/*==================================================
                ROOT VARIABLES
==================================================*/

:root {
    --mgmt-primary: #2f8fef;
    --mgmt-primary-dark: #1c74d4;
    --mgmt-bg-start: #0a1120;
    --mgmt-bg-end: #17263f;
}

/*==================================================
                HEADER
==================================================*/

.course-mgmt-header {
    position: relative;
    padding: 70px 0 60px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--mgmt-bg-start), var(--mgmt-bg-end));
}

    .course-mgmt-header::before {
        content: "";
        position: absolute;
        width: 400px;
        height: 400px;
        top: -150px;
        left: -100px;
        background: radial-gradient(circle, rgba(47,143,239,.18), transparent 70%);
    }

    .course-mgmt-header .container {
        position: relative;
        z-index: 2;
    }

    /*==================================================
                BADGE
==================================================*/

    .course-mgmt-header .mgmt-badge {
        display: inline-block;
        padding: 8px 18px;
        border-radius: 50px;
        background: rgba(255,255,255,.06);
        border: 1px solid rgba(255,255,255,.12);
        color: var(--mgmt-primary);
        font-size: 13px;
        font-weight: 700;
        margin-bottom: 20px;
    }

    /*==================================================
                MAIN ROW
==================================================*/

    .course-mgmt-header .mgmt-header-main {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 20px;
        flex-wrap: wrap;
    }

    .course-mgmt-header .mgmt-header-text {
        max-width: 600px;
    }

        .course-mgmt-header .mgmt-header-text h1 {
            color: #fff;
            font-size: 34px;
            font-weight: 800;
            margin: 0 0 12px;
        }

        .course-mgmt-header .mgmt-header-text p {
            color: #94a3b8;
            font-size: 15px;
            line-height: 1.9;
            margin: 0;
        }

    /*==================================================
                TOOLBAR (search + sort)
==================================================*/

    .course-mgmt-header .mgmt-toolbar {
        margin-top: 40px;
        max-width: 900px;
        display: flex;
        background: #fff;
        border-radius: 18px;
        box-shadow: 0 20px 45px rgba(0,0,0,.35);
        overflow: hidden;
    }

    .course-mgmt-header .mgmt-search-form {
        flex: 1;
        margin: 0;
    }

    .course-mgmt-header .mgmt-search {
        display: flex;
        align-items: center;
        gap: 12px;
        height: 64px;
        padding: 0 22px;
    }

        .course-mgmt-header .mgmt-search i {
            color: #94a3b8;
            font-size: 16px;
        }

        .course-mgmt-header .mgmt-search input {
            flex: 1;
            height: 100%;
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            color: #0f172a;
        }

            .course-mgmt-header .mgmt-search input::placeholder {
                color: #94a3b8;
            }

    .course-mgmt-header .mgmt-sort-form {
        margin: 0;
        border-right: 1px solid #e5e7eb;
    }

        .course-mgmt-header .mgmt-sort-form select {
            height: 64px;
            min-width: 150px;
            padding: 0 22px;
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            font-weight: 700;
            color: #0f172a;
            cursor: pointer;
        }

/*==================================================
                RESPONSIVE
==================================================*/

@media(max-width:768px) {

    .course-mgmt-header {
        padding: 50px 0 40px;
    }

        .course-mgmt-header .mgmt-header-text h1 {
            font-size: 26px;
        }

        .course-mgmt-header .mgmt-toolbar {
            margin-top: 25px;
            max-width: 100%;
            flex-direction: column;
        }

        .course-mgmt-header .mgmt-sort-form {
            border-right: none;
            border-top: 1px solid #e5e7eb;
        }

            .course-mgmt-header .mgmt-sort-form select {
                width: 100%;
            }
}


/*==============================
    MANAGEMENT HEADER
==============================*/

.management-header {
    padding: 170px 0 70px;
    background: linear-gradient(180deg,#08131f 0%,#0d1b2a 100%);
    position: relative;
    overflow: hidden;
}

