/* =====================================================================
   AL AHAD FOR ENGINEERING PROJECTS  -  official / institutional theme
   Palette: BLACK, WHITE and the logo BLUE. Blue is kept for buttons,
   links and the active states only. Change --blue to recolour them all.
   ===================================================================== */
:root{
  --blue:#0000F8;
  --black:#000;
  --white:#fff;
  --grey-bg:#F4F4F4;
  --line:#D4D4D4;
  --ink:#111;
  --mute:#4B4B4B;
  --f:'Public Sans',system-ui,'Segoe UI',Arial,sans-serif;
  --h:'Source Serif 4',Georgia,'Times New Roman',serif;
}
html[lang=ar]{--f:'Cairo','Public Sans',sans-serif;--h:'Cairo','Source Serif 4',serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;font-family:var(--f);color:var(--ink);background:var(--white);line-height:1.65;font-size:16px;overflow-x:hidden}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--h);line-height:1.18;margin:0 0 .5em;color:var(--black);font-weight:600}
p{margin:0 0 1em}
.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px}
.hero :focus-visible,.sec.dark :focus-visible,.footer :focus-visible,.phead :focus-visible{outline-color:#fff}
.skip{position:absolute;inset-inline-start:-999px;top:8px;background:var(--blue);color:#fff;padding:10px 16px;z-index:300;font-weight:600}
.skip:focus{inset-inline-start:8px}
.ic{width:24px;height:24px;flex:none}.ic.big{width:30px;height:30px}.ic.sm{width:16px;height:16px}
.num{unicode-bidi:isolate;direction:ltr}

/* ---------- header: one white row, logo left, menu centre, quote button right ---------- */
.header{position:sticky;top:0;z-index:100;background:#fff;border-bottom:1px solid var(--line);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 6px 22px -12px rgba(0,0,0,.35)}
.bar{display:flex;align-items:center;gap:28px;height:78px}
.brand{display:flex;align-items:center;gap:13px;color:var(--black);font:700 20px/1.1 var(--h)}
.brand .bt{display:block;white-space:nowrap;letter-spacing:.01em}
.brand small{display:block;font:500 12px var(--f);color:var(--mute);margin-top:4px;letter-spacing:0}
.logo-badge{display:grid;place-items:center;width:52px;height:52px;flex:none}
.logo-badge img{width:52px;height:52px}
.nav{display:flex;gap:2px;margin-inline:auto;height:100%}
.nav a{display:flex;align-items:center;padding:0 15px;font-size:14.5px;font-weight:600;color:var(--black);border-bottom:4px solid transparent;margin-bottom:-1px;transition:color .2s,border-color .2s}
.nav a:hover{color:var(--blue)}
.nav a.active{color:var(--blue);border-bottom-color:var(--blue)}
.actions{display:flex;align-items:center;gap:10px}
.lang{background:none;border:1px solid var(--black);color:var(--black);border-radius:2px;padding:8px 14px;font:600 13px var(--f);cursor:pointer;transition:background .2s,color .2s}
.lang:hover{background:var(--black);color:#fff}
.burger{display:none;background:none;border:1px solid var(--black);width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:5px;padding:0;border-radius:2px}
.burger span{display:block;width:20px;height:2px;background:var(--black);transition:.25s}
.burger[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded=true] span:nth-child(2){opacity:0}
.burger[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.progress{position:fixed;top:0;inset-inline:0;height:3px;z-index:120;background:var(--blue);transform:scaleX(0);transform-origin:left;pointer-events:none}

