:root{color-scheme:dark;font-family:Inter,"Segoe UI",system-ui,sans-serif;background:#111317;color:#f3f4f6;font-synthesis:none}
*{box-sizing:border-box}
body{margin:0;min-height:100svh;display:grid;place-items:center;padding:28px 20px}
main{width:min(420px,100%);text-align:center}
.app-icon{display:grid;place-items:center;margin:0 auto 24px;width:68px;height:68px;border-radius:18px;border:1px solid #343940;background:#20252a;color:#70e1c3;font-size:25px;font-weight:700;letter-spacing:-1px}
h1{margin:0;font-size:48px;font-weight:650;line-height:1.15;letter-spacing:-1.8px}
.subtitle{margin:12px 0 32px;font-size:16px;color:#a7adb8}
button{width:100%;display:flex;align-items:center;justify-content:center;gap:11px;border:1px solid transparent;border-radius:10px;background:#70e1c3;color:#102b23;padding:16px 20px;font-family:inherit;font-size:16px;font-weight:650;line-height:1.4;cursor:pointer;transition:background .15s}
button:hover{background:#96ecd5}button:disabled{cursor:progress;background:#4c9a85;color:#071c15}button:focus-visible{outline:2px solid #f3f4f6;outline-offset:4px}
.platform{margin:12px 0 0;color:#a7adb8;font-size:13px}
#status{margin:16px 0 0;min-height:38px;color:#a7adb8;font-size:13px;line-height:1.5}
progress{width:100%;height:5px;margin-top:20px;border:0;border-radius:5px;overflow:hidden;accent-color:#70e1c3;background:#2c3239}
progress::-webkit-progress-bar{background:#2c3239}progress::-webkit-progress-value{background:#70e1c3}progress::-moz-progress-bar{background:#70e1c3}
[hidden]{display:none!important}
.instructions{border-top:1px solid #2a2e35;margin-top:22px;padding-top:18px;font-size:14px;line-height:1.6;color:#a7adb8}
.instructions p{margin:0 0 12px}.instructions p:last-child{margin-bottom:0}.instructions strong{color:#e2e5e9;font-weight:600}
@media(max-width:480px){h1{font-size:42px}.app-icon{margin-bottom:20px}.subtitle{margin-bottom:26px}}