Landing Page usng HTML CSS

/* Modern UI Variables */
:root {
    --primary: #6366f1;
    --text-dark: #1e293b;
    --text-light: #ffffff;
    --nav-bg: rgba(227, 189, 189, 0.7);
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    height: 250vh;
    /* Scroll space */
    background: #f8fafc;
    color: var(--text-dark);
}

/* --- THE NAVIGATION --- */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px 5%;
    /* Starts tall and airy */
    z-index: 1000;

/* The Scroll Animation Magic */
    animation: nav-morph linear forwards;
    animation-timeline: scroll();
    animation-range: 0px 150px;
}

@keyframes nav-morph {
    to {
        padding: 16px 10%;
        background: var(--nav-bg);
        backdrop-filter: blur(12px);
        /* Frosted glass effect */
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.3);
        box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05);
    }
}

/* Logo Styling */
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--primary);
    cursor: pointer;
}

/* Menu Links */
.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

/* Modern Hover Underline */
.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

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

/* "Get Started" Button (UI Polish) */
.cta-btn {
    background: var(--primary);
    color: white !important;
    padding: 10px 24px;
    border-radius: 50px;
    font-weight: 600 !important;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

/* Content Placeholder */
.hero {
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at top right, #eef2ff, #f8fafc);
    text-align: center;
    padding: 20px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(to right, #4f46e5, #ec4899);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

- Landing Page usng HTML CSS

Live Preview