:root {
  --ink: #1f332b;
  --muted: #65746c;
  --paper: #f7fbf7;
  --panel: #ffffff;
  --line: #dce9de;
  --accent: #2f9f75;
  --accent-dark: #1d7655;
  --sage: #6f9078;
  --warm: #f0b85a;
  --shadow: 0 18px 46px rgba(28, 72, 54, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: #fff;
  background: linear-gradient(180deg, rgba(21, 55, 42, 0.72), rgba(21, 55, 42, 0));
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  background: rgba(47, 159, 117, 0.96);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 15px;
  line-height: 1.2;
}

.brand small {
  color: rgba(255, 255, 255, 0.78);
  font-size: 11px;
  line-height: 1.3;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.header-nav a {
  padding: 8px 10px;
}

.header-nav .nav-call {
  border: 1px solid rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.14);
}

.hero {
  position: relative;
  min-height: 88svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #fff;
  background: #dfeee4;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("assets/seitai-hero.png");
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
  filter: brightness(1.07) saturate(1.04);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(16, 47, 38, 0.78) 0%, rgba(16, 47, 38, 0.52) 48%, rgba(16, 47, 38, 0.08) 100%),
    linear-gradient(0deg, rgba(16, 47, 38, 0.56) 0%, rgba(16, 47, 38, 0.04) 58%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 128px 0 52px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--warm);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 780px;
  margin-bottom: 18px;
  font-size: clamp(35px, 6vw, 68px);
  line-height: 1.12;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 28px;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(16px, 2vw, 19px);
}

.hero-actions,
.access-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  font-weight: 800;
  line-height: 1.2;
}

.button.primary {
  color: #fff;
  background: var(--accent);
}

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

.button.secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.14);
}

.button.outline {
  color: var(--accent-dark);
  border-color: var(--accent);
  background: transparent;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(860px, 100%);
  margin: 44px 0 0;
  background: rgba(255, 255, 255, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.34);
}

.hero-facts div {
  padding: 16px;
  background: rgba(16, 47, 38, 0.42);
}

dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.hero-facts dt {
  color: rgba(255, 255, 255, 0.7);
}

dd {
  margin: 0;
  font-weight: 800;
}

section:not(.hero) {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.intro,
.access {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 420px);
  gap: clamp(24px, 6vw, 72px);
  padding: 76px 0;
  align-items: center;
}

.intro h2,
.section-heading h2,
.access h2,
.final-cta h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
}

.intro p,
.section-heading p,
.final-cta p {
  color: var(--muted);
  font-size: 16px;
}

.intro-panel,
.price-note {
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.intro-panel span,
.price-note span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent-dark);
  font-weight: 800;
}

.intro-panel ul {
  margin: 0;
  padding-left: 20px;
}

.symptoms {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  padding-bottom: 80px;
}

.symptoms article,
.strength-grid div,
.flow-steps article,
.review-grid figure {
  padding: 26px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.symptom-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  color: #fff;
  background: var(--sage);
  font-weight: 800;
}

.symptoms h3,
.flow h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.symptoms p,
.strength-grid span,
.flow p,
.review-grid figcaption {
  margin-bottom: 0;
  color: var(--muted);
}

.strength,
.price-section,
.flow,
.reviews,
.access,
.final-cta {
  border-top: 1px solid var(--line);
}

.strength,
.price-section,
.flow,
.reviews {
  padding: 78px 0;
}

.section-heading {
  max-width: 650px;
  margin-bottom: 28px;
}

.strength-grid,
.flow-steps,
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.strength-grid strong,
.strength-grid span {
  display: block;
}

.strength-grid strong {
  margin-bottom: 8px;
  font-size: 19px;
}

.price-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 340px);
  gap: 22px;
  align-items: start;
}

.price-table {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.price-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  padding: 20px 22px;
  border-bottom: 1px solid var(--line);
}

.price-row:last-child {
  border-bottom: 0;
}

.price-row strong,
.price-row span {
  display: block;
}

.price-row strong {
  margin-bottom: 4px;
  font-size: 18px;
}

.price-row span,
.price-note p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.price-row b {
  min-width: 82px;
  color: var(--accent-dark);
  font-size: 17px;
  text-align: right;
}

.flow-steps article span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  margin-bottom: 16px;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
}

.review-grid figure {
  margin: 0;
}

blockquote {
  margin: 0 0 20px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.6;
}

.access {
  align-items: stretch;
  padding: 78px 0;
}

.access dl {
  display: grid;
  gap: 14px;
  margin: 24px 0 28px;
}

.access dl div {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.map-card {
  display: grid;
  min-height: 360px;
  place-items: center;
  align-content: center;
  gap: 8px;
  padding: 28px;
  overflow: hidden;
  color: #fff;
  background:
    linear-gradient(rgba(47, 159, 117, 0.82), rgba(47, 159, 117, 0.82)),
    repeating-linear-gradient(45deg, rgba(255,255,255,0.18) 0 1px, transparent 1px 24px),
    #2f9f75;
  text-align: center;
}

.map-card strong {
  font-size: 28px;
  line-height: 1.25;
}

.map-card small {
  color: rgba(255, 255, 255, 0.82);
}

.map-pin {
  width: 58px;
  height: 58px;
  border: 14px solid #fff;
  border-radius: 50% 50% 50% 0;
  transform: rotate(-45deg);
}

.final-cta {
  padding: 80px 0 92px;
  text-align: center;
}

.final-cta h2,
.final-cta p {
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(18px, 4vw, 56px);
  color: rgba(255, 255, 255, 0.78);
  background: #1d3d31;
}

footer p,
footer small {
  margin: 0;
}

@media (max-width: 920px) {
  .symptoms,
  .strength-grid,
  .flow-steps,
  .review-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .site-header {
    padding: 12px 16px;
  }

  .header-nav a:not(.nav-call) {
    display: none;
  }

  .hero {
    min-height: 92svh;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(16, 47, 38, 0.78), rgba(16, 47, 38, 0.26)),
      linear-gradient(0deg, rgba(16, 47, 38, 0.64), rgba(16, 47, 38, 0.08));
  }

  .hero-content {
    padding-top: 112px;
  }

  .hero-facts,
  .intro,
  .symptoms,
  .strength-grid,
  .price-layout,
  .flow-steps,
  .review-grid,
  .access {
    grid-template-columns: 1fr;
  }

  .hero-facts div {
    padding: 13px 14px;
  }

  .intro,
  .strength,
  .price-section,
  .flow,
  .reviews,
  .access {
    padding: 58px 0;
  }

  .symptoms {
    padding-bottom: 58px;
  }

  .price-row,
  .access dl div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .price-row b {
    text-align: left;
  }

  .map-card {
    min-height: 260px;
  }

  footer {
    display: block;
  }
}

@media (max-width: 520px) {
  .brand small {
    display: none;
  }

  .brand strong {
    font-size: 14px;
  }

  .button {
    width: 100%;
  }

  .hero-actions,
  .access-actions {
    width: 100%;
  }

  .hero-facts {
    margin-top: 32px;
  }
}