/* Layout: one phone column on notebook paper. 우짜니 is the only character, big and centre-stage; 쌤's question is a taped note above him, answers below. Single paper look by choice. */
@font-face{font-family:"Gmarket Sans";font-weight:700;src:url(../assets/fonts/GmarketSansTTFBold.ttf) format("truetype");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:600;src:url(../assets/fonts/Pretendard-SemiBold.ttf) format("truetype");font-display:swap}
@font-face{font-family:"Pretendard";font-weight:700;src:url(../assets/fonts/Pretendard-Bold.ttf) format("truetype");font-display:swap}
@font-face{font-family:"UhBee";src:url(../assets/fonts/UhBeeQUEENJ.ttf) format("truetype");font-display:swap}
:root{
  --paper:#fffaf0; --grid:#efe6d2; --ink:#232323; --ink2:#6b6458;
  --blue:#3f8ee0; --pink:#f6b9c4; --hl:#fff0a8;
  --ok:#2e9c5a; --ok-soft:#e5f6ea; --no:#e2574c; --no-soft:#fdebe8; --white:#ffffff;
  --display:"Gmarket Sans","Pretendard","Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  --body:"Pretendard","Apple SD Gothic Neo","Noto Sans KR",system-ui,sans-serif;
  --hand:"UhBee","Pretendard","Apple SD Gothic Neo",sans-serif;
  --wob:16px 22px 14px 24px / 22px 14px 24px 16px;
  color-scheme:light;
}
*,*:before,*:after{box-sizing:border-box}
html,body{height:100%;margin:0}
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
img{max-width:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--body);font-weight:600;-webkit-tap-highlight-color:transparent}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,textarea:focus-visible{outline:3px dashed var(--blue);outline-offset:3px}
#app{max-width:440px;margin:0 auto;min-height:100%;display:flex;flex-direction:column;position:relative;overflow:hidden;
  background:var(--paper) repeating-linear-gradient(0deg,transparent 0 27px,var(--grid) 27px 28px)}
.screen{display:flex;flex-direction:column;flex:1;padding:14px 16px 22px;gap:12px}
.top{display:flex;align-items:center;gap:10px}
.top img{height:26px}
.dots{display:flex;gap:3px;flex:1;justify-content:center;min-width:0}
.dots i{width:11px;height:11px;border:2px solid var(--ink);border-radius:50% 45% 50% 40%;background:var(--white);transition:background .3s,transform .3s}
.dots i.now{background:var(--hl);transform:scale(1.25)}
.dots i.ok{background:var(--ok)}.dots i.ok2{background:#9ad4ac}.dots i.no{background:#cfc8bb}
.ghost{border:0;background:none;color:var(--ink2);font-size:13px;padding:4px;white-space:nowrap;flex:none}
.board{display:flex;justify-content:center;gap:10px;font-family:var(--display);font-size:14px}
.board span{background:var(--white);border:2px solid var(--ink);border-radius:var(--wob);padding:5px 12px;font-variant-numeric:tabular-nums}
.board b{color:var(--blue);margin-left:6px}
.board span.me b{color:var(--ok)}
.note{position:relative;margin-top:8px;background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:20px 16px 16px;transform:rotate(-.6deg);box-shadow:3px 4px 0 rgba(35,35,35,.12)}
.note:before{content:"";position:absolute;top:-11px;left:50%;width:84px;height:20px;margin-left:-42px;background:rgba(246,185,196,.75);transform:rotate(2deg)}
.note .who{font-family:var(--display);font-size:12px;letter-spacing:.06em;color:var(--ink2)}
.note h2{font-family:var(--display);font-size:21px;line-height:1.4;margin:6px 0 0;word-break:keep-all;text-wrap:balance}
.hint{margin:10px 0 0;font-size:15px;line-height:1.6;animation:fade .4s}
.hint span{background:linear-gradient(transparent 50%,var(--hl) 50%)}
.stage{display:flex;align-items:flex-end;justify-content:center;gap:4px;min-height:166px;position:relative}
