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

body, html {
    height: 100%;
    font-family: 'Arial', sans-serif;
    color: #fff;
    display: flex;
    flex-direction: column;
    background: linear-gradient(-45deg, #0a1a3b, #1b2a5a, #0d4fff, #1b2a5a);
    background-size: 400% 400%;
    animation: waveGradient 25s ease infinite;
}

@keyframes waveGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 80px 20px 20px 20px; /* Top padding for fixed nav */
}

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    z-index: 1000;
}

.top-nav a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    margin: 0 10px;
}

.top-nav a:hover {
    background: rgba(13, 79, 255, 0.2);
    transform: translateY(-2px);
}

.top-nav a.active {
    background: rgba(13, 79, 255, 0.3);
    cursor: default;
}

.top-nav a.active:hover {
    transform: none;
    background: rgba(13, 79, 255, 0.3);
}

h1 {
    font-size: 6rem;
    font-weight: bold;
    letter-spacing: 5px;
    text-shadow: 0 0 25px rgba(255,255,255,0.3);
    margin-bottom: 20px;
}

hr {
    width: 100px;
    margin: 20px auto;
    border: 1px solid rgba(255,255,255,0.5);
}

p {
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: rgba(255,255,255,0.8);
}

.description {
    margin: 40px 0;
    max-width: 800px;
}

.description h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.9);
    letter-spacing: 1px;
}

.description p {
    font-size: 1.3rem;
    line-height: 1.6;
    margin-bottom: 30px;
    color: rgba(255,255,255,0.8);
}

.cta-button {
    background: linear-gradient(45deg, #0d4fff, #1b2a5a);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: bold;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
    display: inline-block;
    margin-top: 30px;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(13, 79, 255, 0.3);
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 60px 0;
    max-width: 1000px;
    width: 100%;
}

.feature {
    background: rgba(255,255,255,0.05);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
    background: rgba(255,255,255,0.08);
}

.feature h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #0d4fff;
    font-weight: bold;
}

.feature p {
    font-size: 1rem;
    line-height: 1.5;
    color: rgba(255,255,255,0.8);
    margin: 0;
}

.tagline {
    margin-top: 50px;
    font-style: italic;
    opacity: 0.8;
}

.tagline p {
    font-size: 1.1rem;
    margin: 0;
}

footer {
    padding: 20px;
    background: rgba(0,0,0,0.4);
    text-align: center;
    font-size: 1rem;
}

a {
    color: #fff;
    text-decoration: underline;
}

@media(max-width: 600px) {
    h1 { font-size: 4rem; }
    p { font-size: 1.2rem; }
    .description h2 { font-size: 2rem; }
    .features { grid-template-columns: 1fr; gap: 20px; }
    .feature { padding: 20px; }
    .back-link { position: relative; top: 0; left: 0; margin-bottom: 20px; }
}