/* SmartStudyDZ — Arabic theme v2: white · blue · orange (from the logo) */
:root{
  --navy:#183858; --blue:#1F5F96; --blue-2:#2A7BC0; --sky:#EAF3FB; --sky-2:#F5F9FD;
  --orange:#F7A233; --orange-2:#FFB54D; --orange-ink:#3A2300; --coral:#E8603C;
  --text:#14304D; --muted:#5B7089; --line:#E1EAF3; --white:#fff; --ok:#1FA971;
  --r:16px; --r-lg:22px; --shadow:0 18px 40px -18px rgba(24,56,88,.28); --shadow-s:0 6px 18px -8px rgba(24,56,88,.18);
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body.sd{font-family:'Cairo',system-ui,sans-serif;background:var(--white);color:var(--text);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.sd a{color:inherit;text-decoration:none}
.sd img{max-width:100%;display:block}
.sd .wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.sd bdi{unicode-bidi:isolate;direction:ltr}
.sd .brand-word{direction:ltr;unicode-bidi:isolate;font-weight:800;white-space:nowrap;color:var(--navy)}
.sd .brand-word b{color:var(--orange);font-weight:800}

/* buttons */
.sd .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-family:inherit;font-weight:700;font-size:15px;border-radius:12px;padding:13px 22px;border:1.5px solid transparent;cursor:pointer;transition:transform .18s ease,background .2s,border-color .2s,box-shadow .2s,color .2s;white-space:nowrap}
.sd .btn:hover{transform:translateY(-2px)}
.sd .btn-primary{background:var(--orange);color:var(--orange-ink);box-shadow:0 12px 26px -12px rgba(247,162,51,.9)}
.sd .btn-primary:hover{background:var(--orange-2)}
.sd .btn-blue{background:var(--blue);color:#fff;box-shadow:0 12px 26px -12px rgba(31,95,150,.8)}
.sd .btn-blue:hover{background:var(--blue-2)}
.sd .btn-ghost{background:#fff;color:var(--navy);border-color:var(--line)}
.sd .btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.sd .btn-wa{background:#fff;color:var(--navy);border-color:var(--line)}
.sd .btn-wa i{color:#25D366;font-size:20px}
.sd .btn-wa:hover{border-color:#25D366}
.sd .btn-lg{padding:15px 26px;font-size:16.5px;border-radius:14px}
.sd .btn-app img{width:26px;height:26px;border-radius:7px;background:#fff;padding:2px}

/* header */
.sd .hdr{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.sd .hdr.scrolled{border-bottom-color:var(--line);box-shadow:0 6px 20px -14px rgba(24,56,88,.35)}
.sd .hdr .wrap{display:flex;align-items:center;justify-content:space-between;height:74px;gap:16px}
.sd .logo{display:flex;align-items:center;gap:10px;font-size:21px}
.sd .logo img{width:46px;height:46px;object-fit:contain}
.sd .nav{display:flex;align-items:center;gap:4px}
.sd .nav a{padding:8px 14px;border-radius:10px;color:var(--muted);font-weight:700;font-size:15px;transition:color .2s,background .2s}
.sd .nav a:hover,.sd .nav a.on{color:var(--blue);background:var(--sky)}
.sd .hdr-cta{display:flex;align-items:center;gap:10px}
.sd .hdr-cta .btn{padding:10px 16px;font-size:14px}
.sd .burger{display:none;background:#fff;border:1px solid var(--line);color:var(--navy);width:42px;height:42px;border-radius:10px;font-size:18px;cursor:pointer}
.sd .l-short{display:none}

/* hero */
.sd .hero{position:relative;padding:56px 0 72px;overflow:hidden;background:linear-gradient(180deg,#EDF5FC 0%,#F7FBFE 60%,#fff 100%)}
.sd .hero::before{content:"";position:absolute;width:560px;height:560px;left:-160px;top:-120px;background:radial-gradient(circle,rgba(42,123,192,.16),transparent 65%);pointer-events:none}
.sd .hero::after{content:"";position:absolute;width:420px;height:420px;right:-140px;bottom:-160px;background:radial-gradient(circle,rgba(247,162,51,.16),transparent 65%);pointer-events:none}
.sd .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.sd .eyebrow{display:inline-flex;align-items:center;gap:8px;background:#fff;color:var(--blue);border:1px solid var(--line);box-shadow:var(--shadow-s);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:800;margin-bottom:20px}
.sd .eyebrow i{color:var(--orange)}
.sd .hero h1{font-size:clamp(34px,5vw,58px);line-height:1.25;font-weight:800;margin-bottom:18px;color:var(--navy)}
.sd .hero h1 em{font-style:normal;color:var(--orange)}
.sd .hero h1 span{color:var(--blue)}
.sd .hero p.lead{font-size:clamp(17px,1.7vw,20px);color:var(--muted);max-width:540px;margin-bottom:30px;font-weight:600}
.sd .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px}
.sd .trust{display:flex;flex-wrap:wrap;gap:20px;color:var(--muted);font-size:14px;font-weight:600}
.sd .trust span{display:inline-flex;align-items:center;gap:8px}
.sd .trust i{color:var(--blue)}

