/* =========================================================
   Trust & Creativity — Design System
   Palette: Deep Navy / Midnight Blue / Professional Blue / Teal Accent
   Type: Inter (Latin) + IBM Plex Sans Arabic (Arabic)
   ========================================================= */

:root{
  --navy:#0B1F3A;
  --midnight:#14335C;
  --pro-blue:#2C5AA0;
  --teal:#1FA7A1;
  --teal-light:#3CC7A6;
  --ink:#1B2733;
  --ink-soft:#5B6A7A;
  --cool-gray:#F5F7F9;
  --border:#E3E8EE;
  --white:#FFFFFF;

  --font-en:'Inter',-apple-system,Segoe UI,sans-serif;
  --font-ar:'IBM Plex Sans Arabic','Tahoma',sans-serif;

  --radius-sm:6px;
  --radius-md:10px;
  --radius-lg:18px;
  --shadow-sm:0 2px 10px rgba(11,31,58,.06);
  --shadow-md:0 10px 30px rgba(11,31,58,.10);
  --shadow-lg:0 24px 60px rgba(11,31,58,.16);
  --container:1200px;
  --transition:.25s cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}

html,body{max-width:100%;overflow-x:hidden}

html{scroll-behavior:smooth}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}

body{
  font-family:var(--font-en);
  color:var(--ink);
  background:var(--white);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
html[lang="ar"] body{font-family:var(--font-ar);}

img,svg{display:block;max-width:100%}
a{color:inherit}
button{font-family:inherit}

.container{max-width:var(--container);margin:0 auto;padding:0 24px}

h1,h2,h3,h4{font-weight:700;line-height:1.2;color:var(--navy)}
h1{font-size:clamp(2rem,4vw,3rem)}
h2{font-size:clamp(1.6rem,3vw,2.2rem)}
h3{font-size:1.2rem;font-weight:600}
p{color:var(--ink-soft)}

.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Skip link */
.skip-link{
  position:absolute;top:-48px;left:16px;background:var(--navy);color:var(--white);
  padding:10px 18px;border-radius:var(--radius-sm);z-index:2000;transition:top var(--transition);
}
.skip-link:focus{top:16px}

:focus-visible{outline:3px solid var(--teal);outline-offset:2px}

/* =========== Language visibility =========== */
.lang-ar,.lang-en{}
html[lang="en"] .lang-ar{display:none}
html[lang="ar"] .lang-en{display:none}
html[lang="ar"] body{direction:rtl;text-align:right}
html[lang="ar"] .header-inner,
html[lang="ar"] nav ul,
html[lang="ar"] .lang-switch,
html[lang="ar"] .hero-actions,
html[lang="ar"] .contact-line,
html[lang="ar"] .footer-social{flex-direction:row-reverse}
html[lang="ar"] .about-points li i,
html[lang="ar"] .card-list li i,
html[lang="ar"] .contact-line i{margin-inline-end:0;margin-inline-start:.6rem}

/* =========================== Header =========================== */
.site-header{
  position:fixed;top:0;inset-inline:0;width:100%;z-index:1000;
  background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:box-shadow var(--transition),border-color var(--transition);
}
.site-header.scrolled{box-shadow:var(--shadow-sm);border-color:var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;padding:16px 0}
.header-inner>*{min-width:0}

.brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:0}
.brand-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--navy),var(--teal));position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:9px;border:2px solid rgba(255,255,255,.85);border-radius:4px}
.brand-name{font-weight:800;font-size:1.05rem;color:var(--navy);letter-spacing:.2px}
.brand-tag{font-size:.72rem;color:var(--teal);font-weight:600}

nav{flex:1;display:flex;justify-content:center}
nav ul{list-style:none;display:flex;gap:2rem}
nav a{text-decoration:none;font-weight:600;font-size:.92rem;color:var(--ink);position:relative;padding:6px 0}
nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--teal);transform:scaleX(0);transition:transform var(--transition)}
nav a:hover::after,nav a:focus-visible::after{transform:scaleX(1)}

