:root{--ink:#1c2549;--muted:#7883a0;--brand:#4f5df5;--brand-dark:#3c4ddc;--line:#e9ebf5;--surface:#fff;--canvas:#f8faff;--radius:20px;--shadow:0 18px 60px rgba(39,54,121,.07)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;font-family:'Be Vietnam Pro',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;color:var(--ink);background:#fff;line-height:1.55}button,input,select{font:inherit}button{cursor:pointer}a{text-decoration:none;color:inherit}svg{width:24px;height:24px}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #a0a7ff;outline-offset:3px}.container{width:min(1160px,calc(100% - 48px));margin-inline:auto}.site-header{height:90px;background:rgba(255,255,255,.93);backdrop-filter:blur(20px);position:sticky;top:0;z-index:40;border-bottom:1px solid #eff0f8}.nav-layout{height:100%;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:11px;min-width:215px}.brand-icon{width:47px;height:47px;border-radius:14px;background:linear-gradient(145deg,#6472ff,#3e50e3);box-shadow:0 10px 18px #4b60ea29;display:grid;place-items:center;color:white;flex-shrink:0}.brand-icon svg{width:31px;height:31px}.brand-copy{display:flex;flex-direction:column;line-height:1.2;letter-spacing:-.7px}.brand-copy strong{font-size:16px;font-weight:900;white-space:nowrap}.brand-copy strong span{color:#4a59ed}.brand-copy small{font-size:11px;color:#98a0b5;font-weight:700;letter-spacing:1.5px;margin-top:4px}.desktop-nav,.nav-actions{display:flex;align-items:center;gap:33px}.desktop-nav a{font-size:13px;font-weight:700;color:#65718c;transition:.2s}.desktop-nav a:hover,.desktop-nav a.active{color:#4659ed}.header-library{display:flex;align-items:center;gap:8px;padding:12px 17px;background:#eef0ff;color:#4b59e5;border-radius:13px;font-weight:800;font-size:12px;white-space:nowrap}.header-library svg{width:17px;height:17px}.header-library span{font-size:17px}.menu-toggle{display:none;border:0;background:#f1f3ff;border-radius:10px;width:42px;height:42px;padding:11px;flex-direction:column;justify-content:center;gap:5px}.menu-toggle span{width:100%;height:2px;background:#4555d8;border-radius:4px}.mobile-nav{display:none}.hero{background:radial-gradient(ellipse at 79% 21%,#e9eaff 0,transparent 38%),radial-gradient(ellipse at 8% 91%,#fff2e6 0,transparent 39%),linear-gradient(145deg,#fafbff,#f4f7ff 61%,#f6fbff);overflow:hidden}.hero-grid{min-height:615px;display:grid;grid-template-columns:53% 47%;align-items:center;position:relative}.hero-copy{padding:64px 0 74px;position:relative;z-index:2}.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:10px;font-weight:900;letter-spacing:1.2px;color:#4f5ede;padding:8px 12px;border:1px solid #dfe4ff;background:#fff;border-radius:100px;box-shadow:0 5px 17px #5b6be010}.eyebrow-dot{width:7px;height:7px;border-radius:50%;background:#52ceac;box-shadow:0 0 0 4px #ddfaf1}.eyebrow-shine{font-size:14px;color:#ffaa5b}.hero h1{font-size:clamp(36px,4.1vw,55px);line-height:1.37;letter-spacing:-2.7px;font-weight:900;margin:23px 0 16px}.text-gradient{background:linear-gradient(100deg,#5568f4,#9f68e8);color:transparent;background-clip:text}.hero-subtitle{color:#697795;font-size:14px;line-height:2;max-width:515px;margin:0 0 28px}.hero-subtitle strong{color:#3d4e9b}.hero-search{display:flex;align-items:center;gap:10px;background:white;border:1px solid #e6e8f5;box-shadow:0 16px 45px #5361a31a;border-radius:16px;padding:7px 7px 7px 19px;max-width:570px}.search-icon{width:20px;height:20px;flex-shrink:0;color:#9aa4bf}.hero-search