:root{
  --bg:#f5f7fb;--panel:#fff;--text:#172033;--muted:#667085;--line:#e4e7ec;
  --primary:#2563eb;--danger:#b42318;--warning:#b54708
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--primary);text-decoration:none}
h1{margin-top:0}
.topbar{height:64px;background:#fff;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:2}
.topbar nav{display:flex;align-items:center;gap:14px}.topbar select{max-width:230px}
.badge{background:#eef4ff;color:#3538cd;padding:4px 8px;border-radius:999px;font-size:12px}
.layout{display:grid;grid-template-columns:245px 1fr;min-height:calc(100vh - 64px)}
aside{background:#fff;border-right:1px solid var(--line);padding:18px;display:flex;flex-direction:column;gap:5px}
aside a{padding:10px 12px;border-radius:8px;color:#344054}aside a:hover{background:#f2f4f7}
.content{padding:28px;min-width:0}.panel,.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:16px}
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:18px 0}
.card span,.card small{display:block;color:var(--muted)}.card strong{display:block;font-size:22px;margin:8px 0}
.login-shell{min-height:100vh;display:grid;place-items:center;padding:20px}.login-shell.wide{align-items:start;padding-top:40px}
.login-panel{width:min(440px,100%)}.registration{width:min(820px,100%)}.brand{font-size:24px;font-weight:800;color:var(--primary)}
label{display:block;font-weight:600;margin:13px 0}input,select{width:100%;padding:12px;border:1px solid #d0d5dd;border-radius:9px;margin-top:6px;background:#fff}
button,.button-link,.google-button{display:inline-flex;justify-content:center;align-items:center;background:var(--primary);color:#fff;border:0;border-radius:9px;padding:12px 17px;font-weight:700;cursor:pointer}
.google-button{width:100%;background:#fff;color:#344054;border:1px solid #d0d5dd;margin-top:12px}
button.secondary{background:#fff;color:#344054;border:1px solid #d0d5dd}button.danger{background:#b42318}
form>button{margin-top:8px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px}.checks-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 16px;margin:16px 0}
.muted,.field-help{color:var(--muted)}.field-help{display:block;font-weight:400;margin-top:5px}.alert,.success,.notice{padding:12px 14px;border-radius:9px;margin:12px 0}.alert{background:#fef3f2;color:#b42318}.success{background:#ecfdf3;color:#067647}.notice{background:#fffaeb;color:#b54708}
.separator{display:flex;align-items:center;gap:12px;color:var(--muted);margin:18px 0}.separator:before,.separator:after{content:"";height:1px;background:var(--line);flex:1}
.login-links{display:flex;justify-content:space-between;margin-top:18px}
table{width:100%;border-collapse:collapse;margin-top:18px;display:block;overflow:auto}thead,tbody{width:100%}th,td{text-align:left;padding:12px;border-bottom:1px solid var(--line);white-space:nowrap}td small{color:var(--muted)}
.diagnostic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.diagnostic-item{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:14px}.diagnostic-item small{display:block;color:var(--muted);margin-top:4px}.status{width:12px;height:12px;border-radius:50%;flex:0 0 auto}.status-ok{background:#12b76a}.status-warning{background:#f79009}.status-error{background:#f04438}
.code-box{background:#101828;color:#fff;padding:13px;border-radius:8px;overflow:auto}.check{display:flex;gap:10px;align-items:center}.check input{width:auto;margin:0}.compact-form{max-width:520px}.narrow-panel{max-width:620px}
.panel-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}.panel-heading h2{margin-top:0}.inline-form{margin:0}
.session-list{display:grid;gap:12px}.session-card{display:flex;justify-content:space-between;gap:20px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:16px}.session-card p{margin:6px 0;color:var(--muted)}.session-state{display:inline-block;background:#eef4ff;color:#3538cd;border-radius:999px;padding:4px 8px;font-size:12px;margin-left:8px}
@media(max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}.layout{grid-template-columns:1fr}aside{display:none}}
@media(max-width:600px){.grid,.form-grid,.checks-grid,.diagnostic-grid{grid-template-columns:1fr}.content{padding:16px}.topbar{padding:0 12px}.topbar nav span{display:none}.session-card,.panel-heading{align-items:stretch;flex-direction:column}}