:root{--ink:#202634;--muted:#6e7582;--line:#e7e9ed;--blue:#234e78;--blue-light:#eaf1f8;--navy:#183047;--bg:#f5f5f7;--green:#28775e;--red:#bd3f46;--radius:20px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);font-size:16px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #6b9acb;outline-offset:4px}input,select,textarea{width:100%;border:1px solid #d7dce3;border-radius:11px;background:#fff;padding:12px 14px;color:var(--ink)}textarea{resize:vertical;line-height:1.7}h1,h2,h3,p{margin:0}h1{font-size:clamp(1.9rem,3vw,2.5rem);letter-spacing:-.055em;line-height:1.3;font-weight:650}h2{font-size:1.35rem;letter-spacing:-.025em;font-weight:650}h3{font-size:1.1rem;font-weight:650}p{line-height:1.8}svg.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.muted{color:var(--muted)}.small{font-size:.875rem}.mono{font-variant-numeric:tabular-nums}.skip-link{position:fixed;top:-80px;left:20px;padding:12px;background:white;z-index:100}.skip-link:focus{top:10px}.header{height:78px;position:sticky;top:0;background:rgba(255,255,255,.88);backdrop-filter:blur(22px);border-bottom:1px solid rgba(229,232,236,.8);z-index:20}.nav-wrap{max-width:1320px;margin:auto;padding:0 42px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;white-space:nowrap;font-size:1.14rem;letter-spacing:-.025em}.brand strong{font-weight:580}.brand-symbol{font-size:1.25rem;font-weight:720;width:34px;height:34px;border-radius:10px;background:var(--navy);color:white;display:grid;place-items:center;letter-spacing:-.07em;padding-bottom:3px}.header nav{display:flex;gap:30px;height:100%;align-items:center}.header nav a{position:relative;font-size:.9rem;color:#717680;height:100%;display:flex;align-items:center;white-space:nowrap;transition:color .2s}.header nav a:hover,.header nav a.active{color:var(--ink)}.header nav a.active:after{content:"";height:2px;position:absolute;bottom:0;left:3px;right:3px;background:var(--ink);border-radius:2px}.profile-button{border:0;background:transparent;display:flex;align-items:center;gap:9px;font-size:.8rem;color:var(--muted);padding:0}.save-dot{width:6px;height:6px;border-radius:50%;background:#51846f}.avatar{width:34px;height:34px;background:#e8edf2;color:#43556a;border-radius:50%;font-size:.7rem;display:grid;place-items:center;font-weight:650;margin-left:9px}main{max-width:1236px;min-height:calc(100vh - 185px);margin:auto;padding:34px 0 55px;outline:none}.eyebrow{font-size:.75rem;letter-spacing:.14em;color:var(--muted);font-weight:600;text-transform:uppercase;margin-bottom:10px}.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:26px}.page-head p{font-size:.94rem;color:var(--muted);margin-top:8px}.date{font-size:.875rem;color:var(--muted);padding-bottom:5px}.hero{position:relative;overflow:hidden;border-radius:22px;background:#dfe7e9;min-height:248px;display:grid;grid-template-columns:1fr 1fr;margin-bottom:27px;isolation:isolate}.hero-photo{position:absolute;inset:0;z-index:-2;background:linear-gradient(100deg,#e4edf3,#bacbd5)}.hero-photo img{position:absolute;width:100%;height:100%;object-fit:cover;object-position:50% 46%;transition:opacity 1.8s ease;opacity:0}.hero-photo img.current{opacity:1}.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(237,243,247,.98),rgba(236,241,245,.94) 34%,rgba(237,241,243,.27) 69%,rgba(20,34,42,.08));z-index:-1}.hero-copy{padding:34px 36px;display:flex;flex-direction:column;align-items:flex-start;justify-content:center}.hero .eyebrow{font-size:.72rem;letter-spacing:.15em;color:#52667a}.hero h2{font-size:clamp(1.55rem,2.4vw,2rem);line-height:1.55;letter-spacing:-.045em}.hero-copy p{font-size:.875rem;color:#586a7c;margin:8px 0 22px}.hero .button{font-size:.875rem}.campus-caption{align-self:flex-end;justify-self:end;margin:0 24px 21px;color:white;text-align:right;text-shadow:0 1px 8px #203440}.campus-caption strong{display:block;font-size:.9rem;font-weight:550;margin-bottom:5px}.campus-caption span{font-size:.75rem;letter-spacing:.04em}.