:root {
  --bg: #f7f4ff;
  --text: #17151f;
  --muted: #615c70;
  --panel: rgba(255, 255, 255, 0.74);
  --panel-border: rgba(98, 70, 234, 0.18);
  --violet: #6246ea;
  --violet-dark: #4327c7;
  --violet-soft: rgba(98, 70, 234, 0.14);
  --shadow: rgba(43, 30, 82, 0.15);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 50% 0, rgba(178, 132, 255, 0.22), transparent 30rem),
    linear-gradient(180deg, var(--violet-soft), rgba(255, 255, 255, 0) 34rem),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

.page {
  width: min(1040px, calc(100% - 32px));
  margin: 0 auto;
  padding: 64px 0 44px;
}

.intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.app-icon {
  display: block;
  width: 160px;
  height: 160px;
  object-fit: contain;
  filter: drop-shadow(0 18px 30px rgba(43, 30, 82, 0.18));
}

h1 {
  margin: 18px 0 10px;
  font-size: 1.55rem;
  line-height: 1.15;
  font-weight: 750;
}

.description {
  width: min(700px, 100%);
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.28rem);
}

.download-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  color: white;
  background: var(--violet);
  box-shadow: 0 14px 26px rgba(98, 70, 234, 0.26);
  text-decoration: none;
  font-weight: 700;
}

.download-button:hover,
.download-button:focus-visible {
  background: var(--violet-dark);
}

.download-note {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.product-image {
  width: min(860px, 100%);
  margin: 46px auto 0;
}

.product-image img {
  display: block;
  width: 100%;
  min-height: 360px;
  object-fit: cover;
  border: 1px solid rgba(23, 21, 31, 0.08);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(98, 70, 234, 0.10), rgba(255, 255, 255, 0.86)),
    #ffffff;
  box-shadow: 0 18px 42px rgba(43, 30, 82, 0.12);
}

.product-image figcaption {
  margin-top: 10px;
  color: var(--muted);
  text-align: center;
  font-size: 0.9rem;
}

.product-image code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.features {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.feature-panel {
  min-height: 184px;
  padding: 22px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 28px rgba(43, 30, 82, 0.08);
  backdrop-filter: blur(12px);
}

.feature-panel h2 {
  margin: 0 0 10px;
  font-size: 1rem;
  line-height: 1.25;
}

.feature-panel p {
  margin: 0;
  color: var(--muted);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 28px 16px 36px;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer a {
  color: var(--muted);
  text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--violet-dark);
}

@media (max-width: 860px) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 24px, 1040px);
    padding-top: 42px;
  }

  .app-icon {
    width: 128px;
    height: 128px;
  }

  .product-image img {
    min-height: 260px;
  }

  .features {
    grid-template-columns: 1fr;
    margin-top: 36px;
  }

  .feature-panel {
    min-height: 0;
  }
}