:root{color-scheme:light;--bg: #f5f1e8;--bg-strong: #fffaf0;--surface: rgba(255, 252, 246, .82);--surface-solid: #fffdf8;--ink: #16201c;--muted: #6e7a75;--line: rgba(28, 40, 35, .12);--shadow: 0 24px 90px rgba(48, 38, 25, .13);--teal: #0f766e;--teal-soft: #dff3ec;--blue: #255f99;--blue-soft: #dfeafa;--gold: #b7791f;--gold-soft: #fff1d0;--rose: #b94b5d;--rose-soft: #ffe4e8;--danger: #d94f3d}:root[data-theme=dark]{color-scheme:dark;--bg: #0d1210;--bg-strong: #151d19;--surface: rgba(22, 31, 27, .82);--surface-solid: #17211d;--ink: #edf5ef;--muted: #9aa9a2;--line: rgba(237, 245, 239, .12);--shadow: 0 24px 90px rgba(0, 0, 0, .4);--teal: #5fd0bf;--teal-soft: rgba(95, 208, 191, .14);--blue: #86baf0;--blue-soft: rgba(134, 186, 240, .14);--gold: #ecc36d;--gold-soft: rgba(236, 195, 109, .16);--rose: #ff91a2;--rose-soft: rgba(255, 145, 162, .14);--danger: #ff7968}*{box-sizing:border-box}body{margin:0;min-width:320px;color:var(--ink);background:radial-gradient(circle at 12% 8%,rgba(15,118,110,.2),transparent 24rem),radial-gradient(circle at 92% 12%,rgba(183,121,31,.16),transparent 28rem),linear-gradient(135deg,var(--bg),var(--bg-strong));font-family:Avenir Next,Satoshi,Gill Sans,Trebuchet MS,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}.login-screen{min-height:100vh;display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:center;padding:min(8vw,80px);position:relative}.theme-float{position:fixed;top:22px;right:22px;border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:999px;padding:10px 14px;display:inline-flex;gap:8px;align-items:center;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.login-hero{position:relative;min-height:560px;display:flex;align-items:center}.login-copy{position:relative;z-index:1;max-width:680px}.login-copy h1{font-size:clamp(44px,8vw,92px);line-height:.9;letter-spacing:-.07em;margin:34px 0 24px}.login-copy p{color:var(--muted);font-size:19px;line-height:1.65;max-width:560px}.orb{position:absolute;border-radius:999px;filter:blur(6px);opacity:.58}.orb-one{width:260px;height:260px;background:var(--teal-soft);top:50px;left:40px}.orb-two{width:180px;height:180px;background:var(--gold-soft);right:90px;bottom:80px}.brand{display:flex;align-items:center;gap:12px}.brand.large strong{font-size:20px}.brand span,.kicker{display:block;color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase}.brand-mark{width:44px;height:44px;display:grid;place-items:center;border-radius:16px;color:#fff;font-weight:900;background:linear-gradient(135deg,var(--teal),var(--blue));box-shadow:0 16px 40px #0f766e40}.feature-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}.feature-strip span,.status-pill{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:999px;padding:7px 11px;font-size:12px;font-weight:800}.login-card,.card{background:var(--surface);border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px)}.login-card{padding:30px}.login-card-head{display:flex;align-items:center;gap:14px;margin-bottom:28px}.login-card-head h2{font-size:34px;margin:0;letter-spacing:-.05em}.field{display:grid;gap:8px;margin-bottom:16px}.field span{color:var(--muted);font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}input,select,textarea{width:100%;color:var(--ink);background:var(--surface-solid);border:1px solid var(--line);border-radius:16px;padding:13px 14px;outline:none}textarea{min-height:92px;resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--teal);box-shadow:0 0 0 4px var(--teal-soft)}.primary-button,.small-button,.ghost-button,.icon-button{border:0;color:var(--ink);border-radius:16px;display:inline-flex;align-items:center;justify-content:center;gap:8px}.primary-button{width:100%;padding:14px 18px;background:var(--ink);color:var(--bg);font-weight:900}.small-button{background:var(--teal-soft);color:var(--teal);padding:8px 12px;font-weight:900;white-space:nowrap}.ghost-button,.icon-button{background:transparent;border:1px solid var(--line);padding:11px 12px}.danger{color:var(--danger)}.form-error{background:var(--rose-soft);color:var(--rose);border-radius:14px;padding:12px;margin-bottom:14px}.success-text,.success-banner{color:var(--teal);font-weight:800}.success-banner{background:var(--teal-soft);border:1px solid