:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5;font-weight:400;color:#172033;background:#f6f8fb;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--bg: #f6f8fb;--surface: #ffffff;--surface-strong: #eef4f6;--text: #172033;--muted: #667085;--line: #d9e1e8;--primary: #0f766e;--primary-strong: #115e59;--blue: #2563eb;--amber: #b45309;--rose: #be123c;--green: #15803d;--shadow: 0 18px 40px rgba(33, 43, 54, .08)}:root[data-theme=dark]{color-scheme:dark;--bg: #101419;--surface: #171d24;--surface-strong: #202a33;--text: #eff6ff;--muted: #a9b4c2;--line: #2e3a46;--primary: #2dd4bf;--primary-strong: #14b8a6;--blue: #60a5fa;--amber: #f59e0b;--rose: #fb7185;--green: #4ade80;--shadow: 0 18px 40px rgba(0, 0, 0, .24)}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--bg);color:var(--text);overflow-x:hidden}button,input,select,textarea{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}img{max-width:100%}.app-shell{min-height:100vh;display:grid;grid-template-columns:260px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;padding:22px 18px;border-right:1px solid var(--line);background:var(--surface);display:flex;flex-direction:column;gap:24px}.mobile-nav-header{display:flex;align-items:center;justify-content:space-between;gap:12px;min-width:0}.mobile-menu-button{display:none}.brand{display:flex;align-items:center;gap:10px;color:var(--primary-strong);font-weight:800;font-size:1.05rem;min-width:0}.brand span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.brand-logo,.auth-logo{flex:0 0 auto;border-radius:8px;object-fit:cover;background:#000}.brand-logo{width:42px;height:42px}.auth-logo{width:72px;height:72px}.nav-list{display:grid;gap:8px}.nav-link{display:flex;align-items:center;gap:10px;min-height:42px;padding:10px 12px;border-radius:8px;color:var(--muted);white-space:nowrap}.nav-link.active,.nav-link:hover{color:var(--text);background:var(--surface-strong)}.main{min-width:0;padding:24px;overflow:hidden}.topbar{min-height:74px;display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px;margin-inline:-24px;margin-top:-24px;padding:18px 24px;color:#fff;background:#047234;border-bottom:1px solid rgba(255,255,255,.16)}.topbar h1,.section-heading h2,.auth-brand h1,.reader-toolbar h1{margin:0;letter-spacing:0}.topbar h1{font-size:clamp(1.35rem,2vw,1.8rem)}.topbar .eyebrow{color:#ffffffc7}.eyebrow{margin:0 0 4px;color:var(--muted);text-transform:uppercase;font-size:.74rem;font-weight:800;letter-spacing:0}.account-chip{padding:8px 12px;border-radius:8px;color:var(--primary-strong);background:#0f766e1f;font-weight:700;text-transform:capitalize}.topbar .account-chip{color:#fff;background:#0000002e}.topbar-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}.announcement-bar{height:38px;margin:-10px 0 18px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow);display:flex;align-items:center;font-weight:800}.announcement-track{display:inline-flex;width:max-content;min-width:max-content;white-space:nowrap;will-change:transform;backface-visibility:hidden;transform:translateZ(0);animation:announcement-marquee var(--announcement-duration, 180s) linear infinite}.announcement-group{display:inline-flex;flex:0 0 auto}.announcement-group span{flex:0 0 auto;padding-inline:34px;position:relative}.announcement-group span:after{content:"";position:absolute;right:0;top:50%;width:6px;height:6px;border-radius:999px;background:currentColor;opacity:.45;transform:translate(50%,-50%)}@keyframes announcement-marquee{0%{transform:translateZ(0)}to{transform:translate3d(-50%,0,0)}}.page-section{display:grid;gap:18px}.page-section.narrow{max-width:760px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;min-width:0}.section-heading