:root{color-scheme:light;--ink:#1c2a2d;--muted:#687678;--faint:#e3e9e8;--bg:#f6f8f8;--green:#11685b;--green-dark:#0d5349;--tint:#e9f3ef;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:100%}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;touch-action:manipulation}button:disabled{opacity:.35;cursor:not-allowed}a{color:var(--green)}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #3d9f92;outline-offset:3px}.icon{display:inline-flex;width:19px;height:19px;flex-shrink:0;vertical-align:middle}.icon svg{width:100%;height:100%;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round}.skip{position:fixed;left:16px;top:-80px;background:#fff;padding:12px;z-index:99}.skip:focus{top:8px}
.sidebar{position:fixed;inset:0 auto 0 0;width:256px;border-right:1px solid var(--faint);background:#fbfcfc;display:flex;flex-direction:column;z-index:10}.brand{display:flex;gap:13px;align-items:center;padding:29px 25px 24px;text-decoration:none;color:var(--ink);font-size:1.1875rem;font-weight:700;line-height:1.3;letter-spacing:-.4px}.brand-mark{background:var(--green);color:#fff;height:39px;width:39px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:2.0rem;font-weight:600;letter-spacing:-3px;line-height:1;padding-right:3px}.brand-mark span{color:#ade4c8}.brand-sub{display:block;font-size:0.75rem;letter-spacing:1.6px;color:var(--muted);font-weight:500;margin-top:3px}.nav-scroll{overflow-y:auto;flex:1;padding:0 15px 20px;scrollbar-width:thin;scrollbar-color:#d3dfda transparent}.nav-primary{display:grid;gap:4px}.nav-button{display:flex;gap:10px;width:100%;align-items:center;text-align:left;border:0;background:transparent;padding:10px 12px;min-height:44px;border-radius:8px;font-size:0.875rem;line-height:1.5;color:#526164}.nav-button:hover{background:#edf1f0}.nav-button[aria-current=true]{background:var(--tint);color:var(--green-dark);font-weight:600}.nav-button .count{margin-left:auto;font-size:0.75rem;color:#7a8889;font-weight:400}.nav-button[aria-current=true] .count{color:var(--green)}.nav-label{margin:27px 12px 10px;color:#71807e;font-size:0.75rem;letter-spacing:1px;display:flex;justify-content:space-between}.chapter-button{align-items:flex-start;padding-top:9px;padding-bottom:9px}.chapter-number{font-size:0.75rem;color:#93a29f;width:18px;flex-shrink:0;line-height:22px}.chapter-name{flex:1}.sidebar-foot{border-top:1px solid var(--faint);padding:20px 26px}.foot-label{display:flex;justify-content:space-between;font-size:0.75rem;color:var(--muted)}progress{appearance:none;width:100%;height:5px;border:none;border-radius:8px;overflow:hidden;background:#e6ece9}progress::-webkit-progress-bar{background:#e6ece9}progress::-webkit-progress-value{background:var(--green);border-radius:8px}progress::-moz-progress-bar{background:var(--green)}.source-button{border:0;background:transparent;width:100%;padding:13px 0 0;text-align:left;font-size:0.75rem;color:var(--muted);display:flex;justify-content:space-between}
.page{margin-left:256px}.topbar{min-height:72px;padding:10px 40px;border-bottom:1px solid var(--faint);background:#ffffffd9;display:flex;justify-content:space-between;align-items:center;gap:12px;font-size:0.875rem}.top-left{display:flex;align-items:center;gap:13px}.top-title{font-weight:550}.top-divider{color:#c2cdca}.top-sub{color:var(--muted)}.save-indicator{display:flex;align-items:center;gap:7px;color:#7a8886;font-size:0.75rem}.save-indicator .icon{width:15px;height:15px}main{max-width:1360px;margin:0 auto;padding:34px 40px 36px}.work-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:25px}.eyebrow{font-size:0.75rem;letter-spacing:1.8px;color:var(--green);font-weight:650;margin-bottom:4px}h1{font-size:1.8125rem;font-weight:650;letter-spacing:-.8px;margin:0;line-height:1.45}.view-description{font-size:0.875rem;color:var(--muted);margin:6px 0 0}.mode-switch{display:flex;gap:4px;padding:4px;border:1px solid #dce4e1;border-radius:10px;background:#eef2f0;flex-shrink:0}.mode-switch button{border:0;background:transparent;border-radius:6px;padding:7px 14px;min-height:36px;display:flex;align-items:center;gap:7px;color:var(--muted);font-size:0.875rem}.mode-switch button[aria-pressed=true]{background:#fff;color:var(--green-dark);box-shadow:0 1px 4px #263d3310}.mode-switch .icon{width:16px;height:16px}
