body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f2f2f2;
}

.page {
    max-width: 760px;
    margin: 30px auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
    padding: 24px;
}

h1 {
    margin-top: 0;
    font-size: 28px;
}

p {
    line-height: 1.5;
}

.error {
    background: #fdeaea;
    border: 1px solid #e8b0b0;
    color: #8a1f1f;
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 16px;
}

.btn {
    background: #467CD6;
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 14px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
}

.btn:hover {
    background: #2d64c0;
}

.pdf-viewer {
    margin-top: 16px;
    width: 100%;
    height: 72vh;
    border: 1px solid #d9d9d9;
    border-radius: 8px;
    background: #fafafa;
}

.confirm {
    margin-top: 18px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
}

.submit-row {
    margin-top: 20px;
}

.submit-row button[disabled] {
    opacity: 0.55;
    cursor: not-allowed;
}