:root{font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:#22373e;background:#f5f7f8;font-synthesis:none;--ink:#19343d;--muted:#718087;--line:#e6ebed;--accent:#ed8955;--green:#287568;--sidebar:#142d36}
*{box-sizing:border-box}body{margin:0}button,a,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.42}button{color:inherit}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible{outline:3px solid #dd763c;outline-offset:4px}button{border:0;background:none}h1,h2,h3,p{margin:0}h1{font-size:28px;line-height:1.45;letter-spacing:-.8px}h2{font-size:19px;line-height:1.5}h3{font-size:17px}p{line-height:1.7}.icon{width:22px;height:22px;flex:none;vertical-align:middle}.skip-link{position:fixed;top:-80px;z-index:99;background:white;padding:12px}.skip-link:focus{top:0}.sidebar{position:fixed;inset:0 auto 0 0;width:238px;background:var(--sidebar);color:#c3d0d4;padding:36px 22px;display:flex;flex-direction:column;z-index:20}.brand{display:flex;gap:11px;align-items:center;padding:0 8px;color:white}.brand-mark{width:39px;height:41px;display:grid;place-items:center;background:#f7a771;color:#19343d;border-radius:12px}.brand-mark .icon{width:26px;height:26px}.brand-title{font-size:17px;font-weight:750;line-height:1.55;letter-spacing:.4px}.brand-sub{font-size:11px;letter-spacing:2px;color:#91a7af;margin-top:4px}.nav-label{font-size:12px;letter-spacing:1.5px;color:#7e99a3;margin:43px 14px 14px}.side-nav{display:grid;gap:7px}.nav-link{display:flex;align-items:center;gap:12px;border-radius:9px;padding:14px;font-size:14px;position:relative}.nav-link:hover{background:#ffffff0a;color:white}.nav-link.active{background:#2a444c;color:#fff}.nav-link.active:before{content:"";width:3px;height:20px;border-radius:3px;background:#f6a36e;position:absolute;left:0}.nav-count{margin-left:auto;font-size:12px;background:#ffffff10;border-radius:5px;padding:1px 7px}.sidebar-bottom{margin-top:auto;border-top:1px solid #ffffff12;padding:22px 9px 0;font-size:12px;line-height:1.9;color:#95aab2}.sidebar-bottom .icon{width:16px;margin-right:5px}.workspace{margin-left:238px}.topbar{height:80px;background:#fff;border-bottom:1px solid var(--line);padding:0 44px;display:flex;align-items:center;justify-content:space-between;font-size:14px}.breadcrumb{display:flex;align-items:center;gap:12px;color:#819097}.breadcrumb b{font-weight:500;color:#243b44}.breadcrumb .icon{width:13px}.profile{display:flex;gap:11px;align-items:center}.avatar{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:#e8efed;color:#476d64;font-size:13px}.profile small{color:#7d8b90}.main{max-width:1230px;margin:auto;padding:36px 44px 32px}.page-heading{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:26px}.eyebrow{color:#779097;font-size:12px;letter-spacing:2px;font-weight:650;margin-bottom:7px}.subtitle{font-size:14px;color:var(--muted);margin-top:8px}.demo-badge{display:flex;align-items:center;gap:7px;white-space:nowrap;padding:8px 12px;border:1px solid #e3e8e9;border-radius:7px;font-size:12px;color:#667980;background:#fff}.demo-badge .icon{width:15px;height:15px}.feature{border-radius:15px;background:#e9efed;display:flex;align-items:center;justify-content:space-between;padding:27px 30px;gap:24px;position:relative;overflow:hidden;border:1px solid #e2e9e5}.feature h2{font-size:23px;font-weight:650;letter-spacing:-.6px}.feature p{font-size:14px;color:#627870;margin:7px 0 20px}.pill{font-size:11px;background:#dae6df;padding:5px 9px;border-radius:5px;color:#507160;display:inline-block;margin-bottom:13px;letter-spacing:1px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:43px;padding:11px 18px;border-radius:8px;font-size:14px;font-weight:600;border:1px solid transparent}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover{background:#2c4c57}.btn-light{background:white;border-color:#dce4e6}.btn-light:hover{background:#f2f5f5}.btn-accent{background:#f6a36e;color:#213740}.btn .icon{width:18px;height:18px}.feature-info{display:flex;align-items:center;gap:18px}.feature-info span{font-size:12px;color:#6b8278}.progress-ring{width:140px;height:140px;flex:none;border-radius:50%;background:conic-gradient(#527567 var(--progress,0%),#d8e2dc 0);padding:9px;margin:0 22px;transform:rotate(-.001deg)}.ring-inner{height:100%;border-radius:50%;background:#e9efed;display:flex;flex-direction:column;align-items:center;justify-content:center}.ring-inner strong{font-size:33px;font-weight:600;line-height:1.4}.ring-inner strong small{font-size:18px}.ring-inner>span{font-size:12px;color:#718578}.stats{display:grid;grid-template-columns:repeat(4,1fr);margin:22px 0 30px;background:white;border:1px solid var(--line);border-radius:12px;padding:22px 0}.stat{padding:0 24px;border-right:1px solid var(--line)}.stat:last-child{border:0}.stat-top{display:flex;align-items:center;gap:7px;color:#819097;font-size:12px}.stat-top .icon{width:16px;height:16px}.stat strong{display:inline-block;font-size:27px;line-height:1.3;margin-top:9px;font-weight:600;letter-spacing:-.6px}.stat small{font-size:12px;color:#8a969c;margin-left:6px}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:0 0 16px;gap:12px}.section-heading>span{font-size:12px;color:#839199}.mode-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.mode-card{text-align:left;padding:22px;background:white;border:1px solid var(--line);border-radius:12px;transition:transform .15s,border-color .15s}.mode-card:hover{transform:translateY(-3px);border-color:#b7cac8}.mode-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.mode-icon{background:#edf2f4;color:#577985;width:42px;height:42px;border-radius:11px;display:grid;place-items:center}.mode-tag{font-size:11px;color:#8c9a9f}.mode-card:nth-child(2) .mode-icon{background:#f0ecf7;color:#82709a}.mode-card:nth-child(3) .mode-icon{background:#e9f3f0;color:#458d7a}.mode-card:nth-child(4) .mode-icon{background:#fff0e9;color:#c58261}.mode-card:nth-child(5) .mode-icon{background:#faf4e5;color:#b7994c}.mode-card:nth-child(6) .mode-icon{background:#edf0fa;color:#7585ad}.mode-card p{font-size:12px;color:#819097;margin-top:7px}.mode-bottom{display:flex;align-items:center;justify-content:space-between;font-size:12px;color:#6a818b;margin-top:21px}.mode-bottom 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solid var(--line);border-radius:14px;padding:28px}.quiz-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:20px;font-size:13px}.chip{display:inline-block;border-radius:5px;background:#edf3f1;color:#5a7b70;padding:5px 9px;font-size:12px}.favorite{color:#8b969b;padding:8px;border:1px solid #e5e9eb;border-radius:7px;display:flex;gap:6px;align-items:center;font-size:12px;min-height:40px}.favorite.selected{color:#af7929;background:#fff7e6;border-color:#efdab0}.favorite.selected svg{fill:#fbe5ae}.question-title{font-size:21px;font-weight:600;line-height:1.8;margin-bottom:24px;overflow-wrap:anywhere}.options{display:grid;gap:12px}.option{display:flex;align-items:center;gap:13px;text-align:left;line-height:1.65;padding:15px 16px;border:1px solid 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p{font-size:12px;color:var(--muted);margin-top:7px}.text-btn{font-size:13px;color:#7b8b92;padding:10px;white-space:nowrap}.text-btn:hover{color:#b65f39}.category-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.category-card{padding:24px;text-align:left;border:1px solid var(--line);background:white;border-radius:12px}.category-card h3{margin:16px 0 8px}.category-card p{font-size:13px;color:var(--muted);margin-bottom:18px}.category-card:hover{border-color:#9bb5b0}.exam-intro{max-width:670px;margin:auto;text-align:center;padding:42px}.exam-intro>.mode-icon{margin:0 auto 