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

html{
    scroll-behavior:smooth;
}

body{
    font-family:Inter,system-ui,sans-serif;
    color:#f3f4f6;
    background:
    radial-gradient(circle at top left,#2563eb33,transparent 35%),
    radial-gradient(circle at bottom right,#3b82f633,transparent 35%),
    #070b14;
    line-height:1.6;
}

.container{
    width:min(1100px,92%);
    margin:auto;
}

header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:30px 0;
}

.logo{
    font-size:1.4rem;
    font-weight:700;
    letter-spacing:.5px;
}

.logo span{
    color:#60a5fa;
}

nav{
    display:flex;
    gap:22px;
}

nav a{
    color:#a1a1aa;
    text-decoration:none;
    font-size:.95rem;
    transition:.25s;
    position:relative;
}

nav a::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-5px;
    width:0;
    height:2px;
    background:#60a5fa;
    transition:.3s;
}

nav a:hover{
    color:white;
}

nav a:hover::after{
    width:100%;
}

.hero{
    padding:120px 0 90px;
}

.badge{
    display:inline-block;
    background:#60a5fa20;
    color:#7dd3fc;
    padding:7px 14px;
    border-radius:999px;
    border:1px solid #60a5fa33;
    font-size:.85rem;
}

.hero h1{
    margin-top:18px;
    font-size:clamp(2.8rem,7vw,4.4rem);
    line-height:1;
    max-width:700px;
}

.subtitle{
    margin-top:18px;
    max-width:620px;
    color:#9ca3af;
    font-size:1.05rem;
}

.buttons{
    display:flex;
    gap:15px;
    margin-top:35px;
    flex-wrap:wrap;
}

.primary,
.secondary,
.github-btn{
    transition:.3s;
    text-decoration:none;
    border-radius:14px;
    padding:13px 22px;
    font-weight:600;
}

.primary{
    background:#60a5fa;
    color:#081018;
}

.primary:hover{
    transform:translateY(-4px);
    box-shadow:0 20px 45px rgba(96,165,250,.35);
}

.secondary{
    border:1px solid rgba(255,255,255,.08);
    color:white;
    background:rgba(255,255,255,.02);
}

.secondary:hover{
    background:rgba(255,255,255,.05);
    border-color:#60a5fa;
}

.section{
    padding:90px 0;
}

.section h2{
    font-size:2rem;
    margin-bottom:10px;
}

.hint{
    color:#94a3b8;
    margin-bottom:30px;
}

.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(270px,1fr));
    gap:22px;
}

.card{
    padding:24px;
    border-radius:18px;
    background:rgba(255,255,255,.04);
    border:1px solid rgba(255,255,255,.08);
    backdrop-filter:blur(12px);
    transition:.35s;
    opacity:0;
    transform:translateY(30px);
}

.card.show{
    opacity:1;
    transform:none;
}

.card:hover{
    transform:translateY(-10px);
    border-color:#60a5fa55;
    box-shadow:0 25px 45px rgba(0,0,0,.35);
}

.card h3{
    margin-bottom:12px;
    font-size:1.2rem;
}

.card p{
    color:#a1a1aa;
    font-size:.95rem;
}

.card span{
    display:inline-block;
    margin-top:18px;
    color:#60a5fa;
    font-size:.85rem;
    font-weight:600;
}

.github-btn{
    display:inline-flex;
    align-items:center;
    gap:10px;
    background:#101827;
    border:1px solid rgba(255,255,255,.08);
    color:white;
}

.github-btn:hover{
    transform:translateY(-4px);
    border-color:#60a5fa;
    box-shadow:0 18px 40px rgba(96,165,250,.18);
}

footer{
    padding:60px 0 30px;
    text-align:center;
    color:#6b7280;
    font-size:.9rem;
}

.reveal{
    opacity:0;
    transform:translateY(40px);
    transition:.8s;
}

.reveal.active{
    opacity:1;
    transform:none;
}

@media(max-width:768px){

    header{
        flex-direction:column;
        gap:18px;
    }

    nav{
        flex-wrap:wrap;
        justify-content:center;
    }

    .hero{
        text-align:center;
        padding:90px 0 70px;
    }

    .subtitle{
        margin-inline:auto;
    }

    .buttons{
        justify-content:center;
    }

}