:root {
  --ink: #05070b;
  --panel: #0b1018;
  --panel-soft: #111824;
  --line: rgba(255,255,255,.12);
  --text: #f4f7fb;
  --muted: #94a1b2;
  --uv: #74f4ff;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { width: 100%; min-height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, sans-serif;
}
button, input, textarea { font: inherit; }
button { color: inherit; }

.viewer-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(330px, 420px);
  overflow: hidden;
}

.viewer-stage {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 44%, rgba(78,128,150,.2), transparent 34%),
    radial-gradient(circle at 50% 100%, rgba(99,78,231,.14), transparent 42%),
    linear-gradient(145deg, #05070b, #080d15 58%, #05070b);
}
.viewer-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, transparent, #000 30%, #000 80%, transparent);
}
#product-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }

.preview-brand {
  position: absolute;
  z-index: 3;
  top: 30px;
  left: 34px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--text);
  font: 700 1.05rem "Space Grotesk", sans-serif;
  letter-spacing: -.035em;
  text-decoration: none;
}
.preview-brand > span:last-child > span { color: var(--uv); }
.preview-brand__mark { position: relative; width: 34px; height: 34px; border: 1px solid rgba(116,244,255,.7); border-radius: 50%; box-shadow: 0 0 18px rgba(116,244,255,.25); }
.preview-brand__mark::before, .preview-brand__mark::after { content: ""; position: absolute; inset: 6px; border: 2px solid var(--uv); border-left-color: transparent; border-radius: 50%; transform: rotate(-26deg); }
.preview-brand__mark::after { inset: 12px; border-width: 1px; }

.loading-card {
  position: absolute;
  z-index: 4;
  left: 50%;
  top: 50%;
  width: min(330px, calc(100% - 40px));
  padding: 24px;
  display: grid;
  gap: 8px;
  justify-items: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(8,12,19,.8);
  box-shadow: 0 24px 80px rgba(0,0,0,.4);
  backdrop-filter: blur(20px);
  transform: translate(-50%, -50%);
  transition: opacity .4s ease, visibility .4s ease;
}
.loading-card.is-hidden { opacity: 0; visibility: hidden; }
.loading-card strong { margin-top: 7px; font-family: "Space Grotesk", sans-serif; font-size: 1.1rem; }
.loading-card > span:not(.loading-card__disc):not(.loading-card__track) { color: var(--muted); font-size: .82rem; }
.loading-card__disc { width: 52px; height: 52px; border: 2px solid rgba(116,244,255,.24); border-top-color: var(--uv); border-radius: 50%; box-shadow: 0 0 24px rgba(116,244,255,.2); animation: spin 1.2s linear infinite; }
.loading-card__track { width: 100%; height: 3px; margin-top: 9px; border-radius: 10px; background: rgba(255,255,255,.08); overflow: hidden; }
.loading-card__track span { display: block; width: 6%; height: 100%; background: linear-gradient(90deg, #52d9f0, #a77cff); box-shadow: 0 0 12px #74f4ff; transition: width .2s ease; }
@keyframes spin { to { transform: rotate(360deg); } }

.stage-tip, .stage-reset {
  position: absolute;
  z-index: 3;
  bottom: 28px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(8,12,19,.68);
  backdrop-filter: blur(14px);
  color: var(--muted);
  font-size: .76rem;
}
.stage-tip { left: 32px; padding: 10px 15px; pointer-events: none; }
.stage-reset { right: 30px; padding: 9px 14px; cursor: pointer; }
.stage-reset:hover { color: var(--text); border-color: rgba(116,244,255,.48); }

.config-panel {
  position: relative;
  z-index: 5;
  min-height: 100vh;
  padding: clamp(34px, 5vh, 62px) clamp(25px, 3.4vw, 46px);
  border-left: 1px solid var(--line);
  background: rgba(7,10,15,.96);
  overflow-y: auto;
}
.config-panel__heading { padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.config-kicker { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.config-kicker .eyebrow { margin-bottom: 0; }
.config-language-link { color: var(--muted); font-size: .72rem; font-weight: 800; letter-spacing: .08em; text-decoration: none; text-transform: uppercase; }
.config-language-link:hover { color: var(--uv); }
.eyebrow { margin: 0 0 12px; color: var(--uv); font-size: .67rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.config-panel h1 { margin: 0; font: 700 clamp(2rem, 4vw, 3rem)/.98 "Space Grotesk", sans-serif; letter-spacing: -.055em; }
.config-panel__heading > p:last-child { margin: 18px 0 0; color: var(--muted); font-size: .9rem; line-height: 1.55; }

