:root{--navy:#003d7c;--navy-deep:#092c51;--paper:#f7f5f0;--white:#fffefa;--orange:#ef7c00;--ink:#182c40;--muted:#6e7883;--line:#dedfdc;--serif:"Noto Serif SC","Source Han Serif SC","Songti SC","STSong","SimSun",serif;--sans:"Microsoft YaHei","PingFang SC","Noto Sans SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button,a,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default}input,select{width:100%;min-height:50px;padding:12px 15px;border:1px solid #d2d8de;border-radius:3px;background:var(--white);color:var(--ink);transition:border-color .15s,box-shadow .15s}input::placeholder{color:#8b9199}input:focus,select:focus{border-color:var(--navy);outline:2px solid #003d7c22;outline-offset:1px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.35}h1,h2{font-family:var(--serif)}h1{font-size:46px;letter-spacing:.015em;font-weight:600}h2{font-size:28px}h3{font-size:22px}p{margin-bottom:1em}.muted{color:var(--muted)}.blue{color:var(--navy)}.eyebrow{font-size:12px;font-weight:600;letter-spacing:.17em;margin-bottom:20px}.skip-link{position:fixed;z-index:10;left:15px;top:-70px;background:var(--white);padding:10px 18px;box-shadow:0 2px 8px #0002}.skip-link:focus{top:10px}.site-header{max-width:1440px;margin:0 auto;padding:26px 6.25%;display:flex;align-items:center;justify-content:space-between;gap:30px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:14px;color:var(--navy);font-size:20px;letter-spacing:.04em;font-weight:700;flex-shrink:0}.brand small{display:block;font-size:10px;letter-spacing:.23em;font-weight:400;margin-top:1px}.brand-symbol{width:33px;height:33px;display:flex;align-items:flex-end;gap:4px;transform:skewY(-8deg)}.brand-symbol span{width:8px;background:currentColor;height:27px}.brand-symbol span:nth-child(2){height:33px}.brand-symbol span:nth-child(3){background:var(--orange);height:23px}.account-nav{display:flex;align-items:center;gap:28px;font-size:13px}.account-nav a{position:relative;padding:8px 0;color:#546271}.account-nav a:hover,.account-nav a[aria-current]{color:var(--navy)}.account-nav a[aria-current]:after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--orange)}.account-nav form{margin:0}.text-button{border:0;background:transparent;padding:8px 0;color:var(--navy);font-size:13px}.text-button:hover{text-decoration:underline;text-underline-offset:4px}.text-button span{margin-left:5px}.page-shell{max-width:1240px;margin:0 auto;padding:62px 42px 26px}.site-footer{max-width:1156px;margin:0 auto;padding:26px 0;border-top:1px solid var(--line);color:#7a828a;font-size:11px;letter-spacing:.05em;display:flex;justify-content:space-between;gap:20px}.button{display:inline-flex;align-items:center;justify-content:center;gap:32px;min-height:50px;border:1px solid transparent;border-radius:3px;font-weight:600;font-size:14px;padding:12px 24px;transition:background .16s,transform .16s}.button:hover{transform:translateY(-1px)}.primary{background:var(--navy);color:white}.primary:hover{background:var(--navy-deep)}.secondary{background:var(--white);color:var(--navy);border-color:#9babbb}.secondary:hover{background:#eaf0f5}.button-wide{width:100%;justify-content:space-between}.small{font-size:12px;min-height:38px;padding:8px 14px}.field{display:flex;flex-direction:column;gap:8px}.field label{font-size:13px;font-weight:600}.field small,.reset-form small{font-size:11px;color:var(--muted);line-height:1.6}.stack-form{display:grid;gap:22px}.stack-form>.button{margin-top:8px}.notice{font-size:13px;padding:13px 16px;margin:0 0 25px;border-left:3px solid;line-height:1.7}.error{background:#faece7;color:#9e3925;border-color:#b94c32}.success{background:#eaf0e8;color:#35604b;border-color:#557760}.optional{font-weight:400;color:var(--muted);margin-left:5px}
