/* Header Styles - Bechtel-inspired Design */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.site-header.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    max-width: 1400px;
    margin: 0 auto;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    z-index: 1001;
}

.logo-img {
    height: 40px; /* Standardize desktop size to be slightly larger and consistent */
    width: auto;
    transition: all 0.3s ease;
    /* NO FILTER - Show actual logo colors (blue #004E92 and orange #FF8C1A) */
}

.site-header.scrolled .logo-img {
    height: 40px; /* No shrinking on scroll */
}

.logo:hover {
    opacity: 0.8;
}

/* Navigation Links */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 45px;
    list-style: none;
    margin: 0;
    padding: 0;
    align-items: center;
}


.nav-link {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-dark);
    position: relative;
    padding: 8px 0;
    opacity: 0.75;
    transition: all 0.3s ease;
    text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
    opacity: 1;
    color: var(--color-primary);
}

/* Underline Effect */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.3s ease;
}

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

/* Contact Button in Nav */
.btn-contact {
    padding: 10px 24px;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: 6px;
    transition: all 0.3s ease;
    opacity: 1;
    font-weight: 700;
}

.btn-contact::after {
    display: none;
}

.btn-contact:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 78, 146, 0.3);
}


.btn-contact::after {
    display: none; /* Remove underline for button */
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    font-size: 1.8rem;
    color: var(--color-primary);
    cursor: pointer;
    z-index: 1005; /* Higher than nav */
    position: relative; /* Ensure z-index works */
    padding: 5px; /* Increase touch area */
    transition: all 0.3s ease;
}

.mobile-toggle.active {
    color: var(--color-primary); /* Primary blue to contrast with white logo bar */
    transform: rotate(90deg);
}

/* Dropdown Navigation (Desktop) */
.dropdown {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.dropdown > .nav-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.dropdown > .nav-link i {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.dropdown:hover > .nav-link i {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    min-width: 260px;
    padding: 8px 0;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1002;
    border: 1px solid rgba(255, 255, 255, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-item {
    padding: 12px 24px;
    color: var(--color-text-dark);
    text-decoration: none;
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all 0.2s ease;
    border-bottom: none;
    position: relative;
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    color: var(--color-text-muted);
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.dropdown-item:hover {
    background: rgba(0, 78, 146, 0.04);
    color: var(--color-primary);
    padding-left: 28px;
}

.dropdown-item:hover i {
    color: var(--color-primary);
    transform: scale(1.1);
}

.dropdown-item.active-dropdown-item {
    background: rgba(0, 78, 146, 0.08);
    color: var(--color-primary);
    font-weight: 700;
    padding-left: 28px;
}

.dropdown-item.active-dropdown-item i {
    color: var(--color-primary);
    transform: scale(1.1);
}

.dropdown-header {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    font-weight: 700;
    padding: 16px 24px 8px;
    letter-spacing: 0.05em;
    background: transparent;
}

.dropdown-divider {
    height: 1px;
    background: rgba(0,0,0,0.06);
    margin: 8px 0;
}


/* Mobile Menu Logo Default */
.mobile-menu-logo {
    display: none;
}

/* Mobile Responsive Menu - Full Screen Overlay */
@media (max-width: 992px) {
    .mobile-toggle {
        display: block;
        z-index: 2002; /* Ensure strictly above everything, including the logo bar */
    }

    /* Header Inner adjustments for mobile */
    .header-inner {
        padding: 12px 15px; /* Reduced padding */
    }

/* Logo adjustments for mobile */
    .logo-img {
        height: 30px; /* Consistent mobile size */
    }

    /* Mobile Menu Logo */
    .mobile-menu-logo {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        padding: 15px 0; /* Reduced padding */
        background: white;
        position: absolute;
        top: 0;
        left: 0;
        z-index: 2001;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }

    .mobile-menu-logo img {
        height: 30px; /* Match header logo */
        width: auto;
    }

    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: var(--color-bg-dark, #0a192f); /* Fallback to dark navy */
        display: flex;
        flex-direction: column;
        justify-content: flex-start; /* Changed from center to allow scrolling */
        align-items: center;
        z-index: 1999; /* Just below toggle */
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 100px 20px 80px; /* Increased bottom padding for scrolling space */
        overflow-y: auto; /* Enable vertical scrolling */
        -webkit-overflow-scrolling: touch; /* Smooth scrolling on iOS */
    }

    .main-nav.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-list {
        flex-direction: column;
        gap: 25px;
        width: 100%;
        text-align: center;
    }

    .nav-link {
        font-size: 1.5rem;
        color: rgba(255, 255, 255, 0.9);
        font-weight: 700;
        display: inline-block;
    }

    .nav-link.active, .nav-link:hover {
        color: var(--construction-orange, #ff8c00);
    }

    /* Mobile Dropdown Handling */
    .dropdown {
        flex-direction: column;
        width: 100%;
    }

    .dropdown-menu {
        position: static;
        width: 100%;
        background: rgba(255, 255, 255, 0.05); /* Slight transparent bg */
        box-shadow: none;
        border: none;
        padding: 10px 0;
        display: none; /* Hidden by default */
        opacity: 1 !important; /* Force opacity to fix animation stack */
        visibility: visible !important;
        transform: none !important;
        margin-top: 10px;
        border-radius: 8px;
        transition: none !important; /* Remove animation */
    }

    /* Disable desktop hover behavior entirely on mobile */
    .dropdown:hover .dropdown-menu {
        transform: none;
        opacity: 1;
        visibility: visible;
    }

    /* Explicitly hide unless active class is present */
    .dropdown:not(.active) .dropdown-menu {
        display: none !important;
    }

    .btn-contact {
        margin-top: 20px;
        width: auto; /* Allow auto width */
        min-width: 140px; /* Minimum width */
        display: inline-block; /* Inline block */
        padding: 10px 20px; /* Reduced padding */
        font-size: 0.9rem; /* Smaller font */
    }
    
    /* Ensure dropdowns are visible when active */
    .dropdown.active .dropdown-menu {
        display: flex;
        flex-direction: column;
        gap: 5px;
        padding: 10px 0;
        margin-top: 5px;
        background: rgba(255, 255, 255, 0.08); /* Slightly more visible bg */
        border-radius: 8px;
    }

    .dropdown-item {
        color: rgba(255, 255, 255, 0.8);
        padding: 10px 15px;
        font-size: 1rem;
    }

    .dropdown-item.active-dropdown-item {
        color: var(--construction-orange, #ff8c00);
        background: rgba(255, 255, 255, 0.1);
    }
    
    .dropdown-item.active-dropdown-item i {
        color: var(--construction-orange, #ff8c00);
    }
}