/* =====================================================================
   U0C — application stylesheet (dark luxury)
   ===================================================================== */

/* ---------------------------------------------------------- tokens */
:root{
  --void:#05070C; --ink:#070D16; --ink-2:#0A101C;
  --panel:rgba(255,255,255,.032); --panel-2:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.08); --line-2:rgba(255,255,255,.14);
  --text:#EAF2FF; --muted:rgba(154,178,220,.60); --muted-2:rgba(154,178,220,.38);
  --lime:#34D399; --lime-dim:rgba(52,211,153,.12);
  --teal:#22D3EE; --nile:#FACC15;
  --amber:#F5A524; --rose:#F472B6; --blue:#7AA2FF; --ok:#2CE5A7;
  --r-sm:10px; --r-md:16px; --r-lg:22px; --pill:999px;
  --max:1180px;
  --font-display:"Noto Kufi Arabic","Cairo",sans-serif;
  --font-body:"Cairo","Noto Kufi Arabic",system-ui,sans-serif;
  --font-mono:"Space Grotesk",monospace;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--void);color:var(--text);
  font-family:var(--font-body);font-size:16px;line-height:1.75;font-weight:300;
  -webkit-font-smoothing:antialiased;min-height:100vh;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(139,92,246,.15), transparent 60%),
    radial-gradient(700px 500px at 5% 100%, rgba(52,211,153,.10), transparent 60%);
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
p{margin:0}
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.2;margin:0;font-weight:800;letter-spacing:-.02em;text-wrap:balance}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}
::selection{background:var(--lime);color:#04121C}
:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:4px}

.wrap{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:24px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.muted{color:var(--muted)}
.center{text-align:center}
.ltr{direction:ltr;unicode-bidi:isolate}
.hidden{display:none !important}
.row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.stack{display:grid;gap:16px}
.spacer{flex:1}

/* --------------------------------------------------------- buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 24px;border-radius:var(--pill);
  font-weight:500;font-size:.95rem;cursor:pointer;border:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s,box-shadow .25s,transform .2s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-primary{background:var(--lime);color:#04121C}
.btn-primary:hover{background:#6EE7B7;box-shadow:0 14px 40px -18px rgba(52,211,153,.8)}
.btn-ghost{border-color:var(--line-2);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:rgba(52,211,153,.4);background:rgba(52,211,153,.05)}
.btn-danger{border-color:rgba(244,114,182,.35);color:var(--rose);background:rgba(244,114,182,.06)}
.btn-danger:hover{background:rgba(244,114,182,.12)}
.btn-sm{min-height:36px;padding:0 16px;font-size:.85rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.45;pointer-events:none}

/* ----------------------------------------------------------- cards */
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012)),color-mix(in srgb,var(--surface) 55%,transparent);
  border:1px solid var(--line);border-radius:var(--r-md);padding:24px;
}
.card-hover{transition:border-color .3s,transform .3s,box-shadow .3s}
.card-hover:hover{border-color:rgba(52,211,153,.28);transform:translateY(-3px);box-shadow:0 24px 60px -40px rgba(52,211,153,.5)}

/* ---------------------------------------------------------- badges */
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:.72rem;font-weight:600;
  padding:3px 10px;border-radius:var(--pill);background:var(--lime-dim);color:var(--lime);
  border:1px solid rgba(52,211,153,.18);
}
.badge-muted{background:rgba(255,255,255,.05);color:var(--muted);border-color:var(--line)}
.badge-ok{background:rgba(52,211,153,.12);color:var(--ok);border-color:rgba(52,211,153,.25)}
.badge-warn{background:rgba(245,165,36,.12);color:var(--amber);border-color:rgba(245,165,36,.25)}
.badge-danger{background:rgba(244,114,182,.12);color:var(--rose);border-color:rgba(244,114,182,.25)}

