/* 손빛 배움터 — Stitch 디자인(네이비·틸·앰버)을 바탕으로 한 자체 CSS. 외부 CDN(폰트·아이콘) 없이 이 PC/보통 PC에 있는 글꼴만 사용 — 글자가 안 보이는 문제를 원천 차단. */
:root{
  --navy:#0d1240; --navy2:#1e1b4b; --ink:#131b2e; --muted:#5b6474; --line:#e3e6ef;
  --teal:#006a61; --teal-d:#004f49; --mint:#bdf4ea; --mint-ink:#00564f;
  --amber:#b45f06; --amber-bg:#ffe9cf;
  --surface:#faf8ff; --surface2:#f2f3ff; --card:#ffffff; --danger:#ba1a1a;
  --navline: rgba(13,18,64,.18);
  --r-lg:22px; --r-md:16px; --r-sm:12px;
  --shadow:0 2px 14px rgba(19,27,46,.07);
}
:root[data-theme="dark"]{
  --navy:#c4c1fb; --navy2:#e3dfff; --ink:#eef0ff; --muted:#aab0c8; --line:#2b3150;
  --teal:#6bd8cb; --teal-d:#89f5e7; --mint:#0f3a35; --mint-ink:#89f5e7;
  --amber:#ffb77d; --amber-bg:#3a2409;
  --surface:#0a0e24; --surface2:#131a35; --card:#121a38;
  --navline: rgba(255,255,255,.22);
  --shadow:0 2px 20px rgba(0,0,0,.45);
}
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]){
  --navy:#c4c1fb; --navy2:#e3dfff; --ink:#eef0ff; --muted:#aab0c8; --line:#2b3150;
  --teal:#6bd8cb; --teal-d:#89f5e7; --mint:#0f3a35; --mint-ink:#89f5e7;
  --amber:#ffb77d; --amber-bg:#3a2409;
  --surface:#0a0e24; --surface2:#131a35; --card:#121a38;
  --navline: rgba(255,255,255,.22);
}}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:"Noto Sans KR","Malgun Gothic","Apple SD Gothic Neo",system-ui,sans-serif;
  background:var(--surface); color:var(--ink);
  -webkit-font-smoothing:antialiased;
}
html.big-text{ font-size:125%; }
button{font:inherit;color:inherit}
a{color:inherit}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.app{max-width:480px;margin:0 auto;min-height:100vh;background:var(--surface);display:flex;flex-direction:column;position:relative;box-shadow:0 0 60px rgba(13,18,64,.08)}
@media (min-width:540px){ .app{min-height:100dvh} }
/* 컴퓨터(넓은 화면)에서는 가운데 좁은 띠로만 보이지 않게, 화면 너비에 맞춰 단계적으로 넓어지게 */
@media (min-width:760px){ .app{max-width:680px} }
@media (min-width:1000px){ .app{max-width:900px; box-shadow:0 0 90px rgba(13,18,64,.12)} }
@media (min-width:1280px){ .app{max-width:1100px} }
@media (min-width:760px){ main{padding-left:28px; padding-right:28px} }

/* 상단 바 */
.topbar{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:14px 16px;background:color-mix(in srgb, var(--surface) 86%, transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;min-width:0}
.brand .logo{width:38px;height:38px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;flex:none}
:root[data-theme="dark"] .brand .logo{color:var(--navy2);background:#1b2350}
.brand .tt{display:flex;flex-direction:column;min-width:0;line-height:1.2}
.brand .k{font-size:0.6875rem;font-weight:700;letter-spacing:.04em;color:var(--teal);text-transform:uppercase}
.brand .t{font-size:1.0625rem;font-weight:800;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-actions{display:flex;gap:4px;flex:none}
.icon-btn{width:40px;height:40px;border:0;border-radius:999px;background:transparent;color:var(--muted);display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{background:var(--surface2);color:var(--ink)}
.icon-btn[aria-pressed="true"]{color:var(--teal);background:var(--mint)}
.icon-btn:focus-visible,.navbtn:focus-visible,.btn:focus-visible,button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--amber);outline-offset:2px}

