@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans+Arabic:wght@300;400;500;600&family=Noto+Kufi+Arabic:wght@400;600;700&family=Noto+Naskh+Arabic:wght@400;600;700&display=swap');

:root {
  --al-black:#11110f;
  --al-paper:#fdfdfb;
  --al-line:#d7d7d1;
  --al-muted:#66665f;
  --al-red:#e22b22;
  --al-blue:#1659d8;
  --al-yellow:#f2c500;
  --al-gutter:clamp(18px,3.5vw,56px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body.rtv-arabic-letterform-page{margin:0;background:var(--al-paper);color:var(--al-black);font-family:"Helvetica Neue","IBM Plex Sans Arabic",sans-serif;font-size:16px;line-height:1.45}
.rtv-arabic-letterform-page button,.rtv-arabic-letterform-page input,.rtv-arabic-letterform-page select{font:inherit}
.rtv-arabic-letterform-page a{color:inherit}
.al-skip{position:fixed;left:16px;top:-80px;z-index:1000;background:var(--al-black);color:#fff!important;padding:12px 18px;text-decoration:none}
.al-skip:focus{top:16px}
.al-topbar{height:58px;position:relative;z-index:50;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;border-bottom:1px solid var(--al-black);padding:0 var(--al-gutter);background:rgba(253,253,251,.96);letter-spacing:.08em;font-size:12px;font-weight:700}
.al-brand{text-decoration:none;font-size:16px;letter-spacing:-.02em}
.al-lab-id{justify-self:center}
.al-menu-toggle{justify-self:end;border:0;border-left:1px solid var(--al-black);border-right:1px solid var(--al-black);height:58px;padding:0 24px;background:transparent;cursor:pointer;font-size:11px;font-weight:700;letter-spacing:.09em}
.al-menu-toggle:hover,.al-menu-toggle:focus-visible{background:var(--al-yellow)}
.al-menu{position:fixed;z-index:45;right:0;top:58px;width:min(460px,100%);border-left:1px solid var(--al-black);border-bottom:1px solid var(--al-black);background:var(--al-paper);padding:28px var(--al-gutter)}
.al-menu[hidden]{display:none}
.al-menu a{display:block;border-top:1px solid var(--al-line);padding:15px 0;text-decoration:none;font-size:12px;font-weight:700;letter-spacing:.08em}
.al-menu a:last-child{border-bottom:1px solid var(--al-line)}
.al-menu a:hover{padding-left:12px;color:var(--al-red)}
.al-main{overflow:hidden}
.al-hero{min-height:calc(100vh - 58px);position:relative;display:grid;grid-template-columns:repeat(12,1fr);grid-template-rows:auto 1fr auto auto;padding:36px var(--al-gutter) 30px;border-bottom:1px solid var(--al-black)}
.al-hero-grid{position:absolute;inset:0;background-image:repeating-linear-gradient(90deg,transparent 0,transparent calc(8.333% - 1px),rgba(17,17,15,.065) calc(8.333% - 1px),rgba(17,17,15,.065) 8.333%);pointer-events:none}
.al-kicker{grid-column:1/7;position:relative;font-size:11px;font-weight:700;letter-spacing:.12em}
.al-hero h1{grid-column:1/8;align-self:center;position:relative;margin:5vh 0 0;line-height:.78;letter-spacing:-.075em}
.al-title-en{display:block;font-size:clamp(60px,10.4vw,164px);font-weight:800}
.al-title-ar{display:block;margin-top:3vw;font-family:"Noto Kufi Arabic",sans-serif;font-size:clamp(42px,7vw,110px);font-weight:600;letter-spacing:0;text-align:left;line-height:1}
.al-hero-letter{grid-column:8/13;grid-row:2/3;align-self:center;justify-self:center;position:relative;z-index:2;font-family:"Noto Naskh Arabic",serif;font-size:clamp(220px,33vw,520px);line-height:.8;color:var(--al-black)}
.al-hero-meta{grid-column:1/11;display:grid;grid-template-columns:2fr 4fr;gap:8.333%;position:relative;border-top:1px solid var(--al-black);padding-top:18px}
.al-hero-meta p{margin:0;max-width:680px;font-size:clamp(12px,1.2vw,16px)}
.al-hero-meta p:first-child{font-size:11px;letter-spacing:.08em}
.al-enter{grid-column:1/4;align-self:end;margin-top:32px;position:relative;display:flex;justify-content:space-between;border:1px solid var(--al-black);padding:13px 15px;text-decoration:none;font-size:11px;font-weight:700;letter-spacing:.08em}
.al-enter:hover{background:var(--al-black);color:#fff}
.al-shape{position:absolute;z-index:1;pointer-events:none}
.al-shape-red{width:42px;height:42px;border-radius:50%;background:var(--al-red);right:32%;top:16%}
.al-shape-blue{width:22px;height:clamp(110px,15vw,230px);background:var(--al-blue);right:7%;bottom:13%;transform:rotate(30deg)}
.al-shape-yellow{width:70px;height:18px;background:var(--al-yellow);left:58%;bottom:28%}

