/* Arsham Clean Energy - Premium UI (Concept 2)
   Global styles: header, hero slider, cards, forms, footer
*/
:root{
  --bg:#0b1620;               /* soft dark */
  --bg2:#0E2A3A;              /* hero petrol */
  --panel:rgba(255,255,255,.06);
  --panel2:rgba(255,255,255,.10);
  --text:#0f172a;
  --muted:#5b6576;
  --white:#ffffff;
  --offwhite:#f7f9fc;
  --line:rgba(255,255,255,.14);
  --line2:rgba(15,23,42,.10);

  --accent:#19B7C6;           /* logo turquoise */
  --accent2:#0FB9A7;

  --shadow: 0 18px 55px rgba(0,0,0,.28);
  --shadow2: 0 10px 30px rgba(15,23,42,.12);

  --radius: 18px;
  --radius2: 26px;

  --container: 1180px;
  --headerH: 76px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  color:var(--text);
  background:var(--offwhite);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

a{color:inherit; text-decoration:none}
img{max-width:100%; display:block}
button,input,select,textarea{font:inherit}

.container{
  width:min(var(--container), calc(100% - 40px));
  margin-inline:auto;
}

/* Top thin bar */
.topbar{
  background: #071019;
  color: rgba(255,255,255,.80);
  font-size: 12px;
}
.topbar__inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:10px 0;
  gap:12px;
}
.topbar__left, .topbar__right{display:flex; align-items:center; gap:12px; flex-wrap:wrap}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 10px;
  border:1px solid rgba(255,255,255,.14);
  border-radius:999px;
  background: rgba(255,255,255,.04);
}
.dot{
  width:8px;height:8px;border-radius:99px;
  background:var(--accent);
  box-shadow:0 0 0 4px rgba(25,183,198,.18);
}
.smallLink{opacity:.86}
.smallLink:hover{opacity:1}

/* Header */
.header{
  position:sticky;
  top:0;
  z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(255,255,255,.72);
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.header__inner{
  height:var(--headerH);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width: 220px;
}
.brand img{height:44px; width:auto}
.nav{
  display:flex;
  align-items:center;
  gap:18px;
}
.nav a{
  font-size:14px;
  color: rgba(15,23,42,.86);
  padding:10px 10px;
  border-radius:12px;
  transition:.2s ease;
}
.nav a:hover{
  background: rgba(25,183,198,.10);
  color: rgba(15,23,42,1);
}

.header__right{
  display:flex;
  align-items:center;
  gap:10px;
}
.lang{
  display:flex;
  align-items:center;
  gap:8px;
  padding:8px 10px;
  border-radius:14px;
  border:1px solid rgba(15,23,42,.10);
  background: rgba(255,255,255,.85);
}
.lang a{
  font-size:13px;
  letter-spacing:.02em;
  padding:6px 8px;
  border-radius:10px;
  color: rgba(15,23,42,.62);
  position:relative;
}
.lang a.is-active{
  color: rgba(15,23,42,.96);
}
.lang a.is-active::after{
  content:"";
  position:absolute;
  left:8px; right:8px; bottom:3px;
  height:2px;
  border-radius:99px;
  background: var(--accent);
}

.ctaBtn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:10px 14px;
  border-radius:14px;
  border:1px solid rgba(15,23,42,.12);
  background: rgba(15,23,42,.92);
  color: rgba(255,255,255,.95);
  font-size:14px;
  transition:.2s ease;
}
.ctaBtn:hover{transform: translateY(-1px); box-shadow: var(--shadow2)}
.ctaBtn--light{
  background: rgba(255,255,255,.92);
  color: rgba(15,23,42,.92);
}

/* Mobile burger */
.burger{
  display:none;
  width:44px;height:44px;
  border-radius:14px;
  border:1px solid rgba(15,23,42,.12);
  background: rgba(255,255,255,.92);
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.burger span{
  width:18px;height:2px;background:rgba(15,23,42,.85);
  position:relative; display:block; border-radius:99px;
}
.burger span::before,.burger span::after{
  content:""; position:absolute; left:0; width:18px;height:2px;
  background:rgba(15,23,42,.85); border-radius:99px;
}
.burger span::before{top:-6px}
.burger span::after{top:6px}