main{flex:1;padding:16px 16px calc(96px + env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:18px}
.view{display:none;flex-direction:column;gap:18px;animation:fadein .25s ease}
.view.active{display:flex}
@keyframes fadein{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

h1,h2,h3{margin:0;color:var(--ink);letter-spacing:-.01em}
.section-h{display:flex;align-items:baseline;justify-content:space-between;gap:8px}
.section-h h2{font-size:1.1875rem;font-weight:800}
.section-h .more{font-size:0.8125rem;font-weight:700;color:var(--teal);background:none;border:0;cursor:pointer}
p{margin:0;line-height:1.5}

/* 카드 공통 */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px;box-shadow:var(--shadow)}
.hero{background:linear-gradient(135deg,var(--navy) 0%,#262a66 100%);color:#fff;border-radius:var(--r-lg);padding:22px 20px;position:relative;overflow:hidden}
:root[data-theme="dark"] .hero{background:linear-gradient(135deg,#171c40 0%,#232a5c 100%)}
.hero::before{content:"";position:absolute;right:-50px;top:-50px;width:180px;height:180px;border-radius:50%;background:radial-gradient(circle,rgba(107,216,203,.35),transparent 70%)}
.hero h2{color:#fff;font-size:1.375rem;font-weight:800;position:relative}
.hero p{color:#d7daf5;margin-top:6px;position:relative}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px;position:relative}
.stat{background:rgba(255,255,255,.1);border-radius:14px;padding:12px 10px;text-align:center}
.stat b{display:block;font-size:1.25rem;font-weight:800}
.stat span{font-size:0.7188rem;color:#c7cbef}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* 영상 카드 */
.vcard{display:block;border-radius:var(--r-md);overflow:hidden;background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);cursor:pointer;text-align:left;padding:0;width:100%}
.vcard .thumb{position:relative;aspect-ratio:16/9;background:var(--navy);overflow:hidden}
.vcard .thumb img{width:100%;height:100%;object-fit:cover;display:block}
.vcard .play{position:absolute;inset:0;display:grid;place-items:center;background:linear-gradient(0deg,rgba(0,0,0,.35),transparent 50%)}
.vcard .play svg{width:46px;height:46px;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4))}
.vcard .dur{position:absolute;right:8px;bottom:8px;background:rgba(0,0,0,.72);color:#fff;font-size:0.6875rem;font-weight:700;padding:2px 7px;border-radius:7px}
.vcard .body{padding:12px 14px 14px}
.vcard .tags{display:flex;gap:6px;margin-bottom:6px}
.tag{font-size:0.6875rem;font-weight:800;padding:3px 9px;border-radius:999px;background:var(--mint);color:var(--mint-ink)}
.tag.amber{background:var(--amber-bg);color:var(--amber)}
.vcard h3{font-size:0.9375rem;font-weight:800;line-height:1.35}
.vcard .watched{display:inline-flex;align-items:center;gap:4px;font-size:0.7188rem;color:var(--teal);font-weight:700;margin-top:6px}
.vlist-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media (min-width:420px){ .vlist-grid{grid-template-columns:1fr 1fr} }
@media (min-width:1000px){ .vlist-grid{grid-template-columns:repeat(3,1fr)} }

/* 로드맵 */
.roadtabs{display:flex;gap:8px}
.chip{border:1px solid var(--line);background:var(--card);border-radius:999px;padding:9px 16px;font-weight:700;font-size:0.8438rem;cursor:pointer;color:var(--muted)}
.chip.active{background:var(--navy);color:#fff;border-color:var(--navy)}
:root[data-theme="dark"] .chip.active{background:var(--navy2);color:var(--navy)}
.road{display:flex;flex-direction:column;position:relative;padding-left:26px}
.road::before{content:"";position:absolute;left:11px;top:6px;bottom:6px;width:2px;background:var(--line)}
.rstep{position:relative;padding:12px 0}
.rstep .dot{position:absolute;left:-26px;top:16px;width:24px;height:24px;border-radius:50%;background:var(--card);border:2px solid var(--line);display:grid;place-items:center}
.rstep.done .dot{background:var(--teal);border-color:var(--teal);color:#fff}
.rstep.now .dot{background:var(--amber);border-color:var(--amber);color:#fff}
.rbox{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:14px;display:flex;justify-content:space-between;align-items:center;gap:10px;cursor:pointer}
.rstep.now .rbox{border-color:var(--amber)}
.rbox .tt{font-weight:800;font-size:0.9063rem}
.rbox .sub{font-size:0.7813rem;color:var(--muted);margin-top:2px}

