/* form area */
.custom_container {width: 680px; max-width: 100%; margin: 0 auto;}

/* flash messages */
#flash_messages {
    max-width: 680px; margin: 0 auto 10px auto; padding: 0 10px; box-sizing: border-box;}
.flash_messages {
    width: 100%; border-radius: 5px; text-align: center; box-sizing: border-box;}
.flash_messages.error {
    background-color: #ffcccc; color: #a94442;
    border: 1px solid #a94442; padding: 10px;}
.flash_messages.success {
    background-color: #cce5ff; color: #004085;
    border: 1px solid #004085; padding: 10px;}
.flash_messages.wait {
    background-color: #fff3cd; color: #856404; 
    border: 1px solid #b8b8b8; padding: 10px;}

/* form & label style */
form {
    display: flex; flex-direction: column; align-items: center; padding: 10px;
    background: #ecf0f1;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.1); border-radius: 10px;}
.label_1 {
    margin: 0 0 5px 0; padding: 0; text-align: center;
    font-size: 16px; color: #0006a8;
    text-shadow: 1px 2px 2px #9696a8;}
.label_2 {
    margin: 0; padding: 0; text-align: left;
    font-size: 12px; color: #0006a8;}
.label_container {
  display: flex; align-items: center; vertical-align: text-bottom;}
.label {margin-right: 10px;}

/* selection area */
.column_container {
    width: 100%;
    display: flex; justify-content: center; margin: 10px 0; gap: 10px;
    /*flex-wrap: wrap;*/
}
.column {
    flex: 1 1 0; display: flex; flex-direction: column; align-items: flex-start;
    padding: 5px 10px;
    background-color: #ecf0f1; border-radius: 8px; border: 3px inset #f3f3f3}
.column_label {
    width: 100%; margin-bottom: 5px; text-align: center;
    font-size: 14px; color: #0006a8;
    text-shadow: 1px 2px 2px #9696a8;}

.column_container .drop_area {
    flex: 1 1 160px; /* maintain minimum-width with equal-width */
    max-width: 25%;  /* limited to one-forth */
    box-sizing: border-box;
    /*word-break: break-word;*/
}

/* file upload area */
.drop_area {
    width: 75%; margin: 10px 0; padding: 20px;
    text-align: center; color: #3498db;
    border: 2px dashed #3498db; border-radius: 10px;
    cursor: pointer; transition: background-color 0.3s, color 0.3s;}
.drop_area:hover {
    background-color: #ecf5fc;
    color: #2980b9;}
.drop_area.dragover {
    background-color: #d0e8f9;
    color: #2980b9;}
.file_name {
    margin-top: 10px; font-size: 12px; color: #555;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; width: 100%;
}

/* radio button area */
    .radio_group label {display: block; margin: 2px 0; font-size: 14px;}

/* axis selection area */
.select_group {
    width: 100%;
    padding: 6px 10px;
    margin-top: 4px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: #fff;
    appearance: auto;
}

/* axis number selection area */
.limit {
    width: 100%;
    padding: 6px 6px;
    margin-top: 4px;
    font-size: 14px;
    border: 1px solid #ccc;
    border-radius: 6px;
    background-color: #fff;
    appearance: auto;
}

/* dictionaries area */
.dictionaries::file-selector-button {
    display: block; margin: 0 auto; padding: 8px 16px; text-align: center;
    font-size: 12px; color: white;
    background: #8a8eae; border: 0; border-radius: 10em;}

/* input file area */
input[type="file"] {
    width: 80%; margin: 5px auto 0 auto; padding: 5px;
    background: white; border: 1px solid #ccc; border-radius: 5px;}

/* submit area */
button.custom_button {
    width: 90%; margin: 10px 0; padding: 8px 15px;
    color: white;
    background-color: #3498db; border: none; border-radius: 5px; box-shadow: 0px 4px 8px #0000001a;
    cursor: pointer; transition: background 0.3s;}
button.custom_button:hover {background-color: #2980b9;}
button.custom_button:disabled {
    background-color: #dfdfdf;
    color: #666666;
    cursor: not-allowed;}
button.sample_custom_button {
    width: 90%; margin: 5px 0; padding: 8px 15px;
    color: white;
    background-color: #4ab6d7; border: none; border-radius: 5px; box-shadow: 0px 4px 8px #0000001a;
    cursor: pointer; transition: background 0.3s;}
button.sample_custom_button:hover {background-color: #2980b9;}

/* tab button */
.tab-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: 0px;
    gap: 10px;
}
.tab-button {
    padding: 8px 20px;
    border: none;
    background-color: #ecf0f16a;
    color: #0000002a;
    cursor: pointer;
    border-radius: 0px;
    font-weight: bold;
    transition: background 0.3s;
    /*box-shadow: 0px 4px 8px #0000001a;*/
}
.tab-button.active {
    background-color: #ecf0f1;
    /*background-color: #3498db;*/
    color: #000000;
}

/* tab contents */
.tab-content {
    display: none;
    padding: 5px;
    background: #ecf0f1;
    box-shadow: 0px 4px 8px #0000001a;
}
.tab-content.active {
    display: block;
}

/* results area */
.results {
    max-width: 768px; margin: 20px auto; padding: 10px; }
.results_title {
    margin: 10px auto 5px auto; padding: 5px; text-align: center;
    font-size: 18px; color: #a94442; font-weight: bold;
    text-shadow: 2px 2px 2px #9696a8;}
.results_sub_title {
    margin-left: 10%; margin-bottom: 5px; color: #a94442;
    font-size: 16px; font-weight: bold;/*text-decoration:underline;*/}
.results_label {
    margin-left: 10%; margin-bottom: 5px; color: #000000;
    font-size: 12px; text-align: left;}
.results_dash {
    margin: 10px auto; padding: 10px; text-align: center;
    font-size: 14px; font-weight: bold;}
.patentmaps {width: 100%; margin: 0 auto; display: flex; flex-direction: column; align-items: center;}
.patentmaps_img {margin: 10px}
.downloads {width: 400px; margin: 0 auto;}
.download_button {text-align: center; margin: 0 auto 10px}
.download_link {
    display: inline-block; margin: 0px 0; padding: 8px 15px;
    color: white; text-decoration: none;
    background-color: #27ae60; border-radius: 5px;
    transition: background 0.3s;}
.download_link:hover {background-color: #219150;}
.wordclouds {width: 600px; margin: 0 auto;}
.wordclouds img {max-width:600px; margin: 0 auto 10px; display: block;}
.wordcloud_msg {text-align: center; font-size: 16px; color: gray;}

/* responsibe */
@media (max-width: 768px) {
    .container {
        width: 95%;
    }
    .column_container {
        flex-wrap: wrap;
        gap: 10px;
    }
    .column_container .drop_area {
        max-width: 100%;
        flex: 1 1 100%;
    }
}