/* ----------------------------------------------------------- forms */
.field{display:grid;gap:6px;margin-bottom:16px}
.field label{font-size:.85rem;font-weight:500;color:var(--muted)}
.field input,.field select,.field textarea{
  width:100%;min-height:46px;padding:10px 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.035);border:1px solid var(--line-2);color:var(--text);
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.field textarea{min-height:120px;resize:vertical;line-height:1.7;font-family:var(--font-mono);font-size:.88rem}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:rgba(52,211,153,.55);background:rgba(52,211,153,.04);
  box-shadow:0 0 0 4px rgba(52,211,153,.07);
}
.field select{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--muted) 50%),linear-gradient(135deg,var(--muted) 50%,transparent 50%);background-position:calc(100% - 20px) 20px,calc(100% - 14px) 20px;background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.field .hint{font-size:.78rem;color:var(--muted-2)}
.field .err{font-size:.78rem;color:var(--rose)}
.field input[aria-invalid="true"]{border-color:rgba(244,114,182,.6)}
.check{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.check input{width:18px;height:18px;accent-color:var(--lime)}
.check label{margin:0;font-size:.9rem}

/* ------------------------------------------------------------ flash */
.flash{
  display:flex;gap:10px;align-items:flex-start;
  border:1px solid;border-radius:var(--r-sm);padding:12px 16px;margin:0 0 16px;
  font-size:.9rem;
}
.flash-success{background:rgba(52,211,153,.08);border-color:rgba(52,211,153,.3);color:#A7F3D0}
.flash-error{background:rgba(244,114,182,.08);border-color:rgba(244,114,182,.3);color:#FFD1EA}
.flash-info{background:rgba(122,162,255,.08);border-color:rgba(122,162,255,.3);color:#BFDBFE}

/* ----------------------------------------------------------- tables */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r-md);background:rgba(255,255,255,.015)}
table.table{width:100%;border-collapse:collapse;font-size:.88rem;min-width:620px}
.table th{
  text-align:start;font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  color:var(--muted-2);font-weight:600;padding:12px 16px;border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);white-space:nowrap;
}
.table td{padding:14px 16px;border-bottom:1px solid rgba(255,255,255,.05);vertical-align:middle}
.table tr:last-child td{border-bottom:0}
.table tbody tr:hover td{background:rgba(255,255,255,.02)}
.table .actions{display:flex;gap:8px;justify-content:flex-end}

/* ------------------------------------------------------ public nav */
.site-header{position:sticky;top:0;z-index:60;border-bottom:1px solid transparent;transition:.3s}
.site-header.scrolled{background:color-mix(in srgb,var(--nav-bg,#05070C) 75%,transparent);backdrop-filter:blur(var(--blur,10px));border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:20px}
.brand{display:inline-flex;align-items:center;transition:.3s;color:var(--text)}
.brand svg{width:92px;height:auto;transition:filter .4s}
.brand:hover svg{filter:drop-shadow(0 0 10px rgba(52,211,153,.55)) drop-shadow(0 0 26px rgba(52,211,153,.2))}
.nav-links{display:flex;gap:28px;font-size:.92rem;color:var(--muted)}
.nav-links a:hover{color:var(--text)}
.nav-actions{display:flex;gap:10px;align-items:center}
.lang-switch{font-size:.8rem;color:var(--muted);border:1px solid var(--line);border-radius:var(--pill);padding:6px 12px;transition:.2s}
.lang-switch:hover{color:var(--lime);border-color:rgba(52,211,153,.4)}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:10px;flex-direction:column;align-items:center;justify-content:center;gap:4px}
.burger span{width:15px;height:1.5px;background:var(--text)}
.mobile-menu{display:none;padding:8px 0 20px;border-bottom:1px solid var(--line);background:rgba(5,7,12,.97)}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:13px 24px;color:var(--muted)}
.mobile-menu a:hover{color:var(--text)}