/* Mobile overlay menu */
.overlay{
  position:fixed;
  inset:0;
  background: rgba(5, 10, 16, .72);
  backdrop-filter: blur(10px);
  display:none;
  z-index:80;
}
.overlay.is-open{display:block}
.drawer{
  position:absolute;
  inset:0;
  background: rgba(255,255,255,.92);
  transform: translateX(100%);
  transition: transform .25s ease;
}
.overlay.is-open .drawer{transform: translateX(0)}
.drawer__top{
  height:var(--headerH);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 20px;
  border-bottom: 1px solid rgba(15,23,42,.08);
}
.drawer__content{
  padding:18px 20px 26px;
  display:flex;
  flex-direction:column;
  gap:10px;
}
.drawer__content a{
  padding:14px 14px;
  border-radius:16px;
  border:1px solid rgba(15,23,42,.08);
  background: rgba(255,255,255,.88);
  color: rgba(15,23,42,.90);
}
.drawer__content a:hover{border-color: rgba(25,183,198,.35)}
.drawer__langs{
  display:flex;
  gap:10px;
  margin-bottom:8px;
}
.drawer__langs a{
  flex:1;
  text-align:center;
  font-weight:600;
  letter-spacing:.03em;
}
.closeBtn{
  width:44px;height:44px;border-radius:14px;
  border:1px solid rgba(15,23,42,.12);
  background: rgba(255,255,255,.92);
  cursor:pointer;
  display:grid; place-items:center;
}
.closeBtn:before, .closeBtn:after{
  content:""; width:18px;height:2px;background:rgba(15,23,42,.86);
  position:absolute; border-radius:99px;
}
.closeBtn{position:relative}
.closeBtn:before{transform: rotate(45deg)}
.closeBtn:after{transform: rotate(-45deg)}

/* Hero slider */
.hero{
  position:relative;
  min-height: calc(78vh - var(--headerH));
  background: radial-gradient(1200px 600px at 18% 22%, rgba(25,183,198,.20), transparent 60%),
              radial-gradient(900px 500px at 70% 40%, rgba(15,185,167,.16), transparent 55%),
              linear-gradient(180deg, rgba(14,42,58,1), rgba(10,26,38,1));
  color: rgba(255,255,255,.95);
  overflow:hidden;
}
.hero__slides{
  position:absolute; inset:0;
}
.slide{
  position:absolute; inset:0;
  background-size:cover;
  background-position:center;
  opacity:0;
  transform: scale(1.03);
  transition: opacity .8s ease, transform 2.6s ease;
  filter: saturate(1.05) contrast(1.02);
}
.slide.is-active{
  opacity:1;
  transform: scale(1.00);
}
.hero__overlay{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(7,16,25,.78) 0%, rgba(7,16,25,.55) 45%, rgba(7,16,25,.40) 100%),
    radial-gradient(900px 500px at 20% 35%, rgba(25,183,198,.18), transparent 60%),
    radial-gradient(900px 500px at 70% 55%, rgba(15,185,167,.12), transparent 62%);
}
.hero__inner{
  position:relative;
  padding: clamp(38px, 5.5vw, 70px) 0;
  min-height: calc(78vh - var(--headerH));
  display:grid;
  align-content:center;
}
.hero__content{
  width:min(720px, 100%);
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:8px 12px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.88);
  font-size:13px;
  letter-spacing:.04em;
  text-transform:uppercase;
}
.kicker .pulse{
  width:8px;height:8px;border-radius:99px;background:var(--accent);
  box-shadow:0 0 0 5px rgba(25,183,198,.18);
}
.hero h1{
  margin:14px 0 10px;
  font-size: clamp(34px, 4.6vw, 56px);
  line-height:1.05;
  letter-spacing:-.02em;
}
.hero p{
  margin:0 0 22px;
  color: rgba(255,255,255,.82);
  font-size: clamp(15px, 1.4vw, 18px);
}
.hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:16px;
  border:1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.10);
  color: rgba(255,255,255,.95);
  transition:.2s ease;
}
.btn:hover{transform: translateY(-1px); box-shadow: var(--shadow)}
.btn--solid{
  background: linear-gradient(135deg, rgba(25,183,198,1), rgba(15,185,167,1));
  border-color: rgba(255,255,255,.0);
  color: rgba(8,14,20,.94);
  font-weight:700;
}
.btn--ghost{background: rgba(255,255,255,.06)}
.hero__meta{
  margin-top:28px;
  display:flex;
  gap:14px;
  flex-wrap:wrap;
}
.metaCard{
  padding:12px 14px;
  border-radius:18px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  min-width: 210px;
}
.metaCard b{display:block; font-size:14px}
.metaCard span{display:block; font-size:13px; opacity:.82}

/* Slider controls */
.hero__controls{
  position:absolute;
  left:0; right:0; bottom:18px;
}
.controlsRow{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
}
.pager{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color: rgba(255,255,255,.80);
}
.pills{
  display:flex;
  gap:8px;
}
.pill{
  width:34px;height:6px;border-radius:999px;
  background: rgba(255,255,255,.20);
  overflow:hidden;
}
.pill > i{
  display:block;height:100%;width:0%;
  background: linear-gradient(90deg, rgba(25,183,198,1), rgba(15,185,167,1));
}
.scrollHint{
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  opacity:.75;
  display:flex; align-items:center; gap:10px;
}
.scrollHint .mouse{
  width:20px;height:30px;border:1px solid rgba(255,255,255,.25);
  border-radius:999px; position:relative;
}
.scrollHint .mouse::after{
  content:""; position:absolute; left:50%; top:7px;
  width:3px;height:3px;border-radius:99px;
  background: rgba(255,255,255,.70);
  transform: translateX(-50%);
  animation: wheel 1.6s infinite;
}
@keyframes wheel{
  0%{opacity:.1; transform: translate(-50%,0)}
  50%{opacity:1}
  100%{opacity:.1; transform: translate(-50%,10px)}
}