h2{font-size:clamp(1.3rem,2vw,1.8rem);overflow-wrap:anywhere}.department-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px}.department-card{overflow:hidden;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);display:grid}.department-image{width:100%;aspect-ratio:16 / 9;object-fit:cover;background:var(--surface-strong)}.department-placeholder{display:grid;place-items:center;color:var(--primary-strong);background:linear-gradient(135deg,#0f766e2e,#2563eb1f),var(--surface-strong)}.department-content{padding:18px;display:grid;gap:14px}.department-title-row,.surface-row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.department-title-row h2,.material-item h3,.surface h3{margin:0;font-size:1.05rem}.department-content p,.surface p,.material-item p{margin:0;color:var(--muted)}.department-meta{display:flex;flex-wrap:wrap;gap:10px 14px;color:var(--muted);font-size:.92rem}.department-meta span,.button,.segmented button,.checkbox-row{display:inline-flex;align-items:center;gap:8px}.button{justify-content:center;min-height:42px;padding:10px 14px;border:1px solid transparent;border-radius:8px;font-weight:800;color:var(--text);background:var(--surface-strong);text-align:center}.button-primary{color:#fff;background:var(--primary-strong)}.button-secondary{color:#fff;background:var(--blue)}.button-ghost{border-color:var(--line);background:transparent}.button-small{min-height:34px;padding:6px 10px;font-size:.88rem}.button-wide{width:100%}.icon-button{width:40px;height:40px;border:1px solid var(--line);border-radius:8px;display:inline-grid;place-items:center;color:var(--text);background:var(--surface)}.topbar .icon-button{color:#fff;border-color:#ffffff57;background:#00000024}.topbar .icon-button:hover{background:#ffffff29}.badge{display:inline-flex;align-items:center;justify-content:center;min-height:26px;padding:4px 9px;border-radius:999px;font-size:.78rem;font-weight:800;white-space:nowrap}.badge-success{color:var(--green);background:#15803d1f}.badge-warning{color:var(--amber);background:#b4530921}.badge-danger{color:var(--rose);background:#be123c1f}.badge-info{color:var(--blue);background:#2563eb21}.badge-neutral{color:var(--muted);background:var(--surface-strong)}.auth-screen{min-height:100vh;display:grid;place-items:center;padding:24px}.auth-panel{width:min(460px,100%);padding:24px;border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow);display:grid;gap:20px}.auth-brand{display:flex;gap:12px;align-items:center;min-width:0}.auth-brand p{margin:4px 0 0;color:var(--muted)}.auth-brand h1{overflow-wrap:anywhere}.segmented{display:grid;grid-template-columns:1fr 1fr;gap:4px;padding:4px;border:1px solid var(--line);border-radius:8px;background:var(--surface-strong)}.segmented.inline{width:fit-content}.segmented button{justify-content:center;min-height:36px;border:0;border-radius:6px;color:var(--muted);background:transparent;font-weight:800}.segmented button.active{color:var(--text);background:var(--surface);box-shadow:0 1px 3px #1018281a}.form-grid{display:grid;gap:14px}.admin-form{grid-template-columns:repeat(3,minmax(0,1fr));align-items:end}label{display:grid;gap:6px;color:var(--muted);font-weight:700;font-size:.9rem}input,select,textarea{width:100%;border:1px solid var(--line);border-radius:8px;min-height:42px;padding:9px 11px;color:var(--text);background:var(--surface);outline:none}textarea{resize:vertical}input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px #0f766e26}.password-field{position:relative;display:block}.password-field input{padding-right:48px}.password-toggle{position:absolute;right:8px;top:50%;width:34px;height:34px;transform:translateY(-50%);border:0;border-radius:8px;display:grid;place-items:center;color:var(--muted);background:transparent}.password-toggle:hover{color:var(--text);background:var(--surface-strong)}.link-button{border:0;padding:0;color:var(--primary-strong);background:transparent;font-weight:800}.align-end{justify-self:end}.span-2{grid-column:span 