/* 춘:천천박사 — 밝은 봄 춘천 학습 놀이터. 흰 바탕, 호수 청록·벚꽃 분홍·햇살 노랑, 두툼한 입체 버튼. */
:root{--bg:#F2FBF9;--card:#fff;--ln:#D8EBE6;--lnb:#BFDCD4;--tx:#173B3A;--tx2:#58807B;--tx3:#8FAEA9;
--tq:#10BFC2;--tqd:#0A9497;--tql:#D8F6F5;--pk:#FF86AC;--pkd:#DB5A82;--pkl:#FFE4EE;--yl:#FFC83D;--yld:#E0A012;--yll:#FFF3CC;
--gn:#4CC777;--gnd:#2E9F55;--gnl:#DDF7E6;--rd:#FF6B5E;--rdd:#D94A3E;--rdl:#FFE3E0;--bl:#4DA3FF;--bld:#2C7CD6;color-scheme:light}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0}
body{background:var(--bg);color:var(--tx);font:500 16px/1.6 "Noto Sans KR",system-ui,sans-serif;word-break:keep-all;min-height:100vh;overflow-x:hidden;
padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));padding-block:0 48px}
button,a{font:inherit}button{color:inherit;cursor:pointer;border:0;background:none;padding:0}
img,svg{display:block;max-width:100%}h1,h2,h3,p{margin:0}
.jua{font-family:Jua,"Gowun Dodum","Noto Sans KR",sans-serif;font-weight:400}
:focus-visible{outline:3px solid var(--bl);outline-offset:3px;border-radius:12px}
.app{max-width:1120px;margin:0 auto}
.top{display:flex;align-items:center;justify-content:space-between;padding:12px 0;position:sticky;top:0;z-index:20;background:rgba(242,251,249,.94);backdrop-filter:blur(10px)}
.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none}
.tile{width:42px;height:42px;border-radius:14px;background:var(--tq);box-shadow:0 3px 0 var(--tqd);display:grid;place-items:center;overflow:hidden;flex:none}
.tile img{width:36px;height:36px;object-fit:contain;margin-top:4px}
.wm{font:400 25px/1 Jua,sans-serif;color:var(--tqd)}.wm i{font-style:normal;color:var(--pk)}
.chip{display:inline-flex;align-items:center;justify-content:center;height:40px;min-width:44px;padding:0 12px;border-radius:14px;background:#fff;border:2px solid var(--ln);border-bottom-width:4px;font-weight:800;font-size:18px}
.chip:active{transform:translateY(2px)}
.card{background:#fff;border:2px solid var(--ln);border-bottom-width:5px;border-radius:24px}
.screen{display:none;animation:in .35s ease both}.screen.on{display:block}
@keyframes in{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;height:58px;padding:0 26px;border-radius:18px;font:400 22px Jua,sans-serif;letter-spacing:.02em;color:#fff;background:var(--tq);box-shadow:0 6px 0 var(--tqd);transition:transform .08s,box-shadow .08s;text-shadow:0 1px 0 rgba(0,0,0,.12);margin-top:18px;text-decoration:none}
.btn:active{transform:translateY(5px);box-shadow:0 1px 0 var(--tqd)}
.btn.yl{background:var(--yl);box-shadow:0 6px 0 var(--yld);color:#5A3B00;text-shadow:none}.btn.yl:active{box-shadow:0 1px 0 var(--yld)}
.btn.sub{background:#fff;color:var(--tqd);border:2px solid var(--ln);box-shadow:0 5px 0 var(--lnb);text-shadow:none;height:52px;font-size:19px}.btn.sub:active{box-shadow:0 1px 0 var(--lnb)}
.eyebrow{font:800 12px/1 Sora,"Noto Sans KR";letter-spacing:.16em;color:var(--tx3)}
.pill{display:inline-block;font-size:13px;font-weight:800;padding:4px 12px;border-radius:99px;background:var(--tql);color:var(--tqd)}
/* 히어로 */