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;border-radius:10px;padding:10px 17px;font-size:.875rem;font-weight:550;border:1px solid #dce0e6;background:white;transition:background .2s,transform .2s}.button:hover{background:#f1f3f6}.button.primary{color:white;background:var(--navy);border-color:var(--navy)}.button.primary:hover{background:#2d4c6a}.button.soft{border-color:transparent;background:var(--blue-light);color:var(--blue)}.button .icon{width:17px;height:17px}.button.compact{min-height:36px;padding:7px 12px}.text-button{border:0;padding:2px 0;background:none;color:var(--muted);font-size:.875rem}.text-button:hover{color:var(--ink)}.link-button{color:var(--blue);display:inline-flex;align-items:center;gap:5px;font-size:.875rem;border:0;background:transparent;padding:0;cursor:pointer}.link-button .icon{width:16px;height:16px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:30px 0 18px}.section-heading .small{margin-left:12px;font-size:.8rem;color:var(--muted);font-weight:400}.stats-strip{display:grid;grid-template-columns:repeat(4,1fr);padding:1px 0 9px}.stat{padding:0 25px;border-right:1px solid #dddfe5}.stat:first-child{padding-left:4px}.stat:last-child{border:0}.stat-label{font-size:.8rem;color:var(--muted);display:flex;align-items:center;gap:7px}.stat-label .icon{width:15px;height:15px}.stat-number{font-size:1.7rem;letter-spacing:-.04em;font-weight:620;margin-top:6px}.stat-number span{font-size:.8rem;font-weight:400;color:var(--muted);letter-spacing:0;margin-left:6px}.subject-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.subject-card{display:block;text-align:left;border:1px solid var(--line);background:white;border-radius:18px;padding:23px;transition:box-shadow .2s,transform .2s}.subject-card:hover{transform:translateY(-3px);box-shadow:0 8px 24px #2030480a}.subject-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.subject-mark{height:44px;width:44px;background:var(--tint);color:var(--accent);display:grid;place-items:center;border-radius:13px;font-size:1.3rem;font-weight:550}.subject-mark .icon{width:25px;height:25px}.level-badge{color:#818590;font-size:.7rem;letter-spacing:.04em;border:1px solid var(--line);border-radius:5px;padding:4px 6px}.subject-card h3{font-size:1.06rem;margin-bottom:6px}.subject-en{font-size:.78rem;color:var(--muted);line-height:1.5;min-height:19px}.subject-foot{display:flex;align-items:center;justify-content:space-between;border-top:1px solid #f0f1f4;margin-top:21px;padding-top:15px;color:#848a94;font-size:.75rem}.subject-foot>span:last-child{color:var(--accent);display:flex;align-items:center;gap:7px}.subject-foot .icon{width:15px;height:15px}.two-col{display:grid;grid-template-columns:1.18fr 1fr;gap:22px;margin-top:8px}.panel{background:white;border:1px solid var(--line);border-radius:18px;padding:24px}.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;gap:15px}.panel-head h2{font-size:1.08rem}.empty-inline{font-size:.9rem;color:var(--muted);padding:12px 0;line-height:1.8}.mini-task{display:flex;gap:13px;align-items:center;padding:14px 0;border-bottom:1px solid #f0f1f4}.mini-task:last-child{border:0}.mini-task>div{flex:1}.mini-task h3{font-size:.9rem;font-weight:500}.mini-task p{font-size:.75rem;color:var(--muted);margin-top:3px}.check-task{height:22px;width:22px;flex-shrink:0;border:1px solid #ccd3dc;border-radius:7px;background:white;padding:0;display:grid;place-items:center}.check-task.checked{background:#28775e;border-color:#28775e;color:white}.check-task .icon{width:15px;height:15px}.task-done h3{text-decoration:line-through;color:var(--muted)}.practice-promo{display:flex;gap:18px;align-items:center;background:#f5f7fa;border-radius:13px;padding:20px;margin-bottom:20px}.practice-promo .subject-mark{flex-shrink:0}.practice-promo p{color:var(--muted);font-size:.8rem;margin-top:7px}.practice-promo h3{font-size:.97rem}.