/* StudyTech DZ — styles. Themes: html[data-theme="a" | "b" | "c"] (A = black + orange brand theme matching the logo, default) */
@font-face{font-family:"Plex";src:url(assets/fonts/IBMPlexSansArabic-Medium.woff2) format("woff2");font-weight:400 500;font-display:swap}
@font-face{font-family:"Plex";src:url(assets/fonts/IBMPlexSansArabic-SemiBold.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"Plex";src:url(assets/fonts/IBMPlexSansArabic-Bold.woff2) format("woff2");font-weight:700 900;font-display:swap}
@font-face{font-family:"Poppins";src:url(assets/fonts/Poppins-Bold.woff2) format("woff2");font-weight:700;font-display:swap}
@font-face{font-family:"Lalezar";src:url(assets/fonts/Lalezar.woff2) format("woff2");font-weight:400;font-display:swap}

:root,html[data-theme="a"]{
  --bg:#0B0B0D; --bg2:#141417; --surface:rgba(255,255,255,.035); --surface2:rgba(255,255,255,.06);
  --line:rgba(255,255,255,.09); --line2:rgba(255,255,255,.16);
  --text:#F5F5F5; --muted:#A8A8B0; --faint:#7c7c85;
  --a1:#FF7F09; --a2:#FF9A3C; --a3:#FF9A3C;
  --grad:linear-gradient(100deg,#FFB067 0%,#FF9A3C 40%,#FF7F09 100%);
  --btn:linear-gradient(100deg,#FF9A3C,#FF7F09 55%,#E86A00); --btn-text:#111; --btn-shadow:0 10px 30px -10px rgba(255,127,9,.6);
  --glow1:rgba(255,127,9,.30); --glow2:rgba(232,106,0,.18);
  --radius:20px; --radius-sm:12px;
  --display:"Plex",system-ui,sans-serif; --display-w:700;
  --body:"Plex",system-ui,-apple-system,"Segoe UI",Tahoma,sans-serif;
  --nav-bg:rgba(11,11,13,.78); --input-bg:rgba(255,255,255,.04);
  --card-shadow:0 1px 0 rgba(255,255,255,.04) inset, 0 20px 50px -30px rgba(0,0,0,.8);
  --blur:blur(14px);
  color-scheme:dark;
}
html[data-theme="b"]{
  --bg:#f7f6f2; --bg2:#efede7; --surface:#ffffff; --surface2:#f3f1ec;
  --line:#e4e1d9; --line2:#d3cfc4;
  --text:#0e0e0e; --muted:#55524b; --faint:#8a867c;
  --a1:#ff5a1f; --a2:#ff5a1f; --a3:#ff5a1f;
  --grad:linear-gradient(0deg,#ff5a1f,#ff5a1f);
  --btn:#0e0e0e; --btn-text:#fff; --btn-shadow:none;
  --glow1:transparent; --glow2:transparent;
  --radius:10px; --radius-sm:8px;
  --display:"Plex",system-ui,sans-serif; --display-w:700;
  --nav-bg:rgba(247,246,242,.86); --input-bg:#fff;
  --card-shadow:0 1px 2px rgba(0,0,0,.04);
  --blur:none;
  color-scheme:light;
}
html[data-theme="c"]{
  --bg:#14062b; --bg2:#1d0a3b; --surface:rgba(255,255,255,.07); --surface2:rgba(255,255,255,.1);
  --line:rgba(255,255,255,.14); --line2:rgba(255,255,255,.24);
  --text:#fff; --muted:#d9c9f5; --faint:#a993d1;
  --a1:#ff3d8b; --a2:#8b3dff; --a3:#ffd23f;
  --grad:linear-gradient(100deg,#ffd23f,#ff6aa5 50%,#c38bff);
  --btn:linear-gradient(100deg,#ff3d8b,#8b3dff); --btn-text:#fff; --btn-shadow:0 12px 34px -10px rgba(255,61,139,.7);
  --glow1:rgba(255,61,139,.55); --glow2:rgba(139,61,255,.6);
  --radius:28px; --radius-sm:16px;
  --display:"Lalezar","Plex",system-ui,sans-serif; --display-w:400;
  --nav-bg:rgba(20,6,43,.7); --input-bg:rgba(255,255,255,.08);
  --card-shadow:0 20px 50px -25px rgba(0,0,0,.6);
  --blur:blur(14px);
  color-scheme:dark;
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--body);font-weight:500;font-size:16px;line-height:1.75;overflow-x:clip;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,video{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3{text-wrap:balance;font-family:var(--display);font-weight:var(--display-w);line-height:1.25;margin:0;letter-spacing:0}
p{margin:0}
svg{width:1em;height:1em;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex:none}
[dir="ltr"]{font-family:"Poppins",var(--body)}
.chips [dir="ltr"],.tag[dir="ltr"],.num[dir="ltr"]{font-family:"Poppins",var(--body)}
:focus-visible{outline:2px solid var(--a1);outline-offset:3px;border-radius:6px}
.skip{position:absolute;inset-inline-start:12px;top:-60px;z-index:100;background:var(--text);color:var(--bg);padding:10px 16px;border-radius:10px;transition:top .2s}
.skip:focus{top:12px}
.wrap{width:100%;max-width:1200px;margin-inline:auto;padding-inline:clamp(18px,5vw,40px)}
.narrow{max-width:860px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-box-decoration-break:clone;box-decoration-break:clone}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:46px;padding:10px 20px;border-radius:999px;font-weight:700;font-size:15px;line-height:1.2;border:1px solid transparent;cursor:pointer;transition:transform .2s ease,box-shadow .25s ease,background-color .2s,border-color .2s;white-space:nowrap}
.btn svg{font-size:18px}
.btn-primary{background:var(--btn);color:var(--btn-text);box-shadow:var(--btn-shadow)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{background:var(--surface);border-color:var(--line2);color:var(--text);backdrop-filter:var(--blur)}
.btn-ghost:hover{border-color:var(--a1)}
.btn-lg{min-height:54px;padding:14px 28px;font-size:16px}
.btn-block{width:100%}
html[data-theme="b"] .btn{border-radius:10px}

