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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    width: 100%;
}

h1 {
    color: #667eea;
    text-align: center;
    font-size: 2.5em;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #666;
    font-size: 1.2em;
    margin-bottom: 30px;
}

.video-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.video-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border: none;
    border-radius: 10px;
    font-size: 1.1em;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.video-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.4);
}

.video-btn.unavailable {
    background: linear-gradient(135deg, #999 0%, #666 100%);
}

.video-btn.unavailable:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 15px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    position: relative;
    animation: slideDown 0.3s ease;
}

.modal-content.video-modal {
    max-width: 90%;
    width: 1000px;
    padding: 20px;
}

.modal-content.video-modal h2 {
    margin-bottom: 15px;
    color: #667eea;
}

#videoPlayer {
    width: 100%;
    max-height: 70vh;
    border-radius: 10px;
    background-color: #000;
}

@keyframes slideDown {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    color: #aaa;
    position: absolute;
    right: 15px;
    top: 10px;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #000;
}

.modal-content h2 {
    color: #764ba2;
    margin-bottom: 15px;
}

.modal-content p {
    color: #666;
    font-size: 1.1em;
}

/* Responsive */
@media (max-width: 600px) {
    h1 {
        font-size: 2em;
    }
    
    .container {
        padding: 25px;
    }
    
    .video-buttons {
        grid-template-columns: 1fr;
    }

    .modal-content.video-modal {
        width: 95%;
        padding: 15px;
    }

    #videoPlayer {
        max-height: 50vh;
    }
}