:root {
  color-scheme: light;
  --bg: #eef2f8;
  --surface: #ffffff;
  --text: #13253a;
  --muted: #55667d;
  --line: #d4dfec;
  --brand: #0a5fb5;
  --brand-hover: #084d93;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Calibri", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% -10%, #d7e8ff 0, transparent 45%),
    radial-gradient(circle at 90% -15%, #ffe4cf 0, transparent 35%),
    var(--bg);
}

.layout {
  max-width: 780px;
  margin: 0 auto;
  padding: 36px 18px 48px;
}

.hero {
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--brand-hover);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.02em;
}

.subtitle {
  margin-top: 14px;
  max-width: 64ch;
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.45;
}

.download-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 12px 30px rgba(12, 35, 59, 0.08);
}

.label {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.version {
  margin: 10px 0 16px;
  font-size: 1.25rem;
  font-weight: 600;
}

.button {
  appearance: none;
  border: none;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.02rem;
  padding: 12px 16px;
  text-decoration: none;
  display: inline-block;
}

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

.button.disabled {
  pointer-events: none;
  background: #9cb1c8;
}

.meta {
  margin-top: 12px;
  color: var(--muted);
}

@media (max-width: 640px) {
  .layout {
    padding: 22px 12px 28px;
  }

  .download-card {
    padding: 18px;
  }
}