.al-section{padding:clamp(56px,9vw,140px) var(--al-gutter);border-bottom:1px solid var(--al-black)}
.al-section-head{display:grid;grid-template-columns:8.333% 50% 1fr;gap:0;margin-bottom:clamp(38px,6vw,86px)}
.al-section-no{font-size:13px;font-weight:800;color:var(--al-red)}
.al-section-head p{margin:0 0 10px;font-size:10px;font-weight:700;letter-spacing:.14em}
.al-section-head h2{margin:0;font-size:clamp(35px,5.2vw,78px);line-height:.9;letter-spacing:-.055em}
.al-section-head .al-section-note{align-self:end;max-width:520px;margin:0;font-size:13px;font-weight:400;letter-spacing:0}

.al-timeline{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--al-black);border-left:1px solid var(--al-black)}
.al-object-card{position:relative;display:grid;grid-template-rows:auto 1fr auto auto auto;min-width:0;min-height:520px;padding:0;border:0;border-right:1px solid var(--al-black);border-bottom:1px solid var(--al-black);background:transparent;color:inherit;text-align:left;cursor:pointer}
.al-object-card::after{content:"";position:absolute;inset:-1px;border:4px solid transparent;pointer-events:none}
.al-object-card:hover::after,.al-object-card:focus-visible::after,.al-object-card.is-active::after{border-color:var(--al-red)}
.al-card-date{padding:13px 14px;border-bottom:1px solid var(--al-black);font-size:11px;font-weight:800;letter-spacing:.08em}
.al-object-card figure{min-height:0;margin:0;overflow:hidden;background:#ecece7}
.al-object-card img{width:100%;height:100%;min-height:335px;object-fit:cover;filter:grayscale(100%);transition:filter .35s,transform .55s}
.al-object-card:hover img,.al-object-card.is-active img{filter:grayscale(0);transform:scale(1.025)}
.al-card-index{padding:12px 14px 4px;font-size:10px;color:var(--al-red);font-weight:700}
.al-object-card strong{padding:0 14px;font-size:15px;letter-spacing:-.01em}
.al-object-card small{padding:4px 14px 15px;color:var(--al-muted);font-size:9px;letter-spacing:.09em}
.al-method-note{display:grid;grid-template-columns:25% 1fr;max-width:900px;margin:28px 0 0 25%;font-size:12px}
.al-method-note span{font-size:10px;font-weight:800;letter-spacing:.1em;color:var(--al-blue)}

.al-microscope{background:#11110f;color:#fff}
.al-microscope .al-section-head{border-color:#fff}
.al-viewer{display:grid;grid-template-columns:minmax(0,2.2fr) minmax(300px,.8fr);border:1px solid #50504b;min-height:720px}
.al-viewer-stage{position:relative;overflow:hidden;background:#242420;display:grid;place-items:center;min-height:600px;cursor:zoom-in}
.al-viewer-stage img{max-width:88%;max-height:620px;transform:scale(1);transform-origin:center;transition:transform .12s ease-out;box-shadow:0 20px 80px rgba(0,0,0,.45);user-select:none;-webkit-user-drag:none}
.al-crosshair i{position:absolute;background:rgba(255,255,255,.34);pointer-events:none}
.al-crosshair i:first-child{left:50%;top:0;bottom:0;width:1px}
.al-crosshair i:last-child{top:50%;left:0;right:0;height:1px}
.al-viewer-status{position:absolute;left:15px;bottom:13px;padding:7px 9px;background:#111;color:#fff;font-size:9px;letter-spacing:.11em}
.al-inspector{border-left:1px solid #50504b;padding:26px;display:flex;flex-direction:column}
.al-inspector-top{display:flex;justify-content:space-between;padding-bottom:13px;border-bottom:1px solid #50504b;font-size:10px;letter-spacing:.1em}
.al-inspector h3{margin:34px 0;font-size:clamp(28px,3vw,46px);line-height:1.02;letter-spacing:-.04em}
.al-inspector dl{margin:0}
.al-inspector dl div{display:grid;grid-template-columns:38% 1fr;padding:10px 0;border-top:1px solid #50504b;font-size:11px}
.al-inspector dt{color:#a4a49d;font-size:9px;letter-spacing:.1em}
.al-inspector dd{margin:0}
.al-rights-dot{display:inline-block;width:7px;height:7px;border-radius:50%;margin-right:7px;background:#47b267}
.al-inspector>a{margin-top:25px;padding:13px;border:1px solid #fff;text-align:center;text-decoration:none;font-size:10px;font-weight:700;letter-spacing:.08em}
.al-inspector>a:hover{background:#fff;color:#111}
.al-zoom-control{display:grid;grid-template-columns:1fr auto;gap:15px;margin-top:auto;padding-top:40px;font-size:9px;letter-spacing:.11em}
.al-zoom-control input{grid-column:1/3;width:100%;accent-color:var(--al-yellow)}
.al-reset{margin-top:15px;border:0;border-bottom:1px solid #fff;padding:10px;background:transparent;color:#fff;font-size:9px;letter-spacing:.1em;cursor:pointer}

