/* ==========================================================================
   King of the Hammers — 3D Model Library
   Dark engineering theme
   ========================================================================== */

:root {
  --bg: #141414;
  --panel: #1d1d1d;
  --panel-raised: #242424;
  --border: #303030;
  --accent: #ff8c00;
  --accent-soft: rgba(255, 140, 0, 0.14);
  --text: #e9e9e9;
  --text-dim: #9c9c9c;
  --text-faint: #6d6d6d;
  --danger: #ff6b57;

  --sidebar-width: 320px;
  --sidebar-min: 240px;
  --sidebar-max: 520px;

  --radius: 10px;
  --radius-sm: 7px;
  --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  --transition: 160ms ease;
}

* { box-sizing: border-box; }

html {
  color-scheme: dark; /* native widgets (select popups, etc.) render dark */
}

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
}

button { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #3a3a3a; border-radius: 5px; border: 2px solid var(--panel); }
::-webkit-scrollbar-thumb:hover { background: #4a4a4a; }

/* ==========================================================================
   App layout
   ========================================================================== */

.app {
  display: flex;
  height: 100vh;
  height: 100dvh;
}

/* ==========================================================================
   Sidebar
   ========================================================================== */

.sidebar {
  position: relative;
  z-index: 30;
  display: flex;
  flex-direction: column;
  width: var(--sidebar-width);
  min-width: var(--sidebar-min);
  max-width: var(--sidebar-max);
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
}

.app.is-resizing { cursor: col-resize; user-select: none; }
.app.is-resizing .sidebar { transition: none; }

.sidebar__header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar__logo-card {
  flex-shrink: 0;
  width: 64px;
  height: 48px;
  display: grid;
  place-items: center;
  background: #f4f2ee;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.sidebar__logo-card img {
  max-width: 88%;
  max-height: 88%;
  object-fit: contain;
}

.sidebar__title { display: flex; flex-direction: column; min-width: 0; }

.sidebar__title-main {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__title-sub {
  font-size: 11px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.09em;
  white-space: nowrap;
}

/* --- Search --- */

.sidebar__search {
  position: relative;
  display: flex;
  align-items: center;
  margin: 12px 14px;
}

.sidebar__search-icon {
  position: absolute;
  left: 11px;
  color: var(--text-faint);
  pointer-events: none;
}

.sidebar__search input {
  width: 100%;
  padding: 8px 34px 8px 33px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.sidebar__search input::placeholder { color: var(--text-faint); }

.sidebar__search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.sidebar__search input::-webkit-search-cancel-button { -webkit-appearance: none; }

.sidebar__search-kbd {
  position: absolute;
  right: 9px;
  padding: 1px 7px;
  font: 11px/1.6 inherit;
  color: var(--text-faint);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 5px;
  pointer-events: none;
}

/* --- Category / model tree --- */

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: 2px 8px 12px;
}

.category { margin-bottom: 2px; }

.category__header {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 10px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.category__header:hover { background: var(--panel-raised); color: var(--text); }

.category__chevron {
  flex-shrink: 0;
  transition: transform var(--transition);
}

.category.is-collapsed .category__chevron { transform: rotate(-90deg); }

.category__name {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.category__count {
  padding: 0 7px;
  font-size: 11px;
  font-weight: 500;
  color: var(--text-dim);
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 99px;
}

.category__list {
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow: hidden;
}

.category.is-collapsed .category__list { display: none; }

.model-item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 7px 10px 7px 26px;
  background: none;
  border: none;
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  text-align: left;
  color: var(--text-dim);
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
}

.model-item:hover {
  background: var(--panel-raised);
  color: var(--text);
  transform: translateX(2px);
}

.model-item.is-active {
  background: var(--accent-soft);
  border-left-color: var(--accent);
  color: var(--text);
  font-weight: 600;
}

.model-item__icon { flex-shrink: 0; color: var(--text-faint); transition: color var(--transition); }
.model-item:hover .model-item__icon,
.model-item.is-active .model-item__icon { color: var(--accent); }

.model-item__name {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar__empty {
  padding: 28px 16px;
  text-align: center;
  color: var(--text-faint);
}

/* --- Sidebar footer --- */

.sidebar__footer {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faint);
}

.sidebar__count { color: var(--text-dim); }

/* --- Resize handle --- */

.sidebar__resizer {
  position: absolute;
  top: 0;
  right: -4px;
  width: 8px;
  height: 100%;
  cursor: col-resize;
  z-index: 40;
}