.art{position:relative;height:230px;overflow:hidden;border-radius:22px 22px 0 0;background:linear-gradient(180deg,#8FE3E4,#C9F3F0 68%,#F2FBF9)}
.art::before,.art::after{content:"";position:absolute;background:#fff;border-radius:99px;opacity:.8}
.art::before{width:110px;height:34px;left:8%;top:34px;box-shadow:34px -14px 0 -2px #fff}
.art::after{width:90px;height:28px;right:10%;top:60px;box-shadow:-26px -12px 0 -2px #fff}
.art .bubble{position:absolute;left:50%;top:14px;transform:translateX(-50%);z-index:2;background:#fff;border-radius:18px;padding:8px 16px;font:400 18px Jua,sans-serif;box-shadow:0 4px 0 rgba(0,0,0,.1);white-space:nowrap}
.art .bubble::after{content:"";position:absolute;left:50%;bottom:-8px;margin-left:-8px;border:8px solid transparent;border-top-color:#fff;border-bottom:0}
.art figure{position:absolute;bottom:10px;margin:0;text-align:center;z-index:1}
.art figure img{filter:drop-shadow(0 8px 5px rgba(0,0,0,.18));animation:bob 3.2s ease-in-out infinite}
.art .f1{left:9%}.art .f1 img{width:min(34vw,150px)}.art .f2{right:9%}.art .f2 img{width:min(40vw,176px);animation-delay:-1.4s}
.art figcaption{position:relative;display:inline-block;font:400 15px Jua,sans-serif;background:var(--pk);color:#fff;padding:2px 12px;border-radius:99px;box-shadow:0 3px 0 var(--pkd);margin-top:-10px}
.art .f2 figcaption{background:var(--yl);color:#5A3B00;box-shadow:0 3px 0 var(--yld)}
@keyframes bob{50%{transform:translateY(-7px)}}
.hin{padding:22px 20px 22px}
.hin h1{font:400 40px/1.15 Jua,sans-serif;margin:8px 0 6px;color:var(--tx)}.hin h1 i{font-style:normal;color:var(--pk)}
.lead{color:var(--tx2);font-size:16.5px;line-height:1.7}
.goals{display:grid;gap:10px;margin-top:16px}
.goal{display:grid;grid-template-columns:46px 1fr;gap:12px;align-items:center;padding:12px 14px;border-radius:18px;background:var(--bg);border:2px solid var(--ln)}
.gi{width:46px;height:46px;border-radius:15px;display:grid;place-items:center;background:var(--c);box-shadow:0 3px 0 var(--cd);font-size:22px}
.goal b{display:block;font:400 18px Jua,sans-serif}.goal div span{font-size:14px;color:var(--tx2);line-height:1.5;display:block}
/* 칭호·진행 */
.xp{height:18px;border-radius:99px;background:#E6F1EE;overflow:hidden}
.xp i{display:block;height:100%;width:0;border-radius:99px;background:var(--yl);position:relative;transition:width .9s cubic-bezier(.2,1.2,.3,1)}
.xp i::after{content:"";position:absolute;left:8px;right:8px;top:4px;height:4px;border-radius:4px;background:rgba(255,255,255,.55)}
.xpl{display:flex;justify-content:space-between;font-size:13.5px;margin-top:7px;color:var(--tx2);font-weight:700}
.stat3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.stat{padding:12px 6px;text-align:center}.stat b{display:block;font:800 22px/1.2 Sora,sans-serif}.stat span{font-size:12.5px;color:var(--tx2);font-weight:700}
.stat:nth-child(1) b{color:var(--tqd)}.stat:nth-child(2) b{color:var(--gnd)}.stat:nth-child(3) b{color:var(--pkd)}
.sec{font:400 24px/1.3 Jua,sans-serif;margin:0 0 8px}.secp{color:var(--tx2);line-height:1.7;font-size:15.5px}.secp b{color:var(--tx)}
