:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --surface-2: #273449;
  --border: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #6366f1;
  --danger: #ef4444;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: #a5b4fc; text-decoration: none; }
a:hover { text-decoration: underline; }

.muted { color: var(--muted); }

.container { max-width: 1000px; margin: 0 auto; padding: 1.5rem; }

/* Top bar */
.topbar {
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.topbar .brand a { font-weight: 700; color: var(--text); }
.topbar nav { display: flex; gap: 1rem; }
.topbar .logout { margin-left: auto; display: flex; align-items: center; gap: 0.75rem; }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; }
@media (max-width: 720px) { .grid { grid-template-columns: 1fr; } }

h1 { margin-top: 0; }
h2 { margin-top: 0; font-size: 1.1rem; }

/* Tables */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table th { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.row-actions { display: flex; gap: 0.4rem; }

/* Tags / definition lists */
.tag {
  display: inline-block; background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 0.05rem 0.55rem; margin: 0 0.2rem 0.2rem 0; font-size: 0.8rem;
}
.kv { display: grid; grid-template-columns: auto 1fr; gap: 0.4rem 1rem; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
.links { padding-left: 1.1rem; }

/* Forms */
label { display: block; margin-bottom: 0.6rem; font-size: 0.9rem; }
input[type=text], input[type=email], input[type=password] {
  display: block; width: 100%; margin-top: 0.25rem;
  padding: 0.5rem; border-radius: 6px; border: 1px solid var(--border);
  background: var(--bg); color: var(--text);
}
.check { display: flex; align-items: center; gap: 0.4rem; }
.check input { width: auto; margin: 0; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem 1rem; align-items: end; }
.form-grid > button { grid-column: 1 / -1; justify-self: start; }
.roles-field { grid-column: 1 / -1; border: 1px solid var(--border); border-radius: 6px; padding: 0.6rem; }
.roles-field legend { color: var(--muted); padding: 0 0.4rem; }
.inline-edit { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: end; }

/* Buttons */
.btn {
  font: inherit; cursor: pointer; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text);
  padding: 0.4rem 0.8rem; border-radius: 6px;
}
.btn:hover { filter: brightness(1.1); }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-danger { background: transparent; border-color: var(--danger); color: #fca5a5; }
.btn-ghost { background: transparent; }

/* Auth */
.auth-shell { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.auth-card { width: 100%; max-width: 360px; }
.auth-card h1 { margin: 0 0 0.25rem; font-size: 1.4rem; }
.auth-card button { width: 100%; margin-top: 0.5rem; }
.alert { background: rgba(239, 68, 68, 0.15); border: 1px solid var(--danger); color: #fca5a5; padding: 0.5rem 0.75rem; border-radius: 6px; margin-bottom: 0.75rem; }