#banner {
    background-color: #f9f5f5;
    text-align: center;
    width: 100%;
    min-height: 30rem;
    overflow: hidden;
    margin-bottom: 3rem;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    position: relative;
    isolation: isolate;
    display: flex;
    align-items: center;
}

/* Capas de fondo para rotación suave */
#banner .banner-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.4s ease-in-out;
    will-change: opacity, background-position;
    z-index: 0;
    pointer-events: none;
}

#banner .banner-bg.is-visible {
    opacity: 1;
}

#banner::before {
    content: "";
    position: absolute;
    inset: 0;
    /* Alpha dinámico: 85% en móvil (~320px) → 0% en desktop (≥1200px) */
    /* #f9f5f5 = rgb(249 245 245). El 2º stop usa alpha variable con el ancho */
    --banner-alpha: clamp(0, calc((1200px - 100vw) / 1035px), 0.85);
    background: linear-gradient(
        45deg,
        #f9f5f5 20%,
        rgb(249 245 245 / var(--banner-alpha))
    );
    z-index: 1;
    pointer-events: none;
}

#banner .filled_wave {
    position: absolute;
    top: 0;
    background-image: url('../bg/wave_02.svg');
    background-repeat: repeat-x;
    background-size: 7rem;
    z-index: 10;
    width: 100%;
    height: 1.5rem;
}

#banner > div,
#banner .banner-content {
    position: relative;
    z-index: 2;
}

#banner .banner-content {
    padding-top: 4rem;
}

#banner > div > * {
    text-align: left;
    opacity: 1;
}

#banner h3 {
    font-weight: 100;
    font-size: 1.5rem;
    margin-top: 2rem;
    color: #f02004;
}

#banner h1, #banner h2 {
    font-size: 5rem;
    font-weight: 500;
    margin-top: 1rem;
    margin-bottom: 2rem;
    max-width: 40rem;
    line-height: 1;
}

#banner h2 {
    margin: 0;
    padding: 0;
}

#banner .highlight {
    color: #f02004;
}

#banner p {
    max-width: 35rem;
    line-height: 1.5;
    margin-bottom: 2rem;
}

@media (max-width: 640px) {
    #banner {
        margin-bottom: 1rem;
    }

    #banner h1, #banner h2 {
        font-size: 3rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    #banner .banner-bg {
        transition: none;
    }
}