fieldset { margin: 26px 0; padding: 0; border: 0; }
legend { margin-bottom: 11px; color: var(--muted); font-size: .72rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.model-group { margin-bottom: 18px; }
.model-row { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.model-option { min-height: 69px; padding: 12px 13px; display: grid; align-content: center; gap: 3px; text-align: left; border: 1px solid var(--line); border-radius: 14px; background: var(--panel); color: var(--text); cursor: pointer; }
.model-option strong { font-size: .78rem; }
.model-option small { color: var(--muted); font-size: .66rem; }
.model-option:hover, .model-option.is-active { border-color: rgba(116,244,255,.5); background: rgba(116,244,255,.075); box-shadow: inset 0 0 0 1px rgba(116,244,255,.05); }
.model-option.is-active small { color: #bedbe0; }
.preset-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.preset { padding: 9px 5px; display: grid; justify-items: center; gap: 7px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); color: var(--muted); font-size: .7rem; cursor: pointer; }
.preset span { width: 23px; height: 23px; border: 2px solid rgba(255,255,255,.2); border-radius: 50%; background: var(--swatch); box-shadow: inset 0 0 0 2px rgba(0,0,0,.12); }
.preset:hover, .preset.is-active { border-color: rgba(116,244,255,.46); color: var(--text); background: rgba(116,244,255,.07); }
.preset.is-active { box-shadow: inset 0 0 0 1px rgba(116,244,255,.13); }
.control-list { border-top: 1px solid var(--line); }
.color-control { min-height: 78px; padding: 12px 0; display: flex; align-items: center; justify-content: space-between; gap: 18px; border-bottom: 1px solid var(--line); }
.color-control > span { display: grid; gap: 3px; }
.color-control strong, .light-control strong { font-size: .86rem; }
.color-control small, .light-control small { color: var(--muted); font-size: .7rem; }
.mini-swatches { width: 112px; flex: 0 0 auto; display: grid; grid-template-columns: repeat(4, 24px); justify-content: end; gap: 6px 5px; }
.mini-swatches--power { grid-template-columns: repeat(4, 24px); }
.mini-swatch { position: relative; width: 24px; height: 24px; padding: 0; border: 1px solid rgba(255,255,255,.24); border-radius: 50%; background: transparent; cursor: pointer; }
.mini-swatch span { position: absolute; inset: 3px; border-radius: inherit; background: var(--swatch); box-shadow: inset 0 0 0 1px rgba(0,0,0,.16); }
.mini-swatch:hover { border-color: rgba(255,255,255,.72); transform: translateY(-1px); }
.mini-swatch.is-active { border-color: var(--uv); box-shadow: 0 0 0 2px rgba(116,244,255,.16), 0 0 14px rgba(116,244,255,.16); }
.fixed-swatch { width: 36px; height: 36px; flex: 0 0 auto; border: 1px solid rgba(255,255,255,.28); border-radius: 50%; }
.fixed-swatch--uv { background: #6f00ff; box-shadow: inset 0 0 0 3px rgba(0,0,0,.16), 0 0 18px rgba(111,0,255,.58); }

.light-control { margin-top: 24px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.light-control > div { display: grid; gap: 3px; }
.light-switch { min-width: 82px; padding: 6px 11px 6px 6px; display: flex; align-items: center; gap: 8px; border: 1px solid var(--line); border-radius: 999px; background: #151b24; cursor: pointer; }
.light-switch span { width: 26px; height: 26px; border-radius: 50%; background: #657184; transition: background .2s, box-shadow .2s; }
.light-switch b { min-width: 20px; font-size: .7rem; }
.light-switch.is-on { border-color: rgba(116,244,255,.42); background: rgba(116,244,255,.08); }
.light-switch.is-on span { background: var(--uv); box-shadow: 0 0 16px rgba(116,244,255,.7); }

