:root {
    --header-h: 72px;
    --nav-gap: 28px;
    --transition-fast: 180ms;
    --transition-slow: 320ms;

    --z-header: 4000; /* header above everything */
    --z-mobile-nav: 3000; /* mobile menu below header */
    --z-dropdown: 4100; /* dropdown above header content */
}

/* Reset */
* {
    box-sizing: border-box;
}

html {
    scroll-padding-top: var(--header-h);
}

/* HEADER */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: var(--color-blue);
    z-index: var(--z-header);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
    pointer-events: auto;
    opacity: 0;
    transform: none;
}

/* inner layout */
.header-inner {
    margin: 0 auto;
    height: var(--header-h);
    background: var(--color-blue);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 0 20px;
    position: relative;
}

/* LOGO (left on desktop; centered on mobile via absolute) */
.logo-small {
    justify-self: start;
    display: flex;
    align-items: center;
    height: 100%;
    z-index: var(--z-header);
}
.logo-small a {
    display: inline-flex;
    align-items: center;
    height: 100%;
}
.logo-small img {
    height: 44px;
    display: block;
}

/* NAV center (desktop) */
.desktop-nav {
    justify-self: center;
    align-self: center;
}
.desktop-nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: var(--nav-gap);
    align-items: center;
}
.desktop-nav a {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    padding: 6px 4px;
    transition: color var(--transition-fast), transform var(--transition-fast);
}
.desktop-nav a:hover {
    color: var(--color-accent);
    transform: translateY(-2px);
}

/* RIGHT CONTROLS */
.right-controls {
    display: flex;
    gap: 10px;
    align-items: center;
    justify-self: end;
    height: 100%;
    position: relative;
    z-index: var(--z-header);
}

/* LANG desktop style */
.custom-dropdown {
    position: relative;
    display: flex;
    align-items: center;
    z-index: var(--z-dropdown);
}
.custom-dropdown .dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 10px;
    border: 1px solid #fff;
    background: var(--color-white);
    cursor: pointer;
    font-weight: 600;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.custom-dropdown .dropdown-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(250, 250, 250, 0.95));
}
.custom-dropdown .dropdown-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    list-style: none;
    margin: 0;
    padding: 6px 0;
    border-radius: 10px;
    background: #fff;
    min-width: 180px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    transform-origin: top right;
    transform: scaleY(0);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-slow) cubic-bezier(0.2, 0.9, 0.2, 1), opacity var(--transition-fast);
    z-index: var(--z-dropdown);
}
.custom-dropdown .dropdown-menu.open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
}
.custom-dropdown .dropdown-menu li {
    padding: 10px 14px;
    cursor: pointer;
    white-space: nowrap;
    font-weight: 600;
}
.custom-dropdown .dropdown-menu li:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--color-accent);
}

/* BASE HAMBURGER */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
}
.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* transform into X */
.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
    opacity: 0;
}
.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* MOBILE NAV */
.mobile-nav {
    position: fixed;
    left: 0;
    right: 0;
    top: var(--header-h);
    transform: translateY(-120%);
    transition: transform var(--transition-slow) cubic-bezier(0.2, 0.9, 0.2, 1), opacity var(--transition-fast);
    z-index: var(--z-mobile-nav);
    background: var(--color-blue);
    padding-top: 0;
    pointer-events: none;
    opacity: 0;
    overflow: visible;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
}
.mobile-nav.open {
    transform: translateY(0);
    pointer-events: auto;
    opacity: 1;
}
.mobile-nav > ul {
    margin: 0;
    padding: 18px 20px 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}
.mobile-nav a {
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    font-size: 1.05rem;
    padding-bottom: 6px;
}

/* mobile language pills */
.mobile-lang {
    padding: 14px 20px 18px;
    border-top: 1px solid rgba(0, 0, 0, 0.04);
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
    color: #fff;
}
.mobile-lang button {
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid #fff;
    background: transparent;
    font-weight: 700;
    cursor: pointer;
}
.mobile-lang button.active {
    background: var(--color-accent);
    color: #fff;
    border-color: transparent;
}

/* RESPONSIVE rules */
@media (max-width: 1000px) {
    .desktop-nav,
    .custom-dropdown {
        display: none;
    }

    .hamburger {
        display: flex !important;
        grid-column: 3;
        justify-self: end;
        margin-left: auto;
        z-index: var(--z-header);
    }

    .hamburger span {
        width: 24px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: transform var(--transition-fast), opacity var(--transition-fast);
    }

    .logo-small {
        position: relative;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        height: var(--header-h);
        z-index: var(--z-header);
        pointer-events: none;
        grid-column: 2;
    }

    .logo-small a {
        pointer-events: auto;
    }
}
@media (min-width: 1001px) {
    .mobile-nav {
        display: none;
    }
    .hamburger {
        display: none !important;
    }
}