/* Munjang design system — ported from the ChatGPT Sites concept (2026-09-22): one blue accent, quiet surfaces, 20px cards, 200ms motion.
   Light/dark via prefers-color-scheme, overridable with html[data-theme]. Hangul is set large everywhere a learner reads letter shapes. */
:root{
  --canvas:#f8f9fc;--surface:#ffffff;--surface-soft:#f2f4f8;--surface-hover:#edf1f8;
  --text:#202738;--text-2:#586174;--muted:#647084;--line:#e4e8ef;--line-strong:#c4ccda;
  --accent:#315eeb;--accent-hover:#244cc8;--accent-soft:#edf2ff;--accent-text:#2b51ce;--on-accent:#ffffff;
  --ok:#177245;--ok-soft:#ecf7f0;--warn:#9a6700;--warn-soft:#fff6df;--no:#ba3543;--no-soft:#fff0f1;
  --shadow:0 4px 20px rgb(25 43 75 / 3%);--shadow-raised:0 12px 40px rgb(25 43 75 / 8%);
  --r-sm:8px;--r-md:12px;--r-card:20px;--motion:200ms;
  --font:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Sans","Noto Sans JP",sans-serif;
  --hangul:"Pretendard Variable",Pretendard,"Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  color-scheme:light;
}
@media (prefers-color-scheme:dark){:root:not([data-theme=light]){
  --canvas:#10141d;--surface:#191f2b;--surface-soft:#222a38;--surface-hover:#2b3545;
  --text:#eef2fc;--text-2:#b8c2d4;--muted:#a0acc1;--line:#30394a;--line-strong:#54637b;
  --accent:#8caaff;--accent-hover:#b2c6ff;--accent-soft:#242f50;--accent-text:#a7bdff;--on-accent:#0f1526;
  --ok:#8bd9ac;--ok-soft:#1a352b;--warn:#f2c76b;--warn-soft:#3a2f18;--no:#ffabb4;--no-soft:#3d1f24;
  --shadow:0 4px 20px rgb(0 0 0 / 25%);--shadow-raised:0 12px 40px rgb(0 0 0 / 40%);color-scheme:dark;
}}
:root[data-theme=dark]{
  --canvas:#10141d;--surface:#191f2b;--surface-soft:#222a38;--surface-hover:#2b3545;
  --text:#eef2fc;--text-2:#b8c2d4;--muted:#a0acc1;--line:#30394a;--line-strong:#54637b;
  --accent:#8caaff;--accent-hover:#b2c6ff;--accent-soft:#242f50;--accent-text:#a7bdff;--on-accent:#0f1526;
  --ok:#8bd9ac;--ok-soft:#1a352b;--warn:#f2c76b;--warn-soft:#3a2f18;--no:#ffabb4;--no-soft:#3d1f24;
  --shadow:0 4px 20px rgb(0 0 0 / 25%);--shadow-raised:0 12px 40px rgb(0 0 0 / 40%);color-scheme:dark;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{font-family:var(--font);font-size:16px;line-height:1.55;background:var(--canvas);color:var(--text);-webkit-text-size-adjust:100%}
body{margin:0}
a{color:var(--accent-text);text-decoration:none}a:hover{color:var(--accent-hover)}
:focus-visible{outline:0;box-shadow:0 0 0 3px var(--surface),0 0 0 5px var(--accent);border-radius:6px}
button{font:inherit;color:inherit}
main{max-width:1180px;margin:0 auto;padding:0 24px 64px}
h1,h2,h3{margin:0;letter-spacing:-.01em}
p{margin:.5em 0}
.muted{color:var(--muted)}.small{font-size:.875rem}.hint{color:var(--text-2);font-size:.875rem;margin:0 0 14px}
[lang="ko"],.ko{font-family:var(--hangul)}

/* header */
header.top{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:28px;height:60px;padding:0 24px;background:color-mix(in srgb,var(--canvas) 88%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:1.3rem;font-weight:750;letter-spacing:-.03em;flex:none}
.brand .mark{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:#315eeb;color:#fff;font:700 1.3rem/1 var(--hangul);letter-spacing:0}
.brand .ko{color:var(--muted);font:450 .95rem var(--hangul);margin-left:-2px}
header nav{display:flex;align-items:center;gap:22px;height:100%}
header nav>a,header nav summary{display:flex;align-items:center;height:60px;font-size:.9rem;font-weight:550;color:var(--text-2);position:relative;cursor:pointer;list-style:none;white-space:nowrap}
header nav summary::-webkit-details-marker{display:none}
header nav>a[aria-current],header nav summary[aria-current]{color:var(--text)}