/* 버튼 */
.btn{border:0;border-radius:14px;padding:13px 18px;font-weight:800;font-size:0.9063rem;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px}
.btn.primary{background:var(--teal);color:#fff}
.btn.ghost{background:var(--surface2);color:var(--ink)}
.btn.block{width:100%}
.btn[disabled]{opacity:.45;cursor:default}

/* 검색·칩 필터 */
.search{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:11px 14px}
.search input{border:0;outline:0;background:none;flex:1;font-size:0.9375rem;color:var(--ink)}
.chiprow{display:flex;gap:8px;overflow-x:auto;padding-bottom:2px;-webkit-overflow-scrolling:touch}
.chiprow::-webkit-scrollbar{display:none}
.chiprow .chip{flex:none}

/* 수어 사전: 주제 카드 → 단어 목록(펼치기) */
[hidden]{display:none!important}
.topicgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
@media (min-width:760px){ .topicgrid{grid-template-columns:repeat(3,1fr)} }
.topiccard{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);padding:14px;cursor:pointer;box-shadow:var(--shadow);color:var(--ink)}
.topiccard .ti{font-size:1.625rem;line-height:1}
.topiccard .tn{font-size:0.9375rem;font-weight:800;margin-top:4px}
.topiccard .tc{font-size:0.75rem;color:var(--muted)}
.topiccard.urgent{grid-column:1/-1;flex-direction:row;align-items:center;gap:12px;background:var(--amber-bg);border-color:var(--amber)}
.topiccard.urgent .tn{margin-top:0;flex:1}
.topichead{display:flex;align-items:center;gap:10px}
.topichead h2{font-size:1.125rem}
.wordlist{display:flex;flex-direction:column;gap:8px}
.wordrow{background:var(--card);border:1px solid var(--line);border-radius:var(--r-md)}
.wordrow summary{list-style:none;cursor:pointer;display:flex;align-items:center;gap:10px;padding:14px;font-weight:800;font-size:1rem}
.wordrow summary::-webkit-details-marker{display:none}
.wordrow summary::after{content:'›';margin-left:auto;color:var(--muted);font-size:1.25rem;transition:transform .15s}
.wordrow[open] summary::after{transform:rotate(90deg)}
.wordrow .wtopic{font-size:0.7188rem;font-weight:600;color:var(--muted)}
.wordrow .vbadge{font-size:0.625rem;color:var(--teal);background:var(--mint);border-radius:999px;padding:2px 7px}
.wordrow .wbody{padding:0 14px 14px;display:flex;flex-direction:column;gap:8px}
.wordrow .desc{font-size:0.8438rem;color:var(--muted);line-height:1.55}
.wordrow .actions{display:flex;gap:8px;margin-top:2px;flex-wrap:wrap}
.cardimg{margin-top:4px;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff}
.cardimg .note{margin:0;padding:6px 10px;background:var(--surface2);color:var(--muted);font-size:0.7188rem}
.linkbtn{font-size:0.7813rem;font-weight:800;color:var(--teal);background:var(--mint);border:0;border-radius:10px;padding:8px 12px;cursor:pointer;display:inline-flex;align-items:center;gap:5px}
.linkbtn.alt{background:var(--surface2);color:var(--ink)}
.linkbtn.primary{background:var(--amber-bg);color:var(--amber)}
.realvideo{margin-top:4px;border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#000}
.realvideo .note{margin:0;padding:6px 10px;background:var(--surface2);color:var(--muted);font-size:0.7188rem}
.sldict-crop{position:relative;overflow:hidden;margin:0 auto}
.sldict-crop iframe{position:absolute;border:0;width:1200px;height:1400px}
.sldict-crop-video{width:100%;max-width:340px;height:300px}
.sldict-crop-video iframe{left:-328px;top:-292px}
.sldict-crop-shape{width:100%;max-width:320px;height:270px;background:#fff}
.sldict-crop-shape iframe{left:-670px;top:-275px}
.empty{text-align:center;color:var(--muted);padding:40px 10px;font-size:0.875rem}

