:root{color-scheme:light;--paper:#f5f4ee;--surface:#fffefa;--surface-soft:#eeeee6;--ink:#202a28;--muted:#52615c;--line:#d9ded8;--teal:#1b665f;--teal-dark:#124c47;--teal-pale:#e3f0ed;--gold:#996d1d;--gold-pale:#f7efd9;--red:#a03e39;--red-pale:#f8e8e5;--shadow:0 12px 34px rgba(27,44,41,.055)}*{box-sizing:border-box}html{min-width:320px}body,html{background:var(--paper)}body{margin:0;color:var(--ink);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:15px;line-height:1.55}button,input,select,textarea{font:inherit}a,button,input,select,textarea{-webkit-tap-highlight-color:transparent}a{color:var(--teal-dark);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#0a403b}:focus-visible{outline:3px solid #7dbbb3;outline-offset:3px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(1.8rem,4vw,2.5rem);line-height:1.13;letter-spacing:-.035em}h1,h2{margin-bottom:.55rem}h2{font-size:1.25rem;line-height:1.25;letter-spacing:-.015em}h3{font-size:1rem;margin-bottom:.35rem}p{margin-bottom:.85rem}.muted,small{color:var(--muted)}.app-layout{min-height:100vh;display:grid;grid-template-columns:224px minmax(0,1fr)}.sidebar{background:#e9ece5;border-right:1px solid var(--line);padding:27px 17px;display:flex;flex-direction:column;gap:28px}.brand{display:flex;gap:12px;align-items:center;padding:0 10px;color:var(--ink);text-decoration:none}.brand-mark{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;color:white;background:var(--teal);font-weight:800;letter-spacing:-.05em}.brand-name{display:block;font-size:1.08rem;font-weight:750;line-height:1.12}.brand-sub{display:block;margin-top:3px;color:var(--muted);font-size:.75rem}.nav-list{display:grid;gap:5px}.nav-link{min-height:43px;padding:10px 12px;border-radius:9px;display:flex;gap:11px;align-items:center;color:#46524e;text-decoration:none;font-size:.93rem;font-weight:560}.nav-link:hover{background:rgba(255,255,255,.55);color:var(--ink)}.nav-link.active{background:var(--surface);color:var(--teal-dark);box-shadow:0 2px 9px rgba(32,42,40,.06)}.nav-glyph{width:20px;text-align:center;font-size:1.05rem}.sidebar-bottom{margin-top:auto;border-top:1px solid #d4dbd4;padding:18px 10px 0}.main-column{min-width:0}.topbar{min-height:62px;display:none;align-items:center;justify-content:space-between;padding:10px 18px;border-bottom:1px solid var(--line);background:rgba(255,254,250,.86)}.main-content{width:min(1160px,100%);margin:0 auto;padding:clamp(22px,4vw,46px)}.page-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:25px}.page-heading p{color:var(--muted);margin:0}.eyebrow{color:var(--teal);font-size:.75rem;font-weight:750;text-transform:uppercase;letter-spacing:.1em;margin-bottom:7px}.card,.panel{background:var(--surface);border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow)}.panel{padding:clamp(17px,2.5vw,26px)}.card{padding:20px}.grid{display:grid;gap:16px}.stats-grid{grid-template-columns:repeat(5,minmax(0,1fr));margin-bottom:18px}.stat-card{padding:19px 20px}.stat-label{display:block;color:var(--muted);font-size:.84rem;margin-bottom:9px}.stat-value{font-size:clamp(1.65rem,3vw,2.2rem);font-weight:730;letter-spacing:-.045em;line-height:1}.stat-foot{margin-top:9px;color:var(--muted);font-size:.78rem}.dashboard-columns{grid-template-columns:minmax(0,1.25fr) minmax(270px,.75fr);align-items:start;margin-top:18px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:17px}.section-head h2{margin:0}.mode-list{display:grid;gap:10px}.mode-card{text-align:left;width:100%;background:#fbfcf8;border:1px solid var(--line);border-radius:12px;padding:15px 16px;display:flex;justify-content:space-between;align-items:center;gap:12px;cursor:pointer;transition:border-color .15s,transform .15s,background .15s;color:var(--ink)}.mode-card:hover:not(:disabled){border-color:#90b8b2;background:#f4faf7;transform:translateY(-1px)}.mode-card:disabled{cursor:not-allowed;opacity:.55}.mode-title{font-weight:700;display:block}.mode-description{display:block;margin-top:2px;color:var(--muted);font-size:.84rem}.mode-arrow{color:var(--teal);font-size:1.1rem}.mode-card.primary{background:var(--teal);border-color:var(--teal);color:white}.mode-card.primary .mode-arrow,.mode-card.primary .mode-description{color:#d9eeea}.notice{border-radius:10px;padding:12px 14px;border:1px solid #d4e2db;background:#edf5ef;color:#365a4c;margin:12px 0}.notice.info{border-color:#d8e4df;background:var(--teal-pale);color:#234e49}.notice.warning{border-color:#eadbb7;background:var(--gold-pale);color:#6d531d}.notice.error{border-color:#e8c4bf;background:var(--red-pale);color:#783b37}.notice