input{border:0;outline:0;min-width:0;flex:1;font-size:13px;color:#2d365b;background:transparent}.hero-search input::placeholder{color:#a3acc1}.hero-search button{white-space:nowrap;display:flex;gap:13px;align-items:center;border:0;background:#4f60f1;color:white;font-weight:800;font-size:12px;border-radius:11px;padding:15px 16px;transition:transform .2s,background .2s}.hero-search button:hover{background:#384adf;transform:translateY(-1px)}.hero-search button span{font-size:17px}.hero-shortcuts{display:flex;align-items:center;flex-wrap:wrap;gap:8px;margin-top:15px;font-size:11px;color:#9aa4b8}.hero-shortcuts a{color:#627294;font-weight:700;border:1px solid #e8eafa;background:#ffffffab;padding:5px 10px;border-radius:20px}.hero-shortcuts a:hover{border-color:#aeb7ff;color:#4657e9}.hero-trust{display:flex;align-items:center;gap:16px;font-size:10px;color:#8a95ac;margin-top:46px}.hero-trust strong{color:#415076}.avatar-stack{display:flex;padding-left:4px}.avatar-stack span{width:32px;height:32px;border:3px solid #fff;margin-left:-5px;display:grid;place-items:center;border-radius:50%;font-size:10px;font-weight:900;color:#5967b2;background:#e7e6ff}.avatar-stack span:nth-child(2){background:#ffebda;color:#d9884d}.avatar-stack span:nth-child(3){background:#d9f6eb;color:#3b9b84}.hero-art{position:relative;height:550px;display:grid;place-items:center;isolation:isolate}.orbit{position:absolute;border:1px dashed #c9d1f9;border-radius:50%;z-index:-1}.orbit-a{width:520px;height:520px;transform:rotate(-20deg)}.orbit-b{width:420px;height:420px;transform:rotate(20deg)}.floating-star{position:absolute;color:#ffc26a;font-size:38px;animation:bob 4s ease-in-out infinite}.st-a{left:12%;top:12%}.st-b{right:7%;bottom:16%;font-size:31px}.learning-board{position:relative;width:389px;height:389px;transform:rotate(5deg);border:1px solid #e7e8f3;background:#fff;border-radius:27px;box-shadow:0 40px 80px #4553bb22,0 8px 16px #4f5ad70e;padding:22px;display:flex;flex-direction:column;gap:14px}.board-top{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#b4bdd1}.board-badge{font-weight:900;color:#606cd7;letter-spacing:1.2px}.bullet-icon{color:#faab72}.board-top-icons{letter-spacing:3px}.board-heading{display:flex;align-items:center;justify-content:space-between;font-weight:900;font-size:19px;letter-spacing:-.7px}.board-heading span{color:#ffba72}.study-sticky{position:relative;border-radius:15px;padding:17px 20px;overflow:hidden}.st-purple{background:#edebff;min-height:114px}.st-yellow{background:#fff3d5;min-height:105px}.st-eyebrow{display:block;font-size:9px;font-weight:900;letter-spacing:1.2px;color:#8990bd;margin-bottom:9px}.study-sticky strong{font-size:17px;line-height:1.4;display:block;letter-spacing:-.7px}.st-purple strong{color:#5554ba}.st-purple i{position:absolute;right:15px;top:48px;font-family:Georgia,serif;color:#a9a2ea;font-size:33px;font-weight:700;transform:rotate(-10deg)}.st-yellow strong{color:#a57d49;font-size:15px}.round-arrow{position:absolute;right:15px;bottom:20px;font-size:21px;color:#d8a044}.board-bottom{display:flex;gap:12px;align-items:center;margin-top:auto}.board-book{background:#edf7f4;color:#5ab398;display:grid;place-items:center;border-radius:10px;width:40px;height:40px;font-size:23px}.board-bottom b,.board-bottom small{display:block}.board-bottom b{font-size:10px}.board-bottom