/* ===================================
ROOT
=================================== */

:root{

    --primary:#31514A;
    --secondary:#FF9700;
    --light:#FFFCE9;
    --dark:#1f2f2b;
    --gray:#6b6b6b;
    --white:#ffffff;

    --radius:16px;
    --shadow:0 15px 40px rgba(0,0,0,.08);

}

/* ===================================
RESET
=================================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{

    font-family:'Montserrat',sans-serif;
    overflow-x:hidden;
    color:var(--dark);
    background:#fff;

}

img{
    display:block;
    width:100%;
}

a{
    text-decoration:none;
}

ul{
    list-style:none;
}

/* ===================================
CONTAINER
=================================== */

.container{

    width:90%;
    max-width:1320px;
    margin:auto;

}

/* ===================================
HEADER
=================================== */

.header{

    position:fixed;
    top:0;
    left:0;

    width:100%;
    z-index:999;

    background:rgba(255,255,255,.96);

    backdrop-filter:blur(12px);

    border-bottom:1px solid rgba(0,0,0,.05);

}

.header .container{

    display:flex;
    justify-content:space-between;
    align-items:center;

    height:90px;

}

.logo img{

    width:180px;

}

.nav{

    display:flex;
    gap:35px;

}

.nav a{

    color:var(--primary);
    font-weight:600;
    font-size:14px;

    transition:.3s;

}

.nav a:hover{

    color:var(--secondary);

}

.quote-btn{

    background:var(--secondary);
    color:#fff;

    padding:14px 24px;
    border-radius:10px;

    font-weight:600;

}

.mobile-btn{

    display:none;
    font-size:24px;

}

/* ===================================
HERO
=================================== */

.hero{

    position:relative;
    min-height:100vh;

    background:url("images/banner.png")
    center center/cover;

    display:flex;
    align-items:center;

}

.overlay{

    position:absolute;
    inset:0;

    background:
    linear-gradient(
        rgba(0,0,0,.55),
        rgba(0,0,0,.45)
    );

}

.hero-content{

    position:relative;
    z-index:2;

    max-width:800px;

}

.hero-content h1{

    color:#fff;

    font-size:72px;
    line-height:1.1;

    margin-bottom:20px;

}

.hero-content p{

    color:#fff;

    font-size:22px;

    margin-bottom:35px;

}

.hero-buttons{

    display:flex;
    gap:20px;

}

.btn-primary{

    display:inline-block;

    background:var(--secondary);

    color:#fff;

    padding:18px 30px;

    border-radius:12px;

    font-weight:600;

}

.btn-secondary{

    display:inline-block;

    border:2px solid #fff;

    color:#fff;

    padding:18px 30px;

    border-radius:12px;

}

/* ===================================
FEATURES
=================================== */

.features{

    padding:100px 0;

}

.feature-grid{

    display:grid;

    grid-template-columns:
    repeat(4,1fr);

    gap:25px;

}

.feature-card{

    background:#fff;

    padding:35px;

    border-radius:20px;

    box-shadow:var(--shadow);

    text-align:center;

    transition:.3s;

}

.feature-card:hover{

    transform:translateY(-10px);

}

.feature-card i{

    font-size:48px;
    color:var(--secondary);

    margin-bottom:20px;

}

.feature-card h3{

    margin-bottom:15px;
    color:var(--primary);

}

.feature-card p{

    color:var(--gray);

}

/* ===================================
SECTION TITLE
=================================== */

.section-title{

    text-align:center;
    margin-bottom:60px;

}

.section-title span{

    color:var(--secondary);
    font-weight:700;

}

.section-title h2{

    font-size:48px;
    color:var(--primary);

    margin-top:10px;

}

section{
    scroll-margin-top:120px;
}

/* ===================================
ABOUT
=================================== */

.about{

    padding:120px 0;
    background:var(--light);

}

.about-grid{

    display:grid;
    grid-template-columns:1fr 1fr;
    gap:60px;

    align-items:center;

}

.about-text p{

    font-size:20px;
    line-height:1.9;

}

.stats{

    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;

}

.stat{

    background:#fff;

    padding:30px;

    border-radius:16px;

    text-align:center;

}

.stat h3{

    font-size:42px;
    color:var(--secondary);

}

/* ===================================
PRODUCTS
=================================== */

.products{
    padding:100px 0;
}

.products-grid{

    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:30px;

}

.product-card{

    background:#fff;

    border-radius:18px;

    overflow:hidden;

    box-shadow:
    0 10px 30px rgba(0,0,0,.06);

    transition:.35s;

}

.product-card:hover{

    transform:translateY(-10px);

    box-shadow:
    0 20px 50px rgba(0,0,0,.12);

}

.product-image{

    height:260px;
    overflow:hidden;

}

.product-image img{

    width:100%;
    height:100%;

    object-fit:cover;

    transition:.5s;

