/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, 'Helvetica Neue', 'Segoe UI', 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', sans-serif;
    background-color: #121212;
    color: #FFFFFF;
    line-height: 1.6;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #f0f0f0;
}

/* Main Content */
main {
    max-width: 1200px;
    margin: 0 auto;
}

.recommendation-controls {
    text-align: center;
    margin-bottom: 40px;
}

#recommend-btn {
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 600;
    padding: 15px 30px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    background-image: linear-gradient(45deg, #FF416C, #FF4B2B);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, box-shadow 0.2s;
}

#recommend-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 65, 108, 0.4);
}

/* Music Grid */
.music-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    #recommend-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}