:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --border: #e3e6ea;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #3159ff;
  --primary-dark: #1f3fd6;
  --success: #16a34a;
  --error: #dc2626;
  --warn: #d97706;
  --radius: 10px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}
.container { max-width: 1080px; margin: 0 auto; padding: 24px 16px 64px; }
.topnav {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--card); border-bottom: 1px solid var(--border);
  padding: 12px 24px;
}
.topnav .brand { font-weight: 700; }
.topnav .links a { margin-left: 16px; color: var(--text); text-decoration: none; font-size: 14px; }
.topnav .links a:hover { color: var(--primary); }
.topnav .user { margin-left: 16px; color: var(--muted); font-size: 14px; }

.card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin-bottom: 20px;
}
h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 0 0 12px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
input[type=text], input[type=email], input[type=password], input[type=number], input[type=file], textarea, select {
  width: 100%; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
textarea { min-height: 220px; font-family: ui-monospace, monospace; font-size: 13px; }
.help { color: var(--muted); font-size: 12px; margin-top: 4px; }
.btn {
  display: inline-block; padding: 9px 16px; border-radius: 8px; border: none;
  background: var(--primary); color: #fff; font-weight: 600; font-size: 14px; 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(--error); }
.btn.small { padding: 5px 10px; font-size: 12px; }

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; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: #fafbfc; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 700; }
.badge.pending { background:#eef0f4; color:#555; }
.badge.sending { background:#fff4d6; color:#9a6b00; }
.badge.sent { background:#e6f4ea; color:#177a3b; }
.badge.failed { background:#fde8e8; color:#b3261e; }
.badge.bounced { background:#fde8e8; color:#b3261e; }

.stats { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 20px; }
.stat { flex: 1; min-width: 120px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; text-align: center; }
.stat .num { font-size: 24px; font-weight: 700; }
.stat .lbl { font-size: 12px; color: var(--muted); margin-top: 2px; }

.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #e6f4ea; color: #177a3b; }
.alert-error { background: #fde8e8; color: #b3261e; }

.login-wrap { max-width: 360px; margin: 80px auto; }
.file-list { font-size: 13px; color: var(--muted); margin-top: 6px; }