header nav>a[aria-current]::after,header nav summary[aria-current]::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--accent);border-radius:2px}
.menu{position:relative}
.menu-list{position:absolute;top:52px;left:-16px;width:240px;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-raised);z-index:50}
.menu-list a{display:flex;flex-direction:column;padding:9px 12px;border-radius:10px;color:var(--text);font-weight:550;font-size:.9rem}
.menu-list a small{color:var(--muted);font-weight:450;font-family:var(--hangul)}
.menu-list a:hover{background:var(--surface-soft)}
.hdr-right{margin-left:auto;display:flex;align-items:center;gap:14px}
.lang{display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:550;color:var(--muted)}
.lang a{color:var(--muted)}.lang a[aria-current]{color:var(--text)}
.theme{width:34px;height:34px;border:0;border-radius:10px;background:transparent;color:var(--text-2);display:grid;place-items:center;cursor:pointer}
.theme:hover{background:var(--surface-soft)}
@media(max-width:760px){header.top{gap:14px;height:auto;flex-wrap:wrap;padding:10px 16px}header nav{order:3;width:100%;gap:18px;height:40px;overflow-x:auto;scrollbar-width:none}header nav>a,header nav summary{height:40px}header nav>a[aria-current]::after,header nav summary[aria-current]::after{bottom:0}.brand .ko{display:none}.brand{font-size:1.15rem}.brand .mark{width:30px;height:30px;font-size:1.15rem}}
footer{max-width:1180px;margin:0 auto;padding:28px 24px 44px;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line)}
footer b{color:var(--text)}footer a{color:var(--text-2)}

/* hero */
.hero{text-align:center;max-width:780px;margin:0 auto;padding:54px 0 34px}
.eyebrow{color:var(--accent-text);font-size:.85rem;font-weight:600;margin:0 0 14px}
.hero h1{font-size:clamp(2.2rem,5.2vw,3.5rem);line-height:1.08;font-weight:800;letter-spacing:-.035em}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero .lead{color:var(--text-2);font-size:1.05rem;max-width:56ch;margin:18px auto 22px}
.steps{display:flex;justify-content:center;align-items:center;gap:12px;flex-wrap:wrap;list-style:none;margin:0;padding:0;font-size:.8rem;color:var(--text-2);font-weight:550}
.steps li{display:flex;align-items:center;gap:7px}
.steps i{width:20px;height:20px;border-radius:6px;background:var(--surface-soft);border:1px solid var(--line);font:600 .7rem/18px var(--font);font-style:normal;display:grid;place-items:center;color:var(--text-2)}
.steps li:nth-child(2),.steps li:nth-child(4){color:var(--muted)}
@media(max-width:560px){.hero{padding:32px 0 24px}}

/* landing: hero + the letter panel alone, centred; the studio grid opens on the first tap */
.studio{display:grid;grid-template-columns:270px minmax(0,1fr) 300px;gap:18px;align-items:start}
html.landing .studio{display:block;max-width:640px;margin:0 auto}
html.landing .builder,html.landing .side,html.landing .trust,html.landing .intro,html.landing #words,html.landing #rail-foot{display:none}
@media(max-width:1040px){.studio{grid-template-columns:250px minmax(0,1fr)}.side{grid-column:1 / -1;display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start}.side .ad{display:none}}
@media(max-width:760px){.studio{grid-template-columns:minmax(0,1fr)}.side{grid-template-columns:1fr}}

/* panels */
.panel{border:1px solid var(--line);background:var(--surface);border-radius:var(--r-card);box-shadow:var(--shadow);padding:20px;min-width:0}
.panel-title{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.panel-title h2{font-size:1.05rem;font-weight:700;flex:1}
.num{width:26px;height:26px;border:1px solid var(--line);background:var(--surface-soft);border-radius:8px;color:var(--text-2);font-size:.7rem;font-weight:650;display:grid;place-items:center;flex:none}
