:root{--ink:#17222b;--ink-2:#24353e;--muted:#77838a;--line:#e5e9e8;--surface:#fff;--canvas:#f6f8f6;--teal:#24a98e;--teal-dark:#147363;--mint:#d8f3ea;--coral:#f47761;--coral-soft:#ffebe4;--lilac:#ddd9ff;--amber:#f4bd61;--amber-soft:#fff3d8;--shadow:0 18px 48px rgba(31,49,54,.08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--canvas)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:radial-gradient(circle at 90% -8%,#dff4eb 0,transparent 30%),var(--canvas)}a{color:var(--teal-dark);text-decoration:none}button,input,textarea{font:inherit}button{cursor:pointer}input,textarea{width:100%;border:1px solid #d6dfdd;border-radius:12px;padding:.84rem .95rem;background:#fff;color:var(--ink);outline:none;transition:.18s}input:focus,textarea:focus{border-color:var(--teal);box-shadow:0 0 0 4px rgba(36,169,142,.12)}label{display:grid;gap:.48rem;color:#405059;font-size:.77rem;font-weight:800;letter-spacing:.01em}.shell{width:min(1240px,calc(100% - 64px));margin:0 auto;padding:42px 0 84px}.topbar{height:78px;padding:0 max(32px,calc((100% - 1240px)/2));display:flex;align-items:center;gap:34px;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(213,224,220,.75);backdrop-filter:blur(16px);position:sticky;top:0;z-index:30}.brand{display:flex;align-items:center;gap:10px;color:var(--ink);min-width:205px}.brand>span{width:38px;height:38px;display:grid;place-items:center;border-radius:13px;background:var(--ink);color:#fff;font-weight:950;font-size:1.1rem}.brand strong{font-size:1.05rem;letter-spacing:-.02em}.brand small{display:block;color:#9ba5a7;font-size:.63rem;font-weight:700;margin-top:2px}.main-nav{display:flex;gap:27px;align-items:center;flex:1}.main-nav a{font-size:.78rem;color:#718086;font-weight:800;padding:29px 0;position:relative}.main-nav a:hover,.main-nav a:focus{color:var(--ink)}.main-nav a:first-child{color:var(--ink)}.main-nav a:first-child:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--coral);border-radius:3px}.user-nav{display:flex;align-items:center;gap:10px}.avatar{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--lilac);color:#4d4680;font-weight:900;font-size:.78rem}.identity{display:grid;gap:1px;font-size:.76rem;font-weight:850}.identity small{font-size:.62rem;color:#8b989b;font-weight:650}.logout{font-size:.72rem;color:#9aa5a7;margin-left:14px}.logout:hover{color:var(--coral)}footer{text-align:center;border-top:1px solid var(--line);padding:25px;color:#9ba5a7;font-size:.72rem}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(2.2rem,4.5vw,4rem);letter-spacing:-.065em;line-height:.98;margin-bottom:13px}h2{font-size:1.38rem;letter-spacing:-.035em;margin-bottom:8px}h3{font-size:1.05rem;letter-spacing:-.025em}.eyebrow{color:var(--teal-dark);font-size:.63rem;font-weight:950;letter-spacing:.16em;margin-bottom:13px}.muted,p{color:var(--muted);line-height:1.6}.card{background:var(--surface);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}.button{display:inline-flex;justify-content:center;align-items:center;gap:7px;border:0;border-radius:11px;padding:.84rem 1.1rem;background:var(--ink);color:#fff;font-weight:850;font-size:.78rem;transition:.18s}.button:hover{background:var(--teal-dark);transform:translateY(-1px)}.button.secondary{background:var(--mint);color:var(--teal-dark)}.button.full{width:100%}.alert{padding:13px 17px;border-radius:12px;margin-bottom:24px;font-size:.8rem;font-weight:750}.alert.success{background:#ddf4ea;color:#176b59;border:1px solid #bae8d6}.alert.error{background:#ffe8e3;color:#a33f32;border:1px solid #f8c9bf}.page-heading{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:38px}.page-heading>div:first-child{max-width:730px}.page-heading