.sidebar__resizer::after {
  content: "";
  position: absolute;
  top: 0;
  left: 3px;
  width: 2px;
  height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.sidebar__resizer:hover::after,
.app.is-resizing .sidebar__resizer::after { opacity: 1; }

/* --- Mobile drawer backdrop --- */

.sidebar-backdrop {
  position: fixed;
  inset: 0;
  z-index: 25;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 220ms ease;
}

.sidebar-backdrop.is-visible { opacity: 1; }

/* ==========================================================================
   Main panel
   ========================================================================== */

.main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* --- Toolbar --- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 8px 16px;
  flex-shrink: 0;
}

.toolbar__menu { display: none; }

.toolbar__actions {
  display: flex;
  gap: 6px;
  margin-left: auto;
}

.env-rotation {
  -webkit-appearance: none;
  appearance: none;
  width: 110px;
  height: 4px;
  margin: 15px 6px 15px 0;
  background: var(--border);
  border-radius: 99px;
  cursor: pointer;
}

.env-rotation::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-dim);
  border: 2px solid var(--panel);
  transition: background var(--transition);
}

.env-rotation:hover::-webkit-slider-thumb { background: var(--accent); }

.env-rotation::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--text-dim);
  border: 2px solid var(--panel);
}

.env-rotation:hover::-moz-range-thumb { background: var(--accent); }

@media (max-width: 700px) {
  .env-rotation { width: 64px; }
}

.env-select {
  height: 34px;
  padding: 0 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font: inherit;
  font-size: 13px;
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
}

.env-select option {
  background: var(--panel);
  color: var(--text);
}

/* --- Themed dropdown (desktop replacement for native select popups) --- */

.dropdown { position: relative; }
.dropdown select { display: none; } /* desktop: the custom UI drives it */

.dropdown__button {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: color var(--transition);
}

.dropdown__button:hover { color: var(--accent); }
.dropdown__button svg { color: var(--text-faint); }

.dropdown__menu {
  position: absolute;
  top: calc(100% + 12px);
  right: -12px;
  z-index: 60;
  min-width: 150px;
  padding: 5px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.dropdown__item {
  padding: 8px 12px;
  border-radius: 5px;
  color: var(--text-dim);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.dropdown__item:hover { background: var(--panel-raised); color: var(--text); }

.dropdown__item.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}

@media (max-width: 900px) {
  /* Phones use the native picker — hide the custom UI, show the select */
  .dropdown select { display: block; }
  .dropdown__button,
  .dropdown__menu { display: none !important; }
}

.env-select:hover,
.env-select:focus {
  color: var(--text);
  border-color: var(--accent);
  outline: none;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition),
              background var(--transition), transform var(--transition);
}


.icon-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--panel-raised);
  transform: translateY(-1px);
}

.icon-btn:active { transform: translateY(0); }

/* --- Breadcrumbs --- */

.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
}

.breadcrumbs__item { overflow: hidden; text-overflow: ellipsis; }
.breadcrumbs__item--current { color: var(--text); font-weight: 600; }
.breadcrumbs__sep { color: var(--text-faint); flex-shrink: 0; }

/* --- Viewport --- */

.viewport {
  position: relative;
  flex: 1;
  min-height: 0;
  margin: 0 16px;
  background:
    radial-gradient(ellipse at 50% 40%, #1b1b1b 0%, var(--bg) 75%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.viewport canvas {
  position: absolute;
  inset: 0;
  display: block;
  outline: none;
}

.viewport:fullscreen { border-radius: 0; margin: 0; }

.viewport__hint {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  padding: 4px 14px;
  font-size: 11px;
  color: var(--text-faint);
  background: rgba(20, 20, 20, 0.65);
  border: 1px solid var(--border);
  border-radius: 99px;
  pointer-events: none;
  opacity: 0.9;
  transition: opacity 400ms ease;
}

.viewport:hover .viewport__hint { opacity: 0.35; }

/* --- Loading / error overlay --- */

.overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: grid;
  place-items: center;
  background: rgba(20, 20, 20, 0.78);
  backdrop-filter: blur(3px);
}

.overlay[hidden] { display: none; }

.overlay__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 340px;
  padding: 30px 36px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  text-align: center;
}

.spinner {
  width: 38px;
  height: 38px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.overlay__title { font-weight: 600; }

.dots {
  display: flex;
  gap: 9px;
  padding: 12px 0;
}

.dots[hidden] { display: none; }

.dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: dot-bounce 1.1s ease-in-out infinite;
}

