:root{
    --bg:#f5f7fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --border:#e5e7eb;
    --primary:#1d4ed8;
    --primary-dark:#1e40af;
    --danger:#b91c1c;
    --success:#047857;
    --warning:#b45309;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);font-family:Arial,Helvetica,sans-serif;color:var(--text);font-size:14px}
a{color:var(--primary);text-decoration:none}
.container{max-width:1200px;margin:0 auto;padding:24px}
.topbar{background:#0f172a;color:#fff;padding:14px 24px;display:flex;align-items:center;justify-content:space-between}
.topbar a{color:#fff;margin-left:16px;font-weight:600}
.logo{font-size:18px;font-weight:700;letter-spacing:.2px}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:20px;box-shadow:0 8px 18px rgba(15,23,42,.04);margin-bottom:18px}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}
.stat strong{font-size:26px;display:block;margin-top:6px}
.stat span{color:var(--muted)}
h1,h2,h3{margin-top:0}
.btn{display:inline-block;background:var(--primary);color:#fff!important;border:none;border-radius:8px;padding:9px 13px;cursor:pointer;font-weight:700;font-size:14px}
.btn:hover{background:var(--primary-dark)}
.btn.secondary{background:#475569}
.btn.danger{background:var(--danger)}
.btn.light{background:#e5e7eb;color:#111827!important}
input,select,textarea{width:100%;border:1px solid var(--border);border-radius:8px;padding:9px;background:#fff;color:var(--text)}
textarea{min-height:120px}
label{display:block;font-weight:700;margin-bottom:6px}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.form-row{margin-bottom:14px}
table{width:100%;border-collapse:collapse;background:#fff}
th,td{border-bottom:1px solid var(--border);padding:10px;text-align:left;vertical-align:top}
th{background:#f8fafc;font-size:13px;color:#334155}
.badge{display:inline-block;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:700}
.badge.open{background:#fee2e2;color:#991b1b}
.badge.sent{background:#dbeafe;color:#1e40af}
.badge.closed{background:#dcfce7;color:#166534}
.badge.paused{background:#fef3c7;color:#92400e}
.alert{padding:12px 14px;border-radius:8px;margin-bottom:14px;border:1px solid}
.alert.success{background:#ecfdf5;color:#065f46;border-color:#a7f3d0}
.alert.error{background:#fef2f2;color:#991b1b;border-color:#fecaca}
.alert.info{background:#eff6ff;color:#1e3a8a;border-color:#bfdbfe}
.filters{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:10px;align-items:end;margin-bottom:14px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
.small{font-size:12px;color:var(--muted)}
.login-wrap{max-width:420px;margin:80px auto}
@media(max-width:900px){.grid,.form-grid,.filters{grid-template-columns:1fr}.container{padding:14px}.topbar{display:block}.topbar nav{margin-top:10px}}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{max-height:38px;max-width:150px;background:#fff;border-radius:6px;padding:3px}
.settings-logo{max-height:80px;max-width:220px;border:1px solid var(--border);border-radius:8px;padding:6px;background:#fff}
pre{white-space:pre-wrap;background:#f8fafc;border:1px solid var(--border);border-radius:8px;padding:12px;overflow:auto}