:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --border: #e4e6eb;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar .brand { font-weight: 700; font-size: 16px; }
.topbar nav a {
  margin-left: 18px;
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.topbar nav a.active, .topbar nav a:hover { color: var(--primary); }
.wrap { max-width: 880px; margin: 28px auto; padding: 0 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
}
.card h2 { margin-top: 0; font-size: 18px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 16px 0 6px; }
label:first-child { margin-top: 0; }
input[type=text], input[type=email], input[type=password], input[type=number], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
textarea { resize: vertical; }
.hint { color: var(--muted); font-size: 12px; margin-top: 4px; }
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); }
.row { display: flex; gap: 16px; }
.row > * { flex: 1; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
.badge { display: inline-block; padding: 2px 9px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.badge.sent { background: #dcfce7; color: var(--success); }
.badge.failed { background: #fee2e2; color: var(--danger); }
.badge.pending { background: #fef3c7; color: var(--warn); }
.badge.done { background: #e0e7ff; color: var(--primary); }
.badge.sending { background: #e0e7ff; color: var(--primary); }
.badge.paused { background: #fef3c7; color: var(--warn); }
.progressbar { background: #eee; border-radius: 999px; height: 10px; overflow: hidden; }
.progressbar > div { background: var(--primary); height: 100%; width: 0%; transition: width .3s; }
.alert { padding: 12px 16px; border-radius: 8px; font-size: 13px; margin-bottom: 16px; }
.alert.warn { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert.info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.log { max-height: 320px; overflow-y: auto; background: #0f172a; color: #e2e8f0; font-family: ui-monospace, monospace; font-size: 12.5px; padding: 14px; border-radius: 8px; line-height: 1.6; }
.log .ok { color: #4ade80; }
.log .err { color: #f87171; }
.muted { color: var(--muted); }
.stat { font-size: 26px; font-weight: 700; }
.stat-label { font-size: 12px; color: var(--muted); }