p:last-child{margin-bottom:0}.button{display:inline-flex;gap:8px;min-height:42px;justify-content:center;align-items:center;padding:9px 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9px;border-radius:99px;background:var(--surface-soft);color:#4f5c58;font-size:.75rem;font-weight:680}.badge.teal{background:var(--teal-pale);color:var(--teal-dark)}.badge.gold{background:var(--gold-pale);color:#745315}.badge.red{background:var(--red-pale);color:#883f3a}.hist-row,.histogram{display:grid;gap:10px}.hist-row{grid-template-columns:40px 1fr 38px;align-items:center;font-size:.82rem}.hist-track{height:9px;border-radius:99px;overflow:hidden;background:#ecefe9}.hist-fill{height:100%;border-radius:inherit;background:#4c968b}.quiz-history{display:grid;gap:0}.history-row{padding:12px 0;border-bottom:1px solid #edf0eb;display:flex;justify-content:space-between;gap:15px;align-items:center}.history-row:last-child{border-bottom:0}.history-title{font-weight:650}.history-meta{color:var(--muted);font-size:.8rem;margin-top:2px}.empty-state{padding:24px 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auto;gap:14px;align-items:center}.question-row:first-child{border-top:0}.question-id{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;color:var(--muted);font-size:.85rem}.question-title-link{color:var(--ink);text-decoration:none;font-weight:620}.question-title-link:hover{color:var(--teal);text-decoration:underline}.question-meta{margin-top:4px;display:flex;gap:6px;flex-wrap:wrap}.pagination{display:flex;align-items:center;justify-content:space-between;padding-top:15px;border-top:1px solid #ecefe9}.answer-list{display:grid;gap:10px;margin:20px 0}.answer-option{display:grid;grid-template-columns:22px 34px 1fr auto;gap:10px;align-items:center;min-height:54px;padding:11px 13px;border:1px solid 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solid var(--line);background:white}.quiz-nav-grid{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0}.quiz-nav-dot{width:35px;height:35px;border-radius:9px;border:1px solid var(--line);background:white;color:var(--muted);cursor:pointer}.quiz-nav-dot.current{border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal);color:var(--teal-dark);font-weight:750}.quiz-nav-dot.answered{background:var(--teal-pale);color:var(--teal-dark)}.feedback{padding:15px;margin:15px 0;border:1px solid var(--line);border-radius:11px;background:#fff}.feedback.correct{background:#f0f8f1;border-color:#bedac8}.feedback.incorrect{background:#fff5f2;border-color:#e8c5be}.source-block{padding:12px 14px;margin-top:10px;border-left:3px solid #82aaa2;background:#f5f7f2;border-radius:0 8px 8px 0}.source-block h3{font-size:.84rem;color:var(--teal-dark)}.source-block p{white-space:pre-wrap;margin-bottom:0;font-size:.9rem}.correct-key{display:flex;flex-wrap:wrap;gap:5px}.review-item{padding:16px 0;border-top:1px solid #e7ebe5}.review-item:first-child{border-top:0}.review-item h3{font-size:1rem}.login-wrap{min-height:100vh;display:grid;place-items:center;padding:22px}.login-card{width:min(430px,100%);padding:clamp(22px,5vw,37px)}.login-card .brand{padding:0;margin-bottom:31px}.login-card h1{font-size:1.75rem}.skeleton{border-radius:7px;height:15px;background:linear-gradient(90deg,#ebeee8 25%,#f5f6f2 45%,#ebeee8 65%);background-size:300% 100%;animation:shimmer 1.3s infinite}@keyframes shimmer{to{background-position:-150% 0}}@media (max-width:900px){.app-layout{grid-template-columns:1fr}.sidebar{display:none}.topbar{display:flex;position:sticky;top:0;z-index:10}.mobile-nav{display:flex;gap:5px;max-width:64vw;overflow-x:auto;scrollbar-width:thin}.mobile-nav .nav-link{min-height:38px;white-space:nowrap;padding:7px 10px;font-size:.83rem}.main-content{padding:27px clamp(16px,4vw,32px)}}@media (max-width:680px){body{font-size:14px}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.stat-card{padding:15px}.dashboard-columns{grid-template-columns:1fr}.page-heading{align-items:flex-start;flex-direction:column;gap:10px}.question-row{grid-template-columns:42px minmax(0,1fr);gap:9px}.question-row>.badge,.question-row>.row-action{grid-column:2;justify-self:start}.toolbar{align-items:stretch}.toolbar .field{flex:1 1 100%;min-width:100%}.quiz-top{align-items:flex-start}.answer-option{grid-template-columns:20px 28px 1fr auto;padding:10px}.main-content{padding:22px 14px 34px}}