: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:#e4572e;
  --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)}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.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:disabled{opacity:.5;cursor:progress}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
.btn--accent{background:var(--accent);color:#fff;border:none;font-weight:500}
.btn--accent:hover{background:var(--accent);filter:brightness(1.07)}
.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)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 레이아웃 ---------- */
.ga{flex:1;display:flex;flex-wrap:wrap;align-items:stretch}
.wall{flex:999 1 520px;min-width:0;display:flex;align-items:center;justify-content:center;padding:44px 28px 40px;
  background:radial-gradient(70% 60% at 50% 18%,#fffefb 0%,rgba(255,254,251,0) 70%),linear-gradient(#ecebe5,#e6e4dd);
  border-right:1px solid var(--line)}
.panel{flex:1 1 300px;max-width:100%;min-width:0;background:var(--panel);padding:24px;display:flex;flex-direction:column;gap:22px}
.group{display:flex;flex-direction:column;gap:10px}
.group + .group{border-top:1px solid var(--line-3);padding-top:20px}

/* ---------- 액자 ---------- */
.piece{margin:0;display:flex;flex-direction:column;align-items:center;gap:22px;max-width:100%}
.frame{position:relative;padding:10px;background:#1d1b19;border-radius:3px;
  box-shadow:0 1px 0 #3d3934 inset,0 2px 2px rgba(0,0,0,.2),0 24px 40px -18px rgba(40,30,20,.55),0 60px 90px -40px rgba(40,30,20,.35);
  max-width:100%;transition:width .35s ease,height .35s ease}
.mat{position:relative;width:100%;padding:7%;background:#fbfaf6;box-shadow:inset 0 0 0 1px rgba(0,0,0,.06),inset 2px 3px 8px rgba(0,0,0,.12)}
.mat canvas{display:block;width:100%;height:auto;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.rendering{position:absolute;right:10px;bottom:8px;display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:10px;letter-spacing:.12em;color:var(--sub);opacity:0;transition:opacity .2s}
.rendering.is-on{opacity:1}
.rendering span{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:blink 1s infinite}
@keyframes blink{50%{opacity:.2}}

.plaque{align-self:flex-end;display:grid;grid-template-columns:auto;gap:2px;min-width:210px;max-width:100%;padding:12px 16px 13px;background:#fbfaf6;border-radius:2px;box-shadow:0 1px 0 rgba(255,255,255,.8) inset,0 6px 14px -8px rgba(40,30,20,.4)}
.plaque-no{font-size:10px;letter-spacing:.14em;color:var(--accent)}
.plaque-title{font-size:15px;letter-spacing:-.01em}
.plaque-meta{font-size:12px;color:var(--ink-2)}
.plaque-seed{font-size:10.5px;color:var(--muted);word-break:break-all}

/* ---------- 패널 ---------- */
.seed-row{display:flex;gap:8px}
.seed-input{flex:1;min-width:0;font-family:var(--mono);font-size:14px}
.icon-btn{width:40px;height:40px;flex-shrink:0;border:1px solid var(--line-2);border-radius:10px;background:var(--surface);font-size:18px;cursor:pointer;transition:transform .2s}
.icon-btn:hover{background:var(--hover)}
.icon-btn.is-roll{animation:roll .45s ease}
@keyframes roll{from{transform:rotate(0)}to{transform:rotate(360deg)}}
.note{margin:0;font-size:11.5px;line-height:1.55;color:var(--sub)}
.recent{display:flex;flex-wrap:wrap;gap:6px}
.recent:empty{display:none}
.chip{height:26px;max-width:100%;overflow:hidden;text-overflow:ellipsis;padding:0 10px;border:1px solid var(--line);border-radius:999px;background:var(--surface);font-family:var(--mono);font-size:11px;color:var(--ink-2);cursor:pointer;white-space:nowrap}
.chip:hover{border-color:var(--line-2);color:var(--ink)}

.styles{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.style{display:flex;align-items:center;gap:8px;padding:10px;white-space:nowrap;min-width:0;border:1px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer;font-size:13px;text-align:left;transition:border-color .15s,background .15s}
.style svg{width:26px;height:26px;flex-shrink:0;color:var(--sub)}
.style:hover{border-color:var(--line-2)}
.style[aria-checked="true"]{border-color:var(--ink);background:var(--ink);color:#fff;font-weight:500}
.style[aria-checked="true"] svg{color:var(--accent)}