.medal{flex:none;width:48px;height:48px;border-radius:50%;display:grid;place-items:center;text-align:center;line-height:1;font-weight:900;color:#fff;border:3px solid rgba(255,255,255,.75);box-shadow:0 3px 0 rgba(0,0,0,.16)}
.medal i{font-style:normal;display:block;font-size:16px}.medal u{text-decoration:none;display:block;font-size:12px;opacity:.95}
.medal.g0{background:#A8B5B0}.medal.g1{background:var(--tq)}.medal.g2{background:var(--bl)}.medal.g3{background:var(--pk)}.medal.g4,.medal.g5{background:linear-gradient(135deg,#ffd45c,#eb9d00)}
.minirow{display:flex;justify-content:space-between;gap:4px;margin:16px 0 4px}.minirow div{flex:1;text-align:center;font-size:12.5px;font-weight:800;color:var(--tx2);line-height:1.3}.minirow .medal{margin:0 auto 6px;width:54px;height:54px}
.more{display:block;text-align:center;margin-top:10px;font-weight:800;color:var(--tqd);text-decoration:none}
.note{font-size:13px;color:var(--tx3);text-align:center;margin-top:16px}
.stack{display:grid;gap:18px;margin-top:14px}
/* 챕터 */
.chapart{height:200px}.chapart .f{position:absolute;left:50%;bottom:0;transform:translateX(-50%);margin:0}.chapart .f img{width:170px;animation:bob 3s ease-in-out infinite;filter:drop-shadow(0 8px 5px rgba(0,0,0,.18))}
.chapart .no{position:absolute;left:14px;top:14px;font:400 17px Jua,sans-serif;background:#fff;padding:3px 14px;border-radius:99px;box-shadow:0 3px 0 rgba(0,0,0,.1)}
.ctitle{font:400 34px/1.2 Jua,sans-serif;text-align:center;margin-bottom:4px}
.cnow{text-align:center;color:var(--tx2)}.cnow b{color:var(--tx);font:400 22px Jua,sans-serif}
.cinfo{display:grid;gap:8px;margin-top:16px}
.ci{display:grid;grid-template-columns:40px 1fr;gap:12px;align-items:center;padding:10px 12px;border-radius:16px;background:var(--bg);border:2px solid var(--ln);font-size:15px;line-height:1.5;color:var(--tx2)}.ci b{color:var(--tx)}.ci .gi{width:40px;height:40px;font-size:19px}
/* 풀이 */
.pbar{display:flex;align-items:center;gap:12px;padding:6px 2px 2px}
.x{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;font-size:26px;color:var(--tx3);font-weight:900}
.dots{flex:1;height:18px;border-radius:99px;background:#E1EEEA;position:relative}
.dots>i{display:block;height:100%;border-radius:99px;background:var(--gn);width:0;position:relative;transition:width .6s cubic-bezier(.3,1.3,.5,1)}
.dots>i::after{content:"";position:absolute;left:8px;right:8px;top:4px;height:4px;border-radius:4px;background:rgba(255,255,255,.5)}
.dots img{position:absolute;top:-17px;left:0;width:46px;height:46px;margin-left:-23px;transition:left .6s cubic-bezier(.3,1.3,.5,1);pointer-events:none}
.qn{font:800 15px Sora,sans-serif;color:var(--tx2);min-width:46px;text-align:right}
.qcard{margin-top:18px;padding:22px 18px}
.tags{display:flex;gap:8px;flex-wrap:wrap}.tag{font-size:12.5px;font-weight:800;padding:4px 12px;border-radius:99px;background:#EAF3F0;color:var(--tx2)}.tag.lv{background:var(--gnl);color:var(--gnd)}
.q{font:400 27px/1.45 Jua,sans-serif;margin:14px 0 2px;letter-spacing:-.01em}
