:root {
  --bg: #14181d;
  --panel: #1d232a;
  --panel-2: #262e37;
  --text: #eef2f5;
  --muted: #9aa6b2;
  --accent: #2fbf71;
  --accent-text: #06210f;
  --manual: #3d9bff;
  --ai: #b57bff;
  --danger: #ff6b6b;
  --radius: 12px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

body {
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: calc(env(safe-area-inset-top) + 8px) 16px 8px;
  background: var(--panel);
}
.topbar h1 { font-size: 18px; margin: 0; letter-spacing: .3px; }

.icon-btn {
  width: 40px; height: 40px;
  border: 0; border-radius: 50%;
  background: transparent; color: var(--muted);
  display: grid; place-items: center;
}
.icon-btn svg { width: 24px; height: 24px; fill: currentColor; }
.icon-btn:active { background: var(--panel-2); }

#stage {
  position: relative;
  flex: 1;
  overflow: hidden;
  touch-action: none;
}
#view { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.count-badge {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  background: rgba(10, 14, 18, .82);
  border: 2px solid var(--accent);
  border-radius: 999px;
  padding: 6px 20px;
  display: flex; align-items: baseline; gap: 8px;
  pointer-events: none;
  backdrop-filter: blur(6px);
}
#countValue { font-size: 34px; font-weight: 800; font-variant-numeric: tabular-nums; }
.count-label { color: var(--muted); font-size: 15px; }

.hint {
  position: absolute; left: 16px; right: 16px; bottom: 12px;
  background: rgba(10, 14, 18, .85);
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px; line-height: 1.35;
  pointer-events: none;
  text-align: center;
}

.empty {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 14px; padding: 24px 16px; text-align: center;
}
.empty p { color: var(--muted); max-width: 320px; margin: 0 0 8px; line-height: 1.4; }
.empty-art { color: var(--accent); width: 140px; }
.empty-art svg { width: 100%; height: auto; }

.btn {
  appearance: none;
  border: 1px solid #36404b;
  background: var(--panel-2);
  color: var(--text);
  border-radius: var(--radius);
  padding: 12px 10px;
  font: inherit; font-size: 15px; font-weight: 600;
  text-align: center;
  cursor: pointer;
  user-select: none;
}
.btn:active { filter: brightness(1.2); }
.btn:disabled { opacity: .4; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.ai { border-color: var(--ai); color: var(--ai); }
.ai-pair { display: flex; gap: 6px; min-width: 0; }
.ai-pair .btn { flex: 1; min-width: 0; padding-left: 2px; padding-right: 2px; }
.btn.ai.plus { font-weight: 800; background: color-mix(in srgb, var(--ai) 16%, transparent); }
.btn.big { width: min(320px, 100%); padding: 16px; font-size: 17px; }
.btn.active { outline: 2px solid var(--accent); outline-offset: -2px; }

.toolbar {
  background: var(--panel);
  padding: 10px 16px calc(env(safe-area-inset-bottom) + 10px);
  display: flex; flex-direction: column; gap: 10px;
}
.panel { display: flex; flex-direction: column; gap: 6px; }
.panel[hidden] { display: none; }
.slider { display: flex; flex-direction: column; gap: 2px; font-size: 14px; color: var(--muted); }
.slider output { color: var(--text); font-variant-numeric: tabular-nums; }
.slider input { width: 100%; accent-color: var(--accent); height: 28px; }
.zone-panel { flex-direction: row; gap: 8px; }
.zone-panel .btn { flex: 1; }
.actions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.actions .btn { padding: 10px 4px; font-size: 14px; }
@media (min-width: 520px) {
  .actions { grid-template-columns: repeat(6, 1fr); }
}
.btn.has-zone { border-color: #ffd23f; color: #ffd23f; }

.busy {
  position: absolute; inset: 0;
  background: rgba(10, 14, 18, .6);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
}
.spinner {
  width: 44px; height: 44px; border-radius: 50%;
  border: 4px solid #ffffff33; border-top-color: var(--accent);
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.toast {
  position: fixed; left: 16px; right: 16px; top: calc(env(safe-area-inset-top) + 64px);
  margin: 0 auto; max-width: 480px;
  background: #2a323c; border-left: 4px solid var(--accent);
  padding: 12px 14px; border-radius: 8px;
  font-size: 14px; line-height: 1.4;
  box-shadow: 0 6px 24px #0008;
  z-index: 10;
}
.toast.error { border-left-color: var(--danger); }

dialog {
  background: var(--panel); color: var(--text);
  border: 1px solid #36404b; border-radius: 16px;
  width: min(440px, calc(100vw - 32px));
  padding: 20px;
}
dialog::backdrop { background: #000a; }
dialog h2 { margin: 0 0 8px; font-size: 18px; }
dialog p { color: var(--muted); line-height: 1.45; font-size: 14px; }
.small { font-size: 12.5px !important; }
.field { display: flex; flex-direction: column; gap: 6px; font-size: 14px; }
.field input {
  font: inherit; padding: 12px; border-radius: 10px;
  border: 1px solid #36404b; background: var(--bg); color: var(--text);
}
.error-text { color: var(--danger) !important; margin: 8px 0 0; }
.dlg-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 12px; }