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

:root {
    --bg-dark: #0f172a;
    --bg-container: #1e293b;
    --text-light: #e2e8f0;
    --text-white: #ffffff;
    --accent-green: #22c55e;
    --accent-green-hover: #16a34a;
    --card-bg: #334155;
    --border-radius: 12px;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: 'Inter', Arial, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 30px;
    background-color: var(--bg-container);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: var(--text-white);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

h2 {
    color: var(--text-white);
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.subtitle, 
.example-subtitle {
    color: var(--text-light);
    font-size: 1rem;
    opacity: 0.8;
    text-align: center;
    margin-bottom: 20px;
}

.upload-section {
    text-align: center;
    margin-bottom: 30px;
}

/* Style Selector */
.style-selector {
    margin-bottom: 40px;
    padding: 20px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.style-title {
    font-size: 1.1rem;
    color: var(--text-white);
    margin-bottom: 15px;
    font-weight: 500;
}

.style-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto;
}

.style-button {
    padding: 10px 16px;
    border: none;
    border-radius: 6px;
    background-color: #475569;
    color: var(--text-white);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    height: 100%;
    min-height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.style-button:hover {
    background-color: #64748b;
    transform: translateY(-2px);
}

.style-button.active {
    background-color: var(--accent-green);
    font-weight: 600;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    background-color: var(--card-bg);
    color: var(--text-white);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.file-input-label:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 20px -3px rgba(0, 0, 0, 0.1), 0 8px 8px -2px rgba(0, 0, 0, 0.05);
}

.file-input-icon {
    margin-right: 12px;
    font-size: 1.2rem;
}

#imageInput {
    display: none;
}

/* Example Output Section */
.example-section {
    margin-bottom: 40px;
    padding: 20px;
    background-color: var(--bg-container);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.example-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 25px;
}

.example-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.example-image-wrapper {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 12px;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 15px;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.example-image {
    max-width: 100%;
    height: auto;
    border-radius: 6px;
}

.example-caption {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-white);
    margin-top: 8px;
}

.image-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.image-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.image-card h3 {
    padding: 16px;
    text-align: center;
    background-color: rgba(0, 0, 0, 0.2);
    color: var(--text-white);
    font-weight: 600;
}

.image-wrapper {
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

#originalImage,
#outputCanvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

#downloadBtn {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    background-color: var(--accent-green);
    color: var(--text-white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

#downloadBtn:hover:not(:disabled) {
    background-color: var(--accent-green-hover);
    transform: translateY(-2px);
}

#downloadBtn:disabled {
    background-color: #475569;
    cursor: not-allowed;
    opacity: 0.7;
}

.download-icon {
    margin-right: 8px;
}

footer {
    text-align: center;
    margin-top: auto;
    padding-top: 20px;
    color: var(--text-light);
    opacity: 0.7;
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-container {
        padding: 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .image-container, 
    .example-container {
        grid-template-columns: 1fr;
    }
    
    .example-section {
        padding: 15px;
    }

    .style-buttons {
        grid-template-columns: 1fr;
    }
}