.qimg{margin:14px 0 0;text-align:center}.qimg img{margin:0 auto;max-height:230px;border-radius:16px;border:2px solid var(--ln);background:#fff;padding:6px}.qimg figcaption{font-size:12px;color:var(--tx3);margin-top:4px}
.hintbtn{display:flex;align-items:center;justify-content:center;gap:6px;margin:14px auto 0;width:max-content;max-width:100%;font:400 18px Jua,sans-serif;color:#8A5E00;background:var(--yll);border:2px dashed var(--yld);border-radius:99px;padding:7px 18px;text-decoration:none}
.hintnote{text-align:center;font-size:13px;color:var(--tx3);margin-top:6px}
.opts{display:grid;gap:12px;margin-top:16px}
.opt{display:grid;grid-template-columns:38px 1fr;gap:14px;align-items:center;text-align:left;width:100%;padding:14px 16px;border-radius:20px;background:#fff;border:2px solid var(--ln);border-bottom-width:6px;font:400 22px/1.35 Jua,sans-serif;transition:transform .08s,background .2s}
.opt:active{transform:translateY(3px);border-bottom-width:3px}
.opt kbd{font:800 15px Sora,sans-serif;width:38px;height:38px;border-radius:13px;border:2px solid var(--ln);display:grid;place-items:center;color:var(--tx2);background:#fff}
.opt:nth-child(1) kbd{border-color:var(--yl);color:var(--yld)}.opt:nth-child(2) kbd{border-color:var(--tq);color:var(--tqd)}.opt:nth-child(3) kbd{border-color:var(--bl);color:var(--bld)}.opt:nth-child(4) kbd{border-color:var(--pk);color:var(--pkd)}
.opt.ok{border-color:var(--gn);background:var(--gnl);color:var(--gnd);animation:pop .4s}.opt.ok kbd{background:var(--gn);border-color:var(--gn);color:#fff}
.opt.no{border-color:var(--rd);background:var(--rdl);color:var(--rdd);animation:shake .35s}.opt.no kbd{background:var(--rd);border-color:var(--rd);color:#fff}
.opt.dim{opacity:.5}
@keyframes pop{50%{transform:scale(1.03)}}@keyframes shake{25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}
.sheet{display:none;margin-top:16px;padding:18px;position:relative;overflow:hidden;border-width:2px;border-bottom-width:5px}.sheet.on{display:block;animation:rise .45s}
@keyframes rise{from{transform:translateY(14px);opacity:0}}
.sheet.good{background:var(--gnl);border-color:var(--gn)}.sheet.bad{background:var(--rdl);border-color:var(--rd)}
.sheet .big{font:400 36px/1.1 Jua,sans-serif;padding-right:110px}.sheet.good .big{color:var(--gnd)}.sheet.bad .big{color:var(--rdd)}
.sheet .mas{position:absolute;right:10px;top:8px;width:96px}.sheet .mas.hop{animation:hop .6s cubic-bezier(.3,1.6,.5,1)}.sheet .mas.shake{animation:shake .45s}
@keyframes hop{35%{transform:translateY(-26px) scale(1.08,.94)}70%{transform:translateY(0) scale(.95,1.06)}}
.sheet p{margin-top:8px;padding-right:100px;min-height:56px;font-size:16px;line-height:1.7}.sheet a{color:var(--tqd);font-weight:800}
.gain{display:inline-flex;margin-top:10px;font:400 18px Jua,sans-serif;color:#5A3B00;background:var(--yl);padding:3px 14px;border-radius:99px;box-shadow:0 3px 0 var(--yld)}
/* 결과 */
.resart{height:190px}.resart .f{position:absolute;left:50%;bottom:0;transform:translateX(-50%);margin:0}.resart .f img{width:160px;animation:bob 3s ease-in-out infinite;filter:drop-shadow(0 8px 5px rgba(0,0,0,.18))}
