:root {
  --bg: #16171d;
  --panel: #1f2129;
  --panel-2: #2a2d38;
  --text: #e9e9ef;
  --muted: #9a9cab;
  --chip: #343846;
  --chip-hover: #424758;
  --accent: #6c8cff;
  --chip-w: 132px;
  --row-h: 38px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  user-select: none;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  background: var(--panel);
  border-bottom: 1px solid #000;
}
header h1 { margin: 0; font-size: 1.3rem; }

button {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid #3a3e4c;
  border-radius: 6px;
  padding: 7px 12px;
  cursor: pointer;
  font: inherit;
}
button:hover { background: var(--chip-hover); }
button.danger:hover { background: #7a2b2b; }

main { max-width: 1200px; margin: 0 auto; padding: 16px; }

/* ---------- Tiers ---------- */
#tiers {
  border: 1px solid #000;
  border-radius: 8px;
  overflow: hidden;
}

.tier {
  display: flex;
  min-height: 64px;
  border-bottom: 1px solid #000;
  background: var(--panel);
}
.tier:last-child { border-bottom: none; }

.tier-label {
  flex: 0 0 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  font-weight: 800;
  color: #111;
}

.tier-items {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 6px;
  padding: 8px;
  min-width: 0;
}

.tier.over, #pool.over { outline: 2px solid var(--accent); outline-offset: -2px; }

/* ---------- Chips ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 10px;
  background: var(--chip);
  border-radius: 6px;
  cursor: grab;
  white-space: nowrap;
  font-size: 0.95rem;
  touch-action: none;
}
.pool-row .chip {
  touch-action: pan-y;
}
.chip:hover { background: var(--chip-hover); }
.chip.dragging-src { opacity: 0.3; }
.chip.insert-before { box-shadow: -3px 0 0 var(--accent); }
.chip mark { background: #6c8cff55; color: inherit; border-radius: 2px; }

#ghost {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px #0008;
  transform: translate(-50%, -50%) rotate(-3deg);
}

/* ---------- Pool ---------- */
.pool-section { margin-top: 20px; }

.pool-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

#search {
  flex: 1;
  min-width: 200px;
  padding: 10px 14px;
  font-size: 1rem;
  background: var(--panel);
  color: var(--text);
  border: 1px solid #3a3e4c;
  border-radius: 8px;
  outline: none;
}
#search:focus { border-color: var(--accent); }

.toggle { color: var(--muted); display: flex; align-items: center; gap: 5px; cursor: pointer; }
#count { color: var(--muted); font-size: 0.9rem; }
.hint { color: var(--muted); font-size: 0.85rem; margin: 8px 0; }

#pool {
  position: relative;
  height: 55vh;
  overflow-y: auto;
  background: var(--panel);
  border: 1px solid #000;
  border-radius: 8px;
}
#poolSpacer { width: 1px; }
#poolItems { position: absolute; top: 0; left: 0; right: 0; }

.pool-row {
  position: absolute;
  left: 0;
  right: 0;
  height: var(--row-h);
  display: flex;
  gap: 6px;
  padding: 4px 8px;
}
.pool-row .chip {
  width: var(--chip-w);
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  line-height: 30px;
}

.empty { color: var(--muted); padding: 20px; text-align: center; }

#toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  opacity: 0;
  transition: opacity .2s;
  pointer-events: none;
}
#toast.show { opacity: 1; }

@media (max-width: 600px) {
  :root { --chip-w: 104px; }
  main { padding: 10px; }
  .tier-label { flex-basis: 50px; font-size: 1.3rem; }
}