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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

h1 {
    color: #2d3748;
    margin-bottom: 10px;
    font-size: 2rem;
}

.description {
    color: #718096;
    margin-bottom: 30px;
    line-height: 1.6;
}

.iframe-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
    background: #000;
    border-radius: 8px;
    overflow: hidden;
    margin-bottom: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

#watermark-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.controls {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: #48bb78;
    color: white;
}

.btn-primary:hover {
    background: #38a169;
}

.btn-secondary {
    background: #ed8936;
    color: white;
}

.btn-secondary:hover {
    background: #dd6b20;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

.info {
    background: #f7fafc;
    border-left: 4px solid #667eea;
    padding: 20px;
    border-radius: 6px;
}

.info h3 {
    color: #2d3748;
    margin-bottom: 15px;
    font-size: 1.25rem;
}

.info p {
    color: #4a5568;
    margin-bottom: 10px;
    line-height: 1.6;
}

.info p:last-child {
    margin-bottom: 0;
}

#status {
    font-weight: 600;
    color: #667eea;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .controls {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}