/* map */
.sd .map-box{position:relative;width:100%;max-width:520px;justify-self:center;aspect-ratio:1/1}
.sd .map-bg{position:absolute;inset:4%;border-radius:50%;background:radial-gradient(circle at 50% 40%,#fff 0%,#E3EFFA 70%,#D6E7F6 100%);box-shadow:0 30px 70px -30px rgba(24,56,88,.45),inset 0 0 0 1px rgba(31,95,150,.08)}
.sd .map-ring{position:absolute;inset:0;border-radius:50%;border:1.5px dashed rgba(31,95,150,.22);animation:sdspin 70s linear infinite}
.sd .map-svg{position:absolute;inset:11%;width:78%;height:78%;overflow:visible}
.sd .dz-land{fill:url(#dzGrad);stroke:#fff;stroke-width:2.2;stroke-linejoin:round;filter:drop-shadow(0 10px 18px rgba(24,56,88,.25))}
.sd .dz-draw{fill:none;stroke:var(--orange);stroke-width:2.2;stroke-dasharray:1600;stroke-dashoffset:1600;animation:sddraw 3.2s ease forwards .2s;opacity:.9}
.sd .dot{cursor:pointer}
.sd .dot .core{fill:var(--orange);stroke:#fff;stroke-width:2}
.sd .dot .pulse{fill:var(--orange);opacity:.45;transform-box:fill-box;transform-origin:center;animation:sdpulse 2.4s ease-out infinite}
.sd .dot .hit{fill:transparent}
.sd .dot:hover .core,.sd .dot.act .core{fill:#fff;stroke:var(--orange);stroke-width:3}
.sd .dot.deco{cursor:default}
.sd .dot.deco .core{fill:#FFD08A}
.sd .map-hint{position:absolute;bottom:3%;left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-s);border-radius:999px;padding:6px 14px;font-size:13px;font-weight:700;color:var(--navy);white-space:nowrap;display:flex;align-items:center;gap:8px}
.sd .map-hint .blink{width:9px;height:9px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(247,162,51,.25);animation:sdblink 1.6s ease-in-out infinite}
.sd .pop{position:absolute;z-index:5;width:260px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 24px 50px -18px rgba(24,56,88,.45);padding:14px 16px 16px;opacity:0;transform:translateY(8px) scale(.97);pointer-events:none;transition:opacity .2s,transform .2s}
.sd .pop.show{opacity:1;transform:none;pointer-events:auto}
.sd .pop .who{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.sd .pop .av{width:38px;height:38px;border-radius:50%;background:var(--sky);color:var(--blue);display:grid;place-items:center;font-weight:800;flex-shrink:0}
.sd .pop b{display:block;font-size:15px;color:var(--navy);line-height:1.3}
.sd .pop .stars{color:var(--orange);font-size:13px;letter-spacing:1px}
.sd .pop p{font-size:14px;color:var(--text);line-height:1.6;max-height:130px;overflow:auto}
.sd .pop .x{position:absolute;top:8px;left:10px;background:none;border:0;color:var(--muted);font-size:16px;cursor:pointer}
@keyframes sdspin{to{transform:rotate(360deg)}}
@keyframes sddraw{to{stroke-dashoffset:0;opacity:0}}
@keyframes sdpulse{0%{transform:scale(1);opacity:.5}100%{transform:scale(3.4);opacity:0}}
@keyframes sdblink{50%{opacity:.35}}
@keyframes sdin{from{opacity:0;transform:scale(.2)}to{opacity:1;transform:none}}
.sd .dot{animation:sdin .5s cubic-bezier(.2,1.4,.4,1) backwards;transform-box:fill-box;transform-origin:center}

/* sections */
.sd section.blk{padding:84px 0}
.sd .soft{background:var(--sky-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sd .sec-head{text-align:center;max-width:700px;margin:0 auto 44px}
.sd .sec-head .tag{display:inline-block;color:var(--blue);background:var(--sky);font-weight:800;font-size:13px;padding:4px 12px;border-radius:999px;margin-bottom:10px}
.sd .sec-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.35;margin-bottom:10px;color:var(--navy)}
.sd .sec-head p{color:var(--muted);font-size:17px;font-weight:600}

/* why boxes */
.sd .why{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sd .wbox{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px 26px;box-shadow:var(--shadow-s);transition:transform .2s,box-shadow .2s,border-color .2s;overflow:hidden}
.sd .wbox:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:#CFE0F0}
.sd .wbox::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:linear-gradient(90deg,var(--orange),var(--blue-2))}
.sd .wbox .n{position:absolute;left:20px;top:16px;font-size:42px;font-weight:800;color:#EEF4FA;line-height:1}
.sd .wbox .ic{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;background:var(--sky);color:var(--blue);font-size:22px;margin-bottom:16px;position:relative}
.sd .wbox h3{font-size:19px;font-weight:800;color:var(--navy);margin-bottom:10px;line-height:1.5}
.sd .wbox p{color:var(--muted);font-size:15px;font-weight:600}
.sd .wbox ul{list-style:none;display:grid;gap:7px;margin-top:4px}
.sd .wbox li{display:flex;gap:9px;align-items:flex-start;font-size:15px;font-weight:600;color:var(--text)}
.sd .wbox li i{color:var(--orange);margin-top:6px;font-size:12px}
.sd .wbox .note{margin-top:12px;display:inline-flex;align-items:center;gap:8px;background:#FFF5E6;color:#9A5A00;border-radius:10px;padding:6px 12px;font-size:13.5px;font-weight:800}
.sd .wbox.hl{background:linear-gradient(160deg,var(--blue) 0%,#2A73B2 100%);border-color:transparent}
.sd .wbox.hl h3,.sd .wbox.hl li{color:#fff}
.sd .wbox.hl .ic{background:rgba(255,255,255,.16);color:#fff}
.sd .wbox.hl .n{color:rgba(255,255,255,.1)}
.sd .wbox.hl li i{color:var(--orange-2)}