/* ---------- buttons: simple flat blocks ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:2px solid transparent;border-radius:2px;padding:14px 28px;font:700 15px var(--f);cursor:pointer;transition:background .2s,color .2s,border-color .2s}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-blue{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-blue:hover{background:var(--black);border-color:var(--black)}
.btn-ghost{background:#fff;color:var(--black);border-color:#fff}
.btn-ghost:hover{background:var(--black);color:#fff;border-color:var(--black)}
.btn-dark{background:var(--black);color:#fff;border-color:var(--black)}
.btn-dark:hover{background:var(--blue);border-color:var(--blue)}
.row{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- HERO: 6-photo slideshow, lighter overlay ---------- */
.hero{position:relative;background:#222;color:#fff;overflow:hidden;min-height:clamp(520px,calc(100svh - 80px),700px);display:flex;align-items:center}
.slides{position:absolute;inset:0}
.slide{position:absolute;inset:0;opacity:0;transition:opacity 1.6s ease}
.slide.on{opacity:1;z-index:1}
.slide img{width:100%;height:100%;object-fit:cover;transform:scale(1.02)}
.slide.on img{animation:kb 9s ease-out forwards}
@keyframes kb{from{transform:scale(1.02)}to{transform:scale(1.09) translate3d(-1%,-.6%,0)}}
.hero-shade{position:absolute;inset:0;z-index:2;background:linear-gradient(90deg,rgba(0,0,0,.6) 0%,rgba(0,0,0,.34) 46%,rgba(0,0,0,0) 85%)}
.hero-in{position:relative;z-index:3;padding:72px 0}
.hero-copy{max-width:700px;text-shadow:0 1px 14px rgba(0,0,0,.45)}
.hero-copy>*{animation:heroin .9s cubic-bezier(.2,.75,.2,1) backwards}
.hero-copy>:nth-child(2){animation-delay:.12s}.hero-copy>:nth-child(3){animation-delay:.24s}.hero-copy>:nth-child(4){animation-delay:.36s}.hero-copy>:nth-child(5){animation-delay:.48s}
@keyframes heroin{from{opacity:0;transform:translateY(26px)}}
.tag{margin:0 0 16px;font:600 17px var(--h);color:#fff}
.tag-sub{display:block;margin-top:3px;font:500 14.5px var(--f);color:#f0f0f0}
.hero h1{color:#fff;font-size:clamp(36px,5.4vw,66px);font-weight:700;letter-spacing:-.015em;margin-bottom:22px}
.lead{font-size:clamp(16px,1.8vw,19px);color:#fff;max-width:56ch;margin-bottom:26px}
.hero-copy .btn,.hero-copy .row{text-shadow:none}

/* ---------- sections ---------- */
.sec{padding:96px 0}
.sec.alt{background:var(--grey-bg);border-block:1px solid var(--line)}
.sec.dark{background:var(--black);color:#d9d9d9}
.sec-h{max-width:660px;margin-bottom:52px}
.sec-h:before,.hl:before{content:"";display:block;width:56px;height:5px;background:var(--black);margin-bottom:20px;transition:width .9s .25s cubic-bezier(.2,.8,.2,1)}
.sec.dark .sec-h:before{background:#fff}
.sec-h h2,.split h2,.duo h2{font-size:clamp(28px,3.4vw,40px);font-weight:700;letter-spacing:-.01em}
.sec-h p{color:var(--mute);font-size:17px}
.sec-h.light h2{color:#fff}.sec-h.light p{color:#c4c4c4}
.split,.duo{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:start}
.split p,.duo p{color:var(--mute);font-size:17px}
.duo-text>p{margin:0 0 18px}
.hl{margin-bottom:0}
.tick{list-style:none;padding:0;margin:26px 0}
.tick li{position:relative;padding-inline-start:32px;margin-bottom:12px;font-weight:500}
.tick li:before{content:"";position:absolute;inset-inline-start:2px;top:.45em;width:15px;height:8px;border-left:3px solid var(--black);border-bottom:3px solid var(--black);transform:rotate(-45deg)}
.sec.dark .tick li:before{border-color:#fff}
.link{font-weight:700;color:var(--blue);border-bottom:2px solid var(--blue);padding-bottom:2px}
.link:hover{color:var(--black);border-color:var(--black)}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

