body{
    margin:0;
    font-family:Arial, Helvetica, sans-serif;
    background:#071018;
    color:#e8eef5;
    overflow-x:hidden;
}

html{
    scroll-behavior:smooth;
}

nav{
    position:fixed;
    top:0;
    width:100%;
    z-index:999;
    background:rgba(5,10,18,0.78);
    backdrop-filter:blur(10px);
    border-bottom:1px solid rgba(255,255,255,0.08);
}

.nav-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 0;
}

.logo{
    font-size:30px;
    font-weight:900;
    letter-spacing:4px;
    color:#ffd166;
}

nav ul{
    display:flex;
    list-style:none;
    margin:0;
    padding:0;
    gap:24px;
}

nav li{
    display:flex;
}

nav a{
    text-decoration:none;
    color:#ffffff;
    transition:0.3s;
    font-size:15px;
    letter-spacing:0.5px;
}

nav a:hover{
    color:#ffd166;
}

.hero-section{
    position:relative;
    min-height:100vh;
    display:flex;
    align-items:center;
    background:
        radial-gradient(circle at top right, rgba(255,193,7,0.25), transparent 35%),
        radial-gradient(circle at bottom left, rgba(0,255,200,0.12), transparent 35%),
        linear-gradient(135deg,#061018,#0a1622,#071018);
}

.hero-overlay{
    position:absolute;
    inset:0;
    background-image:url('https://www.transparenttextures.com/patterns/stardust.png');
    opacity:0.15;
}

.hero-content{
    position:relative;
    z-index:2;
    padding-top:100px;
}

.hero-badge{
    display:inline-block;
    padding:10px 18px;
    border-radius:999px;
    background:rgba(255,209,102,0.1);
    color:#ffd166;
    border:1px solid rgba(255,209,102,0.25);
    margin-bottom:25px;
}

.hero-section h1{
    font-size:64px;
    line-height:1.1;
    font-weight:900;
    margin-bottom:28px;
}

.hero-section p{
    font-size:18px;
    color:#cfd8e3;
    line-height:1.9;
}

.hero-buttons{
    margin-top:35px;
    display:flex;
    gap:16px;
    flex-wrap:wrap;
}

.primary-btn,
.secondary-btn{
    text-decoration:none;
    padding:15px 28px;
    border-radius:14px;
    transition:0.3s;
}

.primary-btn{
    background:#ffd166;
    color:#071018;
    font-weight:700;
}

.primary-btn:hover{
    transform:translateY(-4px);
}

.secondary-btn{
    border:1px solid rgba(255,255,255,0.15);
    color:#fff;
}

.secondary-btn:hover{
    background:rgba(255,255,255,0.08);
}

.hero-image img,
.feature-image,
.stack-images img,
.glass-card img,
.mini-card img{
    width:100%;
    border-radius:24px;
}

.hero-image img{
    box-shadow:0 30px 60px rgba(0,0,0,0.5);
}

.intro-section,
.content-section,
.timeline-section{
    padding:110px 0;
}

.dark-section{
    padding:110px 0;
    background:#0a1520;
}

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

.section-title.left{
    text-align:left;
}

.section-title span{
    color:#ffd166;
    text-transform:uppercase;
    letter-spacing:3px;
    font-size:13px;
}

.section-title h2{
    font-size:46px;
    margin-top:15px;
    font-weight:800;
}

.glass-card,
.mini-card,
.feature-item,
.timeline-item{
    background:rgba(255,255,255,0.04);
    border:1px solid rgba(255,255,255,0.08);
    border-radius:26px;
    padding:28px;
    transition:0.35s;
    height:100%;
    backdrop-filter:blur(8px);
}

.glass-card:hover,
.mini-card:hover,
.feature-item:hover,
.timeline-item:hover{
    transform:translateY(-10px);
    border-color:rgba(255,209,102,0.35);
}

.glass-card h3,
.mini-card h4,
.feature-item h4{
    margin-top:24px;
    margin-bottom:18px;
    font-weight:700;
}

.glass-card p,
.mini-card p,
.feature-item p,
.timeline-item p{
    color:#c4cfdb;
    line-height:1.8;
}

.feature-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:20px;
    margin-top:40px;
}

.stack-images{
    display:flex;
    flex-direction:column;
    gap:25px;
}

.parallax-section{
    position:relative;
    padding:140px 0;
    text-align:center;
    background:
        linear-gradient(rgba(4,10,15,0.8), rgba(4,10,15,0.8)),
        url('https://ts2.mm.bing.net/th?q=solar+energy+background');
    background-size:cover;
    background-position:center;
    background-attachment:fixed;
}

.parallax-section h2{
    font-size:52px;
    font-weight:900;
    margin-bottom:25px;
}

.parallax-section p{
    max-width:850px;
    margin:auto;
    font-size:19px;
    line-height:1.9;
    color:#d7dfe8;
}

.timeline{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:28px;
}

footer{
    padding:90px 0 40px;
    background:#050c13;
    border-top:1px solid rgba(255,255,255,0.08);
}

.footer-grid{
    display:grid;
    grid-template-columns:2fr 1fr 1fr 1fr;
    gap:40px;
}

footer h3,
footer h4{
    margin-bottom:22px;
}

footer p,
footer li{
    color:#b8c4d1;
    line-height:1.9;
}

footer ul{
    list-style:none;
    padding:0;
    margin:0;
}

footer a{
    text-decoration:none;
    color:#b8c4d1;
    transition:0.3s;
}

footer a:hover{
    color:#ffd166;
}

.footer-bottom{
    margin-top:50px;
    padding-top:30px;
    border-top:1px solid rgba(255,255,255,0.08);
    text-align:center;
}

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

.reveal.visible{
    opacity:1;
    transform:translateY(0);
    transition:1s;
}

@media(max-width:991px){

    .hero-section h1{
        font-size:44px;
    }

    .section-title h2{
        font-size:34px;
    }

    .feature-grid,
    .timeline,
    .footer-grid{
        grid-template-columns:1fr;
    }

    nav ul{
        gap:14px;
        flex-wrap:wrap;
    }

    .nav-wrap{
        flex-direction:column;
        gap:16px;
    }

    .parallax-section h2{
        font-size:38px;
    }
}