:root {
  --blue: #1871bd;
  --ink: #091f2f;
  --line: #e2e8f0;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, sans-serif; color: #1b2733; }
.topbar { background: var(--ink); color: #fff; padding: 12px 18px; }
main { max-width: 760px; margin: 18px auto; padding: 0 16px; }
.row { display: flex; align-items: center; gap: 10px; }
.row h2, .row h3 { margin: 12px 0; }
button { background: var(--blue); color: #fff; border: 0; border-radius: 7px; padding: 7px 12px; cursor: pointer; }
ul, ol { padding-left: 18px; }
li { margin: 6px 0; }
input { border: 1px solid var(--line); border-radius: 7px; padding: 8px 10px; min-width: 220px; }
.status { color: #16a34a; font-weight: 600; }
.hint { color: #5b6878; font-size: 13px; }
.stage { position: relative; display: inline-block; margin: 8px 0; max-width: 100%; }
.stage img { display: block; max-width: 480px; border: 1px solid var(--line); border-radius: 6px; }
#hotspot-overlay { position: absolute; inset: 0; pointer-events: none; }
.hotspot { position: absolute; border: 2px solid var(--blue); background: rgba(24,113,189,.18); border-radius: 4px; }
.hotspot.correct { border-color: #16a34a; background: rgba(22,163,74,.18); }
#hotspot-list li { display: flex; align-items: center; gap: 8px; }