p{font-size:.93rem;margin-bottom:0}.page-heading.compact h1{font-size:2.7rem}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:50px 0 20px}.section-head h2{margin-bottom:4px}.section-head p{font-size:.8rem;margin-bottom:0}.section-with-action{margin-top:44px}.text-action{font-size:.76rem;font-weight:900;color:var(--teal-dark)}.back{display:inline-block;color:#8b989b;font-size:.74rem;font-weight:850;margin-bottom:20px}.login-layout{min-height:calc(100vh - 150px);display:grid;grid-template-columns:1.2fr .68fr;align-items:center;gap:9vw}.login-copy h1{max-width:680px}.login-copy>p{font-size:1.06rem;max-width:590px}.login-card{padding:35px;display:grid;gap:17px;text-align:center}.logo-mark{width:48px;height:48px;margin:auto;display:grid;place-items:center;background:var(--ink);border-radius:15px;color:#fff;font-size:1.45rem;font-weight:950}.login-card h2{margin:0}.login-card p{margin:0;font-size:.8rem}.login-card label{text-align:left}.rule-card{margin-top:38px;display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:.75rem}.rule-card strong{width:100%;font-size:.62rem;color:#819096;letter-spacing:.14em}.rule-card span{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-weight:800}.rule-card span:nth-of-type(2){background:var(--coral-soft);border-color:#ffd1c5;color:#b94c36}.rule-card b{color:#9aa8a7}.demo-users{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}.demo-users button{border:1px solid var(--line);border-radius:9px;background:#f9fbfa;padding:8px;color:var(--teal-dark);font-size:.68rem;font-weight:850}.login-card small{font-size:.68rem;color:#98a4a5}.login-card code{color:var(--ink);background:#eef2ef;padding:2px 5px;border-radius:4px}.teacher-hero{display:grid;grid-template-columns:1fr 180px 220px;align-items:center;gap:25px;padding:32px 38px;border-radius:23px;background:var(--ink);color:#fff;overflow:hidden;position:relative}.teacher-hero:after{content:"";width:360px;height:360px;border:1px solid rgba(255,255,255,.08);border-radius:50%;position:absolute;right:-155px;top:-130px;box-shadow:0 0 0 40px rgba(255,255,255,.03),0 0 0 80px rgba(255,255,255,.02)}.teacher-hero h2{font-size:1.85rem;margin-bottom:7px}.teacher-hero p{color:#aebdbd;font-size:.82rem;margin:0;max-width:480px}.teacher-hero .eyebrow{color:#86e7d0}.hero-orbit{height:118px;width:118px;border-radius:50%;background:radial-gradient(circle at 34% 30%,#fff 0 5px,transparent 6px),conic-gradient(var(--coral) 0 25%,var(--teal) 25% 100%);display:grid;place-content:center;text-align:center;position:relative;z-index:1}.hero-orbit:before{content:"";position:absolute;inset:8px;border-radius:50%;background:var(--ink)}.hero-orbit>*{position:relative}.hero-orbit span{color:var(--coral);font-size:1.3rem;line-height:1}.hero-orbit b{font-size:1.35rem}.hero-orbit small{color:#9db1af;font-size:.6rem}.hero-quick{display:grid;gap:10px;position:relative;z-index:1}.hero-quick span{padding:13px 15px;border:1px solid rgba(255,255,255,.1);border-radius:11px;color:#9fb0af;font-size:.7rem}.hero-quick b{color:#fff;font-size:1.1rem;margin-right:7px}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.subject-summary{padding:22px;min-height:202px;display:flex;flex-direction:column}.subject-card-top{display:flex;align-items:center;justify-content:space-between}.course-symbol{width:40px;height:40px;border-radius:13px;display:grid;place-items:center;background:var(--coral-soft);color:var(--coral);font-size:1rem;font-weight:950}.course-code{font-size:.64rem;color:#93a0a2;font-weight:900;letter-spacing:.08em}.subject-summary h2{font-size:1.28rem;margin:24px 0 7px}.subject-summary