/* ==========================================================
   EXAM MANAGEMENT
   GLOBAL LAYOUT
========================================================== */

*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{

    font-family:
        "Noto Sans Bengali",
        sans-serif;

    background:#eef2f7;

    color:#1e293b;

    line-height:1.6;
}

/* ===========================
LINK
=========================== */

a{

    text-decoration:none;

    color:inherit;

    transition:.25s;

}

img{

    display:block;

    max-width:100%;

}

/* ===========================
LAYOUT
=========================== */

.app-layout{

    display:flex;

    min-height:100vh;

    background:#eef2f7;

}

/* ===========================
SIDEBAR
=========================== */

.sidebar{

    width:270px;

    background:#172554;

    color:#fff;

    display:flex;

    flex-direction:column;

    position:fixed;

    left:0;

    top:0;

    bottom:0;

    overflow-y:auto;

    flex-shrink:0;

    z-index:999;

    transition:width .2s ease;

}

.sidebar-collapse-toggle{

    display:none;

}

.sidebar-logo{

    padding:28px 22px;

    border-bottom:

        1px solid rgba(255,255,255,.12);

}

.sidebar-logo__image{

    display:block;

    width:100%;

    max-width:226px;

    height:72px;

    object-fit:contain;

    object-position:left center;

    border-radius:12px;

}

.sidebar-logo small{

    display:block;

    opacity:.75;

    margin-top:4px;

}

/* ===========================
MENU
=========================== */

.sidebar-nav{

    padding:18px;

}

.sidebar-nav a,
.sidebar-toggle{

    width:100%;

    display:flex;

    align-items:center;

    justify-content:space-between;

    gap:12px;

    padding:12px 15px;

    margin-bottom:6px;

    border:none;

    border-radius:10px;

    background:none;

    color:#fff;

    cursor:pointer;

    font-size:15px;

    text-align:left;

}

.sidebar-nav a::before,
.sidebar-toggle::before{

    content:attr(data-icon);

    flex:0 0 22px;

    width:22px;

    text-align:center;

    font-size:18px;

    line-height:1;

}



/* Active Sidebar Link */
.sidebar-nav a:hover,
.sidebar-toggle:hover{
    background:rgba(255,255,255,.08);
}

.sidebar-nav a.active,
.sidebar-nav a.active:hover{
    background:#2563eb !important;
    color:#fff !important;
    font-weight:600;
    border-radius:8px;
}

.sidebar-nav a.active:hover{
    background:#1d4ed8 !important;
    color:#fff !important;
}


.sidebar-submenu.open{
    display:block;
}
/* ==========================================================
   SIDEBAR SUB MENU
========================================================== */

.sidebar-group{

    margin-bottom:8px;

}

.sidebar-submenu{

    display:none;

    margin-left:14px;

    margin-top:8px;

    margin-bottom:10px;

    border-left:2px solid rgba(255,255,255,.10);

    padding-left:12px;

}

.sidebar-submenu.open{

    display:block;

}

.sidebar-submenu a{

    display:block;

    color:#dbeafe;

    padding:10px 12px;

    margin-bottom:4px;

    border-radius:8px;

    font-size:14px;

}

.sidebar-submenu a:hover{

    background:rgba(255,255,255,.08);

}

/* ==========================================================
   MAIN WRAPPER
========================================================== */

.main-wrapper{

    flex:1;

    margin-left:270px;

    min-height:100vh;

    display:flex;

    flex-direction:column;

    transition:margin-left .2s ease;

}

/* ==========================================================
   TOPBAR
========================================================== */

.topbar{

    height:70px;

    background:#ffffff;

    display:flex;

    align-items:center;

    justify-content:space-between;

    padding:0 24px;

    border-bottom:1px solid #e2e8f0;

    position:sticky;

    top:0;

    z-index:100;

}

.topbar-left{

    display:flex;

    align-items:center;

    gap:14px;

.language-switcher {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #64748b;
    font-size: 13px;
    white-space: nowrap;
}

.language-switcher__link {
    padding: 4px 6px;
    border-radius: 5px;
}

.language-switcher__link:hover,
.language-switcher__link.active {
    color: #1d4ed8;
    background: #eff6ff;
}
}

    .topbar-right {
        gap: 6px;
    }

    .language-switcher {
        font-size: 12px;
    }

    .btn-login span {
        display: none;
    }
.topbar-title{

    font-size:22px;

    font-weight:700;

    color:#0f172a;

}

.topbar-right{

    display:flex;

    align-items:center;

    gap:12px;

}

.topbar-user{
    display:inline-flex;
    align-items:center;
    gap:9px;
    min-width:0;
    color:#334155;
    font-size:14px;
    font-weight:600;
}

