/* Modern styles.css */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --background: #fafafa;
    --surface: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --border: #e5e7eb;
    --success: #10b981;
    --error: #ef4444;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    background-color: var(--surface);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    transition: box-shadow 0.2s ease;
}

.container:hover {
    box-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

h1 {
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 40px;
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.upload-section {
    text-align: center;
    padding: 48px;
    border: 2px dashed var(--border);
    border-radius: 12px;
    margin-bottom: 40px;
    background-color: var(--background);
    transition: all 0.2s ease;
}

.upload-section:hover {
    border-color: var(--primary-color);
    background-color: #fafbff;
}

.upload-button {
    background-color: var(--primary-color);
    color: white;
    padding: 14px 28px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

.upload-button:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

.upload-button:active {
    transform: translateY(0);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.result-section {
    background-color: var(--surface);
    padding: 24px;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}

.result-section:hover {
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    border-color: var(--primary-color);
}

.result-section h2 {
    color: var(--text-primary);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.025em;
}

#suggestions {
    grid-column: 1 / -1;
}

.loading {
    display: none;
    text-align: center;
    margin: 32px 0;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    body {
        padding: 16px;
    }
    
    .container {
        padding: 24px;
    }
    
    .upload-section {
        padding: 32px;
    }
    
    h1 {
        font-size: 1.875rem;
    }
}