/* ════════════════════════════════════════════════
   Quiz
   ════════════════════════════════════════════════ */

/* ═══════════════════════════════════════════════
   QUIZ
   ═══════════════════════════════════════════════ */
.quiz-card { position: relative; }
.quiz-progress-bar {
    height: 4px; background: rgba(255,255,255,0.06);
    border-radius: 2px; margin-bottom: 8px; overflow: hidden;
}
.quiz-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    border-radius: 2px; width: 0%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.quiz-progress-text { font-size: 12px; color: var(--text-muted); margin-bottom: 24px; }

.quiz-header-right { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.quiz-score-badge {
    font-size: 13px; font-weight: 700; color: white;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    padding: 4px 12px; border-radius: 20px;
}

/* ── Flashcard export dropdown ── */
.fc-dropdown { position: relative; }
.fc-export-btn {
    display: flex; align-items: center; gap: 6px;
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: #fbbf24;
    padding: 5px 12px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 12px; font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}
.fc-export-btn svg { width: 14px; height: 14px; }
.fc-chevron { width: 12px !important; height: 12px !important; transition: transform var(--transition); }
.fc-export-btn.open .fc-chevron { transform: rotate(180deg); }
.fc-export-btn:hover { background: rgba(251,191,36,0.18); border-color: #fbbf24; }

.fc-menu {
    position: absolute; top: calc(100% + 8px); right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 16px 40px rgba(0,0,0,0.5);
    min-width: 210px;
    z-index: 100;
    overflow: hidden;
    animation: fadeInUp 0.15s ease both;
}
.fc-menu-item {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 14px;
    background: transparent;
    border: none; border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font);
    cursor: pointer; width: 100%; text-align: left;
    transition: background var(--transition);
}
.fc-menu-item:last-child { border-bottom: none; }
.fc-menu-item:hover { background: rgba(255,255,255,0.05); }
.fc-menu-icon { font-size: 18px; flex-shrink: 0; }
.fc-menu-title { font-size: 13px; font-weight: 600; }
.fc-menu-sub { font-size: 11px; color: var(--text-muted); margin-top: 1px; }

/* Question */
.quiz-question { animation: fadeInUp 0.35s ease both; }
.quiz-question-header { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
.quiz-diff-badge {
    font-size: 10px; font-weight: 700; text-transform: uppercase;
    padding: 3px 9px; border-radius: 4px; letter-spacing: 0.5px;
}
.quiz-diff-badge.easy   { background: var(--success-bg); color: var(--success); }
.quiz-diff-badge.medium { background: rgba(245,158,11,0.1); color: var(--warning); }
.quiz-diff-badge.hard   { background: var(--error-bg);   color: var(--error);   }

.quiz-ts-btn {
    display: inline-flex; align-items: center; gap: 5px;
    font-size: 11px; font-weight: 600;
    color: var(--accent-light);
    background: rgba(139,92,246,0.1);
    border: 1px solid rgba(139,92,246,0.2);
    padding: 3px 10px; border-radius: 4px;
    cursor: pointer;
    font-family: var(--font-mono);
    transition: all var(--transition);
}
.quiz-ts-btn:hover { background: rgba(139,92,246,0.22); }

.quiz-question-text {
    font-size: 16px; font-weight: 600; line-height: 1.55;
    margin-bottom: 20px;
}

/* Options */
.quiz-options { display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
.quiz-option {
    display: flex; align-items: flex-start; gap: 13px;
    padding: 14px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    background: transparent;
    text-align: left; width: 100%;
    font-family: var(--font);
    color: var(--text-primary);
}
.quiz-option:hover:not(:disabled) {
    border-color: rgba(139,92,246,0.4);
    background: rgba(139,92,246,0.06);
}
.quiz-option.correct {
    border-color: var(--success);
    background: var(--success-bg);
}
.quiz-option.wrong {
    border-color: var(--error);
    background: var(--error-bg);
}
.quiz-option.reveal-correct {
    border-color: var(--success);
    background: var(--success-bg);
}
.quiz-option:disabled { cursor: not-allowed; }

.option-letter {
    width: 26px; height: 26px; flex-shrink: 0;
    border-radius: 7px;
    border: 1.5px solid var(--border);
    display: flex; align-items: center; justify-content: center;
    font-size: 11px; font-weight: 700;
    font-family: var(--font-mono);
    transition: all var(--transition);
}
.quiz-option:hover:not(:disabled) .option-letter { border-color: var(--accent); color: var(--accent-light); }
.quiz-option.correct .option-letter       { border-color: var(--success); background: var(--success); color: white; }
.quiz-option.wrong .option-letter         { border-color: var(--error);   background: var(--error);   color: white; }
.quiz-option.reveal-correct .option-letter { border-color: var(--success); background: var(--success); color: white; }