.topbar-user__avatar{
    display:inline-grid;
    place-items:center;
    flex:0 0 36px;
    width:36px;
    height:36px;
    overflow:hidden;
    color:#fff;
    background:linear-gradient(145deg,#2563eb,#164e9f);
    border:2px solid #fff;
    border-radius:50%;
    box-shadow:0 0 0 1px #dbe3ee;
    font-size:12px;
    font-weight:800;
    line-height:1;
}

.topbar-user__avatar img{
    width:100%;
    height:100%;
    object-fit:cover;
}

.topbar-user__meta{
    display:flex;
    min-width:0;
    flex-direction:column;
    justify-content:center;
    line-height:1.15;
}

.topbar-user__name{
    max-width:180px;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
}

.topbar-user__role{
    max-width:180px;
    margin-top:3px;
    overflow:hidden;
    color:#64748b;
    font-size:11px;
    font-weight:600;
    letter-spacing:0;
    text-overflow:ellipsis;
    text-transform:uppercase;
    white-space:nowrap;
}

.btn-login {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.menu-button{

    display:none;

    border:none;

    background:none;

    cursor:pointer;

    font-size:26px;

    color:#172554;

}

/* ==========================================================
   PAGE CONTAINER
========================================================== */

.page-container{

    flex:1;

    padding:28px;

}

/* ==========================================================
   CARD
========================================================== */

.card{

    background:#fff;

    border-radius:14px;

    padding:22px;

    margin-bottom:20px;

    box-shadow:

        0 2px 10px rgba(15,23,42,.06);

}
/* ==========================================================
   BUTTON SYSTEM
========================================================== */

.btn{

    display:inline-flex;

    align-items:center;

    justify-content:center;

    gap:8px;

    padding:10px 18px;

    border:none;

    border-radius:10px;

    cursor:pointer;

    font-size:14px;

    font-weight:600;

    transition:.25s;

}


.btn-primary{

    background:#2563eb;

    color:#fff;

}


.btn-primary:hover{

    background:#1d4ed8;

}


.btn-success{

    background:#16a34a;

    color:#fff;

}


.btn-danger{

    background:#dc2626;

    color:#fff;

}


.btn-warning{

    background:#d97706;

    color:#fff;

}


.btn-secondary{

    background:#475569;

    color:#fff;

}


.btn-outline{

    background:transparent;

    border:1px solid #cbd5e1;

    color:#334155;

}


.btn-sm{

    padding:7px 12px;

    font-size:13px;

}


.btn-lg{

    padding:14px 24px;

    font-size:16px;

}
/* ==========================================================
   FORM SYSTEM
========================================================== */

.form-group{

    margin-bottom:18px;

}


.form-label{

    display:block;

    margin-bottom:7px;

    font-size:14px;

    font-weight:600;

    color:#334155;

}


.form-control{

    width:100%;

    padding:11px 14px;

    border:1px solid #cbd5e1;

    border-radius:10px;

    background:#fff;

    color:#1e293b;

    font-size:14px;

    outline:none;

    transition:.25s;

}


.form-control:focus{

    border-color:#2563eb;

    box-shadow:

        0 0 0 3px rgba(37,99,235,.15);

}


.form-control::placeholder{

    color:#94a3b8;

}


.form-select{

    width:100%;

    padding:11px 14px;

    border:1px solid #cbd5e1;

    border-radius:10px;

    background:#fff;

    cursor:pointer;

    font-size:14px;

}


textarea.form-control{

    min-height:120px;

    resize:vertical;

}


.form-row{

    display:grid;

    grid-template-columns:repeat(2,1fr);

    gap:18px;

}


.form-actions{

    display:flex;

    align-items:center;

    gap:12px;

    margin-top:20px;

}


.input-error{

    margin-top:5px;

    color:#dc2626;

    font-size:13px;

}


/* Disabled */

.form-control:disabled,

.form-select:disabled{

    background:#f1f5f9;

    cursor:not-allowed;

}
/* ==========================================================
   TABLE SYSTEM
========================================================== */

.table-wrapper{

    width:100%;

    overflow-x:auto;

    background:#fff;

    border-radius:12px;

}


.table{

    width:100%;

    border-collapse:collapse;

    font-size:14px;

}


.table thead{

    background:#f8fafc;

}


.table th{

    text-align:left;

    padding:13px 15px;

    font-weight:700;

    color:#334155;

    border-bottom:1px solid #e2e8f0;

    white-space:nowrap;

}


.table td{

    padding:13px 15px;

    border-bottom:1px solid #e2e8f0;

    color:#475569;

    vertical-align:middle;

}


.table tbody tr:hover{

    background:#f8fafc;

}


.table tbody tr:last-child td{

    border-bottom:none;

}


/* Compact Table */

.table-sm th,

.table-sm td{

    padding:9px 12px;

}


/* Center Alignment */

.text-center{

    text-align:center;

}


.text-right{

    text-align:right;

