/* ===========================================================================
   3D building configurator — full-viewport workspace.
   Inherits the tokens and glass recipe from style.css.
   =========================================================================== */

.builder-body { height: 100%; overflow: hidden; display: flex; flex-direction: column; }
html:has(.builder-body) { height: 100%; }

.builder-topbar { flex: none; }
.builder-title { font-size: 1.0625rem; letter-spacing: -0.01em; }
.builder-subtitle { font-size: 0.75rem; color: var(--fg-dim); font-family: var(--font-mono); }

.save-state { font-size: 0.75rem; color: var(--fg-dim); min-width: 9ch; text-align: right; }
.save-state[data-state='saved'] { color: var(--ok); }
.save-state[data-state='dirty'] { color: var(--warn); }
.save-state[data-state='saving'] { color: var(--info); }
.save-state[data-state='error'] { color: var(--crit); }

/* ---------- layout ---------- */
.builder-layout {
  flex: 1; min-height: 0;
  display: grid;
  grid-template-columns: 264px minmax(0, 1fr) 312px;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4) var(--space-4);
}

/* ---------- left panel: the three numbered steps ---------- */
.panel {
  display: flex; flex-direction: column; gap: var(--space-4);
  padding: var(--space-4); min-height: 0; overflow-y: auto;
}
.panel__section { display: grid; gap: var(--space-3); }
.panel .field-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
/* The palette list sizes to its content and the panel scrolls. Making the
   section flex-grow as well gave the list a height of zero in a panel that was
   already scrolling, which hid every item below the fold. */
.panel__section--grow { flex: 0 0 auto; }
.panel__title {
  font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--fg-dim);
}
.panel__hint { font-size: 0.75rem; color: var(--fg-dim); line-height: 1.45; }
.panel__context {
  font-size: 0.75rem; line-height: 1.4; padding: var(--space-2);
  border-radius: var(--radius-sm); border: 1px solid var(--border);
}
.panel__context[data-state='ok'] { color: var(--fg-muted); background: rgba(255,255,255,0.04); }
.panel__context[data-state='blocked'] {
  color: #fcd34d; background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.4);
}

/* ---------- floor picker ---------- */
.floor-picker { display: grid; gap: 4px; }
.floor-btn {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  min-height: 34px; padding: 0 var(--space-3);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: rgba(8,12,23,0.45); color: var(--fg-muted);
  font-size: 0.8125rem; font-weight: 500; cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.floor-btn:hover { color: var(--fg); border-color: var(--border-strong); }
.floor-btn.is-active { background: var(--brand); border-color: var(--brand); color: #fff; }
.floor-btn__count {
  min-width: 20px; padding: 0 5px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.18); font-family: var(--font-mono);
  font-size: 0.6875rem; text-align: center;
}

/* ---------- size control ---------- */
.size-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2);
  padding: var(--space-3); border-radius: var(--radius-sm);
  border: 1px solid var(--border); background: rgba(8, 12, 23, 0.4);
}
.size-row .panel__hint { grid-column: 1 / -1; margin: 0; }
.size-row[data-state='blocked'] { border-color: rgba(245,158,11,0.45); }
.size-row[data-state='blocked'] .panel__hint { color: #fcd34d; }

/* ---------- palette ---------- */
.palette__tabs {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px;
  padding: 3px; border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border);
}
.palette__tab {
  min-height: 32px; border: 0; border-radius: var(--radius-pill);
  background: transparent; color: var(--fg-muted);
  font-size: 0.6875rem; font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.palette__tab:hover { color: var(--fg); background: rgba(255, 255, 255, 0.08); }
.palette__tab.is-active { background: var(--brand); color: #fff; }

.palette__items {
  display: grid; gap: var(--space-2); padding-right: 2px;
}
.palette__item {
  display: flex; flex-direction: column; gap: 1px;
  padding: var(--space-2) var(--space-3); text-align: left;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: rgba(8, 12, 23, 0.45); color: var(--fg); cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.palette__item:hover { border-color: var(--border-strong); background: rgba(255, 255, 255, 0.06); }
.palette__item.is-active {
  border-color: var(--brand); background: var(--brand-soft);
  box-shadow: 0 0 0 1px var(--brand);
}
.palette__item-label { font-size: 0.875rem; font-weight: 500; }
.palette__item-hint { font-size: 0.6875rem; color: var(--fg-dim); }

.palette__hint { font-size: 0.75rem; color: var(--fg-dim); line-height: 1.45; }

/* ---------- stage ---------- */
.stage {
  position: relative; min-height: 0; overflow: hidden;
  border-radius: var(--radius-lg); border: 1px solid var(--border);
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(56, 93, 148, 0.18), transparent 70%),
              rgba(8, 12, 23, 0.55);
}
#builderCanvas { display: block; width: 100%; height: 100%; touch-action: none; }

.stage__toolbar {
  position: absolute; top: var(--space-3); left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: var(--space-1);
  padding: var(--space-1); border-radius: var(--radius-pill); z-index: 2;
}
.tool-btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: 34px; padding: 0 var(--space-3);
  border: 0; border-radius: var(--radius-pill);
  background: transparent; color: var(--fg-muted);
  font-size: 0.8125rem; font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.tool-btn:hover { color: var(--fg); background: rgba(255, 255, 255, 0.1); }
.tool-btn.is-active { background: var(--brand); color: #fff; }
.tool-sep { width: 1px; height: 20px; background: var(--border-strong); margin: 0 2px; }

