:root {
  --bg: #eef3f8; --card: #ffffff; --ink: #1b2a3a; --sub: #5a6b7c; --line: #d5dee8;
  --accent: #ffcf2e; --ok: #1f9d55; --ng: #d64545; --btn: #2b6fd6;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: "Hiragino Maru Gothic ProN", "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  font-size: 18px; line-height: 1.6;
  padding: env(safe-area-inset-top) 16px calc(24px + env(safe-area-inset-bottom));
}
.top { max-width: 960px; margin: 16px auto 8px; }
h1 { margin: 0; font-size: 34px; letter-spacing: .04em; }
h1 small { font-size: 18px; color: var(--sub); margin-left: 8px; letter-spacing: 0; }
.lead { margin: 6px 0 0; color: var(--sub); }
main { max-width: 960px; margin: 0 auto; display: grid; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 16px 20px; }
.card.small { font-size: 15px; color: var(--sub); }
h2 { margin: 0 0 8px; font-size: 22px; }
.hint { margin: 0 0 12px; color: var(--sub); font-size: 16px; }
.pickers { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .pickers { grid-template-columns: 1fr; } }
.pick {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 120px; border-radius: 16px; background: var(--btn); color: #fff; cursor: pointer;
  user-select: none; -webkit-user-select: none; touch-action: manipulation;
}
.pick:active { transform: scale(.98); filter: brightness(.95); }
.pick input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.pick .big { font-size: 28px; font-weight: 800; }
.pick .sub { font-size: 16px; opacity: .92; }
.drop {
  margin-top: 14px; border: 3px dashed var(--line); border-radius: 16px; padding: 18px;
  text-align: center; color: var(--sub); font-size: 16px;
}
.drop.over { border-color: var(--btn); color: var(--btn); background: #eaf2ff; }
.verdict { font-size: 26px; font-weight: 800; padding: 10px 14px; border-radius: 12px; margin-bottom: 10px; }
.verdict.ok { background: #e3f6ea; color: var(--ok); }
.verdict.ng { background: #fde8e8; color: var(--ng); }
.verdict .note { display: block; font-size: 17px; font-weight: 600; color: var(--ink); margin-top: 4px; }
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 4px 14px; margin: 0; font-size: 16px; }
.facts dt { color: var(--sub); }
.facts dd { margin: 0; word-break: break-all; }
.iconWrap { margin-top: 12px; }
.iconWrap img { max-width: 100%; max-height: 520px; background: #f7f9fb; border: 1px solid var(--line); border-radius: 12px; }
details { margin-top: 12px; font-size: 15px; }
summary { cursor: pointer; color: var(--btn); font-weight: 700; min-height: 44px; display: flex; align-items: center; }
.opcodes { columns: 2; font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
@media (max-width: 640px) { .opcodes { columns: 1; } }