:root{--fg:#1a1a1a;--muted:#6b7280;--border:#e5e7eb;--accent:#2563eb;--accent-hover:#1d4ed8;--correct:#16a34a;--wrong:#dc2626;--bg:#f9fafb;--card-bg:#fff}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic UI,Segoe UI,sans-serif;line-height:1.6}.page{max-width:680px;margin:0 auto;padding:2rem 1.25rem 4rem}.page.center{flex-direction:column;justify-content:center;align-items:center;gap:1.5rem;min-height:80vh;display:flex}h1{margin-bottom:1.5rem;font-size:1.75rem;font-weight:700}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:12px;flex-direction:column;gap:1rem;padding:1.25rem;display:flex}label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem;font-weight:600}.btn-group{gap:.5rem;display:flex}.btn-group.wrap{flex-wrap:wrap}.btn-group button{border:1px solid var(--border);cursor:pointer;font:inherit;color:var(--fg);background:#fff;border-radius:6px;padding:.4rem 1rem;font-size:.9rem;transition:all .1s}.btn-group button:hover{border-color:var(--accent);color:var(--accent)}.btn-group button.active{background:var(--accent);color:#fff;border-color:var(--accent)}.mode-btns{gap:1rem;margin-top:1.5rem;display:flex}button.primary{background:var(--accent);color:#fff;border:2px solid var(--accent);font:inherit;cursor:pointer;border-radius:10px;flex-direction:column;flex:1;align-items:center;gap:.2rem;padding:.85rem 1.25rem;font-size:1rem;font-weight:600;transition:background .1s;display:flex}button.primary span{opacity:.85;font-size:.78rem;font-weight:400}button.primary:hover{background:var(--accent-hover);border-color:var(--accent-hover)}button.primary.outline{color:var(--accent);background:#fff}button.primary.outline:hover{background:#eff6ff}.progress-bar{background:var(--border);border-radius:2px;height:4px;margin-bottom:1rem;overflow:hidden}.progress-bar div{background:var(--accent);border-radius:2px;height:100%;transition:width .3s}.meta{color:var(--muted);justify-content:space-between;margin-bottom:1rem;font-size:.85rem;display:flex}.timer{font-variant-numeric:tabular-nums}.timer.urgent{color:var(--wrong);font-weight:600}.question-text{white-space:pre-wrap;font-size:2.07rem;line-height:2}.question-reading{white-space:normal;font-size:1.5rem;line-height:1.9}.question-reading-q{font-size:1.75rem;line-height:1.8}.passage-para{margin-bottom:1em}.passage-para:last-child{margin-bottom:0}.passage-group-label{color:var(--accent);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.75rem;font-size:.8rem;font-weight:600}.question-word-usage{text-align:center;gap:.5rem;padding:1.5rem}.word-usage-label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.85rem}.word-usage-target{font-size:2.8rem;font-weight:700;line-height:1.4}.options{flex-direction:column;gap:.6rem;margin:1rem 0;display:flex}.option{border:1.5px solid var(--border);font:inherit;text-align:left;cursor:pointer;background:#fff;border-radius:10px;align-items:flex-start;gap:.75rem;padding:.75rem 1rem;font-size:1.89rem;line-height:1.6;transition:border-color .1s,background .1s;display:flex}.option:hover{border-color:var(--accent)}.option.selected{border-color:var(--accent);background:#eff6ff}.option.correct{border-color:var(--correct);background:#f0fdf4}.option.wrong{border-color:var(--wrong);background:#fef2f2}.option-key{min-width:1.25rem;color:var(--muted);font-weight:700}.option.correct .option-key{color:var(--correct)}.option.wrong .option-key{color:var(--wrong)}.feedback{border-radius:8px;margin-bottom:1rem;padding:.75rem 1rem;font-weight:500}.feedback.correct{color:var(--correct);background:#f0fdf4}.feedback.wrong{color:var(--wrong);background:#fef2f2}.next-btn{flex-direction:row;justify-content:center;width:100%}.exam-nav{gap:1rem;margin-top:1rem;display:flex}.exam-nav button:first-child{border:1.5px solid var(--border);font:inherit;cursor:pointer;background:#fff;border-radius:10px;padding:.75rem 1.5rem}.exam-nav button:first-child:disabled{opacity:.4;cursor:default}.results-card{align-items:center;gap:.5rem;min-width:280px}.results-grade{color:var(--muted);font-size:1.1rem;font-weight:500}.results-score{font-size:3rem;font-weight:700}.results-pct{color:var(--muted);font-size:1.25rem}.results-meta{color:var(--muted);margin-top:.5rem;font-size:.85rem}.error{color:var(--wrong)}.muted{color:var(--muted);font-size:.9rem}.session-picker{gap:.6rem;margin-top:1rem}.session-btn{border:1.5px