: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:#0bb5a2;
  --accent-dark:#078a7b; --pop:#ffcf2e;
  --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)}
.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}
.home{font-size:13px;color:var(--ink-2);text-decoration:none}
.home:hover{color:var(--ink)}
.brand-title{font-size:17px;font-weight:700;letter-spacing:-.01em}
.btn{height:36px;padding:0 14px;background:transparent;border:1px solid var(--line-2);border-radius:999px;font-size:13px;cursor:pointer}
.btn:hover{background:var(--hover)}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.text-input{height:40px;padding:0 12px;background:var(--surface);border:1px solid var(--line-2);border-radius:8px;font:inherit;font-size:14px;color:var(--ink)}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 짝맞추기 ---------- */
.main{flex:1;width:100%;max-width:760px;margin:0 auto;padding:28px 28px 48px;display:flex;flex-direction:column;gap:16px}
.controls{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.seg{display:flex;background:var(--track);border-radius:999px;padding:4px;gap:2px}
.seg-btn{height:34px;padding:0 14px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.seg-btn span{font-family:var(--mono);font-size:11px;opacity:.7;margin-left:2px}
.seg-btn:hover{color:var(--ink)}
.seg-btn.is-active{background:var(--accent);color:#fff;font-weight:500;box-shadow:0 2px 6px rgba(11,181,162,.35)}
.rule{margin:0;font-size:13px;color:var(--muted)}

.hud{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}
.hud-item{display:flex;flex-direction:column;gap:4px;padding:12px 14px;background:var(--panel);border:1px solid var(--line);border-radius:14px;min-width:0}
.hud-item b{font-family:var(--mono);font-size:24px;font-weight:500;letter-spacing:-.02em;line-height:1.1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hud-item small{font-size:14px;color:var(--muted)}
.hud-best{background:var(--ink);border-color:var(--ink);color:#fff}
.hud-best .mono-label{color:#a9a69e}
.hud-best b{font-size:24px}
.hud-best small{color:#a9a69e}

.board-wrap{position:relative}
.board{display:grid;grid-template-columns:repeat(var(--cols,4),minmax(0,1fr));gap:var(--gap,12px);margin:0 auto;width:100%;max-width:var(--max,520px);perspective:1000px}
.card{position:relative;aspect-ratio:3/4;padding:0;perspective:900px;background:none;border:none;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;animation:deal .4s cubic-bezier(.2,1.2,.4,1) both;animation-delay:calc(var(--i) * 25ms)}
.card:focus-visible{outline:3px solid var(--ink);outline-offset:3px;border-radius:14px}
.card-inner{position:absolute;inset:0;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.3,1.3,.5,1)}
.card.is-open .card-inner,.card.is-matched .card-inner{transform:rotateY(180deg)}
.face{position:absolute;inset:0;border-radius:var(--radius,14px);backface-visibility:hidden;-webkit-backface-visibility:hidden;display:grid;place-items:center}
.face--back{background:
  radial-gradient(circle at 50% 50%,rgba(255,255,255,.22) 0 18%,transparent 19%),
  repeating-linear-gradient(45deg,rgba(255,255,255,.1) 0 6px,transparent 6px 12px),
  linear-gradient(150deg,#14cdb8,var(--accent-dark));
  box-shadow:0 3px 0 #06705f,0 6px 14px rgba(7,138,123,.25);color:#fff;font-family:var(--mono);font-size:clamp(16px,4vw,26px);font-weight:500}
.card:hover .face--back{filter:brightness(1.06)}
.face--front{transform:rotateY(180deg);background:#fff;border:2px solid var(--line);box-shadow:0 3px 0 var(--line-2);font-size:var(--emoji,clamp(30px,8vw,52px));line-height:1}
.card.is-matched{cursor:default}
.card.is-matched .face--front{border-color:var(--accent);background:#e9fbf8;box-shadow:0 3px 0 var(--accent)}
.card.is-matched .face--front .emo{animation:matched .5s ease .2s}
.card.is-miss .face--front{border-color:#ff6b5a;background:#fff1ef;animation:wiggle .4s ease .25s}
@keyframes deal{from{opacity:0;transform:translateY(16px) scale(.9)}to{opacity:1;transform:none}}
@keyframes matched{40%{transform:scale(1.3) rotate(-8deg)}}
@keyframes wiggle{25%{transform:rotateY(180deg) rotate(-4deg)}75%{transform:rotateY(180deg) rotate(4deg)}}
.emo{display:inline-block}

