/* =========================================================
   NATIONAL LUBE — brand tokens
   Industrial lubricant manufacturer: ink-dark machine housing,
   oil-amber, and the ember-orange from the flame in the mark.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@500;600;700&family=Work+Sans:wght@400;500;600&family=IBM+Plex+Mono:wght@500;600&display=swap');

:root {
    --ink: #14181A;
    --ink-soft: #1F2528;
    --ink-line: #2C3336;
    --amber: #C17817;
    --amber-light: #E0A340;
    --ember: #D64520;
    --steel: #8B96A0;
    --steel-light: #E4E7E9;
    --paper: #F5F6F4;
    --white: #FFFFFF;
    --font-display: 'Oswald', sans-serif;
    --font-body: 'Work Sans', sans-serif;
    --font-mono: 'IBM Plex Mono', monospace;
}

body {
    font-family: var(--font-body);
    color: var(--ink);
    background: var(--white);
}

h1, h2, h3, h4, h5, .navbar-brand .brand-text h3 {
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    color: var(--ink);
}

/* -------------------------------------------------------
   Navbar
   ------------------------------------------------------- */
.top-header {
    background: var(--ink) !important;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

.navbar {
    padding: 0.65rem 0;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0;
}

.logo-img {
    height: 52px;
    width: auto;
    object-fit: contain;
}

.brand-text h3 {
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.05;
    color: var(--ink);
}

.brand-text p {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--amber);
}

.navbar-nav .nav-link {
    font-family: var(--font-display);
    font-size: 0.9rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    color: var(--ink-soft);
    padding: 0.5rem 1rem !important;
}

    .navbar-nav .nav-link:hover,
    .navbar-nav .nav-link.active {
        color: var(--ember);
    }

.btn-warning {
    background: var(--ember) !important;
    border-color: var(--ember) !important;
    color: var(--white) !important;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.85rem;
    padding: 0.55rem 1.3rem;
    border-radius: 2px;
}

    .btn-warning:hover {
        background: #B93A1B !important;
        border-color: #B93A1B !important;
    }

@media (max-width: 576px) {
    .logo-img {
        height: 38px;
    }

    .brand-text h3 {
        font-size: 1rem;
    }

    .brand-text p {
        font-size: 0.55rem;
    }
}

/* -------------------------------------------------------
   Hero / carousel
   ------------------------------------------------------- */
#homeCarousel {
    position: relative;
    background: var(--ink);
}

.banner-img {
    width: 100%;
    height: 68vh;
    min-height: 420px;
    object-fit: cover;
    filter: brightness(0.55) saturate(1.1);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    z-index: 5;
    pointer-events: none;
}

    .hero-overlay .container {
        pointer-events: auto;
    }

.hero-grade-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--amber-light);
    border: 1px solid var(--amber-light);
    padding: 0.3rem 0.75rem;
    border-radius: 2px;
    margin-bottom: 1rem;
}

.hero-overlay h1 {
    color: var(--white);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    line-height: 1.05;
    max-width: 620px;
}

.hero-overlay p {
    color: var(--steel-light);
    font-family: var(--font-body);
    font-size: 1.05rem;
    max-width: 480px;
    margin-top: 1rem;
}

.hero-overlay .btn-ember {
    background: var(--ember);
    color: var(--white);
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.7rem 1.6rem;
    border-radius: 2px;
    display: inline-block;
    margin-top: 1.5rem;
    text-decoration: none;
}

    .hero-overlay .btn-ember:hover {
        background: #B93A1B;
        color: var(--white);
    }

.carousel-indicators [data-bs-target] {
    background-color: var(--amber-light);
}

/* -------------------------------------------------------
   Section scaffolding
   ------------------------------------------------------- */
.section-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--amber);
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: clamp(1.7rem, 3vw, 2.4rem);
    margin-bottom: 0.5rem;
}

.section-sub {
    color: var(--steel);
    font-family: var(--font-body);
    max-width: 560px;
}

