/* Site header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    background:
        linear-gradient(
             rgba(210, 235, 250, 0.24),
        rgba(185, 220, 242, 0.34)
        ),
        url('../images/nav-bg02.webp') center 72% / cover no-repeat;
    border-bottom: 0;
    box-shadow: 0 4px 18px rgba(22, 50, 79, 0.10);
}

/* Header gradient accent */
.site-header::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 5px;
    content: "";
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-secondary),
        var(--color-accent)
    );
}

/* Navigation */
.site-nav {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 88px;
    gap: 2rem;
}

/* Site logo */
.site-logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    margin-left: -40px;
    text-decoration: none;
}

/* Logo image */
.site-logo img {
    display: block;
    width: auto;
    max-width: 230px;
    max-height: 82px;
    object-fit: contain;
}

/* Navigation menu */
.nav-menu {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 1.5rem;
}

/* Navigation list */
.nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

/* Navigation item */
.nav-item {
    margin: 0;
}

/* Navigation link */
.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.5rem 0.7rem;
    color: var(--color-heading);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    transition:
        color var(--transition),
        background-color var(--transition);
}

/* Navigation underline */
.nav-link::after {
    position: absolute;
    right: 0.7rem;
    bottom: 4px;
    left: 0.7rem;
    height: 3px;
    content: "";
    background: linear-gradient(
        90deg,
        var(--color-primary),
        var(--color-secondary),
        var(--color-accent)
    );
    border-radius: 999px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
}

/* Navigation hover */
.nav-link:hover {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.58);
}

/* Navigation active underline */
.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.is-active::after {
    transform: scaleX(1);
}

/* Navigation active link */
.nav-link.is-active {
    color: var(--color-primary);
    background: rgba(255, 255, 255, 0.56);
}

/* Navigation CTA */
.nav-cta {
    flex-shrink: 0;
}

/* Navigation CTA button */
.nav-cta .btn {
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    box-shadow: 0 5px 16px rgba(11, 95, 165, 0.20);
}

/* CTA shine accent */
.nav-cta .btn::after {
    position: absolute;
    top: 0;
    bottom: 0;
    left: -120%;
    width: 60%;
    content: "";
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.25),
        transparent
    );
    transform: skewX(-20deg);
    transition: left 0.55s ease;
}

/* CTA hover shine */
.nav-cta .btn:hover::after {
    left: 140%;
}

/* Mobile toggle */
.nav-toggle {
    display: none;
    position: relative;
    width: 48px;
    height: 48px;
    padding: 0;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.88);
    border: 1px solid rgba(11, 95, 165, 0.15);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    cursor: pointer;
}

/* Toggle lines */
.nav-toggle-line {
    position: absolute;
    left: 10px;
    width: 28px;
    height: 3px;
    background: var(--color-heading);
    border-radius: 999px;
    transition:
        top var(--transition),
        transform var(--transition),
        opacity var(--transition),
        background-color var(--transition);
}

/* Toggle line one */
.nav-toggle-line:nth-child(1) {
    top: 14px;
}

/* Toggle line two */
.nav-toggle-line:nth-child(2) {
    top: 22px;
}

/* Toggle line three */
.nav-toggle-line:nth-child(3) {
    top: 30px;
}

/* Toggle hover */
.nav-toggle:hover {
    border-color: rgba(22, 125, 141, 0.30);
}

/* Toggle hover lines */
.nav-toggle:hover .nav-toggle-line {
    background: var(--color-secondary);
}

/* Hamburger to X */
.nav-toggle.is-open .nav-toggle-line:nth-child(1) {
    top: 22px;
    transform: rotate(45deg);
}

/* Hamburger middle hidden */
.nav-toggle.is-open .nav-toggle-line:nth-child(2) {
    opacity: 0;
}

/* Hamburger bottom line */
.nav-toggle.is-open .nav-toggle-line:nth-child(3) {
    top: 22px;
    transform: rotate(-45deg);
}



/* Compact desktop */
@media (min-width: 901px) and (max-width: 1180px) {
    .site-nav {
        gap: 1rem;
    }