.uzwrap{width:158px;height:158px;flex:none;position:relative}
.uz{width:100%;height:100%;object-fit:contain;transform-origin:50% 90%;cursor:pointer}
.uz.idle{animation:popin .35s ease,sway 2.4s ease-in-out .35s infinite}
.uz.jump{animation:jump .6s ease}
.uz.shake{animation:shake .5s ease}
.uz.spin{animation:spin .7s ease}
.uz.faint{animation:faint 1s ease forwards}
.uz.pop{animation:popin .35s ease}
.bubble{position:relative;align-self:center;max-width:52%;min-width:0;min-height:44px;box-sizing:border-box;display:flex;flex-direction:column;justify-content:center;background:var(--white);border:2.5px solid var(--ink);border-radius:16px;padding:10px 12px;font-family:var(--hand);font-size:18px;line-height:1.35;word-break:keep-all;animation:popin .3s}
.bubble:after{content:"";position:absolute;left:-15px;top:50%;width:16px;height:24px;margin-top:-12px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 24'%3E%3Cpath d='M16 1.5 L2 12 L16 22.5' fill='%23ffffff' stroke='%23232323' stroke-width='2.5' stroke-linejoin='round'/%3E%3Crect x='13.6' y='3' width='3' height='18' fill='%23ffffff'/%3E%3C/svg%3E") no-repeat center/100% 100%}
.bubble .oxm{font-family:var(--display);font-weight:700;font-size:1.05em;padding:0 1px}
.bubble .oxm.o{color:var(--blue)}.bubble .oxm.x{color:var(--no)}
.bubble small{display:block;font-family:var(--body);font-size:11px;color:var(--blue);margin-bottom:2px}
.burst{position:absolute;inset:0;pointer-events:none}
.burst i{position:absolute;left:50%;top:45%;width:10px;height:10px;border-radius:50%;border:1.5px solid var(--ink);animation:fly .9s ease-out forwards}
.opts{display:grid;gap:10px}
.opts.ox{grid-template-columns:1fr 1fr}
.opt{position:relative;background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:13px 14px 13px 46px;text-align:left;font-size:16px;line-height:1.35;word-break:keep-all;transition:transform .12s,background .2s}
.opt:before{content:attr(data-n);position:absolute;left:12px;top:50%;margin-top:-13px;width:24px;height:24px;border:2px solid var(--ink);border-radius:50%;font-family:var(--display);font-size:13px;line-height:22px;text-align:center}
.opt:active{transform:scale(.97) rotate(-.5deg)}
.ox .opt{padding:16px 0 12px;text-align:center;font-family:var(--display);font-size:58px;line-height:1}
.ox .opt:before{display:none}
.ox .opt[data-v="O"]{color:var(--blue)}.ox .opt[data-v="X"]{color:var(--no)}
.opt.right{background:var(--ok-soft);border-color:var(--ok)}
.opt.wrong{background:var(--no-soft);border-color:var(--no);opacity:.55;animation:shake .4s}
.opt[disabled]{cursor:default}
.tag{position:absolute;right:-8px;top:-15px;display:flex;align-items:center;gap:3px;background:var(--hl);border:2px solid var(--ink);border-radius:99px;padding:1px 9px 1px 2px;font-family:var(--hand);font-size:15px;line-height:1;animation:popin .3s;color:var(--ink)}
.tag img{width:26px;height:26px;object-fit:cover;object-position:50% 22%;border-radius:50%}
.sheet{position:absolute;left:8px;right:8px;bottom:0;background:var(--paper);border:2.5px solid var(--ink);border-bottom:0;border-radius:26px 30px 0 0;box-shadow:0 -6px 24px rgba(35,35,35,.16);padding:18px 18px calc(18px + env(safe-area-inset-bottom,0px));transform:translateY(105%);transition:transform .45s cubic-bezier(.2,.9,.3,1.05);z-index:5;max-height:75%;overflow:auto;display:flex;flex-direction:column;gap:12px}
.sheet.on{transform:none}
.verdict{font-family:var(--display);font-size:24px;margin:0}
.verdict.ok{color:var(--ok)}.verdict.no{color:var(--no)}
.ans{margin:-6px 0 0;font-size:15px;color:var(--ink2)}
.ans b{color:var(--ink)}
