:root { --lamp: #f0a640; --lamp-2: #ffc06a; --ink: #15171a; --alu: #e9ebee; --mute-d: #9aa0a8; --f-mono: "IBM Plex Mono", ui-monospace, monospace; }
.lab-card { background: #17181b; color: #e9ebee; border-radius: 24px; padding: clamp(14px, 2.6vw, 34px); border: 1px solid #2a2c30; }
.lab-card .kn .arc { color: var(--k-arc, var(--lamp)); }
.lab-card .read, .lab-card .kn output { color: var(--k-read, var(--lamp)); }
/* 실험실 부품 */
.lab-bar { display: flex; flex-wrap: wrap; gap: 10px 12px; align-items: center; margin-top: 18px; }
.sound { display: inline-flex; align-items: center; gap: 10px; height: 44px; padding: 0 18px 0 7px; border-radius: 999px; border: 0; cursor: pointer; background: var(--alu); color: var(--ink); font: 700 14.5px var(--f-ko); transition: transform .2s; }
.sound:active { transform: scale(.96); }
.sound i { width: 30px; height: 30px; border-radius: 50%; background: var(--ink); color: var(--alu); display: grid; place-items: center; font-style: normal; }
.sound[aria-pressed="true"] { background: var(--lamp); }
.eqbars { display: inline-flex; gap: 2px; align-items: end; height: 13px; }
.eqbars b { width: 3px; background: currentColor; height: 30%; border-radius: 1px; }
.sound[aria-pressed="true"] .eqbars b { animation: eqb .8s infinite ease-in-out alternate; }
.eqbars b:nth-child(2) { animation-delay: -.3s !important; } .eqbars b:nth-child(3) { animation-delay: -.6s !important; } .eqbars b:nth-child(4) { animation-delay: -.15s !important; }
@keyframes eqb { from { height: 20%; } to { height: 100%; } }
.seg { display: inline-flex; background: #26282c; border-radius: 999px; padding: 3px; }
.seg button { border: 0; background: none; color: #c9cdd3; height: 34px; padding: 0 13px; border-radius: 999px; cursor: pointer; font: 700 13px var(--f-ko); }
.seg button[aria-pressed="true"] { background: var(--alu); color: var(--ink); }
.read { font: 500 13px var(--f-mono); color: var(--lamp); margin: 0; font-variant-numeric: tabular-nums; }
.lab-bar .read { margin-left: auto; }
.counter { font-size: 18px; }
.knobs { display: flex; flex-wrap: wrap; gap: 18px 28px; justify-content: center; margin-top: 24px; }
.kn { display: flex; flex-direction: column; align-items: center; gap: 8px; user-select: none; -webkit-user-select: none; touch-action: none; width: 88px; }
.kn .face { width: 70px; height: 70px; border-radius: 50%; position: relative; cursor: ns-resize; background: radial-gradient(circle at 50% 38%, #5a5c61, #222326 62%, #121314); box-shadow: 0 10px 22px rgba(0, 0, 0, .6), inset 0 1px 0 rgba(255, 255, 255, .18); touch-action: none; }
.kn .face::before { content: ""; position: absolute; inset: 9px; border-radius: 50%; background: radial-gradient(circle at 50% 30%, #8c8f94, #3a3c40 70%); }
.kn .face i { position: absolute; left: 50%; top: 7px; width: 3px; height: 14px; margin-left: -1.5px; border-radius: 2px; background: var(--lamp); transform-origin: 50% 28px; }
.kn .arc { position: absolute; inset: -8px; width: calc(100% + 16px); height: calc(100% + 16px); }
.kn label { font: 700 11.5px var(--f-ko); color: #c9cdd3; text-align: center; }
.kn output { font: 500 12px var(--f-mono); color: var(--lamp); }
.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 26px; align-items: center; margin-top: 22px; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }
.vu { width: 100%; max-width: 400px; display: block; margin: 0 auto; }
.scope { width: 100%; aspect-ratio: 16 / 8; border-radius: 16px; background: #0b0c0b; display: block; touch-action: none; }
@media (max-width: 600px) { .scope { aspect-ratio: 4 / 3; } }

