/* style.css（グラデ控えめ・カード型・可読性重視版：背景をクイズ側に統一） */

:root{
  --bg:#f2f7ff;          /* クイズ側と統一 */
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;

  --danger:#e11d48;
  --danger-bg:rgba(225,29,72,.16);

  --ok:#16a34a;
  --ok-bg:rgba(22,163,74,.16);

  --warn:#f59e0b;
  --warn-bg:rgba(245,158,11,.16);

  --radius:16px;
  --shadow:0 10px 24px rgba(16,24,40,.08);
  --max:980px;
}

/* base */
*{
  box-sizing:border-box;
}

body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans JP",
               "Hiragino Sans","Yu Gothic",sans-serif;
  color:var(--text);
  line-height:1.7;
  font-size:15px;

  /* ★ クイズ側と同じ背景 */
  background: linear-gradient(
    180deg,
    #e0f2fe 0%,
    #f2f7ff 100%
  );
}

/* layout */
.container{
  max-width:var(--max);
  margin:0 auto;
  padding:0 16px 32px;
}

/* header */
.site-header{
  padding:24px 0 16px;
}

.badge{
  display:inline-block;
  font-size:12px;
  font-weight:800;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(37,99,235,.06);
  border:1px solid rgba(37,99,235,.30);
  color:#1d4ed8;
}

h1{
  margin:10px 0 8px;
  font-size:clamp(22px,3.2vw,32px);
  line-height:1.3;
}

.lead{
  margin:0;
  font-size:14px;
  color:var(--muted);
}

/* quick links */
.quick{
  margin-top:18px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

.quick-link{
  text-decoration:none;
  font-weight:800;
  font-size:15px;
  padding:14px 18px;
  color:var(--text);
  background:#fff;
  border:1px solid var(--border);
  border-radius:999px;
  box-shadow:0 6px 16px rgba(16,24,40,.10);
  min-height:48px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:1 1 calc(50% - 12px);
}

/* panels */
.panel{
  margin-top:18px;
  padding:16px;
  border-radius:var(--radius);
  border:1px solid rgba(229,231,235,.95);
  background:rgba(255,255,255,.9);
  box-shadow:var(--shadow);
}

.panel h2{
  margin:0 0 12px;
  font-size:18px;
}

/* panel accents */
.panel.ok{
  border-color:rgba(22,163,74,.30);
  background:linear-gradient(
    180deg,
    rgba(22,163,74,.10),
    rgba(255,255,255,.95) 70%
  );
}

.panel.warn{
  border-color:rgba(245,158,11,.32);
  background:linear-gradient(
    180deg,
    var(--warn-bg),
    rgba(255,255,255,.95) 70%
  );
}

.panel.danger{
  border-color:rgba(225,29,72,.30);
  background:linear-gradient(
    180deg,
    rgba(225,29,72,.10),
    rgba(255,255,255,.95) 70%
  );
}

/* emergency panel */
.panel.emergency{
  border-color:rgba(239,68,68,.40);
  background:linear-gradient(
    180deg,
    rgba(239,68,68,.16) 0%,
    rgba(255,255,255,.95) 70%
  );
}

/* details cards */
.item{
  margin:10px 0;
  padding:14px 14px 12px;
  border-radius:14px;
  background:#fff;
  border:1px solid var(--border);
  box-shadow:0 4px 10px rgba(15,23,42,.04);
}

.item summary{
  font-weight:700;
  cursor:pointer;
  margin:0;
  list-style:none;
  font-size:15px;
  display:flex;
  align-items:center;
  gap:4px;
}

.item p{
  margin:8px 0 0;
  font-size:14px;
}

/* danger */
.item.danger{
  border-color:rgba(225,29,72,.28);
  border-left:4px solid var(--danger);
}

.item.danger summary{
  color:#b91c1c;
}

.item.danger[open]{
  background:rgba(254,226,226,.65);
}

/* ok */
.item.ok{
  border-color:rgba(22,163,74,.26);
  border-left:4px solid var(--ok);
}

.item.ok summary{
  color:#15803d;
}

.item.ok[open]{
  background:rgba(220,252,231,.7);
}

/* warn */
.item.warn{
  border-color:rgba(245,158,11,.32);
  border-left:4px solid var(--warn);
}

.item.warn summary{
  color:#b45309;
}

.item.warn[open]{
  background:rgba(254,243,199,.8);
}

/* emergency item */
.item.emergency{
  border-color:rgba(239,68,68,.38);
  border-left:4px solid #ef4444;
}

.item.emergency summary{
  font-weight:700;
  color:#b91c1c;
}

.item.emergency[open]{
  background:rgba(254,226,226,.8);
}

/* lists */
.list{
  margin:0;
  padding-left:18px;
  font-size:14px;
}

.list li{
  margin:8px 0;
}

/* note */
.note{
  margin-top:12px;
  font-size:13px;
  color:#374151;
  background:rgba(99,102,241,.10);
  border:1px solid rgba(99,102,241,.20);
  border-radius:var(--radius);
  padding:12px;
}

/* footer */
.footer{
  text-align:center;
  font-size:12px;
  color:var(--muted);
  padding:22px 0 30px;
}

/* highlight */
.highlight{
  font-weight:800;
  color:#b91c1c;
  background:rgba(254,226,226,.7);
  padding:0 3px;
  border-radius:4px;
}

/* labels */
.label{
  display:inline-block;
  font-size:.75rem;
  font-weight:700;
  padding:2px 8px;
  margin-right:6px;
  border-radius:999px;
  background:#e5e7eb;
  color:#374151;
}

.label-action{ background:#dcfce7; color:#15803d; }
.label-point{ background:#fef9c3; color:#92400e; }
.label-caution{ background:#fee2e2; color:#b91c1c; }

/* badges */
.badge-ng,
.badge-ok,
.badge-warn{
  display:inline-block;
  font-size:.7rem;
  font-weight:700;
  padding:2px 6px;
  margin-right:6px;
  border-radius:999px;
  vertical-align:middle;
}

.badge-ng{ background:#fee2e2; color:#b91c1c; }
.badge-ok{ background:#dcfce7; color:#166534; }
.badge-warn{ background:#fef3c7; color:#92400e; }

/* images */
.img-wrap{
  margin:8px 0;
  text-align:center;
}

.img-wrap img{
  width:150px;
  max-width:70%;
  height:auto;
  border-radius:8px;
}

/* responsive */
@media (max-width:640px){
  .quick{ flex-direction:column; }
  .quick-link{
    width:100%;
    flex:none;
    font-size:15px;
    padding:14px 20px;
  }
  .panel{ padding:14px; }
  .item{ padding:14px; }
  h1{ font-size:24px; }
}

@media (max-width:480px){
  body{ font-size:14.5px; }
  .lead{ font-size:13px; }
  .item summary{ font-size:14.5px; }
}
.back-home-wrap{
  margin: 28px 0 12px;
  display: flex;
  justify-content: center;
}

.back-home-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  max-width: 320px;
  padding: 14px 18px;
  border-radius: 18px;
  background: linear-gradient(135deg, #6c63ff, #4f8df7);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(108, 99, 255, 0.28);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.back-home-btn:hover{
  box-shadow: 0 12px 24px rgba(108, 99, 255, 0.34);
}

.back-home-btn:active{
  transform: scale(0.97);
}