.why{background:var(--white);border:2px solid var(--ink);border-radius:var(--wob);padding:12px 14px;font-size:15px;line-height:1.6;word-break:keep-all}
.why b{display:block;font-family:var(--display);font-size:12px;letter-spacing:.06em;color:var(--ink2);margin-bottom:2px}
.todo{font-size:15px;line-height:1.5;word-break:keep-all}
.todo b{font-family:var(--display);font-size:13px;background:linear-gradient(transparent 50%,var(--hl) 50%);margin-right:6px}
.cta{display:block;width:100%;border:2.5px solid var(--ink);border-radius:var(--wob);padding:15px;font-family:var(--display);font-size:18px;background:var(--blue);color:var(--white);box-shadow:3px 4px 0 var(--ink)}
.cta:active{transform:translate(2px,3px);box-shadow:1px 1px 0 var(--ink)}
.cta .fresh{font-family:var(--body);font-size:13px;opacity:.85;margin-left:6px}
.cta.soft{background:var(--white);color:var(--ink)}
.hero{display:flex;flex-direction:column;align-items:center;gap:4px;padding-top:6px}
.hero .uzwrap{width:176px;height:176px}
.end .hero .uzwrap{width:140px;height:140px}
.title{font-family:var(--hand);font-weight:400;font-size:36px;line-height:1.25;text-align:center;margin:0;word-break:keep-all}
.title em{font-style:normal;background:linear-gradient(transparent 55%,var(--hl) 55%)}
.lead{margin:0;text-align:center;font-size:15px;line-height:1.6;color:var(--ink2);word-break:keep-all}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}
.chips span{font-size:12.5px;background:var(--white);border:1.5px solid var(--ink);border-radius:var(--wob);padding:4px 10px}
.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.topic{background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:11px 6px;font-family:var(--display);font-size:14px;line-height:1.3;word-break:keep-all;min-width:0}
.topic small{display:block;font-family:var(--body);font-size:11.5px;color:var(--ink2);margin-top:3px}
.link{border:0;background:none;color:var(--ink2);font-size:13px;text-decoration:underline;align-self:center;padding:4px}
.result{font-family:var(--hand);font-weight:400;font-size:28px;text-align:center;margin:0;line-height:1.35;word-break:keep-all}
.vs{display:flex;justify-content:center;align-items:center;gap:14px;font-family:var(--display)}
.vs div{text-align:center;background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:8px 18px;min-width:96px}
.vs small{display:block;font-family:var(--body);font-size:12px;color:var(--ink2)}
.vs strong{font-size:34px;font-variant-numeric:tabular-nums}
.vs .me strong{color:var(--ok)}.vs .uzs strong{color:var(--blue)}
.vs span{font-family:var(--display);font-size:16px;color:var(--ink2)}
.tips{background:var(--white);border:2px dashed var(--ink);border-radius:var(--wob);padding:12px 16px}
.tips h3{font-family:var(--display);font-size:14px;margin:0 0 4px}
.tips ul{margin:0;padding-left:18px;font-size:14.5px;line-height:1.7}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.ed h2{font-family:var(--display);font-size:22px;margin:0}
.ed ol{margin:0;padding-left:18px;font-size:14px;line-height:1.7;color:var(--ink2)}
.ed textarea{width:100%;box-sizing:border-box;min-height:190px;border:2.5px solid var(--ink);border-radius:14px;padding:10px;font:500 12px/1.5 ui-monospace,Menlo,monospace;resize:vertical;background:var(--white);color:var(--ink)}
.msg{font-size:13.5px;line-height:1.55;border-radius:12px;padding:10px 12px;background:var(--white);border:1.5px solid var(--grid)}
.msg.err{background:var(--no-soft);color:#8a2e24}
.msg.good{background:var(--ok-soft);color:#1f5a37}
.msg ul{margin:4px 0 0;padding-left:18px}
