/* 두리번수학 스타일 — 디자이너 수정 구역: 맨 위 :root 색·글꼴 */
:root{
  --sky:#C9E9FF; --sky-deep:#8FCBFF; --meadow:#9BDB7C; --meadow-deep:#6FBF5A;
  --sun:#FFD24A; --coral:#FF7B6B; --ink:#26324F; --ink-soft:#5B6788;
  --cloud:#FFFFFF; --card:#FFFFFF; --path:#F3E2B3; --pond:#7FC3FF;
  --line:rgba(38,50,79,.14);
  --display:'Jua','Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  --body:'Gowun Dodum','Apple SD Gothic Neo','Malgun Gothic',sans-serif;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --sky:#2E3A66; --sky-deep:#1F2A4F; --meadow:#4E8F5C; --meadow-deep:#3A7147;
    --ink:#F2F5FF; --ink-soft:#B9C2DD; --cloud:#3B4776; --card:#2F3A63; --path:#8A7A55;
    --line:rgba(242,245,255,.16);
  }
}
:root[data-theme="dark"]{
  --sky:#2E3A66; --sky-deep:#1F2A4F; --meadow:#4E8F5C; --meadow-deep:#3A7147;
  --ink:#F2F5FF; --ink-soft:#B9C2DD; --cloud:#3B4776; --card:#2F3A63; --path:#8A7A55;
  --line:rgba(242,245,255,.16);
}
html{scroll-padding-top:env(safe-area-inset-top,0px);height:100%}
*,*::before,*::after{box-sizing:inherit}
body{
  margin:0;min-height:100%;
  background:linear-gradient(180deg,var(--sky) 0%,var(--sky-deep) 100%);
  color:var(--ink);font-family:var(--body);font-size:17px;line-height:1.5;
  -webkit-text-size-adjust:100%;
}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
button:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--sun);outline-offset:3px}
img{max-width:100%}
.app{max-width:480px;margin:0 auto;min-height:100dvh;position:relative}
.screen{display:none;min-height:100dvh;padding:20px 20px 32px;flex-direction:column}
.screen.on{display:flex}
h1,h2,h3{font-family:var(--display);font-weight:400;margin:0;line-height:1.2}
h1{font-size:44px;letter-spacing:-.5px}
h2{font-size:30px}
h3{font-size:22px}
p{margin:0}
.muted{color:var(--ink-soft)}
.grow{flex:1}
.center{text-align:center}
.stack>*+*{margin-top:14px}

/* buttons */
.btn{
  display:flex;align-items:center;justify-content:center;gap:10px;width:100%;
  min-height:64px;padding:14px 22px;border-radius:32px;
  font-family:var(--display);font-size:24px;
  background:var(--sun);color:#26324F;box-shadow:0 6px 0 #D9AC1C;
  transition:transform .08s ease,box-shadow .08s ease;
}
.btn:active{transform:translateY(4px);box-shadow:0 2px 0 #D9AC1C}
.btn.coral{background:var(--coral);color:#fff;box-shadow:0 6px 0 #C94E40}
.btn.coral:active{box-shadow:0 2px 0 #C94E40}
.btn.quiet{background:var(--card);color:var(--ink);box-shadow:0 6px 0 var(--line);font-size:20px;min-height:56px}
.btn.quiet:active{box-shadow:0 2px 0 var(--line)}
.btn.small{min-height:48px;font-size:18px;width:auto;padding:8px 18px;border-radius:24px}
.btn[disabled]{opacity:.5;cursor:default}
.textbtn{font-family:var(--body);color:var(--ink-soft);text-decoration:underline;font-size:15px;padding:10px}
.row{display:flex;gap:12px;align-items:center}
.row.split{justify-content:space-between}
.iconbtn{
  width:52px;height:52px;border-radius:50%;background:var(--card);
  display:flex;align-items:center;justify-content:center;font-size:24px;
  box-shadow:0 3px 0 var(--line);
}

/* mascot bubble */
.pengu{display:flex;gap:12px;align-items:flex-end}
.pengu svg{width:84px;height:84px;flex:none}
.bubble{
  background:var(--card);border-radius:22px 22px 22px 6px;padding:14px 18px;
  font-family:var(--display);font-size:21px;line-height:1.3;position:relative;flex:1;
}

/* choice cards */
.choice{
  display:flex;flex-direction:column;align-items:center;gap:8px;
  background:var(--card);border-radius:28px;padding:22px 12px;
  font-family:var(--display);font-size:24px;width:100%;
  box-shadow:0 6px 0 var(--line);transition:transform .08s;
}
.choice .big{font-size:56px;line-height:1}
.choice:active{transform:translateY(3px)}
.choice.sel{outline:4px solid var(--sun)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{
  padding:10px 16px;border-radius:20px;background:var(--card);
  border:2px solid transparent;font-size:16px;
}
.chip.sel{border-color:var(--coral);background:color-mix(in srgb,var(--coral) 12%,var(--card))}
.field label{display:block;font-size:15px;color:var(--ink-soft);margin-bottom:6px}
.field input{
  width:100%;min-height:52px;border-radius:16px;border:2px solid var(--line);
  padding:10px 14px;font:inherit;background:var(--card);color:var(--ink);
}
.q{background:var(--card);border-radius:20px;padding:16px}
.q .qt{font-size:17px;margin-bottom:10px}