small{font-size:9px;color:#a7aebe;margin-top:3px}.checkmark{margin-left:auto;border-radius:50%;width:27px;height:27px;display:grid;place-items:center;background:#d5f4e9;color:#3eb695}.float-mini{position:absolute;display:flex;align-items:center;gap:11px;box-shadow:0 16px 38px #5f6bba20;background:#fff;border:1px solid #eff0fc;border-radius:17px;padding:11px 15px;z-index:2;animation:bob 3.5s ease-in-out infinite}.card-rewards{left:0;bottom:92px;transform:rotate(-8deg)}.card-rewards>span{display:grid;place-items:center;width:33px;height:33px;border-radius:10px;background:#ffebcf;color:#ec9d46}.float-mini b,.float-mini small{display:block}.float-mini b{font-size:10px}.float-mini small{font-size:10px;color:#a1acc2}.card-heart{right:-10px;top:80px;color:#f36d98;font-size:22px;animation-delay:1s}.card-heart span{color:#7a82a4;font-size:10px;font-weight:800}@keyframes bob{0%,100%{translate:0 0}50%{translate:0 -9px}}.mini-stats{display:flex;justify-content:space-between;align-items:center;padding:33px 40px;background:#fff;border:1px solid #edf0fa;border-radius:18px;box-shadow:0 18px 45px #5461b00a;margin-top:-27px;position:relative;z-index:3}.mini-stats>div{display:flex;align-items:center;gap:15px}.mini-stats strong,.mini-stats small{display:block}.mini-stats strong{font-size:12px;font-weight:900}.mini-stats small{font-size:10px;color:#9ba4ba;margin-top:4px}.stat-ic{width:43px;height:43px;display:grid;place-items:center;font-size:24px;border-radius:13px}.stat-ic.violet{background:#f1edff;color:#8d78ea}.stat-ic.orange{background:#fff0dc;color:#f0a657}.stat-ic.green{background:#e5faf1;color:#59bea0}.stats-line{height:37px;width:1px;background:#eceef6}.section{padding-top:96px;padding-bottom:85px}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:33px}.kicker{font-size:10px;letter-spacing:2px;color:#5b6bf0;font-weight:900}.section-heading h2{font-size:30px;line-height:1.35;letter-spacing:-1.4px;margin:8px 0 9px;font-weight:900}.section-heading p{color:#8c97ac;font-size:12px;margin:0}.heading-doodle{color:#ffbb62;font-size:20px}.text-link{color:#5363e6;font-weight:800;font-size:11px;white-space:nowrap;padding-bottom:5px}.text-link span{font-size:17px;margin-left:5px}.grade-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.grade-card{height:245px;border-radius:21px;position:relative;overflow:hidden;padding:24px;isolation:isolate;transition:transform .2s,box-shadow .2s}.grade-card:hover{transform:translateY(-6px);box-shadow:0 18px 30px #4053b225}.grade-10{background:linear-gradient(125deg,#e9e9ff,#eeeaff);color:#6461ce}.grade-11{background:linear-gradient(125deg,#e2f7ec,#e9fcf3);color:#3cac84}.grade-12{background:linear-gradient(125deg,#fff0df,#ffe9d7);color:#db9a57}.grade-top{font-size:9px;font-weight:900;letter-spacing:1.2px;opacity:.83}.grade-giant{position:absolute;right:16px;top:14px;font-size:140px;line-height:1;font-weight:900;letter-spacing:-12px;opacity:.16;z-index:-1}.grade-content{position:absolute;bottom:24px;left:24px}.grade-content>span{font-size:10px;font-weight:800}.grade-content strong{display:block;font-size:31px;color:#252c54;letter-spacing:-1.6px;line-height:1.3;margin-top:3px}.grade-content small{color:#68718c;font-size:10px;font-weight:700;display:block;margin-top:9px}.grade-content small span{font-size:16px}.grade-abstract{position:absolute;right:-48px;bottom:-70px;border:25px solid currentColor;width:180px;height:180px;border-radius:47px;transform:rotate(35deg);opacity:.12}.shape-11{border-radius:50%;transform:none}.shape-12{border-radius:34px;transform:rotate(15deg)}.subject-section{background:#f8faff;padding:85px 