.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background-color: var(--clr-surface);
    border-bottom: 0.0625rem solid var(--clr-border);
    box-shadow: 0 0.125rem 0.5rem var(--clr-shadow);
    height: var(--navbar-height);
    transition: all 0.3s ease;
}

body.dark .header {
    background-color: var(--clr-surface-dark);
    border-bottom-color: var(--clr-border-dark);
    box-shadow: 0 0.125rem 0.5rem var(--clr-shadow-dark);
}

.hd-p-logo {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--clr-accent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 50%;
    transition: color 0.3s ease;
}

body.dark .hd-p-logo {
    color: var(--clr-accent-dark);
}

.hd-p-logo:hover {
    color: var(--clr-accent-hover);
}

body.dark .hd-p-logo:hover {
    color: var(--clr-accent-hover-dark);
}

.hd-bn-modos,
.hd-bn-hamburguesa {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: none;
    border-radius: 0.5rem;
    background-color: var(--clr-surface-alt);
    color: var(--clr-text);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.25rem;
    padding: 0;
    flex-shrink: 0;
}

body.dark .hd-bn-modos,
body.dark .hd-bn-hamburguesa {
    background-color: var(--clr-surface-alt-dark);
    color: var(--clr-text-dark);
}

.hd-bn-modos:hover,
.hd-bn-hamburguesa:hover {
    background-color: var(--clr-accent);
    color: var(--clr-bg);
    transform: scale(1.05);
    box-shadow: 0 0.25rem 0.75rem var(--clr-shadow-strong);
}

body.dark .hd-bn-modos:hover,
body.dark .hd-bn-hamburguesa:hover {
    background-color: var(--clr-accent-dark);
    color: var(--clr-bg-dark);
    box-shadow: 0 0.25rem 0.75rem var(--clr-shadow-strong-dark);
}

.hd-bn-modos:active,
.hd-bn-hamburguesa:active {
    transform: scale(0.95);
}

.hd-bn-modos-sun,
.hd-bn-modos-moon {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.hd-bn-modos-sun {
    display: block;
}

.hd-bn-modos-moon {
    display: none;
}

body.dark .hd-bn-modos-sun {
    display: none;
}

body.dark .hd-bn-modos-moon {
    display: block;
}

.hd-bn-hamburguesa .bi-list {
    display: block;
}

.hd-bn-hamburguesa .bi-x-lg {
    display: none;
}

.hd-bn-hamburguesa.activo .bi-list {
    display: none;
}

.hd-bn-hamburguesa.activo .bi-x-lg {
    display: block;
}

.hd-nav {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background-color: var(--clr-surface);
    border-bottom: 0.0625rem solid var(--clr-border);
    box-shadow: 0 0.25rem 1rem var(--clr-shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, opacity 0.3s ease;
    opacity: 0;
}

body.dark .hd-nav {
    background-color: var(--clr-surface-dark);
    border-bottom-color: var(--clr-border-dark);
    box-shadow: 0 0.25rem 1rem var(--clr-shadow-dark);
}

.hd-nav.nav-abierto {
    max-height: calc(100vh - var(--navbar-height));
    opacity: 1;
    overflow-y: auto;
}

.hd-nav-ul {
    list-style: none;
    margin: 0;
    padding: 1rem 0;
}

.hd-nav-ul-li {
    position: relative;
}

.hd-nav-ul-li-a {
    display: block;
    padding: 0.875rem 1.25rem;
    color: var(--clr-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    border-left: 0.25rem solid transparent;
}

body.dark .hd-nav-ul-li-a {
    color: var(--clr-text-dark);
}

.hd-nav-ul-li-a:hover {
    background-color: var(--clr-surface-alt);
    border-left-color: var(--clr-accent);
    color: var(--clr-accent);
    padding-left: 1.5rem;
}

body.dark .hd-nav-ul-li-a:hover {
    background-color: var(--clr-surface-alt-dark);
    border-left-color: var(--clr-accent-dark);
    color: var(--clr-accent-dark);
}

