:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #1c2733;
  --muted: #6b7785;
  --line: #e2e8f0;
  --brand: #0b62d6;
  --brand-ink: #ffffff;
  --danger-bg: #fdecea;
  --danger-ink: #b3261e;
  --ok: #137333;
  --shadow: 0 1px 3px rgba(16, 24, 40, .08), 0 1px 2px rgba(16, 24, 40, .06);
}

* { box-sizing: border-box; }

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

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .75rem 1.25rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
}
.topnav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.topnav a { color: var(--brand); text-decoration: none; }
.topnav a:hover { text-decoration: underline; }
.who { color: var(--muted); font-size: .9rem; }

/* Layout */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 2rem;
}
.card.center {
  max-width: 440px;
  margin: 3rem auto;
  text-align: center;
}
.card h1 { margin: .25rem 0 .5rem; font-size: 1.5rem; }
.muted { color: var(--muted); }
.status-icon { font-size: 2.5rem; line-height: 1; margin-bottom: .25rem; }

/* Buttons */
.btn {
  display: inline-block;
  padding: .7rem 1.25rem;
  border-radius: 8px;
  background: var(--brand);
  color: var(--brand-ink);
  text-decoration: none;
  font-weight: 600;
  border: none;
  cursor: pointer;
  margin-top: 1rem;
}
.btn:hover { filter: brightness(.95); }
.btn-google { background: var(--brand); }
.btn-link {
  color: var(--brand);
  text-decoration: none;
  font-size: .9rem;
}
.btn-link:hover { text-decoration: underline; }

/* Alerts */
.alert {
  background: var(--danger-bg);
  color: var(--danger-ink);
  border-radius: 8px;
  padding: .65rem .85rem;
  margin: 1rem 0 0;
  font-size: .92rem;
}

/* Tables (admin) */
.table-wrap { overflow-x: auto; }
table.users {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
table.users th, table.users td {
  text-align: left;
  padding: .6rem .65rem;
  border-bottom: 1px solid var(--line);
  vertical-align: middle;
}
table.users th {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  color: var(--muted);
}

/* Badges */
.badge {
  display: inline-block;
  padding: .15rem .55rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
}
.badge.active { background: #e6f4ea; color: var(--ok); }
.badge.pending { background: #fef7e0; color: #8a6d00; }
.badge.inactive { background: #f1f3f4; color: #5f6368; }
.badge.admin { background: #e8f0fe; color: var(--brand); }
.badge.staff { background: #f1f3f4; color: #444; }

/* Inline admin action forms */
.actions { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; }
.actions form { margin: 0; }
.actions button, .actions select {
  font-size: .85rem;
  padding: .35rem .6rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--card);
  cursor: pointer;
}
.actions button.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.actions button.danger { color: var(--danger-ink); border-color: #f2c7c3; }

/* Module grid (landing) */
.module-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}
.module-tile {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
}
.module-tile:hover { border-color: var(--brand); }
.empty-state {
  margin-top: 1.25rem;
  padding: 2.5rem 1.5rem;
  text-align: center;
  border: 1px dashed var(--line);
  border-radius: 12px;
  color: var(--muted);
  background: var(--card);
}

@media (max-width: 600px) {
  .topbar { flex-direction: column; align-items: flex-start; gap: .5rem; }
  .card { padding: 1.5rem; }
  .card.center { margin: 1.5rem auto; }
  .container { padding: 1rem; }
}