:root {
  --bg: #0a0e13;
  --panel: #121821;
  --panel-2: #0e141c;
  --line: #232c38;
  --text: #e7edf3;
  --muted: #8b97a5;
  --coral: #ff6a3d;
  --coral-dim: #c8431d;
  --lime: #9fe870;
  --radius: 10px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: Inter, system-ui, sans-serif;
  display: flex; flex-direction: column;
  overflow: hidden;
}
kbd {
  font-family: 'JetBrains Mono', monospace; font-size: 10px;
  background: #0006; border: 1px solid var(--line); border-radius: 4px;
  padding: 1px 5px; color: var(--muted);
}

/* ---- top bar ---- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: linear-gradient(180deg, #141b25, #0e141c);
  border-bottom: 1px solid var(--line); gap: 16px; flex-wrap: wrap;
}
.brand { display: flex; align-items: baseline; gap: 12px; }
.logo { font-weight: 800; font-size: 22px; letter-spacing: -0.5px; }
.logo .accent { color: var(--coral); }
.brand .sub { color: var(--muted); font-size: 12px; letter-spacing: 1px; text-transform: uppercase; }

.tools { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.tbtn {
  background: #1a2230; color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 12px; font-size: 13px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px; transition: 0.15s;
}
.tbtn:hover { background: #232e3e; border-color: #34465c; transform: translateY(-1px); }
.tbtn:active { transform: translateY(0); }
.tbtn.danger:hover { border-color: var(--coral-dim); background: #2a1813; }
.tbtn.file { cursor: pointer; }
.divider { width: 1px; height: 22px; background: var(--line); margin: 0 4px; }

/* ---- layout ---- */
.layout { flex: 1; display: grid; grid-template-columns: 210px 1fr 1fr; min-height: 0; }
.panel { background: var(--panel); border-right: 1px solid var(--line); display: flex; flex-direction: column; min-height: 0; }
.panel-title { padding: 12px 16px 6px; font-size: 11px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted); }

.palette { flex: 1; overflow-y: auto; padding: 4px 10px 10px; }
.pal-head { font-size: 10px; letter-spacing: 1px; text-transform: uppercase; color: #5f6b79; margin: 14px 4px 6px; }
.pal-item {
  width: 100%; text-align: left; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 10px; margin-bottom: 5px;
  font-size: 12.5px; cursor: pointer; display: flex; align-items: center; gap: 9px; transition: 0.12s;
}
.pal-item:hover { background: #19222e; border-color: #34465c; transform: translateX(2px); }
.swatch { width: 13px; height: 13px; border-radius: 3px; box-shadow: 0 0 0 1px #0006 inset; flex: none; }
.hint { padding: 10px 14px; font-size: 11px; color: var(--muted); border-top: 1px solid var(--line); line-height: 1.6; }

.stage-wrap, .view-wrap { position: relative; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
.stage-wrap { background: #0b0f15; border-right: 1px solid var(--line); }
.view-wrap { background: #0d1117; }
.pane-label {
  position: absolute; top: 10px; left: 12px; z-index: 5;
  font-size: 10px; letter-spacing: 1.5px; text-transform: uppercase; color: var(--muted);
  background: #0008; padding: 4px 8px; border-radius: 6px; border: 1px solid var(--line);
  pointer-events: none;
}
.canvas2d { flex: 1; overflow: auto; display: flex; align-items: center; justify-content: center; padding: 28px 8px 8px; }
.view3d { flex: 1; min-height: 0; }
.view3d canvas { display: block; }

/* ---- status ---- */
.statusbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 7px 16px; background: #0e141c; border-top: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace; font-size: 12px;
}
#sel-info { color: var(--lime); }
.muted { color: var(--muted); }

/* ---- toast ---- */
.toast {
  position: fixed; bottom: 50px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: #1a2230; border: 1px solid #34465c; color: var(--text);
  padding: 10px 18px; border-radius: 10px; font-size: 13px; opacity: 0; pointer-events: none;
  transition: 0.25s; box-shadow: 0 8px 30px #000a;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 1100px) {
  .layout { grid-template-columns: 180px 1fr; grid-template-rows: 1fr 1fr; }
  .view-wrap { grid-column: 1 / -1; border-top: 1px solid var(--line); }
}