.link{border:0;background:none;color:var(--accent-text);font-weight:550;font-size:.85rem;cursor:pointer;padding:4px 0}
.link.strong{font-size:.9rem}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border:0;border-radius:var(--r-md);background:var(--accent);color:var(--on-accent);font-weight:650;font-size:.92rem;cursor:pointer;transition:background var(--motion),transform var(--motion)}
.btn:hover{background:var(--accent-hover);color:var(--on-accent)}.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn.ghost{background:var(--surface-soft);color:var(--text)}.btn.ghost:hover{background:var(--surface-hover);color:var(--text)}
.btn.wide{width:100%}
.row{display:flex;gap:8px}.row .btn{flex:1}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:2px 0 12px}
.chip{padding:6px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface);color:var(--text-2);cursor:pointer;font-size:.82rem;font-weight:550;transition:border-color var(--motion),background var(--motion)}
.chip:hover{border-color:var(--line-strong)}.chip.on{border-color:var(--accent);background:var(--accent-soft);color:var(--accent-text)}
.toggle{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-2);cursor:pointer;margin-top:12px}
.toggle input{width:16px;height:16px;accent-color:var(--accent)}
.tag{font-size:.7rem;font-weight:650;padding:2px 8px;border-radius:999px;background:var(--surface-soft);color:var(--text-2);vertical-align:middle}

/* rail: letters + words */
.rail{position:sticky;top:76px}
html.landing .rail{position:static}
@media(max-width:760px){.rail{position:static}}
.jamo-group{margin-bottom:10px}
.jamo-label{font-size:.72rem;font-weight:600;color:var(--muted);margin:0 0 6px;letter-spacing:.04em;text-transform:uppercase}
.jamo-row{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:6px}
html.landing .jamo-row{gap:8px;grid-template-columns:repeat(7,minmax(0,64px));justify-content:space-between}
.jamo{aspect-ratio:1;min-width:0;padding:0;display:grid;place-items:center;border:1px solid var(--line);border-radius:10px;background:var(--surface);font:600 1.25rem/1 var(--hangul);color:var(--text);cursor:pointer;transition:border-color var(--motion),background var(--motion),color var(--motion),transform var(--motion)}
html.landing .jamo{font-size:1.5rem;border-radius:12px}
@media(hover:hover){.jamo:hover{border-color:var(--accent);background:var(--accent-soft)}}
.jamo.on{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}
.jamo:active{transform:scale(.95)}
.words{margin-top:16px}
.words-h{display:flex;align-items:center;justify-content:space-between;font-size:.75rem;font-weight:600;color:var(--muted);margin:0 0 8px;letter-spacing:.04em;text-transform:uppercase}
.words-h b{font-family:var(--hangul);color:var(--text);font-size:.9rem;text-transform:none}
.word-list{display:flex;flex-direction:column;gap:6px}
.word{display:grid;grid-template-columns:1fr auto;align-items:center;gap:2px 10px;padding:10px 12px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-align:left;cursor:pointer;transition:border-color var(--motion),background var(--motion)}
@media(hover:hover){.word:hover{border-color:var(--line-strong);background:var(--surface-soft)}}
.word.on{border-color:var(--accent);background:var(--accent-soft)}
.w-h{grid-column:1;grid-row:1;font:600 1.25rem/1.2 var(--hangul);color:var(--text)}.w-h .hit{color:var(--accent-text)}
.w-m{grid-column:1;font-size:.8rem;color:var(--text-2)}.w-r{grid-column:1;font-size:.72rem;color:var(--muted);display:none}
html.roman .w-r{display:block}
.word .arr{grid-column:2;grid-row:1/4;color:var(--muted);font-size:.9rem}.word.on .arr{color:var(--accent-text)}
.rail-foot{margin:14px 0 0;font-size:.78rem;color:var(--muted)}
@media(max-width:760px){.word-list{display:grid;grid-template-columns:1fr 1fr;gap:8px}.word .arr{display:none}}

