/* Styles for quiz.html */
.quiz-layout { display:grid; grid-template-columns:1fr; gap:2.5rem; margin-bottom:3rem; }
@media(min-width:992px){ .quiz-layout { grid-template-columns:1.8fr 1fr; } }
.quiz-card { background:var(--card-bg); border:1px solid var(--border-color); border-radius:var(--radius-lg); padding:2.5rem; box-shadow:var(--card-shadow); position:relative; overflow:hidden; }
.quiz-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:var(--accent-gradient); }
.quiz-tabs { display:flex; gap:.5rem; margin-bottom:2rem; flex-wrap:wrap; }
.quiz-tab { background:var(--bg-tertiary); border:1px solid var(--border-color); color:var(--text-secondary); padding:.45rem 1.1rem; border-radius:20px; font-size:.85rem; font-weight:600; cursor:pointer; transition:var(--transition); font-family:var(--font-sans); display:inline-flex; align-items:center; gap:.4rem; }
.quiz-tab:hover { color:var(--text-primary); border-color:var(--border-hover); }
.quiz-tab.active { background:var(--accent-gradient); color:#fff; border-color:transparent; }
.quiz-tab-count { font-size:.7rem; background:rgba(255,255,255,.2); padding:.1rem .4rem; border-radius:10px; }
.quiz-tab:not(.active) .quiz-tab-count { background:var(--bg-primary); color:var(--text-muted); }
.quiz-spinner { width:36px; height:36px; border:3px solid var(--border-color); border-top-color:var(--accent-blue); border-radius:50%; animation:spin .8s linear infinite; margin:0 auto; }
@keyframes spin { to { transform:rotate(360deg); } }
.quiz-progress-wrap { margin-bottom:2rem; }
.quiz-progress-info { display:flex; justify-content:space-between; font-size:.8rem; color:var(--text-muted); margin-bottom:.5rem; }
.quiz-progress-bar { height:6px; background:var(--bg-tertiary); border-radius:10px; overflow:hidden; }
.quiz-progress-fill { height:100%; background:var(--accent-gradient); border-radius:10px; transition:width .4s ease; }
.quiz-question-num { font-size:.75rem; font-weight:700; text-transform:uppercase; letter-spacing:.08em; color:var(--accent-blue); margin-bottom:.75rem; }
.quiz-question-text { font-size:1.25rem; margin-bottom:2rem; line-height:1.45; }
.quiz-options { display:flex; flex-direction:column; gap:.85rem; margin-bottom:1.75rem; }
.quiz-option { display:flex; align-items:center; gap:1rem; background:var(--bg-tertiary); border:1px solid var(--border-color); border-radius:var(--radius-sm); padding:1rem 1.25rem; cursor:pointer; transition:var(--transition); font-family:var(--font-sans); font-size:.95rem; color:var(--text-primary); text-align:left; width:100%; }
.quiz-option:hover:not(:disabled) { border-color:var(--border-hover); background:var(--card-bg); }
.quiz-option .opt-letter { min-width:28px; height:28px; border-radius:50%; background:var(--bg-primary); border:1px solid var(--border-color); display:flex; align-items:center; justify-content:center; font-size:.75rem; font-weight:700; flex-shrink:0; transition:var(--transition); }
.quiz-option.correct { border-color:var(--accent-emerald); background:rgba(16,185,129,.08); }
.quiz-option.correct .opt-letter { background:var(--accent-emerald); color:#fff; border-color:var(--accent-emerald); }
.quiz-option.wrong { border-color:#ef4444; background:rgba(239,68,68,.08); }
.quiz-option.wrong .opt-letter { background:#ef4444; color:#fff; border-color:#ef4444; }
.quiz-option:disabled { cursor:not-allowed; opacity:.75; }
.quiz-explanation { display:none; background:rgba(59,130,246,.07); border:1px solid rgba(59,130,246,.2); border-radius:var(--radius-sm); padding:1rem 1.25rem; font-size:.88rem; color:var(--text-secondary); line-height:1.6; margin-bottom:1.75rem; }
.quiz-explanation.visible { display:block; }
.quiz-explanation strong { color:var(--text-primary); }
.quiz-nav { display:flex; justify-content:space-between; gap:1rem; }
.quiz-btn { min-width:130px; padding:.75rem 1.5rem; text-align:center; }
.btn-secondary { background:none; border:1px solid var(--border-hover); color:var(--text-primary); border-radius:var(--radius-sm); font-weight:600; cursor:pointer; transition:var(--transition); font-family:var(--font-sans); }
.btn-secondary:hover { background:var(--bg-tertiary); }
.quiz-results { text-align:center; padding:2rem 0; }
.result-icon { font-size:4rem; margin-bottom:1rem; }
.quiz-results h2 { font-size:1.8rem; margin-bottom:1rem; }
.result-score { font-size:3.5rem; font-weight:800; background:var(--accent-gradient); -webkit-background-clip:text; -webkit-text-fill-color:transparent; margin-bottom:.5rem; }
.result-msg { color:var(--text-secondary); max-width:400px; margin:0 auto 2rem; }
.result-breakdown { display:grid; grid-template-columns:repeat(3,1fr); gap:1rem; margin:0 auto; max-width:400px; }
.result-stat { background:var(--bg-tertiary); border-radius:var(--radius-sm); padding:1rem; }
.result-stat-num { font-size:1.6rem; font-weight:800; }
.result-stat-label { font-size:.75rem; color:var(--text-muted); }
.score-ring-wrap { position:relative; width:120px; height:120px; margin:.5rem auto 1.5rem; }
.score-ring { transform:rotate(-90deg); width:100%; height:100%; }
.ring-bg { fill:none; stroke:var(--bg-tertiary); stroke-width:10; }
.ring-fill { fill:none; stroke:url(#grad); stroke-width:10; stroke-linecap:round; stroke-dasharray:251.2; transition:stroke-dashoffset .6s ease; }
.score-ring-label { position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); text-align:center; }
.score-ring-num { display:block; font-size:1.8rem; font-weight:800; line-height:1; }
.score-ring-den { font-size:.75rem; color:var(--text-muted); }
.score-stats { display:flex; justify-content:space-around; text-align:center; }
.score-stat { font-size:.8rem; color:var(--text-muted); }
.score-stat span { display:block; font-size:1.4rem; font-weight:800; color:var(--text-primary); margin-bottom:.2rem; }
.score-stat.correct span { color:var(--accent-emerald); }
.score-stat.wrong span { color:#f87171; }
.tips-list { list-style:none; display:flex; flex-direction:column; gap:.75rem; font-size:.88rem; color:var(--text-secondary); }
.tips-list li { padding-left:1.2rem; position:relative; }
.tips-list li::before { content:'→'; position:absolute; left:0; color:var(--accent-blue); font-weight:700; }