/* ============================================================
   VWAPEDIA — design system (terminal / fintech, bilingual EN+AR)
   ============================================================ */
:root{
  --bg:#0a0c10; --bg-2:#0f1217; --surface:#141821; --surface-2:#1b2029; --surface-3:#222936;
  --line:#262d3a; --line-soft:#1d232e;
  --ink:#eef1f6; --ink-2:#c2c8d2; --muted:#8b93a1; --faint:#5b636f;
  --accent:#e8b54b; --accent-2:#b78a2c; --accent-ink:#1a1206;
  --aqua:#4fd6d0; --green:#5ad19a; --red:#ff6b6b; --amber:#f0a94a; --violet:#7c6af7;
  --up:#34d399; --down:#f87171;
  --accent-dim:rgba(232,181,75,.12); --green-dim:rgba(90,209,154,.14); --red-dim:rgba(255,107,107,.13);
  --maxw:1240px; --radius:16px; --radius-s:10px; --radius-xs:7px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 24px 60px -28px rgba(0,0,0,.75);
  --glow:0 0 0 1px var(--accent-dim), 0 18px 50px -24px rgba(232,181,75,.25);
  --nav-w:230px; --header-h:60px;
  --font:"Hanken Grotesk",system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,monospace;
  --display:"Fraunces",Georgia,serif;
}
/* themes — accent swap */
[data-theme="matrix"]{--accent:#5ad19a;--accent-2:#2f9d72;--accent-ink:#04130c;--accent-dim:rgba(90,209,154,.13);--glow:0 0 0 1px rgba(90,209,154,.14),0 18px 50px -24px rgba(90,209,154,.28)}
[data-theme="ice"]{--accent:#4fd6d0;--accent-2:#2a9d99;--accent-ink:#03171a;--accent-dim:rgba(79,214,208,.13);--glow:0 0 0 1px rgba(79,214,208,.14),0 18px 50px -24px rgba(79,214,208,.28)}
[data-theme="violet"]{--accent:#9b8cff;--accent-2:#6b5ae0;--accent-ink:#0c0820;--accent-dim:rgba(155,140,255,.14);--glow:0 0 0 1px rgba(155,140,255,.15),0 18px 50px -24px rgba(155,140,255,.30)}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16.5px;line-height:1.6;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(1100px 620px at 84% -10%,var(--accent-dim),transparent 58%),
    radial-gradient(900px 600px at -8% 8%,rgba(79,214,208,.06),transparent 60%),
    linear-gradient(180deg,#0b0e13,#0a0c10)}
body::after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(var(--line-soft) 1px,transparent 1px),linear-gradient(90deg,var(--line-soft) 1px,transparent 1px);
  background-size:54px 54px;mask:radial-gradient(900px 600px at 70% 0,#000,transparent 75%)}

/* Arabic typography + RTL */
[data-lang="ar"] body,[data-lang="ar"] button,[data-lang="ar"] input,[data-lang="ar"] select{
  font-family:"IBM Plex Sans Arabic",var(--font)}
[data-lang="ar"] h1,[data-lang="ar"] h2,[data-lang="ar"] h3{font-family:"Amiri",var(--display);line-height:1.35}
[data-lang="en"] .ar{display:none!important}
[data-lang="ar"] .en{display:none!important}

h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.12;margin:0 0 .5rem;letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5vw,3.4rem)} h2{font-size:clamp(1.5rem,3vw,2.1rem)} h3{font-size:1.18rem}
a{color:var(--accent);text-decoration:none} a:hover{text-decoration:underline}
.mono{font-family:var(--mono)} .muted{color:var(--muted)} .em{color:var(--accent);font-style:normal}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,3vw,2rem)}
.eyebrow{font:600 .76rem/1 var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--accent)}
.lead{font-size:1.12rem;color:var(--ink-2);max-width:64ch}

/* ---------- App shell ---------- */
.app{display:grid;grid-template-columns:var(--nav-w) 1fr;min-height:100vh}
.side{position:sticky;top:0;align-self:start;height:100vh;border-inline-end:1px solid var(--line);
  background:linear-gradient(180deg,var(--bg-2),var(--bg));display:flex;flex-direction:column;z-index:30}
.side .logo{display:flex;align-items:center;gap:.6rem;padding:1.05rem 1.1rem;border-bottom:1px solid var(--line)}
.side .logo b{font:800 1.18rem/1 var(--display);letter-spacing:.01em}
.side .logo svg{width:30px;height:30px;flex:0 0 auto}
.side nav{padding:.7rem .6rem;display:flex;flex-direction:column;gap:.15rem;overflow-y:auto;flex:1}
.navlink{display:flex;align-items:center;gap:.7rem;padding:.6rem .75rem;border-radius:var(--radius-xs);
  color:var(--ink-2);font-weight:500;font-size:.96rem;cursor:pointer;border:1px solid transparent;transition:.15s}
.navlink .ic{width:1.3em;text-align:center;color:var(--faint);font-size:1.05em}
.navlink:hover{background:var(--surface);color:var(--ink);text-decoration:none}
.navlink.active{background:var(--accent-dim);color:var(--ink);border-color:rgba(232,181,75,.25)}
.navlink.active .ic{color:var(--accent)}
.side .foot{padding:.7rem .85rem;border-top:1px solid var(--line);display:flex;gap:.4rem;flex-wrap:wrap;align-items:center}

