:root{--paper:#f4f0e7;--paper2:#fbf8f1;--ink:#202521;--muted:#6d736f;--line:#d9d2c6;--accent:#2f4e43;--accent2:#e5ece7;--ok:#365f4f;--bad:#8a5c45;--youtube:#b63832;--youtube-dark:#922c28;--shadow:0 18px 55px rgba(34,42,37,.10);--radius:24px}
*{box-sizing:border-box}html{background:var(--paper);color:var(--ink)}
body{margin:0;min-height:100vh;font-family:Pretendard,"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",sans-serif;background:radial-gradient(circle at 20% 10%,rgba(255,255,255,.72),transparent 34%),linear-gradient(180deg,#f8f5ee 0%,var(--paper) 100%)}
a{color:inherit}button,input{font:inherit}.shell{width:min(100%,820px);margin:0 auto;padding:22px 18px 44px;transition:width .2s ease}.play-layout{display:block}.game-card{min-width:0}
.brandbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:16px;color:var(--muted);font-size:14px}.brand{font-weight:900;color:var(--ink);text-decoration:none}
.card{background:rgba(251,248,241,.97);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.topline{padding:18px 22px 0}.progress-wrap{display:flex;align-items:center;gap:12px}.progress-track{flex:1;height:8px;background:#e9e2d7;border-radius:999px;overflow:hidden}.progress-bar{height:100%;width:0;background:var(--accent);transition:width .3s ease;border-radius:999px}.progress-label{min-width:60px;text-align:right;color:var(--muted);font-size:13px;font-weight:700}
.stage{padding:34px 32px 30px;min-height:560px;display:flex;flex-direction:column;justify-content:center}.eyebrow{color:var(--accent);font-size:14px;font-weight:800;margin-bottom:12px}.word,h1,h2{font-family:"Noto Serif KR","Nanum Myeongjo","Batang",serif}.word{font-size:clamp(48px,9vw,76px);line-height:1.05;letter-spacing:-.05em;margin:0;font-weight:700}.hanja{font-family:"Noto Serif KR","Batang",serif;color:var(--muted);font-size:26px;margin-top:8px;letter-spacing:.08em}
h1,h2{font-size:clamp(27px,5.8vw,38px);line-height:1.35;letter-spacing:-.04em;margin:0 0 12px}p{line-height:1.75;letter-spacing:-.02em}.lead{font-size:18px;color:#434843;margin:24px 0 20px}.small,.source-note{font-size:12px;color:var(--muted)}
.choices{display:grid;gap:11px;margin-top:22px}.choice{width:100%;text-align:left;border:1px solid var(--line);border-radius:16px;background:#fffdfa;padding:17px 18px;color:var(--ink);line-height:1.55;cursor:pointer}.choice.selected{border-color:var(--accent);background:var(--accent2);box-shadow:0 0 0 2px rgba(46,76,66,.12)}.choice.correct{border-color:var(--ok);background:#e7efe9}.choice.wrong{border-color:#9a6d56;background:#f5ebe5}
.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.btn{border:0;border-radius:14px;padding:14px 18px;font-weight:800;text-decoration:none;text-align:center;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:6px}.btn-primary{background:var(--accent);color:#fff;min-width:138px}.btn-primary:disabled{opacity:.42;cursor:not-allowed}.btn-ghost{background:#ece7dd;color:#3e443f}.btn-outline{background:transparent;border:1px solid var(--line);color:var(--ink)}.btn-video{background:var(--accent);color:#fff}.btn-subscribe{background:var(--youtube);color:#fff}.btn-subscribe:hover{background:var(--youtube-dark)}
.feedback{margin-top:18px;padding:17px 18px;border-radius:16px;border:1px solid var(--line);line-height:1.7}.feedback.ok{background:#e8efea;border-color:#c9d8cf}.feedback.no{background:#f6ece7;border-color:#e0cabe}.feedback strong{display:block;margin-bottom:4px}
.hanja-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:22px 0}.hanja-card{min-height:180px;border:1px solid var(--line);border-radius:20px;background:#fffdfa;padding:22px 18px;display:flex;flex-direction:column;align-items:center;justify-content:center;position:relative}.hanja-card button{border:0;background:transparent;position:absolute;inset:0;width:100%;height:100%;cursor:pointer}.hanja-char{font-family:"Noto Serif KR","Batang",serif;font-size:58px}.hanja-meta{text-align:center;color:var(--muted);font-size:14px;line-height:1.6;min-height:48px}.hanja-card.revealed{background:var(--accent2);border-color:#b6c7bd}
.root-note,.meaning-box,.support-box{padding:18px 20px;border-radius:18px;background:#efe9de;line-height:1.75;text-align:left}.hidden{display:none!important}.result{text-align:center}.result-word{font-size:56px}.score{font-size:42px;font-weight:900;margin:20px 0 6px}
.result-media-cta{margin-top:20px;padding:18px;border:1px solid #d5ddd7;border-radius:18px;background:#f4f7f4;text-align:left}.result-media-cta.compact{background:#f7f4ef;border-color:var(--line)}.result-media-copy{line-height:1.65;color:#4b514d}.result-media-buttons{margin-top:14px}.result-basic-buttons{justify-content:center}
.lesson-list{display:grid;gap:12px;margin-top:20px}.lesson-card{display:block;border:1px solid var(--line);border-radius:18px;background:#fffdfa;padding:18px;text-decoration:none}.lesson-head{display:flex;justify-content:space-between;gap:14px}.lesson-no{font-size:13px;color:var(--muted);font-weight:800}.lesson-title{font-family:"Noto Serif KR","Batang",serif;font-size:26px;font-weight:800}.lesson-hanja{color:var(--muted);margin-left:8px;font-weight:500}.lesson-desc{color:#4a4f4b;margin-top:9px;line-height:1.65}.tag{display:inline-block;padding:5px 9px;border-radius:999px;background:#ece7dd;color:#5a5f5b;font-size:12px}
.nav-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}.nav-row .btn[aria-disabled="true"]{opacity:.4;pointer-events:none}.footer-note{text-align:center;padding:18px;color:var(--muted);font-size:12px}.error{color:#7d3d2a;white-space:pre-wrap}