/* builder */
.frame-menu{display:flex;flex-direction:column;gap:4px;padding:8px;margin:0 0 14px;border:1px solid var(--line);border-radius:14px;background:var(--surface);box-shadow:var(--shadow-raised)}
.frame-menu button{display:flex;flex-direction:column;align-items:flex-start;padding:8px 10px;border:0;border-radius:10px;background:none;text-align:left;cursor:pointer;font-size:.88rem;font-weight:550;color:var(--text)}
.frame-menu button small{font:450 .8rem var(--hangul);color:var(--muted)}
.frame-menu button:hover{background:var(--surface-soft)}.frame-menu button.on{background:var(--accent-soft);color:var(--accent-text)}
.wordhead{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;padding:14px;border:1px solid var(--line);border-radius:14px;background:var(--surface-soft);margin:8px 0 14px}
.wordhead .syl{width:52px;height:52px;border-radius:12px;background:var(--accent-soft);color:var(--accent-text);display:grid;place-items:center;font:700 1.7rem/1 var(--hangul)}
.wordhead .wh{font:700 1.35rem/1.2 var(--hangul)}.wordhead .wm{font-size:.85rem;color:var(--text-2)}
.wordhead .ws{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}.wordhead .ws i{font:500 .7rem/1 var(--hangul);font-style:normal;padding:4px 6px;border-radius:6px;background:var(--surface);border:1px solid var(--line);color:var(--muted)}
.wordhead .wr{font-size:.75rem;color:var(--muted);display:none}html.roman .wordhead .wr{display:inline}
.say{width:36px;height:36px;border:1px solid var(--line);border-radius:10px;background:var(--surface);cursor:pointer;display:grid;place-items:center;color:var(--text-2)}
.say:hover{border-color:var(--accent);color:var(--accent-text)}
.frame-line{display:flex;align-items:center;gap:8px;font-size:.85rem;color:var(--text-2);margin:0 0 10px}
.frame-line b{color:var(--text);font-weight:600}
.slots{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}
.pair{display:flex;gap:8px;flex:0 0 auto;max-width:100%}
.slot{position:relative;display:flex;flex-direction:column;gap:6px;min-width:0}
.slot-l{font-size:.68rem;font-weight:600;color:var(--muted);letter-spacing:.04em;text-transform:uppercase;white-space:nowrap}
.slot-v{position:relative;min-height:64px;min-width:104px;padding:10px 24px 10px 12px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface);text-align:left;cursor:pointer;display:flex;flex-direction:column;justify-content:center;gap:1px}
.slot-v b{font:600 1.45rem/1.15 var(--hangul);color:var(--text)}.slot-v small{font-size:.72rem;color:var(--muted);white-space:nowrap}
.slot-v::after{content:"";position:absolute;right:8px;bottom:8px;width:6px;height:6px;border-right:1.5px solid var(--muted);border-bottom:1.5px solid var(--muted);transform:rotate(45deg)}
.slot-v:hover{border-color:var(--accent)}
.slot-p .slot-v{min-width:64px;padding:10px 12px;align-items:center;border-style:dashed}
.slot-p .slot-v::after{display:none}
.slot-p.empty .slot-v{border-color:var(--accent);background:var(--accent-soft)}.slot-p.empty .slot-v b{color:var(--accent-text)}
.slot-p.active .slot-v{box-shadow:0 0 0 3px var(--accent-soft)}
.slot-p.ok .slot-v{border-style:solid;border-color:var(--ok)}.slot-p.soft .slot-v{border-style:solid;border-color:var(--warn)}.slot-p.no .slot-v{border-style:solid;border-color:var(--no)}
.picker{position:absolute;left:0;top:calc(100% + 6px);z-index:30;display:flex;flex-direction:column;gap:2px;min-width:230px;max-height:320px;overflow:auto;padding:6px;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow-raised)}
.pk{display:flex;align-items:baseline;gap:10px;padding:9px 12px;border:0;border-radius:10px;background:none;text-align:left;cursor:pointer}
