:root{
  --accent:#7c5cff;
  --accent-rgb:124,92,255;
  --bg:#070910;
  --bg-soft:#0d111b;
  --panel:rgba(18,23,35,.78);
  --panel-strong:rgba(20,25,39,.94);
  --panel-soft:rgba(255,255,255,.045);
  --line:rgba(255,255,255,.09);
  --line-strong:rgba(255,255,255,.15);
  --text:#f4f6ff;
  --muted:#9ca7bc;
  --muted-2:#778197;
  --success:#52d99d;
  --warning:#ffbe66;
  --danger:#ff667f;
  --shadow:0 24px 80px rgba(0,0,0,.36);
  --radius:22px;
  --sidebar:260px;
  --topbar:72px;
}
html[data-theme="light"]{
  --bg:#eef2f8;
  --bg-soft:#e6ebf4;
  --panel:rgba(255,255,255,.78);
  --panel-strong:rgba(255,255,255,.96);
  --panel-soft:rgba(20,28,45,.045);
  --line:rgba(19,28,45,.10);
  --line-strong:rgba(19,28,45,.16);
  --text:#161b28;
  --muted:#687287;
  --muted-2:#8b94a5;
  --shadow:0 24px 70px rgba(44,56,80,.15);
  color-scheme:light;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;color-scheme:dark}
body{margin:0;min-height:100vh;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
body.menu-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit}
button{color:inherit}
img{max-width:100%}
::selection{background:rgba(var(--accent-rgb),.35);color:#fff}
:focus-visible{outline:3px solid rgba(var(--accent-rgb),.42);outline-offset:2px}
.ui-icon{width:20px;height:20px;display:block;flex:0 0 auto}
.skip-link{position:fixed;left:14px;top:-70px;z-index:999;padding:10px 14px;border-radius:10px;background:var(--text);color:var(--bg);font-weight:800;transition:.2s}
.skip-link:focus{top:14px}
.ambient{position:fixed;inset:0;z-index:-2;overflow:hidden;pointer-events:none;background:linear-gradient(180deg,var(--bg),var(--bg-soft) 68%,var(--bg))}
.ambient:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.012) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.012) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(to bottom,black,transparent 85%)}
.ambient i{position:absolute;border-radius:50%;filter:blur(80px);opacity:.42;animation:floatGlow 18s ease-in-out infinite}
.ambient i:nth-child(1){width:420px;height:420px;left:-160px;top:-100px;background:rgba(var(--accent-rgb),.30)}
.ambient i:nth-child(2){width:360px;height:360px;right:-130px;top:80px;background:rgba(54,141,255,.20);animation-delay:-7s}
.ambient i:nth-child(3){width:300px;height:300px;left:48%;bottom:-170px;background:rgba(43,207,174,.12);animation-delay:-12s}
@keyframes floatGlow{50%{transform:translate3d(30px,24px,0) scale(1.08)}}
.page-progress{position:fixed;left:0;top:0;height:2px;width:0;background:linear-gradient(90deg,var(--accent),#62c8ff);z-index:120;box-shadow:0 0 16px rgba(var(--accent-rgb),.9)}
.glass{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);backdrop-filter:blur(22px);-webkit-backdrop-filter:blur(22px)}

