:root { color-scheme: dark; font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #fff; background: #101318; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100svh; display: flex; flex-direction: column; background: radial-gradient(ellipse at 50% 40%, #26352c 0, #161e20 45%, #101318 85%); }
.urgency-banner { margin: 0; padding: 17px 20px; background: #e51920; text-align: center; font-size: 14px; font-weight: 800; line-height: 1.5; letter-spacing: .05em; }
main { flex: 1; display: grid; place-items: center; padding: 40px 20px; }
.promo-content { width: min(100%, 500px); text-align: center; }
h1 { margin: 0; font-size: clamp(19px, 4.6vw, 25px); line-height: 1.4; font-weight: 800; }
h1 span { color: #f7d778; }
.intro { margin: 14px 0 24px; color: #d4ddd7; font-size: 14px; line-height: 1.6; }
.group-image { display: block; width: clamp(164px, 25vh, 238px); height: auto; aspect-ratio: 1; object-fit: cover; margin: 0 auto 26px; border: 3px solid #f7d778; border-radius: 18px; box-shadow: 0 16px 45px #0005; }
.join-button { display: flex; align-items: center; justify-content: center; gap: 10px; width: 100%; min-height: 64px; padding: 18px 20px; border: 0; border-radius: 999px; background: #22d65f; color: #082512; font: inherit; font-size: 18px; font-weight: 800; cursor: pointer; box-shadow: 0 8px 35px #22d65f30; transition: background .15s, transform .15s; }
.join-button:hover { background: #48e47d; transform: translateY(-2px); }
.join-button:focus-visible { outline: 3px solid #fff; outline-offset: 5px; }
.join-button:disabled { cursor: wait; opacity: .7; transform: none; }
.join-button svg { flex-shrink: 0; }
.member-count { margin: 22px 0 0; font-size: 14px; line-height: 1.5; font-weight: 700; }
.reassurance { margin: 16px 0 0; font-size: 12px; color: #b8c5be; line-height: 1.5; }
.status-message { margin: 14px 0 0; font-size: 13px; line-height: 1.5; }
.status-message:empty { display: none; }
.status-message.error { color: #ffb5b5; }
footer { padding: 18px 20px calc(18px + env(safe-area-inset-bottom)); text-align: center; background: #090c10; color: #a7b1ad; font-size: 11px; letter-spacing: .04em; }
@media (max-width: 520px) { .urgency-banner { padding: 13px 14px; font-size: 11px; } main { padding: 28px 22px; } .intro { margin: 12px 0 20px; } .group-image { margin-bottom: 22px; } .join-button { min-height: 58px; font-size: 16px; } }
@media (prefers-reduced-motion: reduce) { .join-button { transition: none; } }