20px;width:56px;height:56px}.exam-intro h2{font-size:25px}.exam-facts{display:grid;grid-template-columns:repeat(3,1fr);margin:30px 0}.exam-facts strong{display:block;font-size:28px;margin-bottom:5px}.exam-facts small{color:var(--muted);font-size:13px}.exam-rules{text-align:left;background:#f5f7f7;padding:18px 23px;border-radius:9px;font-size:14px;color:#65787f;line-height:1.9;margin-bottom:25px}.result-score{font-size:64px;color:#466e61;font-weight:650;line-height:1.3;margin:20px 0}.result-score small{font-size:18px}.result-review{margin-top:24px}.result-review summary{cursor:pointer;font-size:14px;line-height:1.8}.result-review details{text-align:left;border-top:1px solid var(--line);padding:16px 0}.result-review p{font-size:13px;color:var(--muted);margin-top:8px}.storage-warning{background:#fff0dc;color:#925e23;padding:12px 18px;margin-bottom:20px;border-radius:8px;font-size:14px}dialog{border:1px solid var(--line);border-radius:14px;padding:28px;max-width:430px;width:calc(100% - 36px);color:var(--ink)}dialog::backdrop{background:#142d3670}dialog p{font-size:14px;color:var(--muted);margin:15px 0 25px}dialog .dialog-buttons{display:flex;justify-content:flex-end;gap:10px}#toast{position:fixed;bottom:30px;left:calc(50% + 119px);transform:translateX(-50%);background:#19343df0;color:white;border-radius:10px;padding:12px 20px;font-size:14px;z-index:90;box-shadow:0 6px 20px #142d361a;opacity:0;pointer-events:none;transition:opacity .2s;max-width:85%;text-align:center}#toast.show{opacity:1}
@media(min-width:1500px){.main{padding-top:45px}.mode-card{padding:26px}.mode-card p{font-size:14px}.topic-row{padding:18px}.feature{padding:30px 34px}}
@media(max-width:1150px){.sidebar{width:207px;padding:30px 16px}.workspace{margin-left:207px}.topbar{padding:0 28px}.main{padding:28px}.mode-card{padding:18px}.quiz-layout{grid-template-columns:minmax(0,1fr) 205px}.quiz-panel{padding:23px}#toast{left:calc(50% + 103px)}.progress-ring{margin-right:0}.stat{padding:0 18px}}
@media(max-width:900px){.sidebar{width:185px;padding:25px 12px}.brand{gap:8px}.brand-title{font-size:14px}.brand-mark{width:33px;height:37px}.brand-sub{font-size:10px;letter-spacing:1px}.workspace{margin-left:185px}.main{padding:25px 22px}.topbar{padding:0 22px}.profile small{display:none}.mode-grid{grid-template-columns:repeat(2,1fr)}.topic-grid{grid-template-columns:repeat(2,1fr)}.stat{padding:0 12px}.stat-top{gap:5px}.stat-top .icon{display:none}.feature{padding:24px}.feature h2{font-size:21px}.progress-ring{width:112px;height:112px}.ring-inner strong{font-size:27px}.feature-info span{display:none}.quiz-layout{grid-template-columns:1fr}.quiz-aside{display:grid;grid-template-columns:1fr 1fr;gap:15px}.answer-grid{grid-template-columns:repeat(5,1fr)}#toast{left:calc(50% + 92px)}}
@media(max-width:640px){.sidebar{display:none}.workspace{margin-left:0}.topbar{height:65px;padding:0 20px}.breadcrumb>span,.breadcrumb>.icon{display:none}.breadcrumb b{font-size:15px;font-weight:650}.profile{font-size:12px;gap:8px}.avatar{width:29px;height:29px}.main{padding:25px 18px 98px}.page-heading{margin-bottom:22px;gap:10px}h1{font-size:25px}.eyebrow{font-size:10px;letter-spacing:1.6px}.subtitle{font-size:13px;max-width:240px}.demo-badge{padding:6px 8px;font-size:11px;align-self:flex-start;margin-top:8px}.demo-badge .icon{display:none}.feature{padding:22px 20px;border-radius:13px;gap:10px}.feature h2{font-size:19px}.feature p{font-size:12px;max-width:185px;margin-bottom:17px}.feature .btn{font-size:13px;padding:10px 13px;min-height:40px}.pill{font-size:10px;margin-bottom:10px}.progress-ring{width:93px;height:93px;padding:7px}.ring-inner strong{font-size:24px}.ring-inner strong small{font-size:13px}.ring-inner>span{font-size:10px}.stats{margin:16px 0 27px;padding:18px 0}.stat{padding:0 