:root {
    --primary: #6c5ce7;
    --primary-dark: #5649c0;
    --primary-light: rgba(108, 92, 231, 0.1);
    --secondary: #00cec9;
    --dark: #2d3436;
    --light: #f5f6fa;
    --gray: #636e72;
    --light-gray: #dfe6e9;
    --border-radius: 12px;
    --shadow: 0 8px 24px rgba(0,0,0,0.1);
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    min-height: 100vh;
}

.app-container {
    display: grid;
    grid-template-columns: 380px 1fr;
    min-height: 100vh;
    width: 100%;
    transition: var(--transition);
    gap: 10px;
    padding: 10px;
}

/* sidebar14 Styles */
.sidebar14 {
    background: white;
    border-right: 1px solid var(--light-gray);
    padding: 5px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--light-gray);
    padding: 10px;
    border-radius: var(--border-radius);
}

.sidebar14-header {
    margin-bottom: 25px;
}

.sidebar14-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 5px;
}

.sidebar14-title i {
    font-size: 1.4rem;
}

.sidebar14-subtitle {
    color: var(--gray);
    font-size: 0.9rem;
}

.settings-container {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
}

.settings-section {
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--light-gray);
}

.settings-section:last-child {
    border-bottom: none;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.section-title i {
    font-size: 1rem;
}

.form-group {
    margin-bottom: 15px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    transition: var(--transition);
    background: white;

}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.2);
    outline: none;
}

.range-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.range-slider {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    background: var(--light-gray);
    border-radius: 3px;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.2);
}

.range-value {
    width: 40px;
    text-align: center;
    font-weight: 600;
    color: var(--primary);
    font-size: 0.9rem;
}

.checkbox-container {
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    cursor: pointer;
}

.checkbox-container input {
    margin-right: 8px;
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.btn-group {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    gap: 8px;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.2);
    flex: 1;
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 16px rgba(108, 92, 231, 0.3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(108, 92, 231, 0.1);
    color: var(--primary);
    flex: 1;
}

.btn-secondary:hover {
    background: rgba(108, 92, 231, 0.2);
}

.btn i {
    font-size: 1rem;
}

/* Main Content Styles */
.main-content {
    padding: 30px;
    background: var(--light);
    display: flex;
    flex-direction: column;
    gap: 20px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
}

.upload-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 25px;
}

.upload-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.upload-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--dark);
}

.status-message {
    padding: 12px 15px;
    border-radius: var(--border-radius);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.status-success {
    background: rgba(46, 213, 115, 0.15);
    color: #2ed573;
}

.status-error {
    background: rgba(255, 71, 87, 0.15);
    color: #ff4757;
}

.status-warning {
    background: rgba(255, 165, 2, 0.15);
    color: #ffa502;
}

.drop-zone {
    border: 2px dashed var(--primary);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 15px;
    background: var(--primary-light);
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.drop-zone:hover {
    background: rgba(108, 92, 231, 0.15);
}

.drop-zone:hover::before {
    transform: scaleX(1);
}

.drop-zone.active {
    border-color: var(--secondary);
    background: rgba(0, 206, 201, 0.1);
}

.upload-icon {
    font-size: 42px;
    color: var(--primary);
    margin-bottom: 12px;
    transition: var(--transition);
}

.drop-zone:hover .upload-icon {
    transform: scale(1.1);
}

.upload-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark);
}

.upload-subtext {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 15px;
}

.file-input {
    display: none;
}

.file-input-label {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    font-size: 0.9rem;
}

.file-input-label:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
}

.file-info {
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--gray);
    display: flex;
    justify-content: space-between;
    background: rgba(108, 92, 231, 0.05);
    padding: 10px 15px;
    border-radius: var(--border-radius);
}

/* Preview Container */
.preview-container {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 25px;
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.preview-section {
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.preview-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-title i {
    color: var(--primary);
    font-size: 1rem;
}

.preview-size {
    font-size: 0.8rem;
    color: var(--gray);
    background: rgba(108, 92, 231, 0.1);
    padding: 3px 8px;
    border-radius: 4px;
}

.thumbnail-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 20px;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--light-gray);
}

.thumbnail-container::before {
    content: 'PREVIEW';
    position: absolute;
    top: 10px;
    left: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
}

.preview-image {
    max-width: 100%;
    max-height: 280px;
    border-radius: var(--border-radius);
    display: block;
    margin: 0 auto;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: var(--transition);
    object-fit: contain;
}

.preview-image:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.preview-placeholder {
    width: 100%;
    height: 200px;
    background: var(--primary-light);
    border: 2px dashed var(--primary);
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    transition: var(--transition);
}

.preview-placeholder:hover {
    background: rgba(108, 92, 231, 0.15);
}

.preview-placeholder i {
    font-size: 36px;
    margin-bottom: 10px;
    color: var(--primary);
    transition: var(--transition);
}

.preview-placeholder:hover i {
    transform: scale(1.1);
}

.preview-info {
    margin-top: 15px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 0.85rem;
}

.info-label {
    font-weight: 500;
    color: var(--dark);
}

.info-value {
    color: var(--gray);
}

/* Preset Buttons */
.preset-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 15px;
}

.preset-btn {
    padding: 8px;
    border-radius: 6px;
    background: white;
    border: 1px solid var(--light-gray);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.8rem;
    text-align: center;
}

.preset-btn:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.preset-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Responsive Styles */
@media (max-width: 1200px) {
    .app-container {
        grid-template-columns: 1fr;
    }
    
    .sidebar14 {
        border-bottom: 1px solid var(--light-gray);
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 20px;
    }
    
    .preview-container {
        grid-template-columns: 1fr;
    }
    
    .drop-zone {
        padding: 30px 15px;
    }
    
    .btn-group {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .preset-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}