/* ============================================
   むすびめ(仮称)LP — スマホ最優先のモバイルファースト設計
   ============================================ */

:root {
  --color-bg: #faf3ea;
  --color-ink: #4a3a30;
  --color-ink-light: #8a6a55;
  --color-accent: #a05a38;      /* テラコッタ:Twitterヘッダーと同系 */
  --color-accent-warm: #c96a45; /* 暖色:CTA用 */
  --color-card: #fffaf3;
  --color-line: #ecd9c6;
  --font-serif: "Zen Maru Gothic", "Noto Sans JP", sans-serif;
  --font-sans: "Noto Sans JP", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-ink);
  line-height: 1.9;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--color-accent); }

.sp-only { display: inline; }
@media (min-width: 768px) { .sp-only { display: none; } }

/* ---------- ボタン ---------- */
.btn {
  display: block;
  width: 100%;
  max-width: 360px;
  margin: 0 auto;
  padding: 18px 24px;
  border-radius: 999px;
  text-align: center;
  text-decoration: none;
  font-weight: 700;
  font-size: 17px;
  transition: opacity 0.2s, transform 0.1s;
}
.btn:active { transform: scale(0.98); }
.btn--primary {
  background: var(--color-accent-warm);
  color: #fff;
  box-shadow: 0 4px 16px rgba(201, 111, 69, 0.35);
}
.btn--primary:hover { opacity: 0.9; }

/* ---------- サイトヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: rgba(250, 243, 234, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-line);
}
.site-header__logo {
  display: inline;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--color-ink);
  text-decoration: none;
}
.site-header__dot { color: var(--color-accent-warm); }
.site-header__mark {
  width: 26px;
  height: 26px;
  display: inline-block;
  vertical-align: -0.3em;
  margin-right: 8px;
}
.site-header__brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
  padding-right: 12px;
}
.site-header__tagline {
  font-size: 10px;
  line-height: 1.5;
  color: var(--color-ink-light);
}
@media (min-width: 768px) {
  .site-header__brand {
    flex-direction: row;
    align-items: baseline;
    gap: 14px;
  }
  .site-header__tagline {
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}
.site-header__cta {
  background: var(--color-accent-warm);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: 999px;
  transition: opacity 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}
.site-header__cta:hover { opacity: 0.9; }

/* ---------- ファーストビュー ---------- */
.hero {
  padding: 72px 24px 56px;
  text-align: center;
  background: linear-gradient(180deg, #f6e3d3 0%, var(--color-bg) 100%);
}
.hero__badge {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 28px;
}
.hero__title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: 28px;
  line-height: 1.6;
  margin-bottom: 16px;
}
.hero__sub {
  font-family: var(--font-serif);
  font-size: 17px;
  color: var(--color-accent);
  margin-bottom: 28px;
}
.hero__lead {
  font-size: 14px;
  color: var(--color-ink-light);
  margin-bottom: 32px;
}
.hero__note {
  font-size: 12px;
  color: var(--color-ink-light);
  margin-top: 12px;
}
.hero__illust {
  display: block;
  width: min(440px, 92%);
  margin: 0 auto 36px;
}

/* ---------- セクション共通 ---------- */
.section { padding: 64px 24px; max-width: 720px; margin: 0 auto; }
.section__title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.6;
  text-align: center;
  margin-bottom: 32px;
}
.section__lead {
  text-align: center;
  color: var(--color-ink-light);
  margin-bottom: 32px;
  font-size: 15px;
}

/* ---------- 共感パート ---------- */
.empathy__illust {
  display: block;
  width: min(300px, 78%);
  margin: 0 auto 32px;
}
.empathy__body { margin-bottom: 32px; }
.empathy__body p { margin-bottom: 20px; }

.databox {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: 28px 24px;
  margin-bottom: 32px;
}
.databox__title {
  font-size: 17px;
  margin-bottom: 16px;
  color: var(--color-accent);
}
.databox__list { list-style: none; }
.databox__list li {
  padding-left: 1.2em;
  position: relative;
  margin-bottom: 12px;
  font-size: 14px;
}
.databox__list li::before {
  content: "・";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}
.databox__source {
  font-size: 11px;
  color: var(--color-ink-light);
  margin: 12px 0 16px;
}
.databox__conclusion { font-size: 15px; }

/* ---------- 第3の選択肢 ---------- */
.choice__icon {
  display: block;
  width: 52px;
  height: 52px;
  margin-bottom: 14px;
}
.choice__grid { display: grid; gap: 16px; margin-bottom: 28px; }
.choice__card {
  border-radius: 12px;
  padding: 24px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
}
.choice__card h3 { font-size: 16px; margin-bottom: 8px; }
.choice__card p { font-size: 14px; color: var(--color-ink-light); }
.choice__card--ng { opacity: 0.75; }
.choice__card--ok {
  border: 2px solid var(--color-accent-warm);
  background: #f8e9da;
}
.choice__card--ok h3 { color: var(--color-accent); }
.choice__card--ok p { color: var(--color-ink); }
.choice__note { text-align: center; font-size: 14px; color: var(--color-ink-light); }

