:root { color-scheme: dark; font-family: Inter, "Microsoft YaHei", sans-serif; background: #0b1020; color: #eef2ff; }
* { box-sizing: border-box; } body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 20% 0%, #273566, transparent 32rem), #0b1020; }
.shell { width: min(960px, calc(100% - 32px)); margin: 0 auto; padding: 64px 0; }.hero { margin-bottom: 28px; }.eyebrow { letter-spacing: .15em; font-size: 12px; color: #9cb0ff; }.hero h1 { font-size: clamp(36px, 7vw, 64px); margin: 8px 0; }.hero p { color: #b6bfd9; }
.card, .room-bar { background: rgba(22, 30, 58, .83); border: 1px solid #34436f; border-radius: 16px; padding: 22px; box-shadow: 0 20px 55px #0004; }.lobby { max-width: 620px; }.join, .source-row { display: flex; gap: 10px; margin-top: 16px; } input { flex: 1; min-width: 0; background: #0d142a; color: inherit; border: 1px solid #43527d; border-radius: 9px; padding: 12px; font: inherit; }
button, .file-picker { background: #202b4e; color: inherit; border: 1px solid #4b5d90; border-radius: 9px; padding: 11px 14px; font: inherit; cursor: pointer; } button:hover, .file-picker:hover { background: #293861; }.primary { background: #6a72ff; border-color: #8a90ff; font-weight: 700; }.primary:hover { background: #7b82ff; }.hidden { display: none !important; }.room-bar { margin-bottom: 18px; display: flex; justify-content: space-between; align-items: center; gap: 16px; }.label { color: #aeb8d6; display: block; font-size: 12px; }.room-bar strong { font-size: 24px; letter-spacing: .08em; margin-right: 12px; }.link-button { padding: 6px 9px; font-size: 13px; }.badge { background: #4250d7; border-radius: 999px; padding: 5px 9px; font-size: 13px; margin-right: 10px; }.source-panel { margin-bottom: 18px; }.source-panel h2 { margin: 0 0 5px; }.source-panel p { color: #b6bfd9; }.file-picker { display: inline-block; margin-top: 14px; }.file-picker input { display: none; }.video-wrap { position: relative; background: #050811; border: 1px solid #34436f; border-radius: 16px; overflow: hidden; min-height: 340px; display: grid; place-items: center; } video, #bilibiliFrame { display: block; width: 100%; max-height: 70vh; aspect-ratio: 16 / 9; border: 0; }.placeholder { color: #9ca9cc; }.controls { margin-top: 14px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }.controls input { flex: 0 1 180px; }.message { color: #aeb8d6; min-height: 1.2em; } .message.error { color: #ff9b9b; } @media (max-width: 600px) { .shell { padding: 35px 0; }.room-bar, .join, .source-row { align-items: stretch; flex-direction: column; }.video-wrap { min-height: 220px; } }