.search-row{display:flex;gap:10px}.search-box{display:flex;align-items:center;gap:11px;flex:1;min-width:0;border:1px solid #dce4e1;background:#fff;border-radius:9px;min-height:48px;padding:0 14px;color:#8a9894}.search-box:focus-within{border-color:#4f9a88;box-shadow:0 0 0 3px #11685b0a}.search-box input{border:0;outline:0;background:transparent;min-width:0;flex:1;color:var(--ink);height:46px;font-size:1.0rem}.search-box input:focus-visible{outline:0}.search-box input::placeholder{color:#83918e}kbd{display:inline-block;padding:0 5px;border:1px solid #dce3e1;border-radius:4px;background:#fff;font-size:0.75rem;line-height:20px;color:#829086;font-family:inherit;min-width:20px;text-align:center}.button{border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;border-radius:8px;padding:10px 17px;line-height:1.4;font-size:0.875rem;font-weight:550}.button.primary{background:var(--green);color:#fff}.button.primary:hover{background:var(--green-dark)}.button.secondary{background:#fff;border-color:#dce4e1;color:#4e625b}.button.secondary:hover{background:#f0f5f2}.filter-row{display:flex;align-items:center;justify-content:space-between;margin:18px 0 23px;gap:10px}.filter-tabs{display:flex;gap:6px;flex-wrap:wrap}.filter-tabs button{background:transparent;border:1px solid transparent;border-radius:6px;padding:6px 10px;min-height:36px;font-size:0.875rem;color:#75817c}.filter-tabs button[aria-pressed=true]{background:#e5ece8;color:#35574a}.filter-tabs button:hover{color:var(--green)}
.learning-grid{display:grid;grid-template-columns:minmax(0,1fr) 234px;gap:30px;align-items:start}.study-column{min-width:0}.study-card{background:#fff;border:1px solid #dde5e1;border-radius:14px;box-shadow:0 4px 22px #24372b04;overflow:hidden}.card-track{height:3px;background:#f0f4f1}.card-track div{height:100%;background:var(--green);transition:width .25s}.card-meta{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:23px 28px 16px}.card-counter{font-size:0.75rem;letter-spacing:.5px;color:#8a9690;font-variant-numeric:tabular-nums}.card-counter strong{color:var(--green);font-size:1.0rem;margin-right:3px}.card-tools{display:flex;align-items:center;gap:6px}.status-tag{font-size:0.75rem;line-height:24px;padding:1px 8px;border-radius:5px;background:#f1f4f2;color:#7a8780}.status-tag.mastered{background:#e9f5ed;color:#267447}.status-tag.review{background:#fbf0e6;color:#a16834}.status-tag.learning{background:#ecf1fb;color:#5777a4}.icon-button{border:0;background:transparent;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;min-width:40px;min-height:40px;color:#819087;font-size:1.5625rem;line-height:1}.icon-button:hover{background:#f0f4f1}.icon-button[aria-pressed=true]{color:#ba8031;background:#fcf5e8}.icon-button[aria-pressed=true] svg{fill:#e9bc623b}.question-body{padding:2px 30px 26px}.category-line{font-size:0.75rem;color:var(--green);display:flex;gap:7px;align-items:center;flex-wrap:wrap;margin-bottom:13px}.category-line .pill{border:1px solid #dcebe3;padding:1px 6px;border-radius:4px;font-size:0.75rem}.question-title{font-size:1.5rem;line-height:1.65;font-weight:620;letter-spacing:-.35px;margin:0;overflow-wrap:anywhere}.question-title:focus{outline:none}.question-source{font-size:0.75rem;color:#89988e;margin-top:12px;display:flex;gap:9px;flex-wrap:wrap}.recall-space{padding:43px 20px 36px;text-align:center;color:#8b9990}.recall-symbol{color:#91afa1;width:40px;height:40px;display:block;margin:0 auto 11px}.recall-symbol svg{width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.2}.recall-space p{font-size:1.0rem;color:#687c70;margin:0 0 5px}.recall-space small{font-size:0.75rem}.reveal-actions{padding:0 30px 26px}.reveal-button{width:100%;min-height:48px;font-size:1.0rem}.reveal-button kbd{border-color:#ffffff35;background:#ffffff15;color:#d6e9e3;margin-left:8px}.card-bottom{padding:13px 23px;border-top:1px solid #edf1ef;display:flex;align-items:center;justify-content:space-between;background:#fcfdfc;gap:8px}.nav-card-button{font-size:0.875rem;display:flex;align-items:center;gap:6px;padding:7px 4px;min-height:36px;background:transparent;border:0;color:#667e70}.nav-card-button .icon{width:16px;height:16px}.card-bottom .tiny{font-size:0.75rem;color:#87958b}