@media (min-width: 768px) {
  .choice__grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ---------- ステップ ---------- */
.steps__choices {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.steps__choice {
  background: var(--color-card);
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
}
.steps__choices-note {
  text-align: center;
  font-size: 12px;
  color: var(--color-ink-light);
  margin-bottom: 40px;
}
.steps { list-style: none; position: relative; margin-bottom: 40px; }
.steps::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-line);
}
.step {
  position: relative;
  padding: 0 0 36px 62px;
}
.step__icon {
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 46px;
}
.step__head { margin-bottom: 4px; }
.step__num {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 14px;
  margin-right: 10px;
}
.step__period { font-size: 12px; color: var(--color-ink-light); }
.step__name {
  font-family: var(--font-serif);
  font-size: 19px;
  margin-bottom: 8px;
}
.step__desc { font-size: 14px; color: var(--color-ink-light); }

.step__body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.step__mock {
  width: 168px;
  margin: 4px auto 0;
}
.steps__mock-note {
  font-size: 11px;
  color: var(--color-ink-light);
  text-align: center;
  margin-bottom: 40px;
}
@media (min-width: 768px) {
  .step__body {
    flex-direction: row;
    align-items: flex-start;
    gap: 24px;
  }
  .step__text { flex: 1; }
  .step__mock { width: 148px; flex: none; margin: 0; }
}

.steps__rules {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: 24px;
}
.steps__rules h3 { font-size: 15px; margin-bottom: 12px; }
.steps__rules ul { list-style: none; }
.steps__rules li {
  font-size: 14px;
  padding-left: 1.2em;
  position: relative;
  margin-bottom: 8px;
}
.steps__rules li::before {
  content: "・";
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

/* ---------- 安心設計 ---------- */
.section--safety { max-width: 840px; }
.safety__list { list-style: none; display: grid; gap: 16px; }
.safety__item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 12px;
  padding: 24px;
}
.safety__icon {
  width: 44px;
  height: 44px;
  margin-bottom: 12px;
}
.safety__item h3 {
  font-size: 16px;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.safety__item p { font-size: 14px; color: var(--color-ink-light); }

@media (min-width: 768px) {
  .safety__list { grid-template-columns: 1fr 1fr; }
  .safety__list--three { grid-template-columns: 1fr 1fr 1fr; }
}

/* ---------- 登録セクション ---------- */
.section--register { text-align: center; }
.form-embed { margin-bottom: 32px; }
.form-embed iframe {
  width: 100%;
  min-height: 1800px; /* フォーム全体(送信ボタンまで)が内部スクロールなしで表示される高さ */
  border: none;
  border-radius: 12px;
}
.form-embed__placeholder {
  border: 2px dashed var(--color-line);
  border-radius: 12px;
  padding: 48px 24px;
  color: var(--color-ink-light);
  font-size: 14px;
}
.form-embed__hint { font-size: 12px; margin-top: 8px; }
.form-embed__hint code {
  background: #f1e4d4;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
}

/* ---------- X導線(フォーム下) ---------- */
.register__follow {
  margin-top: 8px;
  padding-top: 28px;
  border-top: 1px solid var(--color-line);
}
.register__follow-text {
  font-size: 14px;
  color: var(--color-ink-light);
  margin-bottom: 14px;
}
.register__follow-btn {
  display: inline-block;
  background: #0f1419;
  color: #ffffff;
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  padding: 11px 26px;
  border-radius: 999px;
  transition: opacity 0.2s;
}
.register__follow-btn:hover { opacity: 0.85; }

/* ---------- 下層ページ(プラポリ・運営者情報) ---------- */
.doc {
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.doc h1 {
  font-family: var(--font-serif);
  font-size: 26px;
  margin-bottom: 24px;
}
.doc h2 {
  font-size: 16px;
  color: var(--color-accent);
  margin: 32px 0 8px;
}
.doc p, .doc li {
  font-size: 14px;
  color: var(--color-ink-light);
}
.doc ul {
  padding-left: 1.4em;
  margin: 8px 0;
}
.doc .doc-date {
  font-size: 12px;
  margin-top: 32px;
}
.doc a { color: var(--color-accent); }

/* ---------- フッター ---------- */
.footer {
  padding: 48px 24px 64px;
  text-align: center;
  font-size: 13px;
  color: var(--color-ink-light);
  border-top: 1px solid var(--color-line);
  margin-top: 32px;
}
.footer p { margin-bottom: 12px; }
.footer__copy { font-size: 11px; }

/* ---------- デスクトップ調整 ---------- */
@media (min-width: 768px) {
  .hero { padding: 120px 24px 80px; }
  .hero__title { font-size: 40px; }
  .hero__sub { font-size: 20px; }
  .hero__lead { font-size: 16px; }
  .section__title { font-size: 30px; }
}