    .management-header::before {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(circle at top right,rgba(0,168,255,.18),transparent 35%), radial-gradient(circle at bottom left,rgba(0,220,180,.10),transparent 35%);
    }

    .management-header .container {
        position: relative;
        z-index: 2;
    }

.management-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.management-badge {
    display: inline-block;
    padding: 8px 18px;
    border-radius: 30px;
    background: rgba(255,255,255,.08);
    color: #4dd4ff;
    font-size: .9rem;
    margin-bottom: 18px;
}

.management-header h1 {
    color: #fff;
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 12px;
}

.management-header p {
    color: #cfd8e3;
    font-size: 1.05rem;
    margin: 0;
    max-width: 550px;
    line-height: 2;
}

/*==============================
        ACTION BUTTONS
==============================*/

.management-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

    .management-actions a {
        text-decoration: none;
        padding: 15px 28px;
        border-radius: 14px;
        font-weight: 700;
        transition: .35s;
    }

.btn-primary {
    background: #00a8ff;
    color: #fff;
}

    .btn-primary:hover {
        background: #0095e5;
        transform: translateY(-3px);
    }

.btn-secondary {
    background: #1e293b;
    color: #fff;
}

    .btn-secondary:hover {
        background: #334155;
        transform: translateY(-3px);
    }

/*==============================
        TOOLBAR
==============================*/

.management-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    background: #fff;
    border-radius: 18px;
    padding: 20px;
    box-shadow: 0 20px 45px rgba(0,0,0,.08);
    flex-wrap: wrap;
}

.search-form {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 12px;
    background: #f5f7fb;
    padding: 0 18px;
    border-radius: 12px;
    min-width: 280px;
}

    .search-form i {
        color: #777;
    }

    .search-form input {
        flex: 1;
        border: none;
        background: none;
        height: 55px;
        outline: none;
        font-size: .95rem;

    }

.management-toolbar select {
    height: 55px;
    min-width: 220px;
    padding: 0 15px;
    background: #fff;
    outline: none;
    cursor: pointer;
}

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

.management-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 35px;
    margin: 60px 0;
    align-items: start;
}

.management-sidebar {
    margin-right: 30px;
    top: 120px;
}

.management-content {
    width: 100%;
}

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

.management-sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: #fff;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 15px 40px rgba(0,0,0,.06);
    border: 1px solid #edf2f7;
}

    .sidebar-card h5 {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 22px;
        font-size: 1.05rem;
        color: #0f172a;
    }

        .sidebar-card h5 i {
            color: #00a8ff;
        }

    .sidebar-card form {
        display: flex;
        flex-direction: column;
        gap: 15px;
    }

    .sidebar-card input,
    .sidebar-card select {
        width: 100%;
        height: 50px;
        border: 1px solid #e5e7eb;
        border-radius: 12px;
        padding: 0 16px;
        outline: none;
        transition: .3s;
        background: #fff;
    }

        .sidebar-card input:focus,
        .sidebar-card select:focus {
            border-color: #00a8ff;
            box-shadow: 0 0 0 4px rgba(0,168,255,.12);
        }

.sidebar-btn {
    border: none;
    height: 48px;
    border-radius: 12px;
    background: #00a8ff;
    color: #fff;
    font-weight: 700;
    transition: .3s;
}

    .sidebar-btn:hover {
        background: #0096e8;
    }

    .sidebar-btn.danger {
        background: #ef4444;
    }

        .sidebar-btn.danger:hover {
            background: #dc2626;
        }

.sidebar-card hr {
    margin: 25px 0;
    border: none;
    border-top: 1px solid #ececec;
}

/*================================
        TEACHERS
================================*/

.teacher-list {
    list-style: none;
    margin: 0;
    padding: 0;
    max-height: 240px;
    overflow: auto;
}

    .teacher-list li {
        margin-bottom: 10px;
    }

    .teacher-list label {
        display: flex;
        align-items: center;
        gap: 10px;
        cursor: pointer;
        font-size: .95rem;
        color: #334155;
    }

