:root {
    --primary-color: #4a6bff;
    --secondary-color: #f8f9fa;
    --text-color: #333;
    --light-text: #777;
    --border-color: #ddd;
    --error-color: #ff4444;
    --success-color: #00c851;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.tool-selector {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 10px;
}

.tool-btn {
    padding: 12px 20px;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tool-btn:hover {
    background-color: #f0f0f0;
}

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

.tool-section {
    background-color: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 30px;
    display: none;
}

.tool-section.active {
    display: block;
}

.tool-section h2 {
    margin-bottom: 20px;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 20px;
    position: relative;
}

.upload-area.small {
    padding: 20px;
}

.upload-area:hover {
    border-color: var(--primary-color);
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(74, 107, 255, 0.1);
}

.upload-area i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-area p {
    color: var(--light-text);
    margin-bottom: 10px;
}

.upload-area input[type="file"] {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    opacity: 0;
    cursor: pointer;
}

.options {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.options label, .options select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
}

.preview-container {
    margin: 20px 0;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
    min-height: 100px;
}

.image-container {
    display: inline-block;
    margin: 10px;
    text-align: center;
}

.preview-image {
    max-width: 150px;
    max-height: 150px;
    display: block;
    margin-bottom: 5px;
}

.file-name {
    font-size: 12px;
    color: var(--light-text);
    word-break: break-all;
}

.file-preview {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
}

.action-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: background-color 0.3s ease;
    width: 100%;
    margin-top: 15px;
}

.action-btn:hover {
    background-color: #3a5ae8;
}

.signature-options {
    margin: 20px 0;
}

.signature-method {
    margin-bottom: 20px;
}

.signature-method div {
    margin: 10px 0;
}

.signature-section {
    margin: 20px 0;
}

#signature-pad {
    border: 1px solid var(--border-color);
    border-radius: 5px;
    width: 100%;
    background-color: white;
}

.canvas-controls {
    margin-top: 10px;
    display: flex;
    gap: 10px;
}

.canvas-controls button {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.position-options {
    margin: 20px 0;
}

.position-options select, .position-options input {
    margin-left: 10px;
    padding: 5px;
}

.merge-order {
    margin: 20px 0;
}

.sort-btn {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
    margin-bottom: 10px;
}

.sort-btn:hover {
    background-color: #e9ecef;
}

.rotation-options {
    margin: 20px 0;
}

.rotation-btns {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.rotate-btn {
    padding: 10px 15px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.rotate-btn:hover {
    background-color: #e9ecef;
}

#download-section {
    text-align: center;
    margin: 30px 0;
}

.download-btn {
    max-width: 300px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

footer {
    background-color: var(--secondary-color);
    padding: 20px 0;
    text-align: center;
    color: var(--light-text);
    font-size: 0.9rem;
    margin-top: 50px;
}

.signature-preview-container {
    margin-top: 20px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
}

.preview-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

.page-preview {
    position: relative;
    width: 300px;
    height: 400px;
    border: 1px solid var(--border-color);
    background-color: white;
}

#page-preview-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

#signature-preview {
    pointer-events: none;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 4px;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.toast.show {
    opacity: 1;
}

/* Responsive styles */
@media (max-width: 768px) {
    .tool-selector {
        flex-direction: column;
    }
    
    .options {
        flex-direction: column;
    }
    
    .rotation-btns {
        flex-direction: column;
    }
}
/* Add these new styles to your existing CSS */

/* File upload feedback */
.upload-area.has-file {
    border-color: var(--success-color);
    background-color: rgba(0, 200, 81, 0.05);
}

.upload-feedback {
    margin-top: 10px;
    font-size: 14px;
    color: var(--primary-color);
}

.upload-feedback i {
    margin-right: 5px;
}

/* Signature position controls */
.signature-position-controls {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.position-slider {
    flex: 1;
}

.position-slider label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
}

/* PDF preview */
.pdf-preview-container {
    margin-top: 20px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 15px;
}

.pdf-preview-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

.pdf-page {
    position: relative;
    width: 100%;
    max-width: 300px;
    height: 400px;
    border: 1px solid var(--border-color);
    background-color: white;
    overflow: hidden;
}

#pdf-preview-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.page-controls {
    display: flex;
    justify-content: center;
    margin-top: 10px;
    gap: 10px;
}

.page-controls button {
    padding: 5px 10px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}