:root{
    --ink:#0F1B2D;
    --ink-soft:#3C4658;
    --muted:#7B8494;
    --accent:#2F6F5E;
    --accent-light:#E7F0EC;
    --line:#E4E7EC;
    --paper:#FFFFFF;
    --canvas:#F6F7F9;
  }
  .webinar-main *, .webinar-card *{box-sizing:border-box;}
  .webinar-main,.webinar-card,.page-header,.tabs{color:var(--ink);}
  .webinar-main a,.webinar-card a,.page-header a,.tabs a{color:inherit;}

  /* ---- Page header ---- */
  .page-header{background:var(--paper);padding: 30px 0px;}
  .page-header-inner{max-width:1120px;margin:0 auto;}
  .page-header h1{font-size:32px;font-weight:700;margin:0 0 10px;}
  .page-header .sub{font-size:15.5px;color:var(--ink-soft);line-height:1.6;margin:0;max-width:64ch;}

  /* ---- Tabs ---- */
  .tabs{padding: 0 24px; display: flex; background:#fff;}
  .tabs .tab{background: none; border: none; cursor: pointer; font-size: 14.5px !important; font-weight: 600; color: var(--muted) !important; padding: 14px 2px !important; border-bottom: 2px solid transparent;}
  .tabs .tab{color: #0f1b2d !important; border-bottom: solid 1px #000 !important; z-index: 999999; background: none;}
  #tabs-border{border-top: 1px solid #e4e7ec !important; border-bottom: 1px solid #e4e7ec !important;}

  /* ---- Sticky sidebar column ---- */
  .webinar-sticky-column{position:-webkit-sticky;position:sticky;top:24px;align-self:flex-start;}

  /* ---- Sidebar filter card (left column) ---- */
  .webinar-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px;display:block;}
  .webinar-card .sidebar-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
  .webinar-card .sidebar-head span{font-size:14px;font-weight:700;}
  .webinar-card .clear-btn{background:none;border:none;cursor:pointer;font-size:12.5px;font-weight:600;color:#356699;padding:0;}

  .webinar-card .filter-group{margin:0 0 22px;}
  .webinar-card .filter-group:last-of-type{margin-bottom:0;}
  .webinar-card .filter-group-title{font-size:12.5px;font-weight:700;color:var(--muted);letter-spacing:.03em;margin:0 0 10px;text-transform:uppercase;}

  .webinar-card .filter-option{
    display:flex;
    align-items:center;
    flex-wrap:nowrap;
    gap:9px;
    font-size:13.5px;
    line-height:1.3;
    color:var(--ink-soft);
    padding:6px 0;
    cursor:pointer;
    margin:0;
  }
  .webinar-card .filter-option input[type="checkbox"]{
    appearance:auto;
    accent-color:var(--accent);
    width:15px;
    height:15px;
    margin:0;
    flex:0 0 15px;
    cursor:pointer;
  }
  .webinar-card .filter-option-label{flex:1 1 auto;}
  .webinar-card .filter-option .count{margin-left:auto;color:var(--muted);font-size:12px;flex:0 0 auto;}

  .webinar-card .other-links{margin-bottom: 0px; margin-top:10px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:10px;}
  .webinar-card .other-links a{
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13.5px;
    font-weight: 600;
    color: var(--ink-soft);
    text-decoration: none;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius:9px;
    transition:border-color .15s ease, color .15s ease, background .15s ease;
  }
  .webinar-card .other-links a:hover{ color: #151515; border-color: #151515 !important; background: #f2f2f2; }
  .webinar-card .other-links a svg{width:16px;height:16px;flex:0 0 16px;stroke:currentColor;}
  .webinar-card .other-links a span{flex:1 1 auto;}