/* A quiet editorial spread, with a geometrical lesson illustration. */
.login-layout{min-height:100svh;display:grid;grid-template-columns:1.08fr 1fr}.login-story{background:var(--navy);color:#fffdf7;position:relative;overflow:hidden;padding:46px 10% 35px 12%;display:flex;flex-direction:column;min-height:790px}.brand-light{color:white}.story-copy{position:relative;z-index:1;margin-top:85px}.story-copy .eyebrow{font-size:11px;color:#c4d2e2;display:flex;align-items:center;gap:12px}.short-rule{width:24px;height:1px;background:var(--orange)}.story-copy h1{font-size:clamp(36px,3.65vw,58px);line-height:1.45;letter-spacing:.035em;margin-bottom:24px;font-weight:500;white-space:nowrap}.orange-dot{position:relative}.orange-dot:after{content:"";position:absolute;bottom:-9px;left:0;width:44px;height:3px;background:var(--orange)}.story-description{font-size:13px;line-height:2;color:#c5d2e2;margin-top:30px}.story-footnote{font-size:10px;letter-spacing:.09em;color:#a3bdd7;margin:24px 0 0;z-index:1}.academic-art{position:relative;flex:1;min-height:215px;margin-top:34px;max-width:470px}.art-grid{position:absolute;inset:10px 0 26px;background-image:linear-gradient(#fff1 1px,transparent 1px),linear-gradient(90deg,#fff1 1px,transparent 1px);background-size:40px 40px;opacity:.65}.art-orbit{position:absolute;border:1px solid #abc4dc5c;border-radius:50%;height:180px;width:180px;bottom:27px;left:34%}.orbit-two{transform:translateX(44px);border-color:#d9d7c585}.art-bar{position:absolute;bottom:27px;background:#8dacc1;width:42px;border-top:1px solid #dce6ec}.bar-one{height:65px;left:12%;opacity:.5}.bar-two{height:102px;left:25%;opacity:.8}.bar-three{height:149px;left:38%;background:#c0ced7}.art-sun{position:absolute;width:57px;height:57px;border-radius:50%;background:var(--orange);top:9%;left:69%}.art-caption{position:absolute;bottom:0;right:0;font-size:9px;letter-spacing:.2em;color:#a9bfd4}.login-form-section{padding:70px 11%;display:flex;flex-direction:column;justify-content:center;position:relative}.login-form-wrap{max-width:374px;width:100%;margin:0 auto;padding-bottom:40px}.login-form-wrap h2{font-size:38px;font-weight:600;margin-bottom:15px}.form-intro{font-size:13px;line-height:1.8;margin-bottom:38px}.login-form-wrap .eyebrow{font-size:10px;margin-bottom:17px}.login-help{display:flex;gap:12px;border-top:1px solid var(--line);padding-top:25px;margin-top:34px;font-size:12px;color:#4c5c6b;line-height:1.9}.help-symbol{margin-top:3px;width:19px;height:19px;border:1px solid #b4bec8;display:flex;align-items:center;justify-content:center;border-radius:50%;font-family:Georgia,serif;font-size:13px;color:var(--navy)}.login-help p{margin:0}.login-bottom{position:absolute;bottom:28px;left:0;right:0;text-align:center;font-size:10px;letter-spacing:.15em;color:#9a9fa6}
.site-footer{flex-wrap:wrap;gap:8px 20px}.filing-link{font-size:11px;letter-spacing:.03em;white-space:nowrap;color:#6e7883}.filing-link:hover{text-decoration:underline;text-underline-offset:3px}.login-bottom{display:grid;justify-items:center;gap:4px;padding:0 20px}
/* Catalogue */