/* ----------------------------------------------------------- hero */
.hero{position:relative;padding:64px 0 80px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.pill{display:inline-flex;align-items:center;gap:9px;border:1px solid rgba(52,211,153,.22);
  background:rgba(52,211,153,.05);color:var(--lime);border-radius:var(--pill);padding:7px 15px;font-size:.78rem}
.pill .dot{width:6px;height:6px;border-radius:50%;background:var(--lime);animation:pulse 2.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(52,211,153,.5)}70%{box-shadow:0 0 0 9px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
.hero h1{font-size:clamp(2.3rem,5.4vw,4rem);line-height:1.1;margin-top:22px}
.hero h1 .accent{background:linear-gradient(100deg,#A7F3D0,var(--lime) 40%,#8A7DFF 72%,#F472B6);
  background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;animation:shimmer 7s linear infinite}
@keyframes shimmer{to{background-position:200% 0}}
.hero .lead{margin-top:22px;max-width:46ch;color:var(--muted);font-size:1.04rem}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);margin-top:44px;border-top:1px solid var(--line)}
.hero-stats > div{padding:20px 6px 0;text-align:center}
.hero-stats b{display:block;font-family:var(--font-mono);font-size:1.9rem;font-weight:500;line-height:1}
.hero-stats span{display:block;margin-top:7px;font-size:.75rem;color:var(--muted-2)}
.orb{width:min(320px,68vw);aspect-ratio:1;border-radius:50%;display:grid;place-items:center;margin-inline:auto;
  border:1px solid rgba(52,211,153,.16);background:radial-gradient(circle,rgba(244,114,182,.18),transparent 62%);
  box-shadow:inset 0 0 70px rgba(244,114,182,.12),0 0 80px -20px rgba(52,211,153,.2);animation:float 9s ease-in-out infinite}
.orb svg{width:52%}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* -------------------------------------------------------- sections */
.section{padding:80px 0}
.section-head{max-width:620px;margin-bottom:44px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-mono);font-size:.7rem;
  letter-spacing:.22em;text-transform:uppercase;color:var(--lime);margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--lime),transparent)}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.6rem)}
.section-head p{margin-top:14px;color:var(--muted);font-size:1rem}

.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:980px){.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}

/* ---------------------------------------------------------- footer */
.site-footer{border-top:1px solid var(--line);background:var(--footer-bg,transparent);padding:56px 0 28px;margin-top:60px;font-size:.88rem}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:40px}
.foot-col h5{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted-2);margin:0 0 14px}
.foot-col a{display:block;padding:5px 0;color:var(--muted)}
.foot-col a:hover{color:var(--lime)}
.foot-legal{margin-top:44px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.76rem;color:var(--muted-2)}
@media(max-width:800px){.foot-grid{grid-template-columns:1fr 1fr}}

/* ---------------------------------------------------------- auth */
.auth-wrap{min-height:100vh;display:grid;place-items:center;padding:40px 20px}
.auth-card{width:100%;max-width:440px;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.015));
  border:1px solid var(--line-2);border-radius:var(--r-lg);padding:36px 32px;
  box-shadow:0 40px 120px -60px rgba(4,18,14,.92)}
.auth-card h1{font-size:1.6rem;margin-bottom:6px}
.auth-card .sub{color:var(--muted);font-size:.9rem;margin-bottom:26px}
.auth-foot{margin-top:20px;font-size:.88rem;color:var(--muted);text-align:center}
.auth-foot a{color:var(--lime)}

/* ----------------------------------------------------------- app */
.app-shell{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.app-side{border-inline-end:1px solid var(--line);padding:24px 18px;position:sticky;top:0;height:100vh;overflow-y:auto;background:rgba(255,255,255,.012)}
.app-main{padding:28px 32px 60px;min-width:0}
.side-brand{display:block;margin-bottom:26px}
.side-brand svg{width:88px}
.side-nav{display:grid;gap:4px}
.side-nav a{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;color:var(--muted);font-size:.9rem;transition:.2s}
.side-nav a:hover{background:rgba(255,255,255,.04);color:var(--text)}
.side-nav a.active{background:rgba(52,211,153,.08);color:var(--lime);border:1px solid rgba(52,211,153,.16)}
.side-foot{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);display:grid;gap:10px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.topbar h1{font-size:1.5rem}
.topbar .sub{color:var(--muted);font-size:.9rem;margin-top:4px}
@media(max-width:900px){
  .app-shell{grid-template-columns:1fr}
  .app-side{position:static;height:auto;border-inline-end:0;border-bottom:1px solid var(--line)}
  .app-main{padding:20px 18px 48px}
}

