/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 2rem;
}

#content {
    max-width: 1200px;
    margin: 0 auto;
}

/* Container query setup */
.article {
    container-type: inline-size;
    container-name: article;
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    resize: horizontal;
    overflow: auto;
    min-width: 300px;
    border: 3px dashed #ccc;
}

.article h1 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 2rem;
}

.article > p {
    margin-bottom: 2rem;
    color: #666;
    font-size: 1.1rem;
}

/* Card styling */
.card {
    background: linear-gradient(135deg, #ff6b6b, #ee5a24);
    color: white;
    padding: 1.5rem;
    border-radius: 8px;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    position: relative;
}

.card::before {
    content: "Small container (< 500px)";
    position: absolute;
    top: -25px;
    right: 0;
    background: #34495e;
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
}

.card h2 {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.card p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Container queries */
@container article (min-width: 500px) {
    .card {
        flex-direction: column;
        text-align: center;
        background: linear-gradient(135deg, #4ecdc4, #44a08d);
        font-size: max(1.2rem, 1em + 2cqi);
    }

    .card::before {
        content: "Medium container (≥ 500px)";
        background: #27ae60;
    }

    .card h2 {
        font-size: 1.5rem;
    }
}

@container article (min-width: 700px) {
    .card {
        background: linear-gradient(135deg, #a8edea, #fed6e3);
        color: #2c3e50;
        padding: 2.5rem;
        font-size: max(1.4rem, 1em + 3cqi);
    }

    .card::before {
        content: "Large container (≥ 700px)";
        background: #8e44ad;
        color: white;
    }

    .card h2 {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
}

@container article (min-width: 900px) {
    .card {
        background: linear-gradient(135deg, #ffecd2, #fcb69f);
        color: #2c3e50;
        padding: 3rem;
        font-size: max(1.6rem, 1em + 4cqi);
        border-radius: 16px;
    }

    .card::before {
        content: "Extra Large container (≥ 900px)";
        background: #e74c3c;
        color: white;
    }

    .card h2 {
        font-size: 2.5rem;
        margin-bottom: 1.5rem;
    }
}

/* Instructions */
.instructions {
    background: rgba(255, 255, 255, 0.9);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border-left: 4px solid #3498db;
}

.instructions h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.instructions p {
    color: #666;
    margin-bottom: 0.5rem;
}

.cq-units {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem;
    border-radius: 8px;
    margin-top: 2rem;
    font-size: 0.9rem;
}

.cq-units h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.cq-units ul {
    list-style-type: none;
    padding-left: 0;
}

.cq-units li {
    padding: 0.25rem 0;
    color: #555;
}

.cq-units code {
    background: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Monaco', 'Menlo', monospace;
    color: #e74c3c;
    font-weight: bold;
}