8px;text-align:center}.stat-top{justify-content:center;font-size:11px}.stat strong{font-size:23px;margin-top:8px}.stat small{font-size:10px;margin-left:3px}.section-heading h2{font-size:18px}.section-heading>span{font-size:11px}.mode-grid{gap:12px}.mode-card{padding:17px 16px}.mode-top{margin-bottom:15px}.mode-icon{width:36px;height:36px;border-radius:9px}.mode-icon .icon{width:20px}.mode-card h3{font-size:16px}.mode-card p{font-size:11px;line-height:1.7;margin-top:6px}.mode-bottom{margin-top:17px;font-size:11px}.mode-tag{font-size:10px}.topics-section{margin-top:26px}.topic-grid{gap:9px}.topic-row{padding:13px 11px;gap:8px}.topic-mark{width:28px;height:30px;font-size:12px}.topic-row b{font-size:12px}.topic-row small{font-size:10px}.topic-row>.icon{width:12px}.footer{font-size:10px;margin-top:25px}.mobile-nav{display:flex;position:fixed;bottom:0;left:0;right:0;border-top:1px solid #e5e9eb;background:#fffffff5;padding:10px 12px calc(9px + env(safe-area-inset-bottom));justify-content:space-around;z-index:30;backdrop-filter:blur(12px)}.mobile-nav a{display:flex;flex-direction:column;align-items:center;gap:5px;font-size:10px;color:#8a989e;min-width:55px}.mobile-nav .icon{width:21px;height:21px}.mobile-nav a.active{color:#2d574c}.quiz-panel{padding:21px 17px}.question-title{font-size:18px;line-height:1.85}.quiz-meta{margin-bottom:19px}.option{font-size:14px;padding:14px 12px;gap:10px}.letter{width:26px;height:26px}.quiz-actions{gap:8px;margin-top:23px}.quiz-actions .btn{padding:11px;font-size:13px}.quiz-aside{grid-template-columns:1fr}.quiz-aside .panel{margin:0}.answer-grid{grid-template-columns:repeat(10,1fr);gap:5px}.number-btn{min-height:30px;font-size:11px}.answer-panel{padding:17px}.category-cards{gap:12px}.category-card{padding:20px 15px}.category-card h3{font-size:16px}.category-card p{font-size:12px}.collection-item{padding:16px;gap:7px;align-items:flex-start}.collection-main h3{font-size:14px}.collection-item .text-btn{padding:7px;font-size:11px}.exam-intro{padding:30px 20px}.exam-intro h2{font-size:22px}.exam-rules{padding:16px;font-size:13px}.exam-facts strong{font-size:24px}.exam-facts small{font-size:12px}.exam-intro>.btn{width:100%}#toast{left:50%;bottom:85px}.result-score{font-size:55px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
/* Keep the primary action readable on especially narrow phones. */
@media(max-width:380px){.page-heading>.demo-badge{display:none}.page-heading h1{font-size:24px}.feature .progress-ring{display:none}.feature p{max-width:none}.feature h2{font-size:19px}.feature-info .btn{white-space:nowrap}.mode-card{padding:16px 12px}.mode-card p{font-size:12px}.stat strong{font-size:21px}.answer-grid{grid-template-columns:repeat(5,1fr)}}

/* Interview training extends the existing palette and quiz surface. */
.question-instruction{font-size:14px;color:#647b83;margin:-8px 0 17px;line-height:1.8}
.multi-marker{border-radius:4px}.multi-marker .icon{width:17px;height:17px}
.boolean-options{grid-template-columns:repeat(2,minmax(0,1fr))}
.boolean-options .option{justify-content:center;min-height:64px}
.open-question-hint{background:#f3f6f5;border:1px solid var(--line);padding:20px;border-radius:10px;font-size:16px;line-height:1.85}
.open-question-hint .muted{margin-top:10px}.number-btn.reviewed{background:#e8edf3;color:#536c7e}
.answer-analysis{margin-top:28px;display:grid;gap:14px;text-align:left;overflow-wrap:anywhere}
.analysis-section{border:1px solid #e1e8e6;border-radius:10px;padding:20px 22px;background:#fff}
.analysis-section h3{font-size:15px;font-weight:700;color:#30594e;letter-spacing:.2px;margin:0 0 11px}
.analysis-section p,.result-review .analysis-section p{font-size:16px;line-height:1.9;color:#425c60;margin:0;white-space:pre-line}
.analysis-section p+p{margin-top:9px}
