/* ── Header ──────────────────────────────────────────────────────── */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 99999;
    background: hsla(0, 0%, 100%, 0.95);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border-bottom: 1px solid hsla(200, 30%, 15%, 0.08);
    box-shadow: 0 1px 3px hsla(200, 30%, 15%, 0.05);
    transition: transform var(--transition),
        box-shadow var(--transition);
}

/* ── Scroll Hide / Show ──────────────────────────────────────────── */
.scroll-down header {
    transform: translateY(-100%);
}

.scroll-up header {
    transform: translateY(0);
    box-shadow: 0 2px 8px hsla(200, 30%, 15%, 0.08);
}

/* ── Inner Layout ────────────────────────────────────────────────── */
header .inner {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 32px;
}

header .inner.flex {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    transition: height var(--transition);
}

.scroll-up header .inner.flex {
    height: 65px;
}

/* ── Logo ─────────────────────────────────────────────────────────── */
header .logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform var(--transition);
}

header .logo:hover {
    transform: scale(1.05);
}

header .logo img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 50%;
    box-shadow: 0 2px 8px hsla(200, 30%, 15%, 0.1);
    border: 2px solid white;
    background: white;
    padding: 2px;
    transition: var(--transition);
}

header .logo:hover img {
    border-color: var(--ocean-primary);
    box-shadow: 0 2px 12px hsla(185, 55%, 42%, 0.3);
}

/* ── Hamburger (Mobile Toggle) ────────────────────────────────────── */
.hamburger {
    display: none;
    /* Hidden on desktop */
    cursor: pointer;
    background: transparent;
    border: none;
    outline: none;
    z-index: 100000;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    margin: 5px 0;
    transition: all 0.3s ease;
    border-radius: 4px;
}

/* Hamburger Animation */
.hamburger.toggle span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
    background-color: var(--ocean-primary);
}

.hamburger.toggle span:nth-child(2) {
    opacity: 0;
}

.hamburger.toggle span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
    background-color: var(--ocean-primary);
}

/* ── Navigation ──────────────────────────────────────────────────── */
header nav {
    display: flex;
    align-items: center;
    gap: 20px;
}

header nav ul {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

header nav ul li a {
    display: inline-block;
    text-decoration: none;
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 100px;
    transition: var(--transition);
    position: relative;
}

header nav ul li a:hover {
    color: var(--ocean-primary);
    background: hsla(185, 55%, 42%, 0.08);
}

/* Active "Home" link */
header nav ul li.home a {
    background: var(--ocean-primary);
    color: white;
    box-shadow: 0 2px 8px hsla(185, 55%, 42%, 0.25);
}

header nav ul li.home a:hover {
    background: var(--ocean-deep);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px hsla(185, 55%, 42%, 0.3);
}

/* ── Language Switcher ─────────────────────────────────────────────── */
.nav-language {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    padding-left: 16px;
    border-left: 1px solid hsla(200, 30%, 15%, 0.12);
}

.nav-language a {
    text-decoration: none;
    color: var(--text-muted);
    transition: var(--transition-fast);
    padding: 4px 8px;
    border-radius: 4px;
}

.nav-language a.active {
    color: var(--ocean-primary);
    font-weight: 700;
}

.nav-language a:hover {
    color: var(--ocean-primary);
    background: hsla(185, 55%, 42%, 0.06);
}

.nav-separator {
    opacity: 0.4;
}

/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE DESIGN
   ══════════════════════════════════════════════════════════════════ */

@media screen and (max-width: 900px) {
    header .inner {
        padding: 0 24px;
    }

    /* Show Hamburger */
    .hamburger {
        display: block;
    }

    /* Hide Navigation by default */
    header nav {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transform: translateX(100%);
        transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        z-index: 99998;
        backdrop-filter: blur(15px);
        -webkit-backdrop-filter: blur(15px);
    }

    /* Show Navigation when active */
    header nav.nav-active {
        transform: translateX(0%);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.1);
    }

    /* Stack list items */
    header nav ul {
        flex-direction: column;
        gap: 32px;
        text-align: center;
    }

    header nav ul li a {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--text-dark);
    }

    header nav ul li a:hover {
        color: var(--ocean-primary);
        background: transparent;
    }

    /* Language Switcher in Mobile menu */
    .nav-language {
        margin-top: 40px;
        padding-left: 0;
        border-left: none;
        font-size: 1.1rem;
        gap: 16px;
    }

    .nav-language a {
        padding: 8px 16px;
        background: hsla(200, 30%, 15%, 0.05);
        border-radius: 8px;
    }
}