/* levels */
.sd .levels{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.sd .lvl{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;transition:transform .2s,box-shadow .2s,border-color .2s;display:flex;flex-direction:column;min-height:220px;box-shadow:var(--shadow-s)}
.sd .lvl:hover{transform:translateY(-5px);border-color:var(--blue-2);box-shadow:var(--shadow)}
.sd .lvl .ic{width:52px;height:52px;border-radius:15px;display:grid;place-items:center;background:var(--sky);color:var(--blue);font-size:21px;margin-bottom:16px}
.sd .lvl h3{font-size:19px;font-weight:800;margin-bottom:6px;color:var(--navy)}
.sd .lvl p{color:var(--muted);font-size:14px;flex:1;font-weight:600}
.sd .lvl .go{margin-top:14px;color:var(--blue);font-weight:800;font-size:14px;display:inline-flex;align-items:center;gap:8px}
.sd .lvl.featured{border-color:var(--orange);box-shadow:0 20px 40px -22px rgba(247,162,51,.7)}
.sd .lvl.featured .ic{background:#FFF1DC;color:#D98410}
.sd .lvl .pill{position:absolute;left:16px;top:16px;background:var(--orange);color:var(--orange-ink);font-size:12px;font-weight:800;padding:3px 10px;border-radius:999px}

/* video */
.sd .video-box{max-width:900px;margin:0 auto;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);background:#0d1b2a;border:6px solid #fff;outline:1px solid var(--line)}
.sd .video-box video{width:100%;display:block;aspect-ratio:16/9}

/* pricing */
.sd .tabs{display:flex;gap:6px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px;width:max-content;max-width:100%;margin:0 auto 34px;overflow-x:auto;box-shadow:var(--shadow-s)}
.sd .tab{background:none;border:0;color:var(--muted);font-family:inherit;font-weight:800;font-size:15px;padding:10px 18px;border-radius:10px;cursor:pointer;white-space:nowrap}
.sd .tab.on{background:var(--blue);color:#fff}
.sd .plans{display:none;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
.sd .plans.on{display:grid}
.sd .plan{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 26px;display:flex;flex-direction:column;box-shadow:var(--shadow-s)}
.sd .plan.best{border:2px solid var(--orange);box-shadow:0 26px 50px -26px rgba(247,162,51,.8)}
.sd .plan .badge{position:absolute;top:-14px;right:50%;transform:translateX(50%);background:var(--orange);color:var(--orange-ink);font-size:13px;font-weight:800;padding:4px 14px;border-radius:999px;white-space:nowrap}
.sd .plan h3{font-size:18px;font-weight:800;color:var(--navy);margin-bottom:2px}
.sd .plan .note{color:var(--muted);font-size:14px;margin-bottom:16px;font-weight:600}
.sd .price{display:flex;align-items:baseline;gap:8px;margin-bottom:20px;flex-wrap:wrap}
.sd .price b{font-size:40px;font-weight:800;line-height:1;color:var(--blue)}
.sd .plan.best .price b{color:#D98410}
.sd .price span{color:var(--muted);font-weight:700}
.sd .price s{color:#98A9BB;font-size:16px;width:100%}
.sd .plan ul{list-style:none;display:grid;gap:10px;margin-bottom:26px;flex:1}
.sd .plan li{display:flex;gap:10px;align-items:flex-start;font-size:15px;font-weight:600}
.sd .plan li i{color:var(--ok);margin-top:6px;font-size:13px}
.sd .plan .btn{width:100%}

/* app */
.sd .app-card{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;background:linear-gradient(135deg,var(--blue) 0%,#2B78B8 100%);border-radius:28px;padding:48px;position:relative;overflow:hidden;color:#fff;box-shadow:0 30px 60px -30px rgba(31,95,150,.7)}
.sd .app-card::after{content:"";position:absolute;left:-90px;bottom:-120px;width:360px;height:360px;border-radius:50%;background:radial-gradient(circle,rgba(247,162,51,.35),transparent 65%)}
.sd .app-card .eyebrow{background:rgba(255,255,255,.14);color:#fff;border-color:rgba(255,255,255,.25);box-shadow:none}
.sd .app-card h2{font-size:clamp(26px,3.2vw,36px);font-weight:800;line-height:1.35;margin-bottom:12px}
.sd .app-card p{color:#DCEBF8;margin-bottom:24px;font-size:17px;font-weight:600}
.sd .app-meta{color:#C3DAEE;font-size:13px;margin-top:12px;font-weight:600}
.sd .steps{list-style:none;display:grid;gap:12px;position:relative;z-index:1}
.sd .steps li{display:flex;gap:14px;align-items:flex-start;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:14px 16px}
.sd .steps .n{width:32px;height:32px;border-radius:10px;background:var(--orange);color:var(--orange-ink);font-weight:800;display:grid;place-items:center;flex-shrink:0}
.sd .steps b{display:block;font-size:15px}
.sd .steps small{color:#DCEBF8;font-size:13px;font-weight:600}

