:root {
  --ink: #eef3f6;
  --glass: rgba(18, 26, 32, 0.42);
  --glass-edge: rgba(255, 255, 255, 0.16);
  --accent: #ffd9a8;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #1b242b;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
  font-family: ui-rounded, "SF Pro Rounded", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: block;
  touch-action: none;
}

#ui { position: fixed; inset: 0; pointer-events: none; }

.wordmark {
  position: absolute;
  top: calc(env(safe-area-inset-top) + 14px);
  left: calc(env(safe-area-inset-left) + 18px);
  color: rgba(40, 52, 60, 0.42);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: opacity 0.4s ease;
}

.toolbar {
  position: absolute;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 18px);
  transform: translateX(-50%);
  display: flex;
  gap: 4px;
  padding: 5px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  backdrop-filter: blur(14px) saturate(1.2);
  pointer-events: auto;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.toolbar button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 7px;
  min-height: 44px;
  padding: 0 16px 0 13px;
  border-radius: 999px;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: background 0.2s ease;
}
.toolbar button:active { background: rgba(255, 255, 255, 0.14); }
.toolbar button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.toolbar button[aria-pressed="true"] { background: rgba(255, 217, 168, 0.22); color: var(--accent); }

.toolbar svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Get out of the way while the user is thinking with their finger. */
#ui.drawing .toolbar { opacity: 0.12; transform: translateX(-50%) translateY(6px); pointer-events: none; }
#ui.drawing .wordmark { opacity: 0; }

#toast {
  position: absolute;
  left: 50%;
  bottom: calc(env(safe-area-inset-bottom) + 84px);
  transform: translate(-50%, 8px);
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--glass-edge);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  color: var(--ink);
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
#toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 360px) {
  .toolbar button { padding: 0 12px 0 10px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .toolbar, #toast, .wordmark { transition: none; }
}