/* ============================================================
   EduConnect AI - quiz.css
   Styles for Quiz taking and Results
   ============================================================ */

#quiz-header {
    background: var(--card-bg);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-radius: var(--radius);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

#quiz-progress {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 12px;
    border-radius: 99px;
    margin-bottom: 24px;
    border: none;
    overflow: hidden;
}

#quiz-progress::-webkit-progress-bar { 
    background-color: var(--accent-color); 
    border-radius: 99px; 
}
#quiz-progress::-webkit-progress-value { 
    background: var(--primary-gradient); 
    border-radius: 99px; 
    transition: width 0.4s ease;
}

.question-card {
    background: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.question-text {
    font-size: 22px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-color);
    margin-bottom: 28px;
}

.options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.option-btn {
    padding: 18px 24px;
    text-align: left;
    background: var(--bg-color);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
}

.option-btn:hover {
    border-color: var(--primary-color);
    background: var(--accent-color);
    transform: translateY(-1px);
}

.option-btn.correct { 
    background: rgba(16, 185, 129, 0.1) !important; 
    border-color: var(--success) !important; 
    color: #065F46 !important; 
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.2);
    font-weight: 600;
}
.option-btn.wrong { 
    background: rgba(239, 68, 68, 0.1) !important; 
    border-color: var(--danger) !important; 
    color: #991B1B !important; 
    box-shadow: 0 0 12px rgba(239, 68, 68, 0.2);
    font-weight: 600;
}

body.dark .option-btn.correct {
    color: #A7F3D0 !important;
}
body.dark .option-btn.wrong {
    color: #FCA5A5 !important;
}

/* Subject Grid styling */
#subject-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)) !important;
    gap: 16px;
    margin: 24px 0;
}

.subject-card {
    cursor: pointer;
    text-align: center;
    padding: 24px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--card-bg);
    transition: var(--transition);
    font-weight: 600;
    font-size: 15px;
    box-shadow: var(--shadow);
}

.subject-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    background: var(--accent-color);
    color: var(--primary-color);
}

.subject-card.selected {
    border-color: var(--primary-color);
    background: var(--primary-gradient);
    color: white !important;
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
}

/* Result screen */
.result-header {
    text-align: center;
    padding: 40px 0;
}

.score-circle {
    width: 160px;
    height: 160px;
    border: 8px solid var(--accent-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-md);
    background: var(--card-bg);
}

.score-value { 
    font-size: 40px; 
    font-weight: 800; 
    color: var(--primary-color);
}
.score-label { 
    font-size: 13px; 
    color: var(--text-muted); 
    font-weight: 600;
}

.exp-popup {
    animation: floatUp 2s forwards;
    color: var(--exp-bar);
    font-weight: bold;
}

@keyframes floatUp {
    from { transform: translateY(0); opacity: 1; }
    to { transform: translateY(-50px); opacity: 0; }
}

/* Shake animation for wrong answers */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    15%, 45%, 75% { transform: translateX(-6px); }
    30%, 60%, 90% { transform: translateX(6px); }
}
.shake-element {
    animation: shake 0.5s ease-in-out;
}

.subject-card-modern .card-actions-mini button,
.paper-card-modern .paper-actions button {
    padding: 8px 5px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

#pet-quiz-guide .btn-lg {
    padding: 20px 30px;
    min-width: 250px;
    border-radius: 15px;
    font-size: 18px;
    line-height: 1.4;
    transition: transform 0.2s;
}

#pet-quiz-guide .btn-lg:hover {
    transform: scale(1.05);
}

#pet-quiz-guide .btn-lg small {
    display: block;
    font-size: 12px;
    opacity: 0.8;
    font-weight: normal;
}

/* Confetti particles */
/* Modern Subject Grid */
.subject-grid-modern {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.subject-card-modern {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.subject-card-modern:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.subject-card-modern .save-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: transparent;
    border: none;
    font-size: 18px;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
    padding: 5px;
    z-index: 2;
}

.subject-card-modern .save-btn:hover {
    opacity: 1;
}

.subject-card-modern .save-btn.active {
    opacity: 1;
    color: #faad14;
}

.subject-card-modern .title {
    font-weight: bold;
    font-size: 15px;
    margin-right: 25px; /* tránh nút save */
    color: var(--text-color);
}

.subject-card-modern .meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
}

.subject-card-modern .stats {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-muted);
}

/* History Item */
.history-item-mini {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: background 0.2s;
}

.history-item-mini:hover {
    background: var(--accent-color);
}

.history-item-mini .info h4 {
    margin: 0;
    font-size: 14px;
}

.history-item-mini .info small {
    color: var(--text-muted);
    font-size: 11px;
}

.history-item-mini .score-badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-weight: bold;
    font-size: 12px;
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Paper Grid & Card */
.paper-grid-modern {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.paper-card-modern {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
    overflow: hidden;
}

.paper-card-modern:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.paper-card-modern .paper-type-icon {
    width: 45px;
    height: 45px;
    background: var(--accent-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 5px;
}

.paper-card-modern h4 {
    margin: 0;
    font-size: 16px;
    line-height: 1.4;
    color: var(--text-color);
    height: 44px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.paper-card-modern .paper-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-muted);
}

.paper-card-modern .paper-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.paper-card-modern .uploader {
    font-size: 12px;
    color: var(--primary-color);
    font-weight: bold;
}

.btn-start-now {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: bold;
    cursor: pointer;
}