@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');

:root {
    --primary-color: #4a90e2;
    --secondary-color: #f5a623;
    --background-color: #f4f7f9;
    --text-color: #333;
    --white: #fff;
    --correct-color: #28a745; 
    --incorrect-color: #dc3545;
    --border-radius: 12px;
    --box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.main-container {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1rem;
}

.card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
}

h1, h2, h3 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-group input, 
.form-group select, 
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Poppins', sans-serif;
}

.form-group textarea {
    min-height: 200px;
    resize: vertical;
}

.btn {
    display: inline-block;
    background: linear-gradient(145deg, var(--primary-color), #3a7ac8);
    color: var(--white);
    border: none;
    padding: 12px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(74,144,226,0.4);
    text-decoration: none;
    margin-top: 1rem;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(74,144,226,0.5);
}

.btn-secondary {
     background: linear-gradient(145deg, #6c757d, #5a6268);
     box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

#quiz-list .grade-section {
    margin-bottom: 1.5rem;
}

#quiz-list h3 {
    text-align: left;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

#quiz-list ul {
    list-style: none;
    padding-left: 0;
}

#quiz-list li {
    margin-bottom: 0.5rem;
}

#quiz-list a {
    text-decoration: none;
    color: var(--text-color);
    background-color: #f0f0f0;
    display: block;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
}

#quiz-list a:hover {
    background-color: #e0e0e0;
    color: var(--primary-color);
}

/* Quiz Player Styles */
#quiz-player-screen .container{width:100%;max-width:800px;background-color:var(--white);border-radius:var(--border-radius);box-shadow:var(--box-shadow);overflow:hidden;padding:2rem;text-align:center}
#quiz-player-screen #quiz-container h1{font-size:2rem;color:var(--primary-color);margin-bottom:2rem}
#quiz-player-screen #question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid #e0e0e0}
#quiz-player-screen #question-counter{background-color:var(--primary-color);color:var(--white);padding:5px 15px;border-radius:20px;font-weight:600}
#quiz-player-screen #question-category{font-weight:600;color:#555}
#quiz-player-screen #question-text{font-size:1.3rem;margin-bottom:2rem;text-align:left}
#quiz-player-screen .options-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:15px;margin-bottom:2rem}
#quiz-player-screen .option-btn{width:100%;background-color:#f0f0f0;border:2px solid #ddd;border-radius:var(--border-radius);padding:15px;font-size:1rem;text-align:left;cursor:pointer;transition:all .2s ease}
#quiz-player-screen .option-btn:not([disabled]):hover{background-color:#e0e0e0;border-color:var(--primary-color)}
#quiz-player-screen .option-btn.correct{background-color:var(--correct-color) !important;border-color:var(--correct-color) !important;color:var(--white);font-weight:700}
#quiz-player-screen .option-btn.incorrect{background-color:var(--incorrect-color);border-color:var(--incorrect-color);color:var(--white);font-weight:700}
#quiz-player-screen #explanation{display:none;background-color:#fffbe6;border:1px solid #ffeeba;border-radius:var(--border-radius);padding:1.5rem;margin-top:1.5rem;text-align:left}
#quiz-player-screen #explanation h3{color:var(--secondary-color);margin-bottom:.5rem}
#quiz-player-screen #navigation{display:flex;justify-content:flex-end;align-items:center}
#quiz-player-screen #next-btn{background-color:var(--secondary-color);color:var(--white);border:none;padding:10px 25px;font-size:1rem;font-weight:600;border-radius:50px;cursor:pointer;transition:background-color .3s ease;display:none; margin-top:0;}
#quiz-player-screen #next-btn:hover{background-color:#d9901e}
#quiz-player-screen #results-container h2{font-size:2.2rem;color:var(--primary-color);margin-bottom:1rem}
#quiz-player-screen #score{font-size:1.5rem;margin-bottom:2rem}
#quiz-player-screen .control-btn{background:linear-gradient(145deg,var(--primary-color),#3a7ac8);color:var(--white);border:none;padding:15px 30px;font-size:1.2rem;font-weight:600;border-radius:50px;cursor:pointer;transition:all .3s ease;box-shadow:0 4px 10px rgba(74,144,226,.4);margin:0 10px;text-decoration:none}
#quiz-player-screen .control-btn:hover{transform:translateY(-3px);box-shadow:0 6px 15px rgba(74,144,226,.5)}

.modal{display:none;position:fixed;z-index:1;left:0;top:0;width:100%;height:100%;overflow:auto;background-color:rgba(0,0,0,.5);justify-content:center;align-items:center}
.modal-content{background-color:#fefefe;margin:auto;padding:30px;border:1px solid #888;width:90%;max-width:400px;border-radius:var(--border-radius);text-align:center;box-shadow:0 5px 20px rgba(0,0,0,.2)}
.modal-content p{font-size:1.2rem;margin-bottom:20px}
.modal-buttons{display:flex;justify-content:center;gap:15px}
.modal-btn{border:none;padding:12px 25px;font-size:1rem;font-weight:600;border-radius:50px;cursor:pointer;transition:all .3s ease}
.modal-btn.confirm{background-color:var(--correct-color);color:#fff}
.modal-btn.cancel{background-color:#f0f0f0;color:#333}