/* RESET */
* {
  box-sizing: border-box;
  margin: 0;
  font-family: Arial;
}

/* APP */
body {
  background: #e5e7eb;
  display: flex;
  justify-content: center;
}

.app {
  width: 100%;
  max-width: 380px;
  padding: 15px;
}

/* HEADER */
.header {
  text-align: center;
  font-weight: bold;
  font-size: 22px;
  margin-bottom: 10px;
}

/* CARD */
.card {
  background: white;
  padding: 15px;
  border-radius: 14px;
}

/* TITULOS */
h3 {
  margin: 12px 0 6px;
  font-size: 14px;
}

/* INPUTS */
input {
  width: 100%;
  padding: 10px;
  margin: 4px 0;
  border-radius: 8px;
  border: 1px solid #ccc;
}

/* EXTRA */
.extra button {
  width: 100%;
  text-align: left;
  padding: 10px;
  border: none;
  background: #f1f5f9;
  border-radius: 8px;
}

/* CONTENIDO */
.contenido {
  max-height: 0;
  overflow: hidden;
  transition: 0.3s;
}

.contenido.activo {
  max-height: 200px;
  margin-top: 5px;
}

/* BOTONES */
.botones {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.botones button {
  flex: 1;
  padding: 10px;
  border: none;
  border-radius: 8px;
  background: #111;
  color: white;
}

/* RESULTADO */
.resultado {
  margin-top: 10px;
  padding: 10px;
  background: #f1f5f9;
  border-radius: 8px;
}