:root {
  --c-bg: #f5f6f8;
  --c-card: #fff;
  --c-border: #dfe3e8;
  --c-text: #222;
  --c-muted: #6b7280;
  --c-primary: #2563eb;
  --c-primary-dark: #1d4ed8;
  --c-accent: #f59e0b;
  --c-a: #059669;
  --c-b: #2563eb;
  --c-c: #f59e0b;
  --c-d: #dc2626;
  --c-score-3: #059669;
  --c-score-2: #2563eb;
  --c-score-1: #f59e0b;
  --c-score-0: #dc2626;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Sans",
               "Yu Gothic UI", "Noto Sans JP", sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
}

.screen { display: none; }
.screen.active { display: block; }

/* ============= 共通カード ============= */
.card {
  max-width: 720px;
  margin: 40px auto;
  padding: 32px;
  background: var(--c-card);
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.card h1 {
  margin: 0 0 16px;
  font-size: 1.6rem;
  text-align: center;
}
.card h1 .vi { font-size: 1.1rem; color: var(--c-muted); font-weight: 500; }
.card.center { text-align: center; }

.lead { text-align: center; color: #333; }
.notice {
  background: #fff8e1;
  border-left: 4px solid var(--c-accent);
  padding: 12px 16px;
  border-radius: 4px;
  list-style: none;
  margin: 16px 0 24px;
}
.notice li { margin: 4px 0; font-size: 0.95rem; }

.vi { color: #4b5563; font-size: 0.9em; }
.muted { color: var(--c-muted); font-size: 0.9em; }

/* 色付き背景の中ではviを半透明白に（可読性確保） */
button.primary .vi,
.grade-box .vi,
.choice-id .vi { color: rgba(255,255,255,0.85); }

/* ============= フォーム ============= */
form label {
  display: block;
  margin: 14px 0;
  font-weight: 600;
  font-size: 0.95rem;
}
form input, form select, form textarea {
  display: block;
  width: 100%;
  padding: 10px 12px;
  margin-top: 6px;
  font-size: 1rem;
  font-weight: normal;
  border: 1px solid var(--c-border);
  border-radius: 6px;
  background: #fff;
}
form input:focus, form select:focus { outline: 2px solid var(--c-primary); border-color: var(--c-primary); }

button {
  cursor: pointer;
  font-size: 1rem;
  padding: 10px 20px;
  border-radius: 6px;
  border: 1px solid var(--c-border);
  background: #fff;
  font-family: inherit;
}
button.primary {
  background: var(--c-primary);
  color: #fff;
  border-color: var(--c-primary);
  padding: 12px 28px;
  font-weight: 600;
}
button.primary:hover { background: var(--c-primary-dark); }
button.primary:disabled { background: #9ca3af; border-color: #9ca3af; cursor: not-allowed; }
button.secondary { background: #f3f4f6; }
button.link { background: none; border: none; color: var(--c-primary); text-decoration: underline; padding: 2px 6px; }

/* ============= テスト画面 ============= */
.test-header {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--c-border);
  padding: 12px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
}
.candidate-label { font-weight: 600; color: var(--c-muted); }
.timer {
  font-size: 1.8rem;
  font-weight: bold;
  font-variant-numeric: tabular-nums;
  color: var(--c-primary);
}
.timer.urgent { color: var(--c-d); animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0.4; } }

#questions-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px;
}
.question {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.question h2 {
  font-size: 1.1rem;
  margin: 0 0 4px;
  line-height: 1.5;
}
.qnum { color: var(--c-primary); margin-right: 4px; }
.question .vi { margin: 0 0 16px; }

.choices { display: flex; flex-direction: column; gap: 8px; }
.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 2px solid var(--c-border);
  border-radius: 8px;
  padding: 14px 16px;
  cursor: pointer;
  transition: all 0.15s;
}
.choice:hover { border-color: var(--c-primary); background: #f0f7ff; }
.choice input { margin: 4px 0 0; flex-shrink: 0; }
.choice input:checked ~ .choice-body { color: var(--c-primary); font-weight: 600; }
.choice:has(input:checked) { border-color: var(--c-primary); background: #eff6ff; }
.choice-body {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  flex: 1;
  min-width: 0;
}
.choice-id {
  display: inline-block;
  flex-shrink: 0;
  min-width: 28px;
  height: 28px;
  line-height: 28px;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff;
  text-align: center;
  font-weight: bold;
  font-size: 0.9rem;
}
.choice-text { display: flex; flex-direction: column; flex: 1; min-width: 0; }

.test-footer {
  position: sticky;
  bottom: 0;
  background: #fff;
  border-top: 1px solid var(--c-border);
  padding: 16px 24px;
  text-align: center;
}
.progress { color: var(--c-muted); margin: 8px 0 0; }

/* ============= 管理画面 ============= */
body.admin { background: #eef0f3; }
.admin-header {
  background: #1f2937;
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.admin-header h1 { margin: 0; font-size: 1.2rem; }
.admin-header nav { display: flex; gap: 4px; }
.admin-header .tab-btn {
  background: transparent;
  color: #d1d5db;
  border: 1px solid transparent;
  padding: 6px 14px;
}
.admin-header .tab-btn.active { background: #374151; color: #fff; border-color: #4b5563; }
.admin-tools { margin-left: auto; display: flex; gap: 8px; }
.admin-tools input[type="search"] {
  padding: 6px 10px;
  border-radius: 6px;
  border: 1px solid #4b5563;
  background: #374151;
  color: #fff;
  width: 200px;
}