.main{min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;height:var(--header-h);display:flex;align-items:center;gap:.6rem;
  padding-inline:clamp(1rem,3vw,1.6rem);border-bottom:1px solid var(--line);
  background:rgba(10,12,16,.72);backdrop-filter:blur(12px);z-index:25}
.topbar .crumb{font:500 .9rem/1 var(--mono);color:var(--muted);letter-spacing:.02em}
.topbar .spacer{flex:1}
.iconbtn{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:var(--radius-xs);
  background:var(--surface);border:1px solid var(--line);color:var(--ink-2);cursor:pointer;font-size:.95rem;transition:.15s}
.iconbtn:hover{border-color:var(--accent);color:var(--ink)}
.menubtn{display:none}
.view{padding:clamp(1.2rem,3vw,2.4rem) 0 5rem;flex:1}

/* ---------- Components ---------- */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.7rem 1.15rem;border-radius:var(--radius-s);
  font:600 .96rem/1 var(--font);border:1px solid var(--line);background:var(--surface);color:var(--ink);
  cursor:pointer;transition:.15s;text-decoration:none}
[data-lang="ar"] .btn{font-family:"IBM Plex Sans Arabic",var(--font)}
.btn:hover{border-color:var(--accent);text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:linear-gradient(180deg,var(--accent),var(--accent-2));color:var(--accent-ink);border-color:transparent;box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.06)}
.btn-ghost{background:transparent}
.btn-sm{padding:.45rem .8rem;font-size:.85rem}
.btn-row{display:flex;gap:.7rem;flex-wrap:wrap}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;box-shadow:var(--shadow)}
.card-soft{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:1.1rem}
.grid{display:grid;gap:1.1rem}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.grid-4{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}
.pill{display:inline-flex;align-items:center;gap:.35rem;padding:.28rem .7rem;border-radius:99px;
  background:var(--surface-2);border:1px solid var(--line);font:600 .76rem/1 var(--mono);color:var(--ink-2)}
.pill.accent{background:var(--accent-dim);border-color:rgba(232,181,75,.3);color:var(--accent)}
.tag{display:inline-block;padding:.2rem .55rem;border-radius:99px;background:var(--surface-2);border:1px solid var(--line);
  font-size:.72rem;color:var(--muted);margin:.15rem .15rem 0}
.kpi{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-s);padding:.9rem 1rem;text-align:center}
.kpi b{display:block;font:700 1.7rem/1 var(--mono);color:var(--accent)}
.kpi span{font-size:.74rem;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:1rem;margin-bottom:1.3rem;flex-wrap:wrap}
.divider{height:1px;background:var(--line);margin:1.6rem 0}
.note{font-size:.85rem;color:var(--muted)}
.badge-soon{font:600 .68rem/1 var(--mono);letter-spacing:.08em;color:var(--amber);border:1px solid rgba(240,169,74,.35);
  background:rgba(240,169,74,.1);border-radius:99px;padding:.2rem .5rem;text-transform:uppercase}

/* hero */
.hero{padding:clamp(1.5rem,4vw,3rem) 0 1rem}
.hero h1{max-width:18ch}
.hero .lead{margin-top:.4rem}
.hero .btn-row{margin-top:1.6rem}
.mentor-strip{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:2rem}

/* table */
.tbl{width:100%;border-collapse:collapse;font-size:.92rem}
.tbl th,.tbl td{text-align:start;padding:.6rem .7rem;border-bottom:1px solid var(--line-soft)}
.tbl th{font:600 .72rem/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.tbl tr:hover td{background:var(--surface)}
.bar{height:6px;background:var(--surface-2);border-radius:99px;overflow:hidden}
.bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--aqua),var(--accent))}

