:root{
  --paper:#fffef9; --line:#d6e4f5; --margin:#eba3a3; --sheet:#ffffff;
  --ink:#1d3f8f; --text:#23272f; --muted:#5d6675; --gold:#e3a400; --hover:#e6eefb;
  --ok:#1b6e2e; --okbg:#e2f4e5; --ko:#b02e2e; --kobg:#fbe4e2; --info:#e6eefb;
  box-sizing:border-box;
}
@media (prefers-color-scheme: dark){
  :root{
    --paper:#22362e; --line:rgba(255,255,255,.06); --margin:rgba(255,150,150,.35); --sheet:#1c2d26;
    --ink:#f4f1e4; --text:#ecebe3; --muted:#b5bdb5; --gold:#f5cf5a; --hover:#2f4a3d;
    --ok:#83d892; --okbg:rgba(131,216,146,.16); --ko:#ffa198; --kobg:rgba(255,143,133,.16); --info:#2f4a3d;
  }
}
*,*::before,*::after{box-sizing:inherit}
[hidden]{display:none!important}
body{
  margin:0;min-height:100vh;display:flex;flex-direction:column;color:var(--text);
  font-family:"Fredoka","Nunito","Trebuchet MS",system-ui,sans-serif;font-size:18px;line-height:1.45;
  background-color:var(--paper);
  background-image:
    linear-gradient(90deg,transparent 26px,var(--margin) 26px,var(--margin) 28px,transparent 28px),
    repeating-linear-gradient(to bottom,transparent 0 31px,var(--line) 31px 32px);
}
a{color:var(--ink)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
main{width:100%;max-width:760px;margin:0 auto;padding:22px 16px 48px 40px;flex:1}
main.wide{max-width:1100px}
@media (min-width:820px){
  body{background-image:linear-gradient(90deg,transparent 60px,var(--margin) 60px,var(--margin) 62px,transparent 62px),repeating-linear-gradient(to bottom,transparent 0 31px,var(--line) 31px 32px)}
  main{padding-left:24px}
}
h1{font-size:2rem;line-height:1.15;color:var(--ink);margin:8px 0 6px}
h2{font-size:1.3rem;color:var(--ink);margin:26px 0 10px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.count{font-size:.95rem;font-weight:500;color:var(--muted)}
.sub{color:var(--muted);margin:0 0 18px}
.d{font-size:.9rem;color:var(--muted)}
.crumbs{margin:0;font-size:.95rem;color:var(--muted)}
code{font-family:ui-monospace,Consolas,monospace;font-size:.95em;background:var(--hover);padding:1px 6px;border-radius:6px}
code.wrap{word-break:break-all}

/* Top bar */
.topbar{background:var(--sheet);border-bottom:2.5px solid var(--ink);position:relative;z-index:1}
.nav,.subnav{max-width:1100px;margin:0 auto;display:flex;align-items:center;gap:16px;padding:10px 16px;flex-wrap:wrap}
.subnav{padding-top:0;gap:6px}
.subnav a{text-decoration:none;padding:4px 12px;border-radius:20px;font-weight:500}
.subnav a[aria-current]{background:var(--ink);color:var(--sheet)}
.brand{font-weight:700;font-size:1.25rem;text-decoration:none}
.spacer{flex:1}
.nav a{font-weight:500}
.inline{display:inline}
.linkbtn{font:inherit;background:none;border:0;padding:0;color:var(--ink);text-decoration:underline;cursor:pointer}
.linkbtn.danger{color:var(--ko)}
.foot{text-align:center;color:var(--muted);font-size:.85rem;padding:16px}

/* Buttons, cards, forms */
.btn{display:inline-block;font:inherit;font-weight:600;color:var(--sheet);background:var(--ink);border:2.5px solid var(--ink);border-radius:14px;padding:10px 20px;text-decoration:none;cursor:pointer}
.btn:hover{filter:brightness(1.12)}
.btn.small{padding:4px 14px;font-size:.95rem}
.btn.danger{background:var(--ko);border-color:var(--ko)}
.card{background:var(--sheet);border:2.5px solid var(--ink);border-radius:16px;padding:18px 20px;margin:0 0 18px}
.card.narrow,.narrow{max-width:460px}
.card.center{text-align:center;margin-top:30px}
.card.danger{border-color:var(--ko)}
.card h2{margin-top:0}
.big{font-size:3rem;margin:0}
details.card summary{cursor:pointer}
details.card[open] summary{margin-bottom:12px}
.form{display:grid;gap:14px}
.form label{display:grid;gap:4px;font-weight:500}
.form label.check{display:flex;gap:8px;align-items:center;font-weight:400}
input,select,textarea{font:inherit;padding:9px 12px;border:2px solid var(--ink);border-radius:12px;background:var(--sheet);color:var(--text);width:100%}
input[type=checkbox]{width:auto;accent-color:var(--ink)}
input[type=file]{border-style:dashed}
.row{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.cols{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.filters{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0}
.filters input,.filters select{width:auto;flex:1;min-width:160px}

