:root {
  --ink: #14171c;
  --ink-soft: #1c2129;
  --panel: rgba(18, 22, 28, 0.82);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text: #f3f1ec;
  --text-dim: #9aa3b0;
  --brass: #c9a66b;
  --brass-soft: rgba(201, 166, 107, 0.18);
  --mist: #6b7380;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body, #app {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0b0d11;
  color: var(--text);
}

#viewport {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
  cursor: grab;
}
#viewport:active { cursor: grabbing; }

.topbar {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(8, 10, 14, 0.55), transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, rgba(201, 166, 107, 0.25), rgba(201, 166, 107, 0.05));
  border: 1px solid rgba(201, 166, 107, 0.35);
  color: var(--brass);
  font-size: 16px;
}

.brand-text h1 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.brand-text p {
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
  letter-spacing: 0.02em;
}

.topbar-meta {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}

.meta-pill {
  font-size: 11px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  backdrop-filter: blur(12px);
  font-variant-numeric: tabular-nums;
}

.meta-pill.accent {
  color: var(--brass);
  border-color: rgba(201, 166, 107, 0.35);
  background: rgba(201, 166, 107, 0.12);
}

.room-dock {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.room-chip {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 12px;
  letter-spacing: 0.04em;
  padding: 9px 14px;
  border-radius: 10px;
  cursor: pointer;
  min-width: 76px;
  text-align: left;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.room-chip:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.room-chip:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.room-chip.active {
  color: var(--brass);
  background: var(--brass-soft);
  border-color: rgba(201, 166, 107, 0.35);
}

.control-dock {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: 18px;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.control-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-label {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

.dock-divider {
  width: 1px;
  height: 22px;
  background: rgba(255, 255, 255, 0.08);
}

.segmented {
  display: flex;
  padding: 3px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.seg-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font: inherit;
  font-size: 12px;
  padding: 7px 12px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease;
}

.seg-btn:hover { color: var(--text); }

.seg-btn:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 1px;
}

.seg-btn.active {
  background: rgba(201, 166, 107, 0.2);
  color: var(--brass);
}

.icon-btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font: inherit;
  font-size: 12px;
  min-width: 42px;
  height: 34px;
  padding: 0 12px;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.icon-btn:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 2px;
}

.icon-btn[aria-pressed="true"] {
  color: var(--brass);
  border-color: rgba(201, 166, 107, 0.45);
  background: var(--brass-soft);
}

.icon-btn.ghost {
  border-color: transparent;
  color: var(--text-dim);
}

.icon-btn.ghost:hover { color: var(--text); }

#day-night .icon-night { display: none; }
#day-night[aria-pressed="true"] .icon-day { display: none; }
#day-night[aria-pressed="true"] .icon-night { display: inline; }

.hint {
  position: absolute;
  right: 20px;
  bottom: 28px;
  z-index: 5;
  font-size: 11px;
  color: rgba(243, 241, 236, 0.45);
  letter-spacing: 0.04em;
  pointer-events: none;
}

.floorplan-overlay {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  background: rgba(8, 10, 14, 0.72);
  backdrop-filter: blur(10px);
}

.floorplan-overlay[hidden] { display: none; }

#floorplan-svg {
  width: min(72vw, 420px);
  height: min(78vh, 820px);
  background: #f6f1e7;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.fp-close {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: var(--panel);
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
}

.fp-close:hover { background: rgba(255, 255, 255, 0.1); }

.loading {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: #0b0d11;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading.done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-inner {
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.loading-ring {
  width: 42px;
  height: 42px;
  margin: 0 auto 16px;
  border-radius: 50%;
  border: 2px solid rgba(201, 166, 107, 0.15);
  border-top-color: var(--brass);
  animation: spin 0.9s linear infinite;
}

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

@media (max-width: 820px) {
  .room-dock {
    left: 10px;
    top: auto;
    bottom: 96px;
    transform: none;
    flex-direction: row;
    flex-wrap: wrap;
    max-width: calc(100vw - 20px);
  }
  .room-chip { min-width: auto; padding: 8px 10px; }
  .control-dock {
    left: 10px;
    right: 10px;
    transform: none;
    flex-wrap: wrap;
    justify-content: center;
    bottom: 12px;
  }
  .hint { display: none; }
  .brand-text p { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}