:root{--paper: #f5f3fb;--page: #ffffff;--ink: #2b2d5c;--ink-soft: #5b5d86;--ink-faint: #8f90b0;--rule: #e4e2f1;--margin-line: #f2b8c6;--lilac: #e4dbfb;--lilac-deep: #7a66d9;--mint: #cfefe0;--mint-deep: #2f8a62;--butter: #fff0b5;--butter-deep: #a77d0a;--peach: #ffdccf;--peach-deep: #c4552f;--sky: #d3e7fb;--sky-deep: #2f6fae;--rose: #fbd5e4;--rose-deep: #b83f70;--danger: #b4233c;--danger-bg: #fde4e8;--font-display: "Baloo 2", "Segoe UI", system-ui, sans-serif;--font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, sans-serif;--r-cover: 6px 22px 22px 6px;--r-card: 18px;--r-control: 12px;--r-pill: 999px;--shadow-page: 0 1px 0 #ebe8f6, 0 10px 30px -18px rgba(43, 45, 92, .35);--shadow-lift: 0 14px 30px -16px rgba(43, 45, 92, .45);--sidebar-w: 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var(--rule)}.sidebar-foot .who{min-width:0;flex:1}.sidebar-foot .who strong{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.avatar{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;background:var(--butter);flex:none}.main{padding:36px clamp(16px,4vw,48px) 64px;max-width:1160px;width:100%}.mobile-top,.tabbar{display:none}@media(max-width:860px){.shell{grid-template-columns:1fr;background:none}.sidebar{display:none}.mobile-top{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;background:var(--page);border-bottom:1px solid var(--rule);position:sticky;top:0;z-index:20}.main{padding:22px 16px 110px}.tabbar{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:10px;right:10px;bottom:10px;background:var(--ink);border-radius:22px;padding:6px;z-index:30;box-shadow:var(--shadow-lift)}.tabbar a{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 2px;color:#c9c9e6;text-decoration:none;font-size:.7rem;border-radius:16px}.tabbar a.active{background:var(--lilac);color:var(--ink)}}.page-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:26px}.page-head p{margin-top:6px;color:var(--ink-soft);max-width:60ch}.section{margin-top:36px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px}.section-head a{font-weight:700;color:var(--lilac-deep);text-decoration:none}.notebook{position:relative;background-color:var(--page);background-image:repeating-linear-gradient(to bottom,transparent 0,transparent 33px,var(--rule) 33px,var(--rule) 34px);background-position:0 14px;border-radius:4px 20px 20px 4px;padding:34px 28px 30px 76px;box-shadow:var(--shadow-page);overflow:hidden}.notebook:before{content:"";position:absolute;top:0;bottom:0;left:56px;border-left:2px solid var(--margin-line)}.notebook:after{content:"";position:absolute;left:18px;top:30px;width:16px;height:calc(100% - 60px);background:radial-gradient(circle,var(--paper) 6px,transparent 7px) 0 0 / 16px 68px repeat-y}.tape{position:absolute;top:-8px;right:46px;width:116px;height:30px;background:repeating-linear-gradient(45deg,var(--butter) 0 8px,#fff6cf 8px 16px);opacity:.92;transform:rotate(4deg);box-shadow:0 2px 4px #2b2d5c14}.notebook-greeting{font-size:clamp(2rem,1.3rem + 3vw,3.4rem);font-weight:800;line-height:1.05;max-width:16ch}.notebook-line{margin-top:10px;font-size:1.05rem;color:var(--ink-soft);max-width:52ch}.notebook-stats{display:flex;flex-wrap:wrap;gap:12px 30px;margin-top:24px}.notebook-stat strong{display:block;font-family:var(--font-display);font-size:1.6rem;line-height:1.1}.notebook-stat span{color:var(--ink-soft);font-size:.9rem}@media(max-width:560px){.notebook{padding:30px 18px 24px 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var(--butter);--tone-deep: var(--butter-deep)}.t-peach{--tone: var(--peach);--tone-deep: var(--peach-deep)}.t-sky{--tone: var(--sky);--tone-deep: var(--sky-deep)}.t-rose{--tone: var(--rose);--tone-deep: var(--rose-deep)}.panel{background:var(--page);border-radius:var(--r-card);padding:22px;box-shadow:var(--shadow-page)}.panel+.panel{margin-top:16px}.panel-tinted{background:var(--tone);border-radius:var(--r-card);padding:20px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.dash-grid{display:grid;grid-template-columns:minmax(0,1.4fr) 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var(--ink-soft));white-space:nowrap}.icon-blob{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--tone);color:var(--tone-deep);flex:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:var(--r-control);border:none;background:var(--ink);color:#fff;font-weight:700;cursor:pointer;text-decoration:none;transition:background .15s ease,transform .1s