/* A consistent reading scale, independent of external font services. */
:root{font-size:100%;--navy:#14253e;--blue:#245dcc;--muted:#52647b;--line:#dce3ec;color-scheme:light}
body{font:1rem/1.65 'Segoe UI',Arial,sans-serif;color:#20324a;background:#f3f6fa}
h1,h2,h3,.brand{font-family:inherit;line-height:1.25;font-weight:700}
h1{font-size:clamp(1.85rem,2.6vw,2.5rem);margin:12px 0;letter-spacing:-.035em;overflow-wrap:anywhere}h2{font-size:1.65rem}h3{font-size:1.25rem;margin-bottom:20px}
p{line-height:1.7}button,.primary,.secondary{min-height:46px;line-height:1.4;padding:11px 18px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-size:1rem;font-weight:600}
.primary{background:var(--blue)}.primary:hover{background:#1948a5}.secondary{background:#eef4ff;color:#204eaa;border-color:#cad9f3}.secondary:hover{background:#dfeaff}.quiet{color:#405675}.quiet:hover{background:#edf2f8}.danger{color:#a1253c;border:1px solid #f2ced6}
:where(a,button,input,select,textarea,summary):focus-visible{outline:3px solid #2563eb;outline-offset:4px}
.eyebrow{font-size:.8125rem;line-height:1.5;letter-spacing:.085em;color:#4d6382}.muted{color:var(--muted)}
.sidebar{width:264px;background:var(--navy);background-image:radial-gradient(ellipse at top left,#26415f 0,transparent 70%);padding:34px 20px;display:flex;flex-direction:column;overflow-y:auto;color:#e2eaf6}
.brand{font-size:1.35rem;letter-spacing:-.035em}.sidebar .brand{padding:0 10px;color:#fff}.school{font-size:.875rem;color:#bccbde;margin:10px 0 38px 10px}
.nav-label{font-size:.8125rem;font-weight:600;letter-spacing:.075em;color:#b4c3d9}.nav{padding:14px 16px;border:1px solid transparent;border-radius:10px;font-weight:600}.nav:hover{background:#ffffff0d}.nav.active{background:#304c73;border-color:#4b6d9c;box-shadow:inset 3px 0 #9dc1ff}
.sidebar-bottom{position:static;margin-top:auto;padding:40px 12px 0;font-size:.875rem;color:#bac9dc}.sidebar-bottom p{margin:6px 0 0 16px}.dot{width:8px;height:8px;background:#69ddba}
.workspace{margin-left:264px}header{height:auto;min-height:96px;padding:18px 40px;gap:20px;flex-wrap:wrap;color:var(--muted)}header>span{font-weight:600}.header-tools{display:flex;align-items:center;gap:24px;flex-wrap:wrap}
.profile{font-size:.9375rem;gap:12px}.profile small{font-size:.8125rem;color:var(--muted)}.avatar{width:44px;height:44px;flex-shrink:0;border:1px solid #d1def4;color:#244fa5;font-size:1.125rem}
.reading-tools{display:flex;align-items:center;gap:5px}.reading-label{color:var(--muted);font-size:.875rem;margin-right:5px}.reading-tools button{min-width:44px;padding:8px;background:#f4f7fc;border:1px solid var(--line);color:#29476e;font-size:.9375rem}.reading-tools button:hover,.reading-tools button[aria-pressed="true"]{background:#e5eeff;border-color:#9ebced;color:#17439c}
.content{max-width:1480px;padding:40px;min-height:calc(100vh - 155px)}.page-title{margin-bottom:30px;gap:20px}.page-title p{max-width:65ch}.badge{font-size:.875rem;padding:8px 12px;border:1px solid #dce5f1;border-radius:8px;color:#425c7c;white-space:normal;display:inline-block;background:#edf2f9}
.welcome{background:linear-gradient(115deg,#e9f0ff,#f2f7ff);border-color:#d3e0f6;border-radius:16px;padding:32px 36px;gap:20px;margin-bottom:36px;position:relative}.welcome:before{content:'';position:absolute;inset:0 auto 0 0;width:4px;background:#4974c8}.welcome h2{font-size:1.65rem;margin:12px 0}.welcome p{color:#435d81;max-width:60ch}.welcome-art{color:#456eba;padding:0 25px;margin:0}