0 94px}.subject-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.subject-card{background:#fff;border:1px solid #eff0f8;border-radius:17px;min-height:147px;padding:21px 16px;transition:.2s;display:flex;flex-direction:column;align-items:flex-start}.subject-card:hover{transform:translateY(-5px);box-shadow:0 15px 30px #3447b60d;border-color:#dce1ff}.subject-icon{height:48px;width:48px;border-radius:14px;display:grid;place-items:center;font-size:23px;margin-bottom:14px}.subject-card strong{font-weight:800;font-size:12px}.subject-card small{font-size:9px;color:#a2acc1;margin-top:4px}.subject-arrow{margin-left:auto;color:#adb7d2;margin-top:-19px;font-size:18px}.popular-section{padding-top:90px}.hot-emoji{color:#ffb469}.filter-tabs{display:flex;gap:8px;margin:0 0 25px}.filter-tabs button{border-radius:9px;border:1px solid #eceef8;color:#7d88a4;background:#fff;padding:10px 18px;font-weight:800;font-size:11px;transition:.2s}.filter-tabs button:hover,.filter-tabs button.selected{color:#fff;border-color:#5363f1;background:#5363f1}.document-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:19px}.doc-card{min-width:0;border-radius:17px;overflow:hidden;border:1px solid #eff0f8;background:white;transition:transform .22s,box-shadow .22s;cursor:pointer;position:relative}.doc-card:hover{transform:translateY(-5px);box-shadow:0 20px 45px #51619e1c}.doc-cover{height:151px;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}.doc-cover-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}.doc-cover:after{content:'';position:absolute;width:190px;height:190px;border-radius:50%;border:26px solid rgba(255,255,255,.16);right:-94px;bottom:-110px}.doc-cover:before{content:'';position:absolute;width:105px;height:105px;border-radius:32px;background:rgba(255,255,255,.13);left:-50px;top:-45px;transform:rotate(23deg)}.doc-cover-symbol{font-size:43px;font-weight:900;color:rgba(255,255,255,.85);letter-spacing:-2px;position:relative;z-index:1}.doc-cover .demo-ribbon{position:absolute;right:10px;top:11px;background:rgba(255,255,255,.9);border-radius:20px;color:#677399;font-size:9px;font-weight:900;padding:4px 9px;z-index:2}.doc-content{padding:17px 17px 16px}.doc-tags{display:flex;gap:7px;align-items:center}.doc-tags span{background:#f3f5ff;color:#6573a0;border-radius:6px;padding:5px 7px;font-size:9px;font-weight:800}.doc-title{font-size:12px;font-weight:800;line-height:1.65;margin:11px 0;min-height:58px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.doc-meta{border-top:1px solid #f1f2f8;display:flex;justify-content:space-between;align-items:center;padding-top:12px;color:#9ca6b9;font-size:10px}.doc-meta strong{color:#5d6ae0;font-weight:900}.popular-more{text-align:center;margin-top:33px}.outline-btn{border:1px solid #dde1fc;border-radius:12px;padding:13px 22px;display:inline-flex;gap:15px;align-items:center;font-size:11px;font-weight:900;color:#5565ed}.outline-btn:hover{background:#f3f5ff}.loading-cards{grid-column:1/-1;text-align:center;padding:65px;color:#8c98b0}.cta-section{padding-bottom:95px}.cta-panel{min-height:290px;border-radius:23px;background:linear-gradient(105deg,#414fd8,#6f71ec);color:white;overflow:hidden;position:relative;display:flex;align-items:center;padding:45px 62px;isolation:isolate}.cta-panel:after{content:'';position:absolute;width:380px;height:380px;border-radius:50%;border:70px solid rgba(255,255,255,.06);right:-130px;top:-120px;z-index:-1}.cta-label{font-size:9px;letter-spacing:2px;color:#d8dcff;font-weight:900}.cta-panel