:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #172033;
  --muted: #647084;
  --line: #d8e0ec;
  --primary: #1677ff;
  --primary-dark: #0f5fd0;
  --ring: rgba(22, 119, 255, 0.24);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(22, 119, 255, 0.12), transparent 28rem),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
  color: var(--text);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px 18px;
}

.download-panel {
  width: min(100%, 420px);
  display: grid;
  justify-items: center;
  gap: 18px;
  padding: 34px 22px 24px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(23, 32, 51, 0.1);
  text-align: center;
}

.app-icon {
  width: 92px;
  height: 92px;
  border-radius: 8px;
  box-shadow: 0 14px 32px rgba(22, 119, 255, 0.22);
}

.copy {
  display: grid;
  gap: 8px;
}

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.18;
  letter-spacing: 0;
}

.summary,
.hint {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.summary {
  font-size: 16px;
}

.hint {
  font-size: 13px;
}

.download-button {
  width: 100%;
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: #ffffff;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(22, 119, 255, 0.26);
  transition: background-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
  -webkit-tap-highlight-color: transparent;
}

.download-button:hover,
.download-button:focus-visible {
  background: var(--primary-dark);
  box-shadow: 0 14px 28px rgba(22, 119, 255, 0.32);
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

.download-button:active {
  transform: translateY(1px);
}

.download-button svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex: 0 0 auto;
}

@media (max-width: 360px) {
  .download-panel {
    padding-inline: 18px;
  }

  h1 {
    font-size: 26px;
  }
}