:root {
  --bg: #090a12;
  --panel: #14162a;
  --panel-light: #1d2038;
  --text: #f9f7fb;
  --muted: #b5b5c4;
  --pink: #ff1f68;
  --coral: #ff625d;
  --border: rgba(255, 255, 255, 0.1);
  --font: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 31, 104, 0.18), transparent 30rem),
    var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: rgba(9, 10, 18, 0.88);
  backdrop-filter: blur(14px);
}

.site-header__inner,
.container {
  width: min(100% - 2rem, 68rem);
  margin: 0 auto;
}

.site-header__inner {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  width: auto;
  height: 1.75rem;
}

.header-link {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.hero {
  padding: 4.75rem 0 3.5rem;
  text-align: center;
}

.hero__mark {
  width: 5.25rem;
  height: 5.25rem;
  border-radius: 1.5rem;
  box-shadow: 0 1rem 3rem rgba(255, 31, 104, 0.3);
}

.eyebrow {
  margin: 1.5rem 0 0;
  color: #ff83aa;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

h1,
h2 {
  margin: 0;
  line-height: 1.3;
}

h1 {
  margin-top: 0.6rem;
  font-size: clamp(2rem, 9vw, 4.25rem);
  letter-spacing: -0.05em;
}

.hero__lead {
  max-width: 35rem;
  margin: 1.15rem auto 0;
  color: var(--muted);
  font-size: clamp(0.96rem, 3.8vw, 1.1rem);
}

.button {
  display: inline-flex;
  min-height: 3.4rem;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  margin-top: 1.8rem;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pink), var(--coral));
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  box-shadow: 0 0.75rem 1.8rem rgba(255, 31, 104, 0.26);
}

.button:hover,
.button:focus-visible {
  filter: brightness(1.08);
}

.button__arrow {
  font-size: 1.2rem;
  line-height: 1;
}

.notice {
  max-width: 38rem;
  margin: 2.75rem auto 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.85rem;
  color: var(--muted);
  font-size: 0.76rem;
  text-align: left;
}

.section {
  padding: 3.25rem 0;
}

.section--panel {
  background: rgba(255, 255, 255, 0.025);
  border-block: 1px solid var(--border);
}

.section__title {
  font-size: clamp(1.45rem, 6vw, 2rem);
  text-align: center;
}

.section__lead {
  max-width: 35rem;
  margin: 0.65rem auto 0;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

.steps {
  display: grid;
  gap: 0.8rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  min-height: 4.5rem;
  padding: 1rem 1rem 1rem 4.25rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
  counter-increment: step;
}

.steps li::before {
  position: absolute;
  top: 50%;
  left: 1rem;
  width: 2.35rem;
  height: 2.35rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pink), var(--coral));
  content: counter(step);
  font-weight: 800;
  transform: translateY(-50%);
}

.steps strong,
.steps span {
  display: block;
}

.steps span {
  margin-top: 0.1rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.feature-grid {
  display: grid;
  gap: 0.8rem;
  margin-top: 2rem;
}

.feature {
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel-light);
}

.feature h3 {
  margin: 0;
  font-size: 1rem;
}

.feature p {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.cta-panel {
  padding: 2.5rem 1.25rem;
  border-radius: 1.25rem;
  background: linear-gradient(135deg, #34132d, #1b1d38);
  text-align: center;
}

.cta-panel p {
  margin: 0.65rem 0 0;
  color: #d8d3dc;
  font-size: 0.9rem;
}

.site-footer {
  padding: 2rem 0 calc(2rem + env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 0.65rem;
}

.footer-links a {
  text-underline-offset: 0.2em;
}

.legal {
  padding: 3rem 0 4rem;
}

.legal__title {
  font-size: clamp(1.8rem, 7vw, 2.6rem);
}

.legal__intro {
  margin-top: 0.75rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.legal__content {
  margin-top: 2rem;
  padding: 1.25rem;
  border: 1px solid var(--border);
  border-radius: 1rem;
  background: var(--panel);
}

.legal h2 {
  margin-top: 2rem;
  font-size: 1.1rem;
}

.legal h2:first-child {
  margin-top: 0;
}

.legal p,
.legal li {
  color: #dbdbe3;
  font-size: 0.88rem;
}

.legal ul {
  padding-left: 1.25rem;
}

.back-link {
  display: inline-block;
  margin-top: 1.75rem;
  color: #ff94b4;
  font-size: 0.88rem;
  font-weight: 700;
  text-underline-offset: 0.2em;
}

@media (min-width: 42rem) {
  .hero {
    padding-block: 6.5rem 5rem;
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps li {
    padding: 4.5rem 1.1rem 1.1rem;
    text-align: center;
  }

  .steps li::before {
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
  }

  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .legal__content {
    padding: 2rem;
  }
}