h2{font-size:29px;letter-spacing:-1.2px;line-height:1.55;margin:9px 0}.cta-panel p{font-size:11px;color:#daddff;margin-bottom:22px}.cta-button{background:#fff;color:#4958d7;padding:13px 19px;border-radius:10px;font-size:11px;font-weight:900;display:inline-flex;gap:24px}.cta-button span{font-size:16px}.cta-drawing{margin-left:auto;align-self:stretch;width:285px;position:relative}.draw-book{position:absolute;font-size:118px;right:24px;top:50px;transform:rotate(-12deg);filter:drop-shadow(0 15px 20px #303ba459)}.draw-square{position:absolute;top:10px;left:16px;transform:rotate(-15deg);background:#ffe7b5;color:#e19c37;display:grid;place-items:center;width:85px;height:85px;border-radius:17px;font-size:35px;font-weight:900;z-index:2}.draw-spark{position:absolute;right:4px;top:0;font-size:50px;color:#ffdb8c}.cta-decor{position:absolute;font-size:70px;right:42%;bottom:-52px;color:#ffffff30}.footer{background:#161e3d;color:#aab3ce}.footer-main{display:grid;grid-template-columns:2.5fr 1fr 1fr;gap:55px;padding:65px 0 55px}.footer .brand-copy strong{color:#fff}.footer-brand{min-width:0}.footer-main p{font-size:11px;line-height:2;max-width:310px;margin:19px 0}.footer-main>div:not(:first-child){display:flex;flex-direction:column;gap:13px}.footer-main>div>strong{font-size:12px;color:white;margin-bottom:8px}.footer-main a:not(.brand){font-size:11px}.footer-main a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid #ffffff1a;padding:23px 0;font-size:10px}.footer-bottom a{color:#a7b7ff;font-weight:900}.doc-dialog{border:0;border-radius:20px;box-shadow:0 30px 90px #121b4260;width:min(530px,calc(100% - 28px));padding:0;max-height:88vh;color:var(--ink)}.doc-dialog::backdrop{background:#1a214dc7;backdrop-filter:blur(5px)}.modal-close{position:absolute;right:15px;top:13px;width:35px;height:35px;border-radius:10px;background:#f0f2fa;border:0;font-size:23px;z-index:1}.doc-dialog-inner{padding:30px}.modal-tag{display:inline-block;color:#6271e5;background:#eef1ff;padding:6px 10px;border-radius:6px;font-size:10px;font-weight:900}.doc-dialog h3{font-size:21px;line-height:1.5;margin:15px 0}.doc-dialog p{color:#74809d;font-size:12px;line-height:1.85}.modal-detail{display:flex;gap:9px;flex-wrap:wrap;margin:20px 0}.modal-detail span{background:#f4f6fb;border-radius:7px;padding:8px 12px;font-size:11px}.modal-action{display:inline-flex;background:#5365ef;border-radius:10px;color:white;padding:12px 16px;font-size:12px;font-weight:900}.modal-disabled{display:block;color:#987a42;background:#fff5dc;padding:12px;border-radius:9px;font-size:11px;font-weight:700}.join-notice{position:fixed;z-index:100;top:14px;left:50%;width:min(590px,calc(100% - 24px));transform:translateX(-50%);border-radius:17px;background:linear-gradient(110deg,#4257dc,#6754d9);color:#fff;overflow:hidden;box-shadow:0 20px 65px #222b7f61;opacity:1;transition:transform .5s ease,opacity .5s ease;isolation:isolate}.join-notice.out{transform:translate(-50%,calc(-100% - 30px));opacity:0;pointer-events:none}.join-notice-inner{display:flex;align-items:center;gap:14px;padding:15px 45px 16px 18px}.join-notice-symbol{width:42px;height:42px;display:grid;place-items:center;background:#ffffff22;border-radius:13px;font-size:22px;flex-shrink:0}.join-notice-content{min-width:0;flex:1}.join-notice-content strong{display:block;font-size:12px;font-weight:900}.join-notice-content span{font-size:10px;color:#e3e4ff}.join-notice-go{font-size:10px;font-weight:900;background:#fff;color:#4a58df;padding:10px 11px;border-radius:9px;white-space:nowrap}.join-notice-close{position:absolute;right:9px;top:7px;color:#e8eaff;border:0;background:none;font-size:21px;padding:2px 5px}.join-progress{height:4px;background:#ffffff40}.join-progress-fill{height:100%;width:100%;background:#ffd577;transform-origin:left;animation:countdown var(--duration,7s) linear forwards}@keyframes countdown{to{transform:scaleX(0)}}
