:root{
    --primary:#061a44;
    --secondary:#0d6efd;
    --accent:#18b7ff;
    --light:#f5f7fa;
    --dark:#111827;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Barlow',sans-serif;
    overflow-x:hidden;
    color:#222;
    background:#fff;
}

section{
    padding:100px 0;
}

.container-custom{
    width:90%;
    margin:auto;
}

img{
    max-width:100%;
}

a{
    text-decoration:none;
}

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

.main-header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    z-index:999;
    background:#fff;
    box-shadow:0 2px 15px rgba(0,0,0,0.05);
}

.navbar{
    padding:18px 0;
}

.navbar-brand img{
    height:50px;
}

.navbar-nav .nav-link{
    color:var(--dark);
    font-size:17px;
    font-weight:600;
    margin-left:25px;
    transition:0.3s;
}

.navbar-nav .nav-link:hover{
    color:var(--secondary);
}

.theme-btn{
    background:var(--primary);
    color:#fff;
    padding:14px 30px;
    border-radius:50px;
    font-weight:600;
    transition:0.3s;
    display:inline-block;
}

.theme-btn:hover{
    background:var(--secondary);
    color:#fff;
}

/* =========================
MEGA MENU
========================= */

.mega-menu{
    width:700px;
    padding:30px;
    border:none;
    border-radius:20px;
    box-shadow:0 15px 40px rgba(0,0,0,0.08);
}

.mega-box{
    padding:20px;
    border-radius:15px;
    transition:0.3s;
}

.mega-box:hover{
    background:#f5f7fa;
}

.mega-box h5{
    font-weight:700;
    margin-bottom:10px;
    color:var(--primary);
}

.mega-box p{
    font-size:15px;
    color:#666;
    line-height:1.7;
}

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

.hero-section{
    position:relative;
    height:100vh;
    background:url('../images/header_01.jpg') center center/cover no-repeat;
    display:flex;
    align-items:center;
    overflow:hidden;
}

.hero-overlay{
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.55);
}

.hero-content{
    position:relative;
    z-index:2;
    max-width:750px;
    color:#fff;
}

.hero-subtitle{
    display:inline-block;
    font-size:20px;
    margin-bottom:20px;
    letter-spacing:2px;
}

.hero-content h1{
    font-size:78px;
    font-weight:700;
    line-height:1.1;
    margin-bottom:25px;
}

.hero-content p{
    font-size:20px;
    line-height:1.8;
    color:#ddd;
    margin-bottom:40px;
}

.hero-buttons{
    display:flex;
    gap:20px;
    flex-wrap:wrap;
}

.hero-outline-btn{
    border:2px solid #fff;
    color:#fff;
    padding:14px 30px;
    border-radius:50px;
    font-weight:600;
    transition:0.3s;
}

.hero-outline-btn:hover{
    background:#fff;
    color:var(--primary);
}

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

.about-section{
    background:#fff;
}

.about-image img{
    border-radius:25px;
    width:100%;
}

.section-subtitle{
    color:var(--secondary);
    font-weight:600;
    text-transform:uppercase;
    letter-spacing:1px;
    margin-bottom:15px;
    display:inline-block;
}

.about-content h2{
    font-size:50px;
    font-weight:700;
    margin-bottom:25px;
    color:var(--primary);
}

.about-content p{
    font-size:18px;
    line-height:1.9;
    color:#666;
}

.about-features{
    margin-top:30px;
}

.feature-box{
    margin-bottom:15px;
    font-size:18px;
    font-weight:600;
}

/* =========================
SERVICES
========================= */

.services-section{
    background:#f7f9fc;
}

.section-title{
    margin-bottom:60px;
}

.section-title h2{
    font-size:52px;
    font-weight:700;
    color:var(--primary);
}

.service-card{
    background:#fff;
    padding:45px 35px;
    border-radius:25px;
    transition:0.4s;
    height:100%;
    box-shadow:0 10px 30px rgba(0,0,0,0.04);
}

.service-card:hover{
    transform:translateY(-10px);
}

.service-icon{
    font-size:55px;
    margin-bottom:25px;
}

.service-card h4{
    font-size:28px;
    font-weight:700;
    margin-bottom:20px;
}

.service-card p{
    font-size:17px;
    line-height:1.8;
    color:#666;
}

/* =========================
TRACKING SECTION
========================= */

.tracking-section{
    position:relative;
    background:url('../images/body.avif') center center/cover no-repeat;
}

.tracking-overlay{
    position:absolute;
    inset:0;
    background:rgba(6,26,68,0.85);
}

.tracking-content{
    position:relative;
    z-index:2;
    color:#fff;
}

.tracking-content h2{
    font-size:55px;
    font-weight:700;
    margin-bottom:35px;
}

.tracking-form{
    max-width:700px;
    margin:auto;
    display:flex;
    gap:15px;
}

.tracking-form input{
    flex:1;
    height:65px;
    border:none;
    border-radius:50px;
    padding:0 25px;
    font-size:17px;
}

.tracking-form button{
    border:none;
    background:var(--accent);
    color:#fff;
    padding:0 35px;
    border-radius:50px;
    font-weight:600;
    transition:0.3s;
}

.tracking-form button:hover{
    background:#fff;
    color:var(--primary);
}

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

.footer{
    background:#061a44;
    color:#fff;
    padding:80px 0 30px;
}

.footer-logo{
    margin-bottom:25px;
}

.footer-logo img{
    height:55px;
}

.footer p{
    color:#cfd8ea;
    line-height:1.8;
}

.footer h4{
    font-size:24px;
    margin-bottom:25px;
    font-weight:700;
}

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

.footer-links li{
    margin-bottom:15px;
}

.footer-links a{
    color:#cfd8ea;
    transition:0.3s;
}

.footer-links a:hover{
    color:#fff;
}

.footer-bottom{
    border-top:1px solid rgba(255,255,255,0.1);
    margin-top:60px;
    padding-top:30px;
    text-align:center;
}

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

@media(max-width:991px){

    .hero-content h1{
        font-size:55px;
    }

    .about-content{
        margin-top:50px;
    }

    .tracking-form{
        flex-direction:column;
    }

    .mega-menu{
        width:100%;
    }

    .navbar-nav{
        padding-top:20px;
    }

    .navbar-nav .nav-link{
        margin-left:0;
        margin-bottom:10px;
    }
}

@media(max-width:768px){

    section{
        padding:70px 0;
    }

    .hero-section{
        height:auto;
        padding:180px 0 120px;
    }

    .hero-content h1{
        font-size:42px;
    }

    .hero-content p{
        font-size:17px;
    }

    .section-title h2,
    .about-content h2,
    .tracking-content h2{
        font-size:36px;
    }

    .tracking-form input{
        width:100%;
    }
}