/* ==================== BOTÓN SUBRAYADO ==================== */

.button-underlined {
    display: inline-block;
    margin-bottom: 1.50rem;
    font-family: var(--font-cabinet);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-accent-aqua-secondary);
    letter-spacing: 0.020em;
    text-decoration: none;
    position: relative;
    transition:
        letter-spacing 0.50s ease,
        transform 0.50s ease;
}

.button-underlined:hover {
    letter-spacing: 0.050em;
    transform: translateX(5px);
}

.button-underlined::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0%;
    height: 2.0px;
    background-color: currentColor;
    transition: width 0.75s ease;
}

.button-underlined:hover::after {
    width: 100%;
}

/* ==================== BOTÓN SUBRAYADO PARA CARDS ==================== */

.button-underlined-card {
    display: inline-block;
    /* margin-bottom: 0.1rem; */
    font-family: var(--font-cabinet);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-accent-aqua-primary);
    letter-spacing: 0.020em;
    text-decoration: none;
    position: relative;
    transition:
        letter-spacing 0.50s ease,
        transform 0.50s ease;
}

.button-underlined-card:hover {
    letter-spacing: 0.050em;
    transform: translateX(5px);
}

.button-underlined-card::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 0%;
    height: 2.0px;
    background-color: currentColor;
    transition: width 0.75s ease;
}

.button-underlined-card:hover::after {
    width: 100%;
}

/* ==================== BOTÓN DINÁMICO ==================== */

.button-type-2 {
    position: relative;
    display: inline-block;
    cursor: pointer;
    border: 1px solid var(--color-accent-aqua-secondary);
    border-radius: var(--radius-button-type-2);
}

.button-type-2.learn-more {
    min-width: 15rem;
    width: auto;
    height: auto;
}

/* Círculo inicial */
.button-type-2.learn-more .circle {
    transition: all var(--time-transition-mid);
    position: relative;
    display: block;
    margin: 0;
    width: 3rem;
    height: 3rem;
    background: var(--color-accent-aqua-secondary);
    border-radius: var(--radius-button-type-2);
}

/* Posición del ícono SVG */
.button-type-2.learn-more .circle .icon {
    position: absolute;
    top: 0;
    bottom: 0;
    margin: auto;
    left: 0.75rem;
    right: auto;
    /* Posición del icono dentro del círculo */
    height: 1.5rem;
    /* Tamaño del área del icono */
    transition: transform var(--time-transition-fast) ease;
    will-change: transform;
}

/* Archivo SVG */
.button-type-2.learn-more .circle .icon .icon-svg {
    width: 100%;
    height: 100%;
    display: block;
    filter: invert(1);
    /* Invierte el color del ícono, 1=blanco, 0=negro */
}

/* Posición del texto */
.button-type-2.learn-more .button-text {
    transition: transform var(--time-transition-slow) ease;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    /* Evita que el texto se encime con el círculo */
    margin-left: 2.00rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-cabinet);
    font-size: 1.15rem;
    text-align: center;
    color: var(--color-accent-aqua-secondary);
    font-weight: 700;
    white-space: normal;
    /* Permite salto de línea */
    overflow: hidden;
    /* Evita que se salga del botón */
    line-height: 1.2;
    /* Buen interlineado para 2 líneas */
}

/* El círculo crece y cubre el botón completo */
.button-type-2:hover .circle {
    width: 100%;
}

/* Mueve el icono hacia la derecha */
.button-type-2:hover .circle .icon {
    left: auto;
    /* Libera el anclaje izquierdo */
    right: 0.75rem;
    /* Distancia al borde derecho */
}

/* Cambio en el color del texto tras haber crecido el círculo */
.button-type-2:hover .button-text {
    color: var(--color-text-tertiary);
    margin-right: 2.00rem;
}

/* Accecibilidad focus: Navegación por teclado */
.button-type-2:focus-visible {
    outline: 3px solid var(--color-accent-aqua-secondary);
    outline-offset: 4px;
    border-radius: 1.625rem;
}

/* Ajustes cuando el ancho es tipo tablet o mobile */
@media (max-width: 768px) {
    .button-type-2.learn-more {
        width: auto;
    }
}

/* ==================== BOTÓN SPOTLIGHT  ==================== */

/* Botón base */
.button-spotlight {
    --x: 50%;
    --y: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 20px 60px;
    min-height: 60px;
    border: none;
    cursor: pointer;
    font-family: var(--font-cabinet);
    font-size: var(--font-size-200);
    color: var(--color-text-tertiary);
    font-weight: 600;
    text-decoration: none;
    background: linear-gradient(90deg, #5fb5c8 0%, #3e8595 100%);
    position: relative;
    overflow: hidden;
}

/* Overlay radialcon posición --x/--y */
.button-spotlight::before {
    content: "";
    position: absolute;
    inset: -1px;
    pointer-events: none;
    background: radial-gradient(130px circle at var(--x) var(--y),
            rgba(60, 130, 145, 0.9) 0%,
            rgba(60, 130, 145, 0.00) 75%);
    opacity: 0;
}

/* Hover que activa overlay */
.button-spotlight:hover::before {
    opacity: 1;
}

/* Texto encima del overlay */
.button-spotlight>span {
    position: relative;
    z-index: 2;
}

/* ==================== BACK TO TOP BUTTON ==================== */

#back-to-top {
    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 2000;
    width: 3.5rem;
    border-radius: 50%;
    padding: 0;
    opacity: 0;
    transform: translateY(20px);
    visibility: hidden;
    transition: opacity var(--duration-1000) ease-in-out, transform var(--duration-1000) ease-in-out, visibility var(--duration-1000);
}

/* Aminación */
#back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Ícono */
#back-to-top .bi {
    font-size: var(--font-size-300);
}