.al-anatomy-grid{display:grid;grid-template-columns:2fr 1fr;border:1px solid var(--al-black)}
.al-anatomy-canvas{position:relative;min-height:650px;display:grid;place-items:center;overflow:hidden;background-image:linear-gradient(rgba(17,17,15,.075) 1px,transparent 1px),linear-gradient(90deg,rgba(17,17,15,.075) 1px,transparent 1px);background-size:44px 44px}
.al-anatomy-letter{font-family:"Noto Naskh Arabic",serif;font-size:clamp(290px,37vw,580px);line-height:.8}
.al-guide{position:absolute;left:0;right:0;height:1px;background:var(--al-red)}
.al-guide b{position:absolute;right:10px;bottom:6px;font-size:8px;letter-spacing:.12em;color:var(--al-red)}
.al-guide-top{top:25%;background:var(--al-blue)}
.al-guide-top b{color:var(--al-blue)}
.al-guide-base{top:67%}
.al-guide-space{left:37%;right:auto;top:43%;width:18%;height:18%;border:2px solid var(--al-yellow);border-radius:50%;background:transparent}
.al-guide-space b{width:160px;left:100%;right:auto;bottom:auto;top:50%;color:#8e7600;transform:translate(8px,-50%)}
.al-anatomy-label{position:absolute;left:14px;bottom:12px;font-size:8px;letter-spacing:.1em}
.al-form-grid{display:grid;grid-template-columns:1fr 1fr;border-left:1px solid var(--al-black)}
.al-form-grid article{display:grid;grid-template-rows:auto 1fr auto;min-height:325px;padding:18px;border-right:1px solid var(--al-black);border-bottom:1px solid var(--al-black)}
.al-form-grid article:nth-child(3),.al-form-grid article:nth-child(4){border-bottom:0}
.al-form-grid span,.al-form-grid code{font-size:9px;letter-spacing:.1em}
.al-form-grid b{align-self:center;text-align:center;font-family:"Noto Naskh Arabic",serif;font-size:94px;font-weight:500}
.al-form-grid code{font-family:inherit;color:var(--al-muted)}

.al-type-lab{background:#eeeae0}
.al-type-shell{display:grid;grid-template-columns:2fr 1fr;border:1px solid var(--al-black);min-height:540px}
.al-type-output{display:grid;align-content:center;min-width:0;padding:7vw 5vw;border-right:1px solid var(--al-black);background:var(--al-paper);font-family:"Noto Naskh Arabic",serif;font-size:92px;line-height:1.25;text-align:right;overflow-wrap:anywhere;outline:none}
.al-type-output:focus{box-shadow:inset 0 0 0 4px var(--al-blue)}
.al-controls{display:flex;flex-direction:column;padding:28px}
.al-controls label{display:grid;grid-template-columns:1fr auto;gap:10px;padding:20px 0;border-top:1px solid var(--al-black);font-size:9px;font-weight:700;letter-spacing:.1em}
.al-controls select{grid-column:1/3;width:100%;border:0;border-bottom:1px solid var(--al-black);padding:12px 0;background:transparent;font-size:12px;font-weight:700}
.al-controls input{grid-column:1/3;width:100%;accent-color:var(--al-red)}
.al-control-row{display:grid;grid-template-columns:1fr 1fr;margin-top:auto;border-top:1px solid var(--al-black);border-left:1px solid var(--al-black)}
.al-control-row button,.al-feature-toggle{border:0;border-right:1px solid var(--al-black);border-bottom:1px solid var(--al-black);padding:12px 7px;background:transparent;font-size:9px;letter-spacing:.07em;cursor:pointer}
.al-control-row button:hover{background:var(--al-yellow)}
.al-feature-toggle{margin-top:15px;border:1px solid var(--al-black)}
.al-feature-toggle.is-active{background:var(--al-black);color:#fff}
.al-code-readout{display:grid;grid-template-columns:25% 1fr;border:1px solid var(--al-black);border-top:0;padding:18px;font-size:10px;letter-spacing:.06em}
.al-code-readout span{font-weight:800}
.al-code-readout output{font-family:ui-monospace,monospace;overflow-wrap:anywhere}

