@font-face{font-family:'Almarai';src:url('/fonts/Almarai-Light.ttf') format('truetype');font-weight:300;font-display:swap}
@font-face{font-family:'Almarai';src:url('/fonts/Almarai-Regular.ttf') format('truetype');font-weight:400;font-display:swap}
@font-face{font-family:'Almarai';src:url('/fonts/Almarai-Bold.ttf') format('truetype');font-weight:700;font-display:swap}
@font-face{font-family:'Almarai';src:url('/fonts/Almarai-ExtraBold.ttf') format('truetype');font-weight:800;font-display:swap}
:root{
  --yellow:#FFE14D; --navy:#0E1424; --blue:#3FA7D6; --blue-dark:#1F7FAD; --paper:#FFFDF3;
  --line:#0E1424; --muted:#5B5A4E; --soft:#FFF4B8; --ok:#1E8E5A; --bad:#D9534F; --card:#FFFFFF;
  --radius:18px; --text:#0E1424; --surface:#FFFFFF; --ink:#0E1424;
  --ok-bg:#DDF5E8; --bad-bg:#FBE3E2; --half:#B7791F; --half-bg:#FFF1CC; --note-bg:#E3F2FA; --note:#1F6E94;
}
html[data-theme="dark"]{
  --paper:#0B1020; --card:#151C30; --surface:#151C30; --text:#EEF1F7; --line:#56627F; --muted:#A3ACC2;
  --soft:#2A2614; --ok-bg:#12352A; --bad-bg:#3A1C1F; --half-bg:#3A2F12; --half:#F2C14E; --note-bg:#14324A; --note:#8DD0F2;
  color-scheme:dark;
}
html[data-theme="dark"] .tab.active,html[data-theme="dark"] .tab.active:hover{background:var(--yellow);color:var(--ink)}
html[data-theme="dark"] .card{box-shadow:5px 5px 0 #000}
html[data-theme="dark"] .btn{box-shadow:3px 3px 0 #000;border-color:#000}
html[data-theme="dark"] .btn.secondary{border-color:var(--line)}
html[data-theme="dark"] .prose code{background:#222A40}
html[data-theme="dark"] a{color:#8DD0F2}
*{box-sizing:border-box}
html,body{margin:0}
body{font-family:'Almarai',system-ui,sans-serif;background:var(--paper);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--blue-dark)}
a:hover{color:var(--text)}
button,input,select,textarea{font:inherit;color:inherit}
img{max-width:100%}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.hidden{display:none !important}

/* top bar */
.topbar{background:var(--ink);color:#EEF1F7}
.topbar .container{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:68px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:#EEF1F7;text-decoration:none;font-weight:700;font-size:22px}
.brand img{height:40px;width:auto;display:block}
.topbar nav{display:flex;gap:6px;flex-wrap:wrap}
.topbar nav a,.topbar .user{color:#EEF1F7;text-decoration:none;padding:8px 14px;border-radius:999px;font-size:15px}
.topbar nav a.active,.topbar nav a:hover{background:rgba(255,225,77,.16);color:var(--yellow)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:0 20px;border-radius:999px;border:2.5px solid var(--line);background:var(--yellow);color:var(--ink);font-weight:700;cursor:pointer;text-decoration:none;box-shadow:3px 3px 0 var(--line);transition:transform .08s, box-shadow .08s}
.btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--line);color:var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--line)}
.btn.secondary{background:var(--surface);color:var(--text)}
.btn.secondary:hover{color:var(--text)}
.btn.blue{background:var(--blue)}
.btn.ghost{background:transparent;box-shadow:none;border-color:transparent;text-decoration:underline}
.btn.danger{background:var(--surface);color:var(--bad);border-color:var(--bad);box-shadow:3px 3px 0 var(--bad)}
.btn.small{min-height:36px;padding:0 14px;font-size:14px}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* cards */
.card{background:var(--card);border:2.5px solid var(--line);border-radius:var(--radius);box-shadow:5px 5px 0 var(--line);padding:22px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.page{padding-top:32px;padding-bottom:80px}
h1,h2,h3{line-height:1.3;margin:0 0 10px}
h1{font-size:30px}
.lead{color:var(--muted);margin:0 0 24px}
.pill{display:inline-block;padding:2px 12px;border-radius:999px;font-size:13px;font-weight:700;border:2px solid var(--line);background:var(--surface)}
.pill.yellow{background:var(--yellow);color:var(--ink)}
.pill.blue{background:var(--blue);color:var(--ink)}
.muted{color:var(--muted)}