.answer-block{padding:0 30px 28px;animation:appear .16s ease}.answer-divider{display:flex;align-items:center;gap:10px;margin-bottom:17px;font-size:0.75rem;color:#739282}.answer-divider:after{content:"";height:1px;background:#e6ede8;flex:1}.answer-brief{font-size:1.125rem;line-height:1.9;margin:0 0 21px;font-weight:550;color:#26473b;overflow-wrap:anywhere}.answer-points{padding:0;margin:0 0 22px;list-style:none}.answer-points li{display:flex;gap:12px;margin:12px 0;font-size:1.0rem;line-height:1.9;overflow-wrap:anywhere}.point-num{margin-top:3px;flex-shrink:0;width:23px;height:23px;display:flex;align-items:center;justify-content:center;border-radius:6px;background:#eef4f0;color:#59816b;font-size:0.75rem}.trap{font-size:0.875rem;background:#f7f8f3;border:1px solid #e9ecdf;border-left:3px solid #b7bb87;border-radius:6px;padding:14px 16px;line-height:1.9}.trap strong{display:block;font-size:0.75rem;color:#757b4a;margin-bottom:4px;letter-spacing:.7px}.code{background:#172b24;color:#dae8de;white-space:pre-wrap;overflow-wrap:anywhere;padding:18px;border-radius:8px;font-size:0.8125rem;line-height:1.8;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;margin:22px 0}.source-links{display:flex;align-items:center;gap:8px 12px;flex-wrap:wrap;font-size:0.75rem;margin:20px 0;color:#7f9284}.source-links a{text-decoration:none;border-bottom:1px solid #cadcd2;font-size:0.75rem}.source-links a:hover{border-color:var(--green)}details{border-top:1px solid #e5ece7;margin-top:18px;padding-top:12px}summary{cursor:pointer;padding:6px 0;font-size:0.875rem;color:#597969;min-height:36px}.source-copy{white-space:pre-wrap;overflow-wrap:anywhere;font-size:1.0rem;line-height:1.9;color:#415049;margin:16px 0}.source-note{font-size:0.8125rem;line-height:1.8;color:#728376;background:#f4f6f4;padding:12px 14px;border-radius:6px}.source-section-title{font-size:0.875rem;color:#4f7160;margin:22px 0 10px}.rating-bar{position:sticky;bottom:12px;z-index:3;display:flex;gap:9px;margin-top:14px;padding:10px;background:#fffffffa;border:1px solid #dde5e0;border-radius:11px;box-shadow:0 5px 25px #1936250c}.rating-bar button{flex:1;border:1px solid #dfe7e1;background:#fff;border-radius:7px;min-height:47px;display:flex;align-items:center;justify-content:center;gap:8px;font-size:0.875rem;padding:8px 5px}.rating-bar button:last-child{background:var(--green);border-color:var(--green);color:#fff}.rating-bar button:first-child{color:#996042;background:#fcfaf7}.rating-bar button:nth-child(2){color:#5a7393;background:#f8fafc}.rating-bar button:last-child kbd{background:#ffffff15;border-color:#ffffff40;color:#cbe5d5}.keyboard-note{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:5px;margin:20px 0 0;color:#829084;font-size:0.75rem}.keyboard-note>span{margin:0 4px}.local-note{text-align:center;font-size:0.75rem;color:#7d8c83;margin:11px 0 0}
.question-rail{position:sticky;top:26px;min-width:0}.rail-heading{display:flex;justify-content:space-between;align-items:center;font-size:0.875rem;color:#56685e;padding:1px 3px 15px;border-bottom:1px solid #e0e7e2}.rail-heading span:last-child{font-size:0.75rem;color:#88978c}.question-list{max-height:calc(100vh - 400px);min-height:190px;overflow-y:auto;margin-top:10px;scrollbar-width:thin;scrollbar-color:#d4ded7 transparent}.question-item{display:flex;gap:10px;width:100%;background:transparent;border:0;padding:10px 10px 10px 4px;font-size:0.875rem;text-align:left;line-height:1.8;align-items:flex-start;color:#718175;border-radius:7px;margin:2px 