body,
html {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background-color: #f0f2f5;
}

.pdf-viewer-page {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    box-sizing: border-box;
}

.pdf-main-content {
    display: flex;
    width: 100%;
    max-width: 1200px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
    overflow: hidden;
    height: 80vh;
}

/* Estilos para la barra lateral de miniaturas */
.pdf-sidebar {
    width: 150px;
    background-color: #e9ecef;
    border-right: 1px solid #dee2e6;
    padding: 10px;
    transition: transform 0.3s ease-in-out;
    flex-shrink: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.pdf-sidebar.hidden {
    transform: translateX(-100%);
    width: 0;
    min-width: 0;
    padding: 0;
    border-right: none;
}

#thumbnails-container {
    flex-grow: 1;
    overflow-y: auto;
}

.thumbnail-item {
    margin-bottom: 10px;
    padding: 5px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease;
    text-align: center;
}

.thumbnail-item:hover,
.thumbnail-item.active {
    background-color: #d1d5db;
}

.thumbnail-item span {
    display: block;
    text-align: center;
    font-size: 12px;
    color: #495057;
    margin-top: 5px;
}

.thumbnail-canvas {
    border: 1px solid #adb5bd;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    width: 100%;
    height: auto;
}

/* Estilos para el área del visor */
.pdf-viewer-area {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* Contenedor del visor principal del PDF */
.pdf-container {
    position: relative;
    width: 100%;
    flex-grow: 1;
    overflow: auto;
    border: 1px solid #e0e0e0;
    background-color: #f9f9f9;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Estilos para el modo de pantalla completa */
.pdf-container.fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1000;
    border-radius: 0;
    box-shadow: none;
    background-color: #333;
}

#pdf-canvas {
    display: block;
    margin: 0 auto;
}

#text-layer {
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

#pdf-loading-message,
#pdf-error-message {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2em;
    color: #555;
    text-align: center;
}

#pdf-error-message {
    color: #d9534f;
    display: none;
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
    border: 1px solid transparent;
    border-radius: 0.25rem;
    cursor: pointer;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004a9e;
}

.btn-success {
    color: #fff;
    background-color: #28a745;
    border-color: #28a745;
}

.btn-success:hover {
    background-color: #1e7e34;
    border-color: #1c7430;
}

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

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

.pdf-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    flex-wrap: wrap;
    gap: 10px;
}

/* Nuevos estilos para los botones dinámicos en pantalla completa */
#fullscreen-nav-controls {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1001;
    /* Asegura que esté sobre el visor */
    display: flex;
    gap: 10px;
    background-color: rgba(0, 0, 0, 0.5);
    /* Fondo oscuro semitransparente */
    padding: 10px 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

h1 {
    margin: 0;
    font-size: 2em;
    color: #333;
}