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{border:1px solid var(--line);border-radius:8px;background:white;padding:8px 13px;font-size:.8rem;color:var(--muted)}.chip.active{border-color:var(--navy);background:var(--navy);color:white}.footer{max-width:1236px;margin:auto;border-top:1px solid #e2e4e8;display:flex;gap:20px;align-items:center;justify-content:space-between;font-size:.75rem;color:#90949d;padding:26px 0 30px}.footer-brand{font-size:.83rem;font-weight:600;color:#737983;letter-spacing:-.03em}.footer>div{display:flex;gap:12px}.footer .text-button{font-size:.75rem}.footer-divider{color:#adb1b8}.sub-heading{margin:6px 0 25px}.back-link{display:inline-flex;align-items:center;gap:7px;color:var(--muted);font-size:.875rem;margin-bottom:20px}.subject-title{display:flex;gap:16px;align-items:center}.subject-title .subject-mark{height:62px;width:62px;border-radius:18px;font-size:1.8rem}.subject-title .subject-mark .icon{height:32px;width:32px}.subject-title h1{font-size:2rem}.subject-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:23px}.topic-sidebar{height:fit-content;padding:12px;background:white;border:1px solid var(--line);border-radius:16px}.topic-sidebar-label{padding:10px 12px 16px;font-size:.75rem;letter-spacing:.1em;color:var(--muted)}.topic-button{display:flex;align-items:flex-start;gap:12px;width:100%;border:0;background:none;text-align:left;padding:15px 12px;border-radius:10px;margin:2px 0;font-size:.875rem;line-height:1.6}.topic-button.active{background:var(--tint);color:var(--accent)}.topic-index{font-size:.7rem;color:var(--muted);padding-top:3px}.topic-name{flex:1}.topic-button .icon{width:16px;height:16px;margin-top:3px;color:var(--green)}.lesson{background:white;border:1px solid var(--line);border-radius:18px;padding:34px}.lesson .eyebrow{color:var(--accent)}.lesson h2{font-size:1.55rem;margin:8px 0 8px}.lesson-intro{color:var(--muted);margin-bottom:26px}.lesson h3{font-size:1rem;margin:25px 0 11px}.lesson ul{padding-left:21px;line-height:1.95;margin:0;color:#4e5867}.formula{border-radius:12px;background:#f4f7fa;padding:20px 24px;font-size:1.17rem;line-height:1.8;color:#264a6d;margin:20px 0;letter-spacing:.015em;overflow-wrap:anywhere}.lesson-example{border-left:3px solid var(--accent);padding:2px 0 2px 18px;margin:23px 0;color:#55606e;font-size:.94rem;line-height:1.85}.lesson-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;padding-top:23px;border-top:1px solid var(--line)}.note-field{margin-top:26px}.note-label{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px;font-size:.875rem}.note-save{font-size:.75rem;color:var(--muted)}.subject-footnote{margin-top:16px;font-size:.8rem;color:var(--muted);line-height:1.8}.subject-footnote a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.toolbar{display:flex;gap:12px;margin-bottom:22px;align-items:center;flex-wrap:wrap}.toolbar select{width:auto;min-width:170px;font-size:.875rem}.toolbar input{max-width:330px}.toolbar .spacer{flex:1}.question-list{display:grid;gap:11px}.question-row{display:flex;gap:18px;align-items:center;background:white;border:1px solid var(--line);padding:22px 24px;border-radius:14px}.question-row>div:nth-child(2){flex:1;min-width:0}.question-row