0}.question-item:hover{background:#eaf0eb}.question-item[aria-current=true]{background:#e7f0e9;color:#286144}.question-item .item-num{font-size:0.75rem;color:#87998b;flex-shrink:0;min-width:20px;margin-top:2px;font-variant-numeric:tabular-nums}.question-item .item-title{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.question-item .done-icon{color:#38976a;margin-left:auto;font-size:0.875rem;flex-shrink:0}.rail-tip{margin-top:22px;padding:16px 2px;border-top:1px solid #e0e7e2;display:flex;align-items:flex-start;gap:10px;color:#7e9182}.rail-tip .icon{width:17px;height:17px;margin-top:3px}.rail-tip p{margin:0;font-size:0.75rem;line-height:1.9}.text-button{background:transparent;border:0;color:var(--green);padding:8px 0;font-size:0.875rem;min-height:36px}.mobile-only,.mobile-list{display:none}.loading-state,.empty-state{padding:60px 25px;background:#fff;border:1px solid #dfe6e1;border-radius:14px;text-align:center}.loading-state p,.empty-state p{color:var(--muted);font-size:1.0rem}.empty-state h2{font-size:1.375rem;margin:10px 0}.empty-icon{color:#6e9a7e;font-size:2.1875rem}.empty-state .button{margin:12px 4px}.empty-total{font-size:0.875rem;color:#6c8475;margin:18px 0}.spinner{display:inline-block;width:23px;height:23px;border:2px solid #dce9e0;border-top-color:var(--green);border-radius:50%;animation:spin .8s linear infinite}
.toast{position:fixed;bottom:22px;left:calc(50% + 110px);transform:translate(-50%,20px);background:#193e2d;color:#fff;border-radius:10px;padding:12px 16px;font-size:0.875rem;box-shadow:0 7px 30px #12332026;opacity:0;pointer-events:none;z-index:60;transition:.2s;display:flex;align-items:center;gap:18px;max-width:calc(100vw - 32px)}.toast.visible{opacity:1;pointer-events:auto;transform:translate(-50%,0)}.toast button{color:#bbe9c6;background:transparent;border:0;font-size:0.875rem;white-space:nowrap}dialog{border:1px solid #dce5dd;border-radius:16px;padding:0;max-width:620px;width:calc(100vw - 32px);max-height:85dvh;color:var(--ink);box-shadow:0 20px 90px #10251b24}dialog::backdrop{background:#142b225c;backdrop-filter:blur(3px)}.dialog-head{position:sticky;top:0;z-index:2;background:#fff;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 23px;border-bottom:1px solid #e3eae5}.dialog-head h2{font-size:1.125rem;font-weight:600;margin:0}.dialog-copy{padding:10px 26px 24px;font-size:1.0rem;line-height:1.95}.dialog-copy p{margin:15px 0}.dialog-scroll{padding:16px 20px 24px;max-height:calc(85dvh - 76px);overflow:auto}.dialog-scroll .question-item{font-size:1.0rem;padding:12px 10px}.dialog-scroll .question-item .item-title{display:block}.dialog-scroll .nav-label{font-size:0.8125rem}.dialog-scroll .nav-button{font-size:1.0rem;min-height:46px}.noscript{position:fixed;inset:100px 20px auto;background:#fff;padding:30px;z-index:80;border:1px solid #ddd}@keyframes appear{from{opacity:0;transform:translateY(3px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}
@media(min-width:1500px){main{padding-top:43px}.learning-grid{gap:40px;grid-template-columns:minmax(0,1fr) 260px}.question-title{font-size:1.6875rem}.question-body{padding:4px 38px 28px}.card-meta{padding:25px 36px 18px}.answer-block{padding-left:38px;padding-right:38px}.recall-space{padding:65px 20px 50px}}
@media(max-width:1180px){.sidebar{width:230px}.page{margin-left:230px}main{padding:28px 28px 35px}.topbar{padding:10px 28px}.learning-grid{grid-template-columns:minmax(0,1fr)}.question-rail{display:none}.mobile-list{display:inline-flex;white-space:nowrap}.question-title{font-size:1.5625rem}.recall-space{padding:42px 20px}.toast{left:calc(50% + 115px)}}