.header-actions{display:flex;align-items:center;gap:1rem}
.lang-switch{display:flex;border:1px solid var(--border);border-radius:20px;padding:2px;gap:2px}
.lang-btn{border:0;background:transparent;color:var(--ink-soft);padding:5px 12px;border-radius:16px;font-size:.8rem;font-weight:700;cursor:pointer;transition:all var(--transition)}
.lang-btn[aria-pressed="true"]{background:var(--navy);color:var(--white)}

.mobile-menu-toggle{display:none;background:none;border:0;font-size:1.5rem;color:var(--navy);cursor:pointer;width:40px;height:40px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 26px;border-radius:var(--radius-sm);font-weight:700;font-size:.92rem;
  text-decoration:none;border:2px solid transparent;cursor:pointer;transition:all var(--transition);
  white-space:nowrap;
}
.btn-primary{background:var(--navy);color:var(--white)}
.btn-primary:hover{background:var(--midnight)}
.btn-outline{background:transparent;color:var(--navy);border-color:var(--border)}
.btn-outline:hover{border-color:var(--navy)}
.btn-on-dark{background:var(--white);color:var(--navy)}
.btn-on-dark:hover{background:transparent;color:var(--white);border-color:var(--white)}
.btn-ghost-on-dark{background:transparent;color:var(--white);border-color:rgba(255,255,255,.55)}
.btn-ghost-on-dark:hover{background:rgba(255,255,255,.12)}

/* =========================== Hero =========================== */
.hero{
  position:relative;overflow:hidden;color:var(--white);
  padding:calc(76px + 88px) 0 96px;
  background:linear-gradient(125deg,var(--navy) 0%,var(--midnight) 55%,var(--teal) 130%);
}
.hero-grid{position:absolute;inset:0;opacity:.18;pointer-events:none}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center}
.hero-kicker{display:inline-flex;align-items:center;gap:8px;font-size:.85rem;font-weight:700;color:var(--teal-light);margin-bottom:1rem}
.hero-kicker::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--teal-light)}
.hero h1{color:var(--white);font-size:clamp(2.1rem,4.2vw,3.1rem);margin-bottom:1.1rem}
.hero-tagline{font-size:1.08rem;color:rgba(255,255,255,.88);max-width:52ch;margin-bottom:2rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem;margin-bottom:2.2rem}
.hero-strip{display:flex;flex-wrap:wrap;gap:1.6rem;padding-top:1.6rem;border-top:1px solid rgba(255,255,255,.18)}
.hero-strip span{display:flex;align-items:center;gap:8px;font-size:.86rem;color:rgba(255,255,255,.85);font-weight:600}
.hero-strip i{color:var(--teal-light)}

.hero-visual{position:relative;aspect-ratio:1/1;max-width:420px;margin-inline-start:auto}
.hero-visual .ring{position:absolute;border:1px solid rgba(255,255,255,.25);border-radius:50%}
.hero-visual .ring.r1{inset:0}
.hero-visual .ring.r2{inset:14%}
.hero-visual .ring.r3{inset:28%}
.hero-visual .core{
  position:absolute;inset:32%;border-radius:26px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;
  backdrop-filter:blur(6px);
}
.hero-visual .core i{font-size:2.6rem;color:var(--white)}

/* =========================== Sections =========================== */
.section{padding:96px 0}
.section.alt{background:var(--cool-gray)}
.section-head{max-width:640px;margin:0 auto 3rem;text-align:center}
html[lang="ar"] .section-head{text-align:center}
.eyebrow{color:var(--teal);font-weight:700;font-size:.85rem;margin-bottom:.6rem}
.section-head p{margin-top:.8rem}