.catalogue-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;padding-bottom:49px}.catalogue-heading h1{font-size:43px;margin-bottom:20px;font-weight:500}.catalogue-heading .eyebrow{font-size:12px;margin-bottom:20px}.catalogue-heading .muted{font-size:14px;margin-bottom:0}.catalogue-count{border-left:1px solid var(--line);min-width:155px;display:flex;flex-direction:column;align-items:center;padding-left:35px;padding-bottom:3px;margin-bottom:5px}.catalogue-count strong{font-family:Georgia,serif;font-weight:400;font-size:64px;line-height:1.1;color:var(--navy)}.catalogue-count span{font-size:11px;color:var(--muted);margin-top:10px;letter-spacing:.1em}.section-heading{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);padding:23px 0}.section-heading h2{font-family:var(--sans);font-size:16px;margin:0;font-weight:600}.section-heading span{font-size:11px;letter-spacing:.04em;color:var(--muted)}.course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.course-card{border:1px solid #dce0e1;background:var(--white);overflow:hidden;border-radius:4px;transition:transform .22s,box-shadow .22s;animation:arrive .45s both}.course-card:nth-child(2){animation-delay:.08s}.course-card:hover{transform:translateY(-3px);box-shadow:0 12px 25px #102d4b0a}.course-cover{height:235px;background:var(--navy);color:#e6eff5;position:relative;overflow:hidden}.cover-index{position:absolute;left:26px;top:20px;font-size:10px;letter-spacing:.15em;z-index:1;color:#c1d3e4}.cover-subject{position:absolute;left:26px;bottom:19px;font-size:10px;letter-spacing:.1em;opacity:.75}.cover-illustration{display:block;height:100%;width:100%;padding:20px 35px 15px 45px;transform:translateX(18px)}.course-card-island .course-cover{background:#ede6d8;color:var(--navy)}.course-card-island .cover-index{color:#6b7a83}.course-card-island .cover-illustration{padding:12px 22px 20px 35px}.course-body{padding:27px 28px 23px}.course-meta{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:10px;color:var(--muted);margin-bottom:20px}.status-pill{display:inline-flex;align-items:center;gap:7px;color:#42614d;font-size:10px;background:#edf2ea;padding:4px 9px;border-radius:2px;white-space:nowrap}.status-pill>span{display:inline-block;width:5px;height:5px;border-radius:50%;background:#608066}.status-muted{background:#f1eee6;color:#8c7250}.status-muted>span{background:#ac8c62}.course-body h3{font-family:var(--serif);font-size:27px;margin-bottom:11px;font-weight:600}.course-description{font-size:13px;color:#6b7580;line-height:1.9;min-height:50px;margin-bottom:22px;max-width:40em}.course-card-bottom{border-top:1px solid #e5e6e2;padding-top:20px;display:flex;align-items:center;justify-content:space-between;gap:15px}.course-action{color:var(--navy);font-size:13px;font-weight:600;display:flex;align-items:center;gap:28px;padding:5px 0}.course-action span{font-size:21px;font-weight:400;line-height:1}.course-action:hover{text-decoration:underline;text-underline-offset:5px}.course-card-bottom small{font-size:10px;color:#879099;white-space:nowrap}.course-unavailable{font-size:13px;color:#879099;padding:5px 0}.learning-note{display:flex;align-items:center;gap:21px;padding:42px 0 17px;color:var(--navy)}.note-marker{font-size:73px;font-family:Georgia,serif;line-height:.8;color:var(--orange);align-self:flex-start;margin-top:7px}.learning-note p{font-family:var(--serif);font-size:18px;line-height:1.6;margin:0}.learning-note p span{font-family:var(--sans);font-size:11px;color:var(--muted)}.note-rule{height:1px;background:var(--line);flex:1;margin-left:24px}.teacher-links{border-top:1px dashed var(--line);margin-top:15px;padding-top:12px;font-size:11px;color:#677b8d}.teacher-links summary{cursor:pointer}.teacher-links a{display:block;margin-top:10px;color:var(--navy);text-decoration:underline;text-underline-offset:3px}.mobile-break{display:none}.empty-state{padding:40px;border:1px dashed var(--line);grid-column:1/-1;color:var(--muted)}
/* Account management */
