@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&display=swap');

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --background-color: #ecf0f1;
    --text-color: #34495e;
    --card-background: #ffffff;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --font-family: 'Noto Sans KR', sans-serif;
}

body.dark-mode {
    --primary-color: #9b59b6;
    --secondary-color: #27ae60;
    --background-color: #2c3e50;
    --text-color: #ecf0f1;
    --card-background: #34495e;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: background-color 0.3s ease, color 0.3s ease; /* Smooth transition for theme change */
}

#theme-toggle {
    background-color: var(--card-background);
    color: var(--text-color);
    border: 1px solid var(--primary-color);
    border-radius: 5px;
    padding: 8px 12px;
    font-size: 1.2em;
    cursor: pointer;
    position: absolute;
    top: 20px;
    right: 20px;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

#theme-toggle:hover {
    background-color: var(--primary-color);
    color: var(--card-background);
}

header {
    text-align: center;
    margin-bottom: 40px;
    position: relative; /* To position the theme toggle button */
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 0;
}

main {
    width: 100%;
    max-width: 1200px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

@media (min-width: 768px) {
    main {
        grid-template-columns: 300px 1fr;
    }
}

#input-section, #recommendation-section {
    background-color: var(--card-background);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-top: 0;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

input[type="number"], select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 15px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #27ae60;
}

#recommendation-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.recommendation-card {
    background-color: #f9f9f9;
    border: 1px solid #eee;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px var(--shadow-color);
    text-align: center;
}

.recommendation-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.recommendation-card h3 {
    margin: 15px 0 10px;
    color: var(--text-color);
}

.recommendation-card p {
    padding: 0 15px 15px;
    margin: 0;
    color: #7f8c8d;
}

footer {
    text-align: center;
    margin-top: 40px;
    color: #95a5a6;
}