/* =========================== About =========================== */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:3.5rem;align-items:center}
.about-copy h3{margin-bottom:.8rem}
.about-copy p{margin-bottom:1.2rem}
.about-points{list-style:none;display:grid;gap:.7rem}
.about-points li{display:flex;align-items:flex-start;gap:.6rem;font-size:.95rem;color:var(--ink)}
.about-points i{color:var(--teal);margin-top:4px;flex:none}

.about-panel{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2.2rem;box-shadow:var(--shadow-md)}
.about-panel h3{margin-bottom:1rem}

/* =========================== Services =========================== */
.service-categories{display:grid;gap:2.4rem}
.service-category{display:grid;grid-template-columns:.85fr 2fr;gap:2rem;padding-bottom:2.4rem;border-bottom:1px solid var(--border)}
.service-categories>.service-category:last-child{border-bottom:0;padding-bottom:0}
.service-category-label{position:sticky;top:110px;align-self:start}
.service-category-label .num{font-size:.8rem;font-weight:700;color:var(--teal);letter-spacing:.4px}
.service-category-label h3{margin-top:.4rem;font-size:1.3rem}

.service-list{display:grid;grid-template-columns:repeat(2,1fr);gap:1.4rem}
.service-item{
  background:var(--white);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:1.6rem;transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition);
}
.service-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:transparent}
.service-item .ico{
  width:42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--navy),var(--teal));
  display:flex;align-items:center;justify-content:center;color:var(--white);font-size:1rem;margin-bottom:.9rem;
}
.service-item h4{font-size:1.02rem;font-weight:700;color:var(--navy);margin-bottom:.4rem}
.service-item p{font-size:.9rem;margin-bottom:.7rem}
.service-item ul{list-style:none;font-size:.86rem;display:grid;gap:.35rem}
.service-item ul li{display:flex;gap:.5rem;align-items:flex-start;color:var(--ink)}
.service-item ul li i{color:var(--teal);margin-top:3px;flex:none;font-size:.8rem}

/* =========================== Engineering / Technical =========================== */
.eng-section{background:var(--navy);color:var(--white);position:relative;overflow:hidden}
.eng-section::before{
  content:"";position:absolute;inset:0;opacity:.08;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:64px 64px;
}
.eng-section .section-head h2{color:var(--white)}
.eng-section .section-head p{color:rgba(255,255,255,.75)}
.eng-section .eyebrow{color:var(--teal-light)}
.eng-grid{position:relative;z-index:2;display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem}
.eng-card{
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-md);
  padding:1.8rem;backdrop-filter:blur(4px);
}
.eng-card .ico{width:46px;height:46px;border-radius:12px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;margin-bottom:1rem;color:var(--teal-light);font-size:1.15rem}
.eng-card h4{color:var(--white);font-size:1.05rem;margin-bottom:.5rem}
.eng-card p{color:rgba(255,255,255,.75);font-size:.92rem;margin-bottom:0}

.eng-note{position:relative;z-index:2;margin-top:2.4rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.15);display:grid;grid-template-columns:1fr 1fr;gap:2rem}
.eng-note h4{color:var(--white);font-size:1.05rem;margin-bottom:.5rem}
.eng-note ul{list-style:none;display:grid;gap:.5rem}
.eng-note ul li{display:flex;gap:.5rem;color:rgba(255,255,255,.82);font-size:.92rem}
.eng-note ul li i{color:var(--teal-light);margin-top:4px;flex:none}

/* =========================== Why choose us =========================== */
.why-section{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:start}
.why-intro h2{margin-bottom:1rem}
.why-list{display:grid;gap:0}
.why-row{display:grid;grid-template-columns:auto 1fr;gap:1.2rem;padding:1.5rem 0;border-bottom:1px solid var(--border)}
.why-list .why-row:first-child{padding-top:0}
.why-list .why-row:last-child{border-bottom:0}
.why-row .ico{width:46px;height:46px;border-radius:12px;background:var(--cool-gray);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--teal);font-size:1.1rem}
.why-row h4{margin-bottom:.3rem;font-size:1.05rem}
.why-row p{font-size:.92rem;margin-bottom:0}