.narrow-shell{max-width:650px;padding-top:40px;padding-bottom:70px}.back-link{display:inline-block;font-size:12px;color:var(--navy);margin-bottom:40px}.page-title{font-size:35px;font-weight:500;margin-bottom:17px}.narrow-shell>.muted{font-size:13px;margin-bottom:30px}.form-panel{padding:31px;background:var(--white);border:1px solid var(--line);border-radius:3px}.admin-shell{padding-top:44px;padding-bottom:65px}.admin-heading{display:flex;align-items:center;justify-content:space-between;gap:30px;margin-bottom:28px}.admin-heading .muted{font-size:13px}.admin-count{font-size:12px;color:var(--muted);border:1px solid var(--line);padding:8px 14px;white-space:nowrap}.admin-layout{display:grid;grid-template-columns:330px 1fr;gap:38px;align-items:start}.panel-heading{display:flex;align-items:center;gap:13px;margin-bottom:26px}.panel-heading h2{font-family:var(--sans);font-size:17px;font-weight:600;margin:0}.panel-number{font-family:Georgia,serif;font-size:13px;color:var(--orange);border-bottom:1px solid var(--orange)}.create-user-panel{padding:27px}.create-user-panel .stack-form{gap:18px}.create-user-panel .field{gap:6px}.create-user-panel input,.create-user-panel select{min-height:45px;font-size:13px;padding:10px 12px}.create-user-panel .field small{font-size:10px}.user-list-panel{padding-top:23px}.user-row{border-top:1px solid var(--line);padding:23px 0 17px}.user-row-top{display:flex;align-items:center;justify-content:space-between;gap:20px}.user-identity{display:flex;align-items:center;gap:13px;min-width:0}.user-avatar{width:41px;height:41px;border:1px solid #cbd6df;background:#e9eef2;display:flex;align-items:center;justify-content:center;flex-shrink:0;color:var(--navy);font-family:var(--serif);font-size:18px}.user-identity h3{font-family:var(--sans);font-size:14px;font-weight:600;margin:0 0 5px;overflow-wrap:anywhere}.user-identity h3 small{font-size:9px;font-weight:400;color:#83909c;margin-left:9px}.user-identity p{font-size:11px;margin:0;color:#637586;overflow-wrap:anywhere}.user-identity p span{color:#90979f;margin-left:8px}.user-actions{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;margin:13px 0 0 54px;font-size:11px}.user-actions .text-button{padding:0;font-size:11px;white-space:nowrap}.user-actions form{margin:0}.reset-password{flex:1}.reset-password summary{cursor:pointer;color:var(--navy);display:list-item;width:fit-content}.reset-form{display:grid;gap:10px;padding:16px;margin-top:13px;background:#f0f2f2;border:1px solid #e0e4e7;max-width:360px}.reset-form input{font-size:12px;min-height:42px;padding:9px 12px}.reset-form .button{justify-self:start}.danger-text{color:#9c5144}.user-disabled .user-avatar{color:#858585;background:#eae9e5;border-color:#dedcd5}.error-page{min-height:65vh;max-width:750px;margin:0 auto;padding:90px 30px;text-align:center}.error-page h1{font-size:37px}.error-page .muted{font-size:14px;line-height:1.9;margin-bottom:28px}
.trial-notice{background:#fff0dc;color:#714a20;border-color:var(--orange)}.user-actions{flex-wrap:wrap}.user-actions>.reset-password{min-width:110px}
@keyframes arrive{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1550px){.login-story{padding-left:18%;padding-right:12%}.login-form-section{padding-left:16%;padding-right:16%}.story-copy{margin-top:110px}}
@media(max-width:1000px){.site-header{padding:24px 34px}.account-nav{gap:19px}.page-shell{padding-left:34px;padding-right:34px}.site-footer{margin:0 34px}.login-story{padding-left:10%;padding-right:8%;min-height:750px}.story-copy h1{font-size:36px}.login-form-section{padding:60px 10%}.course-grid{gap:22px}.course-body{padding:23px}.course-card-bottom small{display:none}.course-cover{height:215px}.catalogue-heading h1{font-size:38px}.admin-layout{grid-template-columns:300px 1fr;gap:25px}.user-identity h3 small{display:block;margin:3px 0 0}}
