/* Advanced Header Styles */
.sf-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 2rem;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    background: rgba(15, 15, 31, 0.1);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
}

/* Sticky state when scrolled */
.sf-header.scrolled {
    padding: 1rem 2rem;
    background: rgba(15, 15, 31, 0.95);
    backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
}

/* Hide header when scrolling down */
.sf-header.hidden {
    transform: translateY(-100%);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

/* Logo Styles */
.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-link {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-main {
    font-family: var(--english-font);
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
    transition: var(--transition);
}

.logo-link:hover .logo-main {
    transform: scale(1.05);
}

.logo-arabic {
    font-family: var(--arabic-font);
    font-size: 1.5rem;
    color: var(--text);
    writing-mode: vertical-rl;
    text-orientation: mixed;
}

/* Advanced Navigation */
.sf-navigation {
    display: flex;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: 1px;
    position: relative;
    padding: 0.8rem 0;
    transition: var(--transition);
    text-transform: uppercase;
}

.nav-link:before {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    color: var(--accent-light);
    overflow: hidden;
    white-space: nowrap;
    transition: var(--transition);
    transform: scaleX(0);
    transform-origin: right;
}

.nav-link:hover:before {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-link:after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    transition: var(--transition);
}

.nav-link:hover:after,
.nav-link.active:after {
    width: 100%;
}

.nav-link.active {
    color: var(--accent-light);
}

/* Mobile Menu Button - FIXED VISIBILITY */
.mobile-menu-btn {
    display: none;
    cursor: pointer;
    background: black !important;
    backdrop-filter: blur(8px);
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    padding: 10px;
    width: 48px;
    height: 48px;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.hamburger {
    width: 26px;
    height: 18px;
    position: relative;
    cursor: pointer;
}

.hamburger span {
    display: block;
    position: absolute;
    height: 3px;
    width: 100%;
    background: #FFFFFF;
    border-radius: 3px;
    opacity: 1;
    left: 0;
    transform: rotate(0deg);
    transition: 0.3s ease;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hamburger span:nth-child(1) {
    top: 0px;
}

.hamburger span:nth-child(2) {
    top: 7px;
    width: 80%;
}

.hamburger span:nth-child(3) {
    top: 14px;
}

.hamburger.active span:nth-child(1) {
    top: 7px;
    transform: rotate(135deg);
    background: var(--accent-light, #60a5fa);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    left: -60px;
}

.hamburger.active span:nth-child(3) {
    top: 7px;
    transform: rotate(-135deg);
    background: var(--accent-light, #60a5fa);
}

@media (max-width: 1024px) {
    .nav-menu {
        gap: 1.5rem;
    }
}
@media (max-width: 768px) {
    .sf-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: rgba(15, 15, 31, 0.98);
        backdrop-filter: blur(30px);
        transition: var(--transition);
        z-index: 999;
        padding: 6rem 2rem 2rem;
        border-left: 1px solid var(--glass-border);
    }

    .sf-navigation.active {
        right: 0;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-link {
        font-size: 1.2rem;
        padding: 1rem 0;
        color: #FFFFFF; 
    }

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

    .logo-arabic {
        display: none;
    }
    
    .sf-header {
        padding: 1rem;
    }
    
    .sf-header.scrolled {
        padding: 0.8rem 1rem;
    }
}

@media (max-width: 480px) {
    .logo-main {
        font-size: 1.5rem;
    }
    
    .sf-navigation {
        width: 100%;
    }
}