body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: 60px auto;
  padding: 30px;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

h2, h3, h4 {
  color: #d90000;
}

/* Botones */
.btn {
  display: inline-block;
  padding: 12px 20px;
  margin: 8px 4px 0 0;
  border-radius: 6px;
  font-weight: bold;
  text-decoration: none;
  transition: 0.2s;
  border: none;
  cursor: pointer;
}

.btn-red {
  background-color: #d90000;
  color: white;
}
.btn-red:hover {
  background-color: #b30000;
}

.btn-gray {
  background-color: #444;
  color: white;
}
.btn-gray:hover {
  background-color: #222;
}

/* Inputs y Formularios */
input[type="text"],
input[type="email"],
input[type="number"],
input[type="date"],
input[type="file"],
textarea {
  width: 100%;
  padding: 10px;
  margin-top: 8px;
  margin-bottom: 16px;
  border: 1px solid #ccc;
  border-radius: 4px;
  box-sizing: border-box;
}

/* Tablas */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
th, td {
  border: 1px solid #ccc;
  padding: 12px;
  text-align: left;
}
th {
  background-color: #d90000;
  color: white;
}
tr:hover {
  background-color: #f9f9f9;
}

/* Mensajes */
.mensaje {
  margin-top: 20px;
  padding: 12px;
  border-radius: 6px;
  font-weight: bold;
}
.mensaje.error {
  background-color: #ffe0e0;
  color: #b30000;
}
.mensaje.exito {
  background-color: #e0ffe0;
  color: #007700;
}