.layered { position: relative; width: 100%; user-select: none; -webkit-user-select: none; overflow: hidden; border-radius: 12px; }
.layered > img, .layered > .lyr { position: absolute; left: 0; top: 0; width: 100%; height: 100%; }
.layered > img.base { position: relative; height: auto; }
.layered .spin { position: absolute; transform-origin: 50% 50%; will-change: transform; pointer-events: none; }
.layered .grab { position: absolute; border-radius: 50%; cursor: grab; touch-action: none; }
.layered .ring { position: absolute; border-radius: 50%; pointer-events: none; transition: box-shadow .3s; }
.layered .grab:hover + .ring { box-shadow: 0 0 0 2px rgba(240, 166, 64, .7), 0 0 30px rgba(240, 166, 64, .3); }
.rot-crop { position: absolute; border-radius: 50%; background-repeat: no-repeat; will-change: transform; cursor: ns-resize; touch-action: none; }
.rot-crop:hover { box-shadow: 0 0 0 2px rgba(240, 166, 64, .7); }
.hint-bubble { position: absolute; transform: translate(-50%, -100%); background: rgba(16, 17, 19, .88); color: #fff; font: 700 12.5px var(--f-ko); padding: 7px 12px; border-radius: 999px; white-space: nowrap; pointer-events: none; transition: opacity .4s; z-index: 3; animation: bob 2s ease-in-out infinite; }
@keyframes bob { 50% { transform: translate(-50%, calc(-100% - 5px)); } }

.retro-lab { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 30px; align-items: center; }
.retro-wrap { position: relative; }
.retro-stack { position: relative; width: min(460px, 100%); margin: 0 auto; }
.retro-stack img.base { border-radius: 12px; }
.retro-stack canvas.lid { position: absolute; left: 0; width: 100%; pointer-events: none; }
.retro-stack .hit { position: absolute; cursor: pointer; }
.how { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; font-size: 14.5px; color: var(--mute-d); }
.how b { color: var(--alu); margin-right: 8px; }
.retro-side .read { margin-top: 16px; }
@media (max-width: 760px) { .retro-lab { grid-template-columns: 1fr; gap: 10px; } }

/* 이미지 노브 (제품의 실제 노브 그림) */
.kn .face.img { background: none; box-shadow: none; }
.kn .face.img::before { display: none; }
.kn .face.img > span { position: absolute; inset: 0; background: center / contain no-repeat; pointer-events: none; }
.kn .face.img .rot { will-change: transform; }
.kn .face.img i.dot { position: absolute; left: 50%; top: 8%; width: 6px; height: 6px; margin-left: -3px; border-radius: 50%; background: #f3ecd9; box-shadow: 0 0 0 1px rgba(0, 0, 0, .45); transform: none; }
.skin-retro .kn .face.img .cap { inset: 17.5%; transform: translate(-3%, -7.5%); }

/* 버튼 공통 모양을 스킨 변수로 */
.lab-card .seg { background: var(--seg-tray, #26282c); gap: var(--seg-gap, 0); }
.lab-card .seg button { background: var(--seg-bg, none); color: var(--seg-fg, #c9cdd3); box-shadow: var(--seg-sh, none); border-radius: var(--seg-r, 999px); }
.lab-card .seg button[aria-pressed="true"] { background: var(--seg-on-bg, var(--alu)); color: var(--seg-on-fg, var(--ink)); box-shadow: var(--seg-on-sh, none); }
.lab-card .sound { background: var(--snd-bg, var(--alu)); color: var(--snd-fg, var(--ink)); box-shadow: var(--seg-sh, none); border-radius: var(--snd-r, 999px); }
.lab-card .sound i { background: var(--snd-dot, var(--ink)); color: var(--snd-bg, var(--alu)); }
.lab-card .sound[aria-pressed="true"] { background: var(--snd-on-bg, var(--lamp)); color: var(--snd-on-fg, var(--ink)); box-shadow: var(--seg-on-sh, none); }

/* MG-Retro: 아이보리 피아노 키 + 빨간 키, 검은 플라스틱 */
.skin-retro { background: #1c1b19; border-color: #34312c;
  --seg-tray: #0f0e0d; --seg-bg: linear-gradient(#f4eedd, #ddd3bb); --seg-fg: #2b2620; --seg-sh: inset 0 -4px 0 #b9ad92, 0 2px 0 #000; --seg-r: 6px; --seg-gap: 4px;
  --seg-on-bg: linear-gradient(#d9cfb5, #cdc2a5); --seg-on-fg: #2b2620; --seg-on-sh: inset 0 2px 3px rgba(0, 0, 0, .35);
  --snd-bg: linear-gradient(#f4eedd, #ddd3bb); --snd-fg: #2b2620; --snd-dot: #c2392b; --snd-r: 8px;
  --snd-on-bg: linear-gradient(#d9483a, #b3301f); --snd-on-fg: #fff; --k-read: #f0b45a; --k-arc: #e0a24a; }
.skin-retro .how b { color: #f4eedd; }