/* reviews */
.sd .reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sd .rev{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow-s)}
.sd .stars{color:var(--orange);font-size:14px;letter-spacing:2px}
.sd .rev p{color:var(--text);font-size:15px;flex:1;font-weight:600}
.sd .rev .who{display:flex;align-items:center;gap:12px}
.sd .rev .av{width:40px;height:40px;border-radius:50%;background:var(--sky);color:var(--blue);display:grid;place-items:center;font-weight:800}
.sd .rev .who b{display:block;font-size:15px;color:var(--navy)}
.sd .rev .who small{color:var(--muted);font-size:12px}
.sd .rev-form{max-width:640px;margin:36px auto 0;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow-s)}
.sd .rev-form h3{font-size:19px;font-weight:800;margin-bottom:16px;text-align:center;color:var(--navy)}
.sd .field{width:100%;background:var(--sky-2);border:1px solid var(--line);border-radius:12px;padding:12px 14px;color:var(--text);font-family:inherit;font-size:15px;margin-bottom:12px}
.sd .field:focus{outline:none;border-color:var(--blue-2);background:#fff}
.sd .rate{display:flex;flex-direction:row-reverse;justify-content:center;gap:6px;margin-bottom:12px}
.sd .rate input{display:none}
.sd .rate label{font-size:28px;color:#D5DFEA;cursor:pointer}
.sd .rate input:checked~label,.sd .rate label:hover,.sd .rate label:hover~label{color:var(--orange)}
.sd .alert{max-width:640px;margin:0 auto 24px;padding:14px 18px;border-radius:12px;display:flex;gap:10px;align-items:center;font-weight:700}
.sd .alert.ok{background:#E7F7EF;color:#12744C}
.sd .alert.err{background:#FDECE7;color:#A63A1C}

/* cta + footer */
.sd .cta{text-align:center}
.sd .cta-box{background:linear-gradient(135deg,#FFF6E8 0%,#EAF3FB 100%);border:1px solid var(--line);border-radius:28px;padding:54px 24px}
.sd .cta h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;margin-bottom:10px;color:var(--navy)}
.sd .cta p{color:var(--muted);margin-bottom:26px;font-size:17px;font-weight:600}
.sd .cta .row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.sd footer.ft{background:var(--navy);color:#fff;padding:52px 0 110px}
.sd .ft .brand-word{color:#fff}
.sd .ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.sd .ft .logo img{background:#fff;border-radius:12px;padding:3px}
.sd .ft h4{font-size:15px;font-weight:800;margin-bottom:14px}
.sd .ft ul{list-style:none;display:grid;gap:8px}
.sd .ft ul a{color:#B9CCE0;font-size:14px;font-weight:600}
.sd .ft ul a:hover{color:var(--orange)}
.sd .ft .about{color:#B9CCE0;font-size:14px;margin-top:12px;max-width:320px;font-weight:600}
.sd .social{display:flex;gap:10px;margin-top:16px}
.sd .social a{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.08);color:#fff}
.sd .social a:hover{background:var(--orange);color:var(--orange-ink)}
.sd .copy{border-top:1px solid rgba(255,255,255,.12);margin-top:32px;padding-top:20px;color:#8FA7C0;font-size:13px;text-align:center}

.sd .dock{display:none}

@media (max-width:1024px){
  .sd .levels{grid-template-columns:repeat(2,1fr)}
  .sd .why{grid-template-columns:repeat(2,1fr)}
  .sd .reviews{grid-template-columns:repeat(2,1fr)}
  .sd .ft-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .sd .nav,.sd .hdr-cta .btn-ghost{display:none}
  .sd .burger{display:grid;place-items:center}
  .sd .nav.open{display:flex;position:absolute;top:74px;right:0;left:0;flex-direction:column;align-items:stretch;background:#fff;border-bottom:1px solid var(--line);padding:12px 20px 18px;box-shadow:var(--shadow)}
  .sd .hero{padding:28px 0 48px}
  .sd .hero-grid{grid-template-columns:1fr;gap:18px;text-align:center}
  .sd .hero p.lead{margin-inline:auto}
  .sd .hero-actions,.sd .trust{justify-content:center}
  .sd .map-box{max-width:400px;order:2}
  .sd .pop{width:230px}
  .sd .plans.on{grid-template-columns:1fr;max-width:420px;margin:0 auto}
  .sd .plan.best{order:-1}
  .sd .app-card{grid-template-columns:1fr;padding:30px 22px;text-align:center}
  .sd section.blk{padding:60px 0}
  .sd .dock{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:60;background:rgba(255,255,255,.97);backdrop-filter:blur(12px);border-top:1px solid var(--line);padding:8px 6px calc(8px + env(safe-area-inset-bottom));box-shadow:0 -8px 24px -16px rgba(24,56,88,.4)}
  .sd .dock a{display:flex;flex-direction:column;align-items:center;gap:3px;color:var(--muted);font-size:12px;font-weight:800;padding:4px 0}
  .sd .dock a i{font-size:18px}
  .sd .dock a.on{color:var(--blue)}
  .sd .dock a.app{color:#D98410}
}
@media (max-width:560px){
  .sd .wrap{padding:0 16px}
  .sd .hdr-cta .l-long{display:none}
  .sd .hdr-cta .l-short{display:inline}
  .sd .logo{font-size:18px}
  .sd .logo img{width:40px;height:40px}
  .sd .levels,.sd .why,.sd .reviews{grid-template-columns:1fr}
  .sd .lvl{min-height:0}
  .sd .ft-grid{grid-template-columns:1fr}
  .sd .hero-actions .btn{width:100%}
  .sd .btn-lg{width:100%}
}
@media (prefers-reduced-motion:reduce){.sd *{animation:none!important;transition:none!important}.sd .dz-draw{display:none}}
.sd .dot:focus{outline:none}.sd .dot:focus-visible .core{stroke:var(--blue);stroke-width:3}