/* subject cards */
.subject{display:flex;flex-direction:column;gap:12px;text-decoration:none;color:var(--text);transition:transform .1s}
.subject:hover{transform:translate(-2px,-2px);color:var(--text)}
.subject .name{font-size:24px;font-weight:700}
.subject .meta{display:flex;gap:8px;flex-wrap:wrap}

/* lecture list */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.tab{display:inline-flex;align-items:center;min-height:44px;padding:0 18px;border-radius:999px;border:2.5px solid var(--line);background:var(--surface);color:var(--text);font-weight:700;cursor:pointer;text-decoration:none}
.tab:hover{background:var(--soft);color:var(--text)}
.tab.active,.tab.active:hover{background:var(--ink);color:var(--yellow)}
.lec-list{display:flex;flex-direction:column;gap:12px}
.lec{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;text-decoration:none;color:var(--text)}
.lec:hover{color:var(--text);background:var(--soft)}
.lec .t{font-weight:700;font-size:18px}
.score{font-weight:700;padding:4px 12px;border-radius:999px;background:var(--yellow);color:var(--ink);border:2px solid var(--line);white-space:nowrap}

/* lecture page */
.lec-head{background:var(--yellow);border-bottom:2.5px solid var(--line);color:var(--ink)}
.lec-head .muted{color:#4A4632}
.lec-head .pill{background:#fff;color:var(--ink);border-color:var(--ink)}
.lec-head .container{padding:28px 20px}
.crumbs{font-size:14px;margin-bottom:6px}
.crumbs a{color:inherit}
.prose{font-size:17px}
.prose h2{font-size:22px;margin-top:26px}
.prose h3{font-size:19px;margin-top:20px}
.prose table{border-collapse:collapse;width:100%;margin:16px 0;display:block;overflow-x:auto}
.prose th,.prose td{border:2px solid var(--line);padding:8px 12px;text-align:start}
.prose th{background:var(--soft)}
.prose blockquote{margin:16px 0;padding:12px 18px;border-radius:14px;background:var(--soft);border:2px solid var(--line)}
.prose code{background:#F3F1E4;padding:1px 6px;border-radius:6px}
.prose mark{background:var(--yellow);padding:0 4px;border-radius:4px}
.focus-box{background:var(--yellow);color:var(--ink);border:2.5px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:5px 5px 0 var(--line)}
.focus-box .label{display:inline-block;background:var(--ink);color:var(--yellow);font-weight:700;padding:4px 14px;border-radius:999px;margin-bottom:10px}

/* quiz */
.q-card{max-width:760px}
.q-progress{height:12px;border:2px solid var(--line);border-radius:999px;background:var(--surface);overflow:hidden;margin-bottom:18px}
.q-progress span{display:block;height:100%;background:var(--blue)}
.q-stem{font-size:19px;font-weight:700;margin-bottom:16px;direction:ltr;text-align:left}
.opts{display:flex;flex-direction:column;gap:10px}
.opt{direction:ltr;text-align:left;min-height:52px;padding:10px 16px;border:2.5px solid var(--line);border-radius:14px;background:var(--surface);cursor:pointer;font-size:16px;display:flex;gap:10px;align-items:center}
.opt:hover:not(:disabled){background:var(--soft)}
.opt .k{font-weight:700;width:26px;height:26px;border-radius:50%;border:2px solid var(--line);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;font-size:13px}
.opt.correct{background:var(--ok-bg);border-color:var(--ok)}
.opt.wrong{background:var(--bad-bg);border-color:var(--bad)}
.opt:disabled{cursor:default}
.explain{margin-top:16px;padding:16px 18px;border-radius:14px;background:var(--soft);border:2px solid var(--line)}
.explain .verdict{font-weight:700;margin-bottom:6px}
.q-nav{display:flex;justify-content:space-between;gap:10px;margin-top:18px;flex-wrap:wrap}