/* ---------- Trainer / drill ---------- */
.drill-chart{position:relative;border:1px solid var(--line);border-radius:var(--radius-s);overflow:hidden;background:#000;cursor:zoom-in}
.drill-chart img{display:block;width:100%;height:auto}
.zoomhint{position:absolute;inset-block-end:.5rem;inset-inline-end:.5rem;background:rgba(8,9,12,.82);border:1px solid var(--line);
  border-radius:99px;padding:.22rem .65rem;font:.7rem/1 var(--mono);color:var(--ink-2);pointer-events:none}
.prog{display:flex;justify-content:space-between;font:500 .82rem/1 var(--mono);color:var(--muted);margin:.9rem 0 .4rem}
.choices{display:grid;gap:.55rem;margin-top:.4rem}
.choice{display:flex;align-items:center;gap:.7rem;text-align:start;background:var(--surface-2);border:1px solid var(--line);
  border-radius:var(--radius-s);padding:.78rem 1rem;font:inherit;font-size:1rem;color:var(--ink);cursor:pointer;transition:.13s}
.choice:hover{border-color:var(--accent);background:var(--surface-3)}
.choice .k{font:600 .8rem/1 var(--mono);color:var(--faint);border:1px solid var(--line);border-radius:6px;padding:.25rem .45rem;min-width:1.8em;text-align:center}
.choice.correct{border-color:var(--green);background:var(--green-dim)} .choice.wrong{border-color:var(--red);background:var(--red-dim)}
.choice:disabled{cursor:default}
.fb{margin-top:1rem;padding:.85rem 1rem;border-radius:var(--radius-s);border:1px solid var(--line);display:none}
.fb.show{display:block} .fb.ok{border-color:var(--green);background:var(--green-dim)} .fb.no{border-color:var(--red);background:var(--red-dim)}
.fb .full{display:block;font:.82rem/1.4 var(--mono);color:var(--ink-2);margin-top:.3rem}
.arrowtag{display:inline-grid;place-items:center;width:1.7em;height:1.7em;border-radius:50%;background:var(--accent);color:var(--accent-ink);
  font:700 .85em/1 var(--mono);vertical-align:-.35em;margin-inline:.15em}
.grade{font:800 4rem/1 var(--display);text-align:center;margin:.2rem 0}
.grade.S{color:var(--accent)} .grade.A{color:var(--green)} .grade.B{color:var(--aqua)} .grade.C{color:var(--amber)} .grade.D{color:var(--red)}

/* flashcard */
.flash{perspective:1400px}
.flash-inner{position:relative;min-height:230px;transition:transform .5s var(--ease);transform-style:preserve-3d;cursor:pointer}
.flash.flipped .flash-inner{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;
  padding:1.6rem;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}
.flash-back{transform:rotateY(180deg);background:var(--surface-2)}
.flash .qx{font-size:1.18rem;font-weight:600;line-height:1.45}
.flash .ax{color:var(--ink-2);line-height:1.6}

/* select / field */
.field label{display:block;font:600 .74rem/1 var(--mono);text-transform:uppercase;letter-spacing:.05em;color:var(--muted);margin-bottom:.35rem}
.field select,.field input{width:100%;background:var(--surface-2);color:var(--ink);border:1px solid var(--line);border-radius:var(--radius-xs);padding:.6rem .7rem;font:inherit;font-size:.94rem}
.row{display:flex;flex-wrap:wrap;gap:.9rem;align-items:flex-end}
.row .field{flex:1;min-width:140px}

/* lightbox */
.lb{position:fixed;inset:0;z-index:80;background:rgba(6,7,10,.95);display:none;overflow:auto}
.lb.open{display:block} .lb img{display:block;max-width:none;margin:auto;cursor:zoom-out}
.lb .x{position:fixed;top:.8rem;inset-inline-end:.9rem;width:42px;height:42px;border-radius:99px;background:var(--surface);
  border:1px solid var(--line);color:var(--ink);font-size:1.2rem;cursor:pointer;z-index:81}

/* admin */
.admin-gate{max-width:360px;margin:3rem auto;text-align:center}
.toggle-row{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem .9rem;border:1px solid var(--line);border-radius:var(--radius-s);background:var(--surface);margin-bottom:.5rem}
.switch{position:relative;width:46px;height:26px;flex:0 0 auto}
.switch input{opacity:0;width:0;height:0}
.switch .sl{position:absolute;inset:0;background:var(--surface-3);border:1px solid var(--line);border-radius:99px;transition:.2s;cursor:pointer}
.switch .sl::before{content:"";position:absolute;height:18px;width:18px;inset-block:3px;inset-inline-start:3px;background:var(--muted);border-radius:50%;transition:.2s}
.switch input:checked + .sl{background:var(--accent-dim);border-color:var(--accent)}
.switch input:checked + .sl::before{background:var(--accent);inset-inline-start:23px}

/* toast */
.toast{position:fixed;inset-block-end:1.2rem;inset-inline:0;margin-inline:auto;width:max-content;max-width:90vw;
  background:var(--surface-3);border:1px solid var(--accent);color:var(--ink);padding:.7rem 1.1rem;border-radius:99px;
  box-shadow:var(--shadow);z-index:90;opacity:0;transform:translateY(10px);transition:.25s;pointer-events:none}
.toast.show{opacity:1;transform:none}

/* reveal */
.rv{opacity:0;transform:translateY(14px);transition:.6s var(--ease)} .rv.in{opacity:1;transform:none}
.hidden{display:none!important}

/* ---------- responsive ---------- */
@media(max-width:860px){
  .app{grid-template-columns:1fr}
  .side{position:fixed;inset-inline-start:0;top:0;width:min(82vw,300px);transform:translateX(-105%);transition:transform .25s var(--ease);box-shadow:var(--shadow)}
  [data-lang="ar"] .side{inset-inline-start:auto;inset-inline-end:0;transform:translateX(105%)}
  .side.open{transform:none}
  .menubtn{display:inline-grid}
  .scrim{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:29;display:none}
  .scrim.open{display:block}
}
@media(max-width:560px){.grade{font-size:3.1rem}.card{padding:1rem}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}