:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f4f6f8;--card:#fff;--line:#d9e0e7;--text:#1f2937;--muted:#667085;--brand:#2563eb;--ok:#15803d;--bad:#b42318;--warn:#b45309;--touch-min:44px}html{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;text-size-adjust:100%;scrollbar-gutter:stable}@supports not (scrollbar-gutter:stable){html{overflow-y:scroll}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);padding-bottom:max(24px, env(safe-area-inset-bottom,0px));padding-left:max(20px, env(safe-area-inset-left,0px));padding-right:max(20px, env(safe-area-inset-right,0px));padding-top:max(20px, env(safe-area-inset-top,0px));margin:0;font-family:Segoe UI,Microsoft JhengHei,sans-serif;overflow-x:clip}a{color:var(--brand);text-decoration:none}h2,h3{margin:0}button,select,input[type=number],input[type=text]{border:1px solid var(--line);font:inherit;touch-action:manipulation;background:#fff;border-radius:10px;padding:9px 12px}button{min-height:var(--touch-min)}button:disabled{cursor:not-allowed;opacity:.55}button:hover:not(:disabled){filter:brightness(.98)}button.primary{background:var(--brand);border-color:var(--brand);color:#fff}select{min-height:var(--touch-min)}input[type=radio]{accent-color:var(--brand);height:1.15rem;min-height:unset;width:1.15rem;margin-right:10px}.button-link{background:var(--brand);border:1px solid var(--brand);color:#fff;min-height:var(--touch-min);touch-action:manipulation;border-radius:10px;justify-content:center;align-items:center;padding:9px 12px;display:inline-flex}.wrap{max-width:1120px;margin:auto}.app-nav{background:var(--card);border:1px solid var(--line);border-radius:14px;flex-wrap:wrap;align-items:center;gap:12px;margin-bottom:12px;padding:12px 16px;display:flex;box-shadow:0 4px 14px #0f172a0d}.app-nav-brand{font-size:17px;font-weight:700}.app-nav-links{flex-wrap:wrap;flex:1;justify-content:flex-end;gap:8px;display:flex}.nav-link{color:var(--text);border-radius:10px;justify-content:center;align-items:center;padding:8px 14px;font-weight:500;display:inline-flex}.nav-link:hover{background:#f1f5f9}.nav-link-active{background:var(--brand);color:#fff}.nav-link-active:hover{background:var(--brand);filter:brightness(1.05)}.app-nav-user{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.app-nav-username{color:var(--muted);font-size:14px}button.nav-logout{border-color:var(--line);color:var(--text);background:0 0;min-height:40px;padding:8px 14px;font-size:14px}.visually-hidden{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.login-page{box-sizing:border-box;max-width:440px;min-height:min(100dvh - 40px,720px);padding-bottom:max(20px, env(safe-area-inset-bottom,0px));padding-top:max(12px, env(safe-area-inset-top,0px));flex-direction:column;justify-content:center;width:100%;margin-left:auto;margin-right:auto;display:flex}.login-page-inner{flex-direction:column;gap:18px;width:100%;display:flex}.login-hero{text-align:center;padding:0 2px}.login-brand{color:var(--brand);letter-spacing:.04em;text-transform:uppercase;margin:0 0 6px;font-size:13px;font-weight:700}.login-heading{letter-spacing:-.02em;margin:0 0 10px;font-size:clamp(1.5rem,5vw,1.75rem);font-weight:700;line-height:1.2}.login-hint{color:var(--muted);margin:0;font-size:15px;line-height:1.45}.login-form{flex-direction:column;gap:18px;display:flex}.login-form .field-label{flex-direction:column;gap:8px;display:flex}.login-form .field-label-text{font-size:14px;font-weight:600}.login-card select,.login-password-input{appearance:none;min-height:var(--touch-min);touch-action:manipulation;width:100%;font-size:16px;line-height:1.35}.login-card select{cursor:pointer;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23667085' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-position:right 14px center;background-repeat:no-repeat;padding-right:42px}.login-password-wrap{align-items:stretch;gap:8px;display:flex}.login-password-input{flex:1;min-width:0}.login-password-toggle{border:1px solid var(--line);color:var(--text);min-height:var(--touch-min);touch-action:manipulation;background:#f8fafc;border-radius:10px;flex:none;min-width:64px;padding:0 14px;font-size:15px;font-weight:600}.login-password-toggle:hover:not(:disabled){background:#f1f5f9}.login-password-toggle:disabled{opacity:.55}.login-error{color:var(--bad);background:#fef3f2;border:1px solid #fecdca;border-radius:10px;margin:0;padding:10px 12px;font-size:14px;line-height:1.4}.login-submit{min-height:calc(var(--touch-min) + 2px);width:100%;margin-top:2px;font-size:17px;font-weight:600}.page-links{margin:0}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-top:16px;padding:18px;box-shadow:0 8px 24px #0f172a0f}.card.login-card{max-width:none;margin-top:0;padding:clamp(18px,4vw,22px)}.toolbar,.section-head,.quiz-actions,.summary,.filters{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.section-head{justify-content:space-between}.section-body{margin-top:12px}.question-card{overflow-wrap:anywhere;word-break:break-word;font-size:17px;line-height:1.6}.question-title{margin-bottom:6px;font-weight:700}.choice{min-height:var(--touch-min);touch-action:manipulation;border-radius:10px;align-items:flex-start;gap:4px;margin:8px 