:root {
  color-scheme: dark;
  --bg: #0c090d;
  --bg-soft: #171119;
  --card: #1e1620;
  --line: #352531;
  --text: #f5edf3;
  --sub: #beaebe;
  --accent: #d84a62;
  --accent-strong: #f14557;
  --button-text: #fff8fa;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 20% -10%, #2f1220 0%, var(--bg) 55%);
  color: var(--text);
  font-family: "Hiragino Sans", "Noto Sans JP", "Yu Gothic", system-ui, -apple-system, sans-serif;
  line-height: 1.7;
}

img {
  display: block;
  width: 100%;
  max-width: 100%;
}

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

p {
  margin: 0;
}

.hero,
.section,
.footer {
  width: min(100% - 24px, 960px);
  margin-inline: auto;
}

.hero {
  position: relative;
  overflow: hidden;
  margin-top: 14px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: linear-gradient(165deg, rgba(216, 74, 98, 0.12), rgba(25, 18, 27, 0.92));
  box-shadow: var(--shadow);
  isolation: isolate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
  pointer-events: none;
  animation: pulse-darkness 7s ease-in-out infinite;
  z-index: -1;
}

.hero__eyebrow {
  margin-bottom: 10px;
  color: #f39aaa;
  font-size: 0.83rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

h1 {
  font-size: clamp(1.75rem, 6.3vw, 2.9rem);
}

h1 span {
  display: block;
  color: var(--sub);
  font-size: 0.64em;
  margin-top: 4px;
}

.hero__catch {
  margin-top: 14px;
  font-size: clamp(1.02rem, 4vw, 1.3rem);
  color: #ffe4ea;
  font-weight: 700;
}

.hero__lead {
  margin-top: 10px;
  color: var(--sub);
}

.hero__cta {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.hero__image {
  margin-top: 18px;
  border-radius: 16px;
  border: 1px solid #483542;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  padding: 12px 14px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.button--store {
  background: linear-gradient(180deg, var(--accent-strong), #bc334d);
  color: var(--button-text);
  box-shadow: 0 8px 16px rgba(216, 74, 98, 0.25);
}

.button--store:hover,
.button--store:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 12px 20px rgba(216, 74, 98, 0.34);
  background: linear-gradient(180deg, #ff5b73, #cd3854);
}

.section {
  margin-top: 14px;
  padding: 20px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #1f1822 0%, #171117 100%);
}

h2 {
  margin-bottom: 10px;
  font-size: clamp(1.35rem, 4.8vw, 1.95rem);
}

.section p {
  color: var(--sub);
}

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

.feature-cards {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.feature-card {
  padding: 14px 12px;
  border-radius: 14px;
  border: 1px solid #4a3441;
  background: linear-gradient(180deg, rgba(216, 74, 98, 0.14), rgba(31, 24, 34, 0.9));
  font-weight: 700;
}

code {
  font-family: "SFMono-Regular", "Consolas", "Menlo", monospace;
  color: #ffc1cc;
}

.screenshot-gallery {
  margin-top: 14px;
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 6px;
  scroll-snap-type: x mandatory;
}

.screenshot-gallery img {
  flex: 0 0 min(70vw, 250px);
  border-radius: 16px;
  border: 1px solid #4f3945;
  background: #140f15;
  scroll-snap-align: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.screenshot-gallery img:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.35);
}

.howto-list {
  margin: 0;
  padding-left: 1.2rem;
  color: var(--sub);
}

.howto-list li + li {
  margin-top: 6px;
}

.section--download p,
.section--privacy p {
  margin-bottom: 12px;
}

.download-buttons {
  display: grid;
  gap: 10px;
}

.privacy-link {
  color: #ff8c9f;
  font-weight: 700;
  text-decoration: none;
}

.privacy-link:hover,
.privacy-link:focus-visible {
  text-decoration: underline;
}

.footer {
  margin-block: 16px 24px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #150f16;
  text-align: center;
}

.footer nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin-bottom: 8px;
}

.footer a {
  color: #ff9aac;
  text-decoration: none;
  font-weight: 700;
}

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

.footer p {
  color: var(--sub);
  font-size: 0.92rem;
}

@keyframes pulse-darkness {
  0%,
  100% {
    opacity: 0.22;
  }
  50% {
    opacity: 0.42;
  }
}

@media (min-width: 760px) {
  .hero {
    display: grid;
    grid-template-columns: 1.18fr 1fr;
    gap: 18px;
    align-items: center;
  }

  .hero__image {
    margin-top: 0;
    height: 100%;
  }

  .hero__cta,
  .download-buttons {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}