:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --background-color: #f8f9fa;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--background-color);
    margin: 0;
    padding: 0;
}

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

.nav-button {
    display: block;
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    background-color: white;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    text-align: left;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-button:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

.nav-button i {
    margin-right: 10px;
}

.pdf-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    padding: 20px;
    margin-top: 20px;
}

.search-container {
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    padding: 10px;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    margin-bottom: 10px;
}

.search-results {
    background-color: white;
    padding: 10px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 10px;
}

.search-results button {
    min-width: 100px;
}

.search-results button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#pdf-viewer {
    position: relative;
    width: 100%;
    height: calc(100vh - 200px);
    border: 1px solid #dee2e6;
    border-radius: 4px;
    overflow: auto;
    background-color: #f8f9fa;
}

.text-layer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    line-height: 1.0;
    pointer-events: none;
}

.text-layer > span {
    position: absolute;
    white-space: pre;
    cursor: text;
    transform-origin: 0% 0%;
    pointer-events: auto;
    color: transparent;
    transition: all 0.3s ease;
}

.text-layer > span:hover {
    background-color: rgba(0, 123, 255, 0.05);
}

.text-layer > span.search-match {
    color: transparent;
    background-color: transparent;
    position: relative;
}

.text-layer > span.current-match {
    color: transparent;
    background-color: transparent;
    position: relative;
}

canvas {
    display: block;
    margin: 0 auto;
}