:root{--deep:#194c43;--ink:#223c35;--muted:#65796f;--line:#dce5dc;--paper:#f7f8f3;--white:#fff;--soft:#eaf0e7;--error:#9c2d26;--warning:#7d551e;--radius:14px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;text-rendering:optimizeLegibility}
*{box-sizing:border-box}body{margin:0;min-height:100vh;display:flex;flex-direction:column;font-size:16px;line-height:1.65}a{color:var(--deep);text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:4px}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}input:disabled{background:#f5f6f2}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #6f9c87;outline-offset:3px}[tabindex="-1"]:focus{outline:none}[hidden]{display:none!important}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.35;color:var(--deep)}h1{font-size:clamp(32px,3.3vw,48px);font-weight:650;letter-spacing:-.035em;margin-bottom:20px}h2{font-size:25px;margin-bottom:10px}h3{font-size:18px}p{margin-bottom:16px}.width{width:min(1160px,calc(100% - 64px));margin-inline:auto}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{display:inline-flex;gap:11px;align-items:center;font-size:22px;font-weight:700;letter-spacing:-.04em}.brand:hover{text-decoration:none}.brand-mark{display:grid;place-items:center;width:36px;height:36px;background:var(--deep);color:#fff;border-radius:7px;font-family:Georgia,serif;font-size:24px;font-weight:400}.site-header nav{display:flex;gap:30px;font-size:14px}.site-header nav a{padding-block:9px}main{flex:1}.skip-link{position:fixed;top:10px;left:10px;z-index:100;background:white;border:2px solid var(--deep);padding:9px 16px;transform:translateY(-150%)}.skip-link:focus{transform:none}.eyebrow{color:var(--deep);font-size:12px;font-weight:700;letter-spacing:.16em;margin:0 0 17px}.entry-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,440px);gap:90px;align-items:start;padding:72px 0 80px}.entry-intro{padding-top:38px}.intro-subtitle{font-size:28px;margin:0 0 14px}.intro-copy{max-width:420px;color:var(--muted);font-size:17px;line-height:1.9}.intro-rule{height:1px;width:70px;background:#a7bcae;margin:38px 0 24px}.intro-note{color:var(--muted);font-size:14px;max-width:350px;line-height:1.9}.form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:0 10px 30px #163f3504}.card-heading{margin-bottom:27px}.card-heading p{font-size:14px;color:var(--muted);line-height:1.8;margin:0}.field{margin-bottom:21px}.field label{display:block;font-size:14px;font-weight:600;margin-bottom:8px}.field input{display:block;width:100%;height:49px;border:1px solid #bdcbbc;border-radius:7px;padding:10px 13px;color:var(--ink);background:white;line-height:1.4;font-size:16px;min-width:0}.field input[aria-invalid="true"]{border-color:var(--error)}.field input:focus{border-color:var(--deep)}.password-field{position:relative}.password-field input{padding-right:68px}.password-toggle{position:absolute;right:5px;top:5px;min-width:52px;height:39px;border:0;border-radius:4px;color:var(--deep);background:transparent;font-size:13px}.password-toggle:hover{background:var(--soft)}.button{min-height:46px;padding:10px 19px;display:inline-flex;align-items:center;justify-content:center;gap:14px;border-radius:7px;border:1px solid transparent;line-height:1.5;font-size:14px;font-weight:600;text-align:center}.button:hover{text-decoration:none}.button-primary{color:white;background:var(--deep);border-color:var(--deep)}.button-primary:hover:not(:disabled){background:#236353}.button-outline{color:var(--deep);background:#fff;border-color:#bdcbbc}.button-outline:hover:not(:disabled),.button-quiet:hover:not(:disabled){background:var(--soft)}.button-wide{width:100%}.button-quiet{background:transparent;color:var(--muted);margin-top:10px}.form-help{margin:22px 0 0;padding-top:20px;border-top:1px solid var(--line);font-size:13px;line-height:1.8;color:var(--muted)}.form-error{color:var(--error);font-size:14px;padding:11px 13px;background:#fcf1ef;border:1px solid #f1d7d0;border-radius:6px;overflow-wrap:anywhere}.account-context{font-size:14px;color:var(--deep);margin-top:24px;overflow-wrap:anywhere}.password-grid{padding-top:48px}.password-grid .entry-intro{padding-top:27px}.password-grid .field{margin-bottom:18px}.dashboard{padding:50px 0 76px}.dashboard-heading{display:flex;gap:30px;align-items:center;justify-content:space-between}.dashboard-heading h1{font-size:38px;margin-bottom:9px}.dashboard-welcome{color:var(--muted);font-size:16px;margin:0;overflow-wrap:anywhere}.account-actions{display:flex;gap:10px;flex-shrink:0}.identity-strip{display:flex;flex-wrap:wrap;gap:18px 60px;margin:31px 0 34px;padding:23px 27px;background:#eff2eb;border:1px solid var(--line);border-radius:10px}.identity-strip div{display:flex;align-items:baseline;gap:16px;min-width:0}.identity-strip dt{font-size:13px;color:var(--muted);flex-shrink:0}.identity-strip dd{font-size:15px;margin:0;overflow-wrap:anywhere}.learning-grid{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:25px;align-items:start}.panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;min-width:0}.panel-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:23px 28px 19px;border-bottom:1px solid var(--line)}.panel-heading h2{font-size:21px;margin:0}.count-label{font-size:13px;color:var(--muted)}.empty-state{padding:44px 