*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial,Helvetica,sans-serif;
}

body{
    background:#eef5ff;
}


/* =========================================
   Layout
========================================= */

.container{
    max-width:1200px;
    margin:30px auto;
    padding:20px;
}


/* =========================================
   Header
========================================= */

.header{
    display:flex;
    justify-content:space-between;
    align-items:center;
    background:#fff;
    padding:18px 30px;
    margin-bottom:35px;
    border-radius:18px;
    box-shadow:0 8px 25px rgba(0,0,0,.08);
}

.back{
    text-decoration:none;
    color:#2d7ff9;
    font-size:20px;
    font-weight:bold;
}

.student{
    font-size:28px;
    font-weight:bold;
    color:#2c3e50;
}

.points{
    font-size:24px;
    font-weight:bold;
    color:#f39c12;
}


/* =========================================
   Title
========================================= */

.title{
    text-align:center;
    margin-bottom:40px;
}

.title h1{
    font-size:52px;
    color:#2c3e50;
    margin-bottom:10px;
}

.title p{
    font-size:22px;
    color:#666;
}


/* =========================================
   Level Cards
========================================= */

.levels{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:30px;
}

.levelCard{
    background:#fff;
    padding:35px;
    text-align:center;
    border-radius:20px;
    box-shadow:0 8px 25px rgba(0,0,0,.08);
    transition:.25s;
}

.levelCard:hover{
    transform:translateY(-8px);
}

.locked{
    opacity:.55;
}

.levelIcon{
    font-size:70px;
    margin-bottom:20px;
}

.levelName{
    font-size:32px;
    font-weight:bold;
    color:#2c3e50;
    margin-bottom:15px;
}

.levelDesc{
    min-height:55px;
    margin-bottom:30px;
    font-size:20px;
    color:#666;
}


/* =========================================
   Lesson Grid
========================================= */

.lessonGrid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:12px;
    margin-top:25px;
}


/* =========================================
   Buttons
========================================= */

.playButton{
    width:100%;
    height:62px;
    border:none;
    border-radius:12px;
    cursor:pointer;
    color:#fff;
    font-size:24px;
    font-weight:bold;
    transition:.2s;
}

.playButton:hover{
    transform:scale(1.03);
}

.playButton:disabled{
    background:#cfd6df !important;
    color:#666;
    cursor:not-allowed;
    transform:none;
}


/* =========================================
   Progress Box
========================================= */

.progressBox{
    margin-top:40px;
    background:#fff;
    padding:30px;
    border-radius:20px;
    box-shadow:0 8px 25px rgba(0,0,0,.08);
}

.progressBox h2{
    margin-bottom:20px;
    color:#2c3e50;
}

.progressBar{
    height:24px;
    background:#dbe5f1;
    border-radius:30px;
    overflow:hidden;
}

.progressFill{
    height:100%;
    width:35%;
    background:#27ae60;
}