/* CSS Header & Navigation */

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--header-z);
    padding: var(--header-pad-y) var(--header-pad-x);
    transition: background var(--transition-base),
                box-shadow var(--transition-base),
                backdrop-filter var(--transition-base);
}

.header::before {
    content: "";
    position: absolute;
    inset: 8px var(--container-gutter) 0;
    max-width: calc(var(--container-width) + (var(--container-gutter) * 2));
    margin: 0 auto;
    border: 1px solid var(--header-shell-border);
    border-radius: var(--header-shell-radius);
    background: var(--header-shell-bg);
    box-shadow: var(--header-shell-shadow);
    backdrop-filter: blur(18px);
    pointer-events: none;
}

.header-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    min-height: 74px;
    position: relative;
    z-index: 1;
}

.header.scrolled {
    background: transparent;
    box-shadow: none;
    backdrop-filter: none;
}

.header-logo {
    font-size: var(--header-logo-size);
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 1px;
    flex-shrink: 0;
}

.header-logo span {
    color: var(--teal);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--header-nav-gap);
    list-style: none;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    justify-content: center;
    width: max-content;
    max-width: calc(100% - 380px);
}

.header-nav a {
    color: var(--muted);
    text-decoration: none;
    font-size: var(--header-link-size);
    font-weight: 600;
    letter-spacing: var(--header-link-tracking);
    transition: color var(--transition-base), opacity var(--transition-base);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 42px;
    padding: 8px 1px 14px;
}

.header-nav a:hover,
.header-nav a.active,
.header-nav li.current-menu-item > a,
.header-nav li.current-menu-parent > a,
.header-nav li.current-menu-ancestor > a {
    color: var(--teal);
}

/* active underline — fallback nav */
.header-nav li.current-menu-item > a,
.header-nav li.current-menu-parent > a,
.header-nav li.current-menu-ancestor > a {
    font-weight: 600;
    letter-spacing: var(--header-link-tracking);
}

.header-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    width: auto;
    bottom: -6px;
    height: 2px;
    border-radius: 999px;
    background: linear-gradient(90deg, transparent 0%, var(--teal) 24%, var(--cyan) 100%);
    opacity: 0;
    transform: translateY(4px);
    transition: opacity var(--transition-base), transform var(--transition-base);
}

.header-nav a:hover::after,
.header-nav a.active::after,
.header-nav li.current-menu-item > a::after,
.header-nav li.current-menu-parent > a::after,
.header-nav li.current-menu-ancestor > a::after {
    opacity: 1;
    transform: translateY(0);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.lang-switcher,
.mobile-lang-header,
.mobile-lang {
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-switcher .lang-sw,
.mobile-lang-header .lang-sw,
.mobile-lang .lang-sw {
    min-width: 34px;
    height: 32px;
    padding: 0 10px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: rgba(232, 240, 248, 0.76);
    text-decoration: none;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.lang-switcher .lang-sw.active,
.mobile-lang-header .lang-sw.active,
.mobile-lang .lang-sw.active,
.lang-switcher .lang-sw:hover,
.mobile-lang-header .lang-sw:hover,
.mobile-lang .lang-sw:hover {
    color: var(--text);
    border-color: rgba(0, 201, 167, 0.4);
    background: rgba(0, 201, 167, 0.1);
}

.header-cta {
    background: transparent;
    border: 1px solid rgba(0, 201, 167, 0.45);
    color: var(--text);
    padding: var(--header-cta-pad-y) var(--header-cta-pad-x);
    font-size: var(--hero-tag-size);
    font-weight: 600;
    letter-spacing: 0.12em;
    text-decoration: none;
    transition: all var(--transition-base);
    cursor: pointer;
    background: linear-gradient(135deg, rgba(0, 201, 167, 0.18) 0%, rgba(0, 180, 216, 0.1) 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
    border-radius: 10px;
}

.header-cta:hover {
    background: var(--teal);
    color: var(--navy);
}

/* Mobile menu (hidden on desktop) */
.header-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    font-size: 24px;
    padding: 0;
}