/* Top application bar */
.topbar{height:var(--topbar);position:sticky;top:0;z-index:60;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-width:0 0 1px;background:rgba(9,12,19,.78)}
html[data-theme="light"] .topbar{background:rgba(244,247,252,.84)}
.topbar-left,.top-actions{display:flex;align-items:center;min-width:0}
.topbar-left{gap:11px}.top-actions{gap:9px}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand img,.brand-mark{width:39px;height:39px;border-radius:13px;flex:0 0 auto}
.brand img{object-fit:contain;background:rgba(255,255,255,.05)}
.brand-mark{display:grid;place-items:center;color:#fff;font-weight:900;background:linear-gradient(135deg,var(--accent),#58baff);box-shadow:0 10px 28px rgba(var(--accent-rgb),.32)}
.brand-copy{display:grid;line-height:1.12;min-width:0}
.brand-copy b{font-size:14px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:230px}
.brand-copy small{font-size:10px;color:var(--muted);margin-top:4px;text-transform:uppercase;letter-spacing:.1em}
.icon-btn{width:41px;height:41px;border:1px solid var(--line);border-radius:13px;background:var(--panel-soft);display:grid;place-items:center;cursor:pointer;transition:.18s ease}
.icon-btn:hover{transform:translateY(-1px);background:rgba(var(--accent-rgb),.11);border-color:rgba(var(--accent-rgb),.28)}
.mobile-menu-btn{display:none}.desktop-collapse-btn{display:grid}
.section-pill,.connection-pill{display:flex;align-items:center;gap:8px;border:1px solid var(--line);background:var(--panel-soft);border-radius:999px;color:var(--muted);font-size:12px;font-weight:750}
.section-pill{margin-left:7px;padding:8px 11px}.section-pill i,.connection-pill i{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px rgba(var(--accent-rgb),.8)}
.connection-pill{padding:8px 11px}.connection-pill i{background:var(--success);box-shadow:0 0 12px rgba(82,217,157,.7)}
.connection-pill.offline i{background:var(--danger);box-shadow:none}.connection-pill.offline span{color:var(--danger)}
.user-chip{display:flex;align-items:center;gap:9px;padding:5px 10px 5px 5px;border-radius:14px;border:1px solid var(--line);background:var(--panel-soft)}
.user-chip>i{font-style:normal;width:31px;height:31px;border-radius:10px;display:grid;place-items:center;font-size:12px;font-weight:900;background:rgba(var(--accent-rgb),.18);color:#c9bfff}
.user-chip>span{display:grid;line-height:1.15}.user-chip b{font-size:12px;max-width:150px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-chip small{font-size:10px;color:var(--muted);text-transform:capitalize;margin-top:3px}

/* Main shell and navigation */
.shell{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr);min-height:calc(100vh - var(--topbar));transition:grid-template-columns .22s ease}
.sidebar{position:sticky;top:var(--topbar);height:calc(100vh - var(--topbar));padding:17px 13px 14px;border-width:0 1px 0 0;overflow-y:auto;overflow-x:hidden;box-shadow:none;background:rgba(11,15,24,.70)}
html[data-theme="light"] .sidebar{background:rgba(247,249,253,.72)}
.sidebar-head{display:grid;padding:2px 11px 15px}.sidebar-head span{font-size:12px;font-weight:850}.sidebar-head small{font-size:10px;color:var(--muted);margin-top:4px}
.sidebar nav{display:grid;gap:5px}.nav-group-label{display:block;padding:18px 11px 7px;color:var(--muted-2);font-size:9px;font-weight:900;text-transform:uppercase;letter-spacing:.15em}
.nav-link{position:relative;display:flex;align-items:center;gap:11px;min-height:44px;padding:9px 11px;border:1px solid transparent;border-radius:14px;color:var(--muted);font-size:13px;font-weight:750;transition:.18s ease;overflow:hidden}
.nav-link:hover{color:var(--text);background:var(--panel-soft);border-color:var(--line)}
.nav-link.active{color:#fff;background:linear-gradient(135deg,rgba(var(--accent-rgb),.28),rgba(var(--accent-rgb),.12));border-color:rgba(var(--accent-rgb),.40);box-shadow:inset 0 1px 0 rgba(255,255,255,.08),0 10px 28px rgba(var(--accent-rgb),.13)}
html[data-theme="light"] .nav-link.active{color:#211a3f}
.nav-link.active:before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:0 6px 6px 0;background:linear-gradient(var(--accent),#61c6ff);box-shadow:0 0 14px rgba(var(--accent-rgb),.75)}
.nav-icon{width:25px;height:25px;display:grid;place-items:center;flex:0 0 auto}.nav-icon .ui-icon{width:18px;height:18px}.nav-link b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nav-active-dot{margin-left:auto;width:5px;height:5px;border-radius:50%;background:#fff;box-shadow:0 0 11px #fff}
.sidebar-foot{display:flex;align-items:center;gap:9px;margin-top:20px;padding:12px 10px;border-radius:14px;border:1px solid var(--line);background:var(--panel-soft)}
.sidebar-foot>i{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 12px rgba(82,217,157,.7)}
.sidebar-foot span{display:grid;line-height:1.15}.sidebar-foot b{font-size:11px}.sidebar-foot small{font-size:9px;color:var(--muted);margin-top:3px}
.sidebar-backdrop{display:none}
.main-content{min-width:0;width:100%;max-width:1680px;margin:0 auto;padding:30px 30px 96px}
.guest-main{min-height:100vh;display:grid;place-items:center;padding:24px}
.mobile-dock{display:none}
body.sidebar-collapsed .shell{grid-template-columns:82px minmax(0,1fr)}
body.sidebar-collapsed .sidebar{padding-left:10px;padding-right:10px}
body.sidebar-collapsed .sidebar-head,body.sidebar-collapsed .nav-group-label,body.sidebar-collapsed .nav-link b,body.sidebar-collapsed .nav-active-dot,body.sidebar-collapsed .sidebar-foot span{display:none}
body.sidebar-collapsed .nav-link{justify-content:center;padding:9px}.sidebar-precollapsed body .shell{grid-template-columns:82px minmax(0,1fr)}

