.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(6, 19, 33, 0.97);
    backdrop-filter: blur(18px);
}

.header-container {
    display: flex;
    min-height: 88px;
    align-items: center;
    gap: 26px;
}

.brand {
    display: flex;
    flex-shrink: 0;
    align-items: center;
}

.brand-logo {
    width: 320px;
    max-height: 70px;
    object-fit: contain;
}

.main-navigation {
    margin-left: auto;
}

.main-navigation ul {
    display: flex;
    align-items: center;
    gap: 25px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-navigation a {
    position: relative;
    color: #d9e4f0;
    font-size: 0.9rem;
    font-weight: 700;
}

.main-navigation a::after {
    position: absolute;
    right: 0;
    bottom: -9px;
    left: 0;
    height: 2px;
    border-radius: 10px;
    background: var(--turquoise-500);
    content: "";
    opacity: 0;
    transform: scaleX(0);
    transition: opacity var(--transition), transform var(--transition);
}

.main-navigation a:hover,
.main-navigation a.is-active {
    color: var(--white);
}

.main-navigation a:hover::after,
.main-navigation a.is-active::after {
    opacity: 1;
    transform: scaleX(1);
}

.header-button {
    min-height: 44px;
    flex-shrink: 0;
    padding: 11px 18px;
    background: var(--blue-600);
    color: var(--white);
    font-size: 0.9rem;
}

.menu-toggle {
    display: none;
    width: 45px;
    height: 45px;
    margin-left: auto;
    padding: 10px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 10px;
    background: transparent;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    margin: 5px 0;
    border-radius: 5px;
    background: var(--white);
    transition: transform var(--transition), opacity var(--transition);
}

.site-footer {
    padding-top: 70px;
    background: var(--navy-950);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 50px;
    padding-bottom: 55px;
}

.footer-logo {
    width: 300px;
    max-height: 80px;
    margin-bottom: 18px;
    object-fit: contain;
}

.footer-brand p,
.footer-column a,
.footer-column p {
    color: #9fb0c4;
}

.footer-column {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

.footer-column h2 {
    margin-bottom: 8px;
    color: var(--white);
    font-size: 1rem;
    letter-spacing: 0;
}

.footer-column a,
.footer-column p {
    margin: 0;
    font-size: 0.9rem;
}

.footer-column a:hover {
    color: var(--turquoise-400);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    padding: 23px 0 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.footer-bottom p {
    margin: 0;
    color: #7f91a6;
    font-size: 0.82rem;
}

.whatsapp-float {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 900;
    display: inline-flex;
    width: 58px;
    height: 58px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #25d366;
    color: var(--white);
    box-shadow: 0 14px 32px rgba(4, 16, 29, 0.28);
    transition:
        transform 250ms ease,
        box-shadow 250ms ease,
        background 250ms ease;
}

.whatsapp-float:hover {
    background: #20bd5a;
    box-shadow: 0 18px 38px rgba(4, 16, 29, 0.34);
    transform: translateY(-4px) scale(1.06);
}

.whatsapp-float:focus-visible {
    outline: 3px solid var(--white);
    outline-offset: 4px;
}

.whatsapp-icon {
    width: 31px;
    height: 31px;
    fill: currentColor;
}

@media (max-width: 1100px) {
    .brand-logo {
        width: 275px;
    }

    .main-navigation ul {
        gap: 17px;
    }

    .header-button {
        display: none;
    }
}

@media (max-width: 860px) {
    .header-container {
        min-height: 78px;
    }

    .brand-logo {
        width: 245px;
        max-height: 62px;
    }

    .menu-toggle {
        display: block;
    }

    .main-navigation {
        position: fixed;
        top: 78px;
        right: 0;
        left: 0;
        display: none;
        height: calc(100vh - 78px);
        margin-left: 0;
        padding: 26px 20px;
        background: rgba(6, 17, 31, 0.992);
        overflow-y: auto;
    }

    .main-navigation.is-open {
        display: block;
    }

    .main-navigation ul {
        width: min(100%, 520px);
        margin-inline: auto;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .main-navigation li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.09);
    }

    .main-navigation a {
        display: block;
        padding: 17px 4px;
        font-size: 1.04rem;
    }

    .main-navigation a::after {
        display: none;
    }

    .menu-toggle.is-open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .menu-toggle.is-open span:nth-child(2) {
        opacity: 0;
    }

    .menu-toggle.is-open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 580px) {
    .brand-logo {
        width: 218px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 7px;
    }

    .footer-logo {
        width: 260px;
    }

    .whatsapp-float {
        right: 16px;
        bottom: 16px;
        width: 54px;
        height: 54px;
    }

    .whatsapp-icon {
        width: 29px;
        height: 29px;
    }
}
/* ==========================================================
   PASO 13 · HEADER, MENÚ Y FOOTER EN MÓVIL
========================================================== */

@media (max-width: 860px) {

    .main-navigation {
        height: calc(100dvh - 78px);
    }

}

@media (max-width: 580px) {

    .header-container {
        gap: 10px;
    }

    .brand {
        min-width: 0;
    }

    .brand-logo {
        width: min(218px, calc(100vw - 108px));
    }

    .menu-toggle {
        flex: 0 0 45px;
    }

    .footer-column a {
        display: flex;
        min-height: 44px;
        align-items: center;
    }

    .whatsapp-float {
        right: max(16px, env(safe-area-inset-right));
        bottom: max(16px, env(safe-area-inset-bottom));
    }

}

@media (max-width: 360px) {

    .brand-logo {
        width: 190px;
    }

}