/* ---------- header ---------- */
.nav{position:sticky;top:0;z-index:50;background:var(--nav-bg);backdrop-filter:saturate(1.4) var(--blur);-webkit-backdrop-filter:saturate(1.4) var(--blur);border-bottom:1px solid transparent;transition:border-color .3s}
.nav.scrolled{border-bottom-color:var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;min-height:44px}
.logo-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--btn);color:#fff;font-family:"Poppins",sans-serif;font-weight:700;font-size:19px;box-shadow:var(--btn-shadow)}
html[data-theme="b"] .logo-mark{background:var(--a1)}
.logo-txt{font-family:"Poppins",sans-serif;font-weight:700;font-size:19px;letter-spacing:-.2px}
.logo-txt b{margin-inline-start:4px;padding:1px 6px;border-radius:6px;font-size:12px;vertical-align:3px;background:var(--surface2);border:1px solid var(--line2);color:var(--a3)}
html[data-theme="b"] .logo-txt b{color:var(--a1)}
.links{display:flex;align-items:center;gap:6px}
.links>a:not(.btn){padding:10px 14px;border-radius:999px;color:var(--muted);font-weight:600;font-size:15px;transition:color .2s,background-color .2s}
.links>a:not(.btn):hover{color:var(--text);background:var(--surface)}
.nav-cta{margin-inline-start:8px}
.menu-social{display:none}
.burger{display:none;width:46px;height:46px;border-radius:12px;border:1px solid var(--line2);background:var(--surface);cursor:pointer;padding:0;position:relative}
.burger span{position:absolute;inset-inline:13px;height:2px;border-radius:2px;background:var(--text);transition:transform .3s,opacity .2s}
.burger span:nth-child(1){top:15px}.burger span:nth-child(2){top:22px}.burger span:nth-child(3){top:29px}
.nav.open .burger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.open .burger span:nth-child(2){opacity:0}
.nav.open .burger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (max-width:959px){
  .burger{display:block}
  .links{position:fixed;inset:68px 0 auto 0;height:calc(100dvh - 68px);flex-direction:column;align-items:stretch;gap:4px;padding:18px clamp(18px,5vw,40px) 28px;background:var(--bg);border-top:1px solid var(--line);overflow-y:auto;opacity:0;visibility:hidden;transform:translateY(-8px);transition:opacity .25s,transform .25s,visibility .25s}
  .nav.open .links{opacity:1;visibility:visible;transform:none}
  .links>a:not(.btn){font-size:20px;padding:14px 6px;border-radius:0;border-bottom:1px solid var(--line);color:var(--text);font-family:var(--display);font-weight:var(--display-w)}
  .links>a:not(.btn):hover{background:none}
  .nav-cta{margin:18px 0 0;min-height:56px;font-size:17px}
  .menu-social{display:flex;gap:12px;justify-content:center;margin-top:20px}
  .menu-social a{display:grid;place-items:center;width:48px;height:48px;border-radius:14px;border:1px solid var(--line2);background:var(--surface);font-size:22px}
  body.menu-open{overflow:hidden}
}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding-block:clamp(36px,7vw,96px) clamp(48px,8vw,110px);isolation:isolate}
.glow{position:absolute;z-index:-1;border-radius:50%;filter:blur(80px);pointer-events:none}
.g1{width:520px;height:520px;background:var(--glow1);top:-180px;inset-inline-start:-140px;animation:float1 14s ease-in-out infinite alternate}
.g2{width:460px;height:460px;background:var(--glow2);bottom:-200px;inset-inline-end:-120px;animation:float2 16s ease-in-out infinite alternate}
@keyframes float1{to{transform:translate(-60px,60px) scale(1.1)}}
@keyframes float2{to{transform:translate(50px,-40px) scale(1.15)}}
.grid-bg{position:absolute;inset:0;z-index:-2;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 30%,transparent 75%);opacity:.55}
html[data-theme="b"] .grid-bg{opacity:.7}
.hero-in{display:grid;gap:clamp(40px,6vw,64px);align-items:center}
@media (min-width:960px){.hero-in{grid-template-columns:1.02fr .98fr}}
.eyebrow{display:inline-flex;align-items:center;gap:10px;padding:7px 14px;border-radius:999px;border:1px solid var(--line2);background:var(--surface);backdrop-filter:var(--blur);font-size:13.5px;font-weight:600;color:var(--muted);line-height:1.5}
.dot{width:8px;height:8px;border-radius:50%;background:var(--a1);box-shadow:0 0 0 4px color-mix(in srgb,var(--a1) 25%,transparent);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px color-mix(in srgb,var(--a1) 0%,transparent)}}
.hero h1 .grad{white-space:nowrap}
.hero h1{font-size:clamp(2.1rem,1.15rem + 4.2vw,4.1rem);margin-top:20px;line-height:1.28}
html[data-theme="c"] .hero h1{line-height:1.4;font-size:clamp(2.4rem,1.3rem + 4.4vw,4.4rem)}
.lead{margin-top:18px;font-size:clamp(1.02rem,.95rem + .4vw,1.2rem);color:var(--muted);max-width:36em;line-height:1.85}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.chips{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:28px 0 0}
.chips li{padding:5px 13px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:13px;color:var(--muted);font-weight:700}
@media (max-width:420px){.cta-row .btn{flex:1 1 100%}}

