/* ============================================================
   見る菌®︎ C-Type 歯科医院向けサイト スタイルシート
   ============================================================ */

:root {
  --color-primary: #D8005E;
  --color-primary-light: #F04A88;
  --color-accent: #003C88;
  --color-accent-light: #236CB6;
  --color-text: #111827;
  --color-text-soft: #4B5563;
  --color-bg: #FFFFFF;
  --color-bg-soft: #F7F8FA;
  --color-border: #E5E7EB;

  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));

  --font-base: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: auto; }

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { line-height: 1.5; margin: 0; letter-spacing: 0.02em; }

p { margin: 0; }

a { color: inherit; text-decoration: none; }

ul { list-style: none; margin: 0; padding: 0; }

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

/* ---------- ボタン ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.04em;
  transition: opacity 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }

.btn-primary { background: var(--gradient-primary); color: #fff; }
.btn-outline { background: transparent; color: var(--color-accent); border: 1.5px solid var(--color-accent); }
.btn-outline-light { color: #fff; border-color: rgba(255,255,255,0.7); }
.btn-small { padding: 10px 22px; font-size: 13px; }

.cta-group { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }
.cta-group-center { justify-content: center; }

/* ---------- アイコン ---------- */
.icon { width: 28px; height: 28px; color: var(--color-primary); flex-shrink: 0; }
.icon-accent { color: var(--color-accent); }
.icon-lg { width: 40px; height: 40px; }

/* ---------- ヘッダー ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #FFFFFF;
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; }
.logo-img { height: 34px; width: auto; display: block; }
.logo-img-footer { height: 30px; filter: brightness(0) invert(1); }

.site-nav { display: flex; align-items: center; gap: 32px; font-size: 14px; font-weight: 500; }
.site-nav a { color: var(--color-text-soft); }
.site-nav a:hover { color: var(--color-primary); }
.nav-cta { margin-left: 8px; }

.nav-toggle-input { display: none; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  width: 28px;
}
.nav-toggle span { display: block; height: 2px; background: var(--color-text); border-radius: 2px; }

/* ---------- ヒーロー ---------- */
.hero { padding: 96px 0 100px; background: var(--color-bg); }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background: rgba(216,0,94,0.07);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
}

.hero-text h1 { font-size: 42px; font-weight: 700; margin-bottom: 28px; }
.hero-lead { font-size: 16px; color: var(--color-text-soft); }

.hero-visual { display: flex; flex-direction: column; gap: 20px; }

.hero-photo {
  width: 100%;
  border-radius: 16px;
  display: block;
  object-fit: cover;
}
.hero-photo:not(.hero-photo-sub) { aspect-ratio: 4 / 3; }
.hero-photo-sub { max-height: 220px; object-position: top; }

.section-photo {
  width: 100%;
  border-radius: 16px;
  display: block;
  object-fit: cover;
}

/* ---------- セクション共通 ---------- */
.section { padding: 100px 0; }
.section-soft { background: var(--color-bg-soft); }

.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.section-title { font-size: 32px; font-weight: 700; margin-bottom: 20px; }
.section-title-light { color: #fff; }
.section-lead { font-size: 16px; color: var(--color-text-soft); max-width: 760px; margin-bottom: 56px; }

.section-cta { margin-top: 48px; text-align: center; }

/* ---------- グリッド／カード ---------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: 1fr 1fr; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-6 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.card p { font-size: 15px; font-weight: 500; }

.card-plain {
  align-items: center;
  text-align: center;
  background: var(--color-bg-soft);
  border: none;
}

.observe-grid .card-plain p { font-size: 15px; font-weight: 600; }

/* ---------- なぜ見るのか：フロー図 ---------- */
.flow-diagram {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 64px;
}
.flow-step {
  background: var(--color-bg);
  border: 1.5px solid var(--color-accent);
  color: var(--color-accent);
  border-radius: 999px;
  padding: 14px 26px;
  font-weight: 600;
  font-size: 14px;
}
.flow-step-end { background: var(--gradient-accent); color: #fff; border-color: transparent; }
.icon-flow-arrow { width: 18px; height: 18px; color: #9CA3AF; }