.pk:hover{background:var(--surface-soft)}.pk b{font:600 1.1rem var(--hangul)}.pk small{color:var(--muted);font-size:.82rem}
.ppanel{padding:14px 16px;border:1px solid var(--line);border-radius:14px;background:var(--surface-soft);margin:0 0 12px}
.ppanel .ph{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:4px 8px;margin-bottom:10px;font-size:.88rem;font-weight:650}
.ppanel .ph small{font-weight:500;color:var(--text-2)}
.p-opts{display:flex;gap:8px;flex-wrap:wrap}
.p-opt{min-width:56px;height:52px;padding:0 14px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface);font:600 1.3rem/1 var(--hangul);color:var(--text);cursor:pointer;transition:background var(--motion),border-color var(--motion),transform var(--motion)}
.p-opt:hover{border-color:var(--accent)}.p-opt:active{transform:scale(.96)}
.p-opt.on.ok{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}
.p-opt.on.soft{background:var(--warn-soft);border-color:var(--warn);color:var(--warn)}
.p-opt.on.no{background:var(--no-soft);border-color:var(--no);color:var(--no)}
.ppanel .pn{margin:10px 0 0;font-size:.8rem;color:var(--text-2)}
.whys{display:flex;flex-direction:column;gap:8px;margin:0 0 12px}
.why{padding:11px 14px;border-radius:12px;background:var(--surface-soft);border-left:3px solid var(--line)}
.why b{font:600 1.05rem var(--hangul);margin-right:8px}.why .tag{margin-right:4px}
.why p{margin:4px 0 0;color:var(--text-2);font-size:.88rem}
.why.ok{border-color:var(--ok);background:var(--ok-soft)}.why.ok .tag{background:var(--ok);color:var(--surface)}
.why.soft{border-color:var(--warn);background:var(--warn-soft)}.why.soft .tag{background:var(--warn);color:var(--surface)}
.why.no{border-color:var(--no);background:var(--no-soft)}.why.no .tag{background:var(--no);color:var(--surface)}
.why.info{border-color:var(--accent)}.why.info b{font-family:var(--font);font-size:.88rem}
.preview{padding:18px;border:1px solid var(--line);border-radius:14px;background:var(--surface);margin:0 0 14px;min-height:120px}
.preview .cap{display:flex;align-items:center;gap:6px;font-size:.8rem;color:var(--accent-text);font-weight:600;margin:0 0 8px}
.preview .big{display:flex;flex-wrap:wrap;align-items:flex-end;gap:2px 0;font:700 clamp(1.7rem,3.6vw,2.3rem)/1.25 var(--hangul);margin:0 0 6px;word-break:keep-all}
.preview .ck{display:inline-flex;flex-direction:column;align-items:center}.preview .ck small{font:500 .78rem/1.3 var(--font);color:var(--muted);margin-top:4px}
.preview .ck u{text-decoration:none;color:var(--accent-text);border-bottom:2px solid var(--accent);min-width:1.1em;display:inline-block;text-align:center}
.preview .sp{color:var(--accent);opacity:.7;font-weight:400;margin:0 .12em;align-self:flex-start;line-height:1.25}
.preview .gloss{color:var(--text-2);margin:0 0 12px;font-size:.92rem}
.preview .acts{display:flex;gap:8px;flex-wrap:wrap}
.preview.done{animation:pop .35s cubic-bezier(.16,1,.3,1)}
@keyframes pop{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.free{margin:0 0 6px}.free label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px}
.free-row{display:grid;grid-template-columns:1fr auto;gap:8px}
.free input{padding:11px 12px;border:1px solid var(--line-strong);border-radius:11px;background:var(--surface);font:inherit;color:var(--text);min-width:0}
.free input:focus{border-color:var(--accent);outline:0}
.free small{display:block;margin-top:6px;font-size:.78rem;color:var(--muted)}
.free .btn{padding:0 14px}
.toggle.roman{margin-top:8px}

/* side */
.side{display:flex;flex-direction:column;gap:14px}
.count{font-size:.78rem;font-weight:650;color:var(--muted);background:var(--surface-soft);padding:2px 10px;border-radius:999px}
.tray-list{display:flex;flex-direction:column;gap:6px;margin:6px 0 14px;min-height:120px}