/* cards */
.card{background:#fff;border:1px solid var(--line);border-top:4px solid var(--black);padding:32px 28px;position:relative;transition:border-color .2s,box-shadow .2s}
.card:hover{border-color:var(--black);box-shadow:0 14px 30px -22px rgba(0,0,0,.55)}
.card .ic.big{width:42px;height:42px;color:var(--black);margin-bottom:20px;transition:color .2s}
.card:hover .ic.big{color:var(--blue)}
.card h3{font-size:21px;font-weight:700}
.card p{color:var(--mute);font-size:15.5px;margin:0}
.card .tick{margin:20px 0 0;font-size:15px}
.pillar{padding:30px 26px;border:1px solid #3a3a3a;border-top:4px solid #fff;background:var(--black)}
.pillar .ic{color:#fff;margin-bottom:18px;width:34px;height:34px}
.pillar h3{color:#fff;font-size:20px;font-weight:700}
.pillar p{font-size:15.5px;margin:0;color:#c8c8c8}
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:s}
.steps li{counter-increment:s;border-top:1px solid #4a4a4a;padding-top:62px;position:relative}
.steps li:before{content:counter(s);position:absolute;top:-1px;inset-inline-start:0;width:42px;height:42px;background:#fff;color:var(--black);font:700 18px/42px var(--h);text-align:center}
.steps h3{color:#fff;font-size:19px;font-weight:700}.steps p{font-size:15.5px;margin:0;color:#c8c8c8}

/* projects */
.tabs{display:flex;flex-wrap:wrap;gap:0;margin-bottom:36px;border-bottom:1px solid var(--line)}
.tab{background:none;border:0;border-bottom:4px solid transparent;margin-bottom:-1px;color:var(--mute);padding:12px 22px;font:600 15px var(--f);cursor:pointer;transition:color .2s,border-color .2s}
.tab:hover{color:var(--black)}
.tab.on{color:var(--black);border-bottom-color:var(--black)}
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.proj{background:#fff;border:1px solid var(--line);overflow:hidden;transition:border-color .2s,box-shadow .2s}
.proj:hover{border-color:var(--black);box-shadow:0 14px 30px -22px rgba(0,0,0,.55)}
.proj[hidden]{display:none}.proj.pop{animation:pop .35s}
@keyframes pop{from{opacity:0;transform:scale(.97)}}
.thumb{position:relative;aspect-ratio:3/2;overflow:hidden;background:#222}
.proj.ph .thumb{aspect-ratio:4/3}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.proj.ph .thumb img{object-position:center 35%}
.proj.win .thumb img{object-position:center}
.proj:hover .thumb img{transform:scale(1.04)}
.chip{position:absolute;bottom:0;inset-inline-start:0;background:var(--black);color:#fff;font:600 13px var(--f);padding:6px 14px}
.proj-b{padding:22px 24px 26px;border-top:4px solid var(--black)}
.proj-b h3{font-size:20px;font-weight:700;margin-bottom:8px}.proj-b p{font-size:15px;color:var(--mute);margin:0}
.loc{display:flex;align-items:center;gap:6px;color:var(--black)!important;font-weight:600;margin-bottom:10px!important}
.center{text-align:center;margin:46px 0 0}

/* page head */
.phead{background:#222;position:relative;padding:72px 0 64px;overflow:hidden;color:#fff;border-bottom:1px solid var(--line)}
.phead:before{content:"";position:absolute;inset:0;background:url(../assets/hero/hero-4.jpg) center/cover}
.phead:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.72) 10%,rgba(0,0,0,.25))}
.phead .container{position:relative;z-index:1}
.phead h1{color:#fff;font-size:clamp(34px,5vw,52px);font-weight:700}
.phead .lead{margin:0}
.crumb{display:flex;gap:10px;color:#eee;font-size:14px;margin-bottom:18px}
.crumb a:hover{color:#fff;text-decoration:underline}

/* closing band */
.band{background:var(--grey-bg);border-block:1px solid var(--line);padding:64px 0;color:var(--black)}
.band-in{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px}
.band h2{color:var(--black);margin:0;font-size:clamp(24px,3vw,34px);font-weight:700}
.slogan{color:var(--mute)!important;font:600 17px var(--h);margin:8px 0 0!important}
.footer .slogan{color:#fff!important;margin:14px 0!important}

