:root {
  --bg: #0a0e14;
  --surface: #141b24;
  --border: #2a3441;
  --text: #e7edf4;
  --muted: #8b98a8;
  --accent: #3b82f6;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  height: 100vh;
  font-family: "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow: hidden;
}
.bar {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.bar h1 { margin: 0.25rem 0 0; font-size: 1.15rem; }
.bar .hint { margin: 0.2rem 0 0; color: var(--muted); font-size: 0.85rem; }
.back { color: var(--accent); text-decoration: none; font-size: 0.9rem; }

.layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  height: calc(100vh - 86px);
}
.sidebar {
  padding: 1rem;
  border-right: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  overflow-y: auto;
  min-height: 0;
}
.step { display: grid; gap: 0.5rem; }
.step-title { margin: 0; font-size: 0.75rem; color: var(--muted); text-transform: uppercase; }
label { display: grid; gap: 0.35rem; font-size: 0.8rem; color: var(--muted); }
.inline-check {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
select, input[type="range"], input[type="number"] { width: 100%; }
.meta, .status { margin: 0; font-size: 0.76rem; color: var(--muted); line-height: 1.35; word-break: break-word; }
.step button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 7px;
  padding: 0.45rem 0.55rem;
  cursor: pointer;
}
.step button:hover { color: var(--text); border-color: var(--accent); }
.value-label { color: var(--text); font-size: 0.78rem; }
.hidden { display: none !important; }

.channel-list { display: grid; gap: 0.65rem; }
.channel-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem;
  display: grid;
  gap: 0.45rem;
}
.channel-top {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
}
.channel-name { display: flex; align-items: center; gap: 0.4rem; color: var(--text); }
.mask-state {
  color: var(--muted);
  font-size: 0.72rem;
}
.lut-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}
.btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.4rem;
}
.btn-row button {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 7px;
  padding: 0.42rem 0.5rem;
  cursor: pointer;
}
.btn-row button:hover { color: var(--text); border-color: var(--accent); }
#time-play-row .btn-row {
  grid-template-columns: minmax(0, 1fr) 92px 100px;
  align-items: end;
}
#time-play-status {
  margin-top: 0.35rem;
}
#hist-canvas {
  width: 100%;
  height: 100px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #0b1118;
}
.hist-scale {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1;
}

.viewport-wrap {
  position: relative;
  overflow: hidden;
  background: #000;
  min-height: 0;
}
#slice-canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}
.slice-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: none;
  pointer-events: none;
  touch-action: none;
}
.slice-overlay.visible {
  display: block;
}
.viewport-hint {
  position: absolute;
  right: 1rem;
  bottom: 0.8rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.78rem;
  pointer-events: none;
}
.renderer-badge {
  position: absolute;
  left: 0.8rem;
  top: 0.8rem;
  margin: 0;
  padding: 0.22rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(20, 27, 36, 0.84);
  color: var(--text);
  font-size: 0.72rem;
  pointer-events: none;
}

.z-step-row {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

.controls-backdrop,
.controls-close-btn,
.mobile-controls-btn {
  display: none;
}

.meta-dialog {
  width: min(920px, 92vw);
  height: min(80vh, 760px);
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
}
.meta-dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}
.meta-dialog-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.meta-dialog-head h2 {
  margin: 0;
  font-size: 1rem;
}
.meta-dialog-content {
  margin: 0;
  height: calc(100% - 36px);
  overflow: auto;
  font-size: 0.78rem;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem;
  white-space: pre-wrap;
  word-break: break-word;
  background: #0b1118;
}
.meta-summary {
  margin: 0 0 0.75rem 0;
  color: var(--text);
  white-space: pre-wrap;
}
.meta-raw details {
  margin-top: 0.4rem;
}
.meta-raw summary {
  cursor: pointer;
  color: var(--accent);
  user-select: none;
}
.meta-raw pre {
  margin: 0.5rem 0 0 0;
  white-space: pre-wrap;
  color: var(--muted);
}

@media (max-width: 768px) {
  body {
    height: 100dvh;
    overflow: hidden;
  }

  .bar {
    padding: 0.7rem 0.9rem;
  }

  .bar h1 {
    font-size: 1rem;
  }

  .layout {
    display: block;
    height: calc(100dvh - 64px);
    overflow: hidden;
  }

  .viewport-wrap {
    height: 100%;
    min-height: 0;
  }

  .viewport-hint {
    left: 0.75rem;
    right: 5.5rem;
    bottom: 0.65rem;
    font-size: 0.72rem;
  }

  .renderer-badge {
    top: 0.65rem;
    left: 0.75rem;
    right: auto;
    max-width: calc(100% - 1.5rem);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .mobile-controls-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    right: 0.75rem;
    bottom: 0.65rem;
    z-index: 12;
    min-height: 44px;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: rgba(20, 27, 36, 0.92);
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  }

  .controls-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 80;
    background: rgba(0, 0, 0, 0.45);
  }

  body.controls-open .controls-backdrop {
    display: block;
  }

  .sidebar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 90;
    max-height: min(78dvh, 560px);
    border-right: none;
    border-top: 1px solid var(--border);
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -10px 36px rgba(0, 0, 0, 0.42);
    transform: translateY(100%);
    transition: transform 0.22s ease;
    padding-top: 2.4rem;
    padding-bottom: calc(0.85rem + env(safe-area-inset-bottom, 0px));
  }

  body.controls-open .sidebar {
    transform: translateY(0);
  }

  .controls-close-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 0.55rem;
    right: 0.75rem;
    min-height: 36px;
    padding: 0.35rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-size: 0.78rem;
    cursor: pointer;
  }

  .z-step-row {
    display: grid;
  }

  .z-step-row button {
    min-height: 44px;
    font-size: 1.1rem;
    font-weight: 600;
  }

  .step button,
  .btn-row button {
    min-height: 44px;
  }

  .sidebar select,
  .sidebar input[type="range"] {
    min-height: 40px;
  }
}