:root { color-scheme: light; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: #17212b; background: #f3f5f7; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; }
.shell { width: min(100% - 32px, 520px); margin: 48px auto; }
.panel { background: #fff; border: 1px solid #d9dee5; border-radius: 8px; padding: 28px; box-shadow: 0 12px 32px rgba(23, 33, 43, .08); }
.eyebrow { margin: 0 0 8px; color: #1677ff; font-size: 12px; font-weight: 700; letter-spacing: .08em; }
h1 { margin: 0 0 8px; font-size: 28px; }
.muted { color: #667085; line-height: 1.6; }
.channels { display: grid; gap: 12px; margin-top: 24px; }
.channel { border: 1px solid #b8c2cc; border-radius: 6px; background: #fff; color: #17212b; cursor: pointer; font-size: 16px; padding: 14px 16px; text-align: left; }
.channel:hover:not(:disabled), .channel:focus-visible { border-color: #1677ff; outline: 3px solid rgba(22, 119, 255, .18); }
.channel:disabled { cursor: not-allowed; opacity: .5; }
.qr-panel { margin-top: 24px; text-align: center; }
#qr { display: block; width: min(100%, 320px); aspect-ratio: 1; margin: 0 auto; object-fit: contain; }
.state { color: #0a7d3f; min-height: 24px; }
.error { color: #b42318; margin-top: 20px; }
@media (max-width: 480px) { .shell { margin: 16px auto; } .panel { padding: 20px; } h1 { font-size: 24px; } }