:root {
  --bg: #0d1016;
  --panel: #171d28;
  --panel2: #212936;
  --line: #2e3849;
  --text: #e7edf7;
  --muted: #94a2b8;
  --accent: #f6c445;
  --green: #7be06a;
  --red: #ff5c5c;
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif; }
body { padding: 10px; }
.app { display: flex; gap: 10px; max-width: 1000px; margin: 0 auto; align-items: flex-start; }
.stage { position: relative; flex: 1 1 auto; min-width: 0; }
canvas#board { display: block; width: 100%; max-width: 576px; aspect-ratio: 576 / 468; background: #12161f; border: 1px solid var(--line); border-radius: 6px; touch-action: none; cursor: crosshair; }

.panel { width: 290px; flex: 0 0 290px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 10px; display: flex; flex-direction: column; gap: 10px; }
.panel header { display: flex; flex-direction: column; gap: 5px; }
.brand { font-weight: 800; letter-spacing: .12em; color: var(--accent); font-size: 15px; }
.stats { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 13px; color: var(--muted); }
.stats b { color: #fff; font-size: 15px; }
.panel section { display: flex; flex-direction: column; gap: 5px; }

button { font: inherit; color: var(--text); background: var(--panel2); border: 1px solid var(--line); border-radius: 6px; padding: 7px 9px; cursor: pointer; transition: background .1s; }
button:hover:not(:disabled) { background: #2b3444; }
button:disabled { opacity: .45; cursor: default; }
button.send { background: #2f6b3d; border-color: #3d8b4f; font-weight: 700; font-size: 14px; }
button.send:hover:not(:disabled) { background: #3a8049; }
button.send b { color: var(--accent); }
.next { font-size: 12px; color: var(--muted); min-height: 16px; }

.panel .shop { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.panel .info { display: block; }
.card { position: relative; touch-action: none; user-select: none; display: flex; flex-direction: column; align-items: center; gap: 1px; padding: 5px 2px 4px; line-height: 1.2; }
.card .ic { width: 40px; height: 40px; }
.card .nm { font-size: 11px; font-weight: 600; }
.card .cost { font-size: 11px; color: var(--accent); }
.card .kb { position: absolute; top: 2px; left: 4px; font-size: 9px; color: var(--muted); }
.card.on { outline: 2px solid var(--accent); background: #2b3444; }
.card.poor .cost { color: var(--red); }
.card.airable { outline: 1px dashed #b58cff; }
.card.on.airable { outline: 2px solid var(--accent); }

.info { background: #10141c; border: 1px solid var(--line); border-radius: 6px; padding: 8px; min-height: 92px; font-size: 12px; }
.info .hint { color: var(--muted); line-height: 1.6; }
.info .hint b { color: var(--text); }
.info .ttl { font-weight: 700; font-size: 14px; }
.info .lv { color: var(--accent); margin-left: 4px; }
.info .kx { color: var(--muted); font-size: 11px; font-weight: 400; margin-left: 4px; }
.info .rows { display: flex; flex-wrap: wrap; gap: 2px 10px; margin: 5px 0 7px; color: var(--muted); }
.info .uprow { background: #161d2a; border: 1px solid var(--line); border-radius: 5px; padding: 4px 6px; margin: 0 0 6px; font-size: 11px; color: var(--muted); }
.info .uprow s { opacity: .6; }
.info .uprow em { color: var(--accent); font-style: normal; font-weight: 700; }
.info .uprow.max { color: var(--accent); text-align: center; }
.next .warn { color: #d8a7ff; }
.info .acts { display: flex; gap: 4px; flex-wrap: wrap; }
.info .acts button { flex: 1 1 auto; font-size: 12px; padding: 6px 4px; }
.info .acts .sell { background: #3a2730; }

.controls .row { display: flex; gap: 4px; }
.controls .row button { flex: 1; font-size: 12px; }
.controls .row button.on { background: var(--accent); color: #1b1200; font-weight: 700; }

.dragghost { position: fixed; left: 0; top: 0; width: 48px; height: 48px; pointer-events: none; z-index: 100; opacity: .92; filter: drop-shadow(0 4px 8px rgba(0,0,0,.6)); }
body.dragging { cursor: grabbing; }
body.dragging canvas#board { cursor: grabbing; }

.toast { position: absolute; left: 50%; top: 10px; transform: translate(-50%, -8px); background: rgba(0,0,0,.82); color: #fff; padding: 5px 14px; border-radius: 99px; font-size: 12px; opacity: 0; pointer-events: none; transition: opacity .12s, transform .12s; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

.overlay { position: absolute; inset: 0; max-width: 576px; display: flex; align-items: center; justify-content: center; background: rgba(8,10,16,.82); border-radius: 6px; }
.hidden { display: none !important; }
.box { padding: 18px 20px; width: min(94%, 460px); text-align: center; }
.box h1 { margin: 0 0 10px; color: var(--accent); font-size: 26px; letter-spacing: .1em; }
.box .lead { color: var(--muted); line-height: 1.7; font-size: 13px; margin: 0 0 14px; }
.box .lead b { color: var(--text); }
.box .tiny { color: var(--muted); font-size: 11px; margin: 10px 0 0; }
button.big { font-size: 15px; font-weight: 700; padding: 9px 24px; background: var(--accent); color: #1b1200; border-color: #c9a02f; margin: 3px; }
button.big.alt { background: var(--panel2); color: var(--text); border-color: var(--line); }
.diffs { display: flex; flex-direction: column; gap: 5px; margin-bottom: 12px; }
.diffcard { display: flex; flex-direction: column; gap: 1px; text-align: left; }
.diffcard .dn { font-weight: 700; font-size: 13px; }
.diffcard .dd, .diffcard .db { font-size: 11px; color: var(--muted); }
.diffcard.on { outline: 2px solid var(--accent); background: #2b3444; }

@media (max-width: 900px) {
  .app { flex-direction: column; align-items: stretch; }
  .panel { width: 100%; flex: none; }
  .stage { display: flex; justify-content: center; }
  canvas#board { margin: 0 auto; }
  .overlay { left: 50%; transform: translateX(-50%); width: 100%; }
}
@media (max-width: 480px) {
  body { padding: 6px; }
  .panel .shop { grid-template-columns: repeat(5, 1fr); }
  .card .nm { display: none; }
  .card .ic { width: 34px; height: 34px; }
}