:root {
  --ink: #222629;
  --charcoal: #2c3336;
  --muted: #777d7f;
  --stone: #ebe9e5;
  --paper: #f7f6f3;
  --white: #ffffff;
  --line: rgba(44, 51, 54, 0.14);
  --shadow: 0 20px 46px rgba(37, 43, 45, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 0%, rgba(255, 255, 255, 0.9), transparent 24rem),
    linear-gradient(180deg, #efede9 0%, var(--paper) 45%, #e8e5df 100%);
  font-family: "Noto Serif JP", serif;
  line-height: 1.9;
  letter-spacing: 0.05em;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  width: 100%;
  height: auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  width: min(980px, calc(100% - 24px));
  margin: 0 auto;
  padding: 12px 14px;
  background: rgba(247, 246, 243, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-top: 0;
  border-radius: 0 0 18px 18px;
  box-shadow: 0 14px 28px rgba(37, 43, 45, 0.08);
  backdrop-filter: blur(14px);
}

.brand,
.footer-brand {
  display: inline-grid;
  color: var(--ink);
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 0.82;
  letter-spacing: 0.18em;
}

.brand span,
.footer-brand span {
  color: var(--muted);
  font-size: 0.52em;
  letter-spacing: 0.42em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-family: "Noto Sans JP", sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.nav a {
  transition: color 0.18s ease, transform 0.18s ease;
}

.nav a:hover {
  color: var(--ink);
  transform: translateY(-1px);
}

.nav-cta,
.primary,
.floating {
  color: #fff;
  background: var(--charcoal);
  border-radius: 6px;
  box-shadow: 0 12px 24px rgba(37, 43, 45, 0.2);
}

.nav-cta {
  padding: 9px 16px;
}

main {
  width: min(980px, 100%);
  margin: -1px auto 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) 1fr;
  align-items: center;
  gap: clamp(22px, 5vw, 56px);
  padding: clamp(16px, 3vw, 34px);
  background: rgba(255, 255, 255, 0.58);
  border-radius: 0 0 26px 26px;
  box-shadow: var(--shadow);
}

.hero-visual {
  overflow: hidden;
  border-radius: 16px;
  box-shadow: 0 20px 42px rgba(37, 43, 45, 0.16);
}

.hero-copy {
  max-width: 460px;
}

.label,
.section-kicker {
  margin: 0 0 14px;
  color: var(--muted);
  font-family: "Cormorant Garamond", serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.24em;
  text-transform: lowercase;
}

h1,
.concept h2,
.scene-section h2,
.dog-section h2 {
  margin: 0;
  color: var(--ink);
  font-weight: 500;
  line-height: 1.35;
}

h1 {
  font-size: clamp(34px, 5.5vw, 64px);
}

.hero-copy p:not(.label),
.concept > p,
.dog-section p,
.concept-grid p,
.scene-cards p {
  color: var(--muted);
  font-family: "Noto Sans JP", sans-serif;
  font-size: clamp(14px, 2vw, 16px);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 10px 24px;
  font-family: "Noto Sans JP", sans-serif;
  font-size: 14px;
  font-weight: 700;
}

.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.concept,
.scene-section,
.dog-section {
  width: min(900px, calc(100% - 28px));
  margin: clamp(18px, 3.4vw, 36px) auto 0;
  padding: clamp(30px, 5vw, 58px);
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.concept {
  text-align: center;
}

.concept h2,
.scene-section h2,
.dog-section h2 {
  font-size: clamp(28px, 4.6vw, 48px);
}

.concept > p {
  max-width: 680px;
  margin: 18px auto 0;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 34px;
}

.concept-grid article,
.scene-cards article,
.dog-note {
  padding: 22px;
  background: rgba(247, 246, 243, 0.78);
  border: 1px solid var(--line);
  border-radius: 14px;
}

.concept-grid span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-family: "Cormorant Garamond", serif;
  font-size: 24px;
  letter-spacing: 0.12em;
}

.concept-grid h3,
.scene-cards h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 500;
}

.concept-grid p,
.scene-cards p {
  margin: 0;
}

.section-heading {
  text-align: center;
}

.scene-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.scene-cards article {
  display: grid;
  gap: 16px;
  padding: 12px;
}

.scene-cards img {
  aspect-ratio: 3 / 2;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 10px;
  filter: saturate(0.88) contrast(0.96);
}

.scene-cards article div {
  padding: 0 10px 10px;
}

.dog-section {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: clamp(18px, 4vw, 36px);
  align-items: center;
}

.dog-note span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--ink);
  font-family: "Cormorant Garamond", serif;
  font-size: 24px;
  letter-spacing: 0.16em;
}

.access {
  overflow: hidden;
  margin-top: clamp(18px, 3.4vw, 36px);
  background: var(--paper);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.footer {
  width: min(980px, 100%);
  margin: clamp(18px, 3.4vw, 36px) auto 0;
  padding: 44px 24px 34px;
  color: #d8d6d1;
  text-align: center;
  background: var(--charcoal);
}

.footer-brand {
  justify-content: center;
  margin: 0 auto 14px;
  color: #fff;
}

.footer-brand span {
  color: #c7c3bc;
}

.footer p {
  margin: 0 0 12px;
}

.footer small {
  color: rgba(255, 255, 255, 0.48);
  font-family: "Cormorant Garamond", serif;
  letter-spacing: 0.16em;
}

.floating {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 16px;
  font-family: "Cormorant Garamond", serif;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.16em;
}

@media (max-width: 820px) {
  .site-header {
    width: 100%;
    border-radius: 0;
    padding: 10px 12px;
  }

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

  .hero,
  .dog-section {
    grid-template-columns: 1fr;
  }

  .hero {
    border-radius: 0 0 20px 20px;
  }

  .hero-copy {
    text-align: center;
    margin: 0 auto;
  }

  .hero-actions {
    justify-content: center;
  }

  .concept-grid,
  .scene-cards {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 26px;
  }

  .nav-cta {
    padding: 8px 12px;
    font-size: 11px;
  }

  .hero,
  .concept,
  .scene-section,
  .dog-section {
    padding: 24px 18px;
  }

  .hero-actions {
    display: grid;
  }

  .primary,
  .secondary {
    width: 100%;
  }

  .floating {
    right: 10px;
    bottom: 10px;
    min-height: 42px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .nav a {
    transition: none;
  }
}