@media(max-width:760px){.site-header{padding:19px 23px;flex-wrap:wrap;gap:18px}.brand{font-size:18px;gap:12px}.brand small{font-size:9px}.brand-symbol{width:28px;height:28px;gap:3px}.brand-symbol span{width:7px;height:23px}.brand-symbol span:nth-child(2){height:28px}.brand-symbol span:nth-child(3){height:20px}.account-nav{width:100%;gap:24px;font-size:12px;justify-content:flex-start;border-top:1px solid var(--line);padding-top:8px}.account-nav form{margin-left:auto}.account-nav .text-button{font-size:12px}.page-shell{padding:36px 23px 24px}.site-footer{margin:0 23px;padding:21px 0;font-size:10px}.catalogue-heading{padding-bottom:32px;gap:20px}.catalogue-heading h1{font-size:31px;line-height:1.5;margin-bottom:14px}.catalogue-heading .eyebrow{font-size:10px;margin-bottom:15px}.catalogue-heading .muted{font-size:12px}.mobile-break{display:block}.catalogue-count{min-width:74px;padding-left:17px;margin-bottom:7px}.catalogue-count strong{font-size:43px}.catalogue-count span{font-size:9px;letter-spacing:0}.section-heading{padding:19px 0}.section-heading h2{font-size:14px}.section-heading span{font-size:9px}.course-grid{grid-template-columns:1fr;gap:24px}.course-cover{height:225px}.course-body{padding:23px}.course-body h3{font-size:25px}.course-description{min-height:0;font-size:12px;margin-bottom:18px}.course-meta{margin-bottom:17px}.course-card-bottom{padding-top:16px}.course-card-bottom small{display:block;font-size:9px}.learning-note{padding:34px 0 12px;gap:15px}.learning-note p{font-size:16px}.learning-note p span{font-size:10px}.note-rule{margin-left:0}.note-marker{font-size:60px}.login-layout{grid-template-columns:1fr;min-height:100svh}.login-story{min-height:auto;padding:29px 28px 31px}.story-copy{margin-top:35px}.story-copy .eyebrow{font-size:9px;margin-bottom:14px}.story-copy h1{font-size:32px;line-height:1.35;margin-bottom:0}.story-copy h1 br{display:none}.story-copy h1 .orange-dot{display:block}.story-description{font-size:11px;margin-top:22px;margin-bottom:0;line-height:1.8;position:relative;z-index:1}.story-footnote{display:none}.academic-art{position:absolute;width:180px;height:150px;min-height:0;right:-40px;bottom:5px;opacity:.2;transform:scale(.9);pointer-events:none}.art-orbit{width:110px;height:110px;left:26%}.art-caption{display:none}.art-bar{width:24px}.bar-three{height:110px}.art-sun{width:35px;height:35px}.login-form-section{padding:36px 29px 45px}.login-form-wrap{max-width:460px;padding-bottom:25px}.login-form-wrap h2{font-size:29px;margin-bottom:9px}.login-form-wrap .eyebrow{display:none}.form-intro{font-size:12px;margin-bottom:25px}.login-form-wrap .stack-form{gap:18px}.login-help{margin-top:24px;padding-top:21px;font-size:11px}.login-bottom{font-size:9px;bottom:13px}.narrow-shell{padding-top:28px;padding-bottom:45px}.back-link{margin-bottom:26px}.page-title{font-size:28px}.form-panel{padding:24px}.admin-heading{align-items:flex-start;gap:12px}.admin-heading .eyebrow{font-size:10px;margin-bottom:14px}.admin-count{font-size:10px;padding:6px 8px;margin-top:3px}.admin-heading .muted{font-size:12px}.admin-layout{grid-template-columns:1fr;gap:20px}.user-list-panel{padding-top:8px}.user-row{padding-top:20px}.user-identity h3 small{display:inline;margin-left:7px}.user-actions{margin-left:0;padding-left:54px}.error-page{padding-top:65px}.error-page h1{font-size:29px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}