0;padding:10px 12px;display:flex}.choice:has(input:checked){background:#eff6ff;border:1px solid #bfdbfe}#timer{color:#b00;margin-left:auto;font-size:24px;font-weight:700}.stat-grid{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px;margin:12px 0;display:grid}.stat-card{border:1px solid var(--line);background:#f8fafc;border-radius:12px;padding:12px}.stat-card strong{margin-top:4px;font-size:24px;display:block}.wrong-list{margin:8px 0 0;padding-left:18px}.wrong-list li{margin:6px 0}.wrong-solution-wrap{margin-top:8px}.solution-details{border:1px solid var(--line);background:#f8fafc;border-radius:10px;margin-top:10px;padding:8px 12px}.solution-summary{cursor:pointer;-webkit-user-select:none;user-select:none;font-weight:600;list-style:none}.solution-summary::-webkit-details-marker{display:none}.solution-body{color:#1e293b;margin-top:8px;font-size:15px;line-height:1.55}.solution-body p{margin:0 0 8px}.solution-body p:last-child{margin-bottom:0}.question-answer-stats{margin-bottom:10px}.history-attempt{border:1px solid var(--line);background:#fff;border-radius:14px;margin:12px 0;overflow:hidden}.attempt-head{cursor:pointer;text-align:left;background:#fff;border:0;border-radius:0;width:100%;padding:14px}.attempt-head:hover{background:#f8fafc}.attempt-body{border-top:1px solid var(--line);padding:14px}.empty-state{border:1px dashed var(--line);color:var(--muted);text-align:center;background:#f8fafc;border-radius:12px;padding:18px}.meta{color:var(--muted);font-size:14px}.pill{color:#3730a3;background:#eef2ff;border-radius:999px;padding:4px 10px;font-size:13px;display:inline-block}.pill.correct{color:var(--ok);background:#dcfce7}.pill.wrong{color:var(--bad);background:#fee2e2}.pill.unanswered{color:var(--warn);background:#fef3c7}.filter-btn{border:1px solid var(--line);font:inherit;min-height:var(--touch-min);touch-action:manipulation;background:#fff;border-radius:10px;padding:8px 14px}.filter-btn.active{color:#fff;background:#111827}.result-row{border:1px solid var(--line);background:#fff;border-radius:12px;margin:10px 0;padding:12px}.result-row.correct{border-left:5px solid var(--ok)}.result-row.wrong{border-left:5px solid var(--bad)}.result-row.unanswered{border-left:5px solid var(--warn)}.options{margin:8px 0 0;padding-left:0;list-style:none}.options li{border-radius:8px;min-height:36px;margin:3px 0;padding:8px 10px}.options .chosen{background:#fff7ed}.options .right{background:#ecfdf3}.history-box{background:#f7f7f7;margin-top:16px;padding:10px}.history-picker{flex-wrap:wrap;align-items:flex-end;gap:12px;margin-bottom:16px;display:flex}.history-picker-label{flex-direction:column;flex:220px;gap:6px;font-weight:600;display:flex}.history-picker-label select{width:100%;max-width:100%}.history-stepper{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.history-stepper-pos{text-align:center;min-width:4.5rem}.history-detail-single{margin-top:8px}.error{color:var(--bad)}@media (width<=760px){body{padding-bottom:max(16px, env(safe-area-inset-bottom,0px));padding-left:max(12px, env(safe-area-inset-left,0px));padding-right:max(12px, env(safe-area-inset-right,0px));padding-top:max(12px, env(safe-area-inset-top,0px))}.card{padding:14px}.app-nav{top:env(safe-area-inset-top,0px);z-index:100;flex-direction:column;align-items:stretch;gap:10px;padding:10px 12px;position:sticky}.app-nav-links{overscroll-behavior-x:contain;scrollbar-width:none;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;justify-content:flex-start;gap:6px;padding-bottom:4px;overflow-x:auto}.app-nav-links::-webkit-scrollbar{display:none}.nav-link{min-height:var(--touch-min);white-space:nowrap;border:1px solid #0000;flex:none;justify-content:center;padding:10px 14px}.nav-link-active{border-color:#2563eb59}.login-page{max-width:100%;min-height:calc(100dvh - max(28px, env(safe-area-inset-top,0px) + env(safe-area-inset-bottom,0px)));padding-bottom:max(12px, env(safe-area-inset-bottom,0px))}.login-page-inner{gap:16px}.card.login-card{border-radius:16px;padding:16px}.page-links{font-size:15px;line-height:1.5}.toolbar,.section-head{flex-direction:column;align-items:stretch}.section-head .toolbar{flex-direction:column}.toolbar h2{font-size:1.15rem}.quiz-actions{grid-template-columns:1fr 1fr;gap:10px;width:100%;display:grid}.quiz-actions button:last-child:nth-child(odd){grid-column:1/-1}#timer{text-align:center;width:100%;margin-left:0;font-size:22px}.question-card{font-size:16px}input[type=number],select{width:100%;max-width:100%;font-size:16px}.stat-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stat-card strong{font-size:20px}.attempt-head{min-height:var(--touch-min);padding:16px 14px}.filters{gap:8px}.history-picker{flex-direction:column;align-items:stretch}.history-stepper{justify-content:space-between}.result-row{padding:14px}}@media (hover:none) and (pointer:coarse){button:active:not(:disabled),.filter-btn:active{filter:brightness(.94)}.nav-link:active{background:#e2e8f0}.nav-link-active:active{filter:brightness(.95)}.attempt-head:active{background:#f1f5f9}}