:root {
  --bg: #120817;
  --bg-2: #1c0f28;
  --panel: rgba(23, 12, 34, 0.82);
  --line: rgba(193, 143, 255, 0.18);
  --text: #f7f2ff;
  --muted: #b9abc9;
  --accent: #d48eff;
  --accent-2: #8f6cff;
  --accent-soft: #f4b5ff;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(
      circle at 20% 20%,
      rgba(212, 142, 255, 0.18),
      transparent 28%
    ),
    radial-gradient(
      circle at 78% 18%,
      rgba(143, 108, 255, 0.18),
      transparent 24%
    ),
    linear-gradient(140deg, #09050f 0%, #120817 40%, #251237 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent 92%);
  pointer-events: none;
}

.page-shell {
  position: relative;
  overflow: hidden;
}

.noise {
  position: fixed;
  inset: 0;
  opacity: 0.08;
  pointer-events: none;
  background-image:
    radial-gradient(
      circle at 25% 25%,
      rgba(255, 255, 255, 0.65) 0 1px,
      transparent 1px
    ),
    radial-gradient(
      circle at 75% 75%,
      rgba(255, 255, 255, 0.4) 0 1px,
      transparent 1px
    );
  background-size:
    18px 18px,
    21px 21px;
  mix-blend-mode: soft-light;
}

.topbar,
.hero,
.feature-grid,
.closing-band {
  width: min(calc(100% - 40px), var(--max-width));
  margin-inline: auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0 10px;
}

.brand,
.topbar-link,
.button,
.asset-link {
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-family: "Jura", sans-serif;
  font-size: 1.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.brand img {
  border-radius: 14px;
  box-shadow: 0 14px 30px rgba(7, 13, 22, 0.42);
}

.topbar-link {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(18px);
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.topbar-link:hover,
.topbar-link:focus-visible,
.asset-link:hover,
.asset-link:focus-visible {
  transform: translateY(-1px);
}

.topbar-link:hover,
.topbar-link:focus-visible {
  border-color: rgba(212, 142, 255, 0.45);
  background: rgba(212, 142, 255, 0.08);
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  text-align: center;
  padding: 64px 0 44px;
}

.hero-copy {
  width: min(100%, 920px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-family: "Jura", sans-serif;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.28em;
}

h1,
h2,
.feature-index {
  font-family: "Jura", sans-serif;
}

h1 {
  margin: 0;
  font-size: clamp(3.4rem, 10vw, 6.2rem);
  line-height: 0.98;
  letter-spacing: 0.06em;
  font-weight: 500;
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.lead {
  margin: 22px auto 0;
  max-width: 24em;
  font-size: clamp(1.1rem, 1.7vw, 1.45rem);
  line-height: 1.65;
  text-wrap: balance;
}

.sublead {
  margin: 18px auto 0;
  max-width: 36rem;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.9;
}

.cta-cluster {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  min-height: 66px;
  min-width: 300px;
  padding: 0 30px;
  border-radius: 22px;
  font-weight: 500;
  letter-spacing: 0.06em;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button-primary {
  color: #170a1f;
  background: linear-gradient(
    135deg,
    var(--accent) 0%,
    var(--accent-soft) 52%,
    #ffffff 100%
  );
  box-shadow:
    0 20px 46px rgba(212, 142, 255, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow:
    0 24px 54px rgba(212, 142, 255, 0.38),
    inset 0 1px 0 rgba(255, 255, 255, 0.48);
}

.button-secondary {
  color: var(--text);
  border: 1px solid rgba(154, 173, 193, 0.26);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(18px);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(212, 142, 255, 0.55);
  background: rgba(212, 142, 255, 0.08);
}

.button-compact {
  min-height: 52px;
  min-width: 210px;
  padding: 0 22px;
  border-radius: 18px;
  font-size: 0.94rem;
}

.button-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.4rem;
  height: 1.4rem;
}

.button-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.feature-card {
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.hero-visual {
  position: relative;
  display: grid;
  justify-items: center;
}

.hero-emblem {
  width: min(100%, 220px);
}

.hero-emblem img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 28px;
  filter: drop-shadow(0 28px 44px rgba(0, 0, 0, 0.34));
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1100px;
  padding: 18px 0 24px;
}

.feature-card {
  position: relative;
  min-height: 0;
  padding: 28px 28px 24px;
  border-radius: 28px;
  overflow: hidden;
  text-align: center;
}

.feature-card::after {
  content: "";
  position: absolute;
  inset: auto -30% -40% auto;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  filter: blur(22px);
  opacity: 0.18;
}

.accent-cyan::after {
  background: var(--accent);
}

.accent-amber::after {
  background: var(--accent-soft);
}

.accent-slate::after {
  background: var(--accent-2);
}

.feature-index {
  margin: 0;
  color: rgba(212, 142, 255, 0.82);
  font-size: 1.8rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

.feature-card h2 {
  margin: 10px 0 8px;
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.feature-card p:last-child {
  margin: 0 auto;
  max-width: 32rem;
  color: var(--muted);
  line-height: 1.85;
}

.site-note {
  width: min(calc(100% - 40px), 920px);
  margin: 32px auto 48px;
  color: rgba(185, 171, 201, 0.88);
  font-size: 0.88rem;
  line-height: 1.85;
  text-align: center;
}

.site-note p {
  margin: 0;
}

.site-note p + p {
  margin-top: 10px;
}

.site-note a {
  color: var(--accent-soft);
  text-decoration: none;
}

.site-note a:hover,
.site-note a:focus-visible {
  text-decoration: underline;
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 980px) {
  .hero,
  .feature-grid,
  .site-note {
    width: min(calc(100% - 28px), var(--max-width));
  }

  .hero {
    padding-top: 34px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    max-width: 760px;
  }
}

@media (max-width: 640px) {
  .topbar {
    gap: 14px;
    flex-direction: column;
    align-items: center;
  }

  .brand {
    font-size: 1.8rem;
  }

  h1 {
    font-size: clamp(3rem, 20vw, 4.4rem);
  }

  .lead {
    max-width: 19em;
    font-size: 1.02rem;
  }

  .button {
    width: 100%;
  }

  .button-compact {
    min-width: 0;
  }

  .cta-cluster {
    flex-direction: column;
  }

  .feature-card {
    border-radius: 22px;
  }

  .feature-card {
    padding-inline: 20px;
  }
}