:root{
    --teams-purple:#464EB8; --teams-purple-hover:#5B5FC7; --teams-bg:#F3F2F1;
    --teams-border:#E1DFDD; --text:#323130; --text2:#605E5C; --ok:#107C10; --warn:#D13438;
    --tile:#000; --shadow:0 6px 20px rgba(0,0,0,.16), 0 2px 6px rgba(0,0,0,.10);
  }
  *{box-sizing:border-box} 
  html,body{height:100%;margin:0;background:var(--teams-bg);color:var(--text);font:14px/1.4 "Segoe UI",system-ui,Roboto,Arial,sans-serif}

  .pre-join{padding:0 20px;display:flex;flex-direction:column;align-items:center}
  .wrap{width:min(720px,100%);max-width:720px;margin:0 auto;padding:60px 0 120px}
  .header{height:48px;position:fixed;left:0;right:0;top:0;background:#fff;border-bottom:1px solid var(--teams-border);display:flex;align-items:center;gap:8px;padding:0 16px;z-index:100}
  .hx{width:18px;height:18px;background:var(--teams-purple);border-radius:3px;display:flex;align-items:center;justify-content:center}
  .hx svg{width:12px;height:12px;fill:#fff}

  .banner{margin-top:20px;background:#fff;border:1px solid var(--teams-border);border-radius:10px;display:flex;justify-content:space-between;gap:12px;padding:10px 14px;box-shadow:var(--shadow)}
  .btitle{font-weight:700}
  .bmeta{font-size:12px;color:var(--text2)}
  .pills{display:flex;gap:8px;flex-wrap:wrap}
  .pill{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--teams-border);background:#f7f7f7;border-radius:999px;padding:4px 8px;font-size:11px;color:var(--text2);line-height:1;}
  .pill svg{width:14px;height:14px;fill:currentColor;display:block;vertical-align:middle}

  .error-box{margin-top:20px;background:#fff;border:1px solid var(--teams-border);border-radius:10px;padding:40px;box-shadow:var(--shadow);text-align:center}
  .error-icon{width:64px;height:64px;margin:0 auto 20px;background:#fdeded;border-radius:50%;display:flex;align-items:center;justify-content:center}
  .error-icon svg{width:32px;height:32px;fill:#a4262c}
  .error-title{font-size:20px;font-weight:600;color:var(--text);margin-bottom:8px}
  .error-text{color:var(--text2);line-height:1.5}

  .card{margin-top:12px;background:#fff;border-radius:10px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--teams-border)}
  .card-h{padding:18px 20px 10px;border-bottom:1px solid var(--teams-border)}
  .card-h h1{margin:0 0 4px;font-size:18px}
  .card-h p{margin:0;color:var(--text2)}
  .card-b{padding:18px 20px}

  .row{display:grid;grid-template-columns:1fr 160px;gap:8px;align-items:center;margin-bottom:12px}
  .label{font-weight:600}
  .input{width:100%;padding:8px 10px;border:1px solid var(--teams-border);border-radius:6px;font-size:14px;background:#fff}
  .input:focus{outline:none;box-shadow:0 0 0 1px var(--teams-purple);border-color:var(--teams-purple)}
  .input.error{border-color:var(--warn)}
  .hint{font-size:12px;color:#8a8886;margin-top:4px;display:none}
  .hint.show{display:block}
  .hint.error{color:var(--warn)}
  .status{display:flex;align-items:center;gap:6px;justify-self:end}
  .s-ico{width:16px;height:16px;display:block}
  .ok{color:var(--ok)} .bad{color:var(--warn)} .muted{color:#8a8886}

  .preview{background:#F6F7F8;border-radius:12px;padding:12px;margin-top:10px}
  .tile{position:relative;width:100%;aspect-ratio:16/9;background:var(--tile);border-radius:12px;overflow:hidden;box-shadow:0 12px 30px rgba(0,0,0,.28)}
  .tile::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,.25) 100%);pointer-events:none}
  .vid{display:none;width:100%;height:100%;object-fit:cover}
  .off{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#A1A1A1;gap:8px}
  .off svg{width:34px;height:34px;fill:#A1A1A1}
  .vctrl{position:absolute;left:10px;bottom:10px;display:flex;gap:8px}
  .btnc{width:36px;height:36px;border-radius:50%;border:none;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;cursor:pointer}
  .btnc svg{width:16px;height:16px;fill:#fff}
  .btnc.muted{background:#7a1f21}