/* contact + forms */
.cgrid{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:start}
.clist{list-style:none;padding:0;margin:26px 0 0;display:grid;gap:22px}
.clist li{display:flex;gap:16px;align-items:flex-start}
.clist .ic{background:var(--black);color:#fff;padding:11px;width:48px;height:48px}
.clist strong{display:block;font-family:var(--h);font-size:17px}
.clist span,.clist a{color:var(--mute)}.clist a:hover{color:var(--blue)}
.formcard:hover{box-shadow:none;border-color:var(--line)}
.formcard h2{font-size:26px}
.form{display:grid;gap:18px}
.field label{display:block;font-weight:600;font-size:14.5px;margin-bottom:6px;color:var(--black)}
.field input,.field select,.field textarea{width:100%;font:400 15.5px var(--f);padding:13px 14px;border:1px solid #777;border-radius:0;background:#fff;color:var(--ink);transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,0,248,.25)}
.field .bad{border-color:#000;box-shadow:0 0 0 2px #000}
.form-msg{margin:0;font-size:14.5px;font-weight:600;min-height:1.2em;color:var(--black)}
.form-msg.ok{color:var(--blue)}
.form-msg a{text-decoration:underline;color:var(--blue)}
.fine{font-size:13px;color:var(--mute);margin:0}

/* modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:200;display:grid;place-items:center;padding:20px;overflow:auto}
.modal[hidden]{display:none}
.modal-box{background:#fff;padding:34px;width:min(540px,100%);position:relative;border-top:8px solid var(--black);animation:pop .3s}
.modal-box h2{font-size:26px}.sub{color:var(--mute)}
.modal-x{position:absolute;top:14px;inset-inline-end:14px;background:none;border:0;cursor:pointer;color:var(--black);padding:6px}
.modal-x:hover{color:var(--blue)}

/* floating quote button */
.fab{position:fixed;inset-inline-end:18px;bottom:20px;z-index:90}
.fab-q{position:relative;display:grid;place-items:center;width:58px;height:58px;padding:0;background:var(--blue);color:#fff;border:2px solid #fff;border-radius:50%;cursor:pointer;box-shadow:0 10px 24px -6px rgba(0,0,0,.6);transition:background .2s;animation:fabbob 3.2s ease-in-out infinite}
.fab-q .ic{width:26px;height:26px}
.fab-q:after{content:"";position:absolute;inset:-2px;border-radius:50%;border:2px solid var(--blue);animation:fabring 2.4s ease-out infinite;pointer-events:none}
.fab-q:hover{background:var(--black);animation-play-state:paused}
.fab-q:hover:after{border-color:var(--black)}
@keyframes fabring{0%{transform:scale(1);opacity:.85}100%{transform:scale(1.7);opacity:0}}
@keyframes fabbob{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* footer */
.footer{background:var(--black);color:#cfcfcf;padding:68px 0 0;font-size:15px}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:48px;padding-bottom:48px}
.footer .brand{color:#fff;margin-bottom:6px}.footer .brand small{color:#c4c4c4}
.footer .logo-badge{background:#fff;width:60px;height:60px}.footer .logo-badge img{width:48px;height:48px}
.footer h4{color:#fff;font-size:18px;font-family:var(--h)}
.links{display:grid;gap:10px;justify-items:start}
.links a:hover,.foot-base a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer p{margin-top:16px;max-width:42ch}
.social{display:flex;gap:10px;margin-top:8px}
.social a{display:grid;place-items:center;width:44px;height:44px;border:1px solid #fff;color:#fff;transition:background .2s,color .2s}
.social a:hover{background:#fff;color:var(--black)}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid #3a3a3a;padding:22px 0;font-size:14px}

/* ---------- scroll animations ---------- */
.js .sr:not(.in2){opacity:0}
.sr.in2{animation:srin .85s calc(var(--i,0)*110ms) cubic-bezier(.2,.75,.2,1) backwards}
@keyframes srin{from{opacity:0;transform:translateY(38px)}}
.js .sec-h:not(.in2):before{width:0}
.js .rv:not(.in){opacity:0;transform:translateY(28px)}
.rv{transition:opacity .85s,transform .85s cubic-bezier(.2,.75,.2,1)}
.js .hl:not(.in):before{width:0}
.js .stag:not(.in) li{opacity:0;transform:translateX(-18px)}
.stag li{transition:opacity .6s,transform .6s}
.stag.in li:nth-child(1){transition-delay:.25s}.stag.in li:nth-child(2){transition-delay:.45s}.stag.in li:nth-child(3){transition-delay:.65s}.stag.in li:nth-child(4){transition-delay:.85s}
.duo-text>p.rv:nth-child(2){transition-delay:.15s}.duo-text>p.rv:nth-child(3){transition-delay:.3s}

