:root{
  --bg:#f5f4f0; --surface:#fbfbf9; --panel:#ffffff; --panel-soft:#f7f6f2;
  --ink:#1c1c1a; --ink-hover:#3a3935; --ink-2:#55534d; --sub:#7a776f; --muted:#8a877f;
  --line:#e3e1db; --line-2:#dcdad3; --line-3:#efeee9; --hover:#efeee9; --soft:#f3f2ee; --track:#ebe9e3;
  --accent:#0f9fb3; /* 아쿠아 */
  --accent-soft:rgba(15,159,179,.12);
  --sheet:#dff2f4; --sheet-2:#cfeaee; --sheet-line:rgba(15,159,179,.18);
  --bub-hi:rgba(255,255,255,.95); --bub-mid:rgba(214,240,244,.85); --bub-edge:rgba(120,190,200,.55); --bub-shadow:rgba(30,110,125,.22);
  --pop-a:rgba(170,215,222,.5); --pop-b:rgba(140,195,205,.45);
  --font:"IBM Plex Sans KR",sans-serif; --mono:"JetBrains Mono",monospace;
}
*{box-sizing:border-box}
[hidden]{display:none !important}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);-webkit-font-smoothing:antialiased}
button{font:inherit;color:inherit}
.mono-label{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.app{min-height:calc(100vh - 48px);display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 28px;border-bottom:1px solid var(--line);background:var(--surface);flex-wrap:wrap}
.brand{display:flex;align-items:baseline;gap:14px;min-width:0;flex-wrap:wrap}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em;margin:0}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap;display:inline-flex;align-items:center;justify-content:center;gap:6px}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn[aria-pressed="false"]{color:var(--muted)}
button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.hint,.note{font-size:12px;color:var(--muted);line-height:1.6;margin:0}
.hint kbd{font-family:var(--mono);font-size:10px;padding:1px 5px;border:1px solid var(--line-2);border-radius:4px}
.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{height:30px;padding:0 14px;border:none;background:transparent;border-radius:999px;font-size:13px;color:var(--sub);cursor:pointer;white-space:nowrap}
.seg-btn.is-active{background:var(--accent);color:#fff;font-weight:500}

.wrap{width:100%;max-width:1000px;margin:0 auto;padding:24px 28px 48px;display:flex;flex-direction:column;gap:16px}

/* HUD */
.hud{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:16px;overflow:hidden}
.hud>div{background:var(--panel);padding:12px 16px;display:flex;flex-direction:column;gap:2px;min-width:0}
.hud-k{font-size:12px;color:var(--sub)}
.hud b{font-family:var(--mono);font-size:22px;font-weight:600;white-space:nowrap;letter-spacing:-.02em}
.hud-main{background:var(--accent) !important;color:#fff}
.hud-main .hud-k{color:rgba(255,255,255,.8)}
.hud-v{display:flex;align-items:baseline;gap:6px}
.hud-v b{font-size:32px;font-weight:700}
.hud-v small{font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.8)}

/* 무대 */
.stage{display:flex;flex-direction:column;gap:10px}
.controls{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.controls .btn--solid{margin-left:auto}
.switch{display:inline-flex;align-items:center;gap:8px;font-size:13px;cursor:pointer;user-select:none}
.switch input{position:absolute;opacity:0;width:1px;height:1px}
.switch-ui{width:38px;height:22px;border-radius:999px;background:var(--track);position:relative;transition:background .2s}
.switch-ui::after{content:"";position:absolute;left:3px;top:3px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:transform .2s}
.switch input:checked+.switch-ui{background:var(--accent)}
.switch input:checked+.switch-ui::after{transform:translateX(16px)}
.switch input:focus-visible+.switch-ui{outline:2px solid var(--accent);outline-offset:2px}