.tray-empty{text-align:center;padding:18px 8px;color:var(--text-2)}
.tray-empty svg{width:64px;height:48px;margin:0 auto 8px;display:block;color:var(--accent)}
.tray-empty b{display:block;color:var(--text);font-size:.92rem}.tray-empty span{font-size:.82rem;color:var(--muted)}
.tray-item{display:grid;grid-template-columns:1fr auto;gap:0 8px;padding:10px 12px;border-radius:12px;background:var(--surface-soft)}
.tray-item b{font:600 1.05rem/1.3 var(--hangul)}.tray-item small{grid-column:1;color:var(--muted);font-size:.78rem}
.tray-item .x{grid-row:1/3;border:0;background:none;color:var(--muted);cursor:pointer;font-size:.95rem;padding:0 2px}
.tray-acts{display:flex;flex-direction:column;gap:8px}
.offer{padding:18px}
.offer .ico{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--accent-soft);margin-bottom:10px;font-size:1rem}
.offer h3{font-size:.98rem;font-weight:700;line-height:1.3;margin-bottom:4px}
.offer p{font-size:.85rem;color:var(--text-2);margin:0 0 10px}
.offer small{display:block;font-size:.72rem;color:var(--muted);margin-top:6px}
.offer.soft{background:var(--surface-soft)}.offer .tag{display:inline-block;margin-bottom:8px}
.ad{min-height:250px;border:1px dashed var(--line);border-radius:14px;display:grid;place-items:center;color:var(--muted);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase}
.ad-wide{min-height:120px;margin-top:16px}
.trust{text-align:center;color:var(--muted);font-size:.85rem;margin:20px 0 0}
.intro{margin-top:40px}

/* prose pages */
.prose{max-width:66ch;margin:0 auto;padding-top:28px}.prose h1{font-size:2rem;font-weight:800;letter-spacing:-.03em;line-height:1.15;margin:0 0 .5em}
.prose h2{font-size:1.25rem;font-weight:700;margin:36px 0 10px}
.prose p,.prose li{color:var(--text-2)}.prose strong,.prose b{color:var(--text)}.prose .lead{font-size:1.08rem}
.prose table{border-collapse:collapse;width:100%;margin:12px 0;font-size:.92rem}.prose th,.prose td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top}.prose th{color:var(--muted);font-weight:600;font-size:.8rem}
.prose td b{color:var(--accent-text)}.prose td[lang=ko],.prose td b{white-space:nowrap}.prose [lang="ko"]{font-weight:600;color:var(--text)}
.prose ol,.prose ul{padding-left:1.2em}.prose li{margin:.4em 0}
.prose a:not(.btn){text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px;text-decoration-color:color-mix(in srgb,currentColor 40%,transparent)}
.quiz{display:flex;flex-direction:column;gap:12px;margin:12px 0 24px}
.qz{padding:14px 16px;border-radius:14px;background:var(--surface);border:1px solid var(--line)}
.qz-s{font:600 1.3rem/1.4 var(--hangul);margin:0 0 10px}.qz-s u{text-decoration:none;color:var(--accent-text);border-bottom:2px solid var(--accent)}
.qz-why{margin:10px 0 0;font-size:.9rem;color:var(--text-2)}.qz-why .tag{margin-right:6px}
.qz-why.ok .tag{background:var(--ok);color:var(--surface)}.qz-why.soft .tag{background:var(--warn);color:var(--surface)}.qz-why.no .tag{background:var(--no);color:var(--surface)}

/* scroll reveal */
.rv{opacity:0;transform:translateY(24px);transition:opacity .6s ease-out var(--d,0s),transform .8s cubic-bezier(.16,1,.3,1) var(--d,0s)}
.reveal.is-in .rv,.reveal.is-in.rv{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}.preview.done{animation:none}}

/* 원고지 print page */
.print-head{max-width:66ch;margin:0 auto;padding-top:28px}
.print-ctl{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:8px 0 20px}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:10px;overflow:hidden}
.seg button{padding:8px 14px;border:0;background:var(--surface);cursor:pointer;font-weight:600;color:var(--muted)}.seg button.on{background:var(--text);color:var(--canvas)}
.print-ctl .toggle{margin:0}
