:root{
  --bg:#f4f6f8;
  --panel:#fff;
  --text:#1f2937;
  --muted:#6b7280;
  --border:#dfe3e8;
  --accent:#1769aa;
  --accent-dark:#0f4f82;
  --danger:#b42318;
  --warning:#fff2cc;
}
*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:var(--bg);color:var(--text)}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.topbar{display:flex;align-items:center;gap:24px;padding:14px 24px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.brand{font-size:20px;font-weight:700;color:var(--text)}
.topbar nav{display:flex;gap:18px;flex:1}
.topbar .user{color:var(--muted);font-size:14px}
.container{max-width:1450px;margin:0 auto;padding:24px}
.page-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:20px}
.page-heading h1{margin:0 0 6px;font-size:28px}
.page-heading p{margin:0;color:var(--muted)}
.button,button{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:7px;padding:10px 15px;font-weight:700;cursor:pointer}
.button:hover,button:hover{background:var(--accent-dark);text-decoration:none}
.secondary{background:#e9eef3!important;color:#223!important}
.small{padding:6px 10px;font-size:12px}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:20px}
.stat{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px}
.stat span{display:block;color:var(--muted);font-size:14px}
.stat strong{display:block;font-size:34px;margin-top:8px}
.stat.alert strong{color:var(--danger)}
.panel{background:#fff;border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:20px}
.panel-head{display:flex;justify-content:space-between;align-items:center}
.panel h2{margin-top:0}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:11px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top;font-size:14px}
th{font-size:12px;text-transform:uppercase;letter-spacing:.03em;color:var(--muted);background:#fafafa}
.overdue-row{background:var(--warning)}
.badge{background:#edf2f7;border-radius:999px;padding:4px 8px;font-size:12px;white-space:nowrap}
.truncate{max-width:350px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.form-grid .full{grid-column:1/-1}
label{display:block;font-weight:700;font-size:13px;margin-bottom:12px}
input,select,textarea{width:100%;margin-top:6px;padding:10px;border:1px solid #cfd6de;border-radius:6px;background:#fff;font:inherit}
textarea{resize:vertical}
.searchbar{display:grid;grid-template-columns:1fr 230px auto auto;gap:10px;margin-bottom:18px}
.searchbar input,.searchbar select{margin:0}
.two-col{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(340px,.7fr);gap:20px}
.notes{display:flex;flex-direction:column;gap:10px}
.note{border-left:3px solid #cbd5e1;padding:10px 12px;background:#fafafa}
.note-meta{font-size:12px;color:var(--muted);margin-bottom:6px}
.notice,.error{padding:12px 14px;border-radius:6px;margin-bottom:15px}
.notice{background:#e9f7ef;border:1px solid #b7dfc5}
.error{background:#fff0f0;border:1px solid #f0b8b8;color:#7a1616}
.muted{color:var(--muted)}
.inline{display:inline}
.auth-page{display:grid;min-height:100vh;place-items:center;padding:20px}
.auth-card{width:min(430px,100%);background:#fff;border:1px solid var(--border);border-radius:12px;padding:28px}
.auth-card h1{margin-top:0}
code{background:#f2f2f2;padding:2px 5px;border-radius:4px}
@media(max-width:900px){
  .stats{grid-template-columns:1fr 1fr}
  .two-col{grid-template-columns:1fr}
  .form-grid{grid-template-columns:1fr}
  .searchbar{grid-template-columns:1fr}
  .topbar{align-items:flex-start;flex-wrap:wrap}
  .topbar nav{order:3;width:100%;overflow:auto}
}

.email-tools{display:grid;grid-template-columns:minmax(280px,.7fr) minmax(0,1.3fr);gap:28px}
.email-tools h3{margin-top:0}
@media(max-width:900px){.email-tools{grid-template-columns:1fr}}