:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #f8fafc;
    --text-color: #1e293b;
    --light-gray: #e2e8f0;
    --medium-gray: #94a3b8;
    --dark-gray: #475569;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.main-heading {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.main-heading::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    border-radius: 2px;
}

.scale-details {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
}

.scale-name {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
    text-align: center;
    margin: 1.5rem 0;
    padding: 0.5rem;
    background-color: rgba(37, 99, 235, 0.05);
    border-radius: var(--border-radius);
}

.description-container {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 1.5rem 0;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.description-content {
    padding: 1.5rem;
    white-space: pre-wrap;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-color);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    height: 0;
    overflow: hidden;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-placeholder {
    width: 100%;
    height: 100%;
    background-color: var(--light-gray);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--medium-gray);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--border-radius);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .main-heading {
        font-size: 2rem;
    }

    .action-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }

    .btn {
        width: 100%;
    }

    /* Enhanced horizontal scrolling for description */
    .description-container {
        border-radius: 0;
        margin-left: -1rem;
        margin-right: -1rem;
        width: calc(100% + 2rem);
    }
    
    .description-content {
        padding: 1rem;
        white-space: pre-wrap;
        min-width: 100%;
    }
}