/* Desktop lesson video */
.video-panel{display:none}.video-panel-inner{background:rgba(251,248,241,.97);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);padding:18px}.media-eyebrow{color:var(--accent);font-weight:900;font-size:13px;margin-bottom:7px}.video-title{font-size:22px;line-height:1.42;margin:0 0 14px;letter-spacing:-.035em}.video-frame-wrap{position:relative;width:100%;aspect-ratio:16/9;background:#171a18;border-radius:15px;overflow:hidden}.video-frame-wrap iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.video-copy{font-size:14px;color:#555b57;margin:13px 1px 0;line-height:1.65}.video-actions{display:grid;gap:9px;margin-top:14px}.video-actions .btn{width:100%;padding:12px 14px;font-size:14px}.video-pulse{animation:videoPulse .9s ease}@keyframes videoPulse{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}

/* Mobile / tablet bottom video dock */
.mobile-video-dock{display:none;position:fixed;left:0;right:0;bottom:0;z-index:100;padding:0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);filter:drop-shadow(0 -10px 28px rgba(35,42,38,.16))}.mobile-video-dock-inner{width:min(100%,680px);margin:0 auto;background:#fffdfa;border:1px solid var(--line);border-bottom:0;border-radius:18px 18px 0 0;overflow:hidden}.mobile-video-bar{width:100%;min-height:66px;border:0;background:#fffdfa;color:var(--ink);display:grid;grid-template-columns:38px 1fr 28px;gap:10px;align-items:center;text-align:left;padding:10px 14px;cursor:pointer}.mobile-video-play{width:36px;height:36px;border-radius:50%;display:grid;place-items:center;background:var(--accent);color:#fff;font-size:14px}.mobile-video-text{min-width:0}.mobile-video-label{display:block;color:var(--accent);font-size:11px;font-weight:900;margin-bottom:2px}.mobile-video-topic{display:block;font-size:14px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mobile-video-chevron{font-size:20px;color:var(--muted);text-align:center}.mobile-video-sheet{padding:12px 14px 14px;border-bottom:1px solid var(--line);background:#fbf8f1}.mobile-video-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:10px}.mobile-video-actions .btn{padding:11px 9px;font-size:13px}.mobile-video-close{width:100%;margin-top:8px;border:0;background:transparent;color:var(--muted);padding:8px;cursor:pointer;font-weight:700}