.al-ledger-wrap{overflow-x:auto;border:1px solid var(--al-black)}
.al-ledger{width:100%;min-width:840px;border-collapse:collapse;font-size:11px}
.al-ledger th,.al-ledger td{padding:16px 13px;border-right:1px solid var(--al-line);border-bottom:1px solid var(--al-line);text-align:left}
.al-ledger th{background:var(--al-black);color:#fff;font-size:9px;letter-spacing:.1em}
.al-ledger tr:last-child td{border-bottom:0}
.al-ledger a{font-weight:800;text-decoration:none}
.al-ledger a:hover{color:var(--al-red)}
.al-integrity-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:42px;border-top:1px solid var(--al-black);border-left:1px solid var(--al-black)}
.al-integrity-grid article{min-height:230px;padding:20px;border-right:1px solid var(--al-black);border-bottom:1px solid var(--al-black)}
.al-integrity-grid span{color:var(--al-blue);font-size:11px;font-weight:800}
.al-integrity-grid h3{margin:55px 0 12px;font-size:14px}
.al-integrity-grid p{margin:0;font-size:12px;color:var(--al-muted)}

.al-footer{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:end;min-height:260px;padding:60px var(--al-gutter) 30px;background:var(--al-yellow);border-top:1px solid var(--al-black)}
.al-footer div{display:flex;flex-direction:column;gap:7px}
.al-footer strong{font-size:26px;letter-spacing:-.04em}
.al-footer span,.al-footer p,.al-footer a{font-size:9px;font-weight:700;letter-spacing:.1em}
.al-footer p{margin:0;text-align:center}
.al-footer a{text-align:right;text-decoration:none}

@media (max-width:1000px){
  .al-hero{grid-template-rows:auto auto auto auto}
  .al-kicker{grid-column:1/9}
  .al-hero h1{grid-column:1/9}
  .al-hero-letter{grid-column:8/13}
  .al-hero-meta{grid-column:1/13}
  .al-timeline{grid-template-columns:1fr 1fr}
  .al-section-head{grid-template-columns:10% 50% 1fr}
  .al-viewer{grid-template-columns:1fr}
  .al-inspector{border-left:0;border-top:1px solid #50504b}
  .al-zoom-control{margin-top:30px}
  .al-anatomy-grid,.al-type-shell{grid-template-columns:1fr}
  .al-form-grid,.al-type-output{border-left:0;border-right:0;border-top:1px solid var(--al-black)}
  .al-integrity-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:650px){
  .al-topbar{grid-template-columns:1fr auto;padding-left:18px;padding-right:0}
  .al-lab-id{display:none}
  .al-menu-toggle{padding:0 18px}
  .al-hero{min-height:790px;padding:25px 18px}
  .al-kicker{grid-column:1/13}
  .al-hero h1{grid-column:1/13;align-self:start;margin-top:60px}
  .al-title-en{font-size:clamp(56px,19vw,92px)}
  .al-title-ar{font-size:50px}
  .al-hero-letter{grid-column:5/13;grid-row:3;justify-self:end;font-size:230px;margin-top:-35px}
  .al-hero-meta{grid-column:1/13;grid-template-columns:1fr;gap:16px}
  .al-enter{grid-column:1/9}
  .al-shape-blue{right:10%;bottom:8%}
  .al-section{padding:64px 18px}
  .al-section-head{grid-template-columns:34px 1fr}
  .al-section-head .al-section-note{grid-column:2;margin-top:22px}
  .al-section-head h2{font-size:42px}
  .al-timeline{grid-template-columns:1fr}
  .al-object-card{min-height:480px}
  .al-object-card img{min-height:340px}
  .al-method-note{grid-template-columns:1fr;gap:8px;margin-left:0}
  .al-viewer{min-height:0}
  .al-viewer-stage{min-height:430px}
  .al-viewer-stage img{max-width:94%;max-height:390px}
  .al-inspector{padding:20px}
  .al-anatomy-canvas{min-height:440px}
  .al-anatomy-letter{font-size:280px}
  .al-form-grid{grid-template-columns:1fr 1fr}
  .al-form-grid article{min-height:220px}
  .al-form-grid b{font-size:72px}
  .al-type-shell{min-height:0}
  .al-type-output{min-height:340px;padding:40px 22px;font-size:68px}
  .al-controls{padding:20px}
  .al-code-readout{grid-template-columns:1fr;gap:12px}
  .al-integrity-grid{grid-template-columns:1fr}
  .al-integrity-grid article{min-height:180px}
  .al-footer{grid-template-columns:1fr;gap:36px;align-items:start}
  .al-footer p,.al-footer a{text-align:left}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important}
}