:root {
  --bg: #0f1420;
  --panel: #161d2e;
  --border: #2a3346;
  --text: #e6e9f0;
  --muted: #8a93a6;
  --accent: #5b8def;
  --danger: #e5484d;
  --warn: #e5a800;
  --ok: #2fb872;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}

.topnav .brand { font-weight: 700; letter-spacing: 0.3px; }
.topnav a { color: var(--text); text-decoration: none; margin-left: 18px; font-size: 14px; }
.topnav a:hover { color: var(--accent); }

.container { max-width: 1100px; margin: 0 auto; padding: 28px 24px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 18px;
}

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 0 0 12px; }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

.stat { text-align: center; }
.stat .num { font-size: 28px; font-weight: 700; }
.stat .label { color: var(--muted); font-size: 13px; margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
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; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.badge.pending { background: #2a3346; color: var(--muted); }
.badge.sent { background: #22314f; color: var(--accent); }
.badge.opened { background: #3a3320; color: var(--warn); }
.badge.clicked { background: #4a2a1f; color: #ff8a5c; }
.badge.submitted { background: #3a1e21; color: var(--danger); }
.badge.failed { background: #3a1e21; color: var(--danger); }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #06101f;
  border: none;
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
.btn.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.danger { background: var(--danger); color: white; }

label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
input[type=text], input[type=email], input[type=password], input[type=file], textarea, select {
  width: 100%; padding: 9px 10px; background: #0d1220; border: 1px solid var(--border);
  border-radius: 6px; color: var(--text); font-size: 14px; font-family: inherit;
}
textarea { min-height: 160px; font-family: Consolas, monospace; }

.muted { color: var(--muted); }
.actions { margin-top: 16px; display: flex; gap: 10px; }
.alert { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.alert.warn { background: #3a3320; color: var(--warn); border: 1px solid #574a1f; }
.alert.error { background: #3a1e21; color: var(--danger); border: 1px solid #5a2a2e; }

a.link { color: var(--accent); }
.list-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border); }
.list-item:last-child { border-bottom: none; }