:root {
  --panel: #161410;
  --panel-border: #3a342c;
  --text: #f3efe6;
  --muted: #b4aa98;
  --accent: #e8b86d;
  --control: #221e18;
  --control-hover: #2e2921;
  --radius: 2px;
  color-scheme: dark;
  font-family: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  height: 100dvh;
  background: #0c0b09;
  color: var(--text);
  overflow: hidden;
  overscroll-behavior: none;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
}

#fluid-root {
  position: fixed;
  inset: 0;
  overflow: hidden;
}
#fluid-root canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  touch-action: none;
}

.panel {
  position: fixed;
  top: 12px;
  right: 12px;
  width: min(340px, calc(100vw - 16px));
  max-height: calc(100dvh - 24px);
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 14px;
  padding-bottom: max(14px, env(safe-area-inset-bottom));
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  z-index: 10;
  touch-action: pan-y;
}

.panel.hidden { display: none; }
.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 6px;
}
.panel h1 { margin: 0; font-size: 1.05rem; }
.panel-head #hide {
  flex: 0 0 auto;
  min-width: 64px;
  padding: 6px 10px;
}
.panel p, .hint {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.4;
}

.field { display: grid; gap: 6px; margin-bottom: 10px; }
.field > span, .field > label, label {
  font-size: 0.75rem;
  color: var(--muted);
}

.control {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.control input[type="range"] {
  flex: 1;
  min-width: 0;
  width: auto;
}

input[type="text"], select, textarea, button {
  font: inherit;
  color: var(--text);
  background: var(--control);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
}

input[type="text"], select {
  width: 100%;
  padding: 8px 10px;
}

select {
  color-scheme: dark;
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px;
  background-repeat: no-repeat;
}

select option, select optgroup {
  background: #221e18;
  color: #f3efe6;
}

textarea {
  width: 100%;
  min-height: 64px;
  padding: 8px;
  resize: vertical;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 0 0 12px;
}

button, .file-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 10px;
  cursor: pointer;
  text-align: center;
}

button:hover, .file-btn:hover, button:focus-visible {
  background: var(--control-hover);
  outline: 1px solid var(--accent);
}

fieldset {
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  margin: 0 0 12px;
  padding: 10px;
}

legend {
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  color: var(--text);
}

.value {
  min-width: 36px;
  text-align: right;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  font-size: 0.75rem;
}

.status {
  font-size: 0.75rem;
  color: var(--accent);
  min-height: 1.1em;
}

.credit {
  position: fixed;
  left: max(12px, env(safe-area-inset-left));
  bottom: max(10px, env(safe-area-inset-bottom));
  z-index: 9;
  max-width: min(420px, calc(100vw - 96px));
  margin: 0;
  padding: 6px 8px;
  background: rgba(22, 20, 16, 0.82);
  border: 1px solid var(--panel-border);
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.35;
}

.credit a {
  color: var(--accent);
  text-decoration: none;
}

.credit a:hover,
.credit a:focus-visible {
  text-decoration: underline;
}

.fab {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  z-index: 11;
  min-width: 56px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: var(--radius);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  touch-action: manipulation;
}
.fab.hidden { display: none; }

@media (max-width: 640px) {
  .credit {
    top: max(8px, env(safe-area-inset-top));
    bottom: auto;
    max-width: calc(100vw - 24px);
  }

  .panel {
    top: auto;
    left: 8px;
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    width: auto;
    max-height: min(52dvh, calc(100dvh - 24px));
  }

  button, .file-btn, select, input[type="text"] {
    min-height: 44px;
  }

  .toggle {
    min-height: 40px;
  }
}