:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --success: #16a34a;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

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

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

.topbar h1 {
  font-size: 18px;
  margin: 0;
}

.topbar nav a {
  margin-left: 16px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}

.topbar nav a:hover { color: var(--primary); }

.container {
  max-width: 960px;
  margin: 32px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
}

.center-card {
  max-width: 380px;
  margin: 80px auto;
}

h2 { margin-top: 0; }

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

th, td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}

th { color: var(--muted); font-weight: 600; }

.form-group { margin-bottom: 16px; }

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--muted);
}

input[type=text], input[type=password], input[type=number], textarea, select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  background: #fff;
  color: var(--text);
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 6px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--primary-dark); }

.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #b91c1c; }

.btn-secondary { background: #6b7280; }
.btn-secondary:hover { background: #4b5563; }

.btn-small { padding: 6px 12px; font-size: 13px; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 160px; }

.flash {
  padding: 12px 16px;
  border-radius: 6px;
  margin-bottom: 20px;
  font-size: 14px;
}

.flash-success { background: #dcfce7; color: #166534; }
.flash-error { background: #fee2e2; color: #991b1b; }

.muted { color: var(--muted); font-size: 13px; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-total { background: #dbeafe; color: #1e3a8a; }

.actions-cell { white-space: nowrap; }

.landing {
  max-width: 480px;
  margin: 100px auto;
  text-align: center;
}

.landing .btn { margin: 8px; min-width: 180px; }

.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
  }

  .topbar nav {
    display: flex;
    flex-wrap: wrap;
    gap: 4px 14px;
  }

  .topbar nav a { margin-left: 0; }

  .container { margin: 16px auto; padding: 0 12px; }

  .card { padding: 16px; }

  .center-card, .landing { margin-top: 40px; }

  .row > * { min-width: 100%; }

  .btn { width: 100%; text-align: center; }

  .btn + .btn { margin-top: 8px; }

  .actions-cell { display: flex; flex-direction: column; gap: 6px; white-space: normal; }
  .actions-cell form,
  .actions-cell .btn { width: 100%; margin: 0; }

  /* evita zoom automático no iOS ao focar campos com fonte < 16px */
  input[type=text], input[type=password], input[type=number], textarea, select {
    font-size: 16px;
  }
}