:root{--ink:#1a1a2e;--parchment:#f5f0e8;--gold:#c9a84c;--gold-light:#f0e5c9;--crimson:#9b2335;--green:#2d6a4f;--green-light:#d8f3dc;--red-light:#fce4e4;--blue:#1d3557;--muted:#6c757d;--hi:#b3120f;--hi-bg:#ffe3e0;--med:#b06f00;--med-bg:#fff2d6;--low:#3a6ea5;--low-bg:#e3eefc;--purple:#5b3a86}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:Georgia,'Times New Roman',serif;background:var(--parchment);color:var(--ink);line-height:1.6}
header{background:var(--ink);color:var(--parchment);text-align:center;padding:40px 20px 30px;border-bottom:4px solid var(--gold)}
header h1{font-size:2.25rem;font-weight:900;letter-spacing:1px}
header p{opacity:.86;margin-top:7px;font-size:1.05rem}
.stats-bar{position:sticky;top:0;z-index:100;background:var(--ink);color:var(--parchment);display:flex;justify-content:center;align-items:center;gap:28px;padding:10px 20px;font-weight:700;font-size:.95rem;border-bottom:2px solid var(--gold);flex-wrap:wrap}
.stats-bar span{display:flex;align-items:center;gap:6px}
.container{max-width:980px;margin:0 auto;padding:20px}
.toc{background:#fff;border:1px solid #ddd;border-left:5px solid var(--gold);border-radius:8px;padding:20px 25px;margin:25px 0}
.toc h2{font-size:1.4rem;margin-bottom:12px}
.toc a{display:block;padding:5px 0;color:var(--blue);text-decoration:none;font-weight:700;border-bottom:1px dashed #eee;transition:.2s;font-size:.95rem}
.toc a:hover{color:var(--crimson);padding-left:8px}
.toc a .count{color:var(--muted);font-weight:400;font-size:.88rem}
.part-header{font-size:1.5rem;font-weight:900;margin:40px 0 5px;padding:12px 18px;background:linear-gradient(135deg,var(--gold-light) 0%,#fff 100%);border-left:6px solid var(--gold);border-radius:0 8px 8px 0}
.part-desc{font-size:.93rem;color:var(--muted);margin:0 0 20px 18px;font-style:italic}
.q-card{background:#fff;border-radius:10px;padding:22px;margin-bottom:18px;border:1px solid #e0dcd4;box-shadow:0 2px 6px rgba(0,0,0,.04);transition:border-color .3s}
.q-card.answered-correct{border-left:5px solid var(--green)}
.q-card.answered-wrong{border-left:5px solid var(--crimson)}
.q-card.disputed{background:#fffdf5;border:1.5px dashed var(--crimson)}
.q-head{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:8px}
.q-num{font-weight:900;font-size:.85rem;color:var(--gold);text-transform:uppercase;letter-spacing:1px}
.q-tags{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.tag{display:inline-block;border-radius:999px;padding:3px 10px;font-size:.72rem;font-weight:900;letter-spacing:.05em;text-transform:uppercase;border:1.5px solid}
.tag-high{background:var(--hi-bg);color:var(--hi);border-color:var(--hi)}
.tag-medium{background:var(--med-bg);color:var(--med);border-color:var(--med)}
.tag-low{background:var(--low-bg);color:var(--low);border-color:var(--low)}
.tag-exam{background:var(--ink);color:var(--gold-light);border-color:var(--gold)}
.tag-idea{background:#efe7f7;color:var(--purple);border-color:#8a6bb8}
.tag-play{background:#e8f1ec;color:var(--green);border-color:var(--green)}
.tag-dispute{background:var(--crimson);color:#fff;border-color:var(--crimson)}
.q-text{font-size:1.08rem;font-weight:700;margin-bottom:16px;line-height:1.55}
.q-quote{background:#fffdf4;border-left:4px solid var(--gold);border-radius:0 6px 6px 0;padding:9px 13px;margin:0 0 13px;font-style:italic;color:#5d4e37;font-size:1rem;white-space:pre-line}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:680px){.opts{grid-template-columns:1fr}header h1{font-size:1.7rem}}