var(--line);border-radius:18px;padding:14px 16px}.demo-users{margin-top:22px;color:var(--muted)}.demo-users div{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}.demo-users button{border:1px solid var(--line);background:var(--surface-solid);color:var(--ink);border-radius:999px;padding:7px 12px}.shell{min-height:100vh;display:grid;grid-template-columns:280px 1fr}.sidebar{position:sticky;top:0;height:100vh;padding:24px;border-right:1px solid var(--line);background:#fffcf68c;-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);display:flex;flex-direction:column}:root[data-theme=dark] .sidebar{background:#0c120f9e}.sidebar.collapsed{width:96px}.sidebar.collapsed .brand div:not(.brand-mark),.sidebar.collapsed .side-nav span,.sidebar.collapsed .sidebar-footer span{display:none}.side-nav{display:grid;gap:10px;margin-top:34px}.side-nav button{border:1px solid transparent;background:transparent;color:var(--muted);border-radius:18px;padding:13px;display:flex;align-items:center;gap:12px;font-weight:800;text-align:left}.side-nav button.active{color:var(--ink);background:var(--surface-solid);border-color:var(--line);box-shadow:0 14px 32px #201d1714}.sidebar-footer{margin-top:auto;display:grid;gap:10px}.workspace{padding:26px min(4vw,54px) 60px;min-width:0}.topbar{display:flex;align-items:center;gap:18px;margin-bottom:34px}.topbar h1{margin:3px 0 0;font-size:clamp(24px,4vw,42px);letter-spacing:-.06em}.profile-chip{margin-left:auto;border:1px solid var(--line);background:var(--surface);border-radius:999px;padding:9px 14px;display:grid;gap:2px;text-align:right}.profile-chip span{color:var(--teal);font-size:12px;font-weight:900;text-transform:uppercase}.profile-chip strong{font-size:13px}.page-header{max-width:860px;margin-bottom:24px}.page-header h2{font-size:clamp(34px,6vw,64px);line-height:.95;letter-spacing:-.07em;margin:8px 0 14px}.page-header p:not(.kicker){color:var(--muted);font-size:17px;line-height:1.55}.stat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:18px}.card{padding:22px;margin-bottom:18px}.card h3{margin:0 0 16px;font-size:22px;letter-spacing:-.03em}.card-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px}.card-head h3{margin:0}.stat-card{min-height:150px;display:flex;flex-direction:column;justify-content:space-between}.stat-card span{color:var(--muted);font-weight:800}.stat-card strong{font-size:46px;letter-spacing:-.06em}.tone-teal{background:linear-gradient(135deg,var(--surface),var(--teal-soft))}.tone-blue{background:linear-gradient(135deg,var(--surface),var(--blue-soft))}.tone-gold{background:linear-gradient(135deg,var(--surface),var(--gold-soft))}.tone-rose{background:linear-gradient(135deg,var(--surface),var(--rose-soft))}.two-column{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:18px}.form-grid{display:grid;gap:12px}.stack-list{display:grid;gap:10px}.list-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:14px;border:1px solid var(--line);border-radius:18px;background:var(--surface-solid)}.list-row span{display:grid;gap:4px}.list-row small{color:var(--muted)}.button-row{width:100%;color:var(--ink);text-align:left}.assignment-row{align-items:flex-start}.notification.read{opacity:.68}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;border-bottom:1px solid var(--line);padding:13px 10px}th{color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase}.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}.mini-course{display:grid;gap:8px;padding:18px;border:1px solid var(--line);border-radius:20px;background:var(--surface-solid)}.mini-course span{color:var(--teal);font-size:12px;font-weight:900}.empty-state{color:var(--muted);border:1px dashed var(--line);border-radius:20px;padding:24px;text-align:center}.empty-state strong{color:var(--ink)}.file-button{position:relative;overflow:hidden}.file-button input{position:absolute;top:0;right:0;bottom:0;left:0;opacity:0}@media(max-width:1050px){.login-screen,.shell,.two-column,.stat-grid{grid-template-columns:1fr}.sidebar{position:relative;height:auto}.login-hero{min-height:auto}}@media(max-width:680px){.login-screen,.workspace{padding:22px}.topbar,.list-row,.card-head{align-items:flex-start;flex-direction:column}.profile-chip{margin-left:0;text-align:left}}