:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #080808;
  color: #fff;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; min-height: 100vh; background: radial-gradient(circle at 50% -10%, #403500 0, #141100 24%, #080808 55%); }
button, a { font: inherit; }
.shell { min-height: 100vh; display: flex; flex-direction: column; align-items: center; gap: 18px; padding: 24px; }
.card { position: relative; isolation: isolate; width: min(100%, 540px); overflow: hidden; padding: clamp(28px, 7vw, 48px); text-align: center; background: linear-gradient(145deg, rgba(36,36,36,.98), rgba(13,13,13,.98)); border: 1px solid rgba(255,204,0,.25); border-radius: 32px; box-shadow: 0 28px 80px rgba(0,0,0,.55); }
.glow { position: absolute; z-index: -1; border-radius: 999px; filter: blur(4px); opacity: .15; background: #ffcc00; }
.glow-one { width: 240px; height: 240px; top: -150px; right: -80px; }
.glow-two { width: 160px; height: 160px; bottom: -110px; left: -70px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; color: #050505; background: #ffcc00; box-shadow: 0 8px 20px rgba(255,204,0,.24); }
.invite-icon { display: grid; place-items: center; width: 84px; height: 84px; margin: 38px auto 22px; border-radius: 26px; color: #080808; background: linear-gradient(135deg, #ffe36e, #ffcc00); transform: rotate(-3deg); box-shadow: 0 20px 42px rgba(255,204,0,.22); }
.invite-icon svg { width: 42px; fill: currentColor; }
.eyebrow { margin: 0 0 8px; color: #ffcc00; font-size: 13px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(34px, 9vw, 52px); line-height: 1.04; letter-spacing: -.045em; }
.intro { max-width: 410px; margin: 18px auto 28px; color: #bcbcbc; line-height: 1.65; }
.code-panel { display: grid; grid-template-columns: 1fr auto; gap: 4px 16px; align-items: center; padding: 16px 18px; text-align: left; border: 1px solid #383838; border-radius: 18px; background: rgba(255,255,255,.045); }
.code-panel span { color: #999; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.code-panel strong { color: #ffcc00; font-size: 18px; letter-spacing: .05em; }
.code-panel button { grid-column: 2; grid-row: 1 / 3; padding: 10px 14px; color: #fff; border: 1px solid #484848; border-radius: 12px; background: #292929; cursor: pointer; }
.status { min-height: 22px; margin: 16px 0; color: #aaa; font-size: 14px; }
.actions { display: grid; gap: 12px; }
.button { display: flex; align-items: center; justify-content: center; min-height: 54px; padding: 14px 22px; border-radius: 16px; text-decoration: none; font-weight: 800; transition: transform .16s ease, filter .16s ease; }
.button:hover { transform: translateY(-2px); filter: brightness(1.06); }
.button-primary { color: #050505; background: #ffcc00; box-shadow: 0 14px 30px rgba(255,204,0,.16); }
.button-secondary { color: #fff; border: 1px solid #3d3d3d; background: #252525; }
.invalid h2 { margin: 8px 0; font-size: 24px; }
.invalid p { color: #aaa; line-height: 1.55; }
.privacy { margin: 24px 0 0; color: #757575; font-size: 12px; line-height: 1.55; }
.info-sections { display: grid; gap: 18px; width: min(100%, 720px); text-align: left; }
.info-card { padding: clamp(24px, 5vw, 36px); border: 1px solid rgba(255,204,0,.18); border-radius: 24px; background: linear-gradient(145deg, rgba(30,30,30,.98), rgba(13,13,13,.98)); box-shadow: 0 18px 50px rgba(0,0,0,.3); }
.info-card h2 { margin: 0; font-size: clamp(24px, 5vw, 32px); line-height: 1.15; letter-spacing: -.03em; }
.section-intro { margin: 12px 0 22px; color: #aaa; line-height: 1.6; }
.platform-guides { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.platform-guide { padding: 18px; border: 1px solid #383838; border-radius: 17px; background: rgba(255,255,255,.035); }
.platform-guide h3 { margin: 0 0 10px; color: #ffdf55; font-size: 16px; }
.platform-guide ol { margin: 0; padding-left: 20px; color: #d0d0d0; line-height: 1.55; }
.platform-guide li + li { margin-top: 7px; }
.platform-guide p { margin: 12px 0 0; color: #999; font-size: 13px; line-height: 1.5; }
.faq { padding-bottom: 18px; }
.faq .eyebrow { margin-top: 0; }
.faq details { border-bottom: 1px solid #383838; }
.faq details:first-of-type { margin-top: 16px; border-top: 1px solid #383838; }
.faq summary { position: relative; padding: 17px 28px 17px 0; color: #f2f2f2; font-weight: 750; cursor: pointer; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { position: absolute; top: 15px; right: 2px; color: #ffcc00; content: "+"; font-size: 20px; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: -3px 0 17px; color: #aaa; font-size: 14px; line-height: 1.65; }
.faq summary:focus-visible, .button:focus-visible, .code-panel button:focus-visible { outline: 2px solid #ffcc00; outline-offset: 3px; }
[hidden] { display: none !important; }
@media (max-width: 560px) { .shell { gap: 12px; padding: 12px; } .card { padding: 28px 22px; border-radius: 24px; } .invite-icon { margin-top: 28px; } .platform-guides { grid-template-columns: 1fr; } .info-card { border-radius: 20px; } }
@media (prefers-reduced-motion: reduce) { .button { transition: none; } }