:root {
    --primary-color: #6366f1;
    --secondary-color: #818cf8;
    --background-color: #f3f4f6;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --card-bg: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.hero {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
    padding-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.hero p {
    color: #64748b;
    max-width: 800px;
    margin: 0 auto;
}

.hero-border {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 800px;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--primary-color), transparent);
}

.upload-container {
    max-width: 1000px;
    margin: 0 auto;
}

.card {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    padding: 2rem;
}

.flex-container {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.upload-section {
    flex: 1;
}

.upload-area {
    border: 2px dashed #e5e7eb;
    border-radius: 0.5rem;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #f9fafb;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.upload-area:hover, .upload-area.drag-over {
    border-color: var(--primary-color);
    background-color: #f3f4f6;
}

.upload-icon {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-text p {
    margin-bottom: 0.5rem;
}

.upload-formats {
    color: #64748b;
    font-size: 0.875rem;
}

.file-input {
    display: none;
}

.preview-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: #f9fafb;
    border-radius: 0.5rem;
}

.music-icon {
    margin-bottom: 1rem;
}

.preview-text {
    color: #64748b;
    font-size: 0.875rem;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.sound-input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    outline: none;
}

.sound-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.1);
}

.generate-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: background-color 0.3s ease;
    text-decoration: none;
}

.btn-icon {
    font-size: 1.25rem;
}

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

@media (max-width: 768px) {
    .hero h1 {
        font-size: 1.75rem;
    }
    
    main {
        padding: 1rem;
    }
    
    .card {
        padding: 1rem;
    }
    
    .flex-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .upload-area {
        padding: 1.5rem;
    }
}