:root[data-theme="dark"] {
    --text: #f8fafc;
    --dna-primary: #76B900;
    --dna-secondary: #ffffff;
    --dna-bg: #0b0b0b;
    --line-color: rgba(118, 185, 0, 0.3);
    --card-bg: #121212; 
}

:root[data-theme="light"] {
    --text: #1a1a1a;
    --dna-primary: #76B900;
    --dna-secondary: #333333;
    --dna-bg: #f5f5f5;
    --line-color: rgba(0, 0, 0, 0.1);
    --card-bg: #f8f9fa;
}

body {
    background-color: var(--dna-bg);
    color: var(--text);
    transition: background-color 0.4s ease;
    font-family: 'Inter', system-ui, sans-serif;
    margin: 0;
    overflow-x: hidden;
}

/* Nav & Layout */
nav {
    display: flex;
    justify-content: space-between;
    padding: 20px 2rem;
    align-items: center;
}

.container { max-width: 800px; margin: 0 auto; padding: 40px 20px; }

#theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--dna-primary);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text);
}

/* DNA Animation Elements */
.node {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.strand-1 { background-color: var(--dna-primary); box-shadow: 0 0 12px var(--dna-primary); }
.strand-2 { background-color: var(--dna-secondary); box-shadow: 0 0 8px var(--dna-secondary); transition: background-color 0.4s ease; }
.connector { position: absolute; height: 2px; transform-origin: left center; z-index: 1; background: var(--line-color); }

/* Hero Section */
.hero {
    position: relative;
    width: 100%;
    height: 85vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.hero-text {
    position: absolute;
    z-index: 10;
    text-align: center;
}

.hero-text h1 { font-size: clamp(2.5rem, 8vw, 5rem); margin: 0; color: var(--text); }
.highlight { color: var(--dna-primary); }
.hero-text p { color: var(--text); opacity: 0.9; }

.social-links { display: flex; gap: 20px; justify-content: center; margin-top: 15px; }
.social-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: 0.3s;
}
.social-links a:hover { color: var(--dna-primary); transform: translateY(-2px); }

#helix-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    height: 100%;
    opacity: 0.5;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    transition: 0.5s;
}
.scroll-indicator.hidden { opacity: 0; }
.mouse { width: 26px; height: 40px; border: 2px solid var(--dna-primary); border-radius: 15px; margin: 0 auto 10px; position: relative; }
.wheel { width: 4px; height: 8px; background: var(--dna-primary); border-radius: 2px; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); animation: scroll-anim 1.5s infinite; }

@keyframes scroll-anim {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(15px); }
}

/* Roadmap Skeleton */
.roadmap-skeleton { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 30px; }
.skeleton-card { background: var(--card-bg); padding: 25px; border-radius: 15px; border: 1px solid rgba(118, 185, 0, 0.1); transition: 0.3s; }
.skeleton-card:hover { border-color: var(--dna-primary); transform: translateY(-5px); box-shadow: 0 10px 20px rgba(0,0,0,0.2); }
.skeleton-card-link { text-decoration: none; color: inherit; }
.skeleton-icon { width: 40px; height: 40px; border-radius: 50%; background: #2a2a2a; margin-bottom: 15px; }
.status-text { font-style: italic; opacity: 0.6; text-align: center; margin-top: 30px; }