.inquiry-card { margin-top: 28px; padding: 20px; border: 1px solid rgba(116,244,255,.22); border-radius: 18px; background: linear-gradient(145deg, rgba(116,244,255,.07), rgba(111,0,255,.045)); }
.inquiry-card .eyebrow { margin-bottom: 8px; }
.inquiry-card h2 { margin: 0; font: 700 1.22rem/1.15 "Space Grotesk", sans-serif; letter-spacing: -.035em; }
.inquiry-card > p:not(.eyebrow) { margin: 10px 0 0; color: var(--muted); font-size: .76rem; line-height: 1.55; }
.inquiry-open, .inquiry-submit { width: 100%; margin-top: 16px; padding: 12px 16px; border: 1px solid rgba(116,244,255,.46); border-radius: 12px; background: var(--uv); color: #031014; font-size: .78rem; font-weight: 800; cursor: pointer; }
.inquiry-open:hover, .inquiry-submit:hover { box-shadow: 0 0 22px rgba(116,244,255,.2); transform: translateY(-1px); }
.inquiry-open[aria-expanded="true"] { background: rgba(116,244,255,.08); color: var(--uv); }
.inquiry-form { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.inquiry-form[hidden], .inquiry-success[hidden] { display: none; }
.inquiry-form > label:not(.inquiry-consent) { margin-top: 13px; display: grid; gap: 6px; color: var(--muted); font-size: .69rem; }
.inquiry-form input:not([type="checkbox"]), .inquiry-form textarea { width: 100%; padding: 11px 12px; border: 1px solid var(--line); border-radius: 11px; background: rgba(4,7,11,.72); color: var(--text); outline: none; resize: vertical; }
.inquiry-form input:focus, .inquiry-form textarea:focus { border-color: rgba(116,244,255,.58); box-shadow: 0 0 0 3px rgba(116,244,255,.07); }
.inquiry-summary { margin: 0 0 16px; padding: 0; font-size: .7rem; }
.inquiry-summary div { padding: 7px 0; display: flex; justify-content: space-between; gap: 12px; border-bottom: 1px solid rgba(255,255,255,.065); }
.inquiry-summary dt { color: var(--muted); }
.inquiry-summary dd { margin: 0; color: var(--text); font-weight: 700; text-align: right; }
.inquiry-consent { margin-top: 15px; display: flex; align-items: flex-start; gap: 9px; color: var(--muted); font-size: .68rem; line-height: 1.45; }
.inquiry-consent input { width: 17px; height: 17px; flex: 0 0 auto; margin: 1px 0 0; accent-color: var(--uv); }
.inquiry-error { min-height: 18px; margin: 10px 0 0; color: #ff9a9a; font-size: .7rem; line-height: 1.4; }
.inquiry-submit { margin-top: 4px; }
.inquiry-submit:disabled { opacity: .55; cursor: wait; transform: none; }
.inquiry-success { margin-top: 17px; padding: 18px 15px; display: grid; justify-items: center; gap: 7px; border: 1px solid rgba(94,240,167,.28); border-radius: 14px; background: rgba(94,240,167,.07); text-align: center; outline: none; }
.inquiry-success > span { display: grid; width: 32px; height: 32px; place-items: center; border-radius: 50%; background: #5ef0a7; color: #03100a; font-weight: 900; }
.inquiry-success strong { font-size: .82rem; }
.inquiry-success p { margin: 0; color: var(--muted); font-size: .7rem; line-height: 1.45; }
.inquiry-success code { color: #8ff7bd; font: 700 .72rem "Space Grotesk", sans-serif; }

.model-status { margin-top: 34px; padding: 13px 15px; display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 13px; background: var(--panel); color: var(--muted); font-size: .72rem; }
.model-status[hidden] { display: none; }
.status-dot { width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: #f0c15e; box-shadow: 0 0 10px currentColor; }
.model-status.is-ready .status-dot { background: #5ef0a7; }
.model-status.is-error .status-dot { background: #ff7878; }

@media (max-width: 900px) {
  .viewer-shell { display: block; overflow: visible; }
  .viewer-stage { min-height: 64vh; }
  .config-panel { min-height: auto; border-left: 0; border-top: 1px solid var(--line); }
  .stage-tip { bottom: 18px; left: 18px; }
  .stage-reset { bottom: 18px; right: 18px; }
  .preview-brand { top: 21px; left: 21px; }
}

@media (max-width: 520px) {
  .viewer-stage { min-height: 58vh; }
  .stage-tip { max-width: 190px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .preview-brand { font-size: .92rem; }
}

@media (prefers-reduced-motion: reduce) {
  .loading-card__disc { animation-duration: 2.8s; }
}