/* ============================================
   Header - Shared Across All Pages
   Industrial procurement navigation
   ============================================ */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid transparent;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 16px 0;
    transition: padding 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled .header-content {
    padding: 10px 0;
}

/* ============================================
   Logo
   ============================================ */
.logo {
    text-decoration: none;
    color: inherit;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.logo-img {
    height: 48px;
    width: auto;
    display: block;
    transition: filter 0.3s ease;
}

/* Dark hero / transparent header: render logo white */
.header:not(.scrolled):not(.header-light) .logo-img {
    filter: brightness(0) invert(1);
}

/* Light header (legal pages, scrolled state): use natural logo color */
.header.scrolled .logo-img,
.header-light .logo-img {
    filter: none;
}

.logo-text {
    font-size: 1.18rem;
    font-weight: 800;
    color: #ffffff;
    margin: 0;
    letter-spacing: -0.4px;
    line-height: 1.05;
    transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.logo-text-sub {
    display: block;
    font-size: 0.64rem;
    font-weight: 600;
    letter-spacing: 1.4px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    margin-top: 3px;
}

.header.scrolled .logo-text,
.header-light .logo-text {
    color: var(--primary-color, #0F1A2E);
}

.header.scrolled .logo-text-sub,
.header-light .logo-text-sub {
    color: var(--text-secondary, #4B5563);
}

.logo:hover .logo-text {
    color: var(--accent-color, #0066FF);
}

/* ============================================
   Desktop Navigation
   ============================================ */
.nav {
    display: flex;
    gap: 4px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.78);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 10px 14px;
    border-radius: 8px;
    transition: color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.2px;
    position: relative;
}

/* Animated underline — grows from the center on hover, full-width on active */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    width: calc(100% - 24px);
    height: 2px;
    background-color: var(--accent-color, #0066FF);
    border-radius: 2px;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.08);
}

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

.nav-link.active,
.nav-link[aria-current="page"] {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.12);
}

.nav-link.active::after,
.nav-link[aria-current="page"]::after {
    transform: translateX(-50%) scaleX(1);
}

/* Request a Quote CTA — pill button, no underline */
.nav-link-cta {
    background-color: var(--accent-color, #0066FF);
    color: #ffffff !important;
    padding: 11px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 0.88rem;
    margin-left: 8px;
    box-shadow: 0 4px 14px rgba(0, 102, 255, 0.30);
}

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

.nav-link-cta:hover {
    background-color: var(--accent-hover, #0052CC) !important;
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(0, 102, 255, 0.40);
}

.nav-link-cta.active {
    background-color: var(--accent-hover, #0052CC);
    color: #ffffff !important;
}

/* ============================================
   Scrolled state (solid white background)
   ============================================ */
.header.scrolled {
    background-color: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px) saturate(160%);
    -webkit-backdrop-filter: blur(20px) saturate(160%);
    border-bottom: 1px solid #E5E7EB;
    box-shadow: 0 1px 3px rgba(15, 26, 46, 0.04), 0 1px 2px rgba(15, 26, 46, 0.06);
}

.header.scrolled .nav-link {
    color: var(--text-secondary, #4B5563);
}

.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active,
.header.scrolled .nav-link[aria-current="page"] {
    color: var(--primary-color, #0F1A2E);
    background-color: var(--bg-secondary, #F8FAFC);
}

.header.scrolled .nav-link-cta,
.header.scrolled .nav-link-cta:hover {
    color: #ffffff !important;
}

/* ============================================
   Light header (for pages without hero)
   ============================================ */
.header-light {
    background-color: #ffffff;
    border-bottom: 1px solid #E5E7EB;
    box-shadow: 0 1px 3px rgba(15, 26, 46, 0.04), 0 1px 2px rgba(15, 26, 46, 0.06);
}

.header-light .nav-link {
    color: var(--text-secondary, #4B5563);
}

.header-light .nav-link:hover,
.header-light .nav-link.active,
.header-light .nav-link[aria-current="page"] {
    color: var(--primary-color, #0F1A2E);
    background-color: var(--bg-secondary, #F8FAFC);
}

/* ============================================
   Mobile Hamburger Menu
   ============================================ */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: 1px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.menu-toggle-bar {
    display: block;
    width: 22px;
    height: 2px;
    background-color: #ffffff;
    border-radius: 2px;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.25s ease,
                background-color 0.3s ease;
}

.header.scrolled .menu-toggle-bar,
.header-light .menu-toggle-bar {
    background-color: var(--primary-color, #0F1A2E);
}

.menu-toggle:hover,
.menu-toggle:focus-visible {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.18);
    outline: none;
}