/* -------------------------------------------------------
   Product grade cards
   ------------------------------------------------------- */
.grade-card {
    background: var(--white);
    border: 1px solid var(--steel-light);
    border-radius: 3px;
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    height: 100%;
}

    .grade-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 16px 32px rgba(20, 24, 26, 0.12);
    }

    .grade-card .grade-media {
        height: 170px;
        overflow: hidden;
        position: relative;
    }

        .grade-card .grade-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

.grade-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--ink);
    color: var(--amber-light);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.6rem;
    border-radius: 2px;
}

.grade-card .grade-body {
    padding: 1.25rem 1.4rem 1.5rem;
}

.grade-card h5 {
    font-size: 1.05rem;
    margin-bottom: 0.35rem;
}

.grade-card p {
    color: var(--steel);
    font-size: 0.88rem;
    margin-bottom: 0;
}

/* -------------------------------------------------------
   About
   ------------------------------------------------------- */
.about-media {
    position: relative;
    border-radius: 3px;
    overflow: hidden;
}

    .about-media img {
        width: 100%;
        height: 420px;
        object-fit: cover;
        display: block;
    }

    .about-media::after {
        content: "";
        position: absolute;
        inset: 0;
        border: 10px solid var(--ink);
        opacity: 0.9;
        pointer-events: none;
    }

.btn-primary {
    background: var(--ink) !important;
    border-color: var(--ink) !important;
    font-family: var(--font-display);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-size: 0.85rem;
    border-radius: 2px;
    padding: 0.65rem 1.5rem;
}

    .btn-primary:hover {
        background: var(--ember) !important;
        border-color: var(--ember) !important;
    }

/* -------------------------------------------------------
   Why choose us
   ------------------------------------------------------- */
.why-item {
    padding: 1.5rem 1rem;
}

    .why-item .why-icon {
        width: 64px;
        height: 64px;
        margin: 0 auto 1rem;
        border-radius: 50%;
        background: var(--paper);
        border: 1px solid var(--steel-light);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        color: var(--ember);
    }

    .why-item h5 {
        font-size: 0.95rem;
        letter-spacing: 0.03em;
    }

/* -------------------------------------------------------
   Statistics — dipstick fill-line motif
   ------------------------------------------------------- */
.stats-section {
    background: var(--ink);
    position: relative;
}

.dipstick {
    width: 3px;
    height: 46px;
    background: var(--ink-line);
    margin: 0 auto 0.9rem;
    position: relative;
    border-radius: 2px;
    overflow: hidden;
}

    .dipstick::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: var(--fill, 70%);
        background: linear-gradient(180deg, var(--amber-light), var(--ember));
    }

.stat-block h2 {
    color: var(--white);
    font-size: 2.2rem;
    margin-bottom: 0.2rem;
}

.stat-block p {
    color: var(--steel);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 0;
}

/* -------------------------------------------------------
   Dealer CTA
   ------------------------------------------------------- */
.dealer-cta {
    background: var(--paper) !important;
    border-top: 1px solid var(--steel-light);
    border-bottom: 1px solid var(--steel-light);
}

    .dealer-cta .btn-dark {
        background: var(--ink) !important;
        border-color: var(--ink) !important;
        font-family: var(--font-display);
        text-transform: uppercase;
        letter-spacing: 0.04em;
        border-radius: 2px;
    }

        .dealer-cta .btn-dark:hover {
            background: var(--ember) !important;
            border-color: var(--ember) !important;
        }

/* =========================================================
   Products page
   ========================================================= */
.products-hero {
    background: var(--ink);
    padding: 3.5rem 0 2.5rem;
}

    .products-hero .section-eyebrow {
        color: var(--amber-light);
    }

    .products-hero h1 {
        color: var(--white);
        font-size: clamp(2rem, 4vw, 2.8rem);
        margin-bottom: 0.5rem;
    }

    .products-hero p {
        color: var(--steel);
        max-width: 560px;
    }

.products-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 2.5rem;
    align-items: start;
}

@media (max-width: 767px) {
    .products-layout {
        grid-template-columns: 1fr;
    }
}