/* arabic */
html[lang=ar] body{line-height:1.85}
html[lang=ar] h1,html[lang=ar] h2,html[lang=ar] h3,html[lang=ar] h4{letter-spacing:0;line-height:1.4;font-weight:700}
html[lang=ar] .brand .bt,html[lang=ar] .tag-sub{letter-spacing:0}
html[lang=ar] [data-ar][dir=rtl]{unicode-bidi:isolate}
html[dir=rtl] input[type=tel]{direction:ltr;text-align:right}
html[dir=rtl] .field select{background-position:left 12px center}
html[dir=rtl] .hero-shade{transform:scaleX(-1)}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .grid4{grid-template-columns:repeat(2,1fr)}.steps{grid-template-columns:repeat(2,1fr);row-gap:40px}.pgrid,.grid3{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:900px){
  .bar{height:70px}
  .burger{display:flex}
  .actions .btn-sm{display:none}.actions{margin-inline-start:auto}
  .nav{position:fixed;inset:71px 0 auto 0;background:#fff;flex-direction:column;height:auto;padding:8px 24px 24px;border-bottom:6px solid var(--black);transform:translateY(-130%);visibility:hidden;transition:transform .3s,visibility .3s;margin:0;box-shadow:0 20px 30px -20px rgba(0,0,0,.5)}
  .nav.open{transform:none;visibility:visible}
  .nav a{padding:16px 4px;font-size:17px;border-bottom:1px solid var(--line);margin:0}
  .nav a.active{border-bottom-color:var(--line);box-shadow:inset 4px 0 var(--blue);padding-inline-start:16px}
  .split,.duo,.cgrid,.grid2,.foot-grid{grid-template-columns:1fr}
  .split,.duo{gap:26px}.sec{padding:64px 0}
  html{scroll-padding-top:84px}
}
@media(max-width:760px){.m-hide{display:none!important}}
@media(max-width:620px){
  .container{width:calc(100% - 36px)}
  .grid4,.grid3,.pgrid,.steps{grid-template-columns:1fr}
  .btn{padding:14px 10px;font-size:14px}
  .hero-copy .row,.band .row{flex-wrap:nowrap;gap:10px;width:100%}
  .hero-copy .row .btn,.band .row .btn{flex:1 1 0;min-width:0;text-align:center}
  .hero{min-height:520px}
  .hero-in{padding:48px 0}
  .hero h1{font-size:33px}
  .hero-shade{background:linear-gradient(0deg,rgba(0,0,0,.62),rgba(0,0,0,.4))}
  .brand{font-size:18px}.brand small{font-size:11px}.logo-badge,.logo-badge img{width:46px;height:46px}
  .modal-box{padding:28px 20px}
  .fab-q{width:52px;height:52px}
  .tab{padding:11px 14px;font-size:14px}
}
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .js .sr:not(.in2),.js .rv:not(.in),.js .stag:not(.in) li{opacity:1;transform:none}
  .js .sec-h:not(.in2):before,.js .hl:not(.in):before{width:56px}
  .progress{display:none}
}

/* contact: storefront photo + small map */
.cvisit{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:stretch}
.cphoto{margin:0;border:1px solid var(--line);border-top:4px solid var(--black);overflow:hidden;background:#fff}
.cphoto img{display:block;width:100%;height:100%;object-fit:cover;min-height:240px}
.cmap{border:1px solid var(--line);border-top:4px solid var(--black);overflow:hidden;background:#fff;min-height:240px}
.cmap iframe{display:block;width:100%;height:100%;min-height:240px;border:0}
@media(max-width:860px){.cvisit{grid-template-columns:1fr}.cphoto img{height:auto;min-height:0}.cmap,.cmap iframe{min-height:260px;height:260px}}

/* about: building photo under "Who we are" */
.aphoto{margin:32px 0 0;border:1px solid var(--line);border-top:4px solid var(--black);overflow:hidden;background:#fff}
.aphoto img{display:block;width:100%;height:auto}