.palettes{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.pal{display:flex;align-items:center;gap:8px;padding:7px 9px;border:1px solid var(--line);border-radius:10px;background:var(--surface);cursor:pointer;font-size:12px;text-align:left;min-width:0}
.pal:hover{border-color:var(--line-2)}
.pal[aria-checked="true"]{border-color:var(--ink);box-shadow:0 0 0 1px var(--ink) inset}
.pal-sw{display:flex;flex-shrink:0;height:18px;border-radius:5px;overflow:hidden;box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.pal-sw i{width:8px;height:100%}
.pal-sw--auto{width:40px;background:conic-gradient(from 90deg,#e4572e,#f2b134,#7ad3c7,#2a5caa,#ff8fab,#e4572e)}
.pal-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.seg{display:flex;background:var(--soft);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;padding:0 6px;background:transparent;color:var(--sub);border:none;border-radius:999px;font-family:var(--mono);font-size:12px;cursor:pointer;white-space:nowrap}
.seg-btn[aria-checked="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.12)}
.check{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);cursor:pointer}
.check input{accent-color:var(--accent);width:16px;height:16px}

.export-row{display:flex;gap:8px}
.select{flex:1;min-width:0;height:36px;padding:0 10px;border:1px solid var(--line-2);border-radius:999px;background:var(--surface);font:inherit;font-size:12.5px;color:var(--ink)}
.link-btn{align-self:flex-start;padding:0;background:none;border:none;font-size:12px;color:var(--sub);text-decoration:underline;text-underline-offset:3px;cursor:pointer}
.link-btn:hover{color:var(--ink)}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);padding:10px 16px;border-radius:999px;background:var(--ink);color:#fff;font-size:13px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:100}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

@media (max-width:640px){
  .wall{padding:28px 16px 28px;border-right:none}
  .frame{padding:7px}
  .plaque{align-self:stretch;min-width:0}
  .panel{border-top:1px solid var(--line);padding:20px 16px 32px}
}
@media (prefers-reduced-motion:reduce){
  .frame,.toast,.style,.icon-btn{transition:none}
  .icon-btn.is-roll,.rendering span{animation:none}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 밤의 전시 벽. 작품(캔버스)과 매트는 밝게 둠 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#151413; --surface:#1b1a18; --panel:#201f1d; --panel-soft:#262422;
    --ink:#eeece8; --ink-hover:#ffffff; --ink-2:#cbc8c1; --sub:#a39f97; --muted:#8e8a82;
    --line:#302e2b; --line-2:#3b3935; --line-3:#292725; --hover:#2c2a27; --soft:#292725; --track:#37352f;
    --accent:#f06a43;
  }
  :root[data-theme="dark"] .btn--solid,:root[data-theme="dark"] .toast{color:var(--bg)}
  :root[data-theme="dark"] .btn--accent{background:#d9512a}
  :root[data-theme="dark"] .wall{background:radial-gradient(70% 60% at 50% 18%,rgba(255,240,220,.06) 0%,rgba(255,240,220,0) 70%),linear-gradient(#1d1c1a,#181715)}
  :root[data-theme="dark"] .frame{box-shadow:0 1px 0 #3d3934 inset,0 0 0 1px rgba(255,255,255,.05),0 24px 40px -18px rgba(0,0,0,.8),0 60px 90px -40px rgba(0,0,0,.6)}
  :root[data-theme="dark"] .mat{background:#ebe9e3}
  :root[data-theme="dark"] .plaque{background:var(--panel-soft);box-shadow:0 0 0 1px var(--line),0 6px 14px -8px rgba(0,0,0,.6)}
  :root[data-theme="dark"] .style[aria-checked="true"]{border-color:var(--accent);background:rgba(240,106,67,.14);color:var(--ink)}
  :root[data-theme="dark"] .seg-btn[aria-checked="true"]{background:var(--hover);box-shadow:0 1px 3px rgba(0,0,0,.4)}
  :root[data-theme="dark"] .pal-sw{box-shadow:0 0 0 1px rgba(255,255,255,.1)}
}