/* Library */.library-page{min-height:65vh;background:#f8faff;padding:70px 0 92px}.library-head{background:linear-gradient(115deg,#4d5eee,#7b70eb);color:white;border-radius:24px;padding:45px 50px;position:relative;overflow:hidden}.library-head:after{content:'✳';position:absolute;right:90px;top:-55px;font-size:250px;color:#ffffff14;line-height:1}.library-head .kicker{color:#f6d8ad}.library-head h1{font-size:37px;letter-spacing:-1.8px;position:relative;margin:9px 0}.library-head p{font-size:12px;color:#e9eaff;position:relative;max-width:540px}.library-bar{display:flex;gap:13px;flex-wrap:wrap;margin:26px 0 16px}.library-bar label{font-size:10px;color:#8b96b1;font-weight:800;display:block;margin-bottom:6px}.library-bar .field{flex:1;min-width:140px}.library-bar .search-field{flex:2;min-width:250px}.library-bar select,.library-bar input{border:1px solid #e8eafa;background:white;border-radius:11px;padding:12px 14px;outline:0;width:100%;font-size:12px;color:#54607e}.library-row{display:flex;justify-content:space-between;margin:18px 0;color:#8a94ac;font-size:11px}.library-row b{color:#4c5add}.empty-docs{grid-column:1/-1;padding:65px 25px;border:1px dashed #cfd5eb;border-radius:18px;text-align:center;color:#8490a6}.empty-docs b{display:block;color:#596582;font-size:15px}.empty-docs span{font-size:11px}.no-results{grid-column:1/-1;text-align:center;padding:50px;color:#8a93ae;font-size:12px}
@media(max-width:1050px){.desktop-nav{gap:17px}.hero-art{scale:.86;transform-origin:center}.hero-grid{grid-template-columns:54% 46%}.brand{min-width:205px}.subject-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.subject-card{padding:17px 12px}}
@media(max-width:800px){.desktop-nav{display:none}.menu-toggle{display:flex}.mobile-nav{position:absolute;top:90px;left:0;right:0;background:white;box-shadow:0 20px 28px #29387e1a;padding:15px 24px;flex-direction:column;gap:2px}.mobile-nav.open{display:flex}.mobile-nav a{padding:11px 9px;font-size:13px;font-weight:750}.hero-grid{grid-template-columns:1fr;min-height:0}.hero-copy{padding:65px 0 15px}.hero-art{height:450px;scale:.8}.hero h1{font-size:48px}.mini-stats{margin-top:0}.subject-grid{grid-template-columns:repeat(3,1fr)}.document-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-main{grid-template-columns:2fr 1fr 1fr;gap:25px}.cta-drawing{width:170px}.draw-book{right:-25px;font-size:98px}.draw-square{left:0}}
@media(max-width:600px){.container{width:calc(100% - 32px)}.site-header{height:74px}.mobile-nav{top:74px}.brand-icon{width:41px;height:41px}.brand-icon svg{width:27px;height:27px}.brand-copy strong{font-size:13px}.brand-copy small{font-size:9px}.brand{min-width:0}.header-library{padding:10px 11px;font-size:0;gap:0}.header-library svg{width:21px;height:21px}.header-library span{display:none}.nav-actions{gap:8px}.hero-copy{padding:47px 0 3px}.eyebrow{font-size:8px;letter-spacing:.7px}.hero h1{font-size:39px;letter-spacing:-1.9px;margin:21px 0 13px}.hero-subtitle{font-size:12px;line-height:1.85;margin-bottom:22px}.hero-search{padding:6px 