:root{
    --primary:#3b82f6;
    --dark:#050816;
    --card:#0f172a;
    --text:#ffffff;
    --gray:#94a3b8;
}

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

html{
    scroll-behavior:smooth;
}

body{
    font-family:'Pretendard',sans-serif;
    background:var(--dark);
    color:var(--text);
    line-height:1.6;
}

a{
    text-decoration:none;
    color:inherit;
}

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

.container{
    width:100%;
    max-width:1200px;
    margin:auto;
    padding:0 20px;
}

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

header{
    position:fixed;
    top:0;
    left:0;
    width:100%;
    z-index:1000;

    backdrop-filter:blur(20px);

    background:rgba(5,8,22,.75);
    border-bottom:1px solid rgba(255,255,255,.08);
}

.nav{
    height:80px;

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

.logo{
    font-size:28px;
    font-weight:800;
}

.logo span{
    color:var(--primary);
}

.menu{
    display:flex;
    gap:30px;
}

.menu a{
    color:#fff;
    transition:.3s;
}

.menu a:hover{
    color:var(--primary);
}

.mobile-btn{
    display:none;
    font-size:30px;
    cursor:pointer;
}

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

.hero{
    min-height:100vh;

    display:flex;
    align-items:center;

    background:
    radial-gradient(circle at top right,
    rgba(59,130,246,.35),
    transparent 35%);
}

.hero-wrap{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:60px;
    align-items:center;
}

.hero h1{
    font-size:70px;
    line-height:1.1;
    margin-bottom:25px;
}

.hero h1 span{
    color:var(--primary);
}

.hero p{
    color:var(--gray);
    font-size:18px;
    margin-bottom:35px;
}

.btn-group{
    display:flex;
    gap:15px;
}

.btn{
    padding:15px 28px;
    border-radius:12px;
    font-weight:600;
}

.btn-primary{
    background:var(--primary);
}

.btn-outline{
    border:1px solid rgba(255,255,255,.2);
}

.hero-box{
    height:500px;

    border-radius:30px;

    background:linear-gradient(
        135deg,
        rgba(59,130,246,.3),
        rgba(255,255,255,.05)
    );

    backdrop-filter:blur(30px);

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

    font-size:80px;
}

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

section{
    padding:120px 0;
}

.section-title{
    text-align:center;
    margin-bottom:70px;
}

.section-title h2{
    font-size:48px;
    margin-bottom:15px;
}

.section-title p{
    color:var(--gray);
}

/* ==========================
   SERVICE
========================== */

.services{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:25px;
}

.service-card{
    padding:40px;
    border-radius:20px;

    background:var(--card);

    border:1px solid rgba(255,255,255,.05);

    transition:.3s;
}

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

.service-card h3{
    margin-bottom:15px;
}

.service-card p{
    color:var(--gray);
}

/* ==========================
   PORTFOLIO
========================== */

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

.portfolio-item{
    overflow:hidden;

    aspect-ratio:4/3;

    border-radius:20px;

    position:relative;

    background:
    linear-gradient(
        135deg,
        #1e293b,
        #3b82f6
    );
}

.portfolio-info{
    position:absolute;
    inset:0;

    background:
    rgba(0,0,0,.6);

    display:flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;

    opacity:0;

    transition:.3s;
}

.portfolio-item:hover .portfolio-info{
    opacity:1;
}

/* ==========================
   STATS
========================== */

.stats{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:30px;
}

.stat-box{
    text-align:center;
    padding:40px;

    background:var(--card);

    border-radius:20px;
}

.stat-box h3{
    font-size:56px;
    color:var(--primary);
}

/* ==========================
   CONTACT
========================== */

.contact-form{
    max-width:800px;
    margin:auto;
}

.input-group{
    margin-bottom:20px;
}

.input-group input,
.input-group textarea{

    width:100%;
    padding:15px;

    border:none;
    border-radius:12px;

    background:var(--card);
    color:#fff;
}

.input-group textarea{
    height:180px;
    resize:none;
}

.submit-btn{

    width:100%;
    padding:18px;

    border:none;

    border-radius:12px;

    background:var(--primary);

    color:#fff;

    font-size:18px;

    cursor:pointer;
}

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

footer{
    padding:40px 0;
    text-align:center;

    border-top:1px solid rgba(255,255,255,.08);

    color:var(--gray);
}

/* ==========================
   MOBILE
========================== */

@media(max-width:992px){

    .hero-wrap{
        grid-template-columns:1fr;
    }

    .hero h1{
        font-size:50px;
    }

    .services,
    .portfolio,
    .stats{
        grid-template-columns:1fr 1fr;
    }
}

@media(max-width:768px){

    .menu{

        position:fixed;

        top:80px;
        left:-100%;

        width:100%;
        height:calc(100vh - 80px);

        background:#050816;

        flex-direction:column;

        align-items:center;

        padding-top:50px;

        transition:.3s;
    }

    .menu.show{
        left:0;
    }

    .mobile-btn{
        display:block;
    }

    .hero h1{
        font-size:40px;
    }

    .services,
    .portfolio,
    .stats{
        grid-template-columns:1fr;
    }

    .section-title h2{
        font-size:34px;
    }
}
.contact-link{
    color:#3b82f6;
    text-decoration:none;
    transition:.3s;
}

.contact-link:hover{
    color:#60a5fa;
    text-decoration:underline;
}
.portfolio-item{
    position:relative;
    overflow:hidden;
    border-radius:20px;
    aspect-ratio:4/3;
}

.portfolio-item img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:.4s;
}

.portfolio-item:hover img{
    transform:scale(1.05);
}

.portfolio-info{
    position:absolute;
    inset:0;

    background:rgba(0,0,0,.6);

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

    opacity:0;
    transition:.3s;
}

.portfolio-item:hover .portfolio-info{
    opacity:1;
}