}

.product-card:hover img{

    transform:scale(1.08);

}

.product-content{

    padding:25px;

}

.product-content h3{

    color:#31514A;

    margin-bottom:15px;

    font-size:26px;

}

.product-content p{

    color:#666;

    margin-bottom:15px;

}

.product-content ul{

    margin-bottom:25px;

    padding-left:18px;

}

.product-content li{

    margin-bottom:8px;

    color:#555;

}


.product-contact{

    margin-top:20px;

    padding-top:20px;

    border-top:1px solid #eee;

}

.product-contact span{

    display:block;

    font-size:13px;

    color:#888;

    margin-bottom:5px;

}

.product-contact strong{

    display:block;

    color:#31514A;

    margin-bottom:10px;

}

.product-contact a{

    display:inline-flex;

    align-items:center;

    gap:8px;

    background:#FF9700;

    color:white;

    padding:10px 16px;

    border-radius:8px;

    font-weight:600;

}

/* =====================
CONSULTING SECTION
===================== */

.consulting{

    position:relative;
    height:650px;
    overflow:hidden;

}

.consulting-bg{

    position:absolute;
    inset:0;

    width:100%;
    height:100%;

    object-fit:cover;

}

.consulting-overlay{

    position:absolute;
    inset:0;

    background:
    linear-gradient(
        90deg,
        rgba(20,55,48,.97) 0%,
        rgba(20,55,48,.93) 20%,
        rgba(20,55,48,.82) 35%,
        rgba(20,55,48,.55) 50%,
        rgba(20,55,48,.15) 70%,
        rgba(20,55,48,0) 100%
    );

    z-index:1;

}

.consulting .container{

    position:relative;
    z-index:2;

    height:100%;

    display:flex;
    align-items:center;

}

.consulting-content{

    width:520px;
    color:white;

}

.consulting-content h2{

    font-size:50px;
    font-weight:800;
    line-height:0.95;

    margin-bottom:30px;

}

.consulting-content p{

    font-size:22px;
    line-height:1.8;

    margin-bottom:35px;

    color:#f5f5f5;

}

.consulting-content ul{

    list-style:none;

    margin-bottom:40px;

}

.consulting-content li{

    position:relative;

    padding-left:40px;

    margin-bottom:18px;

    font-size:22px;

}

.consulting-content li::before{

    content:"✓";

    position:absolute;

    left:0;

    color:#FF9700;

    font-weight:700;

    font: size 20px;

}

.consult-btn{

    display:inline-flex;

    align-items:center;
    justify-content:center;

    width:280px;
    height:82px;

    border:2px solid rgba(255,255,255,.5);

    border-radius:18px;

    color:white;

    font-size:18px;
    font-weight:700;

    transition:.3s;

}

.consult-btn:hover{

    background:#FF9700;
    border-color:#FF9700;

}

/* ===================================
PROJECTS
=================================== */

.projects{

    padding:120px 0;

}

.projects-grid{

    display:grid;
    grid-template-columns:repeat(4,1fr);

    gap:20px;

}

.projects-grid img{

    height:260px;

    object-fit:cover;

    border-radius:16px;

    transition:.4s;

}

.projects-grid img:hover{

    transform:scale(1.05);

}


/* ===================================
FOOTER
=================================== */

/* ==========================
FOOTER CTA
========================== */

.footer-cta{

    background:
    linear-gradient(
    rgba(14,55,49,.90),
    rgba(14,55,49,.90)
    ),
    url("images/project-1.jpg");

    background-size:cover;
    background-position:center;

    padding:50px 0;

}

.footer-cta-grid{

    display:grid;

    grid-template-columns:
    2fr 1fr 1fr auto;

    gap:40px;

    align-items:center;

}

.footer-cta h2{

    color:white;

    font-size:52px;

    margin-bottom:15px;

}

.footer-cta p{

    color:#d7d7d7;

}

.footer-contact-item{

    display:flex;

    align-items:center;

    gap:15px;

    color:white;

}

.footer-contact-item i{

    font-size:30px;

    color:#FF9700;

}

.footer-contact-item strong{

    display:block;

    font-size:22px;

}

.footer-contact-item span{

    color:#ddd;

    font-size:16px;

}

.footer-btn{

    background:#FF9700;

    color:white;

    padding:18px 35px;

    border-radius:10px;

    font-weight:700;

}

/* ==========================
MAIN FOOTER
========================== */

.footer-main{

    background:#fff;

    padding:70px 0;

}

.footer-grid{

    display:grid;

    grid-template-columns:
    1.5fr 1fr 1fr;

    gap:80px;

}

.footer-logo{

    width:220px;

    margin-bottom:25px;

}

.footer-main p{

    color:#444;

    line-height:1.9;

}

.footer-main h3{

    margin-bottom:25px;

    color:#1d1d1d;

}

.footer-main ul{

    list-style:none;

