:root {
  --accent: #e8590c;
  --accent-dark: #c94f0e;
  --bg: #faf9f7;
  --card-bg: #ffffff;
  --text: #2b2b2b;
  --muted: #6b6b6b;
  --border: #e5e0da;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: linear-gradient(135deg, #2b2b2b, #4a4a4a);
  color: #fff;
  padding: 48px 0 36px;
  text-align: center;
}

.site-header h1 {
  font-size: 1.6rem;
  margin: 0 0 12px;
}

.site-header .lead {
  color: #d8d8d8;
  font-size: 0.95rem;
  max-width: 560px;
  margin: 0 auto;
}

.notice {
  background: #fff7ed;
  border: 1px solid #f3d9b1;
  border-radius: 10px;
  padding: 18px 20px;
  margin: 28px 0;
  font-size: 0.88rem;
  color: #6b5030;
}

.notice h2 {
  font-size: 0.95rem;
  margin: 0 0 8px;
}

.toc {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 22px;
  margin: 24px 0;
}

.toc h2 {
  font-size: 0.95rem;
  margin: 0 0 10px;
}

.toc ul {
  margin: 0;
  padding-left: 1.2em;
  font-size: 0.88rem;
}

.toc a {
  color: var(--accent-dark);
  text-decoration: none;
}

.toc a:hover {
  text-decoration: underline;
}

.usecases {
  margin: 32px 0;
}

.usecases h2 {
  font-size: 1.2rem;
  margin: 0 0 16px;
}

.usecase-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 22px;
  margin-bottom: 14px;
}

.usecase-block h3 {
  font-size: 0.98rem;
  margin: 0 0 8px;
}

.usecase-block p {
  font-size: 0.9rem;
  margin: 0;
  color: var(--text);
}

.faq {
  margin: 40px 0;
}

.faq h2 {
  font-size: 1.2rem;
  margin: 0 0 16px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 22px;
  margin-bottom: 12px;
}

.faq-item h3 {
  font-size: 0.92rem;
  margin: 0 0 8px;
}

.faq-item p {
  font-size: 0.88rem;
  color: var(--muted);
  margin: 0;
}

.ranking {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin: 32px 0;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  position: relative;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.rank-badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  font-weight: bold;
  font-size: 0.85rem;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.product-img {
  display: block;
  max-width: 220px;
  width: 100%;
  height: auto;
  margin: 0 auto 16px;
  border-radius: 10px;
  background: #f2f0ec;
}

.card h3 {
  font-size: 1.1rem;
  margin: 0 0 8px;
}

.price {
  color: var(--accent-dark);
  font-weight: bold;
  margin: 0 0 12px;
}

.points {
  margin: 0 0 12px;
  padding-left: 1.2em;
}

.points li {
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.use-case {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 16px;
}

.cta {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  padding: 12px 28px;
  border-radius: 8px;
  transition: background 0.15s ease;
}

.cta:hover {
  background: var(--accent-dark);
}

.related {
  margin: 40px 0;
}

.related h2 {
  font-size: 1.1rem;
  margin: 0 0 10px;
}

.related-lead {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 18px;
}

.card--related {
  border-color: #cfe0d8;
  background: #f5faf7;
}

@media (prefers-color-scheme: dark) {
  .card--related {
    background: #1e2620;
    border-color: #33423a;
  }
}

.howto {
  margin: 40px 0;
  padding: 24px;
  background: #fff;
  border-radius: 14px;
  border: 1px solid var(--border);
}

.howto h2 {
  font-size: 1.1rem;
  margin: 0 0 14px;
}

.howto ul {
  padding-left: 1.2em;
  margin: 0;
}

.howto li {
  margin-bottom: 10px;
  font-size: 0.92rem;
}

.site-footer {
  margin-top: 40px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--border);
}

.disclosure {
  font-size: 0.78rem;
  color: var(--muted);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1b19;
    --card-bg: #26241f;
    --text: #ece8e1;
    --muted: #a8a29a;
    --border: #3a372f;
  }
  .notice {
    background: #2e2410;
    border-color: #4a3a1a;
    color: #e6c98a;
  }
}