.analysis-section ul,.analysis-section ol{margin:0;padding-left:22px;font-size:15px;line-height:1.85;color:#4b6469}
.analysis-section li+li{margin-top:8px}
.answer-outcome{background:#eff7f3;border-color:#cde2d8}
.answer-outcome .outcome-title{font-weight:650;color:#286449}
.answer-outcome.incorrect{background:#fff5ee;border-color:#efd8c8}
.answer-outcome.incorrect h3,.answer-outcome.incorrect .outcome-title{color:#a6603e}
.core-conclusion{background:#f4f7f6;border-left:3px solid #6b9284}
.core-conclusion p{font-weight:600;color:#274c42}
.diagnostic-steps ol{list-style:none;counter-reset:step;padding-left:0}
.diagnostic-steps li{counter-increment:step;position:relative;padding-left:34px}
.diagnostic-steps li:before{content:counter(step);position:absolute;left:0;top:2px;display:grid;place-items:center;width:23px;height:23px;font-size:12px;border-radius:6px;background:#e7eeeb;color:#4d7366}
.diagnostic-steps li+li{margin-top:13px}
.interview-script{background:#f3f6fa;border-color:#dfe7ee}
.interview-script h3{color:#4e6981}
.result-review .answer-analysis{margin:18px 0 0}.result-review .analysis-section h3{margin-bottom:10px}
@media(max-width:640px){.analysis-section{padding:18px 16px}.analysis-section p,.result-review .analysis-section p{font-size:16px;line-height:1.9}.quiz-meta>span{min-width:0}.analysis-section ul,.analysis-section ol{font-size:15px}.question-instruction{font-size:14px}.boolean-options{gap:10px}.answer-analysis{gap:12px}}

/* V0.3: learning insights, composable practice filters and local imports. */
.quiz-panel,.collection-main,.option>span,.filtered-preview li>span{min-width:0}
.question-title,.option,.collection-main,.filtered-preview,.result-review summary,.storage-warning,#import-file-status{overflow-wrap:anywhere}
.sidebar{overflow-y:auto}.text-link{font-size:14px;color:#356e5f;text-decoration:underline;text-underline-offset:4px}
.home-learning{padding:22px;background:#edf3f0;border:1px solid #dfe9e3;border-radius:12px;margin:0 0 28px}
.home-learning>p{color:#536e63;font-size:14px}.weak-heading{margin:18px 0 10px}
.home-learning .weak-grid{grid-template-columns:1fr}.home-learning .weak-card{padding:14px 17px}.home-learning .weak-card p{margin:5px 0}
.weak-empty{font-size:14px;line-height:1.8;color:#758780;padding:13px 0}
.weak-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.weak-card{padding:20px;border:1px solid #eadbc9;border-radius:10px;background:#fff8ed;overflow-wrap:anywhere}
.weak-card strong{font-size:16px}.weak-card p{font-size:14px;color:#80684e;margin:9px 0}.weak-card span{font-size:13px;color:#91724f}
.learning-section{margin-top:30px}.learning-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.learning-metric{padding:21px 24px;background:white;border:1px solid var(--line);border-radius:11px;min-width:0}
.learning-metric>span{font-size:14px;color:#76858a}.learning-metric strong{display:block;font-size:29px;margin-top:10px;font-weight:600}
.learning-metric small{font-size:13px;font-weight:400;margin-left:7px;color:#8a999e}.today-metrics{grid-template-columns:repeat(4,minmax(0,1fr))}
.stats-note{font-size:14px;line-height:1.85;color:#76858b;margin:14px 0 18px}
.mastery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.mastery-card{padding:23px;border:1px solid var(--line);border-radius:12px;background:white;min-width:0}
.mastery-card .section-heading h3{font-size:16px}.mastery-status{white-space:nowrap;font-size:12px;padding:5px 9px;background:#edf1f3;color:#70818a;border-radius:6px}
.mastery-status.is-weak{background:#fff0de;color:#a56d30}.mastery-status.is-good{background:#e9f4ed;color:#3b7b57}
.mastery-card dl{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:20px 0}.mastery-card dt{font-size:12px;color:#829097}.mastery-card dd{font-size:22px;font-weight:600;margin:8px 0 0}
