/* 焚き火マスター — 公開ページ共通スタイル */

:root {
  --bg: #0a0d18;
  --bg-soft: #0d111d;
  --surface: #12161f;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --text: #f0f0f4;
  --text-2: #9a9aa6;
  --text-3: #6d6d79;
  --accent: #ff7a2e;
  --accent-2: #ffb840;
  --measure: 720px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic",
    sans-serif;
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-2);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 184, 64, 0.3);
  transition: border-color 0.15s ease, color 0.15s ease;
}

a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ---------- ヘッダー ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: inherit;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  border: none;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.brand:hover {
  color: var(--text);
}

.brand__mark {
  width: 22px;
  height: 22px;
  flex: none;
}

.brand__flame {
  transform-origin: 50% 90%;
  animation: flicker 3.2s ease-in-out infinite;
}

@keyframes flicker {
  0%, 100% { transform: scaleY(1) scaleX(1); }
  40% { transform: scaleY(1.07) scaleX(0.96); }
  70% { transform: scaleY(0.97) scaleX(1.02); }
}

@media (prefers-reduced-motion: reduce) {
  .brand__flame { animation: none; }
}

.site-nav {
  display: flex;
  gap: 22px;
  font-size: 0.82rem;
  color: var(--text-2);
}

.site-nav a {
  color: var(--text-2);
  border-bottom: none;
  white-space: nowrap;
}

/* 狭い画面ではヘッダーを2段にして折り返しを防ぐ */
@media (max-width: 620px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 20px;
  }

  .site-nav {
    gap: 18px;
    font-size: 0.78rem;
  }
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
}

/* ---------- レイアウト ---------- */

.wrap {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 24px;
}

.wrap--wide {
  max-width: 1080px;
}

.label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 18px;
}

h1 {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0;
}

h2 {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0;
  margin: 0 0 10px;
  color: var(--text);
}

p {
  margin: 0 0 16px;
  color: var(--text-2);
}

.doc-head {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--border);
}

.doc-meta {
  margin: 20px 0 0;
  font-size: 0.82rem;
  color: var(--text-3);
}

.doc-body {
  padding: 56px 0 40px;
}

/* 条文セクション */

.article {
  padding: 0 0 40px;
}

.article h2 {
  position: relative;
  padding-left: 16px;
}

.article h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 3px;
  height: 1.05em;
  background: var(--accent);
  border-radius: 2px;
}

.article p {
  padding-left: 16px;
  margin-bottom: 0;
  white-space: pre-line;
}

/* 補足カード(多用しない) */

.callout {
  margin: 8px 0 48px;
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: 8px;
}

.callout p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-2);
}

.callout strong {
  color: var(--text);
  font-weight: 500;
}

/* ---------- トップページ ---------- */

.hero {
  padding: 104px 0 88px;
  text-align: left;
}

.hero__title {
  margin-bottom: 22px;
}

.hero__lead {
  font-size: 1.05rem;
  max-width: 34em;
}

.hero__actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  padding: 11px 22px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
}

.btn:hover {
  border-color: var(--text-3);
  color: var(--text);
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #17110a;
  font-weight: 700;
}

.btn--primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #17110a;
}

.section {
  padding: 72px 0;
  border-top: 1px solid var(--border);
}

.section__title {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 32px;
}

/* 機能リスト(グリッドは崩して2列 + 全幅の混在) */

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 40px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.feature-list li {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.94rem;
  color: var(--text-2);
}

.feature-list li span {
  color: var(--text);
  font-weight: 500;
}

@media (max-width: 640px) {
  .feature-list {
    grid-template-columns: 1fr;
  }
}

/* FAQ */

.faq dt {
  font-family: "Zen Kaku Gothic New", sans-serif;
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text);
  margin: 0 0 8px;
}

.faq dd {
  margin: 0 0 32px;
  color: var(--text-2);
  font-size: 0.94rem;
}

.faq dd:last-child {
  margin-bottom: 0;
}

/* お問い合わせ */

.contact-mail {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

/* ---------- フッター ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0 64px;
  margin-top: 32px;
}

.site-footer__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-3);
}

.site-footer nav {
  display: flex;
  gap: 22px;
}

.site-footer a {
  color: var(--text-2);
  border-bottom: none;
}

.site-footer a:hover {
  color: var(--text);
}