h3{font-size:.98rem;line-height:1.65;font-weight:550}.question-row p{font-size:.8rem;color:var(--muted);margin-top:7px}.question-row .subject-mark{width:40px;height:40px;border-radius:11px;font-size:1.1rem;flex-shrink:0}.pill{font-size:.72rem;padding:4px 7px;border-radius:6px;background:#f2f4f6;color:#7c828b;white-space:nowrap}.pill.success{background:#e9f4ee;color:var(--green)}.pill.error{background:#faedef;color:var(--red)}.empty-state{text-align:center;padding:65px 25px;background:white;border:1px solid var(--line);border-radius:18px}.empty-state .icon{width:35px;height:35px;color:#99a7b7;margin-bottom:17px}.empty-state h2{font-size:1.2rem;margin-bottom:10px}.empty-state p{color:var(--muted);font-size:.9rem}.empty-state .button{margin-top:22px}.plan-layout{display:grid;grid-template-columns:1fr 340px;gap:23px}.plan-list{padding:10px 24px}.plan-form{align-self:start}.form-field{display:block;font-size:.875rem;margin:20px 0}.form-field input,.form-field select,.form-field textarea{margin-top:9px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:13px}.form-row .form-field{margin:0 0 20px}.full-width{width:100%}.delete-task{border:0;background:none;color:#a1a6ae;padding:6px;flex-shrink:0}.delete-task .icon{width:17px;height:17px}.delete-task:hover{color:var(--red)}.progress-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin:30px 0}.progress-row{display:flex;gap:12px;align-items:center;margin:23px 0}.progress-row .subject-mark{width:34px;height:34px;font-size:1rem;border-radius:10px}.progress-row .subject-mark .icon{width:20px;height:20px}.progress-row>div:nth-child(2){flex:1}.progress-row-label{display:flex;justify-content:space-between;gap:12px;font-size:.8rem;margin-bottom:9px}.bar{height:5px;background:#eff1f4;border-radius:20px;overflow:hidden}.bar>span{display:block;height:100%;background:var(--accent,var(--blue));border-radius:20px;transition:width .3s}.week-chart{height:200px;display:flex;gap:14px;align-items:flex-end;padding-top:28px}.day-column{flex:1;display:flex;flex-direction:column;align-items:center;gap:10px;height:100%;justify-content:flex-end}.day-column .day-bar{width:min(100%,34px);min-height:3px;border-radius:6px 6px 2px 2px;background:#7e9ab6}.day-column.today .day-bar{background:var(--navy)}.day-column span{font-size:.7rem;color:var(--muted)}.records{overflow:auto}.record-table{width:100%;border-collapse:collapse;font-size:.875rem;text-align:left}.record-table th{color:var(--muted);font-weight:400;font-size:.75rem;padding:12px 15px;border-bottom:1px solid var(--line);white-space:nowrap}.record-table td{padding:16px 15px;border-bottom:1px solid #f0f2f4;line-height:1.65}.record-table tr:last-child td{border:0}.record-table td:first-child{color:var(--muted);font-size:.78rem;white-space:nowrap}dialog{border:0;padding:0;border-radius:23px;max-width:650px;width:calc(100% - 32px);max-height:calc(100dvh - 48px);box-shadow:0 25px 110px #0f233c38;color:var(--ink);background:#fff}dialog::backdrop{background:#1d283958;backdrop-filter:blur(6px)}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:25px 28px 18px}.modal-header h2{font-size:1.15rem}.close-modal{border:0;background:#f2f3f5;border-radius:50%;width:31px;height:31px;display:grid;place-items:center}.close-modal .icon{width:16px;height:16px}.modal-body{padding:4px 28px 28px}.modal-body>p{font-size:.9rem;color:var(--muted)}.quiz-meta{display:flex;gap:7px;align-items:center;color:var(--muted);font-size:.75rem;margin-bottom:18px}.quiz-question{font-size:1.17rem;line-height:1.8;font-weight:550;margin:4px 0 21px}.quiz-options{display:grid;gap:10px}.quiz-option{display:flex;align-items:center;gap:13px;border:1px