/* v3: background lines, orange numbers, wilaya map */
.sd .bg-lines{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.sd .bg-lines svg{position:absolute;left:0;top:-40vh;width:100%;height:340vh;will-change:transform}
.sd .ln{fill:none;stroke-width:2.4;stroke-linecap:round;stroke-dasharray:900 240}
.sd .ln.o{stroke:#F7A233;opacity:.36}
.sd .ln.b{stroke:#2A7BC0;opacity:.3}
.sd .ln.t{stroke-width:1.4;stroke-dasharray:420 180}
.sd .hdr,.sd main,.sd footer.ft{position:relative;z-index:2}
.sd .hdr{position:sticky;z-index:50}
.sd .hero{background:linear-gradient(180deg,rgba(237,245,252,.85) 0%,rgba(247,251,254,.6) 60%,rgba(255,255,255,0) 100%)}
.sd .soft{background:rgba(245,249,253,.72)}
.sd .wbox .n{color:var(--orange);opacity:1;font-size:40px;top:14px;left:18px;text-shadow:0 6px 16px rgba(247,162,51,.25)}
.sd .wbox.hl .n{color:var(--orange-2)}
.sd .wbox b.big{color:#D98410;font-weight:800;margin-inline-start:4px;white-space:nowrap}
.sd .wbox.hl b.big{color:var(--orange-2)}
.sd .wbox ul.q li i{color:var(--blue);font-size:15px;margin-top:4px}
.sd .wbox ol.flow{list-style:none;counter-reset:f;display:grid;gap:8px}
.sd .wbox ol.flow li{counter-increment:f;display:flex;gap:10px;align-items:flex-start;font-size:15px;font-weight:600}
.sd .wbox ol.flow li::before{content:counter(f);width:24px;height:24px;border-radius:8px;background:#FFF1DC;color:#D98410;font-weight:800;font-size:13px;display:grid;place-items:center;flex-shrink:0;margin-top:2px}
.sd .wbox p.lead-w{color:#EAF3FB;font-size:17px;font-weight:700;margin-bottom:4px}
.sd .wbox.hl .note{background:rgba(255,255,255,.16);color:#fff}
.sd .wl{fill:#F7A233;stroke:#fff;stroke-width:1.1;stroke-linejoin:round;animation:sdwl .6s ease backwards;transform-box:fill-box;transition:fill .2s}
.sd .wl:nth-child(3n){fill:#F9B04D}.sd .wl:nth-child(3n+1){fill:#F59E2B}.sd .wl:nth-child(4n){fill:#FBBE66}
.sd .wl:hover{fill:#E8872A}
.sd .wls{filter:drop-shadow(0 12px 20px rgba(217,132,16,.28))}
.sd .map-bg{background:radial-gradient(circle at 50% 40%,#fff 0%,#EAF3FB 70%,#DDEBF7 100%)}
.sd .dot .core{fill:var(--blue);stroke:#fff;stroke-width:2.2}
.sd .dot .pulse{fill:var(--blue);opacity:.4}
.sd .dot:hover .core,.sd .dot.act .core{fill:#fff;stroke:var(--blue);stroke-width:3}
.sd .dot.deco .core{fill:#7FB2DD}
.sd .map-hint .blink{background:var(--blue);box-shadow:0 0 0 4px rgba(31,95,150,.2)}
@keyframes sdwl{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}
@media (max-width:560px){.sd .ln{stroke-width:1.8}.sd .bg-lines svg{width:260%;left:-80%}}