.process-steps { margin-top: 8px; }
.process-step {
  background: var(--color-bg);
  border-radius: 16px;
  padding: 32px 28px;
}
.process-number {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}
.process-step h3 { font-size: 17px; font-weight: 700; margin-bottom: 12px; }
.process-step p { font-size: 14px; color: var(--color-text-soft); }

/* ---------- 導入メリット ---------- */
.merit-grid { margin-bottom: 8px; }
.merit-card {
  background: var(--color-bg);
  border-radius: 16px;
  padding: 40px 36px;
}
.merit-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 24px; color: var(--color-accent); }
.check-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}
.check-list li:last-child { border-bottom: none; }
.check-list .icon { width: 20px; height: 20px; color: var(--color-primary); }

/* ---------- アカデミー ---------- */
.academy-inner, .c-type-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

/* ---------- C-Type ---------- */
.feature-list { margin: 32px 0 40px; display: flex; flex-direction: column; gap: 18px; }
.feature-list li { display: flex; align-items: center; gap: 14px; font-size: 16px; font-weight: 600; }

/* ---------- 信頼性 ---------- */
.trust-grid { margin-bottom: 40px; }
.trust-card {
  background: var(--color-bg-soft);
  border-radius: 16px;
  padding: 40px 32px;
}
.trust-card h3 { font-size: 18px; font-weight: 700; margin: 20px 0 12px; }
.trust-card p { font-size: 14px; color: var(--color-text-soft); }
.trust-cert-img {
  width: 96px;
  border-radius: 6px;
  box-shadow: 0 2px 10px rgba(17,24,39,0.12);
  display: block;
}
.trust-note { font-size: 13px; color: #9CA3AF; max-width: 760px; }

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; margin-bottom: 8px; }
.faq-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 20px 24px;
}
.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -2px;
  font-size: 20px;
  color: var(--color-primary);
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin-top: 16px; font-size: 14px; color: var(--color-text-soft); }

/* ---------- 最終CTA ---------- */
.section-final {
  background: var(--gradient-accent);
  text-align: center;
}
.section-final .section-title { max-width: 700px; margin: 0 auto 8px; }

/* ---------- フッター ---------- */
.site-footer { background: var(--color-text); color: #D1D5DB; padding: 64px 0 32px; }
.footer-inner { display: flex; flex-direction: column; gap: 32px; align-items: center; text-align: center; }
.footer-brand { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.footer-brand .logo-text { color: #fff; font-weight: 700; }
.footer-brand p { font-size: 13px; color: #9CA3AF; }
.footer-nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 24px; font-size: 13px; }
.footer-nav a:hover { color: #fff; }
.footer-copy { font-size: 12px; color: #6B7280; }

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 960px) {
  .hero-inner, .academy-inner, .c-type-inner { grid-template-columns: 1fr; }
  .c-type-visual { order: -1; }
  .grid-6, .grid-3, .grid-2 { grid-template-columns: 1fr 1fr; }
  .hero-text h1 { font-size: 34px; }
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
  .site-nav {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 20px 20px;
    border-bottom: 1px solid var(--color-border);
  }
  .site-nav a { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--color-border); }
  .nav-cta { margin: 16px 0 0; }
  .nav-toggle { display: flex; }
  .nav-toggle-input:checked ~ .site-nav { display: flex; }

  .hero { padding: 56px 0 64px; }
  .hero-text h1 { font-size: 28px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 24px; }
  .grid-6, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .flow-diagram { flex-direction: column; align-items: stretch; }
  .flow-step { text-align: center; }
  .icon-flow-arrow { transform: rotate(90deg); align-self: center; }
  .cta-group { flex-direction: column; }
  .btn { width: 100%; }
}