:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #111827;
  --muted: #4b5563;
  --border: #d1d5db;
  --accent: #0f766e;
  --danger: #b91c1c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, sans-serif;
  color: var(--ink);
  background: linear-gradient(135deg, #f8fafc 0%, #eef2ff 100%);
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.9rem 1.2rem;
  background: #0b1220;
  color: #fff;
}
.topbar a { color: #c7d2fe; text-decoration: none; margin-left: 0.8rem; }
.brand { font-weight: 700; }

.container { max-width: 1200px; margin: 1.2rem auto; padding: 0 1rem; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 900px) {
  .grid.two { grid-template-columns: 1fr; }
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}
.card.narrow { max-width: 440px; margin: 2rem auto; }

label { display: block; margin: 0.6rem 0; color: var(--muted); font-size: 0.9rem; }
.input {
  display: block;
  width: 100%;
  margin-top: 0.25rem;
  padding: 0.55rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.btn {
  border: 1px solid var(--border);
  background: #f9fafb;
  color: var(--ink);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.8rem; }

.table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.table th, .table td { text-align: left; padding: 0.5rem; border-bottom: 1px solid #e5e7eb; }

.flash-stack { margin-bottom: 1rem; }
.flash { padding: 0.6rem 0.7rem; border-radius: 8px; margin-bottom: 0.4rem; }
.flash-success { background: #dcfce7; }
.flash-danger { background: #fee2e2; }
.flash-warning { background: #fef3c7; }
.flash-info { background: #dbeafe; }