* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --surface0: #0d0e11;
  --surface1: #141519;
  --accent: #6f93bf;
  --accent-hover: #84a4cc;
  --accent-soft: #a8c0dd;
  --accent-wash: rgba(111, 147, 191, 0.16);
  --text: #f2f3f5;
  --text-muted: #9a9ea6;
  --text-faint: #6c6f76;
}

html,
body {
  height: 100%;
}

body {
  background: var(--surface0);
  color: var(--text);
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow-x: hidden;
  padding: 24px;
}

.glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle at 50% 32%, var(--accent-wash), transparent 60%);
}

main {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 480px;
}

.logo {
  width: 88px;
  height: 88px;
  object-fit: contain;
  margin-bottom: 20px;
  filter: drop-shadow(0 8px 24px var(--accent-wash));
}

h1 {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.tagline {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 40px;
}

.download {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.btn-primary {
  appearance: none;
  border: none;
  cursor: pointer;
  background: var(--accent);
  color: var(--surface0);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 10px;
  transition:
    background-color 0.15s ease,
    transform 0.1s ease;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
}

.other-platforms {
  display: flex;
  gap: 16px;
  font-size: 0.9rem;
}

.other-platforms a {
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.other-platforms a:hover {
  color: var(--accent-soft);
  border-color: var(--accent-soft);
}

.version-line {
  margin-top: 28px;
  color: var(--text-faint);
  font-size: 0.85rem;
}

footer {
  position: fixed;
  bottom: 16px;
  color: var(--text-faint);
  font-size: 0.78rem;
  z-index: 1;
}