:root{
  --bg:#0b1220;
  --bg2:#0f172a;
  --card:#ffffff;
  --text:#0b1220;
  --muted:#6b7280;
  --line:#e5e7eb;
  --accent:#1b7f5a;
  --accent2:#0f766e;
  --accent3:#1f4e79;
  --radius:18px;
  --shadow:0 14px 30px rgba(0,0,0,.10);
  --container:1100px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:#fff;
  line-height:1.5;
}

img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
code{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}

.container{width:min(var(--container), calc(100% - 2.2rem)); margin:0 auto}

.skip-link{
  position:absolute; left:-999px; top:10px;
  background:#fff; padding:.6rem .9rem; border-radius:10px; border:1px solid var(--line);
}
.skip-link:focus{left:10px; z-index:1000}

/* Header */
.site-header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(180%) blur(10px);
  background:rgba(255,255,255,.82);
  border-bottom:1px solid rgba(229,231,235,.8);
}
.header-inner{display:flex; align-items:center; justify-content:space-between; gap:1rem; padding:.85rem 0}

.brand{display:flex; align-items:center; gap:.65rem; font-weight:800}
.brand-mark{
  width:34px; height:34px; border-radius:10px;
  display:grid; place-items:center;
  background:linear-gradient(135deg, var(--accent), var(--accent2));
  color:#fff; font-weight:900;
  box-shadow:0 10px 20px rgba(27,127,90,.22);
}
.brand-name{letter-spacing:.3px}
.brand-footer .brand-mark{width:30px; height:30px; border-radius:10px}

.nav{display:flex; align-items:center; gap:1.1rem}
.nav a{font-weight:600; color:#0f172a; opacity:.88}
.nav a:hover{opacity:1}
.nav a.active{opacity:1; position:relative}
.nav a.active::after{
  content:""; position:absolute; left:0; right:0; bottom:-10px; height:2px;
  background:linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius:2px;
}

.nav-toggle{display:none; width:42px; height:38px; border-radius:12px; border:1px solid var(--line); background:#fff}
.nav-toggle span{display:block; width:18px; height:2px; background:#0f172a; margin:4px auto; border-radius:2px}

/* Buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:.82rem 1.05rem; border-radius:14px;
  background:linear-gradient(135deg, var(--accent), var(--accent2));
  color:#fff; font-weight:750;
  box-shadow:0 14px 30px rgba(15,118,110,.20);
  border:1px solid rgba(0,0,0,0);
  transition:transform .08s ease, box-shadow .2s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-sm{padding:.55rem .75rem; border-radius:12px; font-size:.92rem}
.btn-ghost{
  background:#fff; color:#0f172a;
  border:1px solid var(--line);
  box-shadow:none;
}
.btn-ghost:hover{box-shadow:0 10px 20px rgba(0,0,0,.06)}

/* Hero */
.hero{position:relative; min-height:74vh; display:grid; align-items:end; overflow:hidden}
.hero-media{
  position:absolute; inset:0;
  background-size:cover; background-position:center;
  transform:scale(1.02);
}
.hero-overlay{
  position:absolute; inset:0;
  background:linear-gradient(180deg, rgba(10,15,25,.55), rgba(10,15,25,.88));
}
.hero-content{position:relative; padding:5.0rem 0 2.2rem 0; color:#fff}
.eyebrow{letter-spacing:.12em; text-transform:uppercase; font-size:.8rem; color:rgba(255,255,255,.78)}
.hero h1{margin:.7rem 0 0 0; font-size:clamp(2.1rem, 4vw, 3.4rem); line-height:1.05}
.lead{max-width:60ch; font-size:1.12rem; color:rgba(255,255,255,.86)}
.hero-cta{display:flex; gap:.8rem; flex-wrap:wrap; margin-top:1.4rem}
.hero-kpis{display:grid; grid-template-columns:repeat(4, minmax(0,1fr)); gap:.8rem; margin-top:2.1rem}
.kpi{background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.16); border-radius:16px; padding:1rem}
.kpi-value{font-weight:900; font-size:1.25rem}
.kpi-label{color:rgba(255,255,255,.78); font-size:.92rem}

/* Page hero */
.page-hero{padding:3.8rem 0 1.5rem 0; background:linear-gradient(180deg, #f8fafc, #ffffff)}
.page-hero h1{margin:.7rem 0 0 0; font-size:clamp(2.0rem, 3.2vw, 3.0rem); line-height:1.1}
.page-hero .lead{color:#334155; max-width:72ch}

/* Sections */
.section{padding:3.2rem 0}
.section-alt{background:#f8fafc; border-top:1px solid rgba(229,231,235,.7); border-bottom:1px solid rgba(229,231,235,.7)}
.section-head{margin-bottom:1.6rem}
.section-head h2{margin:0; font-size:1.75rem}
.section-head p{margin:.4rem 0 0 0; color:#475569; max-width:75ch}

/* Grid */
.grid{display:grid; gap:1.2rem}
.grid-1{grid-template-columns:1fr}
.grid-2{grid-template-columns:repeat(2, minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3, minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4, minmax(0,1fr))}

