:root {
  --bg: #0f1222;
  --bg-card: #181c33;
  --bg-card-featured: linear-gradient(135deg, #1d2440, #232a52);
  --text: #f4f5fb;
  --text-secondary: #a8aec9;
  --accent: #5b8cff;
  --accent-strong: #3f6fe8;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.hero {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 20px 36px;
  text-align: center;
}

.section-label {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero-label {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(26px, 5.4vw, 40px);
  font-weight: 800;
  line-height: 1.4;
}

.hero-lead {
  margin: 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.contact-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--accent-strong);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: background 0.15s ease;
}

.contact-button:hover {
  background: var(--accent);
}

.contact-button-hero {
  margin-top: 24px;
}

.apps {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 20px 56px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 18px;
}

.app-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.app-card.featured {
  background: var(--bg-card-featured);
  border-color: rgba(91, 140, 255, 0.35);
  grid-column: 1 / -1;
}

.app-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.app-head img {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  flex-shrink: 0;
}

.app-head h2 {
  margin: 0;
  font-size: 18px;
  font-weight: 800;
}

.app-category {
  margin: 4px 0 0;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
}

.app-desc {
  margin: 0 0 18px;
  font-size: 14px;
  color: var(--text-secondary);
  flex-grow: 1;
}

.store-button {
  display: inline-block;
  align-self: flex-start;
  padding: 11px 22px;
  border-radius: 999px;
  background: var(--accent-strong);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: background 0.15s ease;
}

.store-button:hover {
  background: var(--accent);
}

.contact {
  max-width: 980px;
  margin: 0 auto 32px;
  padding: 28px 20px 42px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.contact h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.35;
}

.contact p:not(.section-label) {
  margin: 12px 0 0;
  max-width: 720px;
  color: var(--text-secondary);
  font-size: 14px;
}

.site-footer {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

.site-footer a {
  color: var(--text-secondary);
}

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

.mobile-contact-bar {
  display: none;
}

@media (max-width: 680px) {
  body {
    padding-bottom: calc(74px + env(safe-area-inset-bottom));
  }

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

  .contact-button,
  .store-button {
    width: 100%;
    text-align: center;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .mobile-contact-bar {
    position: fixed;
    right: 14px;
    bottom: calc(12px + env(safe-area-inset-bottom));
    left: 14px;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    border-radius: 999px;
    background: var(--accent-strong);
    color: #fff;
    font-weight: 800;
    text-decoration: none;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  }
}