.submenu {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 0;
    overflow: hidden;
    background-color: var(--clr-bg);
    transition: max-height 0.4s ease, padding 0.3s ease;
}

body.dark .submenu {
    background-color: var(--clr-bg-dark);
}

.submenu.submenu-abierto {
    max-height: 31.25rem;
    padding: 0.5rem 0;
}

.submenu li {
    margin: 0;
}

.submenu a {
    display: block;
    padding: 0.625rem 1.25rem 0.625rem 2.5rem;
    color: var(--clr-text-muted);
    text-decoration: none;
    font-size: 0.9375rem;
    transition: all 0.3s ease;
    border-left: 0.25rem solid transparent;
}

body.dark .submenu a {
    color: var(--clr-text-muted-dark);
}

.submenu a:hover {
    background-color: var(--clr-surface-alt);
    color: var(--clr-accent);
    border-left-color: var(--clr-accent);
    padding-left: 2.75rem;
}

body.dark .submenu a:hover {
    background-color: var(--clr-surface-alt-dark);
    color: var(--clr-accent-dark);
    border-left-color: var(--clr-accent-dark);
}


@media (min-width: 48rem) {
    .header {
        padding: 0.75rem 2rem;
    }

    .hd-p-logo {
        font-size: 1.375rem;
        max-width: 60%;
    }

    .hd-bn-hamburguesa {
        display: none;
    }

    .hd-nav {
        position: static;
        max-height: none;
        opacity: 1;
        overflow: visible;
        background-color: transparent;
        border: none;
        box-shadow: none;
    }

    .hd-nav-ul {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0;
    }

    .hd-nav-ul-li {
        position: relative;
    }

    .hd-nav-ul-li-a {
        padding: 0.625rem 1rem;
        border-radius: 0.5rem;
        border-left: none;
        font-size: 0.9375rem;
    }

    .hd-nav-ul-li-a:hover {
        background-color: var(--clr-surface-alt);
        border-left: none;
        padding-left: 1rem;
        transform: translateY(-0.125rem);
    }

    body.dark .hd-nav-ul-li-a:hover {
        background-color: var(--clr-surface-alt-dark);
    }

    .submenu {
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 12.5rem;
        background-color: var(--clr-surface);
        border: 0.0625rem solid var(--clr-border);
        border-radius: 0.5rem;
        box-shadow: 0 0.5rem 1.25rem var(--clr-shadow-strong);
        margin-top: 0.5rem;
        max-height: 0;
        padding: 0;
        transition: all 0.3s ease;
        opacity: 0;
        transform: translateY(-0.625rem);
    }

    body.dark .submenu {
        background-color: var(--clr-surface-dark);
        border-color: var(--clr-border-dark);
        box-shadow: 0 0.5rem 1.25rem var(--clr-shadow-strong-dark);
    }

    .hd-nav-ul-li:hover .submenu {
        max-height: 31.25rem;
        padding: 0.5rem 0;
        opacity: 1;
        transform: translateY(0);
    }

    .submenu a {
        padding: 0.625rem 1rem;
        border-left: none;
        border-radius: 0;
        font-size: 0.875rem;
    }

    .submenu a:hover {
        background-color: var(--clr-accent);
        color: var(--clr-bg);
        padding-left: 1rem;
        transform: none;
    }

    body.dark .submenu a:hover {
        background-color: var(--clr-accent-dark);
        color: var(--clr-bg-dark);
    }
}

@media (min-width: 64rem) {
    .header {
        padding: 0.875rem 3rem;
    }

    .hd-p-logo {
        font-size: 1.5rem;
        max-width: none;
    }

    .hd-bn-modos {
        width: 2.75rem;
        height: 2.75rem;
        font-size: 1.375rem;
    }

    .hd-nav-ul {
        gap: 1rem;
    }

    .hd-nav-ul-li-a {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
    }

    .hd-nav-ul-li-a:hover {
        padding-left: 1.25rem;
    }

    .submenu {
        min-width: 15rem;
    }
}

@media (min-width: 90rem) {
    .header {
        padding: 1rem 4rem;
    }

    .hd-p-logo {
        font-size: 1.625rem;
    }

    .hd-nav-ul {
        gap: 1.5rem;
    }

    .hd-nav-ul-li-a {
        padding: 0.875rem 1.5rem;
        font-size: 1.0625rem;
    }

    .hd-nav-ul-li-a:hover {
        padding-left: 1.5rem;
    }
}