h2 {
    color: #2c3e50;
    text-align: center;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

/* Grupos de Entrada */
.input-group {
    margin-bottom: 1.2rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #546e7a;
    font-size: 0.9rem;
    font-weight: bold;
}

input {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    box-sizing: border-box; /* Evita que el padding ensanche el input */
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus {
    outline: none;
    border-color: #3498db;
}

/* Botón */
button {
    width: 100%;
    background-color: #3498db;
    color: white;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    margin-top: 1rem;
}

button:hover {
    background-color: #2980b9;
}

button:active {
    transform: scale(0.98);
}

/* Caja de Resultados */
.result-box {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 2px solid #f0f0f0;
}

.result-box p {
    margin: 0.5rem 0;
    color: #7f8c8d;
    display: flex;
    justify-content: space-between;
}

.result-box span {
    font-weight: bold;
    color: #2c3e50;
}

hr {
    border: 0;
    border-top: 1px solid #eee;
    margin: 1rem 0;
}

h3 {
    color: #27ae60;
    text-align: center;
    margin-top: 0.5rem;
}

#total {
    color: #27ae60;
    font-size: 1.4rem;
}