:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #1f2733;
  --muted: #6b7785;
  --line: #e3e7ec;
  --brand: #2563eb;
  --brand-ink: #fff;
  --danger: #dc2626;
  --ok: #15803d;
  --warn: #b45309;
  --radius: 8px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center; gap: 1.5rem;
  background: var(--panel); border-bottom: 1px solid var(--line);
  padding: 0 1.5rem; height: 56px;
}
.topbar .brand a { font-weight: 700; color: var(--ink); }
.topbar nav { display: flex; gap: 1rem; flex: 1; }
.topbar nav a { color: var(--muted); font-weight: 500; }
.topbar nav a:hover { color: var(--ink); text-decoration: none; }
.topbar .account { display: flex; gap: .8rem; align-items: center; color: var(--muted); font-size: .9rem; }

.container { max-width: 1080px; margin: 1.5rem auto; padding: 0 1.5rem; }
.container.narrow { max-width: 480px; }
h1 { font-size: 1.5rem; margin: .2rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.2rem 0 .6rem; }
.muted { color: var(--muted); }
.mono, .mono * { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .82rem; }

section { margin-bottom: 1.5rem; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.1rem 1.2rem; margin-bottom: 1.5rem; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.meta { display: flex; flex-wrap: wrap; gap: 1.2rem; color: var(--muted); font-size: .9rem; margin-bottom: 1rem; }

/* forms */
label { display: block; margin: .6rem 0; font-weight: 500; }
input, select, textarea {
  width: 100%; padding: .5rem .6rem; margin-top: .25rem;
  border: 1px solid var(--line); border-radius: 6px; font: inherit; background: #fff;
}
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85rem; }
label.checkbox { display: flex; align-items: center; gap: .5rem; font-weight: 400; }
label.checkbox input { width: auto; margin: 0; }
.inline-form { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }
.inline-form input { width: auto; }

.btn {
  display: inline-block; padding: .5rem .9rem; border: 1px solid var(--line);
  border-radius: 6px; background: #fff; color: var(--ink); font: inherit; font-weight: 500;
  cursor: pointer;
}
.btn:hover { background: #f0f2f5; text-decoration: none; }
.btn-primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn-primary:hover { background: #1d4fd7; }
.btn-danger { color: var(--danger); border-color: #f0c9c9; }
.btn-danger:hover { background: #fdecec; }
.btn-small { padding: .25rem .55rem; font-size: .82rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

table { width: 100%; border-collapse: collapse; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
th, td { text-align: left; padding: .55rem .7rem; border-bottom: 1px solid var(--line); font-size: .9rem; }
th { background: #fafbfc; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: none; }

.cards { display: flex; flex-wrap: wrap; gap: .8rem; margin-bottom: 1.2rem; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1rem; min-width: 110px; flex: 1; }
.card-num { font-size: 1.5rem; font-weight: 700; }
.card-label { color: var(--muted); font-size: .82rem; }
.card-warn { border-color: #f0c9c9; background: #fff7f7; }

.badge { display: inline-block; padding: .12rem .5rem; border-radius: 999px; font-size: .75rem; font-weight: 600; background: #eef1f4; color: var(--muted); text-transform: lowercase; }
.badge-active, .badge-sent, .badge-delivered, .badge-completed, .badge-ready { background: #e6f4ec; color: var(--ok); }
.badge-bounced, .badge-failed, .badge-cancelled, .badge-complained { background: #fdeaea; color: var(--danger); }
.badge-sending, .badge-scheduled, .badge-verifying, .badge-paused { background: #fef3e2; color: var(--warn); }

.flash { padding: .6rem .9rem; border-radius: 6px; margin-bottom: .8rem; font-size: .92rem; }
.flash-success { background: #e6f4ec; color: var(--ok); }
.flash-error { background: #fdeaea; color: var(--danger); }
.flash-info { background: #eaf1fd; color: var(--brand); }

.auth-card { max-width: 380px; margin: 8vh auto; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.6rem; }
.kv { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: .4rem 1.4rem; }
.kv li { color: var(--muted); }
.checks { list-style: none; padding: 0; }
.checks li { padding: .35rem .5rem; border-radius: 6px; margin-bottom: .25rem; font-size: .9rem; }
.checks li.ok { background: #f0f8f3; }
.checks li.bad { background: #fdf2f2; color: var(--danger); }
.bar { background: #eef1f4; border-radius: 999px; height: 8px; width: 160px; overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--brand); }
.pager { display: flex; gap: 1rem; align-items: center; margin-top: .8rem; color: var(--muted); }
.preview { border: 1px dashed var(--line); border-radius: 6px; padding: 1rem; min-height: 80px; background: #fff; }
details { margin-top: .5rem; }
code { background: #eef1f4; padding: .05rem .3rem; border-radius: 4px; font-size: .85em; }