/* --------------------------------------------------------- stats */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:1100px){.stat-grid{grid-template-columns:repeat(2,1fr)}}
.stat{background:linear-gradient(180deg,rgba(255,255,255,.045),rgba(255,255,255,.012));
  border:1px solid var(--line);border-radius:var(--r-md);padding:18px 20px;position:relative;overflow:hidden}
.stat .label{font-size:.76rem;color:var(--muted-2);margin-bottom:8px}
.stat .value{font-family:var(--font-mono);font-size:1.75rem;font-weight:600;line-height:1.1}
.stat .delta{font-size:.75rem;margin-top:6px;color:var(--muted)}
.stat .spark{position:absolute;inset-inline:0;bottom:0;opacity:.55}

/* --------------------------------------------------------- charts */
.chart-card{background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.01));
  border:1px solid var(--line);border-radius:var(--r-md);padding:20px 22px 12px}
.chart-card h3{font-size:.95rem;font-weight:600;font-family:var(--font-body);margin-bottom:4px}
.chart-card .sub{font-size:.76rem;color:var(--muted-2);margin-bottom:14px}
.chart-grid{display:grid;grid-template-columns:2fr 1fr;gap:16px;margin-bottom:16px}
.chart-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}
@media(max-width:1000px){.chart-grid,.chart-grid-2{grid-template-columns:1fr}}

.donut-legend{display:grid;gap:8px;margin-top:10px;font-size:.82rem}
.donut-legend .li{display:flex;align-items:center;gap:8px;justify-content:space-between}
.donut-legend .k{display:flex;align-items:center;gap:8px;color:var(--muted)}
.donut-legend .sw{width:9px;height:9px;border-radius:3px}
.donut-legend b{font-family:var(--font-mono);font-weight:600}

.bar{background:rgba(255,255,255,.08);border-radius:99px;overflow:hidden;width:100%}
.bar i{display:block;height:100%;border-radius:99px}

/* --------------------------------------------------------- lesson */
.lesson-layout{display:grid;grid-template-columns:1fr 300px;gap:26px;align-items:start}
@media(max-width:1000px){.lesson-layout{grid-template-columns:1fr}}
.video{aspect-ratio:16/9;background:#000;border-radius:var(--r-md);overflow:hidden;border:1px solid var(--line)}
.video iframe{width:100%;height:100%;border:0;display:block}
.video .placeholder{height:100%;display:grid;place-items:center;color:var(--muted);font-size:.9rem}
.lesson-body{margin-top:24px;max-width:70ch}
.lesson-body h1,.lesson-body h2,.lesson-body h3{margin:22px 0 10px}
.lesson-body h1{font-size:1.5rem}.lesson-body h2{font-size:1.25rem}.lesson-body h3{font-size:1.05rem}
.lesson-body p{margin:0 0 14px;color:rgba(234,242,255,.78);line-height:1.9}
.lesson-body ul,.lesson-body ol{margin:0 0 16px;padding-inline-start:22px;color:rgba(234,242,255,.78)}
.lesson-body li{margin-bottom:6px}
.lesson-body code{font-family:var(--font-mono);font-size:.86em;background:rgba(52,211,153,.1);color:var(--lime);padding:2px 6px;border-radius:5px}
.lesson-body pre.code{background:#0A0F1A;border:1px solid var(--line);border-radius:var(--r-sm);padding:16px;overflow:auto;direction:ltr;text-align:left}
.lesson-body pre.code code{background:none;color:#A7F3D0;padding:0}
.lesson-body a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}

