/* =========================================================
   Base / Reset
   ========================================================= */
:root {
  --color-bg: #0c0e14;
  --color-bg-elevated: #14171f;
  --color-bg-card: #191c26;
  --color-border: #2a2e3a;
  --color-text: #e6e8ee;
  --color-text-muted: #9aa0b0;
  --color-accent: #ff6a3d;
  --color-accent-hover: #ff8a63;
  --max-width: 960px;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic",
    "Meiryo", system-ui, -apple-system, sans-serif;
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* =========================================================
   Layout
   ========================================================= */
.site-header {
  background: var(--color-bg-elevated);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 20px;
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.site-header__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.site-header__name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
}

.site-header__name:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.site-header__tagline {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.site-nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 0.85rem;
}

.site-nav a {
  color: var(--color-text-muted);
}

.site-nav a:hover {
  color: var(--color-accent);
}

.site-main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
}

.site-footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: 24px 20px 32px;
  margin-top: 48px;
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.site-footer__notice {
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 8px;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 12px 0;
}

.site-footer__copyright {
  margin-top: 16px;
  color: var(--color-text-muted);
}

/* =========================================================
   Top page
   ========================================================= */
.hero {
  background: linear-gradient(135deg, #1a1d2b 0%, #0c0e14 100%);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 32px 24px;
  margin-bottom: 32px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 1.6rem;
  line-height: 1.5;
}

.hero p {
  color: var(--color-text-muted);
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card__title {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0;
}

.card__title a {
  color: var(--color-text);
}

.card__title a:hover {
  color: var(--color-accent);
}

.card__desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  flex-grow: 1;
}

.card__link {
  font-size: 0.85rem;
  font-weight: 700;
}

/* =========================================================
   Article
   ========================================================= */
.article h1 {
  font-size: 1.5rem;
  line-height: 1.5;
  margin-bottom: 8px;
}

.article__meta {
  color: var(--color-text-muted);
  font-size: 0.82rem;
  margin-bottom: 24px;
}

.article h2 {
  font-size: 1.25rem;
  margin-top: 36px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-accent);
}

.article h3 {
  font-size: 1.05rem;
  margin-top: 24px;
  color: var(--color-text);
}

.article p {
  margin: 12px 0;
}

.article ul,
.article ol {
  padding-left: 1.4em;
}

.article li {
  margin: 6px 0;
}

.note {
  background: var(--color-bg-card);
  border-left: 3px solid var(--color-accent);
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin: 16px 0;
}

/* 比較表: スマホでは横スクロールコンテナに収める */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

table {
  border-collapse: collapse;
  width: 100%;
  min-width: 560px;
  font-size: 0.88rem;
}

thead th {
  background: var(--color-bg-elevated);
  color: var(--color-text);
  text-align: left;
  padding: 10px 12px;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-border);
}

tbody td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: none;
}

/* FAQ */
.faq {
  margin-top: 16px;
}

.faq__item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq__q {
  font-weight: 700;
  margin: 0 0 8px;
}

.faq__q::before {
  content: "Q. ";
  color: var(--color-accent);
}

.faq__a {
  margin: 0;
  color: var(--color-text-muted);
}

.faq__a::before {
  content: "A. ";
  color: var(--color-text);
  font-weight: 700;
}

/* CTA */
.cta {
  display: inline-block;
  background: var(--color-accent);
  color: #12131a;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 999px;
  margin: 12px 0;
}

.cta:hover {
  background: var(--color-accent-hover);
  color: #12131a;
  text-decoration: none;
}

.cta-block {
  text-align: center;
  padding: 16px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  margin: 24px 0;
}

.cta-block p {
  margin: 0 0 10px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* =========================================================
   18禁ゲート
   ========================================================= */
#age-gate {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(4, 5, 8, 0.97);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.age-gate__box {
  max-width: 420px;
  width: 100%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
}

.age-gate__box h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.age-gate__box p {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin: 0 0 20px;
}

.age-gate__buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.age-gate__buttons button {
  font-size: 0.95rem;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  cursor: pointer;
}

#age-gate-enter {
  background: var(--color-accent);
  color: #12131a;
  border-color: var(--color-accent);
}

#age-gate-enter:hover {
  background: var(--color-accent-hover);
}

#age-gate-leave {
  background: transparent;
  color: var(--color-text-muted);
}

#age-gate-leave:hover {
  color: var(--color-text);
}

/* =========================================================
   Legal pages
   ========================================================= */
.legal h1 {
  font-size: 1.4rem;
}

.legal h2 {
  font-size: 1.1rem;
  margin-top: 28px;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

  .hero {
    padding: 24px 18px;
  }

  .site-main {
    padding: 20px 16px 40px;
  }
}