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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2em;
    margin-bottom: 10px;
}

.content {
    padding: 30px;
}

.upload-section {
    border: 3px dashed #667eea;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    margin-bottom: 30px;
    background: #f8f9ff;
    transition: all 0.3s;
}

.upload-section:hover {
    border-color: #764ba2;
    background: #f0f2ff;
}

.upload-section input[type="file"] {
    display: none;
}

.upload-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    transition: transform 0.2s;
}

.upload-button:hover:not(:disabled) {
    transform: translateY(-2px);
}

.upload-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #ccc;
}

.status {
    margin: 20px 0;
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.status.waiting {
    background: #fff3cd;
    color: #856404;
}

.status.ready {
    background: #d4edda;
    color: #155724;
}

.status.signed {
    background: #d1ecf1;
    color: #0c5460;
}

.connection-status {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 12px;
}

.status-indicator {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 8px;
    animation: pulse 2s infinite;
}

.status-indicator.connected {
    background: #28a745;
}

.status-indicator.disconnected {
    background: #dc3545;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.page-navigation {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin: 20px 0;
    padding: 15px;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-radius: 12px;
    border: 2px solid #667eea;
    flex-wrap: wrap;
}

.nav-button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.nav-button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

#pageInfo {
    font-weight: bold;
    font-size: 1.2em;
    color: #667eea;
    min-width: 150px;
    text-align: center;
}

.page-jump {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 10px;
    padding-left: 15px;
    border-left: 2px solid rgba(102, 126, 234, 0.3);
}

#jumpToPageInput {
    width: 60px;
    padding: 8px;
    border: 2px solid #667eea;
    border-radius: 6px;
    text-align: center;
    font-size: 1em;
    font-weight: 500;
    color: #667eea;
}

#jumpToPageInput:focus {
    outline: none;
    border-color: #764ba2;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

.page-selector label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 8px 12px;
    background: white;
    border-radius: 6px;
    border: 2px solid #667eea;
    transition: all 0.2s;
}

.page-selector label:hover {
    background: #667eea15;
}

.page-selector input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.pdf-preview {
    margin-top: 30px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.pdf-preview.scrollable {
    max-height: 70vh;
    overflow-y: auto;
}

.pdf-preview canvas {
    width: 100%;
    display: block;
    margin: 10px 0;
}

.pdf-page-separator {
    text-align: center;
    margin: 15px 0;
    padding: 8px;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-radius: 6px;
    font-weight: bold;
    color: #667eea;
    font-size: 0.9em;
}

.signature-placeholder {
    background: white;
    border: 2px dashed #667eea;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 15px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.placeholder-icon {
    font-size: 1.8em;
    opacity: 0.7;
}

.placeholder-text {
    font-size: 0.9em;
    color: #667eea;
    font-weight: 500;
}

#placeholderSignatureImage {
    max-width: 200px;
    max-height: 80px;
    width: auto;
    height: auto;
    margin-top: 8px;
}

.signature-overlay {
    position: absolute;
    border: 3px dashed #667eea;
    background: rgba(255, 255, 255, 0.9);
    padding: 10px;
    cursor: move;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    display: none;
    z-index: 10;
}

.signature-overlay.show {
    display: block;
}

.signature-overlay img {
    display: block;
    max-width: 300px;
    height: auto;
    pointer-events: none;
}

.signature-overlay .text-overlay-content {
    position: absolute;
    top: 5px;
    left: 5px;
    font-size: 14px;
    color: #333;
    background: rgba(255, 255, 255, 0.9);
    padding: 5px 10px;
    border-radius: 4px;
    pointer-events: none;
    max-width: calc(100% - 20px);
    word-wrap: break-word;
    z-index: 11;
}

.signature-overlay .handle {
    position: absolute;
    top: -10px;
    right: -10px;
    background: #667eea;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 18px;
}

.signature-overlay .resize-handle {
    position: absolute;
    bottom: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    background: #667eea;
    cursor: nwse-resize;
    border-radius: 3px;
}

.text-input-section {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9ff;
    border-radius: 12px;
    border: 2px solid #667eea;
}

.signature-controls {
    margin-top: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    display: none;
}

.signature-controls.show {
    display: block;
}

.signature-controls p {
    margin-bottom: 15px;
    color: #666;
}

.download-button {
    background: #28a745;
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    margin-top: 20px;
    transition: transform 0.2s;
}

.download-button:hover {
    transform: translateY(-2px);
}

.download-button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.discard-button {
    background: #dc3545;
    color: white;
    padding: 15px 40px;
    border: none;
    border-radius: 8px;
    font-size: 1.1em;
    cursor: pointer;
    margin-top: 20px;
    transition: transform 0.2s;
}

.discard-button:hover {
    transform: translateY(-2px);
    background: #c82333;
}