/* Sections */
.section{padding:70px 0}
.section--muted{background: #F4F7FA}
.section__head{
  display:flex; justify-content:space-between; align-items:flex-end; gap:18px;
  margin-bottom:20px;
}
.section__head h2{
  margin:0;
  font-size: clamp(22px, 2.6vw, 34px);
  letter-spacing:-.02em;
}
.section__head p{margin:0; color: var(--muted); max-width:620px}

.grid{
  display:grid;
  gap:16px;
}
.grid-3{grid-template-columns: repeat(3, 1fr)}
.grid-2{grid-template-columns: repeat(2, 1fr)}
.card{
  background: white;
  border: 1px solid rgba(15,23,42,.10);
  border-radius: var(--radius);
  padding:18px;
  box-shadow: var(--shadow2);
}
.card--soft{
  background: rgba(255,255,255,.70);
  box-shadow: none;
}
.card:hover{
  transform: translateY(-2px);
  transition: .2s ease;
}
.card__icon{
  width:44px;height:44px;border-radius:16px;
  background: rgba(25,183,198,.12);
  border: 1px solid rgba(25,183,198,.22);
  display:grid; place-items:center;
  color: rgba(15,23,42,.90);
  margin-bottom:10px;
}
.card h3{margin:0 0 6px; font-size:17px}
.card p{margin:0; color: var(--muted); font-size:14px}
.tag{
  display:inline-flex;
  margin-top:12px;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(15,23,42,.10);
  color: rgba(15,23,42,.76);
  font-size:12px;
}

.twoCol{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap:16px;
  align-items:start;
}
.factList{
  display:grid;
  gap:10px;
}
.fact{
  border:1px solid rgba(15,23,42,.10);
  border-radius: var(--radius);
  padding:14px;
  background: rgba(255,255,255,.82);
}
.fact b{display:block}
.fact span{color: var(--muted); font-size:14px}

/* CTA band */
.ctaBand{
  border-radius: var(--radius2);
  background: radial-gradient(1100px 450px at 18% 20%, rgba(25,183,198,.18), transparent 55%),
              radial-gradient(900px 450px at 72% 70%, rgba(15,185,167,.14), transparent 60%),
              linear-gradient(180deg, rgba(14,42,58,1), rgba(7,16,25,1));
  color: rgba(255,255,255,.95);
  padding: 26px;
  border:1px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow);
}
.ctaBand h3{margin:0 0 6px; font-size:22px}
.ctaBand p{margin:0 0 14px; opacity:.82}
.ctaBand .btn{border-color: rgba(255,255,255,.18)}

/* Forms */
.formGrid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:12px;
}
.field{
  display:flex;
  flex-direction:column;
  gap:8px;
}
label{font-size:13px; color: rgba(15,23,42,.78)}
input,textarea,select{
  border-radius:16px;
  border:1px solid rgba(15,23,42,.12);
  background: rgba(255,255,255,.92);
  padding:12px 12px;
  outline:none;
}
textarea{min-height:120px; resize:vertical}
.help{
  font-size:12px;
  color: rgba(15,23,42,.58);
}
.formActions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-top:10px;
}

/* Footer */
.footer{
  background: #071019;
  color: rgba(255,255,255,.84);
  padding:46px 0;
  margin-top: 60px;
}
.footer__grid{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap:16px;
}
.footer h4{margin:0 0 10px; color: rgba(255,255,255,.96)}
.footer p{margin:0; color: rgba(255,255,255,.70)}
.footer a{color: rgba(255,255,255,.86)}
.footer a:hover{color: rgba(255,255,255,1)}
.footer .brand img{height:42px}
.copy{
  margin-top:18px;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.12);
  font-size:12px;
  color: rgba(255,255,255,.62);
}

/* Toast */
.toast{
  position: fixed;
  left:50%;
  bottom:18px;
  transform: translateX(-50%);
  background: rgba(15,23,42,.92);
  color: rgba(255,255,255,.92);
  padding:12px 14px;
  border-radius: 14px;
  border:1px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow);
  opacity:0;
  pointer-events:none;
  transition:.2s ease;
  z-index:120;
}
.toast.is-show{opacity:1}

/* Responsive */
@media (max-width: 980px){
  .nav{display:none}
  .burger{display:flex}
  .brand{min-width:auto}
  .grid-3{grid-template-columns: 1fr}
  .grid-2{grid-template-columns: 1fr}
  .twoCol{grid-template-columns: 1fr}
  .formGrid{grid-template-columns: 1fr}
  .footer__grid{grid-template-columns: 1fr}
}