/* Reset básico */
body, h1, h2, h3, p, ul, li, table {
  margin: 0;
  padding: 0;
  font-family: Arial, sans-serif;
}

body {
  background: #f5f6fa;
  color: #333;
  line-height: 1.5;
  padding: 1rem;
}

/* Layout */
.container {
  max-width: 900px;
  margin: 0 auto;
}

/* Navbar */
.navbar {
  display: flex;
  gap: 1rem;
  background: #0077ff;
  padding: 0.8rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.navbar a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
}

.navbar a:hover {
  text-decoration: underline;
}

/* Cards */
.card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h1, .card h2 {
  margin-bottom: 1rem;
}

/* Formularios */
label {
  display: block;
  margin-top: 0.8rem;
  font-weight: bold;
}

.form-control {
  display: block;
  width: 100%;
  padding: 0.5rem;
  margin-top: 0.3rem;
  border: 1px solid #ddd;
  border-radius: 6px;
}

button.btn, .btn {
  background: #0077ff;
  border: none;
  color: #fff;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 1rem;
  transition: background 0.2s ease;
}

.btn:hover {
  background: #005fcc;
}

.btn.light {
  background: #eee;
  color: #333;
}

.btn.light:hover {
  background: #ddd;
}

/* Tablas */
.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.table th, .table td {
  padding: 0.7rem;
  border-bottom: 1px solid #ddd;
}

.table th {
  background: #f0f0f0;
  text-align: left;
}

/* Alertas */
.alert {
  padding: 0.8rem;
  border-radius: 6px;
  margin-bottom: 1rem;
}

.alert.error {
  background: #ffe6e6;
  color: #c00;
}

.alert.success {
  background: #e6ffed;
  color: #090;
}

/* Footer */
footer {
  text-align: center;
  margin-top: 2rem;
  padding: 1rem 0;
  font-size: 14px;
  color: #666;
}