/* Page structure */
.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:24px}
.page-heading-copy{min-width:0}.page-kicker,.kicker{display:block;color:#aaa0ff;font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.15em;margin-bottom:8px}
.page-head h1{margin:0;font-size:clamp(28px,3.1vw,42px);line-height:1.02;letter-spacing:-.045em}.page-head p{margin:9px 0 0;color:var(--muted);font-size:14px;max-width:760px;line-height:1.65}
.page-actions,.row-actions{display:flex;align-items:center;gap:9px;flex-wrap:wrap}
.grid{display:grid;gap:16px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:22px}
.metric{position:relative;overflow:hidden;min-height:132px;padding:19px;border-radius:20px}
.metric:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(255,255,255,.035),transparent 55%);pointer-events:none}.metric span{position:relative;display:block;color:var(--muted);font-size:11px;font-weight:800;text-transform:uppercase;letter-spacing:.08em}.metric strong{position:relative;display:block;margin:13px 0 5px;font-size:clamp(28px,3vw,38px);line-height:1;letter-spacing:-.04em}.metric small{position:relative;color:var(--muted-2);font-size:11px}.metric-glow{position:absolute;right:-34px;bottom:-44px;width:120px;height:120px;border-radius:50%;background:rgba(var(--accent-rgb),.16);filter:blur(18px)}
.card{border-radius:var(--radius);padding:21px;min-width:0}.card h2,.card h3{margin-top:0;letter-spacing:-.02em}.card h2{font-size:18px}.card h3{font-size:16px}.card p{line-height:1.65}
.card.glass,.metric.glass,.class-card.glass,.content-block.glass{transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}.card.glass:hover,.class-card.glass:hover{border-color:rgba(var(--accent-rgb),.24);box-shadow:0 28px 78px rgba(0,0,0,.40)}
.muted{color:var(--muted)}
.empty{padding:46px 22px;text-align:center;color:var(--muted);border:1px dashed var(--line-strong);border-radius:20px;background:var(--panel-soft)}

/* Hero surfaces */
.dashboard-hero{position:relative;overflow:hidden;display:grid;grid-template-columns:minmax(0,1.35fr) minmax(220px,.65fr);gap:20px;align-items:center;padding:28px;margin-bottom:18px;border-radius:28px}
.dashboard-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 30%,rgba(var(--accent-rgb),.22),transparent 42%),linear-gradient(135deg,rgba(255,255,255,.035),transparent 60%)}
.hero-copy,.hero-visual,.hero-stats{position:relative}.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;padding:7px 10px;border:1px solid rgba(var(--accent-rgb),.25);border-radius:999px;color:#c8c0ff;background:rgba(var(--accent-rgb),.09);font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.13em}.hero-eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 12px rgba(82,217,157,.65)}
.hero-copy h2{font-size:clamp(28px,4vw,50px);line-height:1.01;letter-spacing:-.055em;margin:17px 0 12px;max-width:800px}.hero-copy p{margin:0;color:var(--muted);line-height:1.7;max-width:700px}.hero-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:21px}.hero-date{color:var(--muted);font-size:12px;margin-left:4px}
.hero-visual{min-height:190px;display:grid;place-items:center}.hero-orb{width:145px;height:145px;border-radius:45px;display:grid;place-items:center;font-size:52px;font-weight:950;color:#fff;background:linear-gradient(145deg,var(--accent),#55b9ff);box-shadow:0 26px 75px rgba(var(--accent-rgb),.42),inset 0 1px 1px rgba(255,255,255,.35);transform:rotate(8deg)}
.hero-orb:before,.hero-orb:after{content:"";position:absolute;border:1px solid rgba(var(--accent-rgb),.32);border-radius:50%;animation:orbitPulse 3s ease-in-out infinite}.hero-orb:before{width:195px;height:195px}.hero-orb:after{width:245px;height:245px;animation-delay:-1.5s}@keyframes orbitPulse{50%{transform:scale(1.05);opacity:.45}}
.learner-hero{grid-template-columns:minmax(0,1fr) auto}.hero-stats{display:grid;grid-template-columns:repeat(2,minmax(110px,1fr));gap:10px}.hero-stats div{padding:17px;border:1px solid var(--line);border-radius:18px;background:var(--panel-soft)}.hero-stats strong{display:block;font-size:28px;letter-spacing:-.04em}.hero-stats span{display:block;margin-top:4px;color:var(--muted);font-size:11px}