.section-heading{gap:20px;margin-bottom:24px;flex-wrap:wrap}.section-heading h2,.section-heading h3{margin:0}.section-heading>.muted{font-size:.9375rem}
.course-grid{grid-template-columns:repeat(auto-fit,minmax(min(100%,310px),1fr));gap:26px}.course-card{min-width:0;border-radius:16px;box-shadow:0 6px 22px #24395406;transition:box-shadow .18s ease,border-color .18s ease}.course-card:hover{border-color:#adc2e3;box-shadow:0 10px 26px #24395412}
.course-cover{height:auto;min-height:210px;display:flex;flex-direction:column;justify-content:space-between;gap:36px;padding:24px;background:linear-gradient(135deg,#194975,#2d638f)}.cover-1{background:linear-gradient(135deg,#205454,#397775)}.cover-2{background:linear-gradient(135deg,#695136,#8b6d46)}.cover-3{background:linear-gradient(135deg,#48447e,#6661a1)}.course-cover:after{pointer-events:none}
.cover-label{font-size:.75rem;letter-spacing:.1em;color:#fff;opacity:1;position:relative;z-index:1}.cover-symbol{right:24px;top:54px;color:#ffffff38;line-height:1}.cover-name{position:relative;bottom:auto;left:auto;font-size:1.5rem;line-height:1.3;max-width:85%;z-index:1;overflow-wrap:anywhere}.course-info{padding:26px}.course-info h3{font-size:1.25rem;margin:12px 0 10px}.course-info p{font-size:.9375rem;margin-bottom:24px}.course-footer{padding-top:20px;gap:12px;flex-wrap:wrap}.course-footer>span{font-size:.875rem;color:var(--muted)}.course-footer .primary{font-size:.9375rem;padding:11px 18px}
.panel{min-width:0;border-radius:16px;padding:28px;margin-bottom:26px;box-shadow:0 4px 16px #20324a03}.panel>h2{font-size:1.25rem;margin:0 0 20px}.back{display:inline-flex;align-items:center;min-height:44px;font-size:.9375rem;color:#355786;margin-bottom:16px;padding:6px 0}.back:hover{text-decoration:underline}
.tabs{flex-wrap:wrap;gap:10px;margin:30px 0;padding:6px;background:#e9eef6;border:1px solid #dce4ef;border-radius:12px;width:fit-content}.tabs a{min-height:46px;padding:10px 22px;border-radius:8px;color:#415877;font-weight:600}.tabs a:hover{background:#fff}.tabs .selected,.tabs .selected:hover{background:var(--blue);color:#fff}
.table-wrap{border:1px solid var(--line);border-radius:10px}table{font-size:1rem}th{font-size:.875rem;font-weight:700;color:#415574;background:#f0f4fa;padding:18px;white-space:nowrap}td{padding:20px 18px}tbody tr:hover{background:#f8faff}td .secondary{white-space:nowrap;font-size:.9375rem}.unit-number{width:46px;height:auto;min-height:46px;border-radius:10px;color:#2456ab}
.unit-layout{grid-template-columns:270px minmax(0,1fr);gap:28px;margin-top:30px}.category-nav{border-radius:16px;padding:14px}.category-nav .nav-label{color:#52647b;margin:10px 12px 20px}.category-nav a{padding:13px 14px;font-size:.9375rem;line-height:1.5;color:#415574;border:1px solid transparent;border-radius:8px}.category-nav a:hover{background:#f2f6fc}.category-nav .selected{color:#204eaa;border-color:#d2dff8;box-shadow:inset 3px 0 #245dcc}
.material{padding:28px 0 8px}.material h3{margin-top:14px}.material-body{max-width:70ch;font-size:1.0625rem;line-height:1.85}.meta{font-size:.875rem;color:var(--muted);margin-top:26px}.actions{gap:12px;flex-wrap:wrap}.empty{padding:46px 24px;color:var(--muted)}.empty>span{color:#4d6e9f}.empty h3{color:#354d6c}.empty p{max-width:55ch;margin:0 auto}.compact{padding:18px 24px}.compact summary{color:#355786;min-height:44px;align-content:center;font-weight:600}
