.pdf-reader-page {
    min-height: calc(100vh - 100px);
    background: #f5f6f8;
    padding: 30px 20px;
}

.pdf-reader-container {
    max-width: 1400px;
    margin: 0 auto;
}

.pdf-reader-header {
    background: #ffffff;
    border-radius: 12px;
    padding: 20px 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.06);
}

.pdf-reader-header h1 {
    margin: 10px 0 5px;
    font-size: 26px;
}

.pdf-reader-header p {
    margin: 0;
    color: #666;
}

.back-link {
    text-decoration: none;
    color: #2563eb;
    font-weight: 500;
}

.pdf-viewer {
    width: 100%;
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.pdf-viewer iframe {
    display: block;
    width: 100%;
    height: calc(100vh - 220px);
    min-height: 700px;
    border: none;
}

.no-pdf {
    background: #ffffff;
    border-radius: 12px;
    padding: 80px 30px;
    text-align: center;
}

.no-pdf-icon {
    font-size: 50px;
    margin-bottom: 20px;
}

.no-pdf h2 {
    margin-bottom: 10px;
}

.no-pdf p {
    color: #666;
    margin-bottom: 25px;
}

.btn-back {
    display: inline-block;
    padding: 10px 20px;
    background: #2563eb;
    color: #ffffff;
    text-decoration: none;
    border-radius: 6px;
}

.btn-back:hover {
    color: #ffffff;
}