:root {
    --bg-dark: #020611;
    --accent-blue: #7bb9fa;
    --text-muted: #a1a1aa;
}

body, html {
    margin: 0;
    padding: 0;
    min-height: 100%;
    color: white;
    font-family: 'Inter', sans-serif;
    overflow-x: hidden;

    
    background:
        radial-gradient(circle at 50% 30%, rgba(120, 180, 255, 0.25), transparent 40%),
        radial-gradient(circle at 80% 10%, rgba(100, 140, 255, 0.15), transparent 40%),
        linear-gradient(180deg, #050b18 0%, #020611 60%, #00030a 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(circle at 50% 40%, rgba(120, 180, 255, 0.12), transparent 45%),
        radial-gradient(circle at 20% 20%, rgba(100, 160, 255, 0.08), transparent 40%);
}

#world {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 0;
}



#world {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 0;
}


nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 25px 80px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    box-sizing: border-box;
}

.logo { font-size: 1.2rem; letter-spacing: 3px; }
.logo strong { color: var(--accent-blue); }

.nav-links a {
    color: white;
    text-decoration: none;
    margin: 0 20px;
    font-size: 0.85rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.btn-enroll {
    background: transparent;
    border: 1px solid rgba(123, 185, 250, 0.5);
    color: white;
    padding: 8px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 0.85rem;
}


section {
    position: relative;
    height: 100vh;
    padding: 0 10%;
    z-index: 10;
}

.section-1 {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding-top: 15vh;
}

.sub-title {
    letter-spacing: 6px;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 10px;
}

h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 5.2rem;
    margin: 10px 0;
    letter-spacing: 6px;
    font-weight: 700;
}


.hero-content p {
    max-width: 550px;
    line-height: 1.6;
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

.btn-get-started {
    background: white;
    color: black;
    border: none;
    padding: 12px 35px;
    border-radius: 30px;
    font-weight: bold;
    letter-spacing: 1px;
    cursor: pointer;
}

.planet-context {
    position: absolute;
    bottom: 25%;
    width: 80%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 5px;
}

.scroll-indicator {
    border: 1px solid rgba(255,255,255,0.3);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.section-2 {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.details-content { max-width: 480px; }

.action-row {
    display: flex;
    align-items: center;
    gap: 20px;
}

.btn-learn-more {
    background: transparent;
    border: 1px solid white;
    color: white;
    padding: 12px 30px;
    border-radius: 30px;
    font-weight: bold;
    cursor: pointer;
}

.play-button {
    width: 45px;
    height: 45px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
}

.nav-links a {
    position: relative;
    transition: color 0.25s ease;
}

.nav-links a::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -6px;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-blue), transparent);
    transition: all 0.3s ease;
    transform: translateX(-50%);
    opacity: 0;
}

.nav-links a:hover {
    color: white;
}

.nav-links a:hover::after {
    width: 120%;
    opacity: 1;
}

.btn-enroll {
    transition: all 0.3s ease;
}

.btn-enroll:hover {
    background: rgba(123, 185, 250, 0.15);
    box-shadow: 0 0 15px rgba(123, 185, 250, 0.4);
    border-color: rgba(123, 185, 250, 0.9);
}

.btn-learn-more {
    transition: all 0.3s ease;
}

.btn-learn-more:hover {
    background: rgba(123, 185, 250, 0.12);
    border-color: rgba(123, 185, 250, 0.9);
    box-shadow: 0 0 18px rgba(123, 185, 250, 0.4);
    transform: translateY(-2px);
}

.play-button {
    transition: all 0.3s ease;
}

.play-button:hover {
    background: rgba(123, 185, 250, 0.25);
    box-shadow: 0 0 20px rgba(123, 185, 250, 0.6);
    transform: scale(1.08);
}