@media(min-width:1100px){body.has-video .shell{width:min(calc(100% - 36px),1220px)}body.has-video .play-layout{display:grid;grid-template-columns:minmax(0,820px) 360px;gap:24px;align-items:start}body.has-video .video-panel{display:block;position:sticky;top:20px}.mobile-video-dock{display:none!important}}
@media(max-width:1099px){body.has-video{padding-bottom:78px}body.has-video .mobile-video-dock{display:block}.video-panel{display:none!important}}
@media(max-width:600px){.shell{padding:12px 10px 26px}.stage{padding:26px 20px 24px;min-height:520px}.topline{padding:15px 16px 0}.choice{padding:15px}.button-row .btn{flex:1}.lesson-head{display:block}.nav-row{grid-template-columns:1fr}.result-media-buttons{display:grid;grid-template-columns:1fr}.result-media-buttons .btn{width:100%}.mobile-video-dock-inner{border-left:0;border-right:0;border-radius:16px 16px 0 0}}

/* PLAY v0.8 library polish */
body.library-mode .shell{width:min(calc(100% - 36px),1120px);padding-bottom:32px}
body.library-mode .topline{display:none}
body.library-mode .game-card{overflow:visible}
body.library-mode .stage{min-height:auto;justify-content:flex-start;padding:44px 38px 40px}
body.library-mode .stage>h1{max-width:760px;margin-bottom:6px}
body.library-mode .lesson-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:30px}
body.library-mode .lesson-card{min-height:164px;padding:20px 20px 18px;transition:transform .16s ease,box-shadow .16s ease,border-color .16s ease}
body.library-mode .lesson-card:hover{transform:translateY(-3px);border-color:#bdb5a8;box-shadow:0 12px 28px rgba(34,42,37,.08)}
body.library-mode .lesson-head{align-items:flex-start}
body.library-mode .lesson-title{margin-top:4px;font-size:29px;line-height:1.2}
body.library-mode .lesson-desc{margin-top:16px;padding-right:6px}
body.library-mode .tag{flex:0 0 auto;min-width:58px;min-height:58px;display:inline-flex;align-items:center;justify-content:center;text-align:center;line-height:1.25;padding:8px 10px}
.source-note{display:none}
.footer-note{display:none}
@media(max-width:760px){body.library-mode .shell{width:100%;padding:12px 10px 26px}body.library-mode .stage{padding:28px 20px 24px}body.library-mode .lesson-list{grid-template-columns:1fr;gap:12px;margin-top:20px}body.library-mode .lesson-card{min-height:0;padding:18px}body.library-mode .lesson-title{font-size:26px}body.library-mode .tag{min-width:0;min-height:0;display:inline-block;padding:5px 9px}}


/* PLAY v0.8.1 worksheet links */
.start-worksheet-link{display:grid;grid-template-columns:34px 1fr;gap:11px;align-items:center;margin-top:18px;padding:13px 15px;border:1px solid var(--line);border-radius:15px;background:#f7f4ee;color:var(--ink);text-decoration:none;text-align:left}.start-worksheet-link:hover{border-color:#b8c5bc;background:#f2f5f1}.start-worksheet-icon{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--accent2);color:var(--accent);font-size:18px;font-weight:900}.start-worksheet-link strong{display:block;font-size:13px;margin-bottom:2px}.start-worksheet-link small{display:block;color:var(--muted);font-size:12px;line-height:1.45}
.result-worksheet-cta{display:grid;grid-template-columns:118px minmax(0,1fr);gap:18px;align-items:center;margin-top:20px;padding:18px;border:1px solid #d5ddd7;border-radius:18px;background:#f7f4ef;text-align:left}.result-worksheet-preview{display:block}.result-worksheet-preview img{display:block;width:100%;height:auto;max-height:160px;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 7px 20px rgba(34,42,37,.08)}.result-worksheet-kicker{color:var(--accent);font-size:12px;font-weight:900;letter-spacing:.05em;margin-bottom:4px}.result-worksheet-title{font-size:18px;font-weight:900;line-height:1.4;margin-bottom:6px}.result-worksheet-copy{color:#555b57;font-size:14px;line-height:1.65}.result-worksheet-buttons{margin-top:12px}.result-worksheet-buttons .btn{padding:12px 14px;font-size:14px}
@media(max-width:600px){.result-worksheet-cta{grid-template-columns:1fr;padding:16px}.result-worksheet-preview{width:min(48%,180px);margin:0 auto}.result-worksheet-body{text-align:left}.result-worksheet-buttons{display:grid;grid-template-columns:1fr}.result-worksheet-buttons .btn{width:100%}}