:root{
  --bg:#FFFFFF;
  --surface:#F7F8FA;
  --fg:#151B26;
  --muted:#6B7280;
  --border:#E5E7EB;
  --primary:#0D2C4F;
  --accent:#2B88CA;
  --grad:linear-gradient(90deg,#0D2C4F,#2B88CA);
  --ease:cubic-bezier(.22,1,.36,1);
  --wrap:1120px;
}

*,*::before,*::after{box-sizing:border-box}

html{scroll-behavior:smooth}

body{
  margin:0;
  background:var(--bg);
  color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

html[lang="fa"] body{
  font-family:"Vazirmatn",Tahoma,"Segoe UI",sans-serif;
  line-height:1.85;
}

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

a{color:inherit;text-decoration:none}

h1,h2,h3{margin:0;font-weight:600;letter-spacing:-.03em;line-height:1.15}
h2{font-size:32px}
h3{font-size:19px;letter-spacing:-.01em;line-height:1.35}
p{margin:0}

.eyebrow{
  font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);font-weight:500;
}
html[lang="fa"] .eyebrow{letter-spacing:0;font-size:12px}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid transparent;transition:border-color .2s ease;
}
.topbar.scrolled{border-bottom-color:var(--border)}

.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}

.brand{display:flex;align-items:baseline;gap:8px}
.brand-mark{font-size:15px;font-weight:600;letter-spacing:.18em;color:var(--fg)}
.brand-sub{font-size:10px;letter-spacing:.2em;color:var(--muted)}

.nav{display:flex;gap:28px}
.nav a{font-size:15px;color:var(--muted);transition:color .16s ease}
.nav a:hover{color:var(--fg)}

.topbar-right{display:flex;align-items:center;gap:14px}

.lang{
  border:0;background:none;padding:6px 2px;cursor:pointer;font:inherit;
  font-size:14px;color:var(--muted);display:flex;gap:4px;align-items:center;
}
.lang span{padding-bottom:2px;border-bottom:1px solid transparent}
html[lang="en"] .lang-en{border-bottom-color:var(--fg);color:var(--fg)}
html[lang="fa"] .lang-fa{border-bottom-color:var(--fg);color:var(--fg)}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer}
.burger span{display:block;width:20px;height:1.5px;background:var(--fg)}

/* ---------- hero ---------- */
.hero{display:flex;align-items:center;min-height:calc(100vh - 72px);padding:72px 0}
.hero-inner{width:100%}

.hero h1{
  font-size:clamp(40px,5.6vw,64px);
  line-height:1.05;letter-spacing:-.03em;
  max-width:16ch;margin:20px 0 0;
}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

.lede{max-width:560px;margin-top:24px;font-size:18px;color:#4A5262}

.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:500;padding:14px 24px;cursor:pointer;
  transition:background-color .16s ease,border-color .16s ease,color .16s ease;
  border:1px solid transparent;font-family:inherit;
}
.btn-primary{background:var(--primary);color:#fff;position:relative}
.btn-primary:hover{background:#123A66}
.btn-ghost{border-color:var(--border);color:var(--fg)}
.btn-ghost:hover{border-color:#C9CED6}

.notch::after{
  content:"";position:absolute;inset:4px;pointer-events:none;opacity:.55;
  background:
    linear-gradient(#fff,#fff) left top/10px 1px no-repeat,
    linear-gradient(#fff,#fff) left top/1px 10px no-repeat,
    linear-gradient(#fff,#fff) right top/10px 1px no-repeat,
    linear-gradient(#fff,#fff) right top/1px 10px no-repeat,
    linear-gradient(#fff,#fff) left bottom/10px 1px no-repeat,
    linear-gradient(#fff,#fff) left bottom/1px 10px no-repeat,
    linear-gradient(#fff,#fff) right bottom/10px 1px no-repeat,
    linear-gradient(#fff,#fff) right bottom/1px 10px no-repeat;
}