.mastery-rate{display:flex;justify-content:space-between;font-size:13px;color:#74898d}.mastery-rate strong{color:#385f54}
.filter-panel{display:flex;align-items:flex-end;gap:15px;flex-wrap:wrap;background:white;border:1px solid var(--line);border-radius:12px;padding:24px}
.filter-panel label{font-size:14px;display:grid;gap:9px;flex:1;min-width:145px}
select{font:inherit;color:var(--ink);border:1px solid #dce5e4;border-radius:7px;padding:11px 30px 11px 12px;max-width:100%;background:#fff;min-height:44px}
select:focus-visible,textarea:focus-visible,input:focus-visible{outline:3px solid #d58253;outline-offset:3px}
.filter-panel>a{padding:12px 0}.filter-result{margin:22px 0 30px}.filter-empty{padding:30px 20px}
.filtered-preview{list-style:none;padding:0;margin:17px 0;display:grid;gap:8px}.filtered-preview li{display:flex;align-items:flex-start;gap:12px;font-size:14px;line-height:1.8;padding:15px;background:#fff;border:1px solid var(--line);border-radius:8px}.filtered-preview .chip{white-space:nowrap;flex-shrink:0}
.import-panel>p,.import-help>p{font-size:15px;color:#687e85;margin:12px 0;line-height:1.85}
.import-links{display:flex;flex-wrap:wrap;gap:20px;margin:20px 0 26px}.file-label,.json-label{font-size:14px;font-weight:600;display:block;margin-bottom:10px}
input[type=file]{display:block;width:100%;font-size:14px;padding:12px 0;white-space:normal}input::file-selector-button{font:inherit;padding:9px 12px;border-radius:7px;border:1px solid #d6e1de;background:#f2f6f4;color:#36584d;margin-right:12px;cursor:pointer}
.json-label{margin-top:24px}#import-json{display:block;width:100%;resize:vertical;min-height:190px;max-height:600px;padding:15px;border:1px solid #dce5e4;border-radius:9px;font-size:14px;font-family:Consolas,monospace;line-height:1.65;color:#35525c;background:#f9fbfa;margin-bottom:18px}
.import-feedback:not(:empty){margin-top:22px;padding:20px;border-radius:10px;overflow-wrap:anywhere;line-height:1.8;font-size:14px}
.import-feedback h3{font-size:16px;margin-bottom:10px}.has-errors{background:#fff1e9;color:#995d40;border:1px solid #ecd6c7}.is-success{background:#eaf5ee;color:#356449;border:1px solid #cfe3d4}.import-feedback ul{max-height:320px;overflow:auto;padding-left:23px}
.import-help{margin-top:22px}.category-reference{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:20px 0;font-size:13px;color:#5e747d}.category-reference code{display:block;font-size:12px;color:#90a09c;margin-top:4px}
.question-pagination,.list-pagination{display:flex;align-items:center;justify-content:center;gap:16px;margin:17px 0;font-size:13px;color:#71848a}.question-pagination{gap:6px}.question-pagination .text-btn{padding:7px}
@media(max-width:1000px){.weak-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.today-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.mastery-card{padding:20px 17px}.mastery-card .section-heading{flex-wrap:wrap}.category-reference{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:640px){.learning-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.learning-metric{padding:17px}.learning-metric strong{font-size:26px}.learning-metric>span{font-size:13px}.mastery-grid{grid-template-columns:1fr;gap:13px}.mastery-card{padding:20px}.weak-grid{grid-template-columns:1fr}.weak-card{padding:18px}.home-learning{padding:18px}.home-learning h2{font-size:17px}.home-learning .text-link{font-size:12px}.filter-panel{padding:18px;gap:13px}.filter-panel label{flex-basis:100%;min-width:0}.filter-panel button{flex:1}.filtered-preview li{flex-direction:column;gap:7px}.import-panel{padding:22px 17px}.import-panel .section-heading{align-items:flex-start;flex-direction:column}.category-reference{grid-template-columns:repeat(2,minmax(0,1fr))}.learning-section>.section-heading{flex-wrap:wrap}.home-learning+.section-heading{margin-top:20px}.mobile-nav a{min-width:48px}.import-help{padding:22px 18px}}