solid #dfe3e9;background:#fff;border-radius:11px;text-align:left;padding:14px 17px;font-size:.94rem;line-height:1.65;opacity:1!important}.quiz-option:hover:not(:disabled){background:#f4f7fb;border-color:#a6bcd3}.option-letter{width:27px;min-width:27px;height:27px;display:grid;place-items:center;border:1px solid #dce0e6;border-radius:7px;font-size:.75rem;color:#78828f}.option-text{flex:1}.quiz-option.selected{background:#edf3fa;border-color:#6386aa}.quiz-option.selected .option-letter{background:#426a91;border-color:#426a91;color:white}.quiz-option.correct{border-color:#69a58a;background:#eff8f3;color:#226d52}.quiz-option.wrong{border-color:#d67a7e;background:#fff0f0;color:#ab3943}.quiz-option.wrong .option-letter{border-color:#d47f87;color:#ae3f49;background:#ffe3e6}.quiz-option.correct .option-letter{border-color:#8bb89f;color:var(--green);background:#e2f1e8}.quiz-actions{display:flex;gap:10px;justify-content:space-between;align-items:center;margin-top:25px}.feedback{border-radius:12px;background:#f4f7fa;padding:19px;margin-top:21px}.feedback strong{font-size:.94rem;display:flex;gap:7px;align-items:center}.feedback p{font-size:.875rem;line-height:1.85;margin-top:8px;color:#516173}.feedback.correct strong{color:var(--green)}.feedback.wrong strong{color:var(--red)}.quiz-count{font-size:.75rem;color:var(--muted)}.data-section{margin-top:24px;padding-top:21px;border-top:1px solid var(--line)}.data-section h3{font-size:.94rem;margin-bottom:8px}.data-section p{font-size:.8rem;color:var(--muted);margin-bottom:14px}.action-row{display:flex;flex-wrap:wrap;gap:10px}.import-status{font-size:.85rem;margin-top:13px}.storage-warning{background:#fff4dd;border-radius:10px;padding:12px;font-size:.85rem;margin-bottom:15px;color:#735221}.sources-list{padding-left:20px;line-height:1.9;font-size:.875rem}.sources-list li{margin:12px 0}.sources-list a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}.sources-list small{display:block;color:var(--muted);font-size:.75rem}.timer-value{text-align:center;font-size:4.2rem;letter-spacing:-.055em;font-weight:350;font-variant-numeric:tabular-nums;padding:20px 0}.timer-label{text-align:center;font-size:.9rem;color:var(--muted);margin:10px 0 20px}.timer-options{display:flex;gap:8px;justify-content:center}.timer-actions{display:flex;justify-content:center;gap:12px;margin:25px 0 10px}#toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;padding:13px 21px;background:#1d3047;color:#fff;border-radius:12px;z-index:100;font-size:.875rem;max-width:calc(100% - 30px);box-shadow:0 8px 30px #1d304728;transition:opacity .2s,transform .2s}#toast.show{opacity:1;transform:translate(-50%,0)}#cursor-trail{position:fixed;inset:0;pointer-events:none;z-index:50;width:100%;height:100%}.view-enter{animation:enter .3s ease-out}@keyframes enter{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
@media(min-width:1440px){main{padding-top:42px}.hero{min-height:260px}.subject-card{padding:25px}}
@media(max-width:1340px){main,.footer{margin-left:42px;margin-right:42px}.nav-wrap{padding:0 42px}.header nav{gap:24px}}
@media(max-width:1020px){.nav-wrap{padding:0 26px;gap:20px}.header nav{gap:19px}.desktop-label,.profile-button .save-dot{display:none}main,.footer{margin-left:26px;margin-right:26px}.subject-grid{gap:14px}.subject-card{padding:20px}.hero-copy{padding:29px}.plan-layout{grid-template-columns:1fr 290px}.subject-layout{grid-template-columns:225px minmax(0,1fr)}.lesson{padding:26px}.header nav a{font-size:.83rem}.hero{grid-template-columns:1.2fr 1fr}.date{font-size:.78rem}}
