:root {
  --red: #d7263d;
  --red-dark: #a51d2f;
  --on-red: #ffffff;
  --ink: #1d1d1f;
  --sub: #5f6368;
  --line: #e3e3e6;
  --field: #c9c9cc;
  --bg: #f7f7f8;
  --card: #ffffff;
  --ok: #1e8e3e;
  --ng: #c5221f;
  --sel-bg: #fff1f3;
  --ok-bg: #e6f4ea;
  --ng-bg: #fce8e6;
  --note-bg: #fff4cc;
  --shade: rgba(0, 0, 0, .5);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --red: #ff5a6e; --red-dark: #e0435a; --on-red: #1a0b0e; --ink: #f1f1f3; --sub: #a9abb0; --line: #34353a;
    --field: #4a4b52; --bg: #151518; --card: #1f2024; --ok: #5bd17f; --ng: #ff7b72;
    --sel-bg: #3a1a20; --ok-bg: #143322; --ng-bg: #3a1a18; --note-bg: #3a3214; --shade: rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --red: #ff5a6e; --red-dark: #e0435a; --on-red: #1a0b0e; --ink: #f1f1f3; --sub: #a9abb0; --line: #34353a;
  --field: #4a4b52; --bg: #151518; --card: #1f2024; --ok: #5bd17f; --ng: #ff7b72;
  --sel-bg: #3a1a20; --ok-bg: #143322; --ng-bg: #3a1a18; --note-bg: #3a3214; --shade: rgba(0, 0, 0, .7);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

.bar {
  position: sticky;
  top: env(safe-area-inset-top, 0px);
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; letter-spacing: .08em; color: var(--red); font-size: 14px; }
.progress { flex: 1; height: 6px; background: var(--line); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; width: 0; background: var(--red); transition: width .3s; }

main { max-width: 560px; margin: 0 auto; padding-block: 20px 48px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); }
.demo { font-size: 13px; background: var(--note-bg); color: var(--ink); border-radius: 10px; padding: 8px 12px; margin-bottom: 14px; }

h1 { font-size: 26px; line-height: 1.35; margin: 12px 0 8px; }
h2 { font-size: 20px; line-height: 1.45; margin: 4px 0 16px; }
.lead { color: var(--sub); margin: 0 0 20px; }
.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--red);
  border: 1px solid var(--red);
  border-radius: 999px;
  padding: 1px 10px;
  margin-bottom: 8px;
}
.count { color: var(--sub); font-size: 13px; margin-left: 8px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin-bottom: 16px; }

.btn {
  display: block;
  width: 100%;
  min-height: 52px;
  padding: 12px 16px;
  margin: 10px 0;
  border: 0;
  border-radius: 12px;
  background: var(--red);
  color: var(--on-red);
  font-size: 17px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
}
.btn:active { background: var(--red-dark); }
.btn:disabled { background: var(--field); cursor: default; }
.btn.ghost { background: transparent; color: var(--sub); border: 1px solid var(--line); font-weight: 400; }
.btn.okbtn { background: var(--ok); color: var(--on-red); }

.choice {
  display: block;
  width: 100%;
  text-align: left;
  min-height: 52px;
  padding: 12px 16px;
  margin: 8px 0;
  border: 2px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
  font-size: 16px;
  font-family: inherit;
  cursor: pointer;
}
.choice.selected { border-color: var(--red); background: var(--sel-bg); }
.choice.correct { border-color: var(--ok); background: var(--ok-bg); }
.choice.wrong { border-color: var(--ng); background: var(--ng-bg); }
.choice:disabled { cursor: default; }

.feedback { border-radius: 12px; padding: 14px 16px; margin: 14px 0; background: var(--card); border-left: 5px solid var(--ok); }
.feedback.ng { border-left-color: var(--ng); }
.feedback strong { display: block; font-size: 17px; margin-bottom: 4px; }

.q { margin-bottom: 22px; }
.q-title { font-weight: 700; margin-bottom: 4px; }

label.field { display: block; font-weight: 700; margin: 14px 0 6px; }
label.field small { font-weight: 400; color: var(--sub); }
textarea { resize: vertical; line-height: 1.5; }
input[type=text], input[type=email], input[type=tel], input[type=password], textarea {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid var(--field);
  background: var(--card);
  color: var(--ink);
  border-radius: 10px;
  font-size: 16px;
  font-family: inherit;
}
.consent { display: flex; gap: 10px; align-items: flex-start; margin: 16px 0 4px; font-size: 14px; }
.consent input { width: 22px; height: 22px; flex: none; margin-top: 1px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.note { font-size: 12px; color: var(--sub); margin-top: 16px; }
.error { color: var(--ng); font-size: 14px; margin: 8px 0 0; }

.score { text-align: center; padding: 26px 16px; }
.score-num { font-size: 64px; font-weight: 800; color: var(--red); line-height: 1.1; }
.score-num small { font-size: 22px; color: var(--sub); font-weight: 400; }
.rank { font-size: 22px; font-weight: 700; margin-top: 6px; }
.gift { display: inline-block; margin-top: 12px; padding: 6px 18px; border-radius: 999px; background: var(--ink); color: var(--bg); font-weight: 700; }
.breakdown { display: flex; justify-content: center; gap: 18px; color: var(--sub); font-size: 14px; margin-top: 10px; }
.show-staff { text-align: center; font-weight: 700; background: var(--note-bg); border-radius: 10px; padding: 10px; }
.done-stamp { text-align: center; font-size: 22px; font-weight: 800; color: var(--ok); border: 3px solid var(--ok); border-radius: 12px; padding: 10px; margin: 12px 0; }

.modal { position: fixed; inset: 0; background: var(--shade); display: flex; align-items: center; justify-content: center; padding: 16px; z-index: 10; }
.modal[hidden] { display: none; }
.modal-box { background: var(--card); border-radius: 16px; padding: 20px; width: 100%; max-width: 400px; }
.modal-title { font-weight: 700; font-size: 18px; margin: 0 0 12px; }

@media print { .bar, .modal { display: none; } }