.profile{display:flex;align-items:center;gap:12px;background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:10px 12px;box-shadow:3px 4px 0 rgba(35,35,35,.12)}
.medal{width:58px;height:58px;flex:none}
.medal svg{width:100%;height:100%;overflow:visible}
.pinfo{flex:1;min-width:0;display:flex;flex-direction:column;gap:3px}
.pinfo b{font-family:var(--display);font-size:16px}
.pinfo .pts{font-family:var(--display);font-size:13px;color:var(--ink2);font-variant-numeric:tabular-nums}
.pinfo small{font-size:12px;color:var(--ink2)}
.bar{height:10px;border:2px solid var(--ink);border-radius:99px;background:var(--paper);overflow:hidden}
.bar i{display:block;height:100%;background:var(--ok);border-radius:99px;transition:width 1.2s cubic-bezier(.2,.8,.3,1)}
.inv{display:flex;flex-direction:column;gap:4px;flex:none}
.chip{display:flex;align-items:center;gap:4px;font-family:var(--display);font-size:12px;font-variant-numeric:tabular-nums}
.chip svg{width:22px;height:22px}
.rules{margin:0;text-align:center;font-size:12.5px;color:var(--ink2);line-height:1.6}
.rules b{color:var(--ink)}
.board .pt b{color:var(--ink)}
.board .pt{position:relative}
.plus{position:absolute;left:50%;top:calc(100% + 6px);z-index:3;transform:translateX(-50%);background:var(--white);border:2px solid var(--ok);border-radius:99px;padding:3px 10px;font-family:var(--display);font-size:16px;line-height:1.1;color:var(--ok);white-space:nowrap;pointer-events:none;text-align:center;animation:rise 1.5s ease-out forwards}
.plus small{display:block;font-family:var(--body);font-size:11px;color:var(--ink2)}
.tools{display:flex;justify-content:center;gap:8px}
.tool{display:flex;align-items:center;gap:5px;background:var(--white);border:2px solid var(--ink);border-radius:99px;padding:4px 12px 4px 6px;font-family:var(--display);font-size:13px;font-variant-numeric:tabular-nums}
.tool svg{width:24px;height:24px}
.tool[disabled]{opacity:.38;cursor:default}
.tool.on[disabled]{opacity:1}
.tool.on{background:var(--hl);animation:pulse 1s ease-in-out infinite}
.earn{background:var(--white);border:2.5px solid var(--ink);border-radius:var(--wob);padding:12px 14px;display:flex;flex-direction:column;gap:6px;font-size:14px}
.earn .ln{display:flex;justify-content:space-between;color:var(--ink2);font-variant-numeric:tabular-nums}
.earn .ln b{color:var(--ink)}
.earn .sum{display:flex;justify-content:space-between;align-items:baseline;border-top:2px dashed var(--grid);padding-top:6px;font-family:var(--display)}
.earn .sum strong{font-size:24px;color:var(--ok);font-variant-numeric:tabular-nums}
.gift{display:flex;align-items:center;gap:10px;background:var(--hl);border:2.5px solid var(--ink);border-radius:var(--wob);padding:10px 12px;font-family:var(--display);font-size:15px;animation:popin .5s both}
.gift svg{width:34px;height:34px;flex:none}
.gift small{display:block;font-family:var(--body);font-size:12px;color:var(--ink2)}
.gift.lv{background:var(--ok-soft)}
@keyframes rise{0%{opacity:0;transform:translate(-50%,8px) scale(.7)}18%{opacity:1;transform:translate(-50%,0) scale(1.12)}30%{transform:translate(-50%,0) scale(1)}80%{opacity:1}100%{opacity:0;transform:translate(-50%,-6px)}}
@keyframes pulse{50%{transform:scale(1.06)}}
#fx{position:fixed;top:0;left:50%;transform:translateX(-50%);width:min(440px,100%);height:100%;pointer-events:none;z-index:4}
/* ---------- 넓은 화면: 같은 링크로 태블릿 · PC · 교실 TV ---------- */
.split,.col{display:contents}
@media (min-width:640px){
  #app{max-width:680px}
  .screen{padding:20px 28px 28px;gap:14px}
  .note h2{font-size:24px}
  .opt{font-size:18px}
  .uzwrap{width:190px;height:190px}
  .bubble{font-size:20px}
}
@media (min-width:960px){
  #app{max-width:1240px}