.big2{font:400 54px/1.1 Jua,sans-serif;text-align:center;color:var(--tqd);margin-top:12px}.big2 small{font-size:24px;color:var(--tx2)}
.msg{text-align:center;color:var(--tx2);margin-top:4px}
.rtier{margin-top:16px;padding:14px;border-radius:18px;background:var(--bg);border:2px solid var(--ln);display:grid;grid-template-columns:54px 1fr;gap:12px;align-items:center}.rtier b{font:400 21px Jua,sans-serif}.rtier .xp{margin-top:6px;height:14px}
.row2{display:grid;gap:0}
/* 승급 */
.promo{position:fixed;inset:0;z-index:60;display:none;place-items:center;padding:20px;background:radial-gradient(70% 60% at 50% 40%,#FFF3C4,#7FE3E1 70%,#10BFC2)}
.promo.on{display:grid;animation:fade .4s}@keyframes fade{from{opacity:0}}
.pbox{text-align:center;max-width:420px;width:100%;animation:zoom .7s cubic-bezier(.2,1.4,.4,1);position:relative}
@keyframes zoom{from{transform:scale(.55) translateY(40px);opacity:0}}
.pbox h2{font:400 52px/1.15 Jua,sans-serif;margin:8px 0;color:#fff;text-shadow:0 4px 0 rgba(0,0,0,.18)}.pbox p{color:#0E4B4C;font-weight:700;font-size:17px}
.pbox .pk{font:800 13px Sora,sans-serif;letter-spacing:.2em;color:#0E4B4C}
.pbox img{width:min(56vw,220px);margin:6px auto;animation:hop .9s .2s both}
.rays{position:absolute;left:50%;top:36%;width:640px;height:640px;margin:-320px 0 0 -320px;background:repeating-conic-gradient(rgba(255,255,255,.4) 0 8deg,transparent 8deg 24deg);border-radius:50%;-webkit-mask:radial-gradient(circle,#000 15%,transparent 70%);mask:radial-gradient(circle,#000 15%,transparent 70%);animation:spin 20s linear infinite;pointer-events:none}
@keyframes spin{to{transform:rotate(360deg)}}
.pbox>*:not(.rays){position:relative;z-index:1}
canvas#cf{position:fixed;inset:0;pointer-events:none;z-index:70;width:100%;height:100%}
/* 가이드 */
.ladder{list-style:none;margin:14px 0 0;padding:0;display:grid;gap:10px}
.ladder li{display:flex;align-items:center;gap:12px;padding:10px 12px;border:2px solid var(--ln);border-bottom-width:4px;border-radius:18px;background:#fff}
.ladder .tx{flex:1;min-width:0}.ladder .nm{font:400 20px Jua,sans-serif}.ladder .ds{font-size:13.5px;color:var(--tx2);line-height:1.45}.ladder .need{font:800 13px Sora,sans-serif;color:var(--tqd);white-space:nowrap}
.back{display:inline-block;margin:4px 0 12px;font-weight:800;color:var(--tqd);text-decoration:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media (min-width:900px){
 body{font-size:17px}.wrap{max-width:1040px;margin:0 auto}
 .top{padding:18px 0}.wm{font-size:28px}
 #home.on{display:grid;grid-template-columns:1.1fr 1fr;gap:24px;align-items:start}#home .note{grid-column:1/-1}#home .stack{margin-top:0}
 .art{height:300px}.art .f1 img{width:180px}.art .f2 img{width:215px}.art .bubble{font-size:22px;padding:10px 22px}
 .hin h1{font-size:54px}.lead{font-size:18px}
 #chap,#res{max-width:640px;margin:0 auto}#play{max-width:820px;margin:0 auto}
 .q{font-size:34px}.opts{grid-template-columns:1fr 1fr}.opt{font-size:25px;padding:18px}
 .ladder{grid-template-columns:1fr 1fr}.guide{max-width:960px;margin:0 auto}
}