:root {
  --bg: #faf7f2;
  --ink: #26221c;
  --muted: #8a8177;
  --accent: #c96f4a;
  --panel: #ffffff;
  --line: #e8e1d6;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
}
header { padding: 28px 20px 8px; text-align: center; }
h1 { margin: 0; font-size: 28px; letter-spacing: -0.02em; }
.sub { color: var(--muted); margin: 6px 0 0; }
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  max-width: 720px; margin: 18px auto; padding: 18px;
}
.hidden { display: none !important; }
.row { display: flex; gap: 10px; align-items: center; }
.row.wrap { flex-wrap: wrap; margin-top: 12px; }
.center-items { justify-content: center; margin: 10px 0 24px; }
input[type=url] {
  flex: 1; padding: 12px 14px; font-size: 15px; border: 1px solid var(--line);
  border-radius: 10px; background: var(--bg); color: var(--ink);
}
button {
  padding: 12px 18px; font-size: 15px; border: 1px solid var(--line);
  border-radius: 10px; background: var(--panel); color: var(--ink); cursor: pointer;
}
button.primary, #load-board { background: var(--accent); border-color: var(--accent); color: #fff; }
button:active { transform: translateY(1px); }
.hint { color: var(--muted); font-size: 13px; }
.hint.center { text-align: center; }
.hint-inline { color: var(--muted); font-size: 12px; }
.upload { display: block; text-align: center; padding: 12px; border: 1px dashed var(--line); border-radius: 10px; color: var(--accent); cursor: pointer; margin-top: 8px; }
.check { font-size: 14px; }
#pin-strip { display: grid; grid-template-columns: repeat(auto-fill, minmax(88px, 1fr)); gap: 8px; margin: 12px 0; }
#pin-strip .pin { position: relative; border-radius: 8px; overflow: hidden; border: 2px solid transparent; cursor: pointer; aspect-ratio: 1; background: var(--bg); }
#pin-strip .pin img { width: 100%; height: 100%; object-fit: cover; display: block; }
#pin-strip .pin.off { opacity: 0.3; }
#pin-strip .pin.on { border-color: var(--accent); }
.status { color: var(--muted); font-size: 13px; }
.toolbar { display: flex; gap: 10px; align-items: center; justify-content: center; padding: 10px; }
#canvas-wrap { display: flex; justify-content: center; padding: 0 10px; }
#canvas {
  position: relative; width: min(94vw, 900px); aspect-ratio: 4/3;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; touch-action: none;
  box-shadow: 0 8px 30px rgba(38,34,28,0.08);
}
#canvas .item { position: absolute; cursor: grab; user-select: none; -webkit-user-drag: none; }
#canvas .item.selected { outline: 2px solid var(--accent); outline-offset: 2px; }
#canvas .item img { width: 100%; height: auto; display: block; pointer-events: none; }

button:focus-visible, input:focus-visible, .pin:focus-visible, .upload:focus-within {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
@media (max-width: 560px) {
  header { padding: 20px 14px 4px; }
  h1 { font-size: 23px; }
  .panel { margin: 12px 10px; padding: 14px; }
  .row { flex-direction: column; align-items: stretch; }
  .row.center-items { flex-direction: row; align-items: center; }
  #pin-strip { grid-template-columns: repeat(auto-fill, minmax(72px, 1fr)); }
  .toolbar { flex-wrap: wrap; }
}