:root {
  --bg: #ffffff;
  --text: #3f3f3f;
  --soft-text: #555555;
  --muted: #666666;
  --line: rgba(0, 0, 0, 0.08);
  --download: #e84b6a;
  --download-hover: #d93f5f;
  --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.055);
  --button-shadow: 0 14px 30px rgba(232, 75, 106, 0.26);
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.8;
}

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

img {
  display: block;
  width: 100%;
  height: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  width: min(1240px, calc(100% - 28px));
  min-height: 48px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  color: var(--soft-text);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.header-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 6px 13px;
  border-radius: 999px;
  background: #111111;
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
  transition: transform 180ms ease, opacity 180ms ease;
}

.header-download:hover {
  transform: translateY(-1px);
  opacity: 0.9;
}

.lp-container {
  width: min(1240px, calc(100% - 28px));
  margin: 0 auto;
}

.hero-section {
  padding: 18px 0 14px;
}

.image-section {
  padding: 22px 0 26px;
}

.image-frame {
  overflow: hidden;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
}

.image-frame img {
  transform: scale(1.001);
}

.download-area {
  display: flex;
  justify-content: center;
  padding: 20px 0 0;
}

.play-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 26px;
  border-radius: 999px;
  background: var(--download);
  color: #ffffff;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.4;
  box-shadow: var(--button-shadow);
  transition: transform 180ms ease, background 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.play-button:hover {
  transform: translateY(-1px);
  background: var(--download-hover);
  box-shadow: 0 16px 34px rgba(232, 75, 106, 0.32);
}

.notice-section {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
  padding: 34px 0 42px;
}

.notice-text {
  padding: 0;
  border: none;
  background: transparent;
  box-shadow: none;
}

.notice-text p {
  margin: 0;
  color: var(--soft-text);
  font-size: 16px;
  line-height: 2.1;
  letter-spacing: 0.02em;
}

.notice-text p + p {
  margin-top: 2px;
}

.type-line::after,
.type-link.typing::after {
  content: "|";
  display: inline-block;
  margin-left: 2px;
  animation: blink 0.85s steps(1) infinite;
}

.type-line.done::after,
.type-link.done::after {
  content: "";
  animation: none;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #ffffff;
  padding: 24px 0 28px;
}

.footer-inner {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.footer-title {
  margin: 0;
  min-height: 24px;
  color: var(--soft-text);
  font-size: 14px;
  font-weight: 900;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 18px;
  color: var(--soft-text);
  font-size: 13px;
}

.footer-links a {
  min-width: 4em;
}

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms ease, transform 700ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.delay-1 {
  transition-delay: 120ms;
}

.hero-float.is-floating,
.soft-float.is-floating {
  animation: floatImage 5.8s ease-in-out infinite;
}

.soft-float.is-floating {
  animation-duration: 6.6s;
}

@keyframes floatImage {
  0% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-4px);
  }

  100% {
    transform: translateY(0);
  }
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

@media (max-width: 720px) {
  .header-inner {
    width: min(100% - 18px, 1240px);
    min-height: 46px;
  }

  .brand {
    font-size: 14px;
  }

  .header-download {
    min-height: 30px;
    padding: 5px 11px;
    font-size: 11px;
  }

  .lp-container,
  .notice-section,
  .footer-inner {
    width: min(100% - 18px, 1240px);
  }

  .hero-section {
    padding: 12px 0 12px;
  }

  .image-section {
    padding: 16px 0 22px;
  }

  .image-frame {
    border-radius: 8px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.05);
  }

  .download-area {
    padding-top: 16px;
  }

  .play-button {
    width: min(100%, 360px);
    min-height: 46px;
    padding: 11px 20px;
    font-size: 14px;
  }

  .notice-section {
    padding: 26px 0 34px;
  }

  .notice-text p {
    font-size: 14px;
    line-height: 2;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .footer-links {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 12px;
  }
}

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

  .reveal,
  .play-button,
  .header-download {
    transition: none;
  }

  .hero-float.is-floating,
  .soft-float.is-floating {
    animation: none;
  }

  .play-button:hover,
  .header-download:hover {
    transform: none;
  }
}