/* practical */
.prac{position:relative;display:inline-block;max-width:100%;border:2.5px solid var(--line);border-radius:14px;background:var(--surface)}
.prac img{display:block;max-height:75vh;width:auto;border-radius:12px}
.pin{color:var(--ink);position:absolute;transform:translate(-50%,-50%);min-width:30px;height:30px;padding:0 8px;border-radius:999px;border:2.5px solid var(--line);background:var(--yellow);font-weight:700;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;white-space:nowrap;box-shadow:2px 2px 0 var(--line)}
.pin.open{background:#fff;z-index:2}
.pin.edge-l{transform:translate(-12%,-50%)}
.pin.edge-r{transform:translate(-88%,-50%)}
.pin.open::after{content:attr(data-text);margin-inline-start:6px;font-weight:700}
.prac-tools{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0 26px}

/* forms */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-weight:700;font-size:15px}
.input,textarea.input,select.input{width:100%;min-height:46px;padding:10px 14px;border:2.5px solid var(--line);border-radius:12px;background:var(--surface)}
textarea.input{min-height:140px;resize:vertical;line-height:1.6}
.input:focus{outline:3px solid var(--blue);outline-offset:1px}
.error{color:var(--bad);font-weight:700;min-height:24px}

/* login */
.login-wrap{min-height:100vh;display:flex;flex-wrap:wrap}
.login-hero{flex:1 1 420px;background:var(--yellow);border-inline-end:2.5px solid var(--line);display:flex;flex-direction:column;justify-content:center;padding:48px 40px;gap:18px}
.login-hero img{width:min(380px,80%)}
.login-hero p{font-size:20px;margin:0;max-width:440px}
.login-form{flex:1 1 380px;display:flex;align-items:center;justify-content:center;padding:40px 24px}
.login-form .card{width:100%;max-width:420px}
.or{display:flex;align-items:center;gap:12px;color:var(--muted);margin:18px 0}
.or::before,.or::after{content:"";flex:1;height:2px;background:#E4E0C8}

/* admin */
.kpis{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));margin-bottom:24px}
.kpi .n{font-size:34px;font-weight:700;line-height:1.1}
.kpi .l{color:var(--muted);font-size:14px}
.bars{display:flex;align-items:flex-end;gap:6px;height:160px;padding-top:10px}
.bars .b{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:4px;height:100%}
.bars .b span{display:block;width:100%;background:var(--blue);border:2px solid var(--line);border-radius:6px 6px 0 0;min-height:2px}
.bars .b small{font-size:11px;color:var(--muted)}
.table-wrap{overflow-x:auto}
table.data{width:100%;border-collapse:collapse;font-size:15px}
table.data th,table.data td{padding:10px 12px;border-bottom:2px solid #EEEAD3;text-align:start;white-space:nowrap}
table.data th{font-size:13px;color:var(--muted)}
table.data tr.click{cursor:pointer}
table.data tr.click:hover td{background:var(--soft)}
.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.spread{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}
.stack{display:flex;flex-direction:column;gap:16px}
.subj-admin .lecs{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.subj-admin .lecs a{display:flex;justify-content:space-between;gap:8px;padding:10px 14px;border:2px solid var(--line);border-radius:12px;text-decoration:none;color:var(--text);background:var(--surface)}
.subj-admin .lecs a:hover{background:var(--soft)}
.q-edit{border:2px dashed var(--line);border-radius:14px;padding:16px;background:var(--surface)}
.opt-edit{display:flex;gap:8px;align-items:center;margin-bottom:8px}
.opt-edit input[type=radio]{width:22px;height:22px;accent-color:var(--blue)}
.label-editor{position:relative;display:inline-block;cursor:crosshair;border:2.5px solid var(--line);border-radius:12px;overflow:hidden;max-width:100%}
.label-editor img{display:block;max-height:60vh;width:auto}
.label-editor .pin{cursor:default}
.lbl-row{display:flex;gap:8px;align-items:center;margin-bottom:6px}
.lbl-row .num{font-weight:700;width:30px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--yellow);padding:12px 22px;border-radius:999px;font-weight:700;z-index:50}
.modal-bg{position:fixed;inset:0;background:rgba(14,20,36,.55);display:flex;align-items:flex-start;justify-content:center;padding:40px 16px;overflow:auto;z-index:40}
.modal-bg .card{max-width:720px;width:100%}
.empty{padding:40px;text-align:center;color:var(--muted)}
@media (max-width:640px){
  h1{font-size:24px}
  .login-hero{padding:32px 24px;border-inline-end:0;border-bottom:2.5px solid var(--line)}
  .card{padding:18px}
}

