/* ============================================================
   Vitrine 3D — UI Stylesheet (dark theme)
   ============================================================ */

/* --- Tokens ------------------------------------------------- */
:root {
  --bg:         #0f0f0f;
  --surface:    #181818;
  --surface-2:  #222222;
  --fg:         #ededed;
  --fg-2:       #999999;
  --muted:      #555555;
  --border:     #2a2a2a;
  --border-mid: #3e3e3e;
  --accent:     #ededed;
  --accent-fg:  #111111;
  --sidebar-w:  272px;
  --r:          7px;
  --r-sm:       5px;
  --gap:        14px;
  --t:          0.13s ease;
}

/* --- Base --------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 13px/1.5 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* --- Loading Screen ----------------------------------------- */
#loading-screen {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: #0a0a0a;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
#loading-screen.done {
  opacity: 0;
  pointer-events: none;
}
.ls-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.ls-brand {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 300;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.75);
}
.ls-subtitle {
  margin: 0 0 32px;
  font-size: 9px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
}
.ls-track {
  width: 160px;
  height: 1px;
  background: rgba(255,255,255,0.08);
  border-radius: 1px;
  overflow: hidden;
}
.ls-fill {
  height: 100%;
  width: 0%;
  background: rgba(255,255,255,0.6);
  transition: width 0.3s ease;
}
.ls-pct {
  margin: 12px 0 0;
  font-size: 9px;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.15);
}

/* --- Layout ------------------------------------------------- */
#app {
  height: 100vh;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  overflow: hidden;
}

/* --- Sidebar ------------------------------------------------ */
#sidebar {
  height: 100vh;
  overflow-y: auto;
  overflow-x: hidden;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 20px var(--gap) 48px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#sidebar::-webkit-scrollbar       { width: 3px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.sidebar-brand {
  margin: 0 0 2px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--fg);
}
.sidebar-subtitle {
  margin: 0 0 16px;
  font-size: 9px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.sidebar-rule {
  border: none;
  height: 1px;
  background: var(--border);
  margin: 0 0 18px;
}

/* --- Sidebar sections --------------------------------------- */
.sb-section { margin-bottom: 22px; }
.sb-label {
  display: block;
  margin-bottom: 8px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

/* --- Model grid --------------------------------------------- */
.model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}


.seg-btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--fg-2);
  padding: 7px 6px;
  border-radius: var(--r-sm);
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  transition: border-color var(--t), background var(--t), color var(--t);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.seg-btn:hover           { border-color: var(--border-mid); color: var(--fg); }
.seg-btn[aria-pressed="true"],
.seg-btn.active          { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }

/* --- Swatches ----------------------------------------------- */
.swatch-row { display: flex; flex-wrap: wrap; gap: 7px; }

.swatch-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.08);
  background: var(--sw, #fff);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: transform var(--t);
}
.swatch-btn:hover { transform: scale(1.15); }
.swatch-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.swatch-btn.active,
.swatch-btn[aria-pressed="true"] {
  box-shadow: 0 0 0 2px var(--surface), 0 0 0 3.5px var(--accent);
}

/* --- Logo library ------------------------------------------ */
.file-row { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.file-input-hidden { position: absolute; left: -9999px; }

.btn-upload {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--fg-2);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: border-color var(--t), color var(--t);
}
.btn-upload:hover { border-color: var(--border-mid); color: var(--fg); }

.upload-status {
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 5px;
  min-height: 52px;
  padding: 7px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--bg);
}
.logo-grid img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  border-radius: 3px;
  opacity: 0.6;
  filter: brightness(1.2);
  transition: opacity var(--t);
}
.logo-grid img:hover { opacity: 1; }

.logo-empty {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 11px;
  color: var(--muted);
  align-self: center;
  text-align: center;
}

/* --- Logo assignment --------------------------------------- */
.logo-assignment-grid { display: grid; gap: 7px; }
.logo-assignment-item { display: grid; gap: 3px; }
.logo-assignment-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}
.logo-assignment-select {
  appearance: none;
  padding: 6px 9px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--fg);
  font-size: 11px;
  width: 100%;
  cursor: pointer;
  transition: border-color var(--t);
}
.logo-assignment-select:hover { border-color: var(--border-mid); }
.logo-assignment-select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

/* --- Viewport ---------------------------------------------- */
#viewport { position: relative; min-height: 0; }
#viewport canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* --- Admin panel ------------------------------------------- */
.admin-panel {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 50;
  width: 280px;
}
.admin-shell {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}
.admin-shell > summary {
  cursor: pointer;
  list-style: none;
  padding: 10px 12px;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  user-select: none;
}
.admin-shell > summary::-webkit-details-marker { display: none; }
.admin-content {
  padding: 6px 12px 14px;
  max-height: 55vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.control-group { margin-bottom: 16px; }
.control       { margin-bottom: 10px; }
.control > label {
  display: block;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 5px;
}
.slider-row { display: flex; align-items: center; gap: 7px; }
.slider-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.slider-row span { font-size: 10px; color: var(--muted); min-width: 28px; text-align: right; }

.control select {
  appearance: none;
  width: 100%;
  padding: 6px 9px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--fg);
  font-size: 11px;
  cursor: pointer;
  transition: border-color var(--t);
}
.control select:hover { border-color: var(--border-mid); }
.control select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

/* --- Cinematic button -------------------------------------- */
.cinematic-btn {
  width: 100%;
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--fg-2);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  text-align: left;
  transition: background var(--t), color var(--t), border-color var(--t);
}
.cinematic-btn:hover  { border-color: var(--border-mid); color: var(--fg); }
.cinematic-btn.active { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
.cinematic-hint { margin: 5px 0 0; font-size: 9px; color: var(--muted); }