/* hero visual */
.hero-vis{position:relative;width:100%;max-width:600px;margin-inline:auto;aspect-ratio:1/0.86}
@media (max-width:959px){.hero-vis{margin-top:24px}}
.screen{position:absolute;top:4%;inset-inline-start:0;width:88%;border-radius:16px;overflow:hidden;background:#111113;border:1px solid var(--line2);box-shadow:0 40px 80px -30px rgba(0,0,0,.75),0 0 0 6px var(--surface);transform:perspective(1600px) rotateY(-9deg) rotateX(3deg);transform-origin:left center}
html[data-theme="b"] .screen{box-shadow:0 30px 60px -30px rgba(0,0,0,.35),0 0 0 6px #fff;transform:none}
.screen-bar{display:flex;align-items:center;gap:6px;height:30px;padding-inline:12px;background:#1a1a1e;direction:ltr}
.screen-bar i{width:9px;height:9px;border-radius:50%;background:#ff5f57}.screen-bar i:nth-child(2){background:#febc2e}.screen-bar i:nth-child(3){background:#28c840}
.screen-bar span{margin-inline-start:10px;font-size:11px;color:#8e8e96;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.screen video{width:100%;aspect-ratio:16/9;object-fit:cover}
.phone{position:absolute;bottom:0;inset-inline-end:2%;width:31%;aspect-ratio:9/19;border-radius:26px;padding:7px;background:#0B0B0D;border:1px solid rgba(255,127,9,.35);box-shadow:0 40px 70px -25px rgba(0,0,0,.8);animation:bob 6s ease-in-out infinite}
.phone video{width:100%;height:100%;object-fit:cover;border-radius:20px}
@keyframes bob{50%{transform:translateY(-10px)}}
.float-card{position:absolute;display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:16px;background:var(--nav-bg);border:1px solid var(--line2);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur);box-shadow:var(--card-shadow);line-height:1.3}
html[data-theme="b"] .float-card{background:#fff}
.float-card b{display:block;font-family:"Poppins",sans-serif;font-size:14px}
.float-card small{display:block;font-size:12px;color:var(--muted)}
.fc-ic{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--surface2);color:var(--a3);font-size:19px}
html[data-theme="b"] .fc-ic{color:var(--a1)}
.fc1{top:-9%;inset-inline-start:4%;animation:bob 7s ease-in-out infinite .6s}
.fc2{bottom:8%;inset-inline-start:4%;animation:bob 8s ease-in-out infinite 1.2s}
@media (max-width:520px){.float-card{padding:8px 10px;gap:8px}.fc-ic{width:28px;height:28px;font-size:16px}.float-card b{font-size:12.5px}.float-card small{font-size:11px}.phone{border-radius:20px;padding:5px}.phone video{border-radius:15px}}

/* ---------- marquee ---------- */
.marquee{overflow:hidden;border-block:1px solid var(--line);background:var(--bg2);padding-block:16px;direction:ltr}
.marquee-track{display:flex;gap:28px;width:max-content;animation:marq 38s linear infinite;align-items:center}
.marquee span{font-family:var(--display);font-weight:var(--display-w);font-size:clamp(1.05rem,.9rem + .8vw,1.5rem);white-space:nowrap;color:var(--text);opacity:.9}
.marquee i{font-style:normal;color:var(--a1)}
.marquee span{direction:rtl;unicode-bidi:isolate}
@keyframes marq{to{transform:translateX(-50%)}}

