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

:root {
  --panel-bg: rgba(10, 12, 18, 0.82);
  --accent: #ffb45e;
  --text: #cdd3e0;
  --text-dim: #6b7387;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #000;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  color: var(--text);
}

#view {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  display: block;
  cursor: grab;
}
#view:active { cursor: grabbing; }

/* ---------- 标题 ---------- */
#title {
  position: fixed; top: 22px; left: 28px;
  pointer-events: none;
  user-select: none;
}
#title h1 {
  font-size: 22px; font-weight: 200;
  letter-spacing: 0.55em;
  color: #f0e8d8;
  text-shadow: 0 0 18px rgba(255, 180, 94, .35);
}
#title p {
  margin-top: 6px;
  font-size: 11px; letter-spacing: .25em;
  color: var(--text-dim);
}

/* ---------- 底部提示 ---------- */
#hint {
  position: fixed; bottom: 18px; left: 50%;
  transform: translateX(-50%);
  font-size: 11px; letter-spacing: .12em;
  color: var(--text-dim);
  user-select: none; pointer-events: none;
  white-space: nowrap;
}
#hint i { margin: 0 10px; font-style: normal; opacity: .4; }

#fps {
  position: fixed; bottom: 18px; left: 24px;
  font-size: 11px; font-variant-numeric: tabular-nums;
  color: var(--text-dim);
  user-select: none; pointer-events: none;
}

/* ---------- 侧栏 ---------- */
#panel {
  position: fixed; top: 0; right: 0;
  width: 292px; height: 100%;
  padding: 18px 18px 14px;
  background: var(--panel-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-left: 1px solid rgba(255, 255, 255, .06);
  overflow-y: auto;
  transition: transform .3s ease;
  z-index: 10;
}
#panel.hidden { transform: translateX(100%); }
#panel::-webkit-scrollbar { width: 6px; }
#panel::-webkit-scrollbar-thumb { background: rgba(255,255,255,.12); border-radius: 3px; }

.panel-head {
  font-size: 12px; letter-spacing: .2em;
  color: #e8dfd0;
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 14px;
}
.panel-head .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}

/* 预设按钮 */
.presets {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
  margin-bottom: 18px;
}
.presets button {
  padding: 7px 4px;
  font-size: 11px; letter-spacing: .1em;
  color: var(--text);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .09);
  border-radius: 6px;
  cursor: pointer;
  transition: all .18s;
}
.presets button:hover {
  border-color: rgba(255, 180, 94, .5);
  color: #ffd9a8;
  background: rgba(255, 180, 94, .08);
}
.presets button.active {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255, 180, 94, .12);
}

/* 分组 */
.group { margin-bottom: 16px; }
.group-title {
  font-size: 10px; letter-spacing: .3em;
  color: var(--text-dim);
  margin-bottom: 8px;
  padding-bottom: 5px;
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}

/* 滑杆行 */
.ctl { margin-bottom: 10px; }
.ctl .row {
  display: flex; justify-content: space-between;
  font-size: 11.5px;
  margin-bottom: 4px;
}
.ctl .row .val {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-size: 11px;
}
.ctl input[type="range"] {
  width: 100%; height: 14px;
  -webkit-appearance: none; appearance: none;
  background: transparent;
  cursor: pointer;
}
.ctl input[type="range"]::-webkit-slider-runnable-track {
  height: 3px; border-radius: 2px;
  background: rgba(255, 255, 255, .13);
}
.ctl input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--accent);
  margin-top: -4px;
  box-shadow: 0 0 6px rgba(255, 180, 94, .6);
}
.ctl input[type="range"]::-moz-range-track {
  height: 3px; border-radius: 2px;
  background: rgba(255, 255, 255, .13);
}
.ctl input[type="range"]::-moz-range-thumb {
  width: 11px; height: 11px; border: none; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px rgba(255, 180, 94, .6);
}

.panel-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 6px;
  border-top: 1px solid rgba(255,255,255,.05);
}
.chk {
  font-size: 11.5px; display: flex; align-items: center; gap: 6px;
  cursor: pointer; user-select: none;
}
.chk input { accent-color: var(--accent); }
#resetview {
  padding: 5px 12px;
  font-size: 11px;
  color: var(--text);
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 5px;
  cursor: pointer;
}
#resetview:hover { color: #ffd9a8; border-color: rgba(255,180,94,.5); }

/* 收起按钮 */
#paneltoggle {
  position: fixed; top: 18px; right: 306px;
  width: 26px; height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(10,12,18,.7);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  z-index: 11;
  transition: all .3s;
}
#paneltoggle:hover { color: var(--accent); border-color: var(--accent); }
#paneltoggle.shifted { right: 14px; transform: rotate(180deg); }