.pull-down-panel {
    position: absolute; 
        top: 0;
        right: 5%; 
        width: 1200px; 
        height: 500px;
        z-index: 10000;
    /* background-color: rgba(253, 252, 248, 0.88); */
        background-image: linear-gradient(to bottom left, rgba(253, 252, 248, 0.88), rgba(253, 252, 248, 0.28));
        backdrop-filter: blur(12px) saturate(120%);
        -webkit-backdrop-filter: blur(12px) saturate(120%);
    border: 1px solid rgba(253, 253, 253, 0.3);
    /* border: 1px solid rgba(160, 170, 180, 0.3); */
        border-top: none;
        /* border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px; */
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    font-family: "Cardo", "Source Serif 4", 'Times New Roman', Times, serif;
    color: #4a555a; 
    
    transform: translateY(-100%);
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    will-change: transform;
}
.pull-down-panel.open { transform: translateY(0); }

.panel-body {
    display: flex;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
}

.content-viewer {
    flex: 1;
    position: relative;
    box-sizing: border-box;
    padding: 10px;
}
#category-iframe {
    width: 100%;
    height: 100%;
    display: none; 
    background: transparent; 
}

.placeholder-text {
    text-align: center;
    margin-top: 150px;
}
.placeholder-text .title-main {
    font-size: 18px;
        font-weight: normal;
        font-family: 'Times New Roman', Times, serif;
    background: linear-gradient(to bottom, rgb(167, 156, 156), rgb(107, 120, 104));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 2px;
    margin: 0 0 10px 0;
}
.placeholder-text .title-sub {
    font-size: 12px;
    color: #5c6b73;
    letter-spacing: 1px;
    margin: 0;
}

.category-sidebar {
    position: relative;
    width: 240px;
    height: 100%;
    border-left: 1px solid rgba(160, 170, 180, 0.3);
    overflow-y: auto; 
}

.star-line-I {
    position: absolute;
    width: 0.5px;
    height: 170px;
    left: 10px;
    top: 40px;
    background-color: rgb(224, 224, 236);
    pointer-events: none;
}
.big-star {
    position: absolute; width: 10px; height: 10px; left: -5px;
    background-color: white; transform: rotate(45deg);
    outline: 1px solid rgb(219, 219, 233);
}
.small-star {
    position: absolute; width: 5px; height: 5px; left: -2.5px;
    background-color: white; transform: rotate(45deg);
    outline: 1px solid rgb(112, 112, 161);
}

.category-list {
    list-style: none;
    padding: 20px 0 20px 30px;
    margin: 0;
}

.category-list li {
    padding: 4px 15px;
    font-size: 13px;
    color: #5c6b73;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
    border-left: 2px solid transparent; 
    border-bottom: 1px solid rgba(196, 203, 228, 0.409);
    /* border-bottom: 1px solid rgb(196, 203, 228); */
}

.category-list li:hover {
    color: rgb(200, 181, 134);
    background-color: rgba(250, 252, 250, 0.5);
}

.category-list li.active {
    color: rgb(193, 182, 155);
    background-color: rgba(226, 226, 226, 0.2);
    border-left: 2px solid rgb(200, 181, 134);
    /* border-left: 2px solid rgb(112, 112, 161); */
}

.category-sidebar::-webkit-scrollbar { width: 4px; }
.category-sidebar::-webkit-scrollbar-thumb {
    background: rgba(160, 170, 180, 0.2); 
    border-radius: 2px;
}
.category-sidebar::-webkit-scrollbar-thumb:hover { 
    background: rgba(160, 170, 180, 0.5); 
}

.pull-down-handle-deco-I{
    position: absolute;
        bottom: -15px; 
        right: 30px; 
        width: 20px;
        height: 20px;
    background-color: rgba(253, 252, 248, 0.102);
    backdrop-filter: blur(12px);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        cursor: pointer;
        border-top: none;
    display: flex;
        justify-content: center;
        align-items: center;
        transition: background 0.2s;
        transform: rotate(45deg);
}
.pull-down-handle-deco-I:hover {
    background-image: linear-gradient(to bottom left, rgba(253, 252, 248, 0.88), rgba(253, 252, 248, 0.18));
}
.pull-down-handle-deco-II{
    position: absolute;
        bottom: 15px; 
        right: 7px; 
        width: 7px;
        height: 7px;
    background-color: rgba(253, 252, 248, 0.102);
    backdrop-filter: blur(12px);
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
        cursor: pointer;
        border-top: none;
    display: flex;
        justify-content: center;
        align-items: center;
        transition: background 0.2s;
        transform: rotate(45deg);
}
.pull-down-handle-deco-II:hover {
    background-image: linear-gradient(to bottom left, rgba(253, 252, 248, 0.88), rgba(253, 252, 248, 0.18));
}
.pull-down-handle {
    position: absolute;
        bottom: -15px; 
        right: 50px;   
        /* width: 40px;   
        height: 15px;   */
        width: 100px;
        height: 100px;
    background-color: rgba(253, 252, 248, 0.102);
    /* background-color: rgba(253, 252, 248, 0.88); */
    backdrop-filter: blur(12px);
    /* border-bottom: 2px solid rgba(240, 232, 201, 0.483); */
        border-top: none;
        /* border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px; */
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    cursor: pointer;
    display: flex;
        justify-content: center;
        align-items: center;
        transition: background 0.2s;
        transform: rotate(45deg);
}
.pull-down-handle:hover {
    transition: background 0.2s;
    background-image: linear-gradient(to bottom left, rgba(253, 252, 248, 0.88), rgba(253, 252, 248, 0.18));
    /* background-color: rgba(240, 240, 235, 0.717); */
}
/* .pull-down-handle:active {
    background-image: linear-gradient(to bottom left, rgba(253, 252, 248, 0.963), rgba(253, 252, 248, 0.18));
} */

.handle-bar {
    width: 25px;
    height: 2px;
    background-color: rgba(160, 170, 180, 0.6);
    border-radius: 1px;
}