:root {
    --primary-color: #4a90e2;
    --text-color: #333;
    --background-color: #f5f5f5;
    --container-background: #ffffff;
    --error-color: #ff4444;
    --success-color: #00c853;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
    margin: 0;
    font-size: 2rem;
}

.subtitle {
    margin: 0.5rem 0 0;
    font-size: 1rem;
    opacity: 0.9;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    gap: 1rem;
}

.video-container {
    background-color: var(--container-background);
    padding: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: relative;
}

#video {
    border-radius: 4px;
    max-width: 100%;
    height: auto;
}

canvas {
    position: absolute;
    left: 1rem;
    top: 1rem;
    border-radius: 4px;
}

.status {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    background-color: var(--container-background);
    color: var(--text-color);
}

.error {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    background-color: var(--error-color);
    color: white;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: var(--container-background);
    color: var(--text-color);
    box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

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

    .video-container {
        padding: 0.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }
}