.admin-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:32px}label{font-size:.9375rem;font-weight:600;color:#354d6c;margin:20px 0}input,select,textarea{min-width:0;border-color:#aab9ce;border-radius:8px;padding:12px 14px;margin-top:9px;font-size:1rem;font-weight:400;min-height:48px;color:#20324a}input::placeholder,textarea::placeholder{color:#65768e;opacity:1}input:focus,select:focus,textarea:focus{border-color:#245dcc}textarea{line-height:1.7}.form-row label{min-width:0}.assignment{grid-template-columns:1.2fr 1fr 1fr auto;gap:18px;padding:18px 0}.assignment select{margin:0}.assignment:last-child{border:0}
.alert{padding:16px 22px;border-radius:10px;color:#225c42;border:1px solid #b9dec9}.error{color:#992b41;border-color:#f0c8d2;background:#fff0f2}footer{font-size:.875rem;color:var(--muted);padding:22px;border-top:1px solid var(--line)}
.login{grid-template-columns:1fr 1fr}.login-story{padding:60px clamp(35px,6vw,100px);background:#142943;background-image:radial-gradient(ellipse at bottom left,#315781 0,transparent 70%);display:flex;flex-direction:column;justify-content:center}.login-story>.brand{margin-bottom:80px;font-size:1.6rem}.login-story>.eyebrow{margin-top:0;color:#bed4f5}.login-story h1{font-size:clamp(2.4rem,4vw,3.75rem);line-height:1.15;margin:24px 0}.login-story p{font-size:1.125rem;color:#d1deef;line-height:1.8}.login-story small{font-size:.875rem;color:#bfcee1;margin-top:55px}.orbit{margin-top:26px;font-size:88px;color:#a8c6ff;line-height:1.2}.orbit span{font-size:1rem;color:#d1deef}.login-form{max-width:510px;padding:44px}.login-form h2{font-size:2rem;margin:20px 0 12px}.login-form>p{color:var(--muted);margin-bottom:32px}.login-form>.reading-tools{justify-content:flex-end;margin-bottom:44px;flex-wrap:wrap}.demo{font-size:.9375rem;color:var(--muted);border-top:1px solid var(--line);padding-top:18px}.demo summary{min-height:44px;align-content:center}.demo p{overflow-wrap:anywhere}
.skip-link{position:fixed;top:10px;left:10px;z-index:100;transform:translateY(-160%);background:#fff;color:#17439c;border:2px solid #245dcc;padding:12px 20px;border-radius:8px}.skip-link:focus{transform:translateY(0)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(min-width:1600px){.course-cover{min-height:235px}}
@media(max-width:1200px){.sidebar{width:232px;padding-inline:16px}.workspace{margin-left:232px}header,.content{padding:28px}.admin-grid{grid-template-columns:1fr}.unit-layout{grid-template-columns:240px minmax(0,1fr)}.assignment{grid-template-columns:1fr 1fr}.welcome-art{padding:0}}
@media(max-width:900px){.sidebar{position:relative;width:100%;padding:22px;display:block}.school{margin:6px 10px 12px}.sidebar-bottom,.sidebar .nav-label{display:none}.sidebar .nav{display:inline-block;margin:8px 6px 0 0;padding:11px 15px}.workspace{margin-left:0}header{padding:18px 24px}.header-tools{gap:18px}.unit-layout{grid-template-columns:1fr}.category-nav{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px;overflow:visible}.category-nav .nav-label{display:block;grid-column:1 / -1;margin-bottom:8px}.category-nav a{margin:0;white-space:normal}.login-story{padding:45px 30px}.login-form{padding:35px 28px}}