.lesson-list{display:grid;gap:6px}
.lesson-item{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;border:1px solid transparent;font-size:.87rem;color:var(--muted)}
.lesson-item:hover{background:rgba(255,255,255,.04);color:var(--text)}
.lesson-item.active{background:rgba(52,211,153,.08);border-color:rgba(52,211,153,.2);color:var(--lime)}
.lesson-item .n{font-family:var(--font-mono);font-size:.72rem;opacity:.6;min-width:20px}
.lesson-item .t{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ----------------------------------------------------- certificate */
.cert-sheet{background:#F7F3E8;color:#0B1220;border-radius:14px;padding:44px;position:relative;overflow:hidden;max-width:820px;margin-inline:auto}
.cert-sheet::after{content:"";position:absolute;inset:14px;border:1px solid rgba(11,18,32,.18);border-radius:8px;pointer-events:none}
.cert-sheet .top{display:flex;justify-content:space-between;align-items:flex-start;position:relative;z-index:1}
.cert-sheet .kind{font-family:var(--font-mono);font-size:.68rem;letter-spacing:.3em;text-transform:uppercase;color:#5B6472}
.cert-sheet h2{font-size:2rem;margin-top:34px;position:relative;z-index:1}
.cert-sheet .to{font-size:.9rem;color:#5B6472;margin-top:22px}
.cert-sheet .who{font-family:var(--font-display);font-size:1.9rem;font-weight:700;margin-top:4px;color:#0B1220}
.cert-sheet .track{font-size:1.15rem;margin-top:18px;color:#FACC15;font-weight:600}
.cert-sheet .cert-foot{display:flex;justify-content:space-between;align-items:flex-end;margin-top:38px;position:relative;z-index:1}
.cert-sheet .cert-meta{display:flex;gap:40px;font-size:.8rem;color:#5B6472}
.cert-sheet .cert-meta b{display:block;color:#0B1220;font-family:var(--font-mono);margin-top:4px;font-size:.98rem;font-weight:600;direction:ltr;unicode-bidi:isolate;text-align:start}
.cert-sheet .seal{width:66px;height:66px;border-radius:50%;border:1px solid rgba(250,204,21,.45);display:grid;place-items:center;color:#FACC15;flex:0 0 auto;background:rgba(250,204,21,.04)}
.cert-sheet .cert-code{margin-top:30px;position:relative;z-index:1;display:inline-flex;flex-direction:column;gap:2px}
.cert-sheet .cert-code span{font-size:.62rem;letter-spacing:.22em;text-transform:uppercase;color:#5B6472}
.cert-sheet .cert-code b{font-family:var(--font-mono);font-size:1rem;letter-spacing:.06em}

@media print{
  body{background:#fff}
  .site-header,.site-footer,.no-print{display:none !important}
  .cert-sheet{box-shadow:none;border-radius:0;max-width:none}
}

/* ------------------------------------------------------- utilities */
.empty{text-align:center;padding:48px 24px;border:1px dashed var(--line);border-radius:var(--r-md);color:var(--muted)}
.empty h3{color:var(--text);margin-bottom:8px}
.divider{height:1px;background:var(--line);margin:24px 0}
.progress-ring{width:52px;height:52px;flex:0 0 auto}
.progress-ring .track{fill:none;stroke:rgba(255,255,255,.08);stroke-width:4}
.progress-ring .bar2{fill:none;stroke:var(--lime);stroke-width:4;stroke-linecap:round;transform:rotate(-90deg);transform-origin:50% 50%;transition:stroke-dashoffset .5s}
.kv{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.04);font-size:.88rem}
.kv span{color:var(--muted)}
.kv b{font-weight:600}

/* ------------------------------------------------------ responsive */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-visual{display:none}
  .nav-links{display:none}
  .burger{display:flex}
  .section{padding:60px 0}
}
@media(max-width:600px){
  .hero{padding:40px 0 56px}
  .hero-stats b{font-size:1.4rem}
  .stat-grid{grid-template-columns:1fr 1fr}
  .app-main{padding:16px 14px 40px}
}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}


/* theme-aware logo colour */
.side-brand, .site-footer .logo, .site-footer svg{color:var(--text)}