*{
    box-sizing:border-box;
}

body{
    margin:0;
    background:#171b20;
    color:#f8f9fa;
    font-family:"Segoe UI",Tahoma,Geneva,Verdana,sans-serif;
}

.manual-shell{
    min-height:100vh;
    display:grid;
    grid-template-columns:260px 1fr;
}

.manual-sidebar{
    background:#11151a;
    border-right:1px solid #2f363d;
    padding:22px 18px;
    position:sticky;
    top:0;
    height:100vh;
}

.manual-brand{
    width:46px;
    height:46px;
    display:grid;
    place-items:center;
    background:#0d6efd;
    border-radius:8px;
    font-weight:800;
    letter-spacing:1px;
    margin-bottom:14px;
}

.manual-title{
    font-size:20px;
    font-weight:700;
    margin-bottom:22px;
}

#manualMenu{
    display:flex;
    flex-direction:column;
    gap:8px;
}

#manualMenu button,
.manual-back{
    width:100%;
    text-align:left;
    background:#1f252c;
    color:#f8f9fa;
    border:1px solid #343a40;
    border-radius:8px;
    padding:10px 12px;
    text-decoration:none;
    cursor:pointer;
}

#manualMenu button.active,
#manualMenu button:hover,
.manual-back:hover{
    background:#0d6efd;
    border-color:#0d6efd;
}

.manual-back{
    display:block;
    margin-top:24px;
}

.manual-main{
    padding:28px;
}

.manual-header{
    display:flex;
    justify-content:space-between;
    gap:20px;
    align-items:flex-start;
    border-bottom:1px solid #ffffff;
    padding-bottom:18px;
    margin-bottom:22px;
}

.manual-header h1{
    margin:0;
    font-size:28px;
    font-weight:800;
}

.manual-header p{
    margin:8px 0 0;
    color:#c9d1d9;
}

.manual-actions{
    display:flex;
    gap:10px;
}

.manual-actions a{
    color:#ffffff;
    border:1px solid #ffffff;
    padding:8px 18px;
    text-decoration:none;
    border-radius:6px;
}

.manual-actions a:hover{
    background:#ffffff;
    color:#171b20;
}

.manual-search{
    margin-bottom:22px;
}

.manual-search input{
    width:100%;
    background:#1f252c;
    color:#ffffff;
    border:1px solid #49515a;
    border-radius:8px;
    padding:14px 16px;
    font-size:15px;
}

.manual-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
    gap:16px;
}

.manual-card{
    background:#24292f;
    border:1px solid #343a40;
    border-radius:8px;
    padding:18px;
}

.manual-card h2{
    font-size:18px;
    margin:0 0 10px;
}

.manual-card p{
    color:#d8dee4;
    line-height:1.5;
}

.manual-card-image{
    display:block;
    width:100%;
    margin:14px 0;
    padding:0;
    overflow:hidden;
    border:1px solid #49637d;
    border-radius:8px;
    background:#0b1724;
    cursor:pointer;
}

.manual-card-image img{
    display:block;
    width:100%;
    max-height:320px;
    object-fit:contain;
    background:#e8edf2;
}

.manual-card ul{
    padding-left:18px;
    margin-bottom:0;
}

.manual-card li{
    margin-bottom:7px;
}

.manual-tags{
    display:flex;
    gap:6px;
    flex-wrap:wrap;
    margin-top:14px;
}

.manual-tag{
    font-size:12px;
    color:#ffffff;
    border:1px solid #6c757d;
    border-radius:999px;
    padding:4px 8px;
}

.manual-image-preview{
    position:fixed;
    inset:0;
    z-index:9999;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:24px;
    background:rgba(0,0,0,.82);
}

.manual-image-dialog{
    width:min(1100px,96vw);
    max-height:92vh;
    display:grid;
    grid-template-rows:auto 1fr;
    overflow:hidden;
    border:1px solid #5b7896;
    border-radius:10px;
    background:#101820;
}

.manual-image-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:12px 14px;
    border-bottom:1px solid #2f465e;
}

.manual-image-header button{
    border:1px solid #6c757d;
    border-radius:6px;
    padding:7px 12px;
    background:#1f252c;
    color:#fff;
    cursor:pointer;
}

.manual-image-dialog img{
    width:100%;
    max-height:calc(92vh - 56px);
    object-fit:contain;
    background:#e8edf2;
}

@media(max-width:800px){
    .manual-shell{
        grid-template-columns:1fr;
    }

    .manual-sidebar{
        position:relative;
        height:auto;
    }

    .manual-header{
        flex-direction:column;
    }
}