p{font-size:.75rem;margin:0;color:#899598}.subject-card-actions{display:flex;gap:8px;align-items:center;margin-top:auto;padding-top:22px}.subject-card-actions .button{font-size:.7rem}.icon-link{display:grid;place-items:center;width:38px;height:37px;border-radius:10px;background:#f2f5f3;color:var(--ink);font-weight:900}.new-subject{margin-top:26px;padding:22px 26px;display:grid;grid-template-columns:.8fr 1.2fr;align-items:center;gap:40px;background:#fffdf8;border-color:#f2e8d4}.new-subject h2{margin-bottom:4px}.new-subject p{font-size:.78rem;margin:0}.new-subject form{display:grid;grid-template-columns:1fr .65fr auto;align-items:end;gap:10px}.new-subject .button{height:45px;white-space:nowrap}.course-empty{grid-column:1/-1;text-align:center;padding:48px}.empty-icon{width:45px;height:45px;display:grid;place-items:center;border-radius:14px;background:var(--mint);color:var(--teal);font-size:1.25rem;margin:0 auto 12px}.empty h3{margin-bottom:6px}.empty p{font-size:.8rem}.course-heading{align-items:end}.course-layout{display:grid;grid-template-columns:1fr .87fr;gap:20px}.course-overview{padding:24px;display:grid;grid-template-columns:175px 1fr;gap:24px;align-items:center;overflow:hidden}.course-cover{height:210px;border-radius:15px;background:linear-gradient(140deg,var(--coral),#ffb37b);color:#fff;position:relative;padding:18px;display:flex;flex-direction:column;justify-content:space-between}.course-cover:after{content:"";position:absolute;width:150px;height:150px;border:1px solid rgba(255,255,255,.38);border-radius:50%;right:-75px;bottom:-30px;box-shadow:0 0 0 25px rgba(255,255,255,.12),0 0 0 50px rgba(255,255,255,.08)}.course-cover span{font-size:.65rem;font-weight:950;letter-spacing:.12em}.course-cover strong{font-size:5rem;line-height:.8;position:relative;z-index:1}.course-overview-copy h2{font-size:1.7rem}.course-overview-copy p{font-size:.82rem}.course-stats{display:flex;gap:22px;font-size:.7rem;color:#859196}.course-stats b{display:block;color:var(--ink);font-size:1.25rem}.create-card{padding:27px}.card-kicker{color:var(--coral);font-size:.62rem;font-weight:950;letter-spacing:.14em;margin-bottom:10px}.create-card h2{font-size:1.55rem}.create-card p{font-size:.78rem;margin-bottom:19px}.create-card form{display:grid;gap:12px}.form-row{display:grid;grid-template-columns:1fr .5fr;gap:10px}.toggle-row{display:flex;gap:13px;flex-wrap:wrap}.switch{display:flex;grid-template-columns:auto 1fr;align-items:center;gap:7px;font-size:.65rem;color:#78868a;font-weight:750}.switch input{display:none}.switch span{width:27px;height:16px;border-radius:20px;background:#d4deda;position:relative}.switch span:after{content:"";position:absolute;width:12px;height:12px;left:2px;top:2px;border-radius:50%;background:#fff;transition:.2s}.switch input:checked+span{background:var(--teal)}.switch input:checked+span:after{left:13px}.manage-activity-list{display:grid;gap:12px}.manage-activity{padding:18px 20px;display:grid;grid-template-columns:48px 1fr 130px;gap:17px;align-items:center}.activity-icon{width:44px;height:44px;display:grid;place-items:center;border-radius:13px;background:var(--lilac);color:#625a9b;font-weight:950}.manage-activity:nth-child(2n) .activity-icon{background:var(--mint);color:var(--teal-dark)}.manage-activity:nth-child(3n) .activity-icon{background:var(--amber-soft);color:#a06b18}.manage-activity-copy h3{margin:5px 0 4px}.manage-activity-copy p{font-size:.75rem;margin:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.activity-meta{display:flex;gap:15px;color:#98a4a6;font-size:.64rem;font-weight:800}.manage-activity-side{text-align:right;border-left:1px solid var(--line);padding-left:18px}.manage-activity-side