.exam-result{max-width:960px;margin:auto}.exam-result-head{text-align:center}.exam-result-head h2{margin-top:17px}
.exam-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;margin:26px 0}.exam-metrics>div{padding:18px 12px;border:1px solid var(--line);border-radius:9px;text-align:center;background:#f8faf9;min-width:0}.exam-metrics strong{display:block;font-size:23px;overflow-wrap:anywhere}.exam-metrics span{display:block;color:var(--muted);font-size:12px;margin-top:5px}
.exam-breakdown{margin:26px 0}.exam-breakdown h3{margin-bottom:13px}.exam-breakdown-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}.exam-breakdown-grid>div{min-width:0;padding:12px 14px;border:1px solid var(--line);border-radius:8px;display:grid;gap:4px;overflow-wrap:anywhere}.exam-breakdown-grid span{font-size:12px;color:#6b8084}.exam-breakdown-grid strong{font-size:17px;color:#335d52}.exam-breakdown-grid small{font-size:11px;color:#809198}.result-actions{margin:28px 0}.exam-result .result-review{margin-top:22px}
@media(max-width:640px){.exam-result{padding:20px 16px}.exam-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-breakdown-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.exam-breakdown-grid>div{padding:11px}.exam-metrics strong{font-size:20px}.exam-result .result-review summary{overflow-wrap:anywhere}}

/* V0.5: separate tablet and phone navigation without changing desktop sidebar. */
.exam-mobile-status{display:none}
.mobile-more-menu[hidden],.app-update[hidden]{display:none!important}
.mobile-more{color:inherit}
.mobile-more-menu{position:absolute;right:12px;z-index:35;width:min(230px,calc(100vw - 24px));display:grid;gap:4px;padding:9px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 12px 32px #142d3633}
.mobile-more-menu a{display:flex;align-items:center;gap:10px;min-height:48px;padding:10px 13px;border-radius:8px;color:var(--ink);font-size:14px}
.mobile-more-menu a.active,.mobile-more-menu a:hover{background:#edf3f0;color:#215b4d}
.mobile-more-menu .icon{width:20px;height:20px}
.app-update{position:fixed;right:16px;bottom:16px;z-index:100;background:#19343d;color:#fff;border-radius:10px;padding:12px 15px;box-shadow:0 7px 25px #142d3633;font-size:14px}
.app-update button{color:#f6b180;text-decoration:underline;margin-left:8px;min-height:36px}
.main,.quiz-panel,.panel,.feature>div,.collection-item,.analysis-section{min-width:0}
.main{overflow-wrap:anywhere}
.option,.analysis-section,.result-review summary,.exam-rules,.category-card,.mastery-card{overflow-wrap:anywhere}
.analysis-section p,.analysis-section ul,.analysis-section ol{max-width:72ch}
.result-review summary{min-height:44px;display:list-item;align-content:center}
.number-btn{min-height:38px}
.favorite{min-height:44px}
.text-btn{min-height:44px}
.quiz-actions .btn{min-height:46px}
dialog{max-height:calc(100dvh - 32px);overflow-y:auto}
dialog .btn{min-height:46px}
@media(max-width:900px){
  .sidebar{display:none}.workspace{margin-left:0}
  .mobile-nav{display:flex;position:fixed;left:0;right:0;top:0;bottom:auto;z-index:30;align-items:stretch;justify-content:space-around;background:#fffffff5;border-bottom:1px solid var(--line);padding:env(safe-area-inset-top) max(14px,env(safe-area-inset-right)) 0 max(14px,env(safe-area-inset-left));min-height:calc(62px + env(safe-area-inset-top));box-shadow:0 2px 14px #142d360d;backdrop-filter:blur(12px)}
  .mobile-nav>a,.mobile-more{display:flex;flex:1;min-width:0;min-height:60px;align-items:center;justify-content:center;gap:7px;color:#71848a;font-size:13px;border-radius:8px}
  .mobile-nav>a.active,.mobile-more.active{color:#225c4e;background:#edf3f0;font-weight:650}
  .mobile-nav .icon{width:20px;height:20px}
  .mobile-more-menu{top:calc(100% + 6px);bottom:auto}