  /* ---- Card list (right column) ---- */
  .webinar-main .list{display:grid;gap:20px;grid-template-columns:repeat(2, minmax(50%, 50%)) !important;}
  .webinar-main .card{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:26px 28px;}
  .webinar-main .card-title{font-size:19px;font-weight:700;line-height:1.4;margin:0 0 10px;}
  .webinar-main .card-title a{text-decoration:none;}
  .webinar-main .times{list-style:none;margin:0 0 14px;padding:0;display:flex;flex-direction:column;gap:4px;}
  .webinar-main .times li{font-size:14px;color:var(--ink-soft);}
  .webinar-main .times li:first-child{font-weight:600;color:var(--ink);}
  .webinar-main .format-line{font-size:13.5px;color:var(--muted);margin:0 0 18px;}
  .webinar-main .speaker-row{display:flex;align-items:flex-start;gap:12px;margin-bottom:16px;}
  .webinar-main .avatar{width:40px;height:40px;border-radius:50%;background:#f2f2f2;color:#0f1b2d;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;flex:0 0 auto;}
  .webinar-main .speaker-text{font-size:14px;line-height:1.5;}
  .webinar-main .speaker-name{font-weight:700;color:var(--ink);}
  .webinar-main .speaker-role{color:var(--muted);font-size:13px;}
  .webinar-main .desc{font-size:14px;line-height:1.65;color:var(--ink-soft);margin:0;max-width:56ch;}
  .webinar-main .card-foot{margin-top:20px;padding-top:18px;border-top:1px solid var(--line);}
  .webinar-main .register-link{display:inline-block;font-size:14px;font-weight:700;color:#fff; border: 2px solid #515151!important; background:#515151;padding:10px 22px !important; border-radius:8px;text-decoration:none;border:none;cursor:pointer;}
  .webinar-main .register-link:hover{background:#202020; border: 2px solid #202020 !important;}
  .webinar-main .load-more-row{text-align:center;margin-top:32px;}
  .webinar-main .load-more{background:var(--paper);border:1.5px solid var(--line);border-radius:8px;padding:11px 28px;font-size:14px;font-weight:600;color:var(--ink-soft);cursor:pointer;}
  .webinar-main .load-more:hover{border-color:var(--accent);color:var(--accent);}
  .webinar-main .empty-panel{padding:60px 0;text-align:center;color:var(--muted);font-size:14.5px;}

  /* ---- Register modal ---- */
  .modal-overlay{display:none;position:fixed;inset:0;background:rgba(15,27,45,.45);align-items:center;justify-content:center;padding:20px;z-index:100;}
  .modal-overlay.open{display:flex;}
  .modal-overlay .modal{background:var(--paper);border-radius:14px;max-width:420px;width:100%;padding:32px 28px;position:relative;}
  .modal-overlay .modal-close{position:absolute;top:16px;right:16px;background:none;border:none;cursor:pointer;font-size:18px;color:var(--muted);line-height:1;}
  .modal-overlay .modal h3{font-size:12.5px;font-weight:700;color:var(--accent);letter-spacing:.03em;margin:0 0 6px;}
  .modal-overlay .modal h2{font-size:21px;font-weight:700;margin:0 0 8px;}
  .modal-overlay .modal p.modal-sub{font-size:13.5px;color:var(--ink-soft);margin:0 0 22px;}
  .modal-overlay .field{margin-bottom:14px;}
  .modal-overlay .field label{display:block;font-size:12.5px;font-weight:600;color:var(--ink-soft);margin-bottom:6px;}
  .modal-overlay .field input, .modal-overlay .field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;font-family:inherit;color:var(--ink);}
  .modal-overlay .modal-submit{width:100%;margin-top:6px;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:12px;font-size:14.5px;font-weight:700;cursor:pointer;}
  .modal-overlay .modal-submit:hover{background:#265E4F;}
  .modal-overlay .modal-legal{font-size:11.5px;color:var(--muted);margin-top:12px;line-height:1.5;}
  .modal-overlay .modal-legal a{color:var(--accent);}

  @media (max-width:820px){
    .webinar-sticky-column{position:static;}
    .webinar-main .list{grid-template-columns:1fr !important;}
    .webinar-card{margin-bottom:43px !important}
  }
  @media (max-width:560px){
    .page-header{padding:36px 18px 28px;}
    .page-header h1{font-size:26px;}
    .webinar-main .card{padding:20px 20px;}
    .webinar-card{margin-bottom:45px !important}
  }