/* v4: animated hero heading + pillars */
.sd .hero h1 .h2l{color:var(--blue)}
.sd .h-anim .w{display:inline-block;opacity:0;transform:translateY(22px) scale(.96);filter:blur(6px);animation:sdword .7s cubic-bezier(.2,.9,.3,1.2) forwards}
.sd .h-anim .w1{animation-delay:.1s}.sd .h-anim .w2{animation-delay:.25s}.sd .h-anim .w3{animation-delay:.45s}.sd .h-anim .w4{animation-delay:.58s}.sd .h-anim .w5{animation-delay:.71s}.sd .h-anim .w6{animation-delay:.84s}
.sd .h-anim em.w{position:relative}
.sd .h-anim em.w::after{content:"";position:absolute;right:0;left:0;bottom:.06em;height:.16em;border-radius:99px;background:linear-gradient(90deg,rgba(247,162,51,.15),rgba(247,162,51,.55));transform:scaleX(0);transform-origin:right;animation:sdline .8s ease forwards 1s}
@keyframes sdword{to{opacity:1;transform:none;filter:none}}
@keyframes sdline{to{transform:scaleX(1)}}
.sd .pillars{list-style:none;display:flex;flex-direction:column;gap:12px;margin:6px 0 30px}
.sd .pillars li{display:flex;align-items:center;gap:14px;opacity:0;transform:translateX(-26px);animation:sdpill .6s cubic-bezier(.2,.9,.3,1.15) forwards;animation-delay:var(--d)}
.sd .pillars b{font-size:clamp(18px,1.9vw,22px);font-weight:800;color:var(--navy);position:relative}
.sd .pillars b::after{content:"";position:absolute;right:0;bottom:-3px;height:2px;width:0;background:var(--orange);border-radius:2px;animation:sdunder .6s ease forwards;animation-delay:calc(var(--d) + .45s)}
.sd .pillars .pi{position:relative;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,var(--orange),var(--orange-2));color:var(--orange-ink);font-size:18px;box-shadow:0 10px 22px -10px rgba(247,162,51,.9);flex-shrink:0}
.sd .pillars .pi::before{content:"";position:absolute;inset:-5px;border-radius:18px;border:2px solid rgba(247,162,51,.45);opacity:0;animation:sdring 2.8s ease-out infinite;animation-delay:calc(var(--d) + .8s)}
.sd .pillars li:nth-child(2) .pi{background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;box-shadow:0 10px 22px -10px rgba(31,95,150,.9)}
.sd .pillars li:nth-child(2) .pi::before{border-color:rgba(42,123,192,.45)}
.sd .pillars li:hover .pi{transform:rotate(-8deg) scale(1.08);transition:transform .25s}
@keyframes sdpill{to{opacity:1;transform:none}}
@keyframes sdunder{to{width:36%}}
@keyframes sdring{0%{opacity:.9;transform:scale(.9)}70%,100%{opacity:0;transform:scale(1.25)}}
.sd .hero-actions{opacity:0;animation:sdpill .6s ease forwards 1.9s;transform:translateY(12px)}
.sd .trust{opacity:0;animation:sdpill .6s ease forwards 2.1s}
.sd .eyebrow{animation:sdpill .5s ease both}
@media (max-width:860px){.sd .pillars{align-items:center}.sd .pillars li{transform:translateY(16px);width:100%;max-width:320px}.sd .pillars b::after{right:0}}
@media (prefers-reduced-motion:reduce){.sd .h-anim .w,.sd .pillars li,.sd .hero-actions,.sd .trust{opacity:1!important;transform:none!important;filter:none!important}}
.sd .hero h1 .w1{color:var(--navy)}
.sd .hero h1 .h2l .w{color:var(--blue)}
.sd .hero h1.h-anim{font-size:clamp(32px,4.4vw,54px)}

/* v5: DNA background, CTA account, inner pages */
.sd .sd-dna{position:fixed;inset:0;z-index:0;pointer-events:none;filter:blur(2.6px);opacity:.75}
.sd .bg-lines{display:none}
.sd .btn-app i{font-size:15px}
.sd .cta .acc{display:flex;flex-direction:column;align-items:center;gap:12px;margin-top:6px}
.sd .cta .acc .q{font-weight:800;color:var(--navy);font-size:18px}
.sd .page-hero{position:relative;z-index:1;padding:64px 0 34px;text-align:center}
.sd .page-hero .tag{display:inline-block;background:#FFF1DC;color:#B86A06;font-weight:800;font-size:13px;padding:6px 14px;border-radius:99px;margin-bottom:14px;animation:sdpill .5s ease both}
.sd .page-hero h1{font-size:clamp(30px,4vw,48px);font-weight:800;color:var(--navy);line-height:1.35;margin-bottom:12px}
.sd .page-hero h1 em{font-style:normal;color:var(--orange)}
.sd .page-hero p{max-width:720px;margin:0 auto;color:var(--muted);font-size:18px;font-weight:600;line-height:1.9}
.sd .rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.9,.3,1.1)}
.sd .rv.in{opacity:1;transform:none}
.sd .about-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.sd .acard{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 22px;box-shadow:var(--shadow-s);position:relative;overflow:hidden;transition:transform .25s,box-shadow .25s}
.sd .acard:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.sd .acard .ic{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;font-size:21px;background:linear-gradient(135deg,var(--blue),var(--blue-2));color:#fff;margin-bottom:14px;box-shadow:0 10px 22px -10px rgba(31,95,150,.9)}
.sd .acard.o .ic{background:linear-gradient(135deg,var(--orange),var(--orange-2));color:var(--orange-ink);box-shadow:0 10px 22px -10px rgba(247,162,51,.9)}
.sd .acard h3{font-size:19px;font-weight:800;color:var(--navy);margin-bottom:8px}
.sd .acard p{color:var(--muted);font-weight:600;line-height:1.9;font-size:15.5px}
.sd .mv{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.sd .mv .acard{padding:30px 26px}
.sd .mv .acard h3{font-size:22px}
.sd .story{background:linear-gradient(135deg,#183858,#1F5F96);color:#fff;border-radius:28px;padding:44px 34px;display:grid;grid-template-columns:1.3fr 1fr;gap:30px;align-items:center;box-shadow:var(--shadow)}
.sd .story h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:12px}
.sd .story p{color:#D8E7F5;font-weight:600;line-height:2;font-size:16.5px}
.sd .story ul{list-style:none;display:grid;gap:12px}
.sd .story li{display:flex;gap:12px;align-items:center;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);padding:12px 14px;border-radius:14px;font-weight:700}
.sd .story li i{color:var(--orange-2)}
.sd .contact-row{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:22px}
.sd .auth-card{max-width:460px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:26px;padding:36px 28px;box-shadow:var(--shadow);text-align:center;position:relative;z-index:1;animation:sdpill .6s ease both}
.sd .auth-card img{width:86px;height:86px;object-fit:contain;margin-bottom:10px}
.sd .auth-card h1{font-size:26px;font-weight:800;color:var(--navy);margin-bottom:8px}
.sd .auth-card p{color:var(--muted);font-weight:600;line-height:1.9;margin-bottom:22px}
.sd .auth-card .btn{width:100%}
.sd .auth-card .alt{margin-top:16px;font-weight:700;color:var(--muted)}
.sd .auth-card .alt a{color:var(--blue)}
@media (max-width:860px){.sd .about-grid,.sd .mv,.sd .story{grid-template-columns:1fr}.sd .story{padding:32px 22px}}
@media (prefers-reduced-motion:reduce){.sd .rv{opacity:1;transform:none}}
.sd .hero{background:linear-gradient(180deg,rgba(237,245,252,.5) 0%,rgba(247,251,254,.3) 60%,rgba(255,255,255,0) 100%)}
.sd .soft{background:rgba(245,249,253,.45)}