@media(max-width:760px){.header{height:auto}.nav-wrap{display:grid;grid-template-columns:1fr auto;gap:0;padding:15px 20px 0}.brand{font-size:1.1rem}.header nav{grid-column:1/-1;grid-row:2;gap:0;justify-content:space-between;margin-top:12px;height:42px;overflow-x:auto}.header nav a{height:42px;padding:0 5px;font-size:.8rem}.profile-button{grid-column:2;grid-row:1}main{margin:0 20px;padding:28px 0 35px}.page-head{align-items:flex-start;margin-bottom:22px}.page-head .date{display:none}.page-head p{font-size:.85rem}.eyebrow{font-size:.7rem}.hero{grid-template-columns:1fr;min-height:282px;border-radius:18px;margin-bottom:25px}.hero-copy{padding:25px;justify-content:flex-start}.hero h2{font-size:1.55rem}.hero-copy p{max-width:80%;margin-bottom:17px;font-size:.8rem}.hero:after{background:linear-gradient(90deg,rgba(237,243,247,.97),rgba(237,243,247,.86) 48%,rgba(237,243,247,.25))}.campus-caption{position:absolute;right:0;bottom:0;margin:0 18px 15px;font-size:.7rem}.campus-caption strong{font-size:.75rem}.campus-caption span{font-size:.65rem}.stats-strip{grid-template-columns:repeat(4,1fr)}.stat{padding:0 10px}.stat-label{font-size:.68rem;gap:4px}.stat-label .icon{display:none}.stat-number{font-size:1.35rem}.stat-number span{font-size:.65rem;margin-left:4px}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.subject-card{padding:17px}.subject-top{margin-bottom:14px}.subject-mark{height:39px;width:39px;border-radius:11px}.level-badge{font-size:.6rem;padding:3px}.subject-card h3{font-size:.97rem}.subject-en{font-size:.7rem;min-height:34px}.subject-foot{font-size:.68rem;margin-top:15px;padding-top:13px}.subject-foot>span:last-child{gap:3px}.section-heading h2{font-size:1.15rem}.section-heading .small{display:none}.two-col,.progress-grid,.plan-layout{grid-template-columns:1fr}.two-col{gap:16px}.panel{padding:21px}.footer{margin:0 20px;flex-wrap:wrap;padding:23px 0;gap:16px}.footer>span:nth-child(2){display:none}.footer>div{margin-left:auto}.subject-layout{grid-template-columns:1fr;gap:16px}.topic-sidebar{display:flex;overflow-x:auto;gap:5px;padding:7px;border-radius:13px}.topic-sidebar-label{display:none}.topic-button{white-space:nowrap;width:auto;padding:11px 13px;gap:8px;font-size:.8rem;align-items:center;margin:0}.topic-index{padding:0}.topic-button .icon{margin:0}.subject-title h1{font-size:1.65rem}.subject-title .subject-mark{width:50px;height:50px;font-size:1.4rem;border-radius:15px}.lesson{padding:23px}.lesson h2{font-size:1.3rem}.lesson-intro{font-size:.9rem}.lesson ul{font-size:.92rem}.formula{font-size:1rem;padding:17px}.toolbar{gap:9px}.toolbar select{flex:1;min-width:130px;font-size:.8rem;padding:11px}.toolbar .spacer{display:none}.toolbar input{max-width:none;width:100%;font-size:.875rem;order:3}.question-row{padding:18px 16px;gap:12px;flex-wrap:wrap}.question-row>div:nth-child(2){flex-basis:calc(100% - 56px)}.question-row>.button{margin-left:auto;min-height:34px;padding:6px 12px}.question-row>.pill{margin-left:52px}.question-row h3{font-size:.9rem}.question-row p{font-size:.7rem}.plan-form{grid-row:1}.form-field{margin:15px 0}.plan-form .form-field:first-of-type{margin-top:0}.modal-header{padding:22px 22px 18px}.modal-body{padding:3px 22px 24px}.quiz-question{font-size:1.03rem}.quiz-option{font-size:.875rem;padding:12px}.quiz-actions{gap:9px}.quiz-actions .button{font-size:.8rem;padding:10px 13px}.quiz-count{font-size:.68rem}.record-table{font-size:.8rem}.record-table td{min-width:90px;padding:13px 10px}.record-table td:nth-child(3){min-width:160px}.page-head>.button{font-size:.8rem;white-space:nowrap;padding:10px 12px}.sub-heading{margin-bottom:18px}.footer .text-button{font-size:.7rem}.subject-foot>span:last-child .icon{width:12px;height:12px}}