/* Cards */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:var(--shadow);
}
.card img{width:100%; height:170px; object-fit:cover}
.card-body{padding:1.05rem}
.card-body h3{margin:0; font-size:1.08rem}
.card-body p{margin:.45rem 0 0 0; color:#475569}

.panel{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:1.2rem;
  box-shadow:var(--shadow);
}
.rounded{border-radius:16px; border:1px solid rgba(229,231,235,.9)}

.muted{color:var(--muted)}
.small{font-size:.92rem}

.checklist{padding-left:1.1rem}
.checklist li{margin:.6rem 0; padding-left:.25rem}

.inline-cta{display:flex; gap:.8rem; flex-wrap:wrap; margin-top:1.1rem}

/* Stats */
.stat{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:1.1rem; box-shadow:var(--shadow)}
.stat-value{font-weight:900; font-size:1.4rem; color:#0f172a}
.stat-label{color:#475569; margin-top:.25rem}

.steps{margin:.6rem 0 0 1.1rem}
.steps li{margin:.55rem 0; color:#334155}

.download-card{
  display:flex; gap:1rem; align-items:center;
  padding:1.05rem;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.download-card:hover{transform:translateY(-1px); transition:transform .08s ease}
.download-icon{
  width:46px; height:46px; border-radius:16px;
  display:grid; place-items:center;
  background:linear-gradient(135deg, var(--accent3), var(--accent2));
  color:#fff; font-weight:900;
}
.download-title{font-weight:800}

.pill-row{display:flex; flex-wrap:wrap; gap:.55rem; margin:.7rem 0 1.1rem 0}
.pill{display:inline-flex; padding:.35rem .7rem; border-radius:999px; border:1px solid var(--line); background:#fff; font-weight:700; color:#0f172a; font-size:.92rem}

/* Forms */
.form{display:grid; gap:1rem}
.form-row{display:grid; gap:.35rem}
label{font-weight:700; color:#0f172a}
input,select,textarea{
  padding:.8rem .85rem;
  border-radius:14px;
  border:1px solid var(--line);
  font:inherit;
  background:#fff;
}
textarea{resize:vertical}

.note{border:1px solid var(--line); border-radius:var(--radius); padding:1rem; background:#f8fafc}

/* Model viewer */
.model-viewer-shell{
  position:relative;
  height:420px;
  border-radius:var(--radius);
  border:1px dashed #cbd5e1;
  background:linear-gradient(180deg,#ffffff,#f8fafc);
  overflow:hidden;
}
.model-viewer-fallback{position:absolute; inset:0; display:grid; place-items:center; padding:1rem; text-align:center}

/* Footer */
.site-footer{padding:2.2rem 0; background:#0b1220; color:#e5e7eb}
.footer-inner{display:grid; grid-template-columns:2fr 1fr 1fr; gap:1.2rem; align-items:start}
.footer-links{display:grid; gap:.55rem}
.footer-links a{opacity:.88}
.footer-links a:hover{opacity:1}

/* Toast */
.toast{
  position:fixed; left:50%; bottom:18px; transform:translateX(-50%);
  background:#0f172a; color:#fff;
  padding:.75rem 1rem; border-radius:14px;
  box-shadow:0 16px 40px rgba(0,0,0,.25);
  border:1px solid rgba(255,255,255,.12);
  max-width:min(520px, calc(100% - 2rem));
  opacity:0; pointer-events:none;
  transition:opacity .18s ease, transform .18s ease;
}
.toast.show{opacity:1; pointer-events:auto; transform:translateX(-50%) translateY(-4px)}

/* Responsive */
@media (max-width: 980px){
  .grid-4{grid-template-columns:repeat(2, minmax(0,1fr))}
  .footer-inner{grid-template-columns:1fr}
  .hero-kpis{grid-template-columns:repeat(2, minmax(0,1fr))}
}

@media (max-width: 720px){
  .nav-toggle{display:inline-grid; place-items:center}
  .nav{
    position:fixed; left:0; right:0; top:64px;
    background:rgba(255,255,255,.96);
    border-bottom:1px solid rgba(229,231,235,.9);
    padding:1rem;
    display:none;
    flex-direction:column; align-items:flex-start;
  }
  .nav.open{display:flex}
  .grid-2,.grid-3{grid-template-columns:1fr}
  .hero{min-height:78vh}
}


/* Language switch */
.lang-switch{display:flex;gap:8px;align-items:center;margin-left:12px}
.lang-btn{border:1px solid #cfd8dc;background:#fff;border-radius:10px;padding:6px 10px;font-weight:600;cursor:pointer}
.lang-btn.active{background:#0b5fff;color:#fff;border-color:#0b5fff}


/* RTL support (Arabic) */
body.rtl { direction: rtl; }
body.rtl .nav-links { direction: rtl; }
body.rtl .nav-links a { margin-left: 0; margin-right: 18px; }
body.rtl .lang-switch { margin-left: 0; margin-right: auto; }
body.rtl .hero, body.rtl .section, body.rtl .container { text-align: right; }

.link-card { text-decoration: none; color: inherit; display: block; }
.link-card:hover { transform: translateY(-2px); }