.sheet{--cell:min(4.4vw,34px);margin:0 auto;padding:20px;background:#fff;color:#202738;border:1px solid var(--line);border-radius:12px;max-width:calc(20 * var(--cell) + 42px)}
.sheet-title{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:12px;font-size:.85rem;color:#647084}.sheet-title b{font:700 1rem var(--hangul);color:#202738}
.sent{margin-bottom:18px}.cap{margin:0 0 6px;font-size:.85rem;color:#586174}.cap b{color:#315eeb}.cap [lang="ko"]{font-weight:600;color:#202738}.cap small{color:#8b95a1;margin-left:6px}
.line{display:grid;grid-template-columns:repeat(20,var(--cell));gap:0}
.cell{position:relative;height:var(--cell);border:1px solid #c9cfd6;margin:0 -1px -1px 0;display:flex;align-items:center;justify-content:center;font:500 calc(var(--cell) * .68) var(--hangul);color:#b8c0c9}
.cell.w{color:transparent}.cell.ascii,.topik-sheet .cell:has(> :not(i)){}.cell.punct{font-size:calc(var(--cell) * .5)}
.sheet.notrace .cell.t{color:transparent}
.cell i{position:absolute;right:.05em;bottom:0;font-style:normal;font-size:calc(var(--cell) * .45);color:#b8c0c9}
.sheet.notrace .cell i{color:transparent}
.sheet.guide .cell::before,.sheet.guide .cell::after{content:"";position:absolute;pointer-events:none}
.sheet.guide .cell::before{left:50%;top:0;bottom:0;border-left:1px dashed #e5e8eb}
.sheet.guide .cell::after{top:50%;left:0;right:0;border-top:1px dashed #e5e8eb}
@media print{
  @page{size:A4;margin:14mm}
  header.top,footer,.print-head,.a2hs,.a2hs-sheet,.a2hs-bg{display:none!important}
  html{background:#fff}main{padding:0;max-width:none}
  .sheet{--cell:8.6mm;border:0;padding:0;max-width:none;border-radius:0}
  .sheet.letter{--cell:8.4mm}
  .sent{break-inside:avoid}
}

/* checker */
.checker{max-width:66ch;margin:0 auto 28px}
.checker .free-row{grid-template-columns:1fr auto}
.checker input{padding:13px 14px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface);font:500 1.15rem var(--hangul);color:var(--text);min-width:0}
.checker input:focus{border-color:var(--accent);outline:0}
.chk-out{margin-top:16px}
.chk-chunks{display:flex;flex-wrap:wrap;gap:8px;font:600 1.6rem/1.3 var(--hangul);margin:0 0 6px}
.ck-chunk{position:relative;padding:6px 12px 6px 10px;border-radius:10px;border:1px solid var(--line)}
.ck-chunk i{position:absolute;top:-8px;right:-6px;width:18px;height:18px;border-radius:50%;font:700 .7rem/18px var(--font);font-style:normal;text-align:center;background:var(--line);color:var(--text-2)}
.ck-chunk.ok{border-color:var(--ok)}.ck-chunk.ok i{background:var(--ok);color:var(--surface)}
.ck-chunk.no{border-color:var(--no);background:var(--no-soft)}.ck-chunk.no i{background:var(--no);color:var(--surface)}
.ck-chunk.maybe{border-style:dashed}.ck-chunk.maybe i{background:var(--warn);color:var(--surface)}
.legend{margin:0 0 12px}
.verdict{margin-top:4px}.verdict p{margin:0;color:var(--text)}
.chk-offer{margin-top:14px;border:1px solid var(--line);border-radius:14px}
/* TOPIK */
.topik{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:18px;align-items:start;margin-bottom:28px}
@media(max-width:960px){.topik{grid-template-columns:minmax(0,1fr)}}
.tk-title{font-weight:650;margin:0 0 8px}.tk-title .tag{margin-right:6px}
.tk-text{padding:14px;border-radius:12px;background:var(--surface-soft);font:500 1.05rem/1.8 var(--hangul);white-space:normal;margin-bottom:12px}
.tk-blank{background:var(--accent-soft);color:var(--accent-text);border-radius:6px;padding:0 6px;font-weight:700}
.tk-form{margin-bottom:10px}.tk-form label{display:block;font-size:.85rem;font-weight:600}.tk-form .free-row{margin-top:6px}
.tk-form input{padding:10px 12px;border:1px solid var(--line-strong);border-radius:10px;background:var(--surface);font:500 1.05rem var(--hangul);color:var(--text);min-width:0}