  .screen{padding:24px 40px 32px;gap:18px}
  .top img{height:32px}
  .split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:36px;align-items:start}
  .col{display:flex;flex-direction:column;gap:16px;min-width:0}
  .start .hero .uzwrap{width:300px;height:300px}
  .start .title{font-size:58px}
  .start .lead{font-size:18px}
  .start .split,.end .split{align-items:center;margin-block:auto}
  .topic{font-size:17px;padding:16px 8px}
  .topic small{font-size:13px}
  .cta{font-size:22px;padding:18px}
  .profile{padding:14px 18px}
  .medal{width:72px;height:72px}
  .pinfo b{font-size:19px}
  /* 문제 화면: 왼쪽 우짜니, 오른쪽 쌤의 문제와 보기 */
  .play{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);column-gap:40px;row-gap:16px;
    grid-template-areas:"top top" "board note" "stage note" "stage tools" "stage opts";grid-template-rows:auto auto auto auto 1fr;align-items:start}
  .play>.top{grid-area:top}.play>.board{grid-area:board;align-self:end}.play>.note{grid-area:note}
  .play>.stage{grid-area:stage;flex-direction:column;align-items:center;justify-content:flex-start;gap:14px;min-height:0;padding-top:8px}
  .play>.tools{grid-area:tools;justify-content:flex-start}.play>.opts{grid-area:opts}
  .play .uzwrap{width:300px;height:300px}
  .play .bubble{align-self:center;max-width:92%;font-size:26px;padding:14px 20px;min-height:60px}
  .play .bubble:after{left:50%;top:auto;bottom:-20px;margin-left:-8px;margin-top:0;transform:rotate(-90deg)}
  .play .stage{flex-direction:column-reverse}
  .board{font-size:17px;gap:12px}
  .board span{padding:7px 16px}
  .note{padding:26px 26px 22px}
  .note .who{font-size:14px}
  .note h2{font-size:34px}
  .hint{font-size:19px}
  .tool{font-size:15px;padding:6px 16px 6px 8px}
  .tool svg{width:28px;height:28px}
  .opts{gap:14px}
  .opt{font-size:23px;padding:18px 18px 18px 60px}
  .opt:before{width:32px;height:32px;margin-top:-17px;font-size:16px;line-height:29px;left:16px}
  .ox .opt{font-size:110px;padding:26px 0 20px}
  .tag{font-size:18px;top:-18px}
  .tag img{width:34px;height:34px}
  .sheet{left:calc(50% - 380px);right:calc(50% - 380px);padding:26px 32px 30px;gap:16px}
  .verdict{font-size:32px}.ans{font-size:18px}.why{font-size:18px}.todo{font-size:18px}.todo b{font-size:15px}
  .dots i{width:15px;height:15px}
  .plus{font-size:20px}
  /* 결과 화면 */
  .end .hero .uzwrap{width:260px;height:260px}
  .end .result{font-size:38px}
  .vs strong{font-size:44px}
  .ed{max-width:760px;margin:0 auto;width:100%}
}

@keyframes sway{0%,100%{transform:rotate(-3deg)}50%{transform:rotate(3deg) translateY(-3px)}}
@keyframes jump{0%{transform:none}30%{transform:translateY(-34px) scale(1.05,.95)}55%{transform:translateY(0) scale(1.08,.9)}75%{transform:translateY(-10px)}100%{transform:none}}
@keyframes shake{0%,100%{transform:none}20%{transform:translateX(-10px) rotate(-5deg)}40%{transform:translateX(9px) rotate(4deg)}60%{transform:translateX(-6px)}80%{transform:translateX(4px)}}
@keyframes spin{0%{transform:scale(.9)}50%{transform:scale(1.12) rotate(-12deg)}100%{transform:none}}
@keyframes faint{0%{transform:none}30%{transform:rotate(-8deg)}100%{transform:rotate(78deg) translate(10px,14px)}}
@keyframes popin{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.08);opacity:1}100%{transform:none}}
@keyframes fade{0%{opacity:0}100%{opacity:1}}
@keyframes fly{0%{transform:translate(0,0) scale(1);opacity:1}100%{transform:translate(var(--x),var(--y)) scale(.4);opacity:0}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media (max-width:360px){.note h2{font-size:19px}.uzwrap{width:136px;height:136px}.bubble{font-size:16px}}