strong{font-size:1.6rem;display:block}.manage-activity-side small{color:#94a0a2;font-size:.63rem}.manage-activity-side a{font-size:.67rem;display:block;margin-top:10px;font-weight:850}.subject-block{margin-top:35px}.subject-title{background:var(--ink);color:#fff;padding:28px 32px;border-radius:20px 20px 0 0;display:flex;justify-content:space-between;align-items:center}.subject-title h2{margin:4px 0 0;font-size:1.8rem}.subject-title span{font-size:.65rem;color:#a5b6b5;text-transform:uppercase;letter-spacing:.13em}.progress-ring{width:88px;height:88px;border-radius:50%;background:conic-gradient(var(--coral) calc(var(--progress)*1%),#435158 0);display:grid;place-content:center;text-align:center;position:relative}.progress-ring:before{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--ink)}.progress-ring>*{position:relative}.progress-ring strong{font-size:1.3rem}.progress-ring small{font-size:.6rem;color:#acbcbb}.metrics{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border:1px solid var(--line);border-top:0}.metrics article{padding:18px 25px;border-right:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.metrics article:last-child{border:0}.metrics span{font-size:.72rem;color:#849196}.metrics strong{font-size:1.2rem}.activity-list{display:grid;gap:15px;margin-top:18px}.activity-card{padding:24px 26px;display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.65fr);gap:28px}.activity-card h3{font-size:1.2rem;margin-bottom:6px}.activity-card p{font-size:.8rem;margin-bottom:14px}.status-line{display:flex;gap:6px;flex-wrap:wrap}.badge{display:inline-block;padding:5px 9px;border-radius:999px;font-size:.62rem;font-weight:900;white-space:nowrap;margin:2px}.badge.automatic{background:var(--amber-soft);color:#8d650f}.badge.reviewed{background:var(--mint);color:var(--teal-dark)}.badge.warning{background:#ffebce;color:#945909}.badge.danger{background:#ffe6e1;color:#a34032}.badge.neutral{background:#ecf0ef;color:#657276}.badge.late{background:var(--lilac);color:#62568f}.grade-callout{display:flex;align-items:center;gap:12px;border-left:3px solid var(--coral);padding:8px 12px;margin-top:15px;background:#fff9f4;border-radius:0 9px 9px 0;font-size:.72rem;color:#78868a}.grade-callout>strong{font-size:1.5rem;color:var(--ink)}.grade-callout small{display:block;margin-top:4px}.submission-panel{align-self:start;border-left:1px solid var(--line);padding-left:27px}.submission-panel summary{cursor:pointer;color:var(--teal-dark);font-weight:900;font-size:.78rem;padding:5px 0 15px}.submission-panel form{display:grid;gap:13px}.notice{font-size:.7rem;background:#f4f8ed;padding:10px;border-radius:8px;margin:0}.filters{display:flex;gap:6px;margin:18px 0;flex-wrap:wrap}.filters a{padding:9px 13px;border-radius:999px;color:#758388;font-size:.7rem;font-weight:850;border:1px solid var(--line);background:#fff}.filters a.active{background:var(--ink);color:#fff;border-color:var(--ink)}.table-wrap{overflow:auto;background:#fff;border:1px solid var(--line);border-radius:15px}.table-wrap table{width:100%;border-collapse:collapse;min-width:750px}.table-wrap th{text-align:left;font-size:.61rem;text-transform:uppercase;letter-spacing:.09em;color:#879498;background:#fafcfb}.table-wrap th,.table-wrap td{padding:14px;border-bottom:1px solid #edf0ef}.table-wrap tr:last-child td{border-bottom:0}.table-wrap td{font-size:.76rem}.table-wrap td small{display:block;color:#9aa5a7;margin-top:4px}.grade-cell{font-size:1rem!important;font-weight:900}.empty-row{text-align:center;color:#899598;padding:40px!important}.legend{display:flex;gap:18px;margin:-18px 0 