/* Buttons and fields */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:42px;padding:10px 15px;border:1px solid rgba(255,255,255,.10);border-radius:13px;background:linear-gradient(135deg,var(--accent),#5d9dff);color:#fff;font-weight:850;font-size:13px;cursor:pointer;box-shadow:0 12px 30px rgba(var(--accent-rgb),.23);transition:.18s ease}
.btn:hover{transform:translateY(-1px);filter:brightness(1.06);box-shadow:0 16px 38px rgba(var(--accent-rgb),.30)}.btn:active{transform:translateY(0)}
.btn.secondary{background:var(--panel-soft);color:var(--text);border-color:var(--line);box-shadow:none}.btn.secondary:hover{border-color:rgba(var(--accent-rgb),.32);background:rgba(var(--accent-rgb),.09)}
.btn.danger{background:linear-gradient(135deg,#c63756,#ff667f);box-shadow:0 12px 30px rgba(220,55,88,.20)}.btn.small{min-height:34px;padding:7px 10px;border-radius:10px;font-size:11px}.btn.loading{opacity:.7;pointer-events:none}.btn.loading:after{content:"";width:13px;height:13px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.field{display:grid;gap:7px;margin-bottom:15px}.field label{color:var(--muted);font-size:11px;font-weight:850;text-transform:uppercase;letter-spacing:.055em}.input,.field input,.field textarea,.field select,.searchbar input{width:100%;border:1px solid var(--line);background:rgba(5,8,14,.56);color:var(--text);border-radius:13px;padding:12px 13px;outline:none;transition:.18s ease}
html[data-theme="light"] .input,html[data-theme="light"] .field input,html[data-theme="light"] .field textarea,html[data-theme="light"] .field select,html[data-theme="light"] .searchbar input{background:rgba(255,255,255,.7)}
.field input:focus,.field textarea:focus,.field select:focus,.searchbar input:focus{border-color:rgba(var(--accent-rgb),.60);box-shadow:0 0 0 4px rgba(var(--accent-rgb),.11)}.field textarea{min-height:115px;resize:vertical}.field select option{background:#121724;color:#fff}
.searchbar{display:flex;gap:10px}.searchbar input{flex:1;min-width:0}

/* Tables */
.table-wrap{position:relative;overflow:auto;border:1px solid var(--line);border-radius:18px;background:rgba(0,0,0,.06);scrollbar-width:thin;scrollbar-color:rgba(var(--accent-rgb),.5) transparent}.table{width:100%;border-collapse:collapse;min-width:760px}.table th,.table td{text-align:left;padding:13px 14px;border-bottom:1px solid var(--line);vertical-align:middle}.table tr:last-child td{border-bottom:0}.table th{position:sticky;top:0;z-index:1;background:var(--panel-strong);color:var(--muted-2);font-size:10px;font-weight:900;text-transform:uppercase;letter-spacing:.085em}.table td{font-size:13px}.table tbody tr{transition:.16s}.table tbody tr:hover{background:rgba(var(--accent-rgb),.055)}
.badge{display:inline-flex;align-items:center;padding:5px 9px;border-radius:999px;background:var(--panel-soft);border:1px solid var(--line);font-size:10px;font-weight:850;text-transform:capitalize}.badge.live{background:rgba(82,217,157,.10);border-color:rgba(82,217,157,.25);color:#83e8b8}.badge.draft{background:rgba(255,190,102,.10);border-color:rgba(255,190,102,.24);color:#ffd08d}