.option-text { font-size: 14px; line-height: 1.5; }

/* Explanation */
.quiz-explanation {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    margin-bottom: 16px;
    animation: fadeInUp 0.3s ease both;
}
.quiz-explanation-label {
    font-size: 11px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.5px; color: var(--text-muted); margin-bottom: 6px;
}
.quiz-explanation-text { font-size: 13px; color: var(--text-secondary); line-height: 1.65; }

/* Nav buttons */
.quiz-nav { display: flex; justify-content: flex-end; gap: 10px; }
.quiz-btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 11px 22px; border-radius: var(--radius-md);
    font-family: var(--font); font-size: 14px; font-weight: 600;
    cursor: pointer; transition: all var(--transition);
}
.quiz-btn svg { width: 16px; height: 16px; }
.quiz-btn-skip {
    background: transparent; border: 1px solid var(--border); color: var(--text-muted);
}
.quiz-btn-skip:hover { color: var(--text-primary); border-color: rgba(255,255,255,0.2); }
.quiz-btn-next {
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border: none; color: white;
    box-shadow: 0 4px 14px rgba(109,40,217,0.35);
}
.quiz-btn-next:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(109,40,217,0.5); }

/* Quiz results screen */
.quiz-results { text-align: center; padding: 20px 0; animation: fadeInUp 0.45s ease both; }
.results-emoji { font-size: 72px; margin-bottom: 18px; animation: bounceIn 0.7s ease; }
@keyframes bounceIn {
    0%   { transform: scale(0); }
    60%  { transform: scale(1.15); }
    100% { transform: scale(1); }
}
.results-title { font-size: 24px; font-weight: 800; margin-bottom: 8px; }
.results-score {
    font-size: 56px; font-weight: 900; letter-spacing: -2px;
    background: linear-gradient(135deg, var(--accent-light), var(--blue));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    margin-bottom: 10px;
}
.results-message { font-size: 15px; color: var(--text-secondary); margin-bottom: 28px; }
.results-breakdown { display: flex; justify-content: center; gap: 32px; margin-bottom: 28px; }
.breakdown-item { text-align: center; }
.breakdown-num { font-size: 28px; font-weight: 800; display: block; }
.breakdown-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; display: block; }

.retry-quiz-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 12px 30px;
    border-radius: var(--radius-md);
    font-family: var(--font); font-size: 14px; font-weight: 600;
    cursor: pointer; transition: all var(--transition);
}
.retry-quiz-btn:hover { border-color: var(--accent); color: var(--accent-light); }

/* Quiz results action row */
.quiz-results-actions {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

/* Analyze weak areas button */
.analyze-quiz-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    border: none !important;
    color: white !important;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 14px rgba(109, 40, 217, 0.35);
}
.analyze-quiz-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(109, 40, 217, 0.5);
    filter: brightness(1.1);
}
.analyze-quiz-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
}
.analyze-quiz-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.analyze-quiz-btn svg.spin {
    animation: spinIcon 1s linear infinite;
}

/* ═══════════════════════════════════════════════
   QUIZ ANALYSIS RESULTS
   ═══════════════════════════════════════════════ */
.quiz-analysis-result {
    text-align: left;
    margin-top: 24px;
    animation: fadeInUp 0.4s ease both;
}

/* Summary card */
.qa-summary {
    padding: 16px 18px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    margin-bottom: 20px;
}
.qa-rating {
    font-size: 18px;
    font-weight: 800;
    margin-bottom: 8px;
}
.qa-summary-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0;
}

/* Sections */
.qa-section {
    margin-bottom: 20px;
}
.qa-section-title {
    font-size: 14px;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--text-primary);
}
.qa-section-title.qa-weak { color: #f59e0b; }
.qa-section-title.qa-strong { color: #10b981; }

/* Cards */
.qa-card {
    padding: 14px 16px;
    border-radius: 10px;
    margin-bottom: 10px;
    border: 1px solid transparent;
}
.qa-card-weak {
    background: rgba(245, 158, 11, 0.06);
    border-color: rgba(245, 158, 11, 0.15);
}
.qa-card-strong {
    background: rgba(16, 185, 129, 0.06);
    border-color: rgba(16, 185, 129, 0.15);
}
.qa-card-topic {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 5px;
}
.qa-card-detail {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
}
.qa-card-tip {
    font-size: 12px;
    color: var(--accent-light);
    background: rgba(139, 92, 246, 0.08);
    padding: 8px 12px;
    border-radius: 8px;
    line-height: 1.5;
}

/* Study plan */
.qa-study-plan {
    margin: 0;
    padding-left: 20px;
    list-style: none;
    counter-reset: study-step;
}
.qa-study-plan li {
    position: relative;
    padding: 10px 14px 10px 32px;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px solid var(--border);
    counter-increment: study-step;
}
.qa-study-plan li::before {
    content: counter(study-step);
    position: absolute;
    left: 10px;
    top: 10px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #8b5cf6, #6d28d9);
    color: white;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Misconceptions */
.qa-misconception {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 10px 14px;
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.12);
    border-radius: 8px;
    margin-bottom: 6px;
}