: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:#ff6a1a;
  --body:#e7e5df; --body-2:#dad7cf; --screen:#0b0d0c;
  --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: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)}
.btn--solid:disabled:hover{background:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media (max-width:640px){ .topbar{padding:14px 16px} }

/* ---------- 기기 ---------- */
.sv{flex:1;display:flex;flex-direction:column;align-items:center;padding:32px 28px 36px;gap:16px}
.device{width:100%;max-width:1080px;padding:16px 18px 18px;border-radius:26px;
  background:linear-gradient(180deg,#efede8 0%,var(--body) 40%,var(--body-2) 100%);
  box-shadow:0 1px 0 #fff inset,0 -2px 0 rgba(0,0,0,.06) inset,0 2px 0 #c9c5bb,0 30px 60px -30px rgba(40,30,20,.45)}
.device-top{display:flex;align-items:center;gap:10px;padding:0 4px 12px}
.led{width:9px;height:9px;border-radius:50%;background:#b9b5ab;box-shadow:inset 0 1px 1px rgba(0,0,0,.25)}
.led.is-on{background:var(--accent);box-shadow:0 0 10px var(--accent),0 0 2px #fff inset}
.device-name{font-size:11px;letter-spacing:.14em;color:#8d897f}
.src{margin-left:auto;font-size:11px;letter-spacing:.14em;padding:3px 9px;border-radius:6px;background:#d2cec5;color:#6b675e}
.src.is-live{background:var(--ink);color:var(--accent)}

.screen{position:relative;height:clamp(300px,calc(100vh - 360px),560px);border-radius:16px;overflow:hidden;background:var(--screen);
  box-shadow:inset 0 2px 8px rgba(0,0,0,.6),0 0 0 3px #cfcbc2,0 0 0 4px #bdb9b0}
.screen canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.screen::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:inherit;
  background:radial-gradient(120% 90% at 50% 50%,transparent 60%,rgba(0,0,0,.45) 100%)}
.screen:fullscreen{border-radius:0;height:100%}

.start{position:absolute;inset:0;z-index:2;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px;text-align:center;background:rgba(8,10,9,.55);backdrop-filter:blur(2px)}
.start-title{margin:0;color:#fff;font-size:18px;font-weight:700;letter-spacing:-.01em}
.start-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:center}
.big-btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 20px;border-radius:999px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.08);color:#fff;font-size:15px;font-weight:500;cursor:pointer;transition:transform .15s,background .15s}
.big-btn:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.big-btn--mic{background:var(--accent);border-color:var(--accent);box-shadow:0 10px 30px -10px var(--accent)}
.big-btn--mic:hover{background:var(--accent);filter:brightness(1.08)}
.start-note{margin:0;max-width:440px;font-size:12.5px;line-height:1.6;color:rgba(255,255,255,.7)}
.start-error{margin:0;max-width:460px;padding:10px 14px;border-radius:12px;background:rgba(255,106,26,.16);border:1px solid rgba(255,106,26,.5);color:#ffd2b8;font-size:13px;line-height:1.55}

.readout{position:absolute;right:14px;top:12px;z-index:1;display:flex;gap:14px;font-size:10.5px;letter-spacing:.1em;color:rgba(255,255,255,.45);pointer-events:none}
.readout b{color:#fff;font-weight:500;font-variant-numeric:tabular-nums}