.hero-note{margin-top:28px;font-size:13px;color:var(--muted)}

/* ---------- sections ---------- */
.section{padding:96px 0;border-top:1px solid var(--border)}
.section-alt{background:var(--surface)}
.section-head{max-width:620px;margin-bottom:56px}
.section-head h2{margin-top:16px}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.card{padding-inline:32px;border-inline-start:1px solid var(--border)}
.card:first-child{padding-inline-start:0;border-inline-start:0}
.card:last-child{padding-inline-end:0}
.card svg{width:26px;height:26px;color:var(--primary);margin-bottom:22px}
.card-label{font-size:11px;letter-spacing:.14em;color:var(--muted);margin-bottom:10px}
html[lang="fa"] .card-label{letter-spacing:0;font-size:12px}
.card h3{margin-bottom:10px}
.card p{color:#4A5262;font-size:15px}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.step{padding-inline:32px;border-inline-start:1px solid var(--border)}
.step:first-child{padding-inline-start:0;border-inline-start:0}
.step:last-child{padding-inline-end:0}
.step-num{display:block;font-size:12px;color:var(--accent);letter-spacing:.1em;margin-bottom:14px}
.step h3{margin-bottom:8px}
.step p{color:#4A5262;font-size:15px}

/* ---------- stats ---------- */
.stats{border-top:1px solid var(--border);padding:40px 0}
.stats-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat strong{display:block;font-size:22px;font-weight:600;letter-spacing:-.02em}
.stat span{font-size:13px;color:var(--muted)}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:start}
.contact-copy h2{margin:16px 0 18px;max-width:14ch}
.lede-sm{color:#4A5262;max-width:400px}
.contact-mail{margin-top:28px;font-size:19px;font-weight:500}
.contact-mail a{border-bottom:1px solid var(--border);padding-bottom:2px}
.contact-mail a:hover{border-bottom-color:var(--primary)}
.muted{color:var(--muted);font-size:13px;margin-top:8px}

.form{display:flex;flex-direction:column;gap:6px}
.form label{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-top:14px}
.form input,.form textarea{
  font:inherit;font-size:15px;color:var(--fg);background:var(--bg);
  border:1px solid var(--border);border-radius:0;padding:12px 14px;width:100%;
  transition:border-color .16s ease;
}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--primary)}
.form .btn{margin-top:20px;align-self:flex-start}
.form-ok{font-size:14px;color:#0F7A4E;margin-top:14px}
.form-err{font-size:14px;color:#B42318;margin-top:14px}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);padding:28px 0}
.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.footer p{font-size:13px;color:var(--muted)}
.footer-links{display:flex;gap:20px}
.footer-links button{background:none;border:0;padding:0;font:inherit;font-size:13px;color:var(--muted);cursor:pointer}
.footer-links button:hover{color:var(--fg)}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;z-index:100;background:rgba(21,27,38,.38);display:flex;align-items:center;justify-content:center;padding:24px}
.modal[hidden]{display:none}
.modal-box{background:#fff;max-width:540px;width:100%;padding:40px;position:relative;max-height:80vh;overflow:auto}
.modal-box h2{font-size:22px;margin-bottom:16px}
.modal-box p{color:#4A5262;font-size:15px;margin-bottom:14px}
.modal-close{position:absolute;top:14px;inset-inline-end:16px;background:none;border:0;font-size:24px;line-height:1;color:var(--muted);cursor:pointer}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- focus ---------- */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;
}

/* ---------- inner pages ---------- */
.page-hero{padding:96px 0 56px}
.page-hero h1{font-size:clamp(36px,4.6vw,56px);margin-top:16px;max-width:22ch}
.page-hero .lede{margin-top:20px;max-width:60ch}

.prose{max-width:720px}
.prose h2{margin-bottom:20px}
.prose p{color:#4A5262;margin-bottom:18px}