18px;font-size:.7rem;color:#859295}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:5px}.dot.auto{background:var(--amber)}.dot.reviewed{background:var(--teal)}.dot.emptydot{background:#c4cece}.gradebook th:not(:first-child),.gradebook td:not(:first-child){text-align:center}.gradebook th span{display:block;max-width:125px}.gradebook th small{display:block;margin-top:5px}.grade-chip{display:inline-grid;min-width:53px;padding:7px 8px;border-radius:8px}.grade-chip b{font-size:.94rem}.grade-chip small{font-size:.56rem!important;margin:0!important;text-transform:uppercase}.grade-chip.is-auto{background:var(--amber-soft);color:#775a08}.grade-chip.is-reviewed{background:var(--mint);color:var(--teal-dark)}.no-grade{color:#b1bbbb}.hero-grade{text-align:center;display:grid;gap:5px}.hero-grade>strong{font-size:3.2rem;line-height:1}.review-grid{display:grid;grid-template-columns:1.4fr .7fr;gap:21px;align-items:start}.attempt{padding:19px;margin-bottom:11px}.attempt time{display:block;color:#97a2a4;font-size:.67rem;margin:8px 0 11px}.attempt-number{font-size:.64rem;font-weight:950;text-transform:uppercase;letter-spacing:.09em;color:var(--teal-dark)}.file-link{display:inline-block;background:var(--mint);padding:8px 11px;border-radius:8px;font-weight:850;font-size:.72rem}.grade-form{padding:23px;display:grid;gap:14px;position:sticky;top:98px}.grade-form h2{margin-bottom:0}.grade-form p{font-size:.74rem;margin-bottom:1px}.history{margin-top:38px}.empty{text-align:center;padding:40px}.settings-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.setting-card{padding:28px}.setting-card .number{font-size:.68rem;font-weight:950;color:var(--coral)}.setting-card h2{margin-top:10px}.setting-card>label:not(.radio){margin-top:26px}.radio{display:flex;grid-template-columns:auto 1fr;gap:11px;align-items:start;border:1px solid var(--line);padding:13px;border-radius:10px;margin-top:9px;cursor:pointer}.radio input{width:auto;margin-top:3px}.radio span{display:grid;gap:3px}.radio small{color:var(--muted);font-weight:400}.settings-action{grid-column:1/-1;display:flex;justify-content:flex-end}@media(max-width:950px){.topbar{padding:0 22px}.main-nav{gap:15px}.brand{min-width:175px}.shell{width:min(100% - 40px,1240px)}.login-layout,.review-grid,.settings-grid,.course-layout{grid-template-columns:1fr}.teacher-hero{grid-template-columns:1fr 150px 190px}.summary-grid{grid-template-columns:repeat(2,1fr)}.new-subject{grid-template-columns:1fr}.new-subject form{grid-template-columns:1fr 1fr auto}.grade-form{position:static}}@media(max-width:650px){.topbar{height:66px;padding:0 15px;gap:10px}.brand{min-width:0}.brand small,.main-nav,.identity{display:none}.brand strong{font-size:.96rem}.user-nav{margin-left:auto}.logout{margin-left:3px}.shell{width:calc(100% - 24px);padding-top:28px}.page-heading{align-items:start;flex-direction:column}.page-heading .button{width:100%}h1{font-size:2.45rem}.summary-grid{grid-template-columns:1fr}.teacher-hero{grid-template-columns:1fr;padding:25px}.hero-orbit{display:none}.hero-quick{grid-template-columns:1fr 1fr}.new-subject form,.form-row{grid-template-columns:1fr}.course-overview{grid-template-columns:1fr}.course-cover{height:130px}.course-cover strong{font-size:3.5rem}.manage-activity{grid-template-columns:42px 1fr}.manage-activity-side{grid-column:2;text-align:left;border-left:0;border-top:1px solid var(--line);padding:11px 0 0}.activity-card{grid-template-columns:1fr}.submission-panel{border-left:0;border-top:1px solid var(--line);padding:16px 0 0}.metrics{grid-template-columns:1fr}.metrics article{border-right:0;border-bottom:1px solid var(--line)}.section-head{align-items:start;flex-direction:column}.settings-action{grid-column:auto}}