/* ---------- 컨트롤 ---------- */
.controls{display:grid;grid-template-columns:auto auto 1fr 200px;gap:14px;align-items:stretch;margin-top:16px}
.ctl{display:flex;flex-direction:column;gap:8px;padding:12px 14px;border-radius:16px;background:rgba(255,255,255,.45);box-shadow:inset 0 1px 0 #fff,0 1px 0 rgba(0,0,0,.05);min-width:0}
.ctl-label{font-size:10px;letter-spacing:.16em;color:#8d897f}
.keys{display:flex;gap:6px}
.key{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:64px;height:58px;border:none;border-radius:12px;background:linear-gradient(#fbfaf7,#ecebe6);box-shadow:0 2px 0 #c4c0b6,0 3px 6px -2px rgba(0,0,0,.2);font-size:12px;color:var(--ink-2);cursor:pointer;transition:transform .08s,box-shadow .08s}
.key svg{width:28px;height:14px}
.key:active{transform:translateY(2px);box-shadow:0 0 0 #c4c0b6}
.key[aria-checked="true"]{background:linear-gradient(#2a2926,#1c1c1a);color:#fff;box-shadow:0 2px 0 #000,0 3px 6px -2px rgba(0,0,0,.3)}
.key[aria-checked="true"] svg{color:var(--accent)}
.themes{display:grid;grid-template-columns:repeat(3,auto);gap:6px}
.theme{width:34px;height:26px;border-radius:8px;border:none;cursor:pointer;box-shadow:0 0 0 2px transparent,0 1px 2px rgba(0,0,0,.25)}
.theme[aria-checked="true"]{box-shadow:0 0 0 2px var(--ink),0 1px 2px rgba(0,0,0,.25)}
.slider-row{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-2)}
.slider-row output{font-family:var(--mono);font-size:11.5px;color:var(--ink)}
input[type=range]{width:100%;margin:0 0 4px;accent-color:var(--accent)}
.meter{position:relative;height:12px;border-radius:999px;background:#2a2926;overflow:hidden;box-shadow:inset 0 1px 2px rgba(0,0,0,.5)}
.meter i{position:absolute;left:0;top:0;bottom:0;width:0;border-radius:999px;background:linear-gradient(90deg,#3ddc84 0%,#c6ef3a 60%,#ffb000 80%,#ff3d3d 100%);background-size:180px 100%}
.meter-db{font-size:18px;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums}

.privacy{margin:0;max-width:1080px;width:100%;font-size:12.5px;color:var(--sub);text-align:center;line-height:1.6}

@media (max-width:900px){
  .controls{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .sv{padding:16px 16px 24px}
  .device{padding:12px;border-radius:20px}
  .screen{height:56vh;min-height:320px;border-radius:12px}
  .controls{grid-template-columns:1fr;gap:10px}
  .keys .key{flex:1;width:auto}
  .themes{grid-template-columns:repeat(5,1fr)}
  .theme{width:auto}
  .start-title{font-size:16px}
  .big-btn{height:44px;font-size:14px;padding:0 16px}
}
@media (prefers-reduced-motion:reduce){
  .big-btn,.key{transition:none}
}

/* 다크 모드 (인쇄는 라이트 그대로) — 기기 몸체를 건메탈로, 화면은 원래부터 검정 */
@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;
    --body:#24232a; --body-2:#1d1c22;
  }
  :root[data-theme="dark"] .btn--solid{color:var(--bg)}
  :root[data-theme="dark"] .device{background:linear-gradient(180deg,#2b2a31 0%,var(--body) 40%,var(--body-2) 100%);
    box-shadow:0 1px 0 rgba(255,255,255,.07) inset,0 -2px 0 rgba(0,0,0,.25) inset,0 2px 0 #0d0c11,0 30px 60px -30px rgba(0,0,0,.8)}
  :root[data-theme="dark"] .led{background:#4a4852}
  :root[data-theme="dark"] .led.is-on{background:var(--accent)}
  :root[data-theme="dark"] .device-name,:root[data-theme="dark"] .ctl-label{color:var(--muted)}
  :root[data-theme="dark"] .src{background:#34333c;color:#b3b1bd}
  :root[data-theme="dark"] .src.is-live{background:#0b0d0c;color:var(--accent)}
  :root[data-theme="dark"] .screen{box-shadow:inset 0 2px 8px rgba(0,0,0,.6),0 0 0 3px #36353d,0 0 0 4px #2a2930}
  :root[data-theme="dark"] .ctl{background:rgba(255,255,255,.035);box-shadow:inset 0 1px 0 rgba(255,255,255,.05),0 1px 0 rgba(0,0,0,.2)}
  :root[data-theme="dark"] .key{background:linear-gradient(#34333b,#2a2930);box-shadow:0 2px 0 #121116,0 3px 6px -2px rgba(0,0,0,.5)}
  :root[data-theme="dark"] .key:active{box-shadow:0 0 0 #121116}
  :root[data-theme="dark"] .key[aria-checked="true"]{background:linear-gradient(#111014,#0b0b0e);color:#fff;box-shadow:0 0 0 1px rgba(255,106,26,.55) inset,0 2px 0 #000,0 3px 6px -2px rgba(0,0,0,.5)}
  :root[data-theme="dark"] .meter{background:#0e0d12}
  :root[data-theme="dark"] .big-btn--mic,:root[data-theme="dark"] .big-btn--mic:hover{background:#e2560c;border-color:#e2560c}
}