.ftr{background:var(--night);color:var(--on-night-2);padding:48px 0 56px;font-size:14.5px}
.ftr-in{display:grid;gap:14px;max-width:1280px}
.ftr-brand{display:flex;align-items:center;gap:9px;font-family:var(--serif);font-weight:600;font-size:19px;color:var(--on-night)}
.ftr p:not(.ftr-brand){max-width:44em}
.ftr-home{gap:6px;justify-self:start;display:inline-flex;align-items:center;min-height:44px;color:#fff;font-weight:700;text-underline-offset:4px}
.ftr :focus-visible{outline-color:var(--amber)}

@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}