/* =========================== Contact =========================== */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:3rem}
.contact-card{background:var(--navy);color:var(--white);border-radius:var(--radius-lg);padding:2.4rem}
.contact-card h3{color:var(--white);margin-bottom:1.4rem}
.contact-line{display:flex;align-items:flex-start;gap:.9rem;margin-bottom:1.1rem}
.contact-line i{width:34px;height:34px;border-radius:9px;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;color:var(--teal-light);flex:none}
.contact-line a{color:var(--white);text-decoration:underline;text-underline-offset:3px}
.contact-note{color:rgba(255,255,255,.8);font-size:.92rem;margin-top:1.2rem}

.contact-form{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2.2rem;box-shadow:var(--shadow-sm)}
.form-group{margin-bottom:1.1rem}
.form-group label{display:block;font-size:.88rem;font-weight:700;margin-bottom:.4rem;color:var(--navy)}
.form-group input,.form-group textarea{
  width:100%;padding:12px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);
  font-size:.95rem;font-family:inherit;transition:border-color var(--transition);
}
.form-group textarea{resize:vertical;min-height:120px}
.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--teal)}
.form-status{font-size:.85rem;margin-top:.6rem;min-height:1.2em}

/* =========================== Footer =========================== */
.site-footer{background:#081426;color:#B9C4D0;padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.4rem;margin-bottom:2.4rem}
.footer-brand h4{color:var(--white);margin-bottom:.7rem}
.footer-brand p{color:#9AA8B7;font-size:.9rem;margin-bottom:1rem}
.footer-social{display:flex;gap:.6rem}
.footer-social a{width:36px;height:36px;border-radius:50%;background:#122237;display:flex;align-items:center;justify-content:center;color:#B9C4D0;transition:background var(--transition),color var(--transition)}
.footer-social a:hover{background:var(--teal);color:var(--white)}
.site-footer h4{color:var(--white);font-size:.98rem;margin-bottom:1rem}
.site-footer ul{list-style:none;display:grid;gap:.55rem}
.site-footer a{color:#B9C4D0;text-decoration:none;font-size:.92rem}
.site-footer a:hover{color:var(--teal-light)}
.footer-bottom{border-top:1px solid #1B2C41;padding-top:1.4rem;text-align:center;font-size:.85rem;color:#7E8CA0}

/* =========================== Reveal on scroll =========================== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.is-visible{opacity:1;transform:none}

/* =========================== Responsive =========================== */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{display:none}
  .service-category{grid-template-columns:1fr}
  .service-category-label{position:static}
  .eng-grid{grid-template-columns:repeat(2,1fr)}
  .why-section{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .section{padding:72px 0}
  nav{position:fixed;top:72px;inset-inline:0;background:var(--white);border-top:1px solid var(--border);
      box-shadow:var(--shadow-md);padding:1.2rem 24px;transform:translateY(-8px);opacity:0;pointer-events:none;transition:all var(--transition);}
  nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  nav ul, html[lang="ar"] nav ul{flex-direction:column;gap:0}
  nav a{display:block;padding:.7rem 0;border-bottom:1px solid var(--border)}
  .mobile-menu-toggle{display:flex;align-items:center;justify-content:center}
  .service-list{grid-template-columns:1fr}
  .eng-grid{grid-template-columns:1fr}
  .eng-note{grid-template-columns:1fr;gap:1.4rem}
  .footer-grid{grid-template-columns:1fr;gap:2rem}

  .header-actions{gap:.6rem}
  .header-actions .btn-primary{display:none}
  .brand-tag{display:none}
  .lang-btn{padding:6px 11px}
  .mobile-menu-toggle{width:44px;height:44px}
}
@media (max-width:480px){
  .container{padding:0 18px}
  .hero{padding:calc(76px + 56px) 0 64px}
  .hero-strip{gap:1rem}
  .about-panel,.contact-form{padding:1.6rem}
}