: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:#0f8b7d;
  --wall:#efede7;
  --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)}
.mono{font-family:var(--mono)}
.app{min-height:100vh;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{margin:0;font-size:17px;font-weight:700;letter-spacing:-.01em}
.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}
.btn:hover{background:var(--hover)}
.btn[aria-pressed="true"]{background:var(--ink);border-color:var(--ink);color:#fff}
.btn--accent{background:var(--accent);color:#fff;border:none;font-weight:500}
.btn--accent:hover{background:var(--accent);filter:brightness(1.08)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 갤러리 ---------- */
.gallery{flex:1;padding:36px 28px 56px;background:linear-gradient(var(--wall),#e9e6de)}
.intro{max-width:1180px;margin:0 auto 28px;display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap}
.intro-text{max-width:620px}
.intro-kicker{margin:0 0 8px;font-size:11px;letter-spacing:.16em;color:var(--accent)}
.intro-title{margin:0 0 8px;font-size:clamp(22px,3vw,30px);font-weight:700;letter-spacing:-.025em;line-height:1.3}
.intro-title em{font-style:normal;background:linear-gradient(transparent 62%,rgba(15,139,125,.22) 62%)}
.intro-sub{margin:0;font-size:14px;line-height:1.65;color:var(--ink-2)}
.motion-note{max-width:1180px;margin:-12px auto 20px;font-size:12.5px;color:var(--sub)}

.seg{display:flex;background:rgba(255,255,255,.7);border:1px solid var(--line);border-radius:999px;padding:3px;gap:2px}
.seg-btn{height:32px;padding:0 14px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-size:13px;cursor:pointer;white-space:nowrap}
.seg-btn[aria-checked="true"]{background:var(--ink);color:#fff}

.grid{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:26px}
.card{position:relative;display:flex;flex-direction:column;gap:12px;animation:card-in .5s ease both}
@keyframes card-in{from{opacity:0;transform:translateY(12px)}}
.card-frame{padding:14px;background:#fff;border-radius:4px;box-shadow:0 1px 0 rgba(0,0,0,.04),0 18px 30px -18px rgba(60,45,30,.45);transition:transform .25s ease,box-shadow .25s ease}
.card:hover .card-frame{transform:translateY(-4px);box-shadow:0 1px 0 rgba(0,0,0,.04),0 28px 40px -20px rgba(60,45,30,.5)}
.art-box{container-type:inline-size;aspect-ratio:1;overflow:hidden;background:#ddd;box-shadow:inset 0 0 0 1px rgba(0,0,0,.06)}
.art-host{font-size:12px;font-size:5cqi;width:20em;height:20em}
.art-host > *{font-size:inherit !important}
.card-label{display:flex;align-items:baseline;gap:10px;padding:0 2px}
.card-no{font-family:var(--mono);font-size:11px;color:var(--accent)}
.card-title{font-size:15px;font-weight:700;letter-spacing:-.01em}
.card-tags{margin-left:auto;font-family:var(--mono);font-size:10.5px;color:var(--muted);white-space:nowrap}
.card-open{position:absolute;inset:0;width:100%;border:none;background:transparent;cursor:zoom-in;border-radius:4px;padding:0}
.card-open:focus-visible{outline:3px solid var(--accent);outline-offset:4px}

/* 애니메이션 정지 */
.is-paused .art-host *,.is-paused .art-host *::before,.is-paused .art-host *::after,
.card.is-off .art-host *,.card.is-off .art-host *::before,.card.is-off .art-host *::after{animation-play-state:paused !important}