.header.scrolled .menu-toggle:hover,
.header.scrolled .menu-toggle:focus-visible,
.header-light .menu-toggle:hover,
.header-light .menu-toggle:focus-visible {
    background-color: var(--bg-secondary, #F8FAFC);
    border-color: var(--border-color, #E5E7EB);
}

.menu-toggle:focus-visible {
    outline: 2px solid var(--accent-color, #0066FF);
    outline-offset: 2px;
}

/* Active (X) state */
.menu-toggle.active .menu-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle.active .menu-toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0.2);
}

.menu-toggle.active .menu-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.header.scrolled .menu-toggle.active .menu-toggle-bar,
.header-light .menu-toggle.active .menu-toggle-bar {
    background-color: var(--primary-color, #0F1A2E);
}

/* Mobile nav drawer */
.nav-mobile {
    position: fixed;
    top: 0;
    right: 0;
    width: min(86vw, 380px);
    height: 100vh;
    height: 100svh;
    background-color: #ffffff;
    box-shadow: -20px 0 60px rgba(15, 26, 46, 0.18);
    transform: translateX(100%);
    transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    padding: calc(var(--header-height, 72px) + 16px) 24px 24px;
    overflow-y: auto;
    visibility: hidden;
}

.nav-mobile.open {
    transform: translateX(0);
    visibility: visible;
}

.nav-mobile-link {
    display: block;
    text-decoration: none;
    color: var(--primary-color, #0F1A2E);
    font-size: 1.05rem;
    font-weight: 600;
    padding: 16px 18px;
    border-radius: 10px;
    margin-bottom: 4px;
    transition: background-color 0.25s ease, color 0.25s ease;
    border: 1px solid transparent;
}

.nav-mobile-link:hover,
.nav-mobile-link:focus-visible,
.nav-mobile-link.active,
.nav-mobile-link[aria-current="page"] {
    background-color: var(--bg-secondary, #F8FAFC);
    border-color: var(--border-color, #E5E7EB);
    outline: none;
}

.nav-mobile-link:focus-visible {
    box-shadow: 0 0 0 2px var(--accent-color, #0066FF) inset;
}

.nav-mobile-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-color, #0066FF);
    color: #ffffff !important;
    padding: 15px 22px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    margin-top: 16px;
    box-shadow: 0 6px 18px rgba(0, 102, 255, 0.30);
}

.nav-mobile-cta:hover,
.nav-mobile-cta:focus-visible {
    background-color: var(--accent-hover, #0052CC);
    transform: translateY(-1px);
    outline: none;
}

.nav-mobile-cta:focus-visible {
    box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.35);
}

.nav-mobile-close-text {
    text-align: center;
    margin-top: auto;
    padding-top: 24px;
    font-size: 0.78rem;
    color: var(--text-light, #9CA3AF);
    letter-spacing: 0.4px;
}

/* Scrim behind drawer */
.nav-mobile-scrim {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 26, 46, 0.42);
    backdrop-filter: blur(2px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.32s ease, visibility 0.32s ease;
    z-index: 1000;
}

.nav-mobile-scrim.open {
    opacity: 1;
    visibility: visible;
}

/* Lock body scroll when drawer is open */
body.nav-open {
    overflow: hidden;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1080px) {
    /* Hide the full desktop nav where a hamburger exists (home page).
       The home nav now includes Certifications, so we switch to the drawer
       earlier to avoid overflow on tablets/small laptops. */
    .header:not(.header-light) .nav {
        display: none;
    }

    .header:not(.header-light) .menu-toggle {
        display: flex;
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 12px 0;
        gap: 12px;
    }

    .header.scrolled .header-content,
    .header-light .header-content {
        padding: 10px 0;
    }

    .logo-img {
        height: 40px;
    }

    .logo-text {
        font-size: 1.05rem;
    }

    .logo-text-sub {
        display: none;
    }

    .nav-mobile {
        padding-top: calc(var(--header-height, 72px) + 8px);
    }

    /* Legal pages: condense the 2-link nav for small screens */
    .header-light .nav {
        gap: 2px;
    }

    .header-light .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .header-light .nav-link-cta {
        padding: 9px 16px;
        font-size: 0.82rem;
        margin-left: 4px;
    }

    /* Content pages: switch to the hamburger drawer on phones */
    .header-light .nav {
        display: none;
    }

    .header-light .menu-toggle {
        display: flex;
    }
}

@media (max-width: 480px) {
    .nav-mobile {
        width: 100vw;
    }
}

/* ============================================
   Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    .header,
    .header-content,
    .nav-link,
    .nav-link-cta,
    .logo-text,
    .logo-img,
    .menu-toggle,
    .menu-toggle-bar,
    .nav-mobile,
    .nav-mobile-scrim {
        transition-duration: 0.01ms !important;
    }
}