:root {
  --color-primary: #101715;
  --color-on-primary: #fffaf1;
  --color-secondary: #546a52;
  --color-on-secondary: #fffaf1;
  --color-tertiary: #a06c3f;
  --color-accent: #3e7ff0;
  --color-surface: #f7f1e6;
  --color-surface-soft: #fbf7ee;
  --color-surface-deep: #e8ddca;
  --color-ink: #17201d;
  --color-ink-muted: #3c4a45;
  --color-border: #d8ccb9;
  --color-line: rgba(23, 32, 29, 0.16);
  --radius-sm: 4px;
  --radius-md: 8px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 72px;
  --shadow-soft: 0 18px 56px rgba(16, 23, 21, 0.16);
  --shadow-product: 0 26px 84px rgba(16, 23, 21, 0.24);
  --measure: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--color-primary);
}

body {
  margin: 0;
  color: var(--color-ink);
  background:
    linear-gradient(180deg, rgba(232, 221, 202, 0.42) 0, rgba(247, 241, 230, 0) 460px),
    var(--color-surface);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0;
}

body > #vdbanner {
  position: relative;
  z-index: 100;
  pointer-events: auto;
}

img {
  display: block;
  max-width: 100%;
}

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

:focus-visible {
  outline: 3px solid rgba(62, 127, 240, 0.72);
  outline-offset: 3px;
}

::selection {
  color: var(--color-on-primary);
  background: var(--color-secondary);
}

.site-header {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: 0 max(20px, calc((100vw - var(--measure)) / 2));
  color: var(--color-on-primary);
  background: rgba(16, 23, 21, 0.97);
  border-bottom: 1px solid rgba(255, 250, 241, 0.1);
}

.site-header.is-scrolled {
  color: var(--color-on-primary);
  background: rgba(16, 23, 21, 0.97);
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
  font-size: 14px;
}

.site-nav a {
  min-height: 36px;
  padding: 5px 11px;
  color: rgba(255, 250, 241, 0.8);
  border-radius: var(--radius-md);
}

.site-nav a:hover {
  color: var(--color-on-primary);
  background: rgba(255, 250, 241, 0.08);
}

.hero {
  position: relative;
  min-height: 680px;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: var(--color-primary);
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  object-fit: cover;
  filter: saturate(0.86) contrast(1.02);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(10, 16, 14, 0.88) 0%, rgba(10, 16, 14, 0.64) 40%, rgba(10, 16, 14, 0.18) 78%),
    linear-gradient(180deg, rgba(10, 16, 14, 0.12) 0%, rgba(10, 16, 14, 0.82) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(var(--measure), calc(100% - 40px));
  margin: 0 auto;
  padding: 118px 0 48px;
  color: var(--color-on-primary);
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--color-tertiary);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 10.5rem;
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-copy {
  width: min(680px, 100%);
  margin: 30px 0 0;
  font-size: 1.35rem;
  line-height: 1.75;
  color: rgba(255, 250, 241, 0.9);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 36px;
}

.button {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  border: 1px solid rgba(255, 250, 241, 0.42);
  border-radius: var(--radius-md);
  font-weight: 700;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: var(--color-primary);
  background: var(--color-on-primary);
  border-color: var(--color-on-primary);
}

.button.ghost {
  color: var(--color-on-primary);
  background: rgba(255, 250, 241, 0.08);
}

.button.ghost:hover {
  background: rgba(255, 250, 241, 0.14);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(720px, 100%);
  margin: 58px 0 0;
  padding: 1px;
  background: rgba(255, 250, 241, 0.18);
  border: 1px solid rgba(255, 250, 241, 0.2);
}

.hero-meta div {
  padding: 16px 18px;
  background: rgba(10, 16, 14, 0.34);
}

.hero-meta dt {
  color: rgba(255, 250, 241, 0.58);
  font-size: 11px;
  text-transform: uppercase;
}

.hero-meta dd {
  margin: 4px 0 0;
  font-weight: 700;
}

.intro,
.showcase,
.features,
.ritual,
.download {
  width: min(var(--measure), calc(100% - 40px));
  margin: 0 auto;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: var(--space-xl);
  align-items: end;
  padding: 112px 0 104px;
}

.intro-copy p {
  width: min(820px, 100%);
  margin: 28px 0 0;
  color: var(--color-ink-muted);
  font-size: 1.08rem;
}

.intro h2,
.showcase h2,
.section-heading h2,
.ritual h2,
.download h2 {
  margin: 0;
  font-family: Georgia, "Times New Roman", "Yu Mincho", serif;
  font-size: 4rem;
  font-weight: 500;
  line-height: 1.12;
  letter-spacing: 0;
}

.intro-points {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.intro-points div {
  padding: 18px;
  background: rgba(255, 250, 241, 0.52);
}