/* v6: SmartStudyDZ visual system — white → very light blue, faint edge symbols, clean centre */
html{background:#F3F8FE}
body.sd{background:linear-gradient(180deg,#FFFFFF 0%,#F7FAFE 35%,#EEF5FC 100%) fixed!important}
.sd .sd-dna{opacity:.2;filter:blur(3px);
  -webkit-mask-image:linear-gradient(90deg,#000 0,#000 9%,transparent 24%,transparent 76%,#000 91%,#000 100%);
  mask-image:linear-gradient(90deg,#000 0,#000 9%,transparent 24%,transparent 76%,#000 91%,#000 100%)}
.sd .sd-sym{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.sd-skin .sd-sym{z-index:-1}
.sd .sd-sym span{position:absolute;display:block;font-family:'Cairo',serif;font-weight:800;line-height:1;white-space:nowrap;will-change:transform;user-select:none}
.sd .sd-sym span.b{color:#2A7BC0}.sd .sd-sym span.o{color:#F7A233}
.sd .sd-sym span i{font-family:"Font Awesome 6 Free";font-weight:900}
.sd .hero,.sd .page-hero,.sd .dash-hero{background:transparent!important}
.sd .hero::before{display:none}
.sd .soft{background:rgba(255,255,255,.35)!important}
@media (max-width:760px){.sd .sd-dna{opacity:.12}}
.sd .sd-sym span.b{color:#2A7BC0;text-shadow:0 0 18px rgba(42,123,192,.45)}
.sd .sd-sym span.o{color:#F7A233;text-shadow:0 0 18px rgba(247,162,51,.5)}
.sd .sd-sym span{left:0;top:0}

.sd .btn-navy{background:linear-gradient(135deg,#183858,#1F5F96);color:#fff;border-color:transparent;box-shadow:0 12px 26px -14px rgba(24,56,88,.8)}
.sd .btn-navy:hover{background:linear-gradient(135deg,#1F5F96,#2A7BC0);color:#fff}
.sd .btn-out{background:#FFF1EE;color:#C2412B;border-color:#F6D2CA}
.sd .btn-out:hover{background:#C2412B;color:#fff;border-color:#C2412B}
.sd .nav a.nav-out{display:none;color:#C2412B}
@media (min-width:1025px){.sd .hero-actions{flex-wrap:nowrap;gap:10px}.sd .hero-actions .btn-lg{padding:14px 17px;font-size:15px;white-space:nowrap}}
@media (max-width:860px){.sd .hdr-cta .btn-out{display:none}.sd .nav.open a.nav-out{display:block;background:#FFF1EE;margin-top:6px}}