}

.footer-main li{

    margin-bottom:15px;

}

.footer-main a{

    color:#333;

}

.footer-contact-list i{

    color:#31514A;

    margin-right:10px;

}

.socials{

    display:flex;

    gap:15px;

    margin-top:25px;

}

.socials a{

    width:50px;

    height:50px;

    border-radius:50%;

    background:#31514A;

    color:white;

    display:flex;

    align-items:center;

    justify-content:center;

}

/* ==========================
COPYRIGHT
========================== */

.copyright{

    text-align:center;

    padding:25px;

    border-top:1px solid #eee;

    background:white;

}

/* ===================================
RESPONSIVE
=================================== */

@media(max-width:992px){

    .feature-grid,
    .products-grid,
    .projects-grid{

        grid-template-columns:
        repeat(2,1fr);

    }

    .about-grid{

        grid-template-columns:1fr;

    }

}

@media(max-width:768px){

    .nav,
    .quote-btn{

        display:none;

    }

    .mobile-btn{

        display:block;

    }

    .hero-content h1{

        font-size:42px;

    }

    .hero-buttons{

        flex-direction:column;

    }

    .feature-grid,
    .products-grid,
    .projects-grid,
    .stats,
    .footer-grid{

        grid-template-columns:1fr;

    }

    .section-title h2{

        font-size:34px;

    }

    .nav.active{
    display:flex !important;
    }

    .header.sticky{
        box-shadow:0 10px 30px rgba(0,0,0,.08);
    }

    .show{
        opacity:1 !important;
        transform:translateY(0) !important;
    }

    .back-to-top{
        position:fixed;
        right:25px;
        bottom:25px;
        width:55px;
        height:55px;
        border:none;
        border-radius:50%;
        background:#FF9700;
        color:#fff;
        cursor:pointer;
        opacity:0;
        visibility:hidden;
        transition:.3s;
        z-index:999;
    }

    .back-to-top.show{
        opacity:1;
        visibility:visible;
    }

    #services-anchor{

    position:absolute;

    top:-120px;

    }

    html{
    scroll-behavior:smooth;
    }

    section{
        scroll-margin-top:120px;
    }

    @media(max-width:768px){

    .certificate-layout{

        grid-template-columns:1fr;

        gap:40px;

    }

    .certificate-left h2{

        font-size:42px;

    }

}

}

    /* ==========================
    CERTIFICATES SECTION
    ========================== */

    .certificates{

        padding:100px 0;

        background:#fff;

    }

    .certificate-layout{

        display:flex;

        flex-direction:column;

        align-items:center;

    }

    .certificate-left{

        text-align:center;

        margin-bottom:50px;

        max-width:700px;

    }

    .certificate-left span{

        color:#FF9700;

        font-size:16px;

        font-weight:700;

        letter-spacing:2px;

        text-transform:uppercase;

    }

    .certificate-left h2{

        margin-top:15px;

        margin-bottom:20px;

        color:#31514A;

        font-size:48px;

        line-height:1.1;

    }

    .certificate-left p{

        color:#666;

        line-height:1.8;

        font-size:16px;

    }

    .certificate-right{

        width:100%;

        display:grid;

        grid-template-columns:repeat(2,1fr);

        gap:30px;

    }

    .certificate-item{

        background:#fff;

        padding:35px;

        border-radius:20px;

        border:1px solid #eee;

        box-shadow:0 10px 30px rgba(0,0,0,.06);

        transition:.3s;

        min-height:220px;

        display:flex;

        flex-direction:column;

    }

    .certificate-item:hover{

        transform:translateY(-5px);

        border-color:#FF9700;

        box-shadow:0 20px 40px rgba(0,0,0,.1);

    }

    .certificate-badge{

        display:inline-flex;

        align-items:center;

        justify-content:center;

        background:#31514A;

        color:#fff;

        padding:8px 18px;

        border-radius:50px;

        font-size:13px;

        font-weight:700;

        margin-bottom:15px;

    }

    .certificate-item h3{

        color:#31514A;

        font-size:28px;

        margin-bottom:10px;

    }

    .certificate-item p{

        color:#666;

        font-size:16px;

        line-height:1.7;

    }

    .certificate-item::after{

        content:"PDF үзэх →";

        display:block;

        margin-top:auto;

        padding-top:20px;

        color:#FF9700;

        font-weight:600;

    }

    /* ==========================
    RESPONSIVE
    ========================== */

    @media(max-width:991px){

        .certificate-right{

            grid-template-columns:1fr;

        }

        .certificate-left{

            text-align:center;

        }

        .certificate-left h2{

            font-size:42px;

        }

    }

    @media(max-width:768px){

        .certificates{

            padding:70px 0;

        }

        .certificate-left h2{

            font-size:36px;

        }

        .certificate-item{

            padding:25px;

        }

        .certificate-item h3{

            font-size:22px;

        }

    }