/* 점자 패드 */
.braillecell-wrap{display:flex;flex-direction:column;align-items:center;gap:14px}
.braillecell{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-flow:column;grid-template-rows:repeat(3,1fr);gap:12px;background:var(--surface2);border-radius:20px;padding:18px;border:1px solid var(--line)}
.braillecell .dot{width:52px;height:52px;border-radius:50%;background:var(--card);border:2px solid var(--line);color:var(--muted);font-weight:800;font-size:1.1875rem;display:grid;place-items:center;cursor:pointer}
.braillecell .dot.on{background:var(--navy);border-color:var(--navy);color:#fff}
:root[data-theme="dark"] .braillecell .dot.on{background:var(--navy2);color:var(--navy)}
.padresult{text-align:center}
.padresult .big{font-size:1.875rem;font-weight:900;color:var(--navy)}
.padresult .kind{font-size:0.8125rem;color:var(--muted);margin-top:2px}
.cellsrow{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}
.ccell{display:flex;flex-direction:column;align-items:center;gap:8px}
.ccell .mini{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-flow:column;grid-template-rows:repeat(3,1fr);gap:4px;background:var(--surface2);border-radius:10px;padding:8px;border:1px solid var(--line)}
.ccell.unverified .mini{border-color:var(--amber);border-style:dashed}
.ccell .mini i{width:14px;height:14px;border-radius:50%;background:var(--card);border:1.5px solid var(--line);display:block}
.ccell .mini i.on{background:var(--navy);border-color:var(--navy)}
:root[data-theme="dark"] .ccell .mini i.on{background:var(--navy2)}
.ccell label{font-size:0.75rem;font-weight:700;color:var(--ink)}
.ccell.unverified label{color:var(--amber)}
textarea.bptext{width:100%;border:1px solid var(--line);border-radius:14px;padding:13px 14px;font-size:1rem;resize:vertical;min-height:54px;background:var(--card);color:var(--ink);font-family:inherit}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
@media (min-width:760px){ .guide-grid{grid-template-columns:repeat(5,1fr)} }
@media (min-width:1000px){ .guide-grid{grid-template-columns:repeat(7,1fr)} }
.guide-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:10px 8px;text-align:center}
.guide-card .ch{font-size:1.1875rem;font-weight:800}
.guide-card .mini{margin:6px auto 4px}
.guide-card .dn{font-size:0.6875rem;color:var(--muted)}
.note{font-size:0.7813rem;color:var(--muted);line-height:1.5;background:var(--surface2);border-radius:12px;padding:10px 12px}
.note.amber{background:var(--amber-bg);color:var(--amber)}