@media(max-width:820px){.sidebar{display:none}.page{margin-left:0}.mobile-only{display:inline-flex}.topbar{min-height:60px;padding:8px 17px}.top-left{gap:9px}.top-left>.icon-button{margin-left:-5px;min-width:32px;min-height:36px}.top-sub,.top-divider{display:none}.top-title{font-size:1.0rem}.save-indicator{font-size:0.75rem}.save-indicator .icon{width:14px;height:14px}main{padding:24px 18px 30px}.work-heading{gap:12px;align-items:flex-start;margin-bottom:21px}.eyebrow{font-size:0.75rem;letter-spacing:1.3px}h1{font-size:1.5625rem;line-height:1.6}.view-description{font-size:0.875rem;line-height:1.8;margin-top:2px;max-width:280px}.mode-switch{margin-top:16px;padding:3px;gap:2px}.mode-switch button{padding:6px 10px;min-height:36px;font-size:0.875rem}.mode-switch .icon{display:none}.search-box{min-height:46px;padding:0 12px;gap:8px}.search-box input{font-size:1.0rem}.search-box kbd{display:none}.random-button{width:46px;min-width:46px;padding:10px}.random-button span:not(.icon){display:none}.filter-row{margin:14px 0 18px;gap:4px;flex-wrap:wrap}.filter-tabs{gap:2px}.filter-tabs button{font-size:0.875rem;padding:6px 8px;min-height:40px}.mobile-list{font-size:0.875rem;padding:7px 0 7px 7px;gap:4px}.study-card{border-radius:12px}.card-meta{padding:17px 20px 14px}.question-body{padding:2px 21px 20px}.category-line{font-size:0.75rem;margin-bottom:12px;line-height:1.9}.question-title{font-size:1.3125rem;line-height:1.7;letter-spacing:-.15px}.question-source{font-size:0.75rem;margin-top:12px}.recall-space{padding:34px 14px 31px}.recall-space p{font-size:1.0rem}.recall-space small{font-size:0.75rem}.reveal-actions{padding:0 21px 21px}.reveal-button{min-height:48px}.reveal-button kbd{display:none}.card-bottom{padding:9px 17px}.card-bottom .tiny{font-size:0.75rem}.nav-card-button{font-size:0.875rem;min-height:40px}.answer-block{padding:0 21px 23px}.answer-brief{font-size:1.0625rem;line-height:1.9;margin-bottom:18px}.answer-points li{font-size:1.0rem;gap:9px;line-height:1.9}.point-num{font-size:0.75rem;width:21px;height:21px;margin-top:5px}.trap{font-size:0.875rem;padding:11px 13px}.rating-bar{bottom:max(10px,env(safe-area-inset-bottom));margin-top:12px;padding:7px;gap:6px;box-shadow:0 3px 22px #19362512}.rating-bar button{font-size:0.875rem;min-height:48px;gap:5px}.rating-bar kbd{display:none}.rating-bar .icon{width:16px;height:16px}.keyboard-note{display:none}.local-note{font-size:0.75rem;line-height:1.85;max-width:300px;margin:18px auto 0}.toast{left:50%;bottom:85px;font-size:0.875rem;white-space:normal;width:max-content}.source-copy{font-size:1.0rem}.dialog-head{padding:12px 17px}.dialog-copy{padding:8px 21px 20px}.question-list{max-height:none}.code{font-size:0.75rem;padding:13px}.empty-state{padding:37px 19px}.empty-state h2{font-size:1.3125rem}}
@media(max-width:370px){main{padding-left:12px;padding-right:12px}.filter-tabs button{padding:6px}.question-body,.answer-block{padding-left:17px;padding-right:17px}.mode-switch button{padding-left:8px;padding-right:8px}.category-line{gap:5px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.work-heading{flex-wrap:wrap}.work-heading>div:first-child{min-width:0}

.subject-switch{display:flex;gap:8px;margin:0 0 27px;padding-bottom:20px;border-bottom:1px solid var(--faint);flex-wrap:wrap}.subject-switch button{display:flex;align-items:center;gap:18px;background:transparent;border:1px solid transparent;border-radius:9px;padding:10px 15px;min-height:48px;line-height:1.5}.subject-switch button:hover{background:#eef3f0}.subject-switch button[aria-pressed=true]{background:var(--tint);border-color:#cfe2d8;color:var(--green)}.subject-name{font-size:1rem;font-weight:650}.subject-count{font-size:.75rem;color:var(--muted);font-variant-numeric:tabular-nums}.subject-switch button[aria-pressed=true] .subject-count{color:var(--green)}
.source-blocks{font-size:1rem;line-height:1.9;color:#415049;overflow-wrap:anywhere}.source-blocks>p{margin:14px 0}.source-blocks .source-section-title{font-size:1rem;line-height:1.8}.source-table-wrap{overflow-x:auto;max-width:100%;margin:18px 0;border:1px solid #dfe7e1;border-radius:7px;scrollbar-width:thin}.source-table-wrap:focus-visible{outline:3px solid #3d9f92;outline-offset:3px}.source-table{border-collapse:collapse;width:100%;min-width:370px;font-size:.875rem;line-height:1.8}.source-table td,.source-table th{padding:11px 13px;text-align:left;vertical-align:top;border-right:1px solid #e3eae5;border-bottom:1px solid #e3eae5;min-width:100px}.source-table th{font-weight:600;background:#edf4ef;color:#365b47}.source-table td:last-child,.source-table th:last-child{border-right:0}.source-table tr:last-child td{border-bottom:0}.source-code{white-space:pre;overflow-x:auto;overflow-wrap:normal;tab-size:4;font-size:.8125rem}
