:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e3e6ea;
  --text: #1f2328;
  --muted: #6a737d;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(0,0,0,0.04);
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex; align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 52px;
}
.topbar .brand a { font-weight: 600; color: var(--text); font-size: 16px; }
.topbar .mainnav { margin-left: 32px; display: flex; gap: 20px; }
.topbar .mainnav a { color: var(--muted); font-weight: 500; }
.topbar .mainnav a:hover { color: var(--text); text-decoration: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

.bottombar {
  margin-top: 48px; padding: 16px 24px; text-align: center;
  color: var(--muted); border-top: 1px solid var(--border);
}

h1 { margin: 0 0 16px; font-size: 22px; font-weight: 600; }
h2 { margin: 24px 0 12px; font-size: 16px; font-weight: 600; }

.flash {
  background: #ecfeff;
  border: 1px solid #a5f3fc;
  color: #155e75;
  padding: 10px 14px; border-radius: var(--radius);
  margin-bottom: 16px;
}

.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 7px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  color: var(--text);
  font: inherit;
  text-decoration: none;
}
.btn:hover { background: #f3f4f6; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }
.btn-danger { color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }
.btn-sm { padding: 4px 8px; font-size: 12px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin-bottom: 16px;
}

table {
  width: 100%; border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: middle; }
th { background: #fafbfc; font-weight: 600; font-size: 13px; color: var(--muted); }
tr:last-child td { border-bottom: 0; }
tr:hover td { background: #fafbfc; }
.num { text-align: right; font-variant-numeric: tabular-nums; }

th a { color: inherit; }
th a.sort-active { color: var(--accent); }

form.inline { display: inline; }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-weight: 500; margin-bottom: 4px; font-size: 13px; }
.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=number],
.form-row input[type=password],
.form-row select,
.form-row textarea {
  width: 100%; padding: 7px 10px; border: 1px solid var(--border);
  border-radius: var(--radius); font: inherit; background: #fff;
}
.form-row textarea { min-height: 200px; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
.form-row .help { color: var(--muted); font-size: 12px; margin-top: 4px; }

.error { background: #fef2f2; border: 1px solid #fecaca; color: var(--danger); padding: 10px 14px; border-radius: var(--radius); margin-bottom: 16px; }

.filterbar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end;
}
.filterbar .group { display: flex; flex-direction: column; gap: 6px; }
.filterbar label { font-size: 12px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.03em; }
.filterbar select[multiple] { min-width: 180px; min-height: 70px; }
.filterbar .group select, .filterbar .group input { padding: 5px 8px; border: 1px solid var(--border); border-radius: var(--radius); background: #fff; }

.status {
  display: inline-block; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; text-transform: uppercase;
}
.status-draft { background: #f1f5f9; color: #475569; }
.status-sending { background: #fef9c3; color: #854d0e; }
.status-sent { background: #dcfce7; color: #15803d; }
.status-sample-sent { background: #dbeafe; color: #1d4ed8; }
.status-failed { background: #fee2e2; color: #b91c1c; }
.status-scheduled { background: #ede9fe; color: #6d28d9; }
.status-skipped { background: #f1f5f9; color: #475569; }
.status-subscribed { background: #dcfce7; color: #15803d; }
.status-unsubscribed { background: #f1f5f9; color: #475569; }
.status-bounced { background: #fee2e2; color: #b91c1c; }

.kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 24px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; }
.kpi .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
.kpi .value { font-size: 24px; font-weight: 600; margin-top: 4px; }

.preview-frame {
  border: 1px solid var(--border); border-radius: var(--radius); background: #fff;
  padding: 16px; max-width: 640px;
}

.muted { color: var(--muted); }
.right { text-align: right; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 800px) { .split { grid-template-columns: 1fr; } }