:root {
    --oxy-green: #003c21;
    --oxy-gold: #c59647;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

.navbar-main {
    background: #fff;
    box-shadow: 0 2px 14px rgba(0, 0, 0, 0.08);
}

.navbar-brand img {
    max-height: 72px;
}

.navbar-main .nav-link {
    color: #13251b;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 13px;
    padding: 28px 14px;
}

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

.oxy-hero {
    position: relative;
    min-height: 720px;
    background: #111;
}

.oxy-hero .item {
    min-height: 720px;
    background-position: center;
    background-size: cover;
    position: relative;
}

.oxy-hero .item::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(0, 0, 0, 0.62), rgba(0, 0, 0, 0.16));
}

.oxy-hero-content {
    position: relative;
    z-index: 2;
    min-height: 720px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    color: #fff;
}

.oxy-hero-content img {
    max-width: 460px;
    margin-bottom: 24px;
}

.oxy-hero-content h1 {
    max-width: 760px;
    font-size: clamp(40px, 7vw, 88px);
    line-height: 0.98;
    font-weight: 900;
    text-transform: uppercase;
    margin: 0 0 18px;
}

.oxy-hero-content p {
    max-width: 650px;
    font-size: 20px;
    margin-bottom: 30px;
}

.btn-primary {
    background: var(--oxy-green);
    border-color: var(--oxy-green);
    border-radius: 0;
    padding: 12px 26px;
    font-weight: 700;
}

.btn-primary:hover {
    background: var(--oxy-gold);
    border-color: var(--oxy-gold);
}

.section {
    padding: 80px 0;
}

.bggreen,
.topbar,
.info,
.footer {
    background-color: var(--oxy-green) !important;
}

.about_img_stack {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.about_img_stack img {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
}

.counter_sec .statistic {
    padding-top: 60px;
}

.highlight-card {
    min-height: 215px;
    padding: 30px;
    background: #fff;
    border: 1px solid #e8e8e8;
    transition: all .2s ease;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.08);
}

.highlight-card img {
    width: 54px;
    margin-bottom: 18px;
}

.timeline_list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.timeline_box {
    background: #fff;
    padding: 22px;
    border-left: 4px solid var(--oxy-gold);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
}

.service_box {
    min-height: 620px;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
    background-color: #f5f5f5;
}

.spec-table {
    background: #fff;
    border: 1px solid #e5e5e5;
}

.spec-row {
    display: grid;
    grid-template-columns: 60px 1fr 1.4fr;
    border-bottom: 1px solid #e5e5e5;
}

.spec-row:last-child {
    border-bottom: 0;
}

.spec-row > div {
    padding: 18px;
}

.spec-no {
    color: var(--oxy-gold);
    font-weight: 900;
    font-size: 24px;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.gallery-grid img {
    width: 100%;
    height: 260px;
    object-fit: cover;
}

.brochure_sec {
    background: #f5f5f5;
}

.form-control {
    border-radius: 0;
    min-height: 48px;
}

.qr-code img {
    max-width: 110px;
}

.footer_fixed {
    z-index: 99;
}

@media (max-width: 991px) {
    .navbar-main .nav-link {
        padding: 12px 0;
    }

    .oxy-hero,
    .oxy-hero .item,
    .oxy-hero-content {
        min-height: 620px;
    }

    .timeline_list,
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 575px) {
    .section {
        padding: 52px 0;
    }

    .oxy-hero,
    .oxy-hero .item,
    .oxy-hero-content {
        min-height: 540px;
    }

    .oxy-hero-content img {
        max-width: 280px;
    }

    .timeline_list,
    .gallery-grid,
    .spec-row,
    .about_img_stack {
        grid-template-columns: 1fr;
    }

    .gallery-grid img {
        height: 220px;
    }
}