ease;white-space:nowrap}.btn:hover{background:#3b3e7a}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.55;cursor:not-allowed}.btn.soft{background:var(--lilac);color:var(--ink)}.btn.soft:hover{background:#d8ccf8}.btn.ghost{background:transparent;color:var(--ink-soft);border:1.5px solid var(--rule)}.btn.ghost:hover{background:var(--page);color:var(--ink)}.btn.danger{background:var(--danger-bg);color:var(--danger)}.btn.sm{padding:7px 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span{display:inline-block;width:8px;height:8px;margin-right:4px;border-radius:50%;background:var(--lilac-deep);animation:bob .9s infinite ease-in-out}.dots span:nth-child(2){animation-delay:.15s;background:var(--mint-deep)}.dots span:nth-child(3){animation-delay:.3s;background:var(--peach-deep)}@keyframes bob{0%,to{transform:translateY(0);opacity:.5}50%{transform:translateY(-5px);opacity:1}}.spin{animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty{text-align:center;padding:36px 18px;border:2px dashed var(--rule);border-radius:var(--r-card);color:var(--ink-soft)}.empty .emoji{font-size:2.2rem}.empty h3{margin:8px 0 4px;color:var(--ink)}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%);background:var(--ink);color:#fff;padding:12px 18px;border-radius:14px;z-index:100;box-shadow:var(--shadow-lift);animation:rise .25s ease;max-width:calc(100vw - 32px)}@media(max-width:860px){.toast{bottom:96px}}@keyframes 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small{display:block;font-family:var(--font-body);font-weight:400;font-size:.72rem;color:var(--ink-soft);margin-top:2px}.ring circle{transition:stroke-dashoffset .8s ease}.bar{height:10px;border-radius:var(--r-pill);background:var(--paper);overflow:hidden}.bar>i{display:block;height:100%;border-radius:inherit;background:var(--tone-deep, var(--lilac-deep))}.auth{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr)}.auth-art{position:relative;padding:48px clamp(24px,5vw,64px);display:flex;flex-direction:column;background:var(--lilac);overflow:hidden}.auth-art h1{font-size:clamp(2.4rem,1.4rem + 3.4vw,4.2rem);font-weight:800;line-height:1.02;max-width:11ch;margin-top:auto}.auth-art p{margin-top:16px;max-width:44ch;font-size:1.08rem;color:var(--ink-soft)}.stack-books{position:relative;height:230px;margin:36px 0 28px}.stack-books .book{position:absolute;width:150px;height:196px;border-radius:var(--r-cover);background:var(--tone);box-shadow:var(--shadow-lift);padding:14px 12px 12px 24px;display:flex;flex-direction:column}.stack-books .book:before{content:"";position:absolute;left:0;top:0;bottom:0;width:12px;border-radius:6px 0 0 6px;background:var(--tone-deep)}.stack-books .book .tag{margin-top:auto;background:#fff;border-radius:8px;padding:6px 8px;font-family:var(--font-display);font-weight:700;font-size:.9rem;border:1.5px solid var(--tone-deep)}.stack-books .book:nth-child(1){left:0;top:24px;transform:rotate(-8deg)}.stack-books .book:nth-child(2){left:110px;top:0;transform:rotate(3deg);z-index:1}.stack-books .book:nth-child(3){left:220px;top:30px;transform:rotate(10deg)}.auth-form{padding:48px clamp(20px,5vw,64px);display:flex;flex-direction:column;justify-content:center;background:var(--page)}.auth-form-inner{width:100%;max-width:440px;margin:0 auto}.demo-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.demo-row button{border:1.5px solid var(--rule);background:var(--page);border-radius:var(--r-control);padding:10px 6px;cursor:pointer;font-weight:700;display:flex;flex-direction:column;align-items:center;gap:2px}.demo-row button:hover{border-color:var(--tone-deep);background:var(--tone)}.demo-row button span{font-size:1.3rem}.divider{display:flex;align-items:center;gap:12px;color:var(--ink-faint);font-size:.85rem;margin:20px 0}.divider:before,.divider:after{content:"";flex:1;border-top:1px solid var(--rule)}.school-results{position:absolute;z-index:10;left:0;right:0;top:calc(100% + 6px);background:var(--page);border-radius:14px;box-shadow:var(--shadow-lift);max-height:260px;overflow:auto;padding:6px;margin:0;list-style:none}.school-results button{width:100%;text-align:left;background:none;border:none;padding:9px 10px;border-radius:10px;cursor:pointer}.school-results button:hover{background:var(--paper)}@media(max-width:900px){.auth{grid-template-columns:1fr}.auth-art{padding:28px 20px}.auth-art h1{margin-top:12px;font-size:2.3rem}.stack-books{display:none}.auth-form{padding:28px 20px 48px}}.chapter{background:var(--page);border-radius:16px;box-shadow:var(--shadow-page);overflow:hidden}.chapter+.chapter{margin-top:10px}.chapter-head{width:100%;display:flex;align-items:center;gap:16px;padding:16px 