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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #dbeafe 0%, #eff6ff 100%);
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 3rem 2rem;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 0.5rem;
    line-height: 1.3;
}

.tagline {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 1rem;
    font-weight: 300;
}

.tagline .highlight {
    color: #3b82f6;
    font-weight: 500;
}

.authors {
    font-size: 1rem;
    color: #64748b;
    margin-bottom: 2rem;
    line-height: 1.5;
}

.authors a {
    color: #3b82f6;
    text-decoration: none;
}

.authors a:hover {
    text-decoration: underline;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: #1e40af;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(30, 64, 175, 0.3);
}

.btn:hover {
    background: #1e3a8a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.4);
}

.btn svg {
    width: 20px;
    height: 20px;
}

@media (max-width: 640px) {
    .container {
        padding: 2rem 1.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 1.1rem;
    }
}