.sheet-wrap{border-radius:22px;padding:10px;background:var(--panel);border:1px solid var(--line);box-shadow:0 16px 40px rgba(20,90,100,.08);overflow:hidden}
.sheet{position:relative;height:440px;border-radius:14px;overflow:hidden;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;cursor:pointer;outline:none;
  background:
    linear-gradient(115deg,rgba(255,255,255,0) 30%,rgba(255,255,255,.45) 42%,rgba(255,255,255,0) 55%),
    linear-gradient(180deg,var(--sheet),var(--sheet-2));}
.sheet:focus-visible{box-shadow:inset 0 0 0 3px var(--accent)}
.bubbles{position:absolute;inset:0;transition:transform .45s cubic-bezier(.6,0,.3,1),opacity .45s}
.bubbles.is-out{transform:translateX(-105%);opacity:0}
.bubbles.is-in{transform:translateX(105%);opacity:0;transition:none}
.bub{position:absolute;border-radius:50%;pointer-events:auto;
  background:radial-gradient(circle at 34% 30%,var(--bub-hi) 0 14%,var(--bub-mid) 34%,rgba(200,232,238,.5) 70%,var(--bub-edge) 100%);
  box-shadow:inset -3px -5px 8px rgba(80,160,175,.22),inset 2px 3px 4px rgba(255,255,255,.7),0 3px 6px var(--bub-shadow);
  transition:transform .08s ease}
.bub::after{content:"";position:absolute;inset:-2px;border-radius:50%;border:2px solid var(--accent);opacity:0;pointer-events:none}
.bub.is-popped{background:
    conic-gradient(from 20deg,var(--pop-a),var(--pop-b),var(--pop-a),var(--pop-b),var(--pop-a));
  box-shadow:inset 0 1px 3px rgba(40,110,120,.25);transform:scale(.86);opacity:.75}
.bub.is-popped::after{animation:ring .35s ease-out}
.bub.is-cursor{outline:3px solid var(--accent);outline-offset:3px}
.bub.is-grow{animation:grow .6s ease-out}
@keyframes ring{from{opacity:.8;transform:scale(.6)}to{opacity:0;transform:scale(1.6)}}
@keyframes grow{from{transform:scale(.6);opacity:.6}to{transform:scale(1);opacity:1}}
.puff{position:absolute;pointer-events:none;font-family:var(--mono);font-weight:700;font-size:12px;color:var(--accent);animation:puff .5s ease-out forwards;transform:translate(-50%,-50%)}
@keyframes puff{to{opacity:0;transform:translate(-50%,-160%)}}

.clear{position:absolute;inset:0;display:grid;place-items:center;background:rgba(15,60,70,.18);backdrop-filter:blur(2px);animation:fade .25s ease;padding:16px}
@keyframes fade{from{opacity:0}to{opacity:1}}
.clear-card{background:var(--panel);border-radius:20px;padding:22px 24px;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;box-shadow:0 20px 50px rgba(0,0,0,.18);max-width:100%}
.clear-big{font-size:28px;letter-spacing:-.02em}
.clear-sub{margin:0 0 8px;font-size:14px;color:var(--ink-2);word-break:keep-all}
.clear-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}

/* 공유 카드 */
.share{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:16px;align-items:stretch}
.share-card{border-radius:22px;padding:22px 24px;color:#fff;background:
  radial-gradient(circle at 85% 20%,rgba(255,255,255,.35) 0 7%,transparent 7.5%),
  radial-gradient(circle at 70% 70%,rgba(255,255,255,.22) 0 10%,transparent 10.5%),
  radial-gradient(circle at 95% 85%,rgba(255,255,255,.18) 0 6%,transparent 6.5%),
  linear-gradient(140deg,#13a7bb,#0b6f8a);display:flex;flex-direction:column;gap:8px;box-shadow:0 18px 40px rgba(11,111,138,.2)}
.share-card .mono-label{color:rgba(255,255,255,.75)}
.sc-top{display:flex;justify-content:space-between;align-items:center}
.sc-emoji{font-size:26px}
.sc-title{font-size:20px;font-weight:700;letter-spacing:-.01em;word-break:keep-all}
.sc-num{display:flex;align-items:baseline;gap:6px}
.sc-num b{font-family:var(--mono);font-size:44px;font-weight:700;letter-spacing:-.03em}
.sc-num small{font-size:15px;opacity:.85}
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:4px 0 0}
.sc-grid div{background:rgba(255,255,255,.15);border-radius:12px;padding:8px 12px;min-width:0}
.sc-grid dt{font-size:11px;opacity:.85}
.sc-grid dd{margin:2px 0 0;font-family:var(--mono);font-size:16px;font-weight:700;white-space:nowrap}
.share-side{display:flex;flex-direction:column;justify-content:space-between;gap:12px;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:20px 22px}
.share-actions{display:flex;gap:8px;flex-wrap:wrap}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);background:var(--ink);color:#fff;padding:10px 18px;border-radius:999px;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50}
.toast.is-show{opacity:1;transform:translate(-50%,0)}