@media(max-width:820px){.subject-switch{margin-bottom:22px;padding-bottom:16px;gap:6px}.subject-switch button{flex:1;justify-content:space-between;padding:10px 12px;gap:10px}.subject-name{font-size:1rem}.source-table td,.source-table th{padding:9px 11px}.source-code{font-size:.8125rem}}

.plain-answer .answer-brief{font-size:1.125rem;line-height:1.95;font-weight:500}.example-box{border:1px solid #dce8e2;border-radius:10px;background:#f5f9f7;padding:19px 21px;margin:0 0 21px;overflow-wrap:anywhere}.example-box h3{font-size:.875rem;margin:0 0 10px;color:#2d6b51;font-weight:650}.example-box p{font-size:1rem;line-height:1.95;margin:0;color:#334d40}.memory-line{padding:0 0 4px;border-left:3px solid var(--green);padding-left:16px;margin:24px 0}.memory-line>span{display:block;font-size:.875rem;font-weight:650;color:var(--green);margin-bottom:5px}.memory-line p{font-size:1rem;line-height:1.9;margin:0;overflow-wrap:anywhere}.explain-steps{list-style:none;padding:0;margin:17px 0 0}.explain-steps li{display:flex;gap:12px;font-size:1rem;line-height:1.9;align-items:flex-start;margin:10px 0}.step-index{display:flex;align-items:center;justify-content:center;flex-shrink:0;background:#deede5;color:#2f6b4b;border-radius:50%;width:25px;height:25px;font-size:.875rem;margin-top:3px}.technical-notes summary{font-size:.875rem}.plain-answer>.answer-divider{font-size:.875rem}.plain-answer .source-links{margin-bottom:10px}
@media(max-width:820px){.plain-answer .answer-brief{font-size:1.0625rem}.example-box{padding:15px 16px}.explain-steps li{gap:9px}.memory-line{padding-left:13px}}

/* Job-linked study paths: amber makes priorities visible without relying on color alone. */
.clarity-notes{margin:0 0 24px;padding:1px 0 0}.clarity-notes h3{font-size:.875rem;color:#456857;margin:0 0 13px;font-weight:650}.clarity-notes dl{margin:0}.clarity-notes dl>div{margin:0 0 15px}.clarity-notes dt{font-size:.9375rem;line-height:1.8;font-weight:600;color:#2e453a;margin:0 0 4px}.clarity-notes dd{font-size:1rem;line-height:1.95;color:#41554a;margin:0;overflow-wrap:anywhere}
.job-banner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;padding:18px 22px;margin:-3px 0 27px;background:#fff9eb;border:1px solid #ecd8a9;border-radius:12px;color:#674714}.job-kicker{font-size:.75rem;letter-spacing:1px;font-weight:650}.job-banner p{margin:4px 0 0;font-size:.9375rem;line-height:1.8}.job-banner-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap}.job-primary{background:#76551d;color:#fff;border:1px solid #76551d}.job-primary:hover{background:#5f4316}.job-banner .text-button{color:#76551d}.job-banner.is-active .job-primary{background:#fffdf7;color:#674714;border-color:#cfb77e}.job-filters{padding:16px 18px;margin:-3px 0 21px;border:1px solid #e2e8e3;border-radius:11px;background:#fff}.job-filters[hidden]{display:none}.job-role-tabs{display:flex;gap:6px;flex-wrap:wrap}.job-role-tabs button{border:1px solid #dce4df;background:#fff;color:#63736b;border-radius:6px;font-size:.875rem;min-height:39px;padding:7px 13px}.job-role-tabs button[aria-pressed=true]{border-color:#c5a96c;color:#684913;background:#fff5df}.job-selects{display:flex;gap:22px;flex-wrap:wrap;margin-top:14px}.job-selects label{display:flex;gap:9px;align-items:center;font-size:.8125rem;color:#5f7067}.job-selects select{font:inherit;font-size:.875rem;color:#354e43;padding:7px 27px 7px 10px;border:1px solid #d9e2dc;border-radius:6px;background:#fff;min-height:39px;max-width:100%}.job-hint{color:#748278;font-size:.75rem;line-height:1.85;margin:12px 0 0}.job-topic{display:flex;align-items:center;flex-wrap:wrap;gap:12px;font-size:.875rem;line-height:1.8;margin-top:12px;color:#6b521e}.job-topic .text-button{font-size:.8125rem}.study-card.has-job-focus{border-color:#cfb67e;box-shadow:0 4px 24px #9c792007}.has-job-focus .card-track{background:#f6eddb}.has-job-focus .card-track div{background:#b18a3e}.job-card-note{margin-top:17px;border-left:3px solid #c7a056;background:#fffaf0;padding:12px 14px;border-radius:0 7px 7px 0}.job-badges{display:flex;gap:6px;flex-wrap:wrap}.job-badge{font-size:.75rem;line-height:1.7;padding:2px 7px;border-radius:4px;border:1px solid #e7d5ae;color:#73501d;background:#fffdf8;font-weight:500}.job-badge.core{background:#f8e6bb;border-color:#f0d496;color:#64430e}.job-badge.plus{background:#f1f2ed;border-color:#dce1d4;color:#576943}.job-card-note p{font-size:.75rem;color:#8a7450;line-height:1.85;margin:8px 0 0}.question-item .item-copy{min-width:0;flex:1}.question-item.job-item{border-left:2px solid #d2b479;padding-left:7px}.item-focus{display:block;font-size:.6875rem;color:#94713b;line-height:1.7;margin-top:3px}.job-map-dialog{max-width:1050px}.job-map-content{padding:10px 24px 28px}.coverage-intro{color:#637469;font-size:.875rem;line-height:1.95}.coverage-group{margin:24px 0}.coverage-group h3{font-size:1rem;color:#314e40;font-weight:600;margin:0 0 10px}.coverage-scroll{overflow:auto;border:1px solid #e1e6dc;border-radius:8px}.coverage-table{width:100%;min-width:610px;border-collapse:collapse;font-size:.8125rem;line-height:1.8}.coverage-table th,.coverage-table td{padding:13px 14px;text-align:left;vertical-align:top;border-bottom:1px solid #e4e8df;border-right:1px solid #e4e8df}.coverage-table th:last-child,.coverage-table td:last-child{border-right:0}.coverage-table tbody tr:last-child>*{border-bottom:0}.coverage-table thead th{background:#f3f5ee;color:#55644b;font-weight:600;white-space:nowrap}.coverage-table tbody th{font-weight:400;width:40%}.coverage-table td{width:20%}.coverage-table small{display:block;font-size:.75rem;color:#788375;font-weight:400;line-height:1.8;margin-top:5px}.coverage-topic,.coverage-link{background:transparent;border:0;color:#285d47;text-align:left;padding:2px 0;min-height:32px;line-height:1.8;font-size:.875rem}.coverage-topic{font-weight:550}.coverage-link{font-size:.8125rem}.coverage-status{display:block;color:#926f36;font-size:.75rem;margin:5px 0}.coverage-role{display:block;margin-bottom:7px;font-size:.75rem;color:#68756a}.coverage-role b{display:block;font-weight:500;color:#795826}.coverage-none{color:#9ca697}.job-role-tabs button:focus-visible,.job-selects select:focus-visible,.coverage-scroll:focus-visible,.coverage-topic:focus-visible,.coverage-link:focus-visible{outline:3px solid #548f80;outline-offset:3px}
@media(max-width:820px){.job-banner{padding:16px 17px;margin:0 0 23px;gap:12px}.job-banner p{font-size:.875rem}.job-banner-actions{gap:18px}.job-banner-actions .button{font-size:.875rem;padding:8px 13px;min-height:42px}.job-filters{padding:13px 14px;margin-bottom:19px}.job-role-tabs{gap:5px}.job-role-tabs button{font-size:.8125rem;padding:7px 10px;min-height:42px}.job-selects{gap:10px 15px}.job-selects label{flex:1;min-width:210px;justify-content:space-between}.job-selects select{min-width:145px;min-height:42px}.job-card-note{padding:11px 12px;margin-top:14px}.job-map-content{padding:8px 16px 20px}.coverage-table th,.coverage-table td{padding:11px}.coverage-topic,.coverage-link{min-height:42px}.item-focus{font-size:.75rem}}

/* Resume practice stays in its own subject, with evidence separated from suggested reasoning. */
.job-banner[hidden],.resume-banner[hidden]{display:none}
.resume-banner{margin:-3px 0 27px;padding:20px 22px;background:#edf5f2;border:1px solid #cbdfd7;border-radius:12px}
.resume-banner-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.resume-banner .job-kicker{color:#537766}.resume-banner h2{font-size:1.125rem;line-height:1.7;color:#285445;margin:4px 0 0}.resume-banner>p{font-size:.875rem;line-height:1.9;color:#5a7468;margin:12px 0 16px;max-width:850px}