/* 퀴즈 */
.quizhead{display:flex;align-items:center;justify-content:space-between}
.lives{display:flex;gap:4px}
.progress{height:8px;border-radius:99px;background:var(--surface2);overflow:hidden}
.progress b{display:block;height:100%;background:var(--teal);border-radius:99px;transition:width .3s}
.qclue{background:var(--navy);color:#fff;border-radius:var(--r-lg);padding:22px 18px;text-align:center;font-size:0.9688rem;line-height:1.6}
:root[data-theme="dark"] .qclue{background:#1b2350}
.quizdots{display:flex;justify-content:center;margin-top:12px}
.quizdots .mini{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-flow:column;grid-template-rows:repeat(3,1fr);gap:7px;background:rgba(255,255,255,.12);border-radius:12px;padding:12px}
.quizdots .mini i{width:20px;height:20px;border-radius:50%;background:rgba(255,255,255,.18);border:1.5px solid rgba(255,255,255,.5);display:block}
.quizdots .mini i.on{background:#fff;border-color:#fff}
.qopt{width:100%;text-align:left;background:var(--card);border:1.5px solid var(--line);border-radius:14px;padding:14px 16px;font-size:0.9375rem;font-weight:700;cursor:pointer;display:flex;gap:10px;align-items:center}
.qopt .num{width:26px;height:26px;border-radius:50%;background:var(--surface2);color:var(--muted);display:grid;place-items:center;font-size:0.8125rem;flex:none}
.qopt.correct{border-color:var(--teal);background:var(--mint)}
.qopt.wrong{border-color:var(--danger);background:#ffdad6}
.qopt[disabled]{cursor:default}
.qfeedback{border-radius:14px;padding:14px 16px;font-size:0.875rem;line-height:1.55}
.qfeedback.ok{background:var(--mint);color:var(--mint-ink)}
.qfeedback.bad{background:#ffdad6;color:var(--danger)}
.qresult{text-align:center;padding:30px 10px}
.qresult .score{font-size:3rem;font-weight:900;color:var(--teal)}

/* 영상 플레이어 — 높이는 JS(sizePlayerWrap)가 실제 너비를 재서 px로 직접 정한다.
   구글 드라이브 미리보기(iframe)는 일반 재생 모드에서 자체 재생바만큼 세로 공간을 더 쓰기 때문에,
   순수 16:9보다 조금 더 높게 잡아서 그 몫을 흡수함(확대/전체화면에서는 이 여유가 필요 없어 자동으로 맞음).
   CSS 퍼센트 padding-top 트릭은 플렉스 레이아웃에서 높이가 과도하게 커지는 문제가 있어 JS 계산으로 대체. */
.player-wrap{background:#000;border-radius:var(--r-lg);overflow:hidden;position:relative;width:100%}
.player-wrap iframe{position:absolute;inset:0;width:100%;height:100%;display:block;border:0}
.vmeta h2{font-size:1.125rem}
.vmeta p{color:var(--muted);margin-top:6px;font-size:0.8438rem}
.transcript{display:flex;flex-direction:column;gap:2px;max-height:280px;overflow:auto;border:1px solid var(--line);border-radius:14px;padding:6px}
.tline{margin:0;text-align:left;padding:9px 10px;border-radius:10px;font-size:0.8438rem;line-height:1.5;color:var(--muted)}
.backrow{display:flex;align-items:center;gap:10px}
.backrow .icon-btn{background:var(--surface2)}

/* 하단 탭바 */
.navbar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;justify-content:center}
.navinner{width:100%;max-width:480px;display:grid;grid-template-columns:repeat(4,1fr);background:color-mix(in srgb, var(--surface) 92%, transparent);backdrop-filter:blur(14px);border-top:1px solid var(--line);padding:6px 4px env(safe-area-inset-bottom,6px)}
@media (min-width:760px){ .navinner{max-width:680px} }
@media (min-width:1000px){ .navinner{max-width:900px} }
@media (min-width:1280px){ .navinner{max-width:1100px} }
.navbtn{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 2px;border:0;background:none;color:var(--muted);border-radius:0;position:relative}
.navbtn:not(:last-child)::after{content:"";position:absolute;right:0;top:14%;bottom:14%;width:1px;background:var(--navline)}
.navbtn svg{width:22px;height:22px}
.navbtn span{font-size:0.6875rem;font-weight:700}
.navbtn.active{color:var(--teal)}

.skiplink{position:fixed;top:-60px;left:8px;background:var(--navy);color:#fff;padding:10px 16px;border-radius:10px;z-index:100;transition:top .15s}
.skiplink:focus{top:8px}
@media (prefers-reduced-motion: reduce){ *{animation:none!important;transition:none!important} }