/* Messages */
.flash{border-radius:12px;padding:10px 14px;margin:0 0 14px;border:2px solid}
.flash-ok{background:var(--okbg);border-color:var(--ok)}
.flash-error{background:var(--kobg);border-color:var(--ko)}
.flash-info{background:var(--info);border-color:var(--ink)}
.note{background:var(--sheet);border:2px dashed var(--gold);border-radius:12px;padding:10px 14px}
.empty{background:var(--sheet);border:2.5px dashed var(--ink);border-radius:14px;padding:20px;text-align:center;color:var(--muted)}

/* Levels and exercise lists */
.levels{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.level-card{display:grid;gap:4px;justify-items:start;padding:22px;background:var(--sheet);border:2.5px solid var(--ink);border-radius:18px;text-decoration:none;color:var(--text)}
.level-card:hover{background:var(--hover)}
.level-name{font-size:2rem;font-weight:700;color:var(--ink)}
.search{width:100%;padding:12px 14px;border:2.5px solid var(--ink);border-radius:14px;margin-bottom:8px}
ul.items{list-style:none;margin:0;padding:0;display:grid;gap:10px}
a.item{display:grid;grid-template-columns:auto 1fr auto;gap:12px;align-items:center;padding:14px 16px;background:var(--sheet);border:2.5px solid var(--ink);border-radius:14px;color:var(--text);text-decoration:none}
a.item:hover{background:var(--hover)}
a.item.locked{border-style:dashed;opacity:.82}
.ico{font-size:1.8rem;line-height:1}
.t{display:block;font-weight:600;font-size:1.15rem;color:var(--ink)}
a.item .d{display:block}
.last{display:inline-block;margin-top:4px;font-size:.85rem;font-weight:600;color:var(--ink);background:var(--hover);border-radius:20px;padding:1px 10px}
.last.top::after{content:"";display:inline-block;width:1em;height:1em;margin-left:.3em;vertical-align:-.15em;background:var(--gold);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2l3.09 6.26L22 9.27l-5 4.87 1.18 6.88L12 17.77l-6.18 3.25L7 14.14 2 9.27l6.91-1.01z'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2l3.09 6.26L22 9.27l-5 4.87 1.18 6.88L12 17.77l-6.18 3.25L7 14.14 2 9.27l6.91-1.01z'/%3E%3C/svg%3E") center/contain no-repeat}

/* Badges (also used as toggle buttons in admin) */
.badge{display:inline-block;font:inherit;font-size:.85rem;font-weight:600;border:2px solid;border-radius:20px;padding:1px 10px;white-space:nowrap;background:transparent;cursor:default}
button.badge{cursor:pointer}
.badge.free{color:var(--ok);border-color:var(--ok);background:var(--okbg)}
.badge.lock{color:var(--ko);border-color:var(--ko);background:var(--kobg)}
.badge.pub{color:var(--ink);border-color:var(--ink)}
.badge.hid{color:var(--muted);border-color:var(--muted);border-style:dashed}
.small-link{font-size:.9rem;font-weight:400}
.bulk{font-size:.9rem;margin:-4px 0 8px;color:var(--muted)}

/* Admin */
.stats{display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin:12px 0}
.stat{display:grid;padding:16px;background:var(--sheet);border:2.5px solid var(--ink);border-radius:16px;text-decoration:none;color:var(--text)}
.stat strong{font-size:2rem;color:var(--ink)}
.table-wrap{overflow-x:auto;background:var(--sheet);border:2.5px solid var(--ink);border-radius:14px}
table{border-collapse:collapse;width:100%;font-size:.95rem}
th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{color:var(--ink);background:var(--hover);font-weight:600}
tr:last-child td{border-bottom:0}
tr.missing td{opacity:.6}
.secret code{font-size:1.3rem;letter-spacing:.08em;padding:6px 12px}

