/*back color*/
body {
    background: linear-gradient(to top, #441716, #b3564f);
}

/* label big blue */
.label_big_blue {
    font-size: 100px;
    font-weight: bold;
    color: #007bff;
    text-align: center;
    letter-spacing: 3px;
    text-shadow: 3px 3px 8px rgba(0,0,0,0.3);
    margin: 30px 0;
}
/*  back button */
.back_button {
    position: fixed;     /* أهم سطر */
    top: 20px;
    left: 20px;

    background-color: #28a745; /* أخضر */
    color: blue;

    font-size: 50px;
    padding: 10px 20px;

    border: 4px solid red;
    border-radius: 10px;

    cursor: pointer;
    z-index: 9999; /* فوق كل شيء */
}
.back_button:hover {
    background-color: #42e92c;/* mouse move */
    color: rgb(238, 236, 222);
}
/* choose button */
.Choose_Button {
    display: block;
    width :60%;
    
    background-color:green;
    color: white;

    font-size: 72px;   /* 170 كبير جداً، جرب 72 أو 90 */
    font-weight: bold;

    border: 5px solid red;
    border-radius: 40px;

    padding: 20px 40px;
    margin: 10px auto;

    cursor: pointer;

    box-shadow: 0 0 10px rgba(0,0,0,0.3);
}
.Choose_Button:hover{
    background-color:bisque;
    color: blue;
}
/* PDF page */
.top_bar {
    display: flex;
    justify-content: center;   /* في الوسط */
    align-items: center;
    gap: 20px;

    width: 90%;
    margin: 20px auto;
}


.pdf_search {
    flex: 1;           /* 👈 يأخذ المساحة */
    padding: 15px;

    font-size: 35px;
    border: 4px solid #007bff;
    border-radius: 20px;
}


.pdf_count {
    white-space: nowrap;   /* 👈 يمنع النزول لسطر جديد */
    font-size: 35px;
    font-weight: bold;
    color: blue;
}

.pdf_item {
    display: block;
    width: 90%;
    margin: 15px auto;
    padding: 20px;

    background-color: white;
    border: 4px solid #ccc;
    border-radius: 20px;

    font-size: 32px;
    text-align: center;

    box-shadow: 0 0 8px rgba(0,0,0,0.25);
}

.pdf_item:hover {
    background-color: #e8f1ff;
    border-color: #007bff;
}

.pdf_item a {
    text-decoration: none;
    color: black;
    font-weight: bold;
}

.open_mode_form {
    text-align: middle;
    margin: 20px;
}

.open_mode_button {
    position: fixed;     /* أهم سطر */
    top: 20px;
    right: 20px;

    font-size: 35px;
    font-weight: bold;

    padding: 15px 30px;

    background-color: #28a745;
    color: blue;

    border: 4px solid red;
    border-radius: 25px;

    cursor: pointer;
}

.open_mode_button:hover {
    background-color: #42e92c;
    color: white;
}
/*  */
.video_combo {
    width: 40%;
    padding: 15px;

    font-size: 35px;
    font-weight: bold;

    border: 4px solid #007bff;
    border-radius: 20px;

    background-color: white;
    color: blue;
}

#viewerBox:fullscreen {
    width: 100%;
    height: 100%;
    margin: 0;
    border: none;
    border-radius: 0;
}

#viewerBox:fullscreen #mainImage {
    max-width: 100%;
    max-height: 85vh;
}

.image_thumb {
    width: 120px;
    height: 80px;
    object-fit: cover;
    border-radius: 12px;
    display: block;
    margin: 5px auto;
    image-rendering: auto;
}

.image_item {
    width: 180px;
    display: inline-block;
    vertical-align: top;
    margin: 10px;
    font-size: 18px;
}
#imageList {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}