.product-sidebar {
    background: var(--paper);
    border: 1px solid var(--steel-light);
    border-radius: 3px;
    padding: 1.5rem;
    position: sticky;
    top: 100px;
}

    .product-sidebar h2 {
        font-size: 0.85rem;
        letter-spacing: 0.1em;
        color: var(--ink);
        margin-bottom: 1rem;
        border-bottom: 2px solid var(--ember);
        padding-bottom: 0.6rem;
    }

    .product-sidebar ul {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    .product-sidebar li {
        border-bottom: 1px solid var(--steel-light);
    }

        .product-sidebar li:last-child {
            border-bottom: none;
        }

    .product-sidebar a {
        display: block;
        padding: 0.65rem 0.2rem;
        font-family: var(--font-body);
        font-size: 0.9rem;
        color: var(--ink-soft);
        text-decoration: none;
        transition: color 0.15s ease, padding-left 0.15s ease;
    }

        .product-sidebar a:hover,
        .product-sidebar a.active {
            color: var(--ember);
            padding-left: 0.5rem;
        }

.product-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 991px) {
    .product-gallery {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .product-gallery {
        grid-template-columns: 1fr;
    }
}

/* Applications */
.applications-section {
    background: var(--paper);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

@media (max-width: 767px) {
    .applications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.application-group h5 {
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    color: var(--ember);
    margin-bottom: 0.9rem;
    border-bottom: 1px solid var(--steel-light);
    padding-bottom: 0.5rem;
}

.application-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.application-group li {
    margin-bottom: 0.55rem;
}

.application-group a {
    font-size: 0.88rem;
    color: var(--ink-soft);
    text-decoration: none;
}

    .application-group a:hover {
        color: var(--ember);
    }

/* =========================================================
   Product detail page
   ========================================================= */
.pd-breadcrumb {
    background: var(--paper);
    border-bottom: 1px solid var(--steel-light);
    padding: 0.85rem 0;
}

    .pd-breadcrumb a {
        color: var(--steel);
        text-decoration: none;
        font-family: var(--font-mono);
        font-size: 0.78rem;
        letter-spacing: 0.03em;
    }

        .pd-breadcrumb a:hover {
            color: var(--ember);
        }

    .pd-breadcrumb .sep {
        color: var(--steel-light);
        margin: 0 0.5rem;
    }

    .pd-breadcrumb .current {
        color: var(--ink);
        font-family: var(--font-mono);
        font-size: 0.78rem;
    }

.pd-hero {
    padding: 3rem 0;
}

.pd-media {
    background: var(--paper);
    border: 1px solid var(--steel-light);
    border-radius: 3px;
    padding: 2rem;
    position: relative;
}

    .pd-media img {
        width: 100%;
        height: auto;
        display: block;
    }

.pd-category {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--steel);
    margin-bottom: 0.5rem;
    display: block;
}

.pd-grade-badge {
    display: inline-block;
    background: var(--ink);
    color: var(--amber-light);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    padding: 0.35rem 0.8rem;
    border-radius: 2px;
    margin-bottom: 1rem;
}

.pd-title {
    font-size: clamp(1.9rem, 3.4vw, 2.6rem);
    margin-bottom: 0.75rem;
}

.pd-short-desc {
    color: var(--steel);
    font-size: 1.05rem;
    max-width: 480px;
    margin-bottom: 1.5rem;
}

.pd-actions {
    display: flex;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.pd-benefits {
    margin-top: 2rem;
    list-style: none;
    padding: 0;
}

    .pd-benefits li {
        display: flex;
        align-items: flex-start;
        gap: 0.6rem;
        margin-bottom: 0.6rem;
        font-size: 0.92rem;
        color: var(--ink-soft);
    }

        .pd-benefits li i {
            color: var(--ember);
            margin-top: 0.2rem;
        }

/* Spec table */
.pd-specs {
    background: var(--paper);
}

.spec-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    border: 1px solid var(--steel-light);
}