.dots span:nth-child(2) { animation-delay: 0.15s; }
.dots span:nth-child(3) { animation-delay: 0.3s; }

@keyframes dot-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.45; }
  50%      { transform: translateY(-7px); opacity: 1; }
}

.progress {
  width: 220px;
  height: 5px;
  background: var(--bg);
  border-radius: 99px;
  overflow: hidden;
}

.progress__bar {
  width: 0%;
  height: 100%;
  background: var(--accent);
  border-radius: 99px;
  transition: width 150ms ease;
}

.progress__bar.is-indeterminate {
  width: 40%;
  animation: indeterminate 1.1s ease-in-out infinite;
}

@keyframes indeterminate {
  0%   { margin-left: -40%; }
  100% { margin-left: 100%; }
}

.overlay__percent {
  font-size: 12px;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}

.overlay__message { margin: 0; color: var(--text-dim); font-size: 13px; }

.btn {
  padding: 8px 22px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.btn--accent { background: var(--accent); border-color: var(--accent); color: #141414; }
.btn--accent:hover { background: #ffa033; border-color: #ffa033; transform: translateY(-1px); }

/* --- Model info panel --- */

.model-info {
  flex-shrink: 0;
  margin: 14px 16px 16px;
  padding: 16px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.model-info__header {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.model-info__name {
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.model-info__category {
  padding: 3px 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(255, 140, 0, 0.35);
  border-radius: 99px;
}

.model-info__description {
  margin: 8px 0 0;
  color: var(--text-dim);
  max-width: 72ch;
}

.model-info__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.stat {
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition);
}

.stat:hover { border-color: #454545; }

.stat__label {
  display: block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.stat__value {
  font-size: 14px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.model-info__placeholder { margin: 0; color: var(--text-faint); }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1100px) {
  .model-info__stats { grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); }
}

/* Mobile-only control strip between viewport and info panel.
   The scene controls (environment, lighting, graphics) are re-parented
   here from the toolbar on small screens by app.js. */
.mobile-controls { display: none; }

.browse-btn {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--panel);
  border: 1px solid rgba(255, 140, 0, 0.55);
  border-radius: 99px;
  cursor: pointer;
  transition: background var(--transition);
}

.browse-btn:active { background: var(--accent-soft); }

.control-card {
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.control-card__label {
  display: block;
  margin-bottom: 5px;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.control-card--browse {
  grid-column: 1 / -1;
  display: flex;
  padding: 6px;
}

/* Compact card variant for the desktop toolbar */
.control-card--toolbar {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 5px 12px;
}

.control-card--toolbar .control-card__label {
  margin-bottom: 2px;
  font-size: 9px;
}

.control-card--toolbar .env-select {
  height: auto;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 13px;
}

.control-card--toolbar .env-select:hover { color: var(--accent); }

.control-card--toolbar .env-rotation {
  width: 120px;
  margin: 7px 0;
}

.toolbar__actions { align-items: stretch; }
.toolbar__actions .icon-btn { align-self: center; }

@media (max-width: 900px) {
  .control-card--toolbar { display: none; }
}

/* Tablet & phone: sidebar becomes a slide-out drawer, main column scrolls */
@media (max-width: 900px) {
  .main { overflow-y: auto; }

  .viewport {
    flex: 0 0 auto;
    height: 52vh;
    min-height: 280px;
  }

  .mobile-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin: 10px 16px 0;
  }

  .mobile-controls .env-select { width: 100%; }
  .mobile-controls .env-rotation { width: 100%; margin: 10px 0 6px; }

  .browse-btn {
    display: inline-flex;
    justify-content: center;
    width: 100%;
    border: none;
  }
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    height: 100dvh;
    width: min(320px, 86vw) !important;
    min-width: 0;
    transform: translateX(-105%);
    transition: transform 240ms cubic-bezier(0.25, 0.8, 0.35, 1);
    box-shadow: var(--shadow);
  }

  .sidebar.is-open { transform: translateX(0); }
  .sidebar__resizer { display: none; }
  .toolbar__menu { display: grid; }
  .viewport__hint { display: none; }
}

@media (max-width: 560px) {
  .toolbar { padding: 0 10px; }
  .viewport { margin: 0 10px; }
  .model-info { margin: 10px; padding: 12px 14px; }
  .model-info__name { font-size: 16px; }
  .model-info__stats { grid-template-columns: repeat(2, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation-duration: 0.01ms !important; }
}