/* ---------- sections ---------- */
.section{padding-block:clamp(64px,10vw,120px)}
.section.alt{background:var(--bg2);border-block:1px solid var(--line)}
.sec-head{max-width:720px;margin-bottom:clamp(32px,5vw,56px)}
.kicker{display:inline-block;font-size:13.5px;font-weight:700;color:var(--a3);margin-bottom:10px;letter-spacing:.2px}
html[data-theme="b"] .kicker{color:var(--a1)}
.sec-head h2,.order-side h2{font-size:clamp(1.75rem,1.1rem + 2.6vw,2.9rem)}
html[data-theme="c"] .sec-head h2,html[data-theme="c"] .order-side h2{font-size:clamp(2rem,1.2rem + 3vw,3.3rem);line-height:1.35}
.sub{margin-top:14px;color:var(--muted);font-size:clamp(1rem,.95rem + .3vw,1.12rem);max-width:40em}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--card-shadow);backdrop-filter:var(--blur);-webkit-backdrop-filter:var(--blur)}

/* services */
.svc-grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr))}
@media (min-width:640px) and (max-width:959px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:960px){.svc-grid{grid-template-columns:repeat(3,1fr)}}
.svc{padding:26px 24px 28px;overflow:hidden;transition:transform .3s ease,border-color .3s}
.svc::before{content:"";position:absolute;inset:0;background:radial-gradient(420px circle at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--a1) 16%,transparent),transparent 60%);opacity:0;transition:opacity .3s;pointer-events:none}
.svc:hover{transform:translateY(-4px);border-color:var(--line2)}
.svc:hover::before{opacity:1}
.svc-icon{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;font-size:26px;color:var(--btn-text);background:var(--btn);box-shadow:var(--btn-shadow);margin-bottom:18px}
html[data-theme="b"] .svc-icon{background:#0e0e0e;color:#fff}
.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--muted);padding:3px 10px;border-radius:999px;border:1px solid var(--line);margin-bottom:12px}
.svc h3{font-size:1.32rem;margin-bottom:8px}
html[data-theme="c"] .svc h3{font-size:1.55rem}
.svc p{color:var(--muted);font-size:15.5px;line-height:1.8}

/* portfolio */
.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.filter{min-height:44px;padding:8px 18px;border-radius:999px;border:1px solid var(--line2);background:var(--surface);color:var(--muted);font-weight:700;font-size:14.5px;cursor:pointer;transition:all .2s}
.filter:hover{color:var(--text)}
@media (max-width:420px){.filter{padding:8px 14px;font-size:14px}.filters{gap:6px}}
.filter.is-on{background:var(--btn);border-color:transparent;color:var(--btn-text)}
.work-grid{columns:2;column-gap:12px}
@media (min-width:768px){.work-grid{column-gap:16px}}
@media (min-width:960px){.work-grid{columns:3}}
.work{break-inside:avoid;margin:0 0 12px;display:block}
@media (min-width:768px){.work{margin-bottom:16px}}
.work.hide{display:none}
.media{position:relative;display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden;background:var(--surface2);cursor:zoom-in}
.media video{cursor:default}
.media img,.media video{width:100%;height:auto;transition:transform .6s cubic-bezier(.2,.7,.2,1)}
button.media:hover img{transform:scale(1.04)}
.spec{position:absolute;top:10px;inset-inline-start:10px;padding:4px 10px;border-radius:999px;background:rgba(11,11,13,.78);border:1px solid rgba(255,255,255,.2);color:#FFB067;font-size:11.5px;font-weight:700;line-height:1.5;backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.spec-inline{position:static;display:inline-block;margin-inline-end:6px;vertical-align:1px}
.live{position:absolute;bottom:10px;inset-inline-end:10px;display:inline-flex;align-items:center;gap:4px;padding:3px 9px;border-radius:999px;background:rgba(11,11,13,.72);color:#fff;font-size:11.5px;font-weight:700}
.live svg{font-size:11px;stroke:none}
.work figcaption{display:flex;flex-direction:column;gap:1px;padding:10px 4px 2px;line-height:1.5}
.work figcaption strong{font-size:14.5px;font-weight:700}
.work figcaption span{font-size:12.5px;color:var(--faint)}
@media (max-width:480px){.work figcaption strong{font-size:13px}.work figcaption span{font-size:11.5px}.spec{font-size:10.5px;padding:3px 8px;top:7px;inset-inline-start:7px}}
.note{margin-top:20px;color:var(--faint);font-size:13.5px;line-height:1.8}

/* steps */
.steps{list-style:none;margin:0;padding:0;display:grid;gap:16px}
@media (min-width:768px){.steps{grid-template-columns:repeat(3,1fr)}}
.step{padding:28px 24px 30px;overflow:hidden}
.num{display:block;font-size:3.4rem;font-weight:700;line-height:1;margin-bottom:16px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.95}
.step h3{font-size:1.3rem;margin-bottom:8px}
.step p{color:var(--muted);font-size:15.5px}