/* ---------- 뷰어 ---------- */
.viewer{width:min(1100px,calc(100vw - 32px));max-height:calc(100vh - 32px);padding:0;border:none;border-radius:20px;background:#171614;color:#fff;box-shadow:0 40px 100px -20px rgba(0,0,0,.6);overflow:hidden}
.viewer::backdrop{background:rgba(20,18,15,.6);backdrop-filter:blur(4px)}
.viewer[open]{animation:viewer-in .25s ease}
@keyframes viewer-in{from{opacity:0;transform:scale(.97)}}
.viewer-inner{display:flex;flex-wrap:wrap;max-height:calc(100vh - 32px);overflow:auto}
.viewer-stage{flex:1 1 420px;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:28px;background:radial-gradient(80% 70% at 50% 40%,#2a2824,#171614)}
.viewer-art{container-type:inline-size;width:min(100%,460px);aspect-ratio:1;overflow:hidden;border-radius:6px;box-shadow:0 0 0 10px #fff,0 30px 60px -20px rgba(0,0,0,.8)}
.viewer-art .art-host{font-size:5cqi}
.viewer-nav{display:flex;align-items:center;gap:14px;font-size:12px;color:rgba(255,255,255,.6);margin-top:12px}
.nav-btn{width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;cursor:pointer}
.nav-btn:hover{background:rgba(255,255,255,.1)}
.viewer-side{flex:1 1 380px;min-width:0;display:flex;flex-direction:column;gap:14px;padding:26px 26px 24px;border-left:1px solid rgba(255,255,255,.08)}
.viewer-head{display:flex;justify-content:space-between;gap:12px}
.viewer-no{margin:0 0 4px;font-size:11px;letter-spacing:.14em;color:#4fd1c0}
.viewer-title{margin:0 0 6px;font-size:22px;letter-spacing:-.02em}
.viewer-desc{margin:0 0 6px;font-size:13.5px;line-height:1.6;color:rgba(255,255,255,.72)}
.viewer-tech{margin:0;font-size:11px;color:rgba(255,255,255,.45)}
.close-btn{flex-shrink:0;width:36px;height:36px;border-radius:50%;border:1px solid rgba(255,255,255,.18);background:transparent;color:#fff;cursor:pointer;font-size:14px}
.close-btn:hover{background:rgba(255,255,255,.1)}
.tabs{display:flex;gap:4px;border-bottom:1px solid rgba(255,255,255,.1)}
.tab{height:34px;padding:0 14px;border:none;background:transparent;color:rgba(255,255,255,.55);font-family:var(--mono);font-size:12px;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px}
.tab[aria-selected="true"]{color:#fff;border-bottom-color:#4fd1c0}
.code{flex:1;min-height:200px;max-height:46vh;margin:0;padding:14px 16px;overflow:auto;border-radius:12px;background:#0e0e0d;font-family:var(--mono);font-size:12px;line-height:1.65;color:#e8e6df;tab-size:2;white-space:pre}
.code:focus-visible{outline:2px solid #4fd1c0}
.code .t-tag{color:#ff8b7b}.code .t-attr{color:#ffd27a}.code .t-str{color:#9fe28f}
.code .t-sel{color:#7cc7ff}.code .t-prop{color:#c9a7ff}.code .t-num{color:#ffb86b}.code .t-com{color:#6c6a63;font-style:italic}.code .t-at{color:#ff8b7b}
.copy-row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.copy-meta{font-size:11px;color:rgba(255,255,255,.45)}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);padding:10px 16px;border-radius:999px;background:var(--accent);color:#fff;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:1000}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

@media (max-width:640px){
  .gallery{padding:24px 16px 40px}
  .grid{grid-template-columns:1fr 1fr;gap:16px}
  .card-frame{padding:8px}
  .card-label{flex-wrap:wrap;gap:2px 8px}
  .card-title{font-size:13.5px}
  .card-tags{margin-left:0;flex-basis:100%}
  .viewer{width:calc(100vw - 16px);max-height:calc(100vh - 16px);border-radius:16px}
  .viewer-inner{max-height:calc(100vh - 16px)}
  .viewer-stage{padding:22px 16px 16px;flex-basis:100%}
  .viewer-art{width:min(100%,320px)}
  .viewer-side{padding:18px 16px 20px;border-left:none;border-top:1px solid rgba(255,255,255,.08)}
  .code{max-height:40vh;font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  .card,.viewer[open]{animation:none}
  .card-frame,.toast{transition:none}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 밤의 전시장. 작품(.art-box)과 뷰어는 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;
    --wall:#1b1a20;
  }
  :root[data-theme="dark"] .btn[aria-pressed="true"]{color:var(--bg)}
  :root[data-theme="dark"] .gallery{background:linear-gradient(var(--wall),#141318)}
  :root[data-theme="dark"] .intro-kicker,:root[data-theme="dark"] .card-no{color:#3cc4b2}
  :root[data-theme="dark"] .intro-title em{background:linear-gradient(transparent 62%,rgba(60,196,178,.28) 62%)}
  :root[data-theme="dark"] .seg{background:var(--panel)}
  :root[data-theme="dark"] .seg-btn[aria-checked="true"]{background:var(--accent);color:#fff}
  :root[data-theme="dark"] .card-frame{background:#2a2930;box-shadow:0 0 0 1px rgba(255,255,255,.04),0 18px 30px -18px rgba(0,0,0,.8)}
  :root[data-theme="dark"] .card:hover .card-frame{box-shadow:0 0 0 1px rgba(255,255,255,.06),0 28px 40px -20px rgba(0,0,0,.85)}
  :root[data-theme="dark"] .viewer{box-shadow:0 0 0 1px rgba(255,255,255,.08),0 40px 100px -20px rgba(0,0,0,.8)}
  :root[data-theme="dark"] .viewer::backdrop{background:rgba(5,5,8,.7)}
}