:root {
    --bg-color: #0f0f0f;
    --card-bg: #1e1e1e;
    --text-main: #ffffff;
    --text-dim: #aaaaaa;
    --accent: #00FFFF; 
}

body {
    font-family: 'Roboto', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

header h1 span {
    color: var(--accent);
}

header p {
    color: var(--text-dim);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    text-align: left;
    transition: transform 0.2s ease, background 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    background: #2a2a2a;
    border-color: #333;
}

.card h3 {
    margin: 10px 0 5px 0;
    font-size: 1.2rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.4;
}
.card .tag {
    display: inline-block;
    background: #333;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    text-transform: uppercase;
    margin-top: 15px;
}
#quote-container {
    background: linear-gradient(145deg, #1e293b, #0f172a);
    padding: 2rem;
    border-radius: 15px;
    border-left: 5px solid #00FFFF; /* YouTube Red accent */
    max-width: 800px;
    margin: 20px auto 40px auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

#science-quote {
    font-size: 1.4rem;
    font-style: italic;
    color: #f8fafc;
    margin-bottom: 10px;
}

#quote-author {
    display: block;
    color: #38bdf8;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}