.intro-points dt {
  color: var(--color-secondary);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.45rem;
  font-weight: 600;
}

.intro-points dd {
  margin: 4px 0 0;
  color: var(--color-ink-muted);
  font-size: 0.92rem;
}

.showcase {
  display: grid;
  grid-template-columns: 1fr;
  gap: 42px;
  align-items: start;
  padding: 84px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.showcase-text {
  max-width: 860px;
}

.showcase-text p,
.download-copy > p {
  margin: 22px 0 0;
  color: var(--color-ink-muted);
  font-size: 1.06rem;
}

.product-figure {
  margin: 0;
  overflow: hidden;
  background: var(--color-primary);
  border: 1px solid rgba(16, 23, 21, 0.18);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-product);
}

.product-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.features {
  padding: 112px 0;
}

.section-heading {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: var(--space-lg);
  align-items: end;
  margin-bottom: 42px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.feature {
  min-height: 252px;
  padding: 30px;
  background: rgba(255, 250, 241, 0.62);
  transition: background 180ms ease;
}

.feature:hover {
  background: var(--color-surface-soft);
}

.feature-mark {
  display: inline-flex;
  min-width: 34px;
  min-height: 24px;
  align-items: center;
  color: var(--color-tertiary);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 14px;
  font-weight: 600;
}

.feature h3 {
  margin: 34px 0 10px;
  color: var(--color-ink);
  font-size: 1.25rem;
  line-height: 1.45;
}

.feature p {
  margin: 0;
  color: var(--color-ink-muted);
  font-size: 0.98rem;
}

.ritual {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: var(--space-xl);
  padding: 88px 0;
  border-top: 1px solid var(--color-line);
}

.steps,
.install-steps {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--color-line);
  border: 1px solid var(--color-line);
}

.steps li {
  padding: 26px;
  color: var(--color-on-primary);
  background: var(--color-primary);
}

.steps span,
.install-steps span {
  display: block;
  font-weight: 700;
}

.steps p {
  margin: 8px 0 0;
  color: rgba(255, 250, 241, 0.72);
}

.download {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 400px);
  gap: var(--space-xl);
  align-items: start;
  padding: 92px 0 118px;
}

.install-steps {
  margin-top: 30px;
}

.install-steps li {
  padding: 20px 22px;
  background: rgba(255, 250, 241, 0.62);
}

.install-steps p {
  margin: 6px 0 0;
  color: var(--color-ink-muted);
  font-size: 0.94rem;
  line-height: 1.7;
}

.install-steps strong {
  color: var(--color-ink);
  font-weight: 700;
}

.download-panel {
  display: grid;
  gap: 14px;
  padding: 30px;
  color: var(--color-on-primary);
  background:
    linear-gradient(180deg, rgba(255, 250, 241, 0.08), rgba(255, 250, 241, 0)),
    var(--color-primary);
  border: 1px solid rgba(255, 250, 241, 0.12);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.download-panel:hover {
  background:
    linear-gradient(180deg, rgba(255, 250, 241, 0.12), rgba(255, 250, 241, 0.02)),
    var(--color-primary);
}

.download-panel img {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-md);
}

.download-panel span {
  overflow-wrap: anywhere;
  color: rgba(255, 250, 241, 0.74);
}

.download-panel strong {
  justify-self: start;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 250, 241, 0.2);
  font-size: 1.45rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px max(20px, calc((100vw - var(--measure)) / 2));
  color: rgba(255, 250, 241, 0.68);
  background: var(--color-primary);
  font-size: 13px;
}

@media (max-width: 900px) {
  .site-header {
    min-height: 64px;
  }

  .hero {
    min-height: 640px;
  }

  .hero h1 {
    font-size: 6.5rem;
  }

  .hero-copy {
    font-size: 1.15rem;
  }

  .intro,
  .section-heading,
  .ritual,
  .download {
    grid-template-columns: 1fr;
  }

  .intro {
    gap: var(--space-lg);
    padding: 88px 0;
  }

  .intro h2,
  .showcase h2,
  .section-heading h2,
  .ritual h2,
  .download h2 {
    font-size: 3rem;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .site-nav {
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    min-height: 620px;
  }

  .hero-inner,
  .intro,
  .showcase,
  .features,
  .ritual,
  .download {
    width: min(100% - 28px, var(--measure));
  }

  .hero-inner {
    padding-top: 78px;
  }

  .hero h1 {
    font-size: 4.6rem;
  }

  .hero-meta {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .intro h2,
  .showcase h2,
  .section-heading h2,
  .ritual h2,
  .download h2 {
    font-size: 2.35rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature {
    min-height: auto;
  }

  .site-footer {
    flex-direction: column;
  }
}