/* faq */
.faq-list{display:grid;gap:12px}
.faq{border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);transition:border-color .2s}
.faq[open]{border-color:var(--line2)}
.faq summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:60px;padding:14px 20px;cursor:pointer;font-weight:700;font-size:16.5px;line-height:1.6}
.faq summary::-webkit-details-marker{display:none}
.pm{position:relative;flex:none;width:28px;height:28px;border-radius:50%;border:1px solid var(--line2)}
.pm::before,.pm::after{content:"";position:absolute;top:50%;left:50%;width:11px;height:2px;margin:-1px 0 0 -5.5px;background:currentColor;border-radius:2px;transition:transform .25s}
.pm::after{transform:rotate(90deg)}
.faq[open] .pm::after{transform:rotate(0)}
.faq p{padding:0 20px 18px;color:var(--muted);font-size:15.5px}

/* order */
.order-in{display:grid;gap:clamp(32px,5vw,56px);align-items:start}
@media (min-width:960px){.order-in{grid-template-columns:.85fr 1.15fr}.order-side{position:sticky;top:110px}}
.ticks{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:12px}
.ticks li{position:relative;padding-inline-start:32px;color:var(--muted);font-size:15.5px}
.ticks li::before{content:"";position:absolute;inset-inline-start:0;top:4px;width:20px;height:20px;border-radius:50%;background:var(--btn)}
.ticks li::after{content:"";position:absolute;inset-inline-start:6px;top:10px;width:8px;height:4px;border-inline-start:2px solid #111;border-bottom:2px solid #111;transform:rotate(-45deg)}
html[dir="rtl"] .ticks li::after{transform:rotate(45deg) scaleX(-1)}
.contact-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.social{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:8px 16px;border-radius:999px;border:1px solid var(--line2);background:var(--surface);font-weight:700;font-size:14.5px;transition:border-color .2s}
.social svg{font-size:20px}
.social:hover{border-color:var(--a1)}
.form{padding:clamp(20px,4vw,34px);display:grid;gap:18px}
.row2{display:grid;gap:18px}
@media (min-width:560px){.row2{grid-template-columns:1fr 1fr}}
.field{display:grid;gap:7px;min-width:0}
.field label{font-weight:700;font-size:14.5px}
.opt{color:var(--faint);font-weight:500}
.field input,.field select,.field textarea{width:100%;min-width:0;min-height:52px;padding:12px 15px;border-radius:var(--radius-sm);border:1px solid var(--line2);background:var(--input-bg);font-size:16px;line-height:1.5;transition:border-color .2s,box-shadow .2s;-webkit-appearance:none;appearance:none}
.field input[dir="ltr"]{text-align:right}
.field input[dir="ltr"]::placeholder{text-align:right}
.field input[dir="ltr"]:not(:placeholder-shown){text-align:left}
.field textarea{resize:vertical;min-height:130px}
.field select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239aa0bd' stroke-width='2' stroke-linecap='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:left 14px center;background-size:18px;padding-left:42px}
.field select option{background:var(--bg);color:var(--text)}
.field input[type="date"]{min-height:52px;display:block}
.field input::placeholder,.field textarea::placeholder{color:var(--faint);opacity:1}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--a1);box-shadow:0 0 0 4px color-mix(in srgb,var(--a1) 22%,transparent)}
.err{display:none;color:#ff7a8a;font-size:13px;font-weight:600}
html[data-theme="b"] .err{color:#c62828}
.field.invalid input,.field.invalid select,.field.invalid textarea{border-color:#ff6b7d}
.field.invalid .err{display:block}
.hp{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.spinner{display:none;width:18px;height:18px;border-radius:50%;border:2px solid rgba(0,0,0,.25);border-top-color:#111;animation:spin .8s linear infinite}
.form.busy .spinner{display:inline-block}
.form.busy button[type=submit]{opacity:.8;pointer-events:none}
@keyframes spin{to{transform:rotate(360deg)}}
.form-msg{font-size:15px;font-weight:600;min-height:0}
.form-msg:empty{display:none}
.form-msg.ok{color:#4ade80}.form-msg.bad{color:#ff7a8a}
html[data-theme="b"] .form-msg.ok{color:#15803d}
.success{text-align:center;padding:clamp(28px,6vw,48px) clamp(18px,4vw,30px);display:grid;gap:14px;justify-items:center}
.success .ok-ic{display:grid;place-items:center;width:72px;height:72px;border-radius:50%;background:var(--btn);box-shadow:var(--btn-shadow);color:var(--btn-text);font-size:34px}
.success h3{font-size:1.6rem}
.success p{color:var(--muted);max-width:30em}
.success .btn-row{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:6px}

/* footer */
.footer{border-top:1px solid var(--line);background:var(--bg2);padding-top:48px}
.foot-in{display:grid;gap:28px}
@media (min-width:860px){.foot-in{grid-template-columns:1.3fr 2fr auto;align-items:start}}
.foot-brand p{margin-top:12px;color:var(--muted);font-size:14.5px;max-width:28em}
.foot-links{display:flex;flex-wrap:wrap;gap:4px 6px}
.foot-links a{padding:10px 10px;color:var(--muted);font-weight:600;font-size:14.5px}
.foot-links a:hover{color:var(--text)}
.foot-social{display:flex;gap:10px}
.foot-social a{display:grid;place-items:center;width:46px;height:46px;border-radius:14px;border:1px solid var(--line2);background:var(--surface);font-size:21px;transition:border-color .2s,transform .2s}
.foot-social a:hover{border-color:var(--a1);transform:translateY(-2px)}
.foot-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding-block:22px 28px;margin-top:36px;border-top:1px solid var(--line);color:var(--faint);font-size:13.5px}

