/* Hangul by Hand — layout: 원고지 (Korean manuscript paper) squares carry every name; a red seal marks actions */
:root{
  --paper:#F6F8F5; --sheet:#FFFFFF; --ink:#1A201C; --muted:#5B6A61; --grid:#8DBFA3; --grid-soft:#DCEBE2;
  --seal:#C23B2F; --on-seal:#FFFFFF; --trace:#C9D3CD;
  --display:"Bricolage Grotesque","Avenir Next","Segoe UI",system-ui,sans-serif;
  --body:"Source Sans 3","Segoe UI",system-ui,sans-serif;
  --han:"Gowun Batang","Nanum Myeongjo","AppleMyungjo",serif;
  --han-sans:"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#111614; --sheet:#18201C; --ink:#E7EEE9; --muted:#9DB0A5; --grid:#3E7358; --grid-soft:#22332A;
  --seal:#E0574B; --on-seal:#1A0503; --trace:#3A4841; color-scheme:dark}}
:root[data-theme="dark"]{
  --paper:#111614; --sheet:#18201C; --ink:#E7EEE9; --muted:#9DB0A5; --grid:#3E7358; --grid-soft:#22332A;
  --seal:#E0574B; --on-seal:#1A0503; --trace:#3A4841; color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--paper);color:var(--ink);font-family:var(--body);font-size:18px;line-height:1.6;padding-inline:16px}
a{color:inherit;text-decoration-color:var(--grid);text-underline-offset:3px}
a:hover{text-decoration-color:var(--seal)}
:focus-visible{outline:2px solid var(--seal);outline-offset:3px}
.wrap{max-width:1000px;margin:0 auto}
header.site{display:flex;justify-content:space-between;align-items:center;gap:16px;padding-block:18px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-weight:700;font-size:20px}
.logo .stamp{width:30px;height:30px;border-radius:6px;background:var(--seal);color:var(--on-seal);display:grid;place-items:center;font-family:var(--han);font-size:17px;font-weight:700}
nav.top{display:flex;gap:20px;font-size:16px}
nav.top a{text-decoration:none;color:var(--muted)}
nav.top a:hover{color:var(--ink)}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0;text-wrap:balance}
h1{font-size:clamp(34px,5.4vw,56px);font-weight:700;letter-spacing:-.02em}
h2{font-size:clamp(24px,3vw,32px);font-weight:700;margin-bottom:18px}
p{margin:0 0 14px;max-width:62ch}
.muted{color:var(--muted)}
.eyebrow{font-size:13px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);font-weight:600}
section{padding-block:48px;border-top:1px solid var(--grid-soft)}

/* manuscript squares */
.wongoji{display:flex;flex-wrap:wrap;gap:0;border:2px solid var(--grid);width:max-content;max-width:100%;background:var(--sheet)}
.wongoji span{width:var(--cell,108px);height:var(--cell,108px);display:grid;place-items:center;font-family:var(--han);font-weight:700;font-size:calc(var(--cell,108px)*.66);line-height:1;border-right:1px solid var(--grid);position:relative;background:
  linear-gradient(var(--grid-soft),var(--grid-soft)) center/1px 100% no-repeat,
  linear-gradient(var(--grid-soft),var(--grid-soft)) center/100% 1px no-repeat}
.wongoji span:last-child{border-right:0}
@media (max-width:520px){.wongoji{--cell:78px}}

.hero{padding-block:28px 48px;display:grid;gap:22px}
.meta{display:flex;flex-wrap:wrap;gap:12px 22px;align-items:center;font-size:17px}
.rom{font-family:var(--display);font-size:24px;font-weight:600}
.btn{display:inline-flex;align-items:center;gap:8px;border:0;border-radius:8px;padding:11px 18px;font:600 16px var(--body);cursor:pointer;text-decoration:none}
.btn.seal{background:var(--seal);color:var(--on-seal)}
.btn.line{background:transparent;color:var(--ink);border:1.5px solid var(--grid)}
.btn:hover{filter:brightness(1.05)}

/* converter */
.finder{display:flex;gap:10px;flex-wrap:wrap;max-width:560px}
.finder input{flex:1;min-width:0;font:500 20px var(--body);padding:13px 16px;border:2px solid var(--grid);border-radius:8px;background:var(--sheet);color:var(--ink)}
.result{margin-top:22px;display:grid;gap:14px}
.notfound{background:var(--sheet);border:1px dashed var(--grid);border-radius:8px;padding:16px;max-width:560px}

/* letter by letter */
.blocks{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.block{background:var(--sheet);border:1px solid var(--grid-soft);border-radius:10px;padding:18px;display:grid;gap:10px;align-content:start}
.block .big{font-family:var(--han);font-size:52px;font-weight:700;line-height:1}
.block .r{font-family:var(--display);font-weight:600;color:var(--muted)}
.letter{display:grid;grid-template-columns:44px 1fr;gap:10px;align-items:start;font-size:16px}
.letter b{font-family:var(--han-sans);font-size:26px;font-weight:500;text-align:center;border:1px solid var(--grid-soft);border-radius:6px;line-height:40px}
.letter small{display:block;color:var(--muted);font-size:13px;text-transform:uppercase;letter-spacing:.08em}

.cols{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:6px 18px}
.cols a{display:flex;justify-content:space-between;gap:8px;text-decoration:none;padding:6px 0;border-bottom:1px solid var(--grid-soft);font-size:16px}
.cols a span:last-child{font-family:var(--han-sans);color:var(--muted)}
.cols a:hover span:first-child{color:var(--seal)}
.letters-nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.letters-nav a{width:36px;height:36px;display:grid;place-items:center;border:1px solid var(--grid-soft);border-radius:6px;text-decoration:none;font-weight:600}
.note{background:var(--sheet);border-left:3px solid var(--seal);padding:14px 18px;border-radius:0 8px 8px 0;max-width:680px}
.ad{min-height:0}
footer.site{padding-block:36px 56px;border-top:1px solid var(--grid-soft);font-size:15px;color:var(--muted);display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between}
footer.site a{color:var(--muted)}

/* practice sheet */
.sheet{background:var(--sheet);border:1px solid var(--grid-soft);padding:24px;display:grid;gap:14px;max-width:820px}
.sheet .row{display:flex;border:1.5px solid var(--grid);width:max-content;max-width:100%}
.sheet .row span{width:64px;height:64px;display:grid;place-items:center;font-family:var(--han-sans);font-size:44px;border-right:1px solid var(--grid);background:
  linear-gradient(var(--grid-soft),var(--grid-soft)) center/1px 100% no-repeat,
  linear-gradient(var(--grid-soft),var(--grid-soft)) center/100% 1px no-repeat}
.sheet .row span:last-child{border-right:0}
.sheet .model{color:var(--ink)}
.sheet .trace{color:var(--trace)}
@media print{
  body{background:#fff;color:#000;padding:0}
  header.site,footer.site,.noprint,.ad{display:none!important}
  .sheet{border:0;padding:0}
  .sheet .row{border-color:#7fb59a}
  .sheet .trace{color:#c8d0cb}
}
@media (prefers-reduced-motion:no-preference){.wongoji span{animation:ink .5s ease-out both}.wongoji span:nth-child(2){animation-delay:.12s}.wongoji span:nth-child(3){animation-delay:.24s}.wongoji span:nth-child(4){animation-delay:.36s}@keyframes ink{from{color:transparent}to{}}}
@media (max-width:640px){.sheet{padding:14px}.sheet .row span{width:36px;height:36px;font-size:25px}}