/* MG-4000D: 헤어라인 알루미늄과 검정 레버, 호박색 VU 램프 */
.skin-m4 { background: linear-gradient(#1a1a1a, #111); border-color: #2c2c2c;
  --seg-tray: #0b0b0b; --seg-bg: linear-gradient(#e4e5e7, #a9acb1); --seg-fg: #141414; --seg-sh: inset 0 1px 0 #fff, 0 1px 2px #000; --seg-r: 4px; --seg-gap: 3px;
  --seg-on-bg: linear-gradient(#2a2a2a, #0d0d0d); --seg-on-fg: #ffb648; --seg-on-sh: inset 0 1px 3px #000;
  --snd-bg: linear-gradient(#e4e5e7, #a9acb1); --snd-fg: #141414; --snd-dot: #141414; --snd-r: 6px;
  --snd-on-bg: linear-gradient(#ffcf7a, #f0a640); --snd-on-fg: #1a1206; --k-read: #ffb648; --k-arc: #f0a640; }

/* MG-2A: 은색 패널, MIG 레드, 크림 VU */
.skin-m2a { background: linear-gradient(#202124, #151618); border-color: #313337;
  --seg-tray: #0e0f10; --seg-bg: linear-gradient(#eef0f2, #b8bcc2); --seg-fg: #1b1c1e; --seg-sh: inset 0 1px 0 #fff, 0 1px 2px #000; --seg-r: 5px; --seg-gap: 3px;
  --seg-on-bg: linear-gradient(#d24a3a, #a92a1d); --seg-on-fg: #fff; --seg-on-sh: inset 0 1px 3px rgba(0, 0, 0, .5);
  --snd-bg: linear-gradient(#eef0f2, #b8bcc2); --snd-fg: #1b1c1e; --snd-dot: #b8321c; --snd-r: 6px;
  --snd-on-bg: linear-gradient(#d24a3a, #a92a1d); --snd-on-fg: #fff; --k-read: #f2d79b; --k-arc: #d24a3a; }

/* MG-Resonance: 형광(PHOSPHOR) 화면 */
.skin-res { background: #0a0e0a; border-color: #1e2b1e;
  --seg-tray: #0f160f; --seg-bg: none; --seg-fg: #9bd17a; --seg-r: 4px; --seg-on-bg: #9bd17a; --seg-on-fg: #0a0e0a;
  --snd-bg: #132013; --snd-fg: #b9e79a; --snd-dot: #9bd17a; --snd-r: 6px; --snd-on-bg: #9bd17a; --snd-on-fg: #0a0e0a; --k-read: #9bd17a; --k-arc: #9bd17a; }
.skin-res .seg { box-shadow: inset 0 0 0 1px #2c4a2c; }
.skin-res .sound { box-shadow: inset 0 0 0 1px #2c4a2c; }
.skin-res .kn .face { background: radial-gradient(circle at 50% 40%, #1f2a1f, #0b100b 70%); box-shadow: 0 0 0 1px #2c4a2c, 0 0 18px rgba(155, 209, 122, .12); }
.skin-res .kn .face::before { background: radial-gradient(circle at 50% 35%, #2a3a2a, #111811 70%); }
.skin-res .kn .face i { background: #9bd17a; box-shadow: 0 0 6px #9bd17a; }
.skin-res .kn label { color: #9bd17a; }

/* MG-DynEQ: 크림(CREAM) 화면 */
.skin-dyn { background: #f3eee2; border-color: #ddd5c4; color: #2f2b24;
  --seg-tray: #e4dccb; --seg-bg: none; --seg-fg: #5a5245; --seg-on-bg: #fffaf0; --seg-on-fg: #2f2b24; --seg-on-sh: 0 1px 3px rgba(60, 50, 30, .25);
  --snd-bg: #2f2b24; --snd-fg: #f3eee2; --snd-dot: #e07a2e; --snd-on-bg: #e07a2e; --snd-on-fg: #fff; --k-read: #c0601d; --k-arc: #e07a2e; }
.skin-dyn .sound i { color: #fff; }
.skin-dyn .kn .face { background: radial-gradient(circle at 50% 35%, #fffdf7, #ded6c4 75%); box-shadow: 0 6px 14px rgba(70, 55, 30, .25), inset 0 -2px 3px rgba(0, 0, 0, .08); }
.skin-dyn .kn .face::before { background: radial-gradient(circle at 50% 30%, #fffdf8, #ebe4d4 70%); }
.skin-dyn .kn .face i { background: #2f2b24; }
.skin-dyn .kn label { color: #4a443a; }
.skin-dyn .scope { background: #fbf8f1; box-shadow: inset 0 0 0 1px #e0d8c6; }