/* Printable credentials */
.cred-grid{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
.cred{background:var(--sheet);border:2px dashed var(--ink);border-radius:12px;padding:12px 16px;break-inside:avoid}
.cred p{margin:4px 0}
.cred-site{font-size:.8rem;color:var(--muted)}
.cred-name{font-weight:700;font-size:1.1rem}
@media print{
  body{background:#fff;color:#000}
  .topbar,.foot,.no-print,.flash{display:none!important}
  main{padding:0;max-width:none}
  .cred{border-color:#000;color:#000}
  code{background:none;font-size:1.1em}
}
/* Subscription offer */
.subscribe{background:var(--sheet);border:2.5px solid var(--gold);border-radius:16px;padding:16px 20px;margin:24px auto;max-width:640px}
.subscribe h2{margin:0 0 8px;font-size:1.25rem;color:var(--ink)}
.subscribe ol{margin:8px 0 12px;padding-left:1.4em;line-height:1.55}
.subscribe .btn.wa{background:#157a3e;border-color:#157a3e;color:#fff}
.subscribe .btn.wa:hover{background:#106331;border-color:#106331}
.subscribe p:last-child{margin-bottom:0}
@media print{.subscribe{display:none}}
/* Public landing / SEO content (French + Arabic) */
[lang="ar"]{font-family:"Segoe UI","Noto Sans Arabic","Noto Naskh Arabic",Tahoma,"Geeza Pro",sans-serif}
.hero{margin:6px 0 10px}
.hero h1{font-size:2.1rem}
.h1-sub{font-size:.62em;color:var(--muted);font-weight:600}
.ar-title{font-size:1.25rem;font-weight:700;color:var(--ink);margin:0 0 12px}
.lead{font-size:1.08rem;line-height:1.55;margin:0 0 10px;max-width:760px}
.ar{text-align:right;line-height:1.8}
.lead.ar{color:var(--muted);max-width:760px}
.ar-inline{font-size:.85em;color:var(--muted);font-weight:600}
h2.sec{margin-top:34px}
.level-fr{font-weight:600}
.level-ar{color:var(--muted);font-size:1.05rem}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.chips li{background:var(--sheet);border:2px solid var(--line);border-radius:999px;padding:6px 14px}
.chips li [lang="ar"]{color:var(--muted)}
.steps{list-style:none;margin:0;padding:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.steps li{background:var(--sheet);border:2px solid var(--line);border-radius:16px;padding:14px 16px;line-height:1.5}
.steps li strong{display:block;color:var(--ink);font-size:1.08rem;margin-bottom:4px}
.steps li .ar{display:block;margin-top:6px;color:var(--muted)}
.faq details{background:var(--sheet);border:2px solid var(--line);border-radius:12px;padding:10px 14px;margin:0 0 10px}
.faq summary{cursor:pointer;font-weight:600;color:var(--ink)}
.faq details p{margin:8px 0 2px;line-height:1.6}
.faq.ar summary{text-align:right}
.subscribe .ar{border-top:1px dashed var(--line);margin-top:10px;padding-top:6px}
.subscribe .ar p{margin:6px 0}
.meta-line{color:var(--muted);margin:0 0 10px}
.desc{max-width:560px;margin:0 auto 12px;line-height:1.55}
.incl{list-style:none;padding:0;margin:0 auto 14px;display:inline-grid;gap:4px;text-align:left}
/* SVG icons (app/lib/icons.php) */
.icon{width:1.15em;height:1.15em;vertical-align:-.2em;flex:none;display:inline-block}
.ico .icon{width:1.6rem;height:1.6rem;vertical-align:middle}
.icon-big{width:3.2rem;height:3.2rem}
.icon.lock{color:var(--gold)}
.icon.ok{color:var(--ok)}
.brand-ico{width:1.35em;height:1.35em;color:var(--ink)}
.wave{color:var(--gold)}
.subj-math{color:#1d6fd1}.subj-fr{color:#c43b3b}.subj-en{color:#7a3fc4}.subj-ar{color:#0f8a6b}
.subj-isl{color:#2c8a3d}.subj-sci{color:#d97a00}.subj-geo{color:#0b8aa8}.subj-other{color:var(--muted)}
@media (prefers-color-scheme: dark){
  .subj-math{color:#7fb4ff}.subj-fr{color:#ff9d8e}.subj-en{color:#c9a4ff}.subj-ar{color:#6fe0c0}
  .subj-isl{color:#83d892}.subj-sci{color:#ffc06b}.subj-geo{color:#6fd6ef}
}
.btn .icon,.badge .icon{width:1.05em;height:1.05em}