:root{--bg:#f6f6f4;--card:#fff;--ink:#1d1d1f;--muted:#6b6b70;--line:#e3e3e0;--accent:#1f4fd8;--ok:#157f3b;--err:#b42318;color:var(--ink);background:var(--bg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}*{box-sizing:border-box}body{margin:0}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1{margin:0 0 1rem;font-size:1.5rem}h2{margin:0 0 .75rem;font-size:1.1rem}.top{background:var(--card);border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:.75rem 1.5rem;display:flex}.top .brand{color:var(--ink);font-weight:700}.top form{color:var(--muted);align-items:center;gap:.75rem;font-size:.9rem;display:flex}main{max-width:1200px;margin:0 auto;padding:1.5rem}.card{background:var(--card);border:1px solid var(--line);border-radius:10px;margin-bottom:1.25rem;padding:1.25rem}.grid{grid-template-columns:1fr 1fr;gap:1.25rem;display:grid}@media (max-width:900px){.grid{grid-template-columns:1fr}}label{color:var(--muted);margin:.6rem 0 .25rem;font-size:.85rem;display:block}input[type=text],input[type=email],textarea{border:1px solid var(--line);width:100%;font:inherit;background:#fff;border-radius:6px;padding:.55rem .7rem}textarea{font-family:ui-monospace,Menlo,monospace;font-size:.8rem}.row{flex-wrap:wrap;align-items:end;gap:.75rem;display:flex}.row>*{flex:1}.row>button,.row>.shrink{flex:none}button{font:inherit;border:1px solid var(--line);cursor:pointer;background:#fff;border-radius:6px;margin-top:.75rem;padding:.55rem 1rem}button:hover{border-color:var(--muted)}button:disabled{opacity:.5;cursor:wait}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.danger{color:var(--err)}button.link{color:var(--accent);background:0 0;border:0;margin:0;padding:0;font-size:.85rem}.msg{margin:.6rem 0 0;font-size:.9rem}.ok{color:var(--ok)}.err{color:var(--err)}.muted{color:var(--muted);font-size:.85rem}code{background:#f0f0ee;border-radius:4px;padding:0 .3em;font-size:.85em}table{border-collapse:collapse;width:100%;font-size:.9rem}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:.45rem .5rem}th{color:var(--muted);font-weight:500}.badge{background:#eee;border-radius:99px;padding:.1rem .5rem;font-size:.75rem;display:inline-block}.badge.sent{color:var(--ok);background:#dcf3e3}.badge.failed{color:var(--err);background:#fde4e1}.badge.sending{color:var(--accent);background:#e3e9fb}iframe.preview{border:1px solid var(--line);background:#fff;border-radius:6px;width:100%;height:720px}.login{max-width:420px;margin:12vh auto}