/* whatsapp float */
.wa-float{position:fixed;bottom:max(18px,env(safe-area-inset-bottom));left:18px;z-index:40;display:grid;place-items:center;width:58px;height:58px;border-radius:50%;background:#25d366;color:#fff;font-size:30px;box-shadow:0 12px 30px -8px rgba(37,211,102,.6);transition:transform .2s, opacity .3s}
.wa-float:hover{transform:scale(1.06)}
.wa-float svg{stroke-width:1.6}
body.menu-open .wa-float{opacity:0;pointer-events:none}

/* lightbox */
.lightbox{border:0;padding:0;background:transparent;max-width:min(96vw,1200px);max-height:92vh;overflow:visible}
.lightbox::backdrop{background:rgba(5,5,6,.9);backdrop-filter:blur(6px)}
.lightbox img{max-width:min(96vw,1200px);max-height:88vh;width:auto;height:auto;border-radius:14px;margin:auto}
.lb-close{position:fixed;top:14px;right:14px;width:48px;height:48px;border-radius:50%;border:1px solid rgba(255,255,255,.25);background:rgba(20,20,23,.8);color:#fff;font-size:18px;cursor:pointer}

/* reveal */
.js [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .8s cubic-bezier(.2,.7,.2,1) var(--d,0ms),transform .8s cubic-bezier(.2,.7,.2,1) var(--d,0ms)}
.js [data-reveal].in{opacity:1;transform:none}
.js .hero-vis[data-reveal]{transform:translateY(26px) scale(.97)}
.js .hero-vis[data-reveal].in{transform:none}

/* theme C extras */
html[data-theme="c"] .hero{background:radial-gradient(120% 90% at 85% 0%,#5b1fa8 0%,transparent 55%),radial-gradient(90% 80% at 0% 100%,#a3195f 0%,transparent 60%)}
html[data-theme="c"] .grid-bg{display:none}
html[data-theme="c"] .glow{filter:blur(60px)}
html[data-theme="c"] .hero::after{content:"";position:absolute;z-index:-1;width:clamp(180px,30vw,380px);aspect-ratio:1;border-radius:42% 58% 63% 37%/45% 41% 59% 55%;background:linear-gradient(140deg,#ffd23f,#ff3d8b 55%,#8b3dff);top:12%;inset-inline-end:-6%;opacity:.35;filter:blur(2px);animation:blob 12s ease-in-out infinite alternate}
@keyframes blob{to{border-radius:58% 42% 37% 63%/55% 59% 41% 45%;transform:rotate(25deg) scale(1.08)}}
html[data-theme="c"] .marquee{background:linear-gradient(90deg,#ff3d8b,#8b3dff);border:0}
html[data-theme="c"] .marquee span,html[data-theme="c"] .marquee i{color:#fff}
html[data-theme="b"] .marquee{background:#0e0e0e;border:0}
html[data-theme="b"] .marquee span{color:#fff}
html[data-theme="b"] .hero h1{font-weight:700;letter-spacing:-.5px}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js [data-reveal]{opacity:1;transform:none}
}

/* =====================================================================
   Brand layer (2026-11) — black + orange, matching the StudyTech DZ logo
   ===================================================================== */
::selection{background:rgba(255,127,9,.35);color:#fff}
.logo{gap:9px}
.logo-img{width:44px;height:44px;border-radius:50%;flex:none;box-shadow:0 0 0 1px rgba(255,127,9,.45),0 0 18px -2px rgba(255,127,9,.55);transition:transform .4s cubic-bezier(.2,.7,.2,1),box-shadow .3s}
.logo:hover .logo-img{transform:rotate(-8deg) scale(1.05);box-shadow:0 0 0 1px rgba(255,127,9,.7),0 0 26px 0 rgba(255,127,9,.6)}
.logo-txt em{font-style:normal;color:var(--a1)}
.logo-txt b{color:#111;background:var(--a1);border-color:transparent}
@media (max-width:380px){.logo-txt{font-size:17px}.logo-img{width:40px;height:40px}}
.foot-brand .logo-img{width:56px;height:56px}

/* buttons: shine + glow */
.btn-primary{position:relative;overflow:hidden;font-weight:800}
.btn-primary::after{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 30%,rgba(255,255,255,.45) 50%,transparent 70%);transform:translateX(-120%);transition:transform .7s ease}
.btn-primary:hover::after{transform:translateX(120%)}
.btn-primary:hover{box-shadow:0 14px 38px -10px rgba(255,127,9,.85)}
.btn-ghost:hover{border-color:rgba(255,127,9,.6);color:#fff}
.links>a:not(.btn):hover{color:var(--a2)}

