body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: #111827;
  background: radial-gradient(1200px 600px at 10% -10%, #dbeafe55, transparent 60%),
              radial-gradient(1000px 500px at 110% 10%, #fde68a55, transparent 60%),
              #0f172a;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* { box-sizing: border-box; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; }
.logo { height: 32px; width: auto; filter: drop-shadow(0 2px 4px rgba(0,0,0,.3)); }
.app-name { color: #e5e7eb; font-weight: 600; letter-spacing: .3px; }

main { max-width: 960px; margin: 0 auto; padding: 24px 20px 48px; }

.hero { text-align: center; margin: 28px 0 18px; }
.headline { color: #fafafa; font-size: clamp(26px, 4vw, 40px); margin: 0 0 10px; letter-spacing: .2px; animation: fadeUp .8s ease-out both; }
.subhead { color: #cbd5e1; font-size: clamp(15px, 2.5vw, 18px); margin: 0 auto; max-width: 720px; line-height: 1.55; animation: fadeUp .8s .1s ease-out both; }

.qr-and-link { display: grid; place-items: center; gap: 12px; margin: 26px 0 22px; }
.qr { width: min(220px, 60vw); height: auto; border-radius: 12px; background: #0b1220; padding: 14px; box-shadow: 0 10px 30px rgba(0,0,0,.35), inset 0 0 0 1px rgba(255,255,255,.06); animation: popIn .5s ease-out both; }
.primary-link { color: #111827; background: linear-gradient(135deg,#a7f3d0,#93c5fd); padding: 10px 16px; border-radius: 999px; text-decoration: none; font-weight: 700; letter-spacing: .2px; box-shadow: 0 8px 20px rgba(99,102,241,.25); transition: transform .2s ease, box-shadow .2s ease, filter .2s ease; }
.primary-link:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(99,102,241,.35); filter: brightness(1.05); }

.cal-embed { background: rgba(2,6,23,.6); border: 1px solid rgba(255,255,255,.06); border-radius: 16px; padding: 8px; box-shadow: 0 10px 30px rgba(0,0,0,.35); overflow: hidden; animation: fadeIn .6s ease-out both; }
.cal-embed > div { min-height: 520px; }

.cta-image { text-align: center; margin: 28px 0 8px; }
.promo-img { width: 100%; max-width: 920px; height: auto; border-radius: 16px; box-shadow: 0 12px 40px rgba(0,0,0,.45); transition: transform .25s ease, box-shadow .25s ease, filter .25s ease; }
.promo-img:hover { transform: translateY(-4px) scale(1.01); box-shadow: 0 16px 50px rgba(0,0,0,.55); filter: saturate(1.05); }

.site-footer { text-align: center; color: #9ca3af; padding: 28px 20px 40px; font-size: 14px; }
.site-footer a { color: #e5e7eb; text-decoration: none; border-bottom: 1px dashed rgba(229,231,235,.35); }
.site-footer a:hover { color: #fff; border-bottom-color: rgba(255,255,255,.6); }

@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { 0% { opacity: 0; transform: scale(.96); } 60% { opacity: 1; transform: scale(1.02); } 100% { transform: scale(1); } }

@media (max-width: 640px) {
  .site-header { padding: 12px 14px; }
  .logo { height: 28px; }
  main { padding: 18px 14px 36px; }
  .qr { padding: 12px; border-radius: 10px; }
  .cal-embed > div { min-height: 560px; }
}

@media (min-width: 1024px) {
  .promo-img { width: 50%; max-width: none; }
}