.split{display:grid;grid-template-columns:1fr 1fr;gap:48px}
.case h3{margin:10px 0 10px;font-size:22px}
.case p:not(.tag){color:#4A5262;font-size:15px}
.tag{font-size:11px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase}
html[lang="fa"] .tag{letter-spacing:0;font-size:12px}
.more{margin-top:40px}
.link-arrow{font-size:15px;color:var(--primary);border-bottom:1px solid var(--border);padding-bottom:2px}
.link-arrow::after{content:" →"}
html[dir="rtl"] .link-arrow::after{content:" ←"}

.note-link{display:block}
.note-link h3{margin:10px 0 8px;font-size:20px}
.note-link p{color:#4A5262;font-size:15px}
.note-link:hover h3{color:var(--primary)}
.note-date{font-size:12px;color:var(--muted)}

.article{max-width:720px;padding:40px 0;border-bottom:1px solid var(--border)}
.article:first-child{padding-top:0}
.article:last-child{border-bottom:0}
.article h2{font-size:26px;margin:10px 0 18px}
.article p{color:#4A5262;margin-bottom:16px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.value h3{font-size:18px;margin-bottom:8px}
.value p{color:#4A5262;font-size:15px}

.timeline{border-inline-start:1px solid var(--border);padding-inline-start:28px;max-width:720px}
.tl-item{position:relative;padding-bottom:28px}
.tl-item::before{content:"";position:absolute;inset-inline-start:-33px;top:8px;width:9px;height:9px;background:#fff;border:1px solid var(--primary);border-radius:50%}
.tl-year{font-size:13px;color:var(--primary);font-weight:600;letter-spacing:.04em}
.tl-item p{color:#4A5262;font-size:15px;margin-top:6px}

.cta-band{display:flex;align-items:center;justify-content:space-between;gap:40px}
.cta-band h2{max-width:18ch}
.cta-band p{color:#4A5262;margin-top:14px;max-width:52ch}

.case-row{display:grid;grid-template-columns:280px 1fr;gap:48px;padding:40px 0;border-top:1px solid var(--border)}
.case-row:first-child{border-top:0;padding-top:0}
.case-meta h2{font-size:26px;margin-top:10px}
.case-body p{color:#4A5262;font-size:15px;margin-bottom:12px}
.case-label{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg);display:inline-block;min-width:72px}

.faq{margin-top:40px}
.faq-title{font-size:20px;margin-bottom:16px}
.faq-item{border-top:1px solid var(--border);padding:14px 0}
.faq-item summary{cursor:pointer;font-weight:500;font-size:15px;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";float:inline-end;color:var(--muted)}
.faq-item[open] summary::after{content:"–"}
.faq-item p{color:#4A5262;font-size:15px;margin-top:10px}

.form-title{font-size:20px;margin-bottom:16px}
.spaced{margin-top:14px}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .nav{
    display:none;position:absolute;top:72px;inset-inline:0;background:#fff;
    border-bottom:1px solid var(--border);flex-direction:column;gap:0;padding:8px 24px 20px;
  }
  .nav.open{display:flex}
  .nav a{padding:12px 0;border-bottom:1px solid var(--border);font-size:16px}
  .burger{display:flex}
  .cards,.steps{grid-template-columns:1fr;gap:32px}
  .card,.step{padding:0;border:0}
  html[dir="rtl"] .card,html[dir="rtl"] .step{border:0}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .stats-inner{grid-template-columns:repeat(2,1fr);gap:28px}
  .split,.grid-2,.case-row{grid-template-columns:1fr;gap:28px}
  .cta-band{flex-direction:column;align-items:flex-start;gap:24px}
  .page-hero{padding:56px 0 40px}
  .hero{padding:56px 0 72px;min-height:0}
  .hero h1{max-width:20ch}
  .section{padding:64px 0}
  .section-head{margin-bottom:36px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn,.topbar,.form input,.form textarea{transition:none}
}