@media(max-width:600px){header{gap:16px}header>span{font-size:1rem}.header-tools{width:100%;justify-content:space-between}.profile{flex-wrap:wrap}.profile>span:nth-child(2){max-width:180px;overflow-wrap:anywhere}.content{padding:28px 18px}.welcome{padding:26px 24px}.welcome-art{display:none}.welcome h2{font-size:1.5rem}.page-title{align-items:flex-start;flex-direction:column;gap:16px}.panel{padding:22px 18px}.tabs{width:100%;display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.tabs a{padding:10px;text-align:center;font-size:1rem}th,td{padding:15px 12px}.category-nav{grid-template-columns:1fr}.assignment{grid-template-columns:1fr}.form-row{flex-direction:column;gap:0}.form-row label{width:100%}.login{grid-template-columns:1fr}.login-story{padding:35px 28px}.login-story>.brand{margin-bottom:35px}.login-story h1{font-size:2.5rem}.login-story small,.orbit{display:none}.login-form{padding:32px 24px}.login-form>.reading-tools{margin-bottom:30px}}
.edu-icon{width:1.35em;height:1.35em;display:inline-block;vertical-align:middle;flex-shrink:0}
.brand .edu-icon,.nav .edu-icon{margin-right:8px}
.welcome-art .edu-icon{width:96px;height:96px;display:block}
.orbit>.edu-icon{width:80px;height:80px}
.cover-symbol .edu-icon{width:76px;height:76px;display:block}
.empty>span .edu-icon{width:48px;height:48px}
.back{display:flex;width:fit-content}
.empty h2{font-size:1.25rem}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}
.help-text,.file-name{font-size:.875rem;color:var(--muted);margin:14px 0;overflow-wrap:anywhere}
.check-label{display:flex;align-items:flex-start;gap:12px;font-size:1rem;line-height:1.6}
.check-label input{width:22px;height:22px;min-height:0;flex-shrink:0;margin-top:3px;accent-color:var(--blue)}
.work-box{background:#f5f8fd;border:1px solid #d5e1f3;border-radius:12px;padding:24px;margin-top:24px}
.work-box h4{font-size:1.125rem;margin:0}
.work-box summary,.storage-status summary{cursor:pointer;min-height:44px;align-content:center;color:#355786;font-weight:600}
.storage-status{padding:14px 22px}.storage-status progress{width:100%;height:12px;accent-color:var(--blue);margin:15px 0}
.grade-result{display:flex;align-items:center;gap:16px;margin:24px 0}.grade-result p{margin:4px 0 0}
.grade{display:inline-grid;place-items:center;min-width:62px;min-height:62px;padding:10px;font-size:1.5rem;font-weight:700;border-radius:12px;background:#e4f5ed;color:#225c42;border:1px solid #b9dec9}
.grade-C{background:#fff0f2;color:#992b41;border-color:#f0c8d2}.grade-B{background:#fff5df;color:#7a4b08;border-color:#edd7ab}.grade-AD{background:#e7efff;color:#204eaa;border-color:#cad9f3}
.feedback{border-left:3px solid #4974c8;padding:12px 18px;background:#edf3ff;margin:20px 0}.feedback p{margin:8px 0 0;overflow-wrap:anywhere}
.review-stats{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}.review-card h2{font-size:1.25rem;margin:0}.review-card .meta{margin:8px 0}.grading-form{border-top:1px solid var(--line);margin-top:24px;padding-top:6px}.grading-form select{max-width:360px}
input[type=file]{padding:10px;font-size:.9375rem}input[type=file]::file-selector-button{border:0;border-radius:6px;padding:8px 12px;background:#eaf0fd;color:#204eaa;font:inherit;cursor:pointer;margin-right:12px}
@media(max-width:600px){.work-box{padding:20px 15px}.grade-result{align-items:flex-start}.storage-status{padding:12px 18px}}