/* ============================================
   HEADER & NAVIGATION STYLES - INDUSTRIAL THEME
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-white);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all var(--transition-base);
}

.header.scrolled {
    box-shadow: var(--shadow-lg);
    background: rgba(255, 255, 255, 0.98);
}

.header-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-charcoal);
    white-space: nowrap;
    flex-shrink: 0;
    text-decoration: none;
}

.logo-image {
    height: 45px;
    width: auto;
    object-fit: contain;
    display: block;
}

/* Desktop Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
    justify-content: flex-end;
}

.nav-link {
    font-weight: 500;
    font-size: var(--font-size-sm);
    color: var(--color-charcoal);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    position: relative;
    white-space: nowrap;
    text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-blue);
    background: rgba(0, 174, 239, 0.08);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 70%;
    height: 2px;
    background: var(--color-blue);
    transition: transform var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* Dropdown Menu */
.nav-item {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 5px);
    left: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    border: 1px solid var(--color-light-grey);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-charcoal);
    transition: all var(--transition-fast);
    font-size: var(--font-size-base);
}

.dropdown-link:hover {
    background: rgba(0, 174, 239, 0.08);
    color: var(--color-blue);
    padding-left: calc(var(--spacing-lg) + 5px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--color-charcoal);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* CTA Button in Header */
.header-cta {
    margin-left: var(--spacing-xs);
    flex-shrink: 0;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Responsive */
@media (max-width: 968px) {
    .header-container {
        padding: 0 var(--spacing-md);
    }

    .logo {
        font-size: var(--font-size-lg);
    }

    .logo-image {
        height: 35px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--color-white);
        box-shadow: var(--shadow-xl);
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-in-out;
        z-index: 999;
    }

    .nav.active {
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }

    .nav-item {
        border-bottom: 1px solid var(--color-light-grey);
    }

    .nav-link {
        padding: var(--spacing-md) var(--spacing-lg);
        display: block;
        border-radius: 0;
    }

    .nav-link::after {
        display: none;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #F8F9FA;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-in-out;
        border: none;
        padding: 0;
    }

    .nav-item.active .dropdown-menu {
        max-height: 400px;
        padding: var(--spacing-sm) 0;
    }

    .dropdown-link {
        padding: var(--spacing-sm) var(--spacing-xl);
    }

    .header-cta {
        margin: var(--spacing-md) var(--spacing-lg);
        display: block;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .logo span {
        font-size: var(--font-size-base);
    }

    .logo-image {
        height: 30px;
    }

    .header-container {
        padding: 0 var(--spacing-sm);
    }
}