2}.span-3{grid-column:span 3}.checkbox-row{grid-auto-flow:column;justify-content:start}.checkbox-row input{width:18px;min-height:18px}.file-upload-field{align-self:stretch}.file-upload-box{min-height:74px;border:1px dashed var(--line);border-radius:8px;padding:12px;display:grid;grid-template-columns:auto minmax(0,1fr);gap:10px;align-items:center;color:var(--text);background:var(--surface)}.file-upload-box input{grid-column:1 / -1;min-height:38px;padding:7px;min-width:0}.cover-preview{align-self:end;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface)}.cover-preview img{width:100%;height:74px;object-fit:cover;display:block}.alert{border-radius:8px;padding:12px 14px;font-weight:700}.alert-danger{color:var(--rose);background:#be123c1f}.alert-success{color:var(--green);background:#15803d1f}.payment-summary,.surface,.metric{border:1px solid var(--line);border-radius:8px;background:var(--surface);box-shadow:var(--shadow)}.payment-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:16px}.payment-summary span{color:var(--muted)}.payment-summary strong{display:block;margin-top:3px;font-size:1.1rem}.surface{padding:16px;display:grid;gap:12px}.surface.slim{display:flex;justify-content:space-between;gap:12px;box-shadow:none}.material-grid{display:grid;gap:12px}.material-item,.admin-list-item{width:100%;border:1px solid var(--line);border-radius:8px;padding:14px;background:var(--surface);color:var(--text);display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:12px;text-align:left}.material-item:hover,.admin-list-item:hover{border-color:var(--primary)}.empty-state{min-height:120px;display:grid;place-items:center;padding:20px;border:1px dashed var(--line);border-radius:8px;color:var(--muted);background:var(--surface);text-align:center}.reader-screen{height:calc(100vh - 48px);min-height:560px;display:grid;grid-template-rows:auto minmax(0,1fr);gap:14px}.secure-reader,.secure-reader *{-webkit-touch-callout:none;-webkit-user-select:none;user-select:none}.reader-toolbar{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:14px;align-items:center}.reader-toolbar h1{font-size:1.2rem}.reader-frame{position:relative;min-height:0;height:100%;overflow:hidden;border:1px solid var(--line);border-radius:8px;background:#0b0f14}.protected-content{position:relative;z-index:1;height:100%;min-height:0}.reader-frame.is-shielded .protected-content{filter:blur(18px);opacity:0}.reader-shield{position:absolute;top:0;right:0;bottom:0;left:0;z-index:10;display:grid;place-items:center;align-content:center;gap:8px;padding:24px;color:#fff;background:#041210f0;text-align:center}.reader-shield strong{font-size:1.15rem}.reader-shield span{color:#ffffffbd}.reader-document,.reader-media{width:100%;height:100%;min-height:0;border:0;object-fit:contain;display:block}.secure-pdf-viewer{position:relative;z-index:1;height:100%;min-height:0;overflow:auto;padding:18px;overscroll-behavior:contain;touch-action:pan-y;-webkit-overflow-scrolling:touch}.pdf-pages{display:grid;justify-items:center;gap:18px}.pdf-page{max-width:100%;overflow:hidden;border-radius:8px;background:#fff;box-shadow:0 10px 30px #00000047}.pdf-page canvas{max-width:100%;display:block}.secure-text-document{position:relative;z-index:1;width:100%;height:100%;min-height:0;margin:0;padding:28px;overflow:auto;color:var(--text);background:var(--surface);white-space:pre-wrap;font-family:inherit;line-height:1.7}.watermark-layer{pointer-events:none;position:absolute;top:0;right:0;bottom:0;left:0;z-index:6;display:grid;grid-template-columns:repeat(4,minmax(180px,1fr));gap:28px;align-content:center;opacity:.3;transform:rotate(-18deg) scale(1.1);color:#0f766e;font-weight:900;text-shadow:0 1px 2px rgba(255,255,255,.35)}.watermark-layer span{white-space:nowrap}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}.metric{padding:16px;display:grid;gap:8px}.metric