.opt-btn{display:block;width:100%;text-align:left;padding:12px 14px;background:#fafaf7;border:1.5px solid #ddd;border-radius:8px;font-size:.98rem;cursor:pointer;transition:.2s;font-family:inherit;color:var(--ink)}
.opt-btn:hover:not(.locked){background:#eef;border-color:var(--blue)}
.opt-btn.correct{background:var(--green-light);border-color:var(--green);color:#155724;font-weight:700}
.opt-btn.wrong{background:var(--red-light);border-color:var(--crimson);color:#721c24}
.opt-btn.printed{background:var(--med-bg);border-color:var(--med);color:#7a5b00;font-weight:700}
.opt-btn.locked{cursor:default;opacity:.92}
.explanation{display:none;margin-top:14px;padding:10px 14px;background:#fff8e1;border-left:4px solid var(--gold);border-radius:4px;font-size:.94rem;color:#5d4e37;line-height:1.5}
.exp-note{display:block;margin-top:7px;padding-top:7px;border-top:1px dashed #d9c89a;color:#7a5b2a;font-size:.9rem}
.exp-trick{display:block;margin-top:7px;padding-top:7px;border-top:1px dashed #d9c89a;color:#8a3324;font-size:.9rem;font-style:italic}
.exp-dispute{display:block;margin-top:8px;padding:8px 11px;background:var(--red-light);border-left:4px solid var(--crimson);border-radius:4px;color:#721c24;font-size:.9rem;font-weight:700}
.controls-section{text-align:center;margin:20px 0}
.ctrl-btn{padding:10px 24px;border:none;border-radius:25px;font-weight:700;cursor:pointer;font-size:.95rem;transition:.2s;margin:4px;font-family:inherit}
.ctrl-btn:hover{transform:translateY(-1px)}
.btn-reveal{background:var(--blue);color:#fff}
.btn-reset{background:var(--muted);color:#fff}
.btn-hide{background:var(--crimson);color:#fff}
footer{text-align:center;padding:30px 20px;color:var(--muted);font-size:.88rem;border-top:2px solid var(--gold);margin-top:40px}
.badge{display:inline-block;background:var(--gold-light);color:var(--ink);border:1px solid var(--gold);border-radius:999px;padding:4px 10px;margin-top:10px;font-weight:700;font-size:.9rem}
.filter-panel{background:#fff;border:1px solid #ddd;border-left:5px solid var(--crimson);border-radius:8px;padding:16px 20px;margin:25px 0}
.filter-panel h2{font-size:1.25rem;margin-bottom:4px}
.filter-panel .fp-sub{font-size:.88rem;color:var(--muted);font-style:italic;margin-bottom:12px}
.f-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:10px}
.f-label{font-size:.78rem;font-weight:900;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);min-width:112px}
.f-btn{font-family:inherit;font-weight:900;font-size:.82rem;padding:7px 13px;border-radius:999px;border:1.5px solid #ccc;background:#fafaf7;color:var(--ink);cursor:pointer;transition:.15s}
.f-btn:hover{border-color:var(--blue)}
.f-btn.active{background:var(--ink);color:var(--gold-light);border-color:var(--gold)}
.f-btn.active.lv-high{background:var(--hi);border-color:var(--hi);color:#fff}
.f-btn.active.lv-medium{background:var(--med);border-color:var(--med);color:#fff}
.f-btn.active.lv-low{background:var(--low);border-color:var(--low);color:#fff}
.f-count{font-weight:400;opacity:.8}
.filter-status{font-size:.9rem;font-weight:700;color:var(--crimson);margin-top:6px}
.q-card.hidden-by-filter,.part-block.hidden-by-filter{display:none}