.mobile-lang-header,
.mobile-menu {
    display: none;
}

@media (max-width: 1024px) {
    .header-nav {
        position: static;
        left: auto;
        transform: none;
        width: auto;
        max-width: none;
    }

    body.mobile-menu-open .burger,
    body.mobile-menu-open .mobile-lang-header {
        opacity: 0;
        pointer-events: none;
    }

    .header-inner {
        gap: 12px;
        min-height: 64px;
    }

    .header-logo img {
        height: 34px;
    }

    .burger {
        display: block;
        position: relative;
        z-index: calc(var(--header-z) + 2);
        margin-left: 8px;
        width: 44px;
        height: 44px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: 999px;
        background: rgba(255, 255, 255, 0.04);
    }

    .header-right {
        display: none;
    }

    .mobile-lang-header {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
        margin-right: 0;
    }

    .mobile-lang-header .lang-sw {
        min-width: 30px;
        height: 28px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 0 8px;
        border: 1px solid rgba(0, 201, 167, 0.28);
        border-radius: 4px;
        color: rgba(232, 240, 248, 0.68);
        text-decoration: none;
        font-size: 11px;
        font-weight: 600;
        letter-spacing: 0.4px;
        line-height: 1;
        transition: border-color var(--transition-fast),
                    color var(--transition-fast),
                    background var(--transition-fast);
    }

    .mobile-lang-header .lang-sw.active {
        color: var(--teal);
        border-color: var(--teal);
        background: rgba(0, 201, 167, 0.08);
    }

    .header-nav {
        display: none !important;
        position: absolute;
        top: var(--mobile-nav-offset);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: #061220;
        padding: var(--container-gutter);
        border-top: 1px solid var(--card-border);
    }
    
    .header-nav.active,
    .header-nav.open {
        display: flex;
    }
    
    .header-nav a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid var(--card-border);
    }
    
    .header-menu-toggle {
        display: block;
    }

    .mobile-menu {
        display: none !important;
        position: fixed;
        inset: 0;
        width: 100%;
        height: 100dvh;
        flex-direction: column;
        background:
            radial-gradient(circle at top right, rgba(0, 201, 167, 0.14), transparent 34%),
            linear-gradient(180deg, #081424 0%, #061220 100%);
        z-index: calc(var(--header-z) + 1);
        overflow-y: auto;
        padding: 18px var(--container-gutter) 32px;
    }

    .mobile-menu.open {
        display: flex !important;
    }

    .mobile-menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--space-md);
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--card-border);
        position: sticky;
        top: 0;
        z-index: 1;
        background: #061220;
    }

    .mobile-menu-logo {
        display: inline-flex;
        align-items: center;
        text-decoration: none;
        color: var(--text);
        flex-shrink: 0;
    }

    .mobile-menu-logo img {
        display: block;
        width: auto;
        height: 32px;
    }

    .mobile-menu-close {
        width: 44px;
        height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        position: relative;
        border: 1px solid rgba(0, 201, 167, 0.35);
        border-radius: 999px;
        background: transparent;
        color: var(--teal);
        cursor: pointer;
        flex-shrink: 0;
    }

    .mobile-menu-close span {
        position: absolute;
        width: 20px;
        height: 2px;
        top: 50%;
        left: 50%;
        margin-left: -10px;
        margin-top: -1px;
        background: currentColor;
    }

    .mobile-menu-close span:first-child {
        transform: rotate(45deg);
    }

    .mobile-menu-close span:last-child {
        transform: rotate(-45deg);
    }

    .mobile-nav {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .mobile-nav li a,
    .mobile-nav > a {
        display: block;
        padding: 16px 0;
        color: var(--text);
        text-decoration: none;
        border-bottom: 1px solid var(--card-border);
        font-size: 17px;
        letter-spacing: 0.01em;
    }

    .mobile-contact-btn {
        margin-top: 24px;
        align-self: stretch;
    }

    .mobile-lang {
        display: flex;
        margin-top: 18px;
        padding-top: 18px;
        border-top: 1px solid var(--card-border);
    }
    
    .header-cta {
        margin-top: 12px;
        display: block;
        text-align: center;
    }
}