span{width:38px;height:38px;border-radius:8px;display:grid;place-items:center;color:var(--primary-strong);background:#0f766e1f}.metric svg{width:20px;height:20px}.metric p{margin:0;color:var(--muted);font-weight:700}.metric strong{font-size:1.5rem}.department-admin-list{display:grid;gap:10px}.admin-list-item{grid-template-columns:minmax(0,1fr) auto auto auto}.department-list-name{font-weight:800}.row-actions{display:flex;gap:8px;justify-content:flex-end}.icon-button.danger{color:var(--rose);background:#be123c1a}.department-detail-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:16px;align-items:start}.department-detail-grid img,.department-detail-placeholder{width:100%;aspect-ratio:16 / 10;border-radius:8px;object-fit:cover;background:var(--surface-strong)}.department-detail-placeholder{display:grid;place-items:center;color:var(--primary-strong)}.department-detail dl{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:14px 0 0}.department-detail dt{color:var(--muted);font-size:.78rem;font-weight:800;text-transform:uppercase}.department-detail dd{margin:4px 0 0;font-weight:800}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:8px;background:var(--surface);-webkit-overflow-scrolling:touch}table{width:100%;border-collapse:collapse;min-width:720px}th,td{padding:13px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}th{color:var(--muted);font-size:.82rem;text-transform:uppercase;letter-spacing:0}td strong,td span{display:block}tr:last-child td{border-bottom:0}.muted{color:var(--muted);font-size:.88rem}.actions-cell{display:flex;gap:8px}.settings-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,420px);gap:18px;align-items:start}.settings-form{align-items:start}.color-field{display:grid;grid-template-columns:56px minmax(0,1fr);gap:8px}.color-field input[type=color]{min-height:42px;padding:4px}.range-field{display:grid;grid-template-columns:minmax(0,1fr) 54px;gap:10px;align-items:center}.range-field input[type=range]{padding-inline:0}.range-field strong{min-height:42px;border:1px solid var(--line);border-radius:8px;display:grid;place-items:center;color:var(--text);background:var(--surface)}.settings-preview{position:sticky;top:96px}.login-preview{min-height:320px;border:1px solid var(--line);border-radius:8px;padding:18px;display:grid;place-items:center;overflow:hidden}.login-preview-card{width:min(250px,100%);padding:18px;border-radius:8px;background:var(--surface);box-shadow:var(--shadow);display:grid;justify-items:center;gap:8px;text-align:center}.login-preview-card img{width:72px;height:72px;border-radius:8px;object-fit:cover;background:#000}.login-preview-card strong{font-size:1.08rem}.login-preview-card span{color:var(--muted);font-size:.85rem}.announcement-preview{min-height:38px;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--surface-strong);display:flex;align-items:center;font-weight:800}.announcement-preview span{padding-inline:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.audit-table{min-width:980px}.metadata-cell{max-width:320px;color:var(--muted);font-family:ui-monospace,SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.78rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}@media(max-width:900px){.app-shell{grid-template-columns:1fr}.sidebar{position:sticky;z-index:20;height:auto;padding:12px 18px;border-right:0;border-bottom:1px solid var(--line);gap:0}.mobile-menu-button{display:inline-grid}.nav-list{display:none;gap:8px;grid-template-columns:repeat(2,minmax(0,1fr));margin-inline:-18px;margin-top:12px;padding-inline:18px;padding-top:12px;border-top:1px solid var(--line);overflow:visible}.sidebar.mobile-open .nav-list{display:grid}.nav-link{flex:none;min-height:40px;white-space:normal;background:var(--surface-strong)}.main{padding:18px}.topbar{margin-inline:-18px;margin-top:-18px;padding:16px 