: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:#a78bfa;
  --velvet:#140f1f; --velvet-2:#1c1529; --gold:#e8c27a; --v-line:rgba(255,255,255,.09); --v-sub:rgba(255,255,255,.58);
  --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: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:.4;cursor:default}
.btn:disabled:hover{background:transparent}
.btn--solid{background:var(--ink);color:#fff;border:none;font-weight:500}
.btn--solid:hover{background:var(--ink-hover)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 레이아웃 ---------- */
.kal{flex:1;display:flex;flex-wrap:wrap;align-items:stretch;background:var(--velvet);color:#fff}
.scope{position:relative;flex:999 1 520px;min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:22px;padding:36px 28px 32px;overflow:hidden;
  background:radial-gradient(60% 55% at 50% 42%,#2a1f45 0%,rgba(42,31,69,0) 70%),radial-gradient(40% 40% at 85% 90%,rgba(232,194,122,.08),transparent 70%),var(--velvet)}
.panel{flex:1 1 290px;max-width:100%;min-width:0;background:var(--velvet-2);border-left:1px solid var(--v-line);padding:24px;display:flex;flex-direction:column;gap:22px}
.panel .mono-label{color:var(--v-sub)}
.group{display:flex;flex-direction:column;gap:12px}
.group + .group{border-top:1px solid var(--v-line);padding-top:20px}

/* ---------- 렌즈 ---------- */
.lens{position:relative;width:var(--size,520px);height:var(--size,520px);border-radius:50%;flex-shrink:0;
  box-shadow:0 0 0 2px var(--gold),0 0 0 9px #241b33,0 0 0 10px rgba(232,194,122,.45),0 30px 80px -20px rgba(0,0,0,.7),0 0 120px -30px rgba(167,139,250,.5);
  touch-action:none;user-select:none;-webkit-user-select:none;cursor:crosshair}
.lens canvas{position:absolute;inset:0;width:100%;height:100%;border-radius:50%;display:block}
#guide{pointer-events:none}
.lens-hint{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);margin:0;padding:8px 14px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);font-size:13px;color:rgba(255,255,255,.8);pointer-events:none;white-space:nowrap;transition:opacity .4s}
.lens-hint.is-hidden{opacity:0}
.lens.is-light .lens-hint{background:rgba(0,0,0,.06);border-color:rgba(0,0,0,.1);color:#55534d}

/* ---------- 도크 ---------- */
.dock{display:flex;align-items:center;gap:6px;padding:6px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid var(--v-line);backdrop-filter:blur(8px);flex-wrap:wrap;justify-content:center;max-width:100%}
.dock-btn{height:36px;min-width:36px;padding:0 12px;border:none;border-radius:999px;background:rgba(255,255,255,.08);color:#fff;font-size:15px;cursor:pointer;white-space:nowrap}
.dock-btn:hover{background:rgba(255,255,255,.16)}
.dock-btn--wide{font-size:12.5px}
.dock-btn[aria-pressed="true"]{background:var(--gold);color:#241b33;font-weight:500}
.sym-read{display:flex;flex-direction:column;align-items:center;min-width:64px;line-height:1}
.sym-read b{font-family:var(--mono);font-size:22px;font-weight:700;color:var(--gold)}
.sym-read span{font-family:var(--mono);font-size:8.5px;letter-spacing:.16em;color:var(--v-sub);margin-top:3px}
.dock-sep{width:1px;height:22px;background:var(--v-line);margin:0 4px}

/* ---------- 패널 컨트롤 ---------- */
.row-head{display:flex;justify-content:space-between;align-items:center;gap:8px}
.panel .tb-num{color:#fff}
.panel .tb-num-wrap{color:var(--v-sub)}
.group .tb-presets{margin-top:-4px}
.tb-presets button[aria-pressed="true"]{color:var(--velvet)}
.val{font-family:var(--mono);font-size:18px;font-weight:700;color:var(--gold)}
input[type=range]{width:100%;margin:0;accent-color:var(--gold)}
.switch{position:relative;display:flex;align-items:center;gap:10px;font-size:13px;color:rgba(255,255,255,.88);cursor:pointer}
.switch small{font-size:11px;color:var(--v-sub)}
.switch input{position:absolute;opacity:0;width:36px;height:20px;margin:0}
.switch-ui{position:relative;width:36px;height:20px;flex-shrink:0;border-radius:999px;background:rgba(255,255,255,.16);transition:background .2s}
.switch-ui::after{content:"";position:absolute;left:2px;top:2px;width:16px;height:16px;border-radius:50%;background:#fff;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(--gold);outline-offset:2px}

.swatches{display:flex;flex-wrap:wrap;gap:8px}
.sw{width:34px;height:34px;border-radius:50%;border:2px solid var(--velvet-2);box-shadow:0 0 0 1px rgba(255,255,255,.18);cursor:pointer;padding:0}
.sw[aria-checked="true"]{box-shadow:0 0 0 2px var(--gold)}
.sw--rainbow{background:conic-gradient(#ff5d8f,#ffb347,#fff27a,#7dffb3,#6ad3ff,#a78bfa,#ff5d8f)}
.custom-color{display:flex;align-items:center;gap:10px;font-size:12.5px;color:var(--v-sub);cursor:pointer}
.custom-color input{width:34px;height:26px;padding:0;border:1px solid rgba(255,255,255,.2);border-radius:8px;background:transparent;cursor:pointer}
.pen-preview{height:44px;border-radius:12px;background:rgba(0,0,0,.25);display:flex;align-items:center;justify-content:center}
.pen-preview span{display:block;border-radius:999px;width:60%;height:6px;background:#fff;transition:height .15s}

.seg{display:flex;background:rgba(255,255,255,.06);border-radius:999px;padding:3px;gap:2px}
.seg-btn{flex:1;height:30px;padding:0 10px;background:transparent;color:var(--v-sub);border:none;border-radius:999px;font-size:12.5px;cursor:pointer;white-space:nowrap}
.seg-btn[aria-checked="true"]{background:rgba(255,255,255,.14);color:#fff;font-weight:500}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,20px);padding:10px 16px;border-radius:999px;background:var(--gold);color:#241b33;font-size:13px;font-weight:500;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){
  .scope{padding:24px 16px 22px;gap:16px}
  .panel{border-left:none;border-top:1px solid var(--v-line);padding:20px 16px 32px}
  .dock-sep{display:none}
}
@media (prefers-reduced-motion:reduce){
  .lens-hint,.switch-ui,.switch-ui::after,.toast,.pen-preview span{transition:none}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 벨벳 영역은 원래부터 어두움 */
@media screen{
  :root[data-theme="dark"]{
    color-scheme:dark;
    --bg:#110d19; --surface:#16121f; --panel:#1b1626; --panel-soft:#211b2d;
    --ink:#eeebf4; --ink-hover:#ffffff; --ink-2:#cbc6d6; --sub:#a39daf; --muted:#8d879a;
    --line:#2b2538; --line-2:#362f44; --line-3:#241f30; --hover:#272134; --soft:#241f30; --track:#332c40;
  }
  :root[data-theme="dark"] .btn--solid{color:var(--bg)}
}