.tk-form .why{margin-top:8px}.tk-form .why p{margin:4px 0 0}
.tk-ctl{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:4px 0 10px}
.tk-ctl select{padding:8px 10px;border:1px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);font:inherit}
.tk-timer{margin-left:auto;display:flex;align-items:center;gap:6px}.tk-timer span{font-variant-numeric:tabular-nums;font-weight:700;min-width:52px}
.tk-prompt-text{font-size:.92rem;color:var(--text-2);padding:10px 12px;border-left:3px solid var(--accent);background:var(--surface-soft);border-radius:0 10px 10px 0;margin:0 0 10px}
#tk-text{width:100%;padding:12px 14px;border:1px solid var(--line-strong);border-radius:12px;background:var(--surface);font:500 1.05rem/1.7 var(--hangul);color:var(--text);resize:vertical}
#tk-text:focus{border-color:var(--accent);outline:0}
.tk-meta{display:flex;align-items:center;gap:10px;margin:8px 0 10px;font-size:.9rem}.tk-meta b{font-size:1rem}
.tag.ok{background:var(--ok);color:var(--surface)}.tag.no{background:var(--no);color:var(--surface)}.tag.warn{background:var(--warn-soft);color:var(--warn)}
.topik-sheet{--cell:min(4.2vw,26px);margin:10px 0 12px;max-width:none}.topik-sheet .cell{color:#202738;font-size:calc(var(--cell) * .62);letter-spacing:-.04em}
.tk-rules-h{font-size:.9rem;margin-top:18px}.tk-rules{padding-left:1.2em;font-size:.85rem;color:var(--text-2)}
@media print{.topik{display:block}#q5152,.tk-ctl,#tk-text,.tk-meta,#tk-notes,.acts,.tk-rules-h,.tk-rules,.tk-prompt-text{display:none!important}.topik-sheet{--cell:8.6mm}}

/* drill */
.drill-btn{display:block;margin-top:6px}
.drill .drill-s{font:600 1.4rem/1.4 var(--hangul);margin:0 0 10px}.drill .drill-s u{text-decoration:none;color:var(--accent-text);border-bottom:2px solid var(--accent);display:inline-block;min-width:1.1em}
.drill .why{margin-top:10px}.drill .why .link{display:block;margin-top:6px}.drill-done{font-weight:700;margin:0 0 10px}
.p-opt.none{font:600 .85rem var(--font);min-width:80px}
.words .more{display:block;margin-top:8px}

/* levels, incompatible pair, flash */
.levels{margin:0 0 10px}
.frame-menu .lvtag{font-size:.65rem;font-weight:700;color:var(--accent-text);background:var(--accent-soft);border-radius:6px;padding:1px 6px;margin-bottom:2px}
.slot.bad .slot-v{border-color:var(--no);background:var(--no-soft)}
.incompat{border-color:var(--no);background:var(--no-soft)}.incompat .ph{color:var(--no)}
.slot.flash .slot-v{animation:ring 1.2s ease-out 2}
@keyframes ring{0%{box-shadow:0 0 0 0 var(--accent)}70%{box-shadow:0 0 0 10px transparent}100%{box-shadow:0 0 0 0 transparent}}
.flash-badge{position:absolute;top:-10px;right:-4px;font-size:.68rem;font-weight:700;color:var(--on-accent);background:var(--accent);padding:2px 8px;border-radius:999px;white-space:nowrap;animation:pop .3s cubic-bezier(.16,1,.3,1)}
@media (prefers-reduced-motion:reduce){.slot.flash .slot-v{animation:none;box-shadow:0 0 0 3px var(--accent)}}
/* worksheet mode */
.cell.blank{border:2px dashed #315eeb;color:transparent;background:#f3f6ff}
.sheet.notrace .cell.blank{background:#f3f6ff}
.ws-hint{margin:0 0 12px;font-size:.85rem;color:#586174}
.answers{margin-top:18px;padding-top:10px;border-top:1px dashed #c4ccda;font-size:.85rem;color:#586174}
.answers b{display:block;margin-bottom:4px;color:#202738}.answers p{margin:2px 0;font-family:var(--hangul)}
.answers.hide{display:none}
.slot-p.empty .slot-v{border:2px dashed var(--accent)}
.preview .ck u{border-bottom:2px dashed var(--accent)}
@media print{.answers{break-before:avoid}}
.sheet.ws .cell.t{color:#202738}
.fm-h{font-size:.72rem;font-weight:700;color:var(--muted);letter-spacing:.04em;text-transform:uppercase;padding:6px 10px 2px}