@media(max-width:380px){main,.footer{margin-left:14px;margin-right:14px}.nav-wrap{padding-left:14px;padding-right:14px}.subject-card{padding:14px}.subject-foot{font-size:.64rem}.stat{padding:0 6px}.stat-label{font-size:.65rem}.stats-strip .stat-number span{display:none}.hero h2{font-size:1.35rem}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}#cursor-trail{display:none}}
@media(max-width:760px){.subject-foot{flex-direction:column;align-items:flex-start;gap:8px}.subject-foot>span{white-space:nowrap}.subject-foot>span:last-child{align-self:flex-end}.hero{min-height:270px}}
.account-login{font-size:.85rem;color:var(--blue);font-weight:550}.save-dot.pending{background:#b78938}.auth-tabs{display:flex;gap:8px;margin-bottom:8px}.auth-footer{text-align:center;margin-top:20px}.auth-disclosure{font-size:.78rem!important;line-height:1.8;color:var(--muted);margin:17px 0}.form-error{color:var(--red);font-size:.875rem;line-height:1.7;margin:12px 0;min-height:0}.owner-setup{margin:15px 0;font-size:.8rem;color:var(--muted)}summary{cursor:pointer}.owner-setup .form-field{margin-bottom:5px}.recovery-code{font-family:ui-monospace,Consolas,monospace;font-size:1.2rem;letter-spacing:.035em;overflow-wrap:anywhere;background:#eff4f8;padding:22px;border-radius:12px;margin:22px 0;color:var(--navy)}.account-summary{display:flex;gap:18px;align-items:center;margin:7px 0 25px}.account-summary .avatar{width:58px;height:58px;font-size:1rem;margin:0}.account-summary h3{margin:0 0 5px}.account-summary p{font-size:.85rem;color:var(--muted);margin-bottom:9px}.rank-summary{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:27px 32px;background:#eaf0f6;border:1px solid #dfe7f0;border-radius:18px;margin:25px 0}.rank-summary h2{font-size:1.8rem;letter-spacing:-.045em;margin-top:9px}.rank-summary small,.rank-points small{font-size:.8rem;font-weight:400;color:var(--muted)}.rank-row{display:flex;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding:18px 15px}.rank-row:last-child{border:0}.rank-row.is-me{background:#f4f7fb;border-radius:10px}.rank-number{font-variant-numeric:tabular-nums;color:var(--muted);width:22px}.rank-row .avatar{margin:0;width:38px;height:38px}.rank-row strong{flex:1;font-size:.95rem;font-weight:550}.rank-row strong small{font-size:.7rem;color:var(--blue);margin-left:7px}.rank-points{font-weight:650;font-size:1.1rem;min-width:85px;text-align:right}.admin-table td:first-child small{display:block;color:var(--muted);font-size:.72rem;margin-top:5px}.admin-table td:first-child strong{color:var(--ink);font-size:.875rem}.admin-table .action-row{min-width:175px}.profile-stats{display:flex;flex-wrap:wrap;gap:15px;font-size:.85rem;background:#f4f7fa;padding:18px;border-radius:12px;margin:20px 0}.admin-note{font-size:.875rem;margin:14px 0}.admin-note p{white-space:pre-wrap;overflow-wrap:anywhere;color:#536171;padding:13px;background:#f7f8fa;border-radius:10px;margin-top:8px}.header nav{gap:22px}
@media(max-width:1020px){.header nav{gap:14px}.header nav a{font-size:.78rem}.desktop-label{display:none}}
@media(max-width:760px){.header nav{justify-content:flex-start;gap:15px}.header nav a{flex-shrink:0;padding:0 1px}.rank-summary{padding:23px;flex-wrap:wrap;gap:24px}.rank-summary h2{font-size:1.5rem}.rank-summary>.button{width:100%}.rank-summary .small{font-size:.75rem}.rank-row{padding:16px 6px;gap:10px}.rank-row strong{font-size:.85rem}.rank-row .avatar{width:30px;height:30px;font-size:.65rem}.rank-row .pill{font-size:.65rem;padding:3px 5px}.rank-points{font-size:.9rem;min-width:50px}.rank-points small{display:none}.rank-number{font-size:.8rem;width:17px}.account-summary p{word-break:break-all}.rank-row strong{overflow-wrap:anywhere}}