18px}.announcement-bar{margin-top:-8px}.admin-form{grid-template-columns:1fr}.span-2,.span-3{grid-column:auto}.payment-summary,.settings-layout{grid-template-columns:1fr}.settings-preview{position:static}.department-detail-grid{grid-template-columns:minmax(180px,34%) minmax(0,1fr)}}@media(max-width:600px){.main,.auth-screen{padding:14px}.sidebar{padding:12px 14px 10px}.brand{font-size:.98rem}.brand-logo{width:36px;height:36px}.nav-list{margin-inline:-14px;grid-template-columns:1fr;padding-inline:14px}.nav-link{min-height:38px;padding:8px 10px;font-size:.92rem}.section-heading,.department-title-row,.surface.slim{align-items:flex-start;flex-direction:column}.topbar{align-items:flex-start;flex-direction:column;min-height:auto;margin-inline:-14px;margin-top:-14px;margin-bottom:16px;padding:14px}.announcement-bar{height:36px;margin:-8px 0 14px;border-radius:8px;font-size:.92rem}.topbar h1{font-size:1.25rem;line-height:1.2}.topbar-actions{width:100%;justify-content:space-between;flex-wrap:wrap;gap:8px}.topbar .account-chip{flex:1 1 auto;min-height:40px;display:inline-flex;align-items:center}.department-grid{grid-template-columns:1fr;gap:14px}.department-content,.surface,.metric,.auth-panel{padding:14px}.auth-screen{align-items:start}.auth-panel{margin-top:12px;gap:16px}.auth-brand{align-items:flex-start}.auth-logo{width:56px;height:56px}.auth-brand h1{font-size:1.45rem;line-height:1.15}.segmented{grid-template-columns:1fr}.button{width:100%}.align-end{justify-self:start}input,select,textarea,.button{min-height:44px}.material-item,.admin-list-item{grid-template-columns:minmax(0,1fr);align-items:start}.material-item .badge,.admin-list-item .badge,.admin-list-item strong,.admin-list-item .row-actions{grid-column:auto;justify-self:start}.row-actions,.actions-cell{width:100%;justify-content:flex-start;flex-wrap:wrap}.admin-list-item .row-actions .icon-button{flex:1 1 44px}.department-detail-grid,.department-detail dl{grid-template-columns:1fr}.payment-summary{padding:14px}.stats-grid{grid-template-columns:1fr}.table-wrap{margin-inline:-14px;border-left:0;border-right:0;border-radius:0}table{min-width:680px;font-size:.92rem}th,td{padding:11px 12px}.audit-table{min-width:860px}.metadata-cell{max-width:220px}.settings-layout{gap:14px}.color-field{grid-template-columns:48px minmax(0,1fr)}.login-preview{min-height:240px;padding:12px}.login-preview-card{padding:14px}.reader-toolbar{grid-template-columns:1fr}.reader-screen{height:calc(100vh - 28px);min-height:480px}.reader-frame,.reader-document,.reader-media,.secure-pdf-viewer,.secure-text-document{min-height:0}.secure-pdf-viewer{padding:10px}.pdf-pages{gap:12px}.secure-text-document{padding:18px}.watermark-layer{grid-template-columns:repeat(2,minmax(180px,1fr));gap:20px}}@media(max-width:420px){.main,.auth-screen,.sidebar{padding:10px}.nav-list{margin-inline:-10px;padding-inline:10px}.topbar{margin-inline:-10px;margin-top:-10px;padding:12px 10px}.announcement-bar{margin-inline:-2px}.section-heading{gap:10px}.section-heading svg{width:22px;height:22px}.department-card,.surface,.payment-summary,.metric,.auth-panel,.reader-frame{border-radius:8px}.table-wrap{margin-inline:-10px}.file-upload-box{grid-template-columns:1fr}.file-upload-box svg{display:none}.icon-button{width:44px;height:44px}.watermark-layer{grid-template-columns:1fr;font-size:.86rem}}@media print{body.content-protected *{visibility:hidden!important}body.content-protected:before{content:"Printing is disabled for protected learning materials.";visibility:visible!important;display:block;padding:32px;color:#111827;font:700 18px/1.4 Arial,sans-serif}}@media(prefers-reduced-motion:reduce){.announcement-track{animation:none;transform:none}.announcement-group span{padding-inline:12px}.announcement-group span:after{display:none}}