}


/* Empty Data */

.empty-state{

    text-align:center;

    padding:40px 20px;

    color:#64748b;

}


.empty-state h3{

    margin-bottom:8px;

    color:#334155;

}
/* ==========================================================
   BADGE & STATUS SYSTEM
========================================================== */

.badge{

    display:inline-flex;

    align-items:center;

    padding:5px 10px;

    border-radius:999px;

    font-size:12px;

    font-weight:600;

    line-height:1;

}


.badge-primary{

    background:#dbeafe;

    color:#1d4ed8;

}


.badge-success{

    background:#dcfce7;

    color:#15803d;

}


.badge-danger{

    background:#fee2e2;

    color:#b91c1c;

}


.badge-warning{

    background:#fef3c7;

    color:#b45309;

}


.badge-secondary{

    background:#e2e8f0;

    color:#475569;

}


/* ==========================================================
   ALERT SYSTEM
========================================================== */

.alert{

    padding:14px 16px;

    border-radius:10px;

    margin-bottom:18px;

    font-size:14px;

    display:flex;

    align-items:center;

    gap:10px;

}


.alert-success{

    background:#dcfce7;

    color:#166534;

    border:1px solid #bbf7d0;

}


.alert-danger{

    background:#fee2e2;

    color:#991b1b;

    border:1px solid #fecaca;

}


.alert-warning{

    background:#fef3c7;

    color:#92400e;

    border:1px solid #fde68a;

}


.alert-info{

    background:#dbeafe;

    color:#1e40af;

    border:1px solid #bfdbfe;

}
/* ==========================================================
   RESPONSIVE DESIGN
========================================================== */

@media(min-width:993px){

    .sidebar-collapse-toggle{
        display:block;
        position:absolute;
        top:18px;
        right:14px;
        width:30px;
        height:30px;
        border:1px solid rgba(255,255,255,.2);
        border-radius:8px;
        background:rgba(255,255,255,.08);
        color:#fff;
        cursor:pointer;
        font-size:18px;
        line-height:1;
    }

    .sidebar-collapse-toggle:hover{
        background:rgba(255,255,255,.18);
    }

    .sidebar.collapsed{
        width:78px;
    }

    .sidebar.collapsed + .main-wrapper{
        margin-left:78px;
    }

    .sidebar.collapsed .sidebar-logo{
        padding:64px 0 24px;
        text-align:center;
    }

    .sidebar.collapsed .sidebar-logo__image{
        width:58px;
        height:42px;
        margin:0 auto;
    }

    .sidebar.collapsed .sidebar-logo small,
    .sidebar.collapsed .sidebar-nav a,
    .sidebar.collapsed .sidebar-toggle{
        font-size:0;
    }

    .sidebar.collapsed .sidebar-nav{
        padding:18px 10px;
    }

    .sidebar.collapsed .sidebar-nav a,
    .sidebar.collapsed .sidebar-toggle{
        justify-content:center;
        padding:12px 8px;
    }

    .sidebar.collapsed .sidebar-nav a::before,
    .sidebar.collapsed .sidebar-toggle::before{
        flex-basis:28px;
        width:28px;
        font-size:20px;
    }

    .sidebar.collapsed .sidebar-submenu,
    .sidebar.collapsed .sidebar-submenu.open{
        display:block !important;
        margin:2px 0 10px 8px;
        padding:4px 0 4px 6px;
        border-left:2px solid rgba(255,255,255,.24);
    }

    .sidebar.collapsed .sidebar-submenu a{
        justify-content:center;
        padding:10px 2px;
        margin-bottom:3px;
        font-size:0;
    }

    .sidebar.collapsed .sidebar-submenu a::before{
        flex-basis:24px;
        width:24px;
        font-size:17px;
    }

    .sidebar.collapsed .sidebar-collapse-toggle{
        right:24px;
        transform:rotate(180deg);
    }

}


@media(max-width:992px){


    .sidebar{

        transform:translateX(-100%);

        transition:.3s;

    }


    .sidebar.active{

        transform:translateX(0);

    }


    .main-wrapper{

        margin-left:0;

    }


    .menu-button{

        display:block;

    }


    .page-container{

        padding:20px;

    }


}



@media(max-width:768px){


    .topbar{

        padding:0 15px;

    }


    .topbar-title{

        font-size:18px;

    }


    .form-row{

        grid-template-columns:1fr;

    }


    .card{

        padding:16px;

        border-radius:10px;

    }


    .btn{

        width:100%;

    }


    .form-actions{

        flex-direction:column;

        align-items:stretch;

    }


}



@media(max-width:480px){


    .page-container{

        padding:14px;

    }


    .sidebar{

        width:240px;

    }


    .topbar-right{

        gap:5px;

    }

    .topbar-user__meta{
        display:none;
    }

    .topbar-user__avatar{
        flex-basis:32px;
        width:32px;
        height:32px;
    }


}