/* headline highlight — slow moving orange sheen */
.grad{background-image:linear-gradient(100deg,#FFB067,#FF7F09 35%,#FFC48A 50%,#FF7F09 65%,#E86A00);background-size:220% 100%;animation:sheen 7s ease-in-out infinite alternate}
@keyframes sheen{to{background-position:100% 0}}
.hero h1 .grad{filter:drop-shadow(0 4px 24px rgba(255,127,9,.25))}

/* hero background: orange grid that drifts + sparks */
.grid-bg{background-image:linear-gradient(rgba(255,127,9,.09) 1px,transparent 1px),linear-gradient(90deg,rgba(255,127,9,.09) 1px,transparent 1px);animation:gridmove 22s linear infinite}
@keyframes gridmove{to{background-position:0 56px,56px 0}}
.sparks{position:absolute;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.sparks i{position:absolute;bottom:-10px;width:4px;height:4px;border-radius:50%;background:#FF9A3C;box-shadow:0 0 10px 2px rgba(255,127,9,.7);opacity:0;animation:rise 9s linear infinite}
.sparks i:nth-child(1){left:6%;animation-delay:0s}.sparks i:nth-child(2){left:18%;animation-delay:2.4s;animation-duration:11s}
.sparks i:nth-child(3){left:29%;animation-delay:5s;width:3px;height:3px}.sparks i:nth-child(4){left:41%;animation-delay:1.2s;animation-duration:12s}
.sparks i:nth-child(5){left:53%;animation-delay:6.5s;width:5px;height:5px}.sparks i:nth-child(6){left:64%;animation-delay:3.3s;animation-duration:10s}
.sparks i:nth-child(7){left:73%;animation-delay:7.8s;width:3px;height:3px}.sparks i:nth-child(8){left:82%;animation-delay:.8s;animation-duration:13s}
.sparks i:nth-child(9){left:90%;animation-delay:4.4s}.sparks i:nth-child(10){left:96%;animation-delay:8.6s;width:3px;height:3px}
@keyframes rise{0%{transform:translateY(0);opacity:0}10%{opacity:.9}80%{opacity:.6}100%{transform:translateY(-110vh) translateX(30px);opacity:0}}
.eyebrow{border-color:rgba(255,127,9,.35)}
.chips li{transition:border-color .2s,color .2s}
.chips li:hover{border-color:rgba(255,127,9,.55);color:var(--text)}

/* hero logo orb (replaces the phone mock) */
.orb{position:absolute;bottom:-2%;inset-inline-end:-1%;width:44%;aspect-ratio:1;border-radius:50%;display:grid;place-items:center;animation:bob 6s ease-in-out infinite;filter:drop-shadow(0 30px 50px rgba(0,0,0,.7))}
.orb::before{content:"";position:absolute;inset:-14%;border-radius:50%;background:radial-gradient(circle,rgba(255,127,9,.45) 0%,rgba(255,127,9,.12) 45%,transparent 70%);animation:breathe 4s ease-in-out infinite}
.orb-ring{position:absolute;inset:-5%;border-radius:50%;background:conic-gradient(from 0deg,transparent 0 55%,rgba(255,154,60,.15) 65%,#FF7F09 88%,#FFD1A1 94%,transparent 100%);-webkit-mask:radial-gradient(circle,transparent 66%,#000 67.5%,#000 70%,transparent 71.5%);mask:radial-gradient(circle,transparent 66%,#000 67.5%,#000 70%,transparent 71.5%);animation:spinr 5s linear infinite}
.orb img{position:relative;width:100%;height:100%;border-radius:50%}
@keyframes spinr{to{transform:rotate(360deg)}}
@keyframes breathe{50%{transform:scale(1.08);opacity:.7}}
.screen{box-shadow:0 40px 80px -30px rgba(0,0,0,.75),0 0 0 6px var(--surface),0 0 60px -20px rgba(255,127,9,.35)}
.fc1{inset-inline-start:auto;inset-inline-end:2%}
.fc2{bottom:12%}
.fc-ic{background:rgba(255,127,9,.14);color:var(--a1)}

/* marquee: orange band */
.marquee{background:linear-gradient(90deg,#E86A00,#FF7F09 30%,#FF9A3C 50%,#FF7F09 70%,#E86A00);border:0;transform:rotate(-1.2deg);margin-block:-6px;position:relative;z-index:2;box-shadow:0 12px 40px -12px rgba(255,127,9,.55)}
.marquee span{color:#111;opacity:1}
.marquee i{color:#111;opacity:.75}

/* sections: glowing divider line */
.section{position:relative}
.section::before{content:"";position:absolute;top:0;left:50%;width:min(720px,80%);height:1px;transform:translateX(-50%);background:linear-gradient(90deg,transparent,rgba(255,127,9,.7),transparent);pointer-events:none}
.section.alt{background:radial-gradient(80% 60% at 50% 0%,rgba(255,127,9,.06),transparent 70%),var(--bg2)}
.kicker{color:var(--a1)}
.kicker::before{content:"";display:inline-block;width:18px;height:2px;margin-inline-end:8px;vertical-align:4px;border-radius:2px;background:var(--a1)}

