:root {
  --bg: #0f1419;
  --card: #1a2332;
  --border: #2d3a4d;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --danger: #ef4444;
  --success: #22c55e;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 24px 16px 48px; }
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 12px;
  flex-wrap: wrap;
}
.topbar h1 { margin: 0; font-size: 1.35rem; font-weight: 600; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  color: #fff;
  background: var(--accent);
}
.btn:hover { background: var(--accent-hover); text-decoration: none; }
.btn.secondary { background: transparent; border-color: var(--border); color: var(--text); }
.btn.secondary:hover { border-color: var(--accent); }
.btn.danger { background: var(--danger); }
.btn.sm { padding: 5px 10px; font-size: 13px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 13px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
}
.badge.on { background: rgba(34,197,94,.15); color: var(--success); }
.badge.off { background: rgba(239,68,68,.15); color: var(--danger); }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
input, textarea, select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0d1218;
  color: var(--text);
  font-size: 14px;
  margin-bottom: 14px;
}
textarea { min-height: 80px; resize: vertical; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

.login-box { max-width: 400px; margin: 10vh auto; }
.muted { color: var(--muted); font-size: 13px; }
.qr-box { text-align: center; padding: 24px; }
#qrcode canvas, #qrcode img { border-radius: 8px; background: #fff; padding: 8px; }
.url-copy {
  margin-top: 16px;
  display: flex;
  gap: 8px;
}
.url-copy input { margin: 0; flex: 1; font-size: 13px; }
.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; background: rgba(59,130,246,.12); border: 1px solid var(--accent); }

.amt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}
.amt-btn {
  padding: 12px 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0d1218;
  color: var(--text);
  font-size: 15px;
  cursor: pointer;
}
.amt-btn:hover { border-color: var(--accent); }
.amt-btn.active {
  border-color: var(--accent);
  background: rgba(59,130,246,.15);
}