  .topbar{margin-top:calc(62px + env(safe-area-inset-top));padding:0 max(28px,env(safe-area-inset-right)) 0 max(28px,env(safe-area-inset-left))}
  .main{max-width:820px;padding:30px max(28px,env(safe-area-inset-right)) 48px max(28px,env(safe-area-inset-left))}
  #toast{left:50%}
  .mode-grid,.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .exam-mobile-status{display:flex;position:sticky;top:calc(62px + env(safe-area-inset-top));z-index:12;align-items:center;justify-content:space-between;margin:-6px 0 16px;padding:11px 17px;border:1px solid #d8e6df;border-radius:11px;background:#f0f7f3f5;box-shadow:0 5px 16px #142d3610;font-size:15px;line-height:1.25;font-weight:650}
  .exam-mobile-status small{font-size:12px;color:#617f75;font-weight:400}
  .exam-mobile-status strong{font-size:21px;font-variant-numeric:tabular-nums;color:#275b4b}
  .aside-timer{display:none}
  .quiz-aside{grid-template-columns:1fr 1fr}
  .answer-grid{grid-template-columns:repeat(5,minmax(0,1fr))}
  .number-btn{min-height:44px;font-size:13px}
}
@media(max-width:640px){
  .mobile-nav{top:auto;bottom:0;min-height:0;padding:5px max(6px,env(safe-area-inset-right)) calc(5px + env(safe-area-inset-bottom)) max(6px,env(safe-area-inset-left));border-bottom:0;border-top:1px solid var(--line);box-shadow:0 -3px 17px #142d3610}
  .mobile-nav>a,.mobile-more{flex-direction:column;gap:3px;min-width:0;min-height:54px;padding:5px 0;font-size:10px;line-height:1.2;white-space:nowrap;background:transparent!important}
  .mobile-nav>a.active,.mobile-more.active{position:relative}
  .mobile-nav>a.active:before,.mobile-more.active:before{content:"";position:absolute;top:0;left:32%;right:32%;height:3px;border-radius:0 0 3px 3px;background:#ed8955}
  .mobile-nav .icon{width:21px;height:21px}
  .mobile-more-menu{top:auto;bottom:calc(100% + 8px)}
  .topbar{height:calc(65px + env(safe-area-inset-top));margin-top:0;padding-top:env(safe-area-inset-top);padding-left:max(18px,env(safe-area-inset-left));padding-right:max(18px,env(safe-area-inset-right))}
  .main{padding:24px max(16px,env(safe-area-inset-right)) calc(105px + env(safe-area-inset-bottom)) max(16px,env(safe-area-inset-left))}
  .exam-mobile-status{top:env(safe-area-inset-top);margin:-3px 0 14px;padding:10px 13px}
  .exam-mobile-status strong{font-size:20px}
  .quiz-aside{grid-template-columns:1fr}
  .answer-grid{grid-template-columns:repeat(5,minmax(0,1fr));max-height:236px;gap:8px;overflow-y:auto;overscroll-behavior:contain}
  .number-btn{min-height:44px;font-size:13px}
  .question-title{font-size:19px;line-height:1.65;letter-spacing:0}
  .option{min-height:62px;padding:15px 13px;font-size:15px;line-height:1.6}
  .letter{width:30px;height:30px}
  .quiz-meta{flex-wrap:wrap}
  .favorite{min-height:44px;font-size:13px}
  .quiz-actions [data-action="finish-exam"]{order:3;flex-basis:100%;margin-top:9px;background:#fff;color:#294951;border-color:#bacbc9}
  .quiz-actions [data-action="previous"],.quiz-actions [data-action="next"]{flex-basis:calc(50% - 5px)}
  .analysis-section{padding:17px 16px}
  .analysis-section p,.result-review .analysis-section p{font-size:15px;line-height:1.8}
  .answer-analysis{gap:11px}
  .app-update{left:12px;right:12px;bottom:calc(74px + env(safe-area-inset-bottom))}
  #toast{bottom:calc(77px + env(safe-area-inset-bottom))}
  dialog{width:calc(100% - 24px);padding:22px 18px;max-height:calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom))}
}
@media(max-width:500px){
  .stats{grid-template-columns:repeat(2,minmax(0,1fr));padding:0}
  .stat{padding:13px 8px}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .collection-item{flex-wrap:wrap}.collection-main{flex-basis:100%}
}
@media(max-width:375px){
  .mobile-nav>a,.mobile-more{font-size:9px}
  .category-cards{grid-template-columns:1fr}
  .feature-info .btn{white-space:normal}
}