/* glassy cards with orange edge glow */
.card{transition:transform .35s cubic-bezier(.2,.7,.2,1),border-color .3s,box-shadow .35s}
.card:hover{border-color:rgba(255,127,9,.45);box-shadow:0 1px 0 rgba(255,255,255,.05) inset,0 0 0 1px rgba(255,127,9,.12),0 24px 60px -30px rgba(255,127,9,.45)}
.form.card:hover{transform:none}
.svc-icon{border-radius:50%;box-shadow:0 0 0 5px rgba(255,127,9,.12),var(--btn-shadow)}
.step .num{background:linear-gradient(180deg,#FFB067,#FF7F09 60%,#E86A00);-webkit-background-clip:text;background-clip:text}
.faq details[open]{border-color:rgba(255,127,9,.4)}
.faq summary:hover{color:var(--a2)}

/* portfolio */
.filter.is-on{box-shadow:0 8px 24px -10px rgba(255,127,9,.8)}
.filter:hover{border-color:rgba(255,127,9,.5)}
.media{transition:border-color .3s,box-shadow .35s}
.work:hover .media{border-color:rgba(255,127,9,.55);box-shadow:0 0 0 1px rgba(255,127,9,.2),0 18px 50px -24px rgba(255,127,9,.6)}
.live{gap:6px;padding:4px 10px 4px 5px;background:rgba(11,11,13,.78);border:1px solid rgba(255,127,9,.5);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.live svg{display:grid;width:20px;height:20px;padding:5px 4px 5px 6px;border-radius:50%;background:var(--a1);color:#111;box-shadow:0 0 12px rgba(255,127,9,.7);font-size:10px}
.snd{position:absolute;top:10px;inset-inline-end:10px;padding:3px 9px;border-radius:999px;background:rgba(11,11,13,.72);color:#fff;font-size:11px;font-weight:700;pointer-events:none;transition:opacity .3s}
.media.on .snd,.media.on .live{opacity:0}
video.clip{cursor:pointer}
@media (max-width:480px){.snd{font-size:10px;top:7px;inset-inline-end:7px}}

/* payment methods */
.pay{margin-top:28px;padding:clamp(18px,3vw,26px);display:grid;gap:16px;align-items:center;background:linear-gradient(135deg,rgba(255,127,9,.10),rgba(255,255,255,.02) 55%);border-color:rgba(255,127,9,.3)}
@media (min-width:860px){.pay{grid-template-columns:1fr auto}}
.pay-kick{display:inline-block;font-weight:800;font-size:1.15rem;color:var(--text)}
.pay-kick::before{content:"";display:inline-block;width:10px;height:10px;margin-inline-end:8px;border-radius:50%;background:var(--a1);box-shadow:0 0 10px rgba(255,127,9,.8)}
.pay-head p{margin-top:4px;color:var(--muted);font-size:15px}
.pay-badges{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.pay-badges li{display:inline-flex;align-items:center;gap:9px;padding:8px 14px 8px 10px;border-radius:14px;background:#141417;border:1px solid rgba(255,127,9,.35);font-weight:700;font-size:14.5px;line-height:1.3;white-space:nowrap}
.pay-ic{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--btn);color:#111;font-size:19px;flex:none}
.pay-ic svg{stroke-width:1.9}
.pay-badges.sm{gap:6px}
.pay-badges.sm li{padding:5px 10px 5px 6px;gap:6px;font-size:12.5px;border-radius:10px}
.pay-badges.sm .pay-ic{width:24px;height:24px;border-radius:7px;font-size:14px}
.pay-mini{margin-top:22px;padding-top:18px;border-top:1px dashed rgba(255,127,9,.3)}
.pay-mini p{color:var(--muted);font-size:14px;margin-bottom:10px}
.foot-pay{margin-top:16px;display:grid;gap:8px}
.foot-pay>span{font-size:13px;color:var(--faint);font-weight:700}

/* footer glow */
.footer{background:radial-gradient(60% 80% at 50% 0%,rgba(255,127,9,.07),transparent 70%),var(--bg2);border-top-color:rgba(255,127,9,.25)}
.foot-social a:hover{box-shadow:0 0 18px -4px rgba(255,127,9,.7)}

@media (max-width:520px){.orb{width:46%}}
@media (prefers-reduced-motion:reduce){
  .grad,.grid-bg,.sparks i,.orb,.orb::before,.orb-ring,.btn-primary::after{animation:none!important}
  .sparks{display:none}
}
.pay-wa{margin-top:12px;min-height:42px;padding:8px 16px;font-size:14px;border-color:rgba(37,211,102,.45)}
.pay-wa svg{color:#25d366;font-size:18px}
.pay-link{color:var(--muted);text-decoration:underline;text-decoration-color:rgba(255,127,9,.5);text-underline-offset:4px}
.pay-link:hover{color:var(--a2)}