:root {
    --primary-color: #4A90E2; /* A calming blue */
    --secondary-color: #50E3C2; /* A gentle, encouraging teal */
    --background-color: #F7F9FB; /* A very light, soft grey */
    --text-color: #333333;
    --heading-font: 'Montserrat', sans-serif;
    --body-font: 'Lato', sans-serif;
    --card-shadow: 0 10px 20px rgba(0,0,0,0.1), 0 6px 6px rgba(0,0,0,0.15);
    --interactive-glow: 0 0 15px rgba(74, 144, 226, 0.5);
}

body {
    font-family: var(--body-font);
    margin: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
    font-family: var(--heading-font);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 2rem;
}

main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
}

.card {
    background-color: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

h2 {
    font-family: var(--heading-font);
    color: var(--primary-color);
    margin-top: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
    color: #555;
}

textarea, input[type="text"], select {
    width: 100%;
    padding: 1rem;
    border: 1px solid #ccc;
    border-radius: 8px;
    transition: box-shadow 0.3s ease;
    font-family: var(--body-font);
}

textarea:focus, input[type="text"]:focus, select:focus {
    outline: none;
    box-shadow: var(--interactive-glow);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-family: var(--body-font);
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    margin-top: 0.5rem;
}

button:hover {
    background-color: #357ABD; /* A slightly darker blue for hover */
    box-shadow: var(--interactive-glow);
}

.template-section {
    margin-top: 2rem;
    border-top: 1px solid #eee;
    padding-top: 1rem;
}

.template-section h3 {
    font-family: var(--heading-font);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
}


.print-btn {
    background-color: var(--secondary-color);
}

.print-btn:hover {
    background-color: #45B8A0; /* Darker teal for hover */
}

@container (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }
}

#homework-output {
    container-type: inline-size;
}

/* Add a subtle texture to the background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="4" height="4" viewBox="0 0 4 4"><path fill="%239C92AC" fill-opacity="0.05" d="M1 3h1v1H1V3zm2-2h1v1H3V1z"></path></svg>');
    z-index: -1;
}