6px 6px 12px}.hero-search input{font-size:11px}.hero-search button{font-size:0;padding:12px 13px}.hero-search button span{font-size:21px}.hero-shortcuts{font-size:9px}.hero-trust{margin-top:24px}.hero-art{height:330px;scale:.69;transform-origin:center top;align-items:start;padding-top:5px}.learning-board{margin:0}.mini-stats{padding:17px 16px;display:grid;grid-template-columns:1fr 1fr;gap:16px;border-radius:16px}.mini-stats>div{gap:9px}.mini-stats strong{font-size:10px}.mini-stats small{font-size:9px}.mini-stats>div:last-child{grid-column:1/-1}.stats-line{display:none}.stat-ic{width:37px;height:37px;font-size:20px}.section{padding:68px 0 64px}.section-heading{align-items:start}.section-heading h2{font-size:23px;letter-spacing:-.8px}.section-heading p{font-size:10px;line-height:1.8}.section-heading .text-link{display:none}.grade-grid{grid-template-columns:1fr;gap:12px}.grade-card{height:180px;padding:18px}.grade-giant{font-size:128px;right:25px;top:-5px}.grade-content{left:19px;bottom:18px}.grade-content strong{font-size:27px}.subject-section{padding:66px 0}.subject-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.subject-card{min-height:132px}.subject-icon{height:42px;width:42px;margin-bottom:10px}.subject-card strong{font-size:11px}.popular-section{padding-top:67px}.filter-tabs{overflow:auto;padding-bottom:5px}.filter-tabs button{white-space:nowrap;padding:8px 13px;font-size:10px}.document-grid{gap:11px}.doc-cover{height:105px}.doc-cover-symbol{font-size:32px}.doc-content{padding:11px}.doc-tags span{font-size:8px;padding:3px 6px}.doc-title{font-size:10px;margin:9px 0;min-height:50px}.doc-meta{font-size:9px;padding-top:9px}.cta-section{padding:0 0 67px}.cta-panel{padding:30px 23px;min-height:0}.cta-panel h2{font-size:21px}.cta-panel p{font-size:10px}.cta-drawing{display:none}.footer-main{grid-template-columns:1fr 1fr;gap:25px;padding:45px 0 30px}.footer-main>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column;gap:7px}.join-notice-inner{gap:8px;padding:12px 35px 13px 12px}.join-notice-symbol{width:35px;height:35px;font-size:18px}.join-notice-content strong{font-size:10px}.join-notice-content span{font-size:9px}.join-notice-go{font-size:9px;padding:8px 7px}.library-page{padding:30px 0 60px}.library-head{padding:30px 24px;border-radius:19px}.library-head h1{font-size:26px}.library-head p{font-size:11px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;transition-duration:.01ms!important}}


/* V2 - entrances and motion-first interactions (GPU friendly) */
.join-notice{transform:translate(-50%,calc(-100% - 32px));opacity:0;transition:transform .68s cubic-bezier(.18,.9,.27,1.1),opacity .4s ease;will-change:transform,opacity}
.join-notice.is-visible{transform:translate(-50%,0);opacity:1}
.join-notice.is-exiting,.join-notice.out{transform:translate(-50%,calc(-100% - 32px));opacity:0;pointer-events:none;transition:transform .58s cubic-bezier(.7,0,.75,.22),opacity .45s ease}
.join-progress-fill{animation-play-state:paused}
.join-notice.is-counting .join-progress-fill{animation-play-state:running}
.join-notice-go{transition:transform .22s ease,box-shadow .22s ease}
.join-notice-go:hover{transform:translateY(-2px);box-shadow:0 5px 20px #24318b30}
.fx-ready .fx-item.fx-observed:not(.fx-seen){opacity:0;transform:translateY(23px) scale(.985)}
.fx-ready .fx-item{transition:opacity .65s ease var(--fx-delay,0ms),transform .7s cubic-bezier(.2,.8,.2,1) var(--fx-delay,0ms)}