@media (max-width:760px){
  .share{grid-template-columns:1fr}
}
@media (max-width:640px){
  .topbar{padding:14px 16px}
  .wrap{padding:16px 16px 36px;gap:12px}
  .hud{grid-template-columns:repeat(3,1fr)}
  .hud-main{grid-column:1/-1;flex-direction:row !important;align-items:baseline;justify-content:space-between}
  .hud b{font-size:17px}
  .hud-v b{font-size:28px}
  .hud>div{padding:10px 12px}
  .sheet{height:380px}
  .sheet-wrap{padding:6px;border-radius:18px}
  .controls .btn--solid{margin-left:0}
  .btn-t{display:none}
  .btn--icon{width:36px;padding:0}
  .sc-grid dd{font-size:14px}
  .sc-num b{font-size:38px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#121619; --surface:#171c1f; --panel:#1c2226; --panel-soft:#212a2e;
    --ink:#e8eef0; --ink-hover:#ffffff; --ink-2:#c3cdd1; --sub:#9aa7ac; --muted:#869398;
    --line:#2a3337; --line-2:#354045; --line-3:#232b2f; --hover:#263034; --soft:#232c30; --track:#334046;
    --accent:#4fd2e2; --accent-soft:rgba(79,210,226,.16);
    --sheet:#173038; --sheet-2:#12262d; --sheet-line:rgba(79,210,226,.18);
    --bub-hi:rgba(230,250,255,.75); --bub-mid:rgba(90,150,165,.55); --bub-edge:rgba(120,200,215,.5); --bub-shadow:rgba(0,0,0,.45);
    --pop-a:rgba(70,120,132,.45); --pop-b:rgba(50,95,108,.45);
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast,:root[data-theme="dark"] .seg-btn.is-active{color:var(--bg)}
  :root[data-theme="dark"] .hud-main{background:#137f90 !important}
  :root[data-theme="dark"] .sheet-wrap{box-shadow:0 16px 40px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .sheet{background:linear-gradient(115deg,rgba(255,255,255,0) 30%,rgba(255,255,255,.05) 42%,rgba(255,255,255,0) 55%),linear-gradient(180deg,var(--sheet),var(--sheet-2))}
  :root[data-theme="dark"] .bub{box-shadow:inset -3px -5px 8px rgba(0,0,0,.25),inset 2px 3px 4px rgba(255,255,255,.18),0 3px 6px var(--bub-shadow)}
  :root[data-theme="dark"] .clear{background:rgba(0,0,0,.45)}
  :root[data-theme="dark"] .share-card{background:
    radial-gradient(circle at 85% 20%,rgba(255,255,255,.22) 0 7%,transparent 7.5%),
    radial-gradient(circle at 70% 70%,rgba(255,255,255,.14) 0 10%,transparent 10.5%),
    radial-gradient(circle at 95% 85%,rgba(255,255,255,.12) 0 6%,transparent 6.5%),
    linear-gradient(140deg,#0e7f8f,#08485a);box-shadow:0 18px 40px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .switch-ui::after{background:#e8eef0}
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .seg-btn.is-active,:root[data-theme="dark"] .chip[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--bg)}
  :root[data-theme="dark"] .btn--solid:hover:not(:disabled){background:var(--accent);filter:brightness(1.1)}
}