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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: radial-gradient(circle at top, #112240, #0a192f 60%);
    color: #e6f1ff;
    line-height: 1.8;
}


.hero {
    text-align: center;
    padding: 5rem 8%;
    background: linear-gradient(to bottom, rgba(0,0,0,0.6), transparent);
}

.big-pi {
    font-size: 7rem;
    color: #64ffda;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-1.2rem) rotate(4deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

h1 {
    font-size: 2.5rem;
    letter-spacing: 0.2rem;
}

.tagline {
    margin-top: 0.5rem;
    opacity: 0.8;
}


.pi-slider {
    overflow: hidden;
    white-space: nowrap;
    border-top: 0.1rem solid #64ffda;
    border-bottom: 0.1rem solid #64ffda;
    margin: 2rem 0;
   
}

.pi-track {
    display: inline-block;
    padding: 0.6rem 0;
    animation: slide 20s linear infinite;
}

@keyframes slide {
    from { transform: translateX(100%); }
    to { transform: translateX(-100%); }
}


nav {
    margin-top: 1rem;
}

nav a {
    display: inline-flex;
    flex-wrap: wrap;
    padding: 0.7rem 1.5rem;
    margin: 0 0.6rem;
    border-radius: 3rem;
    border: 0.1rem solid #64ffda;
    color: #64ffda;
    text-decoration: none;
    transition: 0.3s ease;
}

nav a:hover {
    background: #64ffda;
    color: #0a192f;
    transform: scale(1.1);
    box-shadow: 0 0 2rem rgba(100,255,218,0.6);
}


.section {
    padding: 4rem 15%;
}

.alt {
    background: rgba(255,255,255,0.03);
    backdrop-filter: blur(0.5rem);
}

h2 {
    margin-bottom: 1rem;
    color: #64ffda;
    font-size: 1.8rem;
}


.section-image {
    display: block;
    margin: 1rem auto 2rem auto;
    border: 0.1rem solid #64ffda;
    border-radius: 3rem;
    width: 300px;
    height: auto;
    transition: 0.3s ease;
}

.section-image:hover {
    background: #64ffda;
    transform: scale(1.05);
    box-shadow: 0 0 2rem rgba(100,255,218,0.6);
}


.formula-card {
    background: rgba(100,255,218,0.08);
    border: 0.1rem solid rgba(100,255,218,0.3);
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 1rem;
    font-size: 1.2rem;
    transition: 0.3s;
}

.formula-card:hover {
    transform: scale(1.05);
    box-shadow: 0 0 2rem rgba(100,255,218,0.4);
}


ul {
    list-style: none;
}

li {
    margin-bottom: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

li::before {
    content: "•";
    color: #64ffda;
    position: absolute;
    left: 0;
}


footer {
    text-align: center;
    padding: 2rem;
    background: rgba(0,0,0,0.6);
    font-size: 0.9rem;
    opacity: 0.7;
}
@media (max-width:480px) {
    .section, .alt {
        padding: 5%;
    }
    p{
        font-size: 1.1em;
        text-align: justify;
    }
    h1,h2{
        text-align: center;
    }
    nav a{
        margin-top: 3%;
        width: 35%;
    }
    .tagline{
        text-align: center;
    }
}