/* 승리 */
.win{position:absolute;inset:-8px;display:grid;place-items:center;background:rgba(245,244,240,.78);backdrop-filter:blur(3px);border-radius:20px;z-index:5;animation:fade .3s ease}
.win-card{position:relative;overflow:hidden;width:min(360px,100%);padding:30px 24px 24px;background:var(--panel);border:1px solid var(--line);border-radius:22px;text-align:center;box-shadow:0 24px 60px rgba(40,36,28,.18);animation:rise .45s cubic-bezier(.2,1.3,.4,1)}
.win-emoji{font-size:48px;display:block;line-height:1.1}
.win-title{margin:8px 0 4px;font-size:24px;font-weight:700;letter-spacing:-.02em}
.win-desc{margin:0;font-size:14px;color:var(--ink-2)}
.win-desc .new{color:var(--accent-dark);font-weight:700}
.win-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:18px 0}
.win-stats div{display:flex;flex-direction:column;gap:2px;padding:12px;border-radius:12px;background:var(--panel-soft)}
.win-stats b{font-family:var(--mono);font-size:26px;font-weight:500}
.win-btn{width:100%;height:48px;background:var(--accent);color:#fff;border:none;border-radius:999px;font-size:16px;font-weight:700;cursor:pointer;box-shadow:0 4px 0 var(--accent-dark);transition:transform .08s,box-shadow .08s}
.win-btn:active{transform:translateY(4px);box-shadow:0 0 0 var(--accent-dark)}
.confetti i{position:absolute;top:-12px;width:8px;height:14px;border-radius:2px;background:var(--accent);animation:fall 1.6s ease-in forwards}
.confetti i:nth-child(1){left:8%;background:var(--pop);animation-delay:.05s}
.confetti i:nth-child(2){left:18%;background:#ff5d8f;animation-delay:.3s}
.confetti i:nth-child(3){left:30%;animation-delay:.15s}
.confetti i:nth-child(4){left:42%;background:#5d7bff;animation-delay:.45s}
.confetti i:nth-child(5){left:52%;background:var(--pop);animation-delay:.1s}
.confetti i:nth-child(6){left:63%;background:#ff5d8f;animation-delay:.35s}
.confetti i:nth-child(7){left:72%;animation-delay:.2s}
.confetti i:nth-child(8){left:82%;background:#5d7bff;animation-delay:.05s}
.confetti i:nth-child(9){left:90%;background:var(--pop);animation-delay:.4s}
.confetti i:nth-child(10){left:96%;background:#ff5d8f;animation-delay:.25s}
@keyframes fall{0%{transform:translateY(0) rotate(0);opacity:1}100%{transform:translateY(340px) rotate(540deg);opacity:0}}
@keyframes fade{from{opacity:0}to{opacity:1}}
@keyframes rise{from{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:none}}

@media (max-width:640px){
  .main{padding:16px 16px 36px;gap:12px}
  .controls{flex-direction:column;align-items:stretch}
  .seg-btn{flex:1;padding:0 6px;font-size:12px}
  .rule{font-size:12px;text-align:center}
  .hud{grid-template-columns:repeat(4,minmax(0,1fr));gap:6px}
  .hud-item{padding:9px 8px;border-radius:12px}
  .hud-item .mono-label{font-size:9px;letter-spacing:.06em}
  .hud-item b{font-size:17px}
  .hud-best b{font-size:17px}
  .hud-best small{display:block;font-size:10px;margin-top:2px}
  .hud-item small{font-size:11px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-delay:0s !important;transition-duration:.01ms !important}
}

/* 다크 모드 (인쇄는 라이트 그대로) */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#141318; --surface:#1a1920; --panel:#1f1e26; --panel-soft:#24232c;
    --ink:#ecebf0; --ink-hover:#ffffff; --ink-2:#c9c7d1; --sub:#a09eab; --muted:#8a8895;
    --line:#2e2d36; --line-2:#393843; --line-3:#26252d; --hover:#2a2932; --soft:#26252d; --track:#34333d;
    --accent:#2fd3bf; --accent-soft:rgba(47,211,191,.16);
  }
  :root[data-theme="dark"] .btn--solid,
  :root[data-theme="dark"] .seg-btn.is-active,
  :root[data-theme="dark"] .win-btn{color:var(--bg)}
  :root[data-theme="dark"] .seg-btn.is-active{box-shadow:0 2px 6px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .hud-best{background:var(--panel-soft);border-color:var(--accent);color:var(--ink)}
  :root[data-theme="dark"] .hud-best .mono-label,
  :root[data-theme="dark"] .hud-best small{color:var(--accent)}
  :root[data-theme="dark"] .face--back{background:radial-gradient(circle at 50% 50%,rgba(255,255,255,.2) 0 18%,transparent 19%),repeating-linear-gradient(45deg,rgba(255,255,255,.08) 0 6px,transparent 6px 12px),linear-gradient(150deg,#11a897,#066e62);box-shadow:0 3px 0 #04574d,0 6px 14px rgba(0,0,0,.35)}
  :root[data-theme="dark"] .face--front{background:var(--panel-soft)}
  :root[data-theme="dark"] .card.is-matched .face--front{background:#183a36}
  :root[data-theme="dark"] .card.is-miss .face--front{background:#3d2220}
  :root[data-theme="dark"] .win{background:rgba(20,19,24,.78)}
  :root[data-theme="dark"] .win-card{box-shadow:0 24px 60px rgba(0,0,0,.5)}
  :root[data-theme="dark"] .win-desc .new{color:var(--accent)}
}