:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel-2: #1c2230;
  --line: #293040;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f9cf9;
  --accent-2: #2f7be0;
  --ok: #3fb950;
}

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

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.topbar {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.brand { display: flex; align-items: center; gap: 8px; }
.brand .dot {
  width: 10px; height: 10px; border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.muted { color: var(--muted); }
.small { font-size: 12px; }

.topbar-actions { display: flex; align-items: center; gap: 12px; }
.stats { font-variant-numeric: tabular-nums; }

.btn {
  border: 1px solid var(--line);
  background: var(--panel-2);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 8px;
  cursor: pointer;
  font: inherit;
}
.btn:hover { border-color: #3a445a; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #04121f; font-weight: 600; }
.btn.primary:hover { background: #66abff; }
.btn:disabled { opacity: .45; cursor: not-allowed; }

.layout {
  height: calc(100% - 52px);
  display: grid;
  grid-template-columns: 320px 1fr;
}

.panel {
  border-right: 1px solid var(--line);
  background: var(--panel);
  padding: 14px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.group { display: flex; flex-direction: column; gap: 8px; }
.group.hidden, .mode-block.hidden { display: none; }

.drop {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 4px;
  border: 1.5px dashed var(--line);
  border-radius: 12px;
  padding: 22px 12px;
  cursor: pointer;
  text-align: center;
  transition: border-color .15s, background .15s;
}
.drop:hover, .drop.hot { border-color: var(--accent); background: rgba(79,156,249,.06); }
.drop-title { font-weight: 600; }

label { color: var(--text); }
.row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.row label { font-size: 13px; color: var(--muted); }
.val { color: var(--text); font-variant-numeric: tabular-nums; font-size: 13px; }

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.num {
  width: 84px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 7px;
  padding: 6px 8px;
  font: inherit;
  text-align: right;
}

.sel {
  background: var(--panel-2);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 7px;
  padding: 6px 8px;
  font: inherit;
  cursor: pointer;
}

.smooth-only { display: flex; flex-direction: column; gap: 8px; }
.smooth-only.hidden { display: none; }

.base-block { display: flex; flex-direction: column; gap: 8px; }
.base-block.hidden { display: none; }

.check { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; cursor: pointer; }
.check input { accent-color: var(--accent); }

.seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 4px;
}
.seg-btn {
  border: 0; background: transparent; color: var(--muted);
  padding: 8px; border-radius: 6px; cursor: pointer; font: inherit;
}
.seg-btn.active { background: var(--accent); color: #04121f; font-weight: 600; }

.hint { margin: 0; }

.viewer { display: flex; flex-direction: column; overflow: hidden; }
.views {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1.4fr;
  gap: 10px;
  padding: 14px;
  overflow: hidden;
}
.view {
  margin: 0;
  display: flex; flex-direction: column; gap: 6px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px;
  overflow: hidden;
}
.view.wide { grid-column: 1 / -1; }
.view figcaption { font-size: 12px; color: var(--muted); }
.view canvas {
  flex: 1;
  width: 100%;
  min-height: 0;
  border-radius: 8px;
  background: #0a0d12;
  display: block;
  object-fit: contain;
}
canvas.pixelated { image-rendering: pixelated; }

.status { padding: 0 16px 12px; }

.drop-overlay {
  position: fixed; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(14,17,22,.82);
  font-size: 22px; font-weight: 600;
  z-index: 50;
}
.drop-overlay.hidden { display: none; }