.search-box{font-family:inherit;font-size:.92rem;padding:8px 12px;border:1.5px solid #ccc;border-radius:8px;flex:1 1 200px;min-width:160px;background:#fafaf7;color:var(--ink)}
.legend{background:#fffdf7;border:1px dashed var(--gold);border-radius:8px;padding:12px 16px;margin:18px 0;font-size:.88rem;color:#5d4e37}
.legend b{color:var(--ink)}
.legend ul{margin:8px 0 0 18px}
.legend li{margin-bottom:3px}
.brief{background:#fff;border:1px solid #ddd;border-left:5px solid var(--blue);border-radius:8px;padding:18px 22px;margin:25px 0}
.brief h3{font-size:1rem;margin:14px 0 5px;color:var(--crimson)}
.brief ul{margin:0 0 0 20px;font-size:.93rem}
.brief li{margin-bottom:5px}
.brief p{font-size:.93rem}
.brief table{width:100%;border-collapse:collapse;font-size:.86rem;margin-top:8px}
.brief th,.brief td{border:1px solid #e0dcd4;padding:5px 8px;text-align:left;vertical-align:top}
.brief th{background:var(--gold-light);font-weight:900}
.quiz-shell-nav{position:sticky;top:0;z-index:300;background:var(--ink);color:var(--parchment);border-bottom:2px solid var(--gold);box-shadow:0 2px 10px rgba(0,0,0,.08)}
.quiz-shell-nav__inner{max-width:1120px;margin:0 auto;padding:8px 14px;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}
.quiz-shell-nav__brand{font-weight:900;letter-spacing:.04em;text-transform:uppercase;font-size:.82rem;white-space:nowrap}
.quiz-shell-nav__links{display:flex;align-items:center;gap:7px;flex-wrap:wrap}
.quiz-shell-nav a,.quiz-shell-nav button{font:700 .86rem Georgia,'Times New Roman',serif;color:inherit;background:rgba(255,255,255,.05);border:1px solid rgba(240,229,201,.35);border-radius:999px;text-decoration:none;padding:6px 11px;cursor:pointer;line-height:1.2;min-height:32px;display:inline-flex;align-items:center;justify-content:center;transition:.2s}
.quiz-shell-nav a:hover,.quiz-shell-nav button:hover{background:var(--gold-light);color:var(--ink);border-color:var(--gold)}
@media(max-width:680px){.quiz-shell-nav__inner{align-items:flex-start}.quiz-shell-nav__brand{width:100%}.quiz-shell-nav__links{width:100%}.quiz-shell-nav a,.quiz-shell-nav button{flex:1 1 auto}}
.quiz-progress-shell{position:fixed;left:50%;bottom:14px;transform:translateX(-50%);z-index:900;width:min(760px,calc(100vw - 24px));pointer-events:none}
.quiz-progress-card{background:rgba(255,253,248,.97);border:1px solid #e0dcd4;border-left:5px solid var(--gold);border-radius:8px;padding:10px 12px;box-shadow:0 10px 28px rgba(26,26,46,.18);backdrop-filter:blur(8px);pointer-events:auto}
.quiz-progress-top{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:7px;font-weight:900}
.quiz-progress-title{font-size:.88rem;letter-spacing:.04em;text-transform:uppercase}
.quiz-progress-count{font-size:1rem}
.quiz-progress-count strong{color:var(--crimson);font-size:1.08em}
.quiz-progress-track{height:10px;background:var(--gold-light);border:1px solid rgba(201,168,76,.55);border-radius:999px;overflow:hidden}
.quiz-progress-fill{height:100%;width:0%;background:linear-gradient(90deg,var(--gold),var(--green));border-radius:999px;transition:width .18s ease}
.quiz-progress-sub{margin-top:6px;font-size:.82rem;color:var(--muted);font-weight:700;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
@media(max-width:680px){.quiz-progress-shell{bottom:8px;width:calc(100vw - 16px)}}
@media(print){.quiz-progress-shell,.filter-panel,.quiz-shell-nav{display:none}}