    .teacher-list input[type=checkbox] {
        width: 17px;
        height: 17px;
        accent-color: #00a8ff;
    }

/*================================
        RESET BUTTON
================================*/

.reset-filter-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    padding: 15px;
    background: #1e293b;
    color: #fff;
    border-radius: 16px;
    transition: .3s;
    font-weight: 700;
}

    .reset-filter-btn:hover {
        background: #334155;
        color: #fff;
        transform: translateY(-2px);
    }

/*================================
        COURSES GRID
================================*/

.courses-grid {
    margin: 30px;
    display: flex;
    justify-content: space-evenly;
    gap: 28px;
    flex-wrap: wrap;
}

.course-card {
    width: 292px;
    background: #fff;
    border-radius: 22px;
    overflow: hidden;
    box-shadow: 0 18px 45px rgba(0,0,0,.07);
    transition: .35s;
    cursor: pointer;
}

    .course-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 25px 55px rgba(0,0,0,.12);
    }

.course-image {
    position: relative;
    height: 190px;
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: .45s;
}

.course-card:hover .course-image img {
    transform: scale(1.08);
}

.course-actions {
    position: absolute;
    top: 15px;
    left: 15px;
    display: flex;
    gap: 10px;
}

.action-btn {
    width: 42px;
    height: 42px;
    border: none;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    color: #fff;
    transition: .3s;
}

    .action-btn.edit {
        background: #3b82f6;
    }

    .action-btn.delete {
        background: #ef4444;
    }

    .action-btn:hover {
        color: #fff;
        transform: scale(1.08);
    }

/*================================
        COURSE BODY
================================*/

.course-body {
    padding: 13px;
}

.course-title {
    font-size: 18px;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.8;
    margin-bottom: 35px;
    min-height: 65px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    color: #64748b;
    font-size: 13px;
    margin-bottom: 4px;
}

    .course-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .course-meta i {
        color: #00a8ff;
    }

/*================================
        COURSE FOOTER
================================*/

.course-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    border-top: 1px solid #edf2f7;
    padding-top: 18px;
}

.course-price {
    font-size: 1rem;
    font-weight: 800;
    color: #0f172a;
}

.free-price {
    color: #22c55e;
}

.details-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    background: #0f172a;
    color: #fff;
    padding: 11px 18px;
    border-radius: 12px;
    transition: .3s;
    font-size: .9rem;
    font-weight: 700;
}

    .details-btn:hover {
        background: #00a8ff;
        color: #fff;
    }

/*================================
        RESPONSIVE
================================*/

@media(max-width:1200px) {

    .management-layout {
        grid-template-columns: 280px 1fr;
    }
}

@media(max-width:992px) {

    .management-layout {
        grid-template-columns: 1fr;
    }

    .management-sidebar {
        position: static;
        order: 2;
    }

    .management-content {
        order: 1;
    }

    .management-header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .management-toolbar {
        flex-direction: column;
        align-items: stretch;
    }

        .management-toolbar form {
            width: 100%;
        }

        .management-toolbar select {
            width: 100%;
        }
}

@media(max-width:768px) {

    .management-header {
        padding: 140px 0 50px;
    }

        .management-header h1 {
            font-size: 2.2rem;
        }

    .management-actions {
        width: 100%;
    }

        .management-actions a {
            flex: 1;
            justify-content: center;
            text-align: center;
        }

    .courses-grid {
        grid-template-columns: 1fr;
    }
}

@media(max-width:576px) {

    .management-layout {
        display: flex;
        flex-direction: column;
    }

    .management-sidebar {
        order: 1;
        width: 88%;
    }

    .management-content {
        order: 2;
        width: 100%;
    }

    .management-header h1 {
        font-size: 1.8rem;
    }

    .management-badge {
        font-size: .8rem;
    }

    .sidebar-card {
        padding: 18px;
    }

    .course-body {
        padding: 18px;
    }

    .course-footer {
        flex-direction: column;
        align-items: flex-start;
    }

    .details-btn {
        width: 100%;
    }
}