.stage__hint {
  position: absolute; left: 50%; bottom: var(--space-3); transform: translateX(-50%);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-pill);
  font-size: 0.75rem; color: var(--fg-dim); pointer-events: none; z-index: 2;
}

/* ---------- inspector ---------- */
.inspector {
  display: flex; flex-direction: column; gap: var(--space-4);
  padding: var(--space-4); min-height: 0; overflow-y: auto;
}
.inspector__empty h2, .inspector__name { font-size: 1.0625rem; }
.inspector__empty p { font-size: 0.8125rem; color: var(--fg-muted); margin-top: var(--space-2); line-height: 1.5; }
.inspector__kind {
  font-size: 0.6875rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--fg-dim);
}
.inspector__facts { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); margin: var(--space-3) 0; }
.inspector__facts dt {
  font-size: 0.6875rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-dim);
}
.inspector__facts dd { margin: 0; font-family: var(--font-mono); font-size: 0.9375rem; }

.inspector__link { border-top: 1px solid var(--border); padding-top: var(--space-3); display: grid; gap: var(--space-2); }
.inspector__link h3 { font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg-dim); }
.inspector__actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.tank-select {
  width: 100%; min-height: 40px; padding: 0 var(--space-3);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: rgba(8, 12, 23, 0.7); color: var(--fg);
}
.tank-select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }

.linked-tank {
  display: grid; gap: var(--space-2); padding: var(--space-3);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.03);
}
.linked-tank__row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); }
.linked-tank__label { font-size: 0.8125rem; font-weight: 500; }
.linked-tank__level { display: flex; align-items: baseline; gap: 4px; }
.linked-tank__pct { font-family: var(--font-mono); font-size: 1.75rem; font-weight: 500; }
.linked-tank__unit { color: var(--fg-muted); }

.inspector__summary { margin-top: auto; border-top: 1px solid var(--border); padding-top: var(--space-3); }
.inspector__summary h3 {
  font-size: 0.75rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--fg-dim); margin-bottom: var(--space-2);
}
.usage-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); font-size: 0.8125rem; }
.usage-item {
  display: grid; grid-template-columns: 1fr auto; gap: 2px var(--space-2);
  padding: var(--space-2); border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border);
}
.usage-item__tank { font-weight: 500; }
.usage-item__count {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--fg-dim);
  align-self: center;
}
.usage-item__list { grid-column: 1 / -1; font-size: 0.75rem; color: var(--fg-muted); }

/* ---------- the dashboard's entry point ---------- */
.builder-link { display: inline-flex; align-items: center; gap: var(--space-2); }

/* ---------- narrow screens ---------- */
@media (max-width: 1180px) {
  html:has(.builder-body), .builder-body { height: auto; overflow: visible; }
  .builder-layout { grid-template-columns: 1fr; }
  .stage { height: 62vh; min-height: 420px; }
  .palette__items { max-height: none; }
  .inspector { max-height: none; }
}

/* ---------- walkthrough ---------- */

/* ---------- number inputs sit tighter than the old sliders ---------- */
.field input[type='number'] {
  min-height: 40px; padding: 0 var(--space-3);
  border: 1px solid var(--border-strong); border-radius: var(--radius-sm);
  background: rgba(8, 12, 23, 0.6); color: var(--fg);
  font-family: var(--font-mono);
}
.field input[type='number']:focus {
  outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft);
}

/* ---------- phones ---------- */
@media (max-width: 640px) {
  /* The topbar carries a logo, a title and four controls: let it stack. */
  .builder-topbar { flex-wrap: wrap; gap: var(--space-2); }
  .topbar__actions { width: 100%; justify-content: flex-end; flex-wrap: wrap; }
  .builder-layout { padding: var(--space-2); gap: var(--space-2); }
  .stage { height: 58vh; min-height: 340px; }

  /* Seven tools in one row do not fit; scroll them instead of wrapping into
     a block that eats the scene. */
  .stage__toolbar {
    left: var(--space-2); right: var(--space-2); transform: none;
    max-width: none; overflow-x: auto; flex-wrap: nowrap;
    scrollbar-width: none;
  }
  .stage__toolbar::-webkit-scrollbar { display: none; }
  .tool-btn { flex: 0 0 auto; }
  .stage__hint { display: none; }

  .field-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .palette__tabs { grid-template-columns: repeat(2, 1fr); }
}

@media (pointer: coarse) {
  .tool-btn { min-height: 40px; }
  .floor-btn { min-height: 40px; }
  .palette__tab { min-height: 38px; }
}

/* On a phone the walkthrough takes the screen: the editing panels are no use
   while you are inside the building, and the stage would otherwise sit below
   the fold in a shell that does not scroll. */
@media (max-width: 640px) {
  .builder-body.is-walking .stage {
    position: fixed; inset: 0; z-index: 80;
    height: 100dvh; min-height: 0; border-radius: 0;
  }
  .builder-body.is-walking .panel,
  .builder-body.is-walking .inspector,
  .builder-body.is-walking .builder-topbar { display: none; }
}