    .spec-table tr {
        border-bottom: 1px solid var(--steel-light);
    }

        .spec-table tr:last-child {
            border-bottom: none;
        }

    .spec-table td {
        padding: 0.9rem 1.2rem;
        font-size: 0.92rem;
    }

        .spec-table td:first-child {
            font-family: var(--font-body);
            font-weight: 500;
            color: var(--steel);
            width: 45%;
        }

        .spec-table td:last-child {
            font-family: var(--font-mono);
            color: var(--ink);
        }

.pack-sizes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    margin-top: 1rem;
}

.pack-chip {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--ink);
    background: var(--white);
    border: 1px solid var(--steel-light);
    padding: 0.4rem 0.85rem;
    border-radius: 2px;
}

/* Long description + applications */
.pd-description {
    line-height: 1.75;
    color: var(--ink-soft);
}

.pd-app-list {
    list-style: none;
    padding: 0;
    margin: 0;
    columns: 2;
    column-gap: 2rem;
}

    .pd-app-list li {
        font-size: 0.9rem;
        color: var(--ink-soft);
        padding: 0.5rem 0;
        border-bottom: 1px solid var(--steel-light);
        break-inside: avoid;
    }

/* Related products */
.pd-related .grade-card {
    height: 100%;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
    background: var(--ink);
    color: var(--steel-light);
    position: relative;
    margin-top: 4rem;
}

    .site-footer::before {
        content: "";
        display: block;
        height: 4px;
        background: linear-gradient(90deg, var(--amber) 0%, var(--ember) 50%, var(--amber) 100%);
    }

.footer-main {
    padding: 3.5rem 0 2.5rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

    .footer-brand img {
        height: 44px;
        width: auto;
    }

    .footer-brand h3 {
        color: var(--white);
        font-size: 1.15rem;
        margin: 0;
        line-height: 1.05;
    }

    .footer-brand p {
        margin: 0;
        font-family: var(--font-mono);
        font-size: 0.62rem;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: var(--amber-light);
    }

.footer-tagline {
    color: var(--steel);
    font-size: 0.9rem;
    line-height: 1.65;
    max-width: 300px;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 0.6rem;
}

    .footer-social a {
        width: 36px;
        height: 36px;
        border: 1px solid var(--ink-line);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--steel-light);
        text-decoration: none;
        font-size: 0.85rem;
        transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
    }

        .footer-social a:hover {
            border-color: var(--ember);
            color: var(--white);
            background: var(--ember);
        }

.footer-heading {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--amber-light);
    margin-bottom: 1.25rem;
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

    .footer-links li {
        margin-bottom: 0.7rem;
    }

    .footer-links a {
        color: var(--steel-light);
        text-decoration: none;
        font-size: 0.9rem;
        transition: color 0.15s ease, padding-left 0.15s ease;
    }

        .footer-links a:hover {
            color: var(--amber-light);
            padding-left: 0.25rem;
        }

.footer-grade-links li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.footer-grade-links .fg-tag {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--steel);
    border: 1px solid var(--ink-line);
    padding: 0.15rem 0.45rem;
    border-radius: 2px;
    white-space: nowrap;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--steel-light);
    line-height: 1.5;
}

.footer-contact i {
    color: var(--ember);
    margin-top: 0.2rem;
    width: 16px;
}

.footer-contact a {
    color: var(--steel-light);
    text-decoration: none;
}

    .footer-contact a:hover {
        color: var(--amber-light);
    }

.footer-bottom {
    border-top: 1px solid var(--ink-line);
    padding: 1.25rem 0;
}

    .footer-bottom .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

.footer-copy {
    font-size: 0.8rem;
    color: var(--steel);
    margin: 0;
}

.footer-badges {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.footer-badge {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.05em;
    color: var(--steel);
    border: 1px solid var(--ink-line);
    padding: 0.3rem 0.6rem;
    border-radius: 2px;
}

@media (max-width: 767px) {
    .footer-bottom .container {
        flex-direction: column;
        text-align: center;
    }
}