:root{--bg: #eeeef3;--surface: #ffffff;--border: #c0c5ce;--text: #111827;--dim: #4b5563;--primary: #4f46e5;--primary-hover: #4338ca;--green: #10b981;--red: #ef4444;--red-light: #fef2f2;--yellow: #f59e0b;--sans: "DM Sans", system-ui, sans-serif;--mono: ui-monospace, "SF Mono", "Menlo", monospace;--radius: 12px;--shadow: 0 1px 3px rgba(0, 0, 0, .06)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--sans);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.5;-webkit-font-smoothing:antialiased}.app{max-width:720px;margin:0 auto;padding:24px 20px}header{display:flex;align-items:center;gap:10px;padding:0 0 24px;margin-bottom:24px;border-bottom:1px solid var(--border)}.logo{width:36px;height:36px;border-radius:10px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}h1{font-size:18px;font-weight:600;letter-spacing:-.3px}.subtitle{font-size:13px;color:var(--dim);margin-top:1px}.subtitle a{color:var(--primary);text-decoration:none;font-weight:500}.subtitle a:hover{text-decoration:underline}.videos{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:20px}.video-box{position:relative;border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);overflow:hidden;aspect-ratio:16 / 10}.video-box video{width:100%;height:100%;object-fit:cover;display:block;background:#d1d5db}.fullscreen-btn{position:absolute;top:10px;left:10px;z-index:2;width:32px;height:32px;border:none;border-radius:6px;background:#ffffffe6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--dim);cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .15s}.video-box:hover .fullscreen-btn{opacity:1}.fullscreen-btn:hover{color:var(--text)}.mute-tag{position:absolute;top:10px;right:10px;z-index:2;font-size:11px;font-weight:500;background:#ffffffe6;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:var(--red);padding:4px 10px;border-radius:6px;display:flex;align-items:center;gap:4px}.placeholder{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#6b7280;font-size:13px;font-weight:500;gap:8px;background:#dfe2e8}.placeholder svg{opacity:.55}.controls{display:flex;gap:10px;justify-content:center;margin-bottom:24px}.btn{font-family:var(--sans);font-size:14px;font-weight:500;padding:10px 22px;border-radius:9999px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:all .15s;display:flex;align-items:center;gap:8px;box-shadow:var(--shadow)}.btn:hover{background:#e5e7eb;border-color:#d1d5db}.btn:disabled{opacity:.4;cursor:not-allowed}.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}.btn.primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}.btn.primary:disabled{background:#a5b4fc;border-color:#a5b4fc}.btn.active{background:#eef2ff;color:var(--primary);border-color:#c7d2fe}.btn.danger{background:var(--red-light);color:var(--red);border-color:#fecaca}.btn.danger:hover{background:#fee2e2}.panel{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:var(--radius);padding:24px;margin-bottom:20px;text-align:center}.panel h3{font-size:18px;font-weight:600;margin-bottom:6px}.panel .hint{font-size:14px;color:var(--dim);margin-bottom:16px;line-height:1.5}.panel .hint a{color:var(--primary);text-decoration:none;font-weight:500}.panel .hint a:hover{text-decoration:underline}.panel .hint code{font-family:var(--mono);font-size:11px;background:#e5e7eb;padding:2px 8px;border-radius:4px;color:var(--text);word-break:break-all}.input{width:100%;max-width:400px;padding:12px 16px;background:var(--bg);border:1px solid var(--border);border-radius:9999px;font-family:var(--sans);font-size:14px;color:var(--text);outline:none;transition:border-color .15s,box-shadow .15s}.input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.input::placeholder{color:#6b7280}.btn-copy{background:var(--surface);border:1px solid var(--border);border-radius:6px;cursor:pointer;padding:4px 8px;font-size:12px;vertical-align:middle;transition:all .15s;color:var(--dim)}.btn-copy:hover{border-color:var(--primary);color:var(--primary)}.log-box{background:var(--surface);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:var(--radius);overflow:hidden}.log-header{padding:12px 18px;border-bottom:1px solid var(--border);font-size:13px;font-weight:600;color:var(--dim);display:flex;align-items:center;gap:8px}.log-content{padding:8px 18px;max-height:200px;overflow-y:auto;font-size:13px;line-height:1.6}.log-content::-webkit-scrollbar{width:4px}.log-content::-webkit-scrollbar-track{background:transparent}.log-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.log-entry{display:flex;align-items:baseline;gap:10px;padding:4px 0}.log-entry+.log-entry{border-top:1px solid #e5e7eb}.log-time{color:#6b7280;font-size:12px;flex-shrink:0}.log-msg{color:var(--text)}.log-msg.ok{color:var(--green)}.log-msg.warn{color:var(--yellow)}.log-msg.err{color:var(--red)}.chat-box{margin-bottom:20px}.chat-msg{display:flex;align-items:baseline;gap:8px;padding:4px 0}.chat-msg+.chat-msg{border-top:1px solid #e5e7eb}.chat-sender{font-weight:600;font-size:12px;flex-shrink:0}.chat-msg.you .chat-sender{color:var(--primary)}.chat-msg.peer .chat-sender{color:var(--green)}.chat-text{color:var(--text);word-break:break-word;min-width:0}.chat-text p{margin:0}.chat-text code{font-family:var(--mono);font-size:12px;background:#e5e7eb;padding:1px 5px;border-radius:3px}.chat-text pre{margin:4px 0;padding:8px;background:#e5e7eb;border-radius:6px;overflow-x:auto;font-size:12px}.chat-text pre code{background:none;padding:0}.chat-input{display:flex;gap:8px;padding:10px 14px;border-top:1px solid var(--border)}.chat-input .input{flex:1;max-width:none;padding:8px 14px;border-radius:8px}.chat-input .btn{padding:8px 16px;border-radius:8px}.build-info{text-align:center;font-size:11px;color:var(--dim);margin-top:20px;opacity:.5}@media(max-width:640px){.videos{grid-template-columns:1fr}}