  .actions{display:flex;justify-content:flex-end;gap:8px;margin-top:14px}
  .btn{border:1px solid var(--teams-purple);background:#fff;color:var(--teams-purple);padding:8px 14px;border-radius:6px;font-weight:600;cursor:pointer}
  .btnp{background:var(--teams-purple);color:#fff;border:none}
  .btnp:disabled{background:#A19F9D;cursor:not-allowed}

  .info-bar{background:#e3f2fd;border:1px solid #90caf9;border-radius:6px;padding:10px 12px;margin-bottom:16px;position:relative}
  .info-bar.error{background:#fdeded;border-color:#f1aeb5}
  .info-content{display:flex;align-items:center;gap:8px;font-size:13px;color:#1565c0}
  .info-bar.error .info-content{color:#a4262c}
  .info-close{position:absolute;right:8px;top:50%;transform:translateY(-50%);background:none;border:none;font-size:18px;color:#757575;cursor:pointer;padding:4px}
  .info-close:hover{color:#323130}

  .device-info{display:flex;flex-direction:column;gap:8px;margin-bottom:20px;padding:12px;background:#f8f9fa;border-radius:6px;border:1px solid var(--teams-border)}
  .device-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text2)}

  .help-section{margin-top:16px;border-top:1px solid var(--teams-border);padding-top:16px}
  .help-details{border:none}
  .help-toggle{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:13px;color:var(--text2);font-weight:600;padding:8px 0;list-style:none}
  .help-toggle::-webkit-details-marker{display:none}
  .help-toggle:hover{color:var(--teams-purple)}
  .help-content{margin-top:12px;padding:16px;background:#f8f9fa;border-radius:6px;border:1px solid var(--teams-border)}
  .help-item{margin-bottom:12px}
  .help-item:last-of-type{margin-bottom:16px}
  .help-item strong{display:block;font-size:13px;color:var(--text);margin-bottom:2px}
  .help-item p{margin:0;font-size:12px;color:var(--text2);line-height:1.3}
  .help-link{color:var(--teams-purple);font-size:13px;font-weight:600;text-decoration:none}
  .help-link:hover{text-decoration:underline}

  .footer{position:fixed;bottom:0;left:0;right:0;padding:16px 0;border-top:1px solid var(--teams-border);text-align:center;background:#fff;z-index:100}
  .footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:16px;margin-bottom:8px}
  .footer-link{color:var(--text2);font-size:12px;text-decoration:none}
  .footer-link:hover{color:var(--teams-purple);text-decoration:underline}
  .footer-copy{color:var(--text2);font-size:11px}

  .waiting{position:fixed;inset:0;background:var(--teams-bg);display:none;align-items:center;justify-content:center;opacity:0;transition:opacity 0.3s ease;z-index:200}
  .waiting.show{opacity:1}
  .w-card{width:min(420px,90vw);background:#fff;border-radius:8px;box-shadow:var(--shadow);border:1px solid var(--teams-border);overflow:hidden;transform:scale(0.9);transition:transform 0.3s ease}
  .waiting.show .w-card{transform:scale(1)}
  .w-head{display:flex;align-items:center;gap:12px;padding:20px 24px;border-bottom:1px solid var(--teams-border);background:#f8f9fa}
  .w-left{display:flex;align-items:center;gap:10px}
  .spinner{width:20px;height:20px;border:2px solid #e1dfdd;border-top-color:var(--teams-purple);border-radius:50%;animation:spin 1s linear infinite}
  
  @keyframes spin{to{transform:rotate(360deg)}}
  @keyframes blink{0%,70%{opacity:1} 71%,100%{opacity:0.5}}
  @keyframes slideInUp{
    0%{opacity:0;transform:translateY(20px);} 
    100%{opacity:1;transform:translateY(0);}
  }
  @keyframes fadeIn{
    0%{opacity:0;} 
    100%{opacity:1;}
  }
  
  .pre-join{animation:fadeIn 0.5s ease-out}
  .wrap{animation:slideInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s both}
  .card{animation:slideInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s both}
  
  .live-dot{color:#107C10;animation:blink 2s ease-in-out infinite}
  .meeting-id-display{background:#f0f0f0;padding:8px 12px;border-radius:4px;font-family:monospace;font-size:13px;color:#605e5c;margin-top:8px;text-align:center}

  @media (max-width: 768px) {
    .wrap{padding:60px 10px 120px}
    .row{grid-template-columns:1fr;gap:4px}
    .status{justify-self:start}
  }