/* ---------- practical sets ---------- */
.ltr{direction:ltr;text-align:left;unicode-bidi:plaintext}
.ps-tabs{position:sticky;top:0;z-index:20;background:var(--paper);padding:12px 0;margin:0 0 18px;border-bottom:2px solid var(--line)}
.ps-tabs .tabs{margin:0;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none}
.ps-tabs .tabs::-webkit-scrollbar{display:none}
.ps-tabs .tab{white-space:nowrap;flex-shrink:0}
.group-title{font-size:20px;margin:28px 0 12px;padding-inline-start:12px;border-inline-start:6px solid var(--yellow)}
.pcard{padding:0;overflow:hidden;margin-bottom:22px}
.pcard-head{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:2px solid var(--line)}
.pcard-num{flex-shrink:0;min-width:34px;height:34px;padding:0 8px;border-radius:999px;background:var(--yellow);color:var(--ink);border:2px solid var(--line);display:inline-flex;align-items:center;justify-content:center;font-weight:800}
.pcard-title{font-weight:800;font-size:18px;line-height:1.4;flex:1;min-width:0}
.pimg{display:block;width:100%;max-height:58vh;object-fit:contain;background:#fff;border-bottom:2px solid var(--line)}
.pimg-wrap{background:#fff}
.ptable{width:100%;border-collapse:collapse}
.ptable td{padding:10px 16px;border-bottom:1.5px solid color-mix(in srgb,var(--line) 25%,transparent);vertical-align:top;font-size:16px}
.ptable td.k{font-weight:800;white-space:nowrap;width:1%;color:var(--blue-dark)}
html[data-theme="dark"] .ptable td.k{color:#8DD0F2}
.ptable tr:last-child td{border-bottom:0}
.pnote{display:inline-block;margin-top:6px;font-size:13px;padding:3px 10px;border-radius:10px;background:var(--note-bg);color:var(--note);font-weight:700}
details.more{border-top:2px solid var(--line)}
details.more summary{cursor:pointer;padding:12px 16px;font-weight:800;list-style:none;display:flex;align-items:center;gap:8px;min-height:44px}
details.more summary::-webkit-details-marker{display:none}
details.more summary::before{content:"+";display:inline-flex;width:22px;height:22px;border-radius:50%;border:2px solid var(--line);align-items:center;justify-content:center;font-size:14px}
details.more[open] summary::before{content:"−"}
.wq{margin-bottom:18px}
.wq .stem{font-weight:800;font-size:17px;margin-bottom:8px}
.wq textarea{min-height:76px}
.wq .pts{font-size:13px;color:var(--muted);font-weight:700}
.gbar{margin-top:10px;padding:10px 14px;border-radius:12px;font-weight:800;border:2px solid}
.gbar.full{background:var(--ok-bg);border-color:var(--ok);color:var(--ok)}
.gbar.half{background:var(--half-bg);border-color:var(--half);color:var(--half)}
.gbar.zero{background:var(--bad-bg);border-color:var(--bad);color:var(--bad)}
html[data-theme="dark"] .gbar.full{color:#6FD7A6}
html[data-theme="dark"] .gbar.zero{color:#F28B87}
.model{margin-top:8px;padding:10px 14px;border-radius:12px;background:var(--soft);border:2px solid var(--line)}
.model b{display:block;margin-bottom:2px}
.total{position:sticky;bottom:12px;z-index:15;display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-top:20px;padding:14px 18px;border-radius:999px;background:var(--ink);color:var(--yellow);font-weight:800;font-size:18px;box-shadow:0 6px 20px rgba(0,0,0,.25)}
.total .btn{min-height:40px}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.toolbar{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.toolbar select{max-width:100%;flex:1;min-width:0}
.theme-btn{background:transparent;border:0;color:#EEF1F7;min-width:44px;min-height:44px;border-radius:999px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}
.theme-btn:hover{background:rgba(255,225,77,.16);color:var(--yellow)}
.counter{display:inline-block;padding:6px 16px;border-radius:999px;background:var(--yellow);color:var(--ink);font-weight:800;border:2px solid var(--line)}
@media (max-width:640px){
  .pcard-title{font-size:16px}
  .ptable td{padding:9px 12px;font-size:15px}
  .ptable td.k{white-space:normal;width:34%}
  .total{border-radius:18px;font-size:16px}
}