:root{
    --bg:#f5f5f5;
    --surface:#ffffff;
    --surface-2:#efefef;

    --text:#2a2a2a;
    --muted:#6b6b6b;

    --border:#d8d8d8;

    /* Very subtle blue */
    --accent:#5b88b8;
    --accent-light:#edf4fb;

    --radius:12px;
    --shadow:0 6px 18px rgba(0,0,0,.08);
}

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

body{
    font-family:Arial, Helvetica, sans-serif;
    background:var(--bg);
    color:var(--text);
}

.container{
    width:min(1100px,90%);
    margin:auto;
}

nav{
    background:white;
    border-bottom:1px solid var(--border);
}

.navbar{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:18px 0;
}

.logo{
    font-size:1.4rem;
    font-weight:bold;
    color:#444;
}

nav a{
    text-decoration:none;
    color:#555;
    margin-left:25px;
    transition:.2s;
}

nav a:hover{
    color:var(--accent);
}

.hero{
    padding:80px 0;
}

.hero-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:50px;
    align-items:center;
}

.hero h1{
    font-size:3rem;
    margin-bottom:20px;
}

.hero p{
    color:var(--muted);
    margin-bottom:30px;
    line-height:1.7;
}

.button{
    display:inline-block;
    background:#444;
    color:white;
    padding:14px 28px;
    border-radius:8px;
    text-decoration:none;
    transition:.25s;
}

.button:hover{
    background:var(--accent);
}

.preview{
    background:white;
    border:1px solid var(--border);
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    padding:20px;
}

.preview-box{
    height:320px;
    border-radius:8px;
    background:linear-gradient(#fafafa,#ececec);
    border:1px solid #ddd;
    display: grid;
    align-items: center;
    justify-content: center;
}

.features{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
    gap:20px;
    margin:60px 0;
}

.card{
    background:white;
    border:1px solid var(--border);
    border-radius:var(--radius);
    padding:25px;
    box-shadow:var(--shadow);
}

.card h3{
    margin-bottom:10px;
    color:#333;
}

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

.card:hover{
    border-color:#c7d8ea;
    background:var(--accent-light);
}

footer{
    margin-top:60px;
    padding:30px;
    text-align:center;
    color:#777;
    border-top:1px solid var(--border);
}

@media(max-width:800px){

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

.hero h1{
    font-size:2.2rem;
}

}

.slider {
    width: 300px;
    height: 10px;
    background: #ddd;
    border-radius: 999px;
    overflow: hidden;
    margin: 20px 0;
}

.fill {
    height: 100%;
    width: 0%;
    background: #666;
    animation: sliderMove linear infinite;
}

/* Different speeds */
.slider1 .fill {
    animation-duration: 2s;
}

.slider2 .fill {
    animation-duration: 3.5s;
}

.slider3 .fill {
    animation-duration: 5s;
}

@keyframes sliderMove {
    0% {
        width: 0%;
    }

    50% {
        width: 100%;
    }

    100% {
        width: 0%;
    }
}

#wave {
    width: 100%;
    height: 100px;
    display: block;
    background: #f5f5f5;
}