    .site-logo {
        margin-left: 0;
    }

    .site-logo img {
        max-width: 195px;
        max-height: 72px;
    }

    .nav-menu {
        gap: 0.75rem;
    }

    .nav-list {
        gap: 0.05rem;
    }

    .nav-link {
        padding: 0.45rem 0.45rem;
        font-size: 0.88rem;
    }

    .nav-link::after {
        right: 0.45rem;
        left: 0.45rem;
    }

    .nav-cta .btn {
        padding-right: 0.9rem;
        padding-left: 0.9rem;
        font-size: 0.88rem;
    }

    .nav-toggle {
        display: none !important;
    }
}

/* Tablet and mobile */
@media (max-width: 900px) {

    .site-header {
        background:
            linear-gradient(
                rgba(245, 249, 252, 0.34),
                rgba(245, 249, 252, 0.48)
            ),
            url('../images/footer-bg.webp') 68% center / cover no-repeat;
    }

    .site-nav {
        min-height: 78px;
    }

    .site-logo {
        margin-left: 0;
    }

    .site-logo img {
        max-width: 210px;
        max-height: 72px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        display: block;
        max-height: 0;
        overflow: hidden;
        visibility: hidden;
        padding: 0;
        background:
            linear-gradient(
                rgba(245, 249, 252, 0.88),
                rgba(245, 249, 252, 0.94)
            ),
            url('../images/footer-bg.webp') 68% center / cover no-repeat;
        border-top: 1px solid rgba(11, 95, 165, 0.12);
        box-shadow: 0 12px 28px rgba(22, 50, 79, 0.14);
        opacity: 0;
        transition:
            max-height 0.35s ease,
            opacity var(--transition),
            visibility var(--transition),
            padding var(--transition);
    }

    .nav-menu::after {
        position: absolute;
        right: 0;
        bottom: 0;
        left: 0;
        height: 4px;
        content: "";
        background: linear-gradient(
            90deg,
            var(--color-primary),
            var(--color-secondary),
            var(--color-accent)
        );
    }

    .nav-menu.is-open {
        max-height: 700px;
        visibility: visible;
        padding: 1rem 5% 1.5rem;
        opacity: 1;
    }

    .nav-list {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid rgba(11, 95, 165, 0.10);
    }

    .nav-link {
        width: 100%;
        min-height: 52px;
        padding: 0.8rem 0.5rem;
        border-radius: 0;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover,
    .nav-link.is-active {
        color: var(--color-primary);
        background: linear-gradient(
            90deg,
            rgba(11, 95, 165, 0.08),
            rgba(22, 125, 141, 0.05),
            rgba(233, 168, 37, 0.03)
        );
    }

    .nav-cta {
        margin-top: 1.25rem;
    }

    .nav-cta .btn {
        width: 100%;
    }
}


/* Mobile */
@media (max-width: 600px) {

    .site-header {
        background:
            linear-gradient(
                rgba(245, 249, 252, 0.38),
                rgba(245, 249, 252, 0.52)
            ),
            url('../images/footer-bg.webp') 72% center / cover no-repeat;
    }

    .site-nav {
        min-height: 72px;
    }

    .site-logo img {
        max-width: 175px;
        max-height: 60px;
    }

    .nav-toggle {
        width: 46px;
        height: 46px;
    }

    .nav-toggle-line {
        left: 9px;
    }

    .nav-menu.is-open {
        padding-right: 4%;
        padding-left: 4%;
    }
}


/* Very small mobile */
@media (max-width: 380px) {

    .site-logo img {
        max-width: 155px;
        max-height: 54px;
    }

    .nav-toggle {
        width: 44px;
        height: 44px;
    }

    .nav-toggle-line {
        left: 8px;
    }
}


/* Reduced motion */
@media (prefers-reduced-motion: reduce) {

    .nav-menu,
    .nav-link,
    .nav-link::after,
    .nav-toggle-line,
    .nav-cta .btn::after {
        transition: none;
    }
}