.tab { display: none; padding: 24px; }
.tab.active { display: block; }

.summary-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.summary {
  background: #fff;
  padding: 14px;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}
.summary span { font-size: 0.85rem; color: var(--c-muted); }
.summary strong { font-size: 1.8rem; color: var(--c-text); }

.results {
  width: 100%;
  background: #fff;
  border-collapse: collapse;
  font-size: 0.9rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.results th, .results td {
  padding: 8px 10px;
  border-bottom: 1px solid #eef0f3;
  text-align: left;
  white-space: nowrap;
}
.results th { background: #f9fafb; font-weight: 600; }
.results tbody tr:hover { background: #f3f4f6; }
.results .score { font-weight: bold; text-align: center; }
.results .grade { font-weight: bold; text-align: center; }
.grade-A { color: var(--c-a); }
.grade-B { color: var(--c-b); }
.grade-C { color: var(--c-c); }
.grade-D { color: var(--c-d); }
.results .empty { text-align: center; color: var(--c-muted); padding: 40px; }

/* 集計タブ */
.stats-q {
  background: #fff;
  padding: 18px 22px;
  border-radius: 8px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.stats-q h3 { margin: 0 0 14px; font-size: 1rem; }
.bar-row {
  display: grid;
  grid-template-columns: 1fr 200px 100px;
  align-items: center;
  gap: 12px;
  margin: 8px 0;
}
.bar-label { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; }
.bar-id {
  display: inline-block;
  min-width: 24px;
  height: 24px;
  line-height: 24px;
  border-radius: 50%;
  background: #e5e7eb;
  text-align: center;
  font-weight: bold;
  font-size: 0.8rem;
}
.bar-score {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: bold;
  color: #fff;
  margin-left: auto;
}
.score-3 { background: var(--c-score-3); }
.score-2 { background: var(--c-score-2); }
.score-1 { background: var(--c-score-1); }
.score-0 { background: var(--c-score-0); }
.bar-track {
  height: 14px;
  background: #f3f4f6;
  border-radius: 7px;
  overflow: hidden;
}
.bar-fill { display: block; height: 100%; background: var(--c-primary); }
.bar-count { font-size: 0.85rem; color: var(--c-muted); }

/* 個別詳細（レポート） */
.report {
  background: #fff;
  max-width: 900px;
  margin: 16px auto;
  padding: 32px;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}
.report-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 20px;
  border-bottom: 2px solid var(--c-border);
  margin-bottom: 24px;
  gap: 24px;
}
.report-head h2 { margin: 0 0 8px; }
.report-head .meta { margin: 4px 0; color: var(--c-muted); font-size: 0.9rem; }
.grade-box {
  text-align: center;
  padding: 16px 24px;
  border-radius: 10px;
  min-width: 140px;
  color: #fff;
}
.grade-box.grade-A { background: var(--c-a); }
.grade-box.grade-B { background: var(--c-b); }
.grade-box.grade-C { background: var(--c-c); }
.grade-box.grade-D { background: var(--c-d); }
.grade-letter { font-size: 2.5rem; font-weight: bold; line-height: 1; }
.grade-score { font-size: 1rem; margin: 4px 0; }
.grade-label { font-size: 0.85rem; }
.overall {
  background: #fef3c7;
  padding: 12px 16px;
  border-radius: 6px;
  border-left: 4px solid var(--c-accent);
  margin-bottom: 24px;
}

.detail-q {
  padding: 16px 0;
  border-bottom: 1px solid #eef0f3;
}
.detail-q h3 { margin: 0 0 4px; font-size: 1.05rem; }
.detail-q .vi { margin: 0 0 12px; }
.chosen {
  background: #f9fafb;
  padding: 14px 18px;
  border-radius: 8px;
  border-left: 5px solid var(--c-border);
}
.chosen.score-3 { border-left-color: var(--c-score-3); background: #ecfdf5; }
.chosen.score-2 { border-left-color: var(--c-score-2); background: #eff6ff; }
.chosen.score-1 { border-left-color: var(--c-score-1); background: #fffbeb; }
.chosen.score-0 { border-left-color: var(--c-score-0); background: #fef2f2; }
.chosen-head { display: flex; align-items: center; gap: 12px; font-size: 0.9rem; color: var(--c-muted); }
.score-pill {
  display: inline-block;
  background: #fff;
  padding: 2px 10px;
  border-radius: 10px;
  font-weight: bold;
  font-size: 0.8rem;
}
.chosen-text { font-weight: 600; margin: 6px 0 2px; }
.chosen-vi { color: var(--c-muted); font-size: 0.85rem; margin-bottom: 10px; }
.analysis { font-size: 0.92rem; line-height: 1.6; padding-top: 10px; border-top: 1px dashed rgba(0,0,0,0.1); }

#back-to-list, #print-btn { margin: 0 8px 16px 0; }

/* 印刷 */
@media print {
  .admin-header, #back-to-list, #print-btn { display: none !important; }
  body.admin { background: #fff; }
  .report { box-shadow: none; margin: 0; padding: 0; }
  .detail-q { page-break-inside: avoid; }
}

/* レスポンシブ */
@media (max-width: 720px) {
  .card { margin: 16px; padding: 20px; }
  .admin-header { flex-direction: column; align-items: stretch; }
  .admin-tools { margin-left: 0; }
  .results { font-size: 0.8rem; }
  .bar-row { grid-template-columns: 1fr; }
  .report-head { flex-direction: column; }
}