:root {
    --primary-color: #4361ee;
    --secondary-color: #3f37c9;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4cc9f0;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

.itpc-converter-wrapper * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.itpc-converter-wrapper {
    background-color: #f5f7ff;
    color: var(--dark-color);
    line-height: 1.6;
    padding: 20px;
}

.converter-wrapper {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
    gap: 2rem;
}

.main-content {
    flex: 1;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
}

.options-panel {
    width: 350px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 1.5rem;
}

.options-panel.hidden {
    display: none;
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.header p {
    color: #6c757d;
}

.upload-area {
    border: 2px dashed #adb5bd;
    border-radius: var(--border-radius);
    padding: 3rem 1rem;
    text-align: center;
    margin-bottom: 2rem;
    cursor: pointer;
    transition: var(--transition);
    background-color: rgba(67, 97, 238, 0.05);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(67, 97, 238, 0.1);
}

.upload-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-area h3 {
    margin-bottom: 0.5rem;
    color: var(--dark-color);
}

.upload-area p {
    color: #6c757d;
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.7rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.btn-secondary {
    background: #6c757d;
}

.btn-secondary:hover {
    background: #5a6268;
}

.option-group {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 1.5rem;
}

.option-group h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.radio-group, .checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.radio-option, .checkbox-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

input[type="radio"], input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--primary-color);
}

.preview-container {
    margin-top: 2rem;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.preview-header h3 {
    color: var(--primary-color);
}

.preview-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.image-preview {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    aspect-ratio: 1;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-image {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(220, 53, 69, 0.8);
    color: white;
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
}

.image-preview:hover .remove-image {
    opacity: 1;
}

.action-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

.hidden {
    display: none;
}

.pdf-preview-container {
    margin-top: 1.5rem;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    padding: 1rem;
    background-color: #f9f9f9;
}

.pdf-preview-title {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
    text-align: center;
}

.pdf-preview {
    position: relative;
    margin: 0 auto;
    background-color: white;
    box-shadow: 0 0 8px rgba(0,0,0,0.1);
    overflow: hidden;
    border: 1px solid #ccc;
}

.pdf-preview.fit {
    width: 150px;
    height: 200px;
}

.pdf-preview.a4 {
    width: 148px;
    height: 210px;
}

.pdf-preview.us-letter {
    width: 140px;
    height: 182px;
}

.pdf-preview-image {
    position: absolute;
    background-color: #e9ecef;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #adb5bd;
    font-size: 0.8rem;
}

.pdf-preview.no-margin .pdf-preview-image {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.pdf-preview.small-margin .pdf-preview-image {
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
}

.pdf-preview.big-margin .pdf-preview-image {
    top: 40px;
    left: 40px;
    right: 40px;
    bottom: 40px;
}

.pdf-preview.portrait {
    /* Default is portrait */
}

.pdf-preview.landscape {
    transform: rotate(90deg) translateY(-100%);
    transform-origin: top left;
    margin-left: 100px;
}

.pdf-preview.landscape.fit {
    width: 200px;
    height: 150px;
}

.pdf-preview.landscape.a4 {
    width: 210px;
    height: 148px;
}

.pdf-preview.landscape.us-letter {
    width: 182px;
    height: 140px;
}

@media (max-width: 992px) {
    .converter-wrapper {
        flex-direction: column;
    }

    .options-panel {
        width: 100%;
        order: -1;
    }
}

@media (max-width: 768px) {
    .main-content, .converter-wrapper {
        padding: 1rem;
        margin: 1rem;
    }

    .preview-images {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}