:root {
  --teal: #0F766E;
  --teal-dark: #115e56;
  --ink: #0f172a;
  --muted: #64748b;
  --bg: #f1f5f9;
  --card: #ffffff;
  --border: #e2e8f0;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-icon { width: 32px; height: 32px; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-weight: 700; font-size: 18px; }
.brand-sub { font-size: 12px; font-weight: 600; color: var(--muted); }
.platform-pill {
  font-size: 12px;
  font-weight: 600;
  color: var(--teal);
  background: #ccfbf1;
  padding: 4px 10px;
  border-radius: 999px;
}

main { max-width: 880px; margin: 0 auto; padding: 0 20px; }

/* Hero */
.hero { text-align: center; padding: 56px 0 40px; }
.hero-icon {
  width: 96px; height: 96px; border-radius: 22px;
  box-shadow: 0 12px 30px rgba(15, 118, 110, 0.25);
  margin-bottom: 22px;
}
.hero h1 { font-size: 38px; letter-spacing: -0.02em; margin-bottom: 14px; }
.tagline { font-size: 18px; color: var(--muted); max-width: 540px; margin: 0 auto 30px; }
.tagline strong { color: var(--ink); }

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--teal);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  padding: 15px 30px;
  border-radius: 14px;
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.3);
  transition: transform 0.12s ease, background 0.12s ease;
}
.download-btn:hover { background: var(--teal-dark); transform: translateY(-1px); }
.download-btn:active { transform: translateY(0); }
.download-btn.disabled { background: #94a3b8; box-shadow: none; cursor: not-allowed; pointer-events: auto; }

.release-meta { margin-top: 14px; font-size: 14px; color: var(--muted); }
.web-alt { margin-top: 10px; font-size: 14px; color: var(--muted); }
.web-alt a { color: var(--teal); font-weight: 600; text-decoration: none; }
.web-alt a:hover { text-decoration: underline; }

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 20px 0 48px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  text-align: center;
}
.card-emoji { font-size: 30px; margin-bottom: 10px; }
.card h3 { font-size: 17px; margin-bottom: 6px; }
.card p { font-size: 14px; color: var(--muted); }

/* Install */
.install {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px;
  margin-bottom: 48px;
}
.install h2 { font-size: 24px; margin-bottom: 18px; }
.steps { padding-left: 22px; display: grid; gap: 12px; }
.steps li { font-size: 15px; }
.steps code {
  background: #f1f5f9;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 13px;
}
.note { margin-top: 18px; font-size: 13px; color: var(--muted); }

/* Footer */
.site-footer {
  text-align: center;
  padding: 28px 20px;
  color: var(--muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
}

@media (max-width: 640px) {
  .hero h1 { font-size: 30px; }
  .features { grid-template-columns: 1fr; }
  .install { padding: 24px; }
}