/* Auth */
.auth-card{width:min(520px,100%);padding:30px;border-radius:28px;position:relative;overflow:hidden}.auth-card:before{content:"";position:absolute;width:240px;height:240px;right:-110px;top:-120px;border-radius:50%;background:rgba(var(--accent-rgb),.24);filter:blur(35px)}.auth-card>*{position:relative}.auth-card .brand{margin-bottom:26px}.auth-card h1{font-size:clamp(29px,6vw,40px);letter-spacing:-.045em;margin:0 0 8px}.auth-card>p{color:var(--muted);line-height:1.6;margin:0 0 24px}.footer-note{margin-top:22px;color:var(--muted-2);font-size:11px;text-align:center}

/* Classes, media and content */
.class-card{overflow:hidden;border-radius:21px;min-width:0}.class-cover{position:relative;aspect-ratio:16/8.4;display:flex;align-items:flex-end;padding:18px;background:linear-gradient(135deg,rgba(var(--accent-rgb),.80),#1a2c49);background-size:cover;background-position:center}.class-cover:after{content:"";position:absolute;inset:35% 0 0;background:linear-gradient(transparent,rgba(2,4,9,.87))}.class-cover h3{position:relative;z-index:1;margin:0;color:#fff;font-size:19px;text-shadow:0 3px 18px #000}.class-card .body{padding:17px}.class-card .body p{font-size:13px}.class-card .body small{color:var(--muted-2)}
.progress{height:8px;border-radius:999px;overflow:hidden;background:rgba(255,255,255,.07);margin:10px 0}.progress i{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--accent),#61c8ff);box-shadow:0 0 12px rgba(var(--accent-rgb),.5)}
.media-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}.media-item{overflow:hidden;border-radius:18px}.media-item img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover;background:#0d121d}.media-item .body{padding:13px}.media-item small{display:block;color:var(--muted-2);margin-top:5px}
.content-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px}.lesson-content{display:grid;gap:17px}.content-block{border-radius:20px;padding:21px;overflow:hidden}.content-block h2,.content-block h3{margin-top:0}.content-block p,.content-block li{line-height:1.75}.content-block img{display:block;max-width:100%;border-radius:15px}.content-block iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:15px}.note-box{border-left:3px solid var(--accent);background:rgba(var(--accent-rgb),.08)}.warning-box{border-left:3px solid var(--warning);background:rgba(255,190,102,.07)}
.lecture-nav{position:sticky;top:92px;height:max-content;padding:17px;border-radius:19px}.lecture-nav a{display:block;padding:10px 11px;border-radius:11px;color:var(--muted);font-size:12px;line-height:1.45}.lecture-nav a:hover{color:var(--text);background:var(--panel-soft)}
.player-shell{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:18px;background:#000}.player-shell iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.player-cover{position:absolute;inset:0;display:grid;place-items:center;cursor:pointer;background:radial-gradient(circle at center,rgba(var(--accent-rgb),.28),rgba(0,0,0,.82))}.player-cover button{width:70px;height:70px;border-radius:50%;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.13);color:#fff;font-size:24px;cursor:pointer;box-shadow:0 15px 45px rgba(0,0,0,.35);backdrop-filter:blur(10px)}
.tabs{display:flex;gap:8px;overflow:auto;margin-bottom:18px;padding-bottom:2px}.tabs a{white-space:nowrap;padding:9px 12px;border-radius:11px;background:var(--panel-soft);border:1px solid var(--line);font-size:12px}.tabs a.active{background:linear-gradient(135deg,var(--accent),#5d9dff);border-color:transparent;color:#fff}
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#06080d;color:#c5d0ff;border:1px solid var(--line);padding:14px;border-radius:13px;overflow:auto;font-size:12px}

/* Editor */
.block-editor{display:grid;gap:12px}.editor-block{padding:15px;border-radius:17px;background:var(--panel-soft);border:1px solid var(--line)}.editor-block:focus-within{border-color:rgba(var(--accent-rgb),.36)}.editor-block-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px}.editor-block textarea{min-height:140px}

/* Notifications */
.toast{position:fixed;right:18px;top:88px;z-index:150;display:flex;align-items:flex-start;gap:12px;max-width:min(390px,calc(100vw - 28px));padding:14px 14px 14px 16px;border-radius:15px;background:var(--panel-strong);border:1px solid var(--line-strong);box-shadow:0 22px 65px rgba(0,0,0,.42);animation:toastAway .35s ease 5s forwards}.toast span{flex:1;font-size:13px;line-height:1.45}.toast button{width:28px;height:28px;display:grid;place-items:center;border:0;border-radius:8px;background:var(--panel-soft);cursor:pointer}.toast button .ui-icon{width:15px;height:15px}.toast.success{border-color:rgba(82,217,157,.35)}.toast.error{border-color:rgba(255,102,127,.40)}.toast.dismissed{display:none}@keyframes toastAway{to{opacity:0;transform:translateY(-8px);pointer-events:none}}