.fx-ready .fx-item.fx-seen{opacity:1;transform:none}
.fx-ready .grade-card.fx-seen:hover,.fx-ready .doc-card.fx-seen:hover{transform:translateY(-6px)}
.subject-card,.doc-card,.grade-card{will-change:auto}
.subject-card:hover .subject-icon{transform:rotate(-5deg) scale(1.08)}
.subject-icon{transition:transform .3s ease}
.doc-card:focus-visible{outline:3px solid #6878ff;outline-offset:4px}
.doc-card:hover .doc-cover-img{transform:scale(1.045)}
.doc-cover-img{transition:transform .45s ease}
.hero-art{animation:hero-arrive .95s both}
@keyframes hero-arrive{from{opacity:.1;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}
.doc-content h3.doc-title{font-weight:900;line-height:1.65}
/* Dedicated document SEO detail template */
.document-page{min-height:70vh;background:linear-gradient(135deg,#f7f8ff,#fff 65%);padding:35px 0 100px}
.doc-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:9px;color:#8490a7;font-weight:650;font-size:12px;margin:0 0 30px}
.doc-breadcrumb a:hover{color:#5662de}
.doc-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:36px;align-items:start}
.doc-detail-article,.doc-detail-side{background:white;border:1px solid #e8ebfa;border-radius:23px;box-shadow:0 16px 50px #5664a30d}
.doc-detail-article{padding:38px}
.doc-detail-side{padding:23px;position:sticky;top:115px}
.doc-labels{display:flex;gap:8px;flex-wrap:wrap}
.doc-labels span{border-radius:100px;padding:7px 11px;background:#edf0ff;color:#5866d9;font-size:11px;font-weight:800}
.doc-detail-article h1{font-size:clamp(26px,3.2vw,42px);letter-spacing:-1.3px;line-height:1.35;margin:20px 0}
.doc-detail-intro{font-size:15px;line-height:2;color:#626f89;white-space:pre-line}
.doc-detail-cover{max-width:100%;max-height:430px;object-fit:contain;border-radius:16px;border:1px solid #edf0fa;margin:20px 0 7px}
.doc-detail-article h2{font-size:21px;letter-spacing:-.6px;margin-top:29px}
.doc-detail-action{display:flex;justify-content:center;align-items:center;background:#5263ef;color:white;font-size:13px;font-weight:900;border-radius:13px;padding:15px 19px;gap:12px;transition:transform .2s,background .2s}
.doc-detail-action:hover{background:#374ade;transform:translateY(-2px)}
.doc-detail-side h2{font-size:17px;margin:3px 0 15px}
.doc-detail-side p{font-size:12px;color:#7f8ba3;line-height:1.75}
.doc-detail-hr{border:none;border-top:1px solid #edf0fa;margin:23px 0}
.doc-related{margin-top:50px}
.doc-related h2{font-size:22px;margin-bottom:18px}
.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}
.related-item{display:block;background:#fff;border:1px solid #eaedfa;border-radius:14px;padding:18px;transition:transform .25s,box-shadow .25s}
.related-item:hover{transform:translateY(-4px);box-shadow:0 12px 30px #4053ad16}
.related-item strong{display:block;font-size:13px}
.related-item small{color:#7785a1;display:block;margin-top:8px}
.subject-card,.grade-card,.doc-card{transition:transform .25s ease,box-shadow .25s ease}
@media(max-width:800px){.doc-detail-grid{grid-template-columns:1fr}.doc-detail-side{position:static}.document-page{padding-bottom:65px}}
@media(max-width:600px){.doc-detail-article{padding:23px}.doc-detail-side{padding:23px}.related-grid{grid-template-columns:1fr}.doc-breadcrumb{font-size:10px}.join-notice{top:9px}}
@media(prefers-reduced-motion:reduce){.fx-ready .fx-item,.fx-ready .fx-item.fx-observed:not(.fx-seen),.fx-ready .fx-item.fx-seen{opacity:1!important;transform:none!important}.join-notice{will-change:auto}.hero-art{animation:none}}