:root {
  color-scheme: dark;
  --bg: #100b23;
  --bg-2: #142841;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.14);
  --line: rgba(255, 255, 255, 0.16);
  --text: #fbf7ff;
  --muted: #b8b5cc;
  --primary: #8b5cf6;
  --accent: #22d3ee;
  --pink: #ec4899;
  --green: #4ade80;
  --max: 1080px;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 18%, rgba(236, 72, 153, 0.22), transparent 28rem),
    radial-gradient(circle at 86% 12%, rgba(34, 211, 238, 0.18), transparent 30rem),
    linear-gradient(135deg, var(--bg), #171032 45%, var(--bg-2));
  color: var(--text);
  line-height: 1.75;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(16, 11, 35, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 800;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 12px 28px rgba(139, 92, 246, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text);
}

.hero,
.section,
.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
  padding: 64px 0;
}

.eyebrow {
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0;
  margin: 0 0 14px;
}

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

h1 {
  font-size: 56px;
  line-height: 1.12;
  letter-spacing: 0;
  margin-bottom: 22px;
}

h2 {
  font-size: 34px;
  line-height: 1.28;
  margin-bottom: 14px;
}

h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.lead {
  color: #ded8f4;
  font-size: 18px;
  max-width: 640px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 800;
  background: var(--surface);
}

.button.primary {
  border: 0;
  background: linear-gradient(135deg, var(--primary), var(--pink));
  box-shadow: 0 18px 36px rgba(139, 92, 246, 0.28);
}

.phone-wrap {
  display: flex;
  justify-content: center;
}

.phone {
  width: min(360px, 78vw);
  aspect-ratio: 390 / 844;
  border: 10px solid #08080f;
  border-radius: 44px;
  padding: 18px;
  background:
    radial-gradient(circle at 18% 24%, rgba(34, 211, 238, 0.72), transparent 4.8rem),
    radial-gradient(circle at 82% 32%, rgba(236, 72, 153, 0.78), transparent 5.2rem),
    linear-gradient(160deg, #261654, #0c2338);
  box-shadow: 0 36px 80px rgba(0, 0, 0, 0.45);
}

.island {
  width: 110px;
  height: 30px;
  margin: 0 auto 20px;
  border-radius: 999px;
  background: #05050a;
}

.app-card {
  padding: 20px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  color: #2a2143;
}

.app-card + .app-card {
  margin-top: 14px;
}

.mood {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mood-face {
  width: 72px;
  height: 72px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #8b5cf6;
  color: #24163d;
  font-size: 34px;
}

.progress {
  height: 10px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(42, 33, 67, 0.12);
  margin-top: 18px;
}

.progress span {
  display: block;
  width: 82%;
  height: 100%;
  background: var(--accent);
}

.section {
  padding: 72px 0;
}

.section-header {
  max-width: 720px;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  min-height: 178px;
  padding: 22px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.card .icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.65), rgba(34, 211, 238, 0.5));
  margin-bottom: 14px;
}

.muted {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  align-items: start;
}

.panel {
  padding: 28px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.075);
}

.list {
  padding-left: 1.2em;
  margin: 0;
  color: #ddd8f2;
}

.list li + li {
  margin-top: 8px;
}

.page {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 84px;
}

.page h1 {
  font-size: 42px;
}

.doc-section {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.doc-section:last-child {
  border-bottom: 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(7, 6, 16, 0.34);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 820px) {
  .nav {
    min-height: 64px;
  }

  .nav-links {
    gap: 12px;
    font-size: 12px;
  }

  .hero {
    min-height: 0;
    grid-template-columns: 1fr;
    padding: 48px 0 64px;
    gap: 36px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 28px;
  }

  .grid,
  .split {
    grid-template-columns: 1fr;
  }

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