solid var(--border);font:inherit;cursor:pointer;background:#fff;border-radius:10px;justify-content:space-between;align-items:center;padding:.75rem 1rem;transition:border-color .1s;display:flex}.session-btn:hover{border-color:var(--accent)}.session-btn.active{border-color:var(--accent);background:#eff6ff}.session-label{font-weight:500}.session-count{color:var(--muted);font-size:.85rem}.q-blank{border-bottom:3px solid var(--fg);vertical-align:bottom;min-width:3.5rem;height:.15em;margin:0 .25rem;display:inline-block;position:relative;top:-.15em}.feedback-notes{opacity:.9;margin-top:.5rem;font-size:.9rem;font-weight:400;line-height:1.6}.q-underline{text-underline-offset:4px;text-decoration:underline}.question-type-label{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.25rem;font-size:.8rem;font-weight:600}.meta-btn{font:inherit;color:var(--muted);cursor:pointer;text-underline-offset:3px;background:0 0;border:none;padding:0;font-size:.85rem;text-decoration:underline}.meta-btn:hover{color:var(--accent)}.exam-actions{gap:.75rem;margin-top:.25rem;display:flex}.flag-btn{border:1.5px solid var(--border);font:inherit;cursor:pointer;color:var(--muted);background:#fff;border-radius:8px;flex:1;padding:.55rem 1rem;font-size:.9rem;transition:all .1s}.flag-btn:hover{color:#d97706;border-color:#d97706}.flag-btn.flagged{color:#d97706;background:#fffbeb;border-color:#d97706}.exit-btn{border:1.5px solid var(--border);font:inherit;cursor:pointer;color:var(--muted);background:#fff;border-radius:8px;padding:.55rem 1rem;font-size:.9rem;transition:all .1s}.exit-btn:hover{border-color:var(--wrong);color:var(--wrong)}.nav-overlay{z-index:100;background:#00000073;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.nav-panel{background:#fff;border-radius:16px 16px 0 0;flex-direction:column;gap:1rem;width:100%;max-width:680px;max-height:70vh;padding:1.25rem;display:flex;overflow-y:auto}.nav-panel-header{justify-content:space-between;align-items:center;font-size:1rem;font-weight:600;display:flex}.nav-panel-header button{font:inherit;cursor:pointer;color:var(--muted);background:0 0;border:none;border-radius:6px;padding:.25rem .5rem;font-size:1.1rem}.nav-panel-header button:hover{background:var(--bg);color:var(--fg)}.nav-grid{grid-template-columns:repeat(auto-fill,minmax(2.6rem,1fr));gap:.4rem;display:grid}.nav-num{aspect-ratio:1;border:1.5px solid var(--border);font:inherit;cursor:pointer;color:var(--fg);background:#fff;border-radius:6px;font-size:.8rem;transition:all .1s}.nav-num:hover{border-color:var(--accent)}.nav-num.answered{color:#1e40af;background:#dbeafe;border-color:#93c5fd}.nav-num.flagged{color:#92400e;background:#fef3c7;border-color:#fcd34d}.nav-num.current{outline:2px solid var(--accent);outline-offset:1px;font-weight:700}.nav-legend{color:var(--muted);align-items:center;gap:1rem;font-size:.8rem;display:flex}.flagged-section{width:100%;max-width:680px;margin-top:2rem}.flagged-section h2{color:var(--fg);margin-bottom:1rem;font-size:1.1rem;font-weight:600}.flagged-item{border:1px solid var(--border);background:#fff;border-radius:12px;flex-direction:column;gap:.75rem;margin-bottom:1rem;padding:1.25rem;display:flex}.flagged-item-num{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.8rem;font-weight:600}.flagged-options{flex-direction:column;gap:.4rem;display:flex}.flagged-option{border:1.5px solid var(--border);border-radius:8px;align-items:flex-start;gap:.75rem;padding:.5rem .75rem;font-size:1.5rem;line-height:1.5;display:flex}.flagged-option.correct{border-color:var(--correct);background:#f0fdf4}.flagged-option.wrong{border-color:var(--wrong);background:#fef2f2}.flagged-option .option-key{min-width:1.25rem;color:var(--muted);font-weight:700}.flagged-option.correct .option-key{color:var(--correct)}.flagged-option.wrong .option-key{color:var(--wrong)}.flagged-notes{color:var(--muted);border-top:1px solid var(--border);padding-top:.75rem;font-size:.9rem;line-height:1.6}