.sd .social-blk{padding:46px 0 10px;position:relative;z-index:1}
.sd .soc-head{text-align:center;margin-bottom:20px}
.sd .soc-head h3{font-size:clamp(22px,2.6vw,28px);font-weight:800;color:var(--navy);margin-bottom:6px}
.sd .soc-head p{color:var(--muted);font-weight:600;font-size:15.5px}
.sd .soc-row{display:flex;flex-wrap:wrap;justify-content:center;gap:14px}
.sd .btn-soc{background:#fff;color:var(--navy);border-color:var(--line);padding:15px 24px;font-size:16.5px;border-radius:14px;gap:10px;min-width:190px;justify-content:center;transition:transform .2s,border-color .2s,box-shadow .2s}
.sd .btn-soc i{font-size:21px}
.sd .btn-soc:hover{transform:translateY(-3px);box-shadow:0 14px 28px -16px rgba(24,56,88,.45)}
.sd .btn-soc .cnt{font-weight:800;font-size:13.5px;padding:3px 9px;border-radius:99px;margin-inline-start:2px}
.sd .btn-soc.ig i{color:#E1306C}.sd .btn-soc.ig:hover{border-color:#E1306C}.sd .btn-soc.ig .cnt{background:#FDE8F0;color:#C2185B}
.sd .btn-soc.fb i{color:#1877F2}.sd .btn-soc.fb:hover{border-color:#1877F2}.sd .btn-soc.fb .cnt{background:#E7F0FE;color:#1459C7}
.sd .btn-soc.yt i{color:#FF0000}.sd .btn-soc.yt:hover{border-color:#FF0000}
@media (max-width:760px){.sd .social-blk{padding:34px 0 0}.sd .soc-row{flex-direction:column;align-items:stretch}.sd .btn-soc{width:100%}}

/* perf: no live blur over the animated background on desktop */
.sd .sd-dna{filter:none}
.sd .hdr{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.96)}
.sd .sd-sym{contain:strict}
.sd .sd-sym span{backface-visibility:hidden}

/* review button + modal */
.sd .map-col{display:flex;flex-direction:column;align-items:center;gap:16px;min-width:0}
.sd .map-col>.map-box{width:100%}
.sd .map-col>.btn-rev{order:3}
@media (max-width:860px){.sd .map-col{order:2}}
.sd .btn-rev{background:#fff;color:var(--navy);border-color:var(--line);padding:12px 22px;font-size:15.5px;border-radius:14px;box-shadow:0 10px 24px -16px rgba(24,56,88,.5)}
.sd .btn-rev i{color:var(--orange);font-size:17px}
.sd .btn-rev:hover{border-color:var(--orange);transform:translateY(-2px)}
.sd .rev-modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:16px;background:rgba(15,34,56,.45);opacity:0;transition:opacity .2s}
.sd .rev-modal[hidden]{display:none}
.sd .rev-modal.on{opacity:1}
.sd .rev-card{position:relative;width:100%;max-width:440px;max-height:calc(100vh - 32px);overflow:auto;background:#fff;border-radius:22px;padding:26px 24px 22px;box-shadow:0 30px 70px -20px rgba(15,34,56,.55);transform:translateY(14px) scale(.98);transition:transform .25s}
.sd .rev-modal.on .rev-card{transform:none}
.sd .rev-x{position:absolute;top:12px;left:14px;width:34px;height:34px;border-radius:10px;border:0;background:var(--sky);color:var(--navy);font-size:20px;cursor:pointer}
.sd .rev-card h3{font-size:22px;font-weight:800;color:var(--navy);display:flex;gap:10px;align-items:center}
.sd .rev-card h3 i{color:var(--orange)}
.sd .rev-sub{color:var(--muted);font-weight:600;margin:4px 0 16px}
.sd .rev-card label{display:block;font-weight:800;color:var(--navy);font-size:14px;margin-bottom:12px}
.sd .rev-card input[type=text],.sd .rev-card textarea{display:block;width:100%;margin-top:6px;font:inherit;font-weight:600;font-size:15px;padding:11px 13px;border:1.5px solid var(--line);border-radius:12px;background:#F7FAFD;color:var(--navy);resize:vertical}
.sd .rev-card input[type=text]:focus,.sd .rev-card textarea:focus{outline:0;border-color:var(--blue);background:#fff}
.sd .rev-stars{display:flex;flex-direction:row-reverse;justify-content:flex-end;gap:4px;margin:0 0 12px}
.sd .rev-stars input{position:absolute;opacity:0;pointer-events:none}
.sd .rev-stars label{margin:0;font-size:30px;line-height:1;color:#D6E3F0;cursor:pointer;transition:color .15s,transform .15s}
.sd .rev-stars label:hover,.sd .rev-stars label:hover~label,.sd .rev-stars input:checked~label{color:var(--orange)}
.sd .rev-stars label:hover{transform:scale(1.15)}
.sd .rev-stars input:focus-visible+label{outline:2px solid var(--blue);border-radius:6px}
.sd .rev-send{width:100%;justify-content:center;margin-top:4px}
.sd .rev-send:disabled{opacity:.6}
.sd .rev-err{color:#C2412B;font-weight:700;margin-top:10px;text-align:center}
.sd .rev-ok{text-align:center;padding:26px 6px 10px}
.sd .rev-ok i{font-size:46px;color:#138A5B}
.sd .rev-ok b{display:block;font-size:21px;color:var(--navy);margin:10px 0 4px}
.sd .rev-ok p{color:var(--muted);font-weight:600}
.sd .rev-toast{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);z-index:90;background:#138A5B;color:#fff;font-weight:800;padding:12px 18px;border-radius:14px;box-shadow:0 16px 30px -14px rgba(0,0,0,.4);animation:sdpill .5s ease both,revOut .4s ease 5s forwards}
@keyframes revOut{to{opacity:0;visibility:hidden}}
@media (max-width:760px){.sd .rev-toast{bottom:84px;width:calc(100% - 32px);text-align:center}}