25px 48px;text-align:center}.empty-mark{display:grid;place-items:center;width:66px;height:66px;margin:0 auto 18px;border-radius:50%;background:var(--soft);color:#718d79}.empty-mark svg{width:36px;height:36px}.empty-state h3{font-size:19px;margin:0 0 9px}.empty-state p{font-size:14px;color:var(--muted);margin:0}.course-panel{padding:27px}.course-panel .eyebrow{margin-bottom:15px}.course-panel h2{font-size:29px;margin-bottom:6px}.course-subtitle{color:var(--muted);font-size:16px;margin-bottom:23px}.course-copy{color:var(--muted);font-size:14px;margin-bottom:24px}.course-panel .button{width:100%}.course-footnote{margin:16px 0 0;font-size:12px;color:var(--muted)}.assignment-status{padding:35px 28px;color:var(--muted);font-size:14px}.assignment-status p{margin-bottom:16px}.assignment-list{list-style:none;margin:0;padding:0 28px}.assignment-item{padding:25px 0;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.assignment-item:last-child{border-bottom:0}.assignment-title{font-size:18px;margin:0 0 9px}.assignment-description{font-size:14px;color:var(--muted);white-space:pre-wrap;margin:0 0 12px}.assignment-meta{font-size:12px;color:var(--muted);display:flex;gap:16px;flex-wrap:wrap}.assignment-tag{color:var(--deep)}.notice{margin-top:22px;border:1px solid #c9d9cc;border-radius:7px;background:#edf5ed;color:var(--deep);font-size:14px;padding:13px 17px;overflow-wrap:anywhere}.notice-warning{color:var(--warning);background:#fff7e9;border-color:#ebd9b8}.loading-view,.unavailable-view{min-height:430px;display:flex;align-items:center;justify-content:center;flex-direction:column;padding:60px 0;text-align:center;color:var(--muted)}.loading-view p{margin-top:18px}.unavailable-view h1{font-size:32px}.spinner{display:block;width:30px;height:30px;border:3px solid var(--line);border-top-color:var(--deep);border-radius:50%;animation:spin .8s linear infinite}.footer{border-top:1px solid var(--line);padding-block:23px 28px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:12px}.footer p{margin:0}.noscript{position:fixed;inset:auto 15px 15px;background:#fff7e9;border:1px solid #ebd9b8;color:var(--warning);padding:20px;text-align:center;z-index:10}@keyframes spin{to{transform:rotate(360deg)}}
@media(max-width:950px){.entry-grid{gap:45px;grid-template-columns:minmax(0,1fr) minmax(340px,410px)}.entry-intro{padding-top:30px}.learning-grid{grid-template-columns:minmax(0,1fr) 290px;gap:20px}.identity-strip{gap:15px 32px}}
@media(max-width:720px){.width{width:calc(100% - 40px)}.header-inner{min-height:74px;gap:20px}.brand{font-size:20px}.site-header nav{gap:17px;font-size:12px}.entry-grid{grid-template-columns:1fr;gap:25px;padding:35px 0 44px;max-width:500px;margin-inline:auto}.entry-intro,.password-grid .entry-intro{padding:0}.entry-intro h1{font-size:32px;margin-bottom:13px}.intro-subtitle{font-size:23px;margin-bottom:9px}.intro-copy{font-size:15px;margin:0}.entry-intro .intro-rule,.entry-intro .intro-note{display:none}.eyebrow{font-size:11px;margin-bottom:12px}.form-card{padding:28px}.card-heading{margin-bottom:22px}.account-context{margin:14px 0 0}.dashboard{padding:31px 0 45px}.dashboard-heading{align-items:flex-start;gap:20px;flex-direction:column}.dashboard-heading h1{font-size:32px}.account-actions{width:100%;justify-content:flex-end}.identity-strip{padding:20px;margin:22px 0 25px;flex-direction:column;gap:12px}.identity-strip div{gap:23px}.learning-grid{grid-template-columns:1fr}.course-panel{padding:25px}.course-panel .button{width:auto;min-width:200px}.course-panel .course-copy{margin-bottom:19px}.course-panel .course-subtitle{margin-bottom:15px}.empty-state{padding:32px 20px 36px}.panel-heading{padding:20px 23px 17px}.assignment-list{padding-inline:23px}.footer{font-size:11px;padding-block:21px 24px}.notice{margin-top:17px}}
@media(max-width:390px){.width{width:calc(100% - 30px)}.brand{font-size:18px;gap:8px}.brand-mark{width:30px;height:30px;font-size:21px}.site-header nav{gap:13px;font-size:11px}.form-card{padding:24px}.entry-intro h1{font-size:29px}.account-actions .button{padding-inline:14px}}
@media(prefers-reduced-motion:reduce){.spinner{animation:none;border-color:var(--deep)}}

.learning-links{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 24px}.assignment-item .work-link{display:inline-flex;margin-top:14px;align-items:center;min-height:42px}

/* Always-visible site destinations; teaching permissions remain server-checked. */
.site-header .header-inner{flex-wrap:wrap}.site-header .brand{white-space:nowrap;flex-shrink:0}.site-header nav{flex-wrap:wrap;gap:8px 18px}.site-header nav a{white-space:nowrap}.site-header .site-switcher{margin-left:auto;display:flex;align-items:center;font-size:14px}.site-header .site-switcher a{display:inline-flex;align-items:center;min-height:40px}.site-header #admin-navigation{flex:1;justify-content:flex-end}
@media(max-width:760px){.site-header .header-inner{padding-block:12px;gap:8px 14px}.site-header .brand{font-size:17px}.site-header nav{font-size:12px;gap:5px 14px}.site-header #admin-navigation{flex-basis:100%}}
@media(max-width:390px){.site-header .brand{font-size:16px}.site-header .brand-mark{width:28px;height:28px}.site-header nav{gap:5px 12px}}