/* Estilos para mejorar la apariencia en dispositivos móviles */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    h2 {
        font-size: 1.5rem;
    }
    .card-title {
        font-size: 1.25rem;
    }
}

/* Asegurar que el spinner de carga esté centrado */
#loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    z-index: 1050;
}

/* --- Estilos del Conversor --- */
.input-group .btn-calculator,
.input-group .btn-copy {
    width: 42px;      /* Ancho fijo para botones */
    flex-shrink: 0;   /* Evitar que los botones se encojan */
}


/* --- Estilos de la Calculadora --- */

/* Contenedor del Modal */
#calculator-modal .modal-content {
    background-color: #1c1c1c;
    border-radius: 25px;
    border: none;
    box-shadow: 0 8px 25px rgba(0,0,0,0.4);
}

/* Forzar centrado horizontal del modal de la calculadora en todas las pantallas */
#calculator-modal .modal-dialog {
    margin-left: auto;
    margin-right: auto;
}

/* Display de la Calculadora */
.calculator-display {
    background-color: #1c1c1c;
    color: white;
    font-size: 3.5rem;
    font-weight: 300;
    width: 100%;
    text-align: right;
    padding: 20px;
    word-wrap: break-word;
    word-break: break-all;
    height: 120px;
}

/* Contenedor de los botones */
.calculator-keys {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 20px;
}

/* Estilo general de los botones */
.calculator-keys button {
    height: 60px;
    width: 60px;
    border-radius: 50%;
    border: none;
    font-size: 1.5rem;
    color: white;
    background-color: #505050;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: filter 0.2s;
    margin: 0 auto;
}

.calculator-keys button:active {
    filter: brightness(1.2);
}

/* Botón Cero (más ancho) */
.calculator-keys button.zero {
    width: 100%;
    grid-column: span 2;
    border-radius: 35px;
    justify-content: flex-start;
    padding-left: 23px;
}

/* Botones de Operadores (+, -, *, /, =) */
.calculator-keys button[data-key="="],
.calculator-keys button[data-key="+"],
.calculator-keys button[data-key="-"],
.calculator-keys button[data-key="*"],
.calculator-keys button[data-key="/"] {
    background-color: #0d6efd;
}

/* Botones de funciones especiales (C, %, ⌫) */
.calculator-keys button[data-key="C"],
.calculator-keys button[data-key="%"],
.calculator-keys button[data-key="⌫"] {
    background-color: #a6a6a6;
    color: black;
}

/* Icono de exportar */
.calculator-keys button[data-key="export"] {
    background-color: #0d6efd;
}