/* village */
.village{
  position:relative;border-radius:28px;overflow:hidden;
  background:linear-gradient(180deg,transparent 0 38%,var(--meadow) 38%);
}
.village svg{display:block;width:100%;height:auto}
.plot{cursor:pointer}
.plot .locked{display:none}
.plot.is-locked .built{display:none}
.plot.is-locked .locked{display:block}
.plot .built{transform-origin:center bottom;transform-box:fill-box}
.plot.pop .built{animation:pop .7s cubic-bezier(.2,1.4,.4,1)}
@keyframes pop{0%{transform:scale(.2)}60%{transform:scale(1.12)}100%{transform:scale(1)}}
.levelbadge{
  display:inline-flex;align-items:center;gap:6px;background:var(--card);
  border-radius:20px;padding:6px 12px;font-family:var(--display);font-size:17px;
}
.starbar{
  display:flex;align-items:center;gap:8px;background:var(--card);border-radius:22px;
  padding:10px 16px;font-family:var(--display);font-size:22px;
}

/* mission */
.hero-emoji{font-size:72px;line-height:1.1;text-align:center;margin-bottom:14px}
.hints{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.hint{background:var(--card);border-radius:20px;padding:14px 8px;text-align:center}
.hint .e{font-size:40px;line-height:1.1}
.hint .t{font-size:15px;margin-top:6px}
.dots{display:flex;gap:10px;justify-content:center;align-items:center}
.dot{width:22px;height:22px;border-radius:50%;background:var(--card);border:3px solid var(--line)}
.dot.f{background:var(--sun);border-color:var(--sun)}
.counter{font-family:var(--display);font-size:22px}
.preview{
  border-radius:24px;overflow:hidden;background:var(--card);aspect-ratio:3/4;
  display:flex;align-items:center;justify-content:center;
}
.preview img{width:100%;height:100%;object-fit:cover}
.spin{animation:spin 1.4s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.materials{display:flex;gap:8px;justify-content:center;font-size:34px;min-height:44px}
.materials span{opacity:.25}
.materials span.got{opacity:1;animation:pop .5s cubic-bezier(.2,1.4,.4,1)}
.bigword{font-family:var(--display);font-size:40px;text-align:center;line-height:1.15}
.confetti{font-size:64px;text-align:center;line-height:1}

.vh{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;pointer-events:none}
.cam{position:relative;border-radius:24px;overflow:hidden;background:#000;aspect-ratio:3/4}
.cam video{width:100%;height:100%;object-fit:cover;display:block}
.cam .guide{position:absolute;inset:12% 14%;border:4px dashed rgba(255,255,255,.85);border-radius:24px;pointer-events:none}
.cam .cap{position:absolute;top:12px;left:0;right:0;text-align:center;color:#fff;font-family:var(--display);font-size:20px;text-shadow:0 1px 4px rgba(0,0,0,.6)}
.shutter{width:84px;height:84px;border-radius:50%;background:#fff;border:6px solid var(--sun);box-shadow:0 6px 0 #D9AC1C;font-size:34px}
.shutter:active{transform:translateY(4px);box-shadow:0 2px 0 #D9AC1C}

/* parent */
.card{background:var(--card);border-radius:22px;padding:18px}
.stat{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.stat .n{font-family:var(--display);font-size:30px}
.stat .l{font-size:13px;color:var(--ink-soft)}
.bar{height:10px;border-radius:5px;background:var(--line);overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:var(--meadow-deep)}
.list{display:flex;flex-direction:column;gap:8px}
.list .it{display:flex;justify-content:space-between;gap:10px;font-size:15px;padding:8px 0;border-bottom:1px solid var(--line)}
.list .it:last-child{border-bottom:0}
.plus{
  background:linear-gradient(135deg,#FFE28A,#FFB3A7);color:#26324F;border-radius:22px;padding:20px;
}
.plus h3{font-size:24px}
.price{font-family:var(--display);font-size:34px}
.plus ul{margin:10px 0 0;padding-left:18px;font-size:15px}
.gatekeys{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.toast{
  position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom,0px));transform:translateX(-50%);
  background:var(--ink);color:var(--cloud);padding:12px 18px;border-radius:16px;font-size:15px;
  opacity:0;pointer-events:none;transition:opacity .25s;max-width:90vw;text-align:center;
}
.toast.show{opacity:1}
.tag{display:inline-block;font-size:12px;padding:3px 8px;border-radius:10px;background:var(--line);color:var(--ink-soft)}
@media (prefers-reduced-motion: reduce){
  .plot.pop .built,.materials span.got{animation:none}
  .spin{animation:none}
}