18px;border:none;background:none;text-align:left;cursor:pointer}.chapter-num{font-family:var(--font-display);font-weight:800;font-size:1.5rem;width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--tone);color:var(--tone-deep);flex:none}.chapter-body{padding:0 18px 18px 78px}@media(max-width:560px){.chapter-body{padding:0 16px 16px}}.chev{transition:transform .2s ease;color:var(--ink-faint)}.chev.open{transform:rotate(180deg)}.quiz-shell{max-width:760px}.quiz-progress{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0}.quiz-progress button{width:36px;height:36px;border-radius:10px;border:1.5px solid var(--rule);background:var(--page);font-weight:700;cursor:pointer}.quiz-progress button.answered{background:var(--mint);border-color:var(--mint)}.quiz-progress button.current{border-color:var(--ink)}.option{display:flex;align-items:center;gap:14px;width:100%;text-align:left;padding:14px 16px;border-radius:14px;border:2px solid var(--rule);background:var(--page);cursor:pointer;transition:border-color .15s ease,background .15s ease}.option:hover{border-color:var(--lilac-deep)}.option .letter{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;font-family:var(--font-display);font-weight:800;background:var(--paper);flex:none}.option.selected{border-color:var(--ink);background:var(--lilac)}.option.selected .letter{background:var(--ink);color:#fff}.option.correct{border-color:var(--mint-deep);background:var(--mint)}.option.wrong{border-color:var(--danger);background:var(--danger-bg)}.timer{font-family:var(--font-display);font-weight:800;font-size:1.3rem;padding:4px 14px;border-radius:12px;background:var(--butter)}.timer.low{background:var(--danger-bg);color:var(--danger)}.result-score{font-family:var(--font-display);font-weight:800;font-size:clamp(3rem,2rem + 4vw,5rem);line-height:1}.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:6px}.cal .dow{text-align:center;font-size:.75rem;color:var(--ink-faint);padding-bottom:4px}.cal .day{aspect-ratio:1;border-radius:10px;display:grid;place-items:center;font-size:.9rem;background:var(--paper);color:var(--ink-faint)}.cal .day.present{background:var(--mint);color:var(--mint-deep);font-weight:700}.cal .day.absent{background:var(--rose);color:var(--rose-deep);font-weight:700}.cal .day.late{background:var(--butter);color:var(--butter-deep);font-weight:700}.cal .day.holiday{background:var(--sky);color:var(--sky-deep)}.cal .day.today{outline:2px solid var(--ink);outline-offset:-2px}.cal .blank{background:transparent}.legend{display:flex;flex-wrap:wrap;gap:14px;margin-top:14px;font-size:.85rem;color:var(--ink-soft)}.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:6px;vertical-align:-1px}.roll{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--rule);flex-wrap:wrap}.roll:last-child{border-bottom:none}.status-pick{display:inline-flex;gap:6px}.status-pick button{border:1.5px solid var(--rule);background:var(--page);border-radius:10px;padding:6px 10px;font-weight:700;font-size:.85rem;cursor:pointer;color:var(--ink-soft)}.status-pick button[aria-pressed=true].present{background:var(--mint);border-color:var(--mint-deep);color:var(--mint-deep)}.status-pick button[aria-pressed=true].absent{background:var(--rose);border-color:var(--rose-deep);color:var(--rose-deep)}.status-pick button[aria-pressed=true].late{background:var(--butter);border-color:var(--butter-deep);color:var(--butter-deep)}.ticket{position:relative;display:flex;flex-direction:column;gap:10px;padding:20px;border-radius:var(--r-card);background:var(--page);box-shadow:var(--shadow-page);border-top:6px solid var(--tone)}.ticket .amount{font-family:var(--font-display);font-weight:800;font-size:1.45rem;line-height:1.1}.ticket .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding-top:12px;border-top:1px dashed var(--rule)}.table{width:100%;border-collapse:collapse}.table th{text-align:left;font-size:.82rem;color:var(--ink-faint);font-weight:700;padding:8px 10px;border-bottom:1px solid var(--rule)}.table td{padding:11px 10px;border-bottom:1px solid var(--rule)}.table tr:last-child td{border-bottom:none}.table-wrap{overflow-x:auto}.medal{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-family:var(--font-display);font-weight:800;background:var(--paper)}.medal.r1{background:var(--butter)}.medal.r2{background:var(--sky)}.medal.r3{background:var(--peach)}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}