/* Mobile dock */
.mobile-dock{position:fixed;left:10px;right:10px;bottom:max(10px,env(safe-area-inset-bottom));z-index:75;height:68px;border-radius:21px;padding:7px;grid-template-columns:repeat(5,1fr);background:rgba(13,17,27,.90)}
html[data-theme="light"] .mobile-dock{background:rgba(255,255,255,.92)}.mobile-dock a,.mobile-dock button{min-width:0;border:0;border-radius:14px;background:transparent;color:var(--muted);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;font-size:9px;font-weight:800;cursor:pointer}.mobile-dock .ui-icon{width:19px;height:19px}.mobile-dock a.active{color:#fff;background:linear-gradient(135deg,rgba(var(--accent-rgb),.38),rgba(var(--accent-rgb),.18));box-shadow:inset 0 1px 0 rgba(255,255,255,.10)}
html[data-theme="light"] .mobile-dock a.active{color:#2c2158}

@media(max-width:1180px){
  :root{--sidebar:235px}.metrics,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.content-layout{grid-template-columns:1fr}.lecture-nav{position:static}.section-pill{display:none}
}
@media(max-width:850px){
  :root{--topbar:66px}.topbar{padding:0 13px}.desktop-collapse-btn{display:none}.mobile-menu-btn{display:grid}.brand-copy small,.connection-pill,.user-chip>span{display:none}.user-chip{padding:4px}.user-chip>i{width:31px;height:31px}.brand-copy b{max-width:160px}.shell{display:block}.main-content{padding:22px 14px 105px}.sidebar{position:fixed;left:10px;top:76px;z-index:90;width:min(310px,calc(100vw - 20px));height:calc(100dvh - 88px);border:1px solid var(--line-strong);border-radius:22px;transform:translateX(calc(-100% - 22px));transition:transform .22s ease;box-shadow:0 30px 90px rgba(0,0,0,.55);background:var(--panel-strong)}.sidebar.open{transform:none}.sidebar-backdrop{position:fixed;display:block;inset:0;z-index:80;background:rgba(0,0,0,.58);opacity:0;visibility:hidden;transition:.2s}.sidebar-backdrop.open{opacity:1;visibility:visible}.mobile-dock{display:grid}.page-head{flex-direction:column;align-items:stretch}.page-actions{width:100%}.page-actions .btn{flex:1}.dashboard-hero,.learner-hero{grid-template-columns:1fr}.hero-visual{display:none}.hero-stats{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-2,.grid-3,.metrics,.split{grid-template-columns:1fr}.table-wrap:after{content:"Swipe table horizontally →";position:sticky;left:12px;display:inline-block;margin:8px 0 10px;padding:5px 8px;border-radius:999px;background:var(--panel-strong);color:var(--muted);font-size:9px}.auth-card{padding:23px}.toast{top:78px;right:14px}
}
@media(max-width:520px){
  .top-actions{gap:6px}.brand-mark,.brand img{width:36px;height:36px}.brand-copy b{max-width:118px;font-size:12px}.topbar .icon-btn{width:38px;height:38px}.user-chip{display:none}.main-content{padding-top:18px}.page-head{margin-bottom:18px}.page-head h1{font-size:29px}.page-head p{font-size:13px}.dashboard-hero{padding:21px;border-radius:22px}.hero-copy h2{font-size:31px}.hero-actions .btn{width:100%}.hero-date{width:100%;margin:2px 0 0}.card{padding:17px;border-radius:19px}.metric{min-height:114px;padding:16px}.metric strong{font-size:30px}.media-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.media-item .body{padding:10px}.editor-block-head{align-items:flex-start;flex-direction:column}.searchbar{flex-direction:column}.searchbar .btn{width:100%}.mobile-dock{left:7px;right:7px;bottom:max(7px,env(safe-area-inset-bottom));height:66px;border-radius:19px}.mobile-dock span{max-width:55px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.content-block{padding:17px}.class-cover{aspect-ratio:16/9}.table{min-width:650px}
}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}