.resume-scope{display:flex;gap:6px;flex-wrap:wrap}.resume-scope button{border:1px solid #bdd5ca;background:#fff;color:#3b6253;border-radius:7px;font-size:.875rem;min-height:42px;padding:8px 12px}.resume-scope button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:#fff}
.resume-chapters{display:flex;gap:7px;flex-wrap:wrap}.resume-chapters button{display:flex;align-items:center;gap:9px;padding:7px 10px;min-height:40px;font-size:.8125rem;border:1px solid #d5e3dc;border-radius:6px;background:#f9fcfa;color:#526d5f;text-align:left}.resume-chapters button span{font-size:.75rem;color:#758c7e}.resume-chapters button[aria-pressed=true]{border-color:#6d9b86;color:#205b40;background:#e1eee6}
.study-card.has-resume-focus{border-color:#a7c9bb}.has-resume-focus .card-track{background:#e3eee8}.has-resume-focus .pill{background:#e6f2ec;color:#2a6a4d;border-color:#cadecf}.question-item.resume-item{border-left:2px solid #8caf9b;padding-left:7px}.item-focus.resume-label{color:#527c64;font-size:.75rem}
.resume-question-focus{margin:16px 0 0;padding:11px 14px;background:#f4f7f5;border-radius:7px;border-left:3px solid #a6c3b3}.resume-question-focus strong{font-size:.8125rem;font-weight:600;color:#567663}.resume-question-focus p{font-size:.875rem;line-height:1.9;color:#617166;margin:4px 0 0;overflow-wrap:anywhere}
.resume-facts{padding:16px 19px;border:1px solid #d1e4db;background:#f1f8f4;border-radius:9px;margin:0 0 25px}.resume-facts h3,.resume-followups h3,.resume-verify h3{font-size:.9375rem;line-height:1.8;color:#355f4c;margin:0 0 8px}.resume-facts p{font-size:1rem;line-height:1.9;color:#3d594a;margin:0;overflow-wrap:anywhere}.resume-answer .answer-brief{font-weight:550}
.resume-followups{margin:23px 0}.resume-followups details{margin-top:9px;padding-top:5px}.resume-followups summary{font-size:1rem;color:#365c4b;line-height:1.85;padding:9px 0}.resume-followups details p{font-size:1rem;line-height:1.9;color:#4c6054;margin:7px 0 16px;overflow-wrap:anywhere}.resume-verify{margin:24px 0;padding:16px 18px;border:1px dashed #d6c59e;background:#fffaf0;border-radius:9px}.resume-verify h3{color:#79613d}.resume-verify ul{padding-left:20px;margin:7px 0 0}.resume-verify li{font-size:.9375rem;line-height:1.95;color:#706149;margin:7px 0;overflow-wrap:anywhere}
.resume-related>div{display:grid;gap:7px;margin-top:9px}.related-card{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;background:#f7faf8;border:1px solid #dbe6df;border-radius:7px;color:#3d6954;text-align:left;font-size:.875rem;line-height:1.8;padding:11px 13px;min-height:44px;overflow-wrap:anywhere}.related-card:hover{background:#eaf3ed}.related-card>span:first-child{min-width:0}
.resume-scope button:focus-visible,.resume-chapters button:focus-visible,.related-card:focus-visible{outline:3px solid #548f80;outline-offset:3px}
@media(max-width:820px){.subject-switch button{flex:1 1 120px;gap:8px}.subject-name{white-space:nowrap}.resume-banner{padding:16px 17px;margin:0 0 23px}.resume-banner-head{gap:12px}.resume-banner h2{font-size:1rem}.resume-banner>p{font-size:.8125rem}.resume-scope button{min-height:44px}.resume-chapters{gap:6px}.resume-chapters button{min-height:42px}.resume-facts{padding:14px 15px}.resume-verify{padding:13px 14px}.resume-question-focus{padding:10px 12px}.resume-answer .answer-divider{line-height:1.8}}

.direct-answer{margin:0 0 26px;padding:19px 21px;border:1px solid #bed8ca;border-left:4px solid var(--green);border-radius:9px;background:#f0f7f3;overflow-wrap:anywhere}.direct-answer h3{font-size:1rem;line-height:1.8;margin:0 0 12px;color:#235740}.direct-answer .direct-intro{font-size:1.0625rem;line-height:1.95;font-weight:600;margin:0;color:#274e3a}.direct-part{margin:17px 0 0}.direct-part h4{font-size:.9375rem;line-height:1.8;margin:0 0 5px;color:#315e45}.direct-part p{font-size:1rem;line-height:1.95;margin:0;color:#40594a}@media(max-width:820px){.direct-answer{padding:16px 16px;margin-bottom:23px}.direct-answer .direct-intro{font-size:1rem}.direct-part{margin-top:15px}}