:root {
    --primary-color: #333;
    --background-color: #fff;
    --border-color: #ddd;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background-color);
    color: var(--primary-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pdf-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100%;
    overflow: hidden;
}

.pdf-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    background: var(--background-color);
    z-index: 1;
}

button {
    background: none;
    border: 1px solid var(--primary-color);
    padding: 8px 16px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s ease;
}

button:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
}

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

#page-info {
    font-size: 14px;
}

#pdf-viewer {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2px;
    padding: 20px;
    background-color: #f5f5f5;
    overflow: auto;
    height: calc(100vh - 60px);
}

.pdf-page {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    background-color: white;
    max-height: calc(100vh - 100px);
    width: auto;
    object-fit: contain;
}