:root {
  --bg: #0a0c10;
  --bg-soft: #0f1319;
  --surface: rgba(255,255,255,.055);
  --surface-strong: rgba(255,255,255,.085);
  --line: rgba(255,255,255,.11);
  --text: #f4f7fb;
  --muted: #9ba6b6;
  --accent: #7aa2ff;
  --accent-2: #8fe3ff;
  --accent-deep: #4f78dc;
  --success: #9ee7c8;
  --shadow: 0 28px 80px rgba(0,0,0,.34);
  --radius: 26px;
  --radius-sm: 18px;
  --container: 1200px;
  --header-h: 82px;
}

html[data-theme="light"] {
  --bg: #f4f7fb;
  --bg-soft: #ffffff;
  --surface: rgba(12,20,34,.04);
  --surface-strong: rgba(12,20,34,.07);
  --line: rgba(12,20,34,.10);
  --text: #111722;
  --muted: #5c6878;
  --shadow: 0 28px 80px rgba(32,47,68,.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(900px 700px at 90% -10%, rgba(122,162,255,.14), transparent 60%),
    radial-gradient(800px 600px at -10% 25%, rgba(143,227,255,.06), transparent 60%),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
}

html[lang="fa"] body {
  font-family: Vazirmatn, Tahoma, Arial, sans-serif;
  direction: rtl;
}

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

::selection { background: rgba(122,162,255,.35); }

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

.skip-link {
  position: fixed;
  inset-inline-start: 16px;
  top: -60px;
  z-index: 3000;
  background: var(--text);
  color: var(--bg);
  padding: 10px 14px;
  border-radius: 10px;
}
.skip-link:focus { top: 14px; }

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: color-mix(in srgb, var(--bg) 74%, transparent);
  border-bottom: 1px solid transparent;
  transition: .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }

.navbar {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: #192025;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0,0,0,.18);
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.brand-copy { display: grid; line-height: 1.1; }
.brand-copy strong { font-size: 14px; letter-spacing: .03em; }
.brand-copy span { color: var(--muted); font-size: 11px; margin-top: 4px; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 13px;
  color: var(--muted);
}
.nav-links a { transition: .2s ease; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  bottom: -10px;
  height: 1px;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: .2s ease;
}
.nav-links a.active::after, .nav-links a:hover::after { transform: scaleX(1); }

.nav-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn, .lang-switch, .menu-btn {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  border-radius: 12px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: .2s ease;
  cursor: pointer;
}
.icon-btn, .menu-btn { width: 40px; }
.lang-switch { padding: 0 13px; font-weight: 700; font-size: 12px; letter-spacing: .08em; }
.icon-btn:hover, .lang-switch:hover, .menu-btn:hover { background: var(--surface-strong); transform: translateY(-1px); }
.menu-btn { display: none; }

main { position: relative; }
.hero {
  min-height: 100vh;
  padding: calc(var(--header-h) + 70px) 0 84px;
  display: grid;
  align-items: center;
  position: relative;
}
.hero::before {
  content: "";
  position: absolute;
  width: 520px;
  height: 520px;
  border: 1px solid rgba(122,162,255,.12);
  border-radius: 50%;
  right: -160px;
  top: 120px;
  box-shadow: 0 0 0 90px rgba(122,162,255,.02), 0 0 0 180px rgba(143,227,255,.012);
  pointer-events: none;
}
html[lang="fa"] .hero::before { right: auto; left: -160px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, .88fr);
  gap: 64px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent-2);
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: .12em;
  font-size: 12px;
  margin-bottom: 22px;
}
.eyebrow::before { content: ""; width: 34px; height: 1px; background: currentColor; }
html[lang="fa"] .eyebrow { letter-spacing: 0; text-transform: none; }

.hero h1 {
  margin: 0;
  font-size: clamp(50px, 7.4vw, 102px);
  line-height: .92;
  letter-spacing: -.065em;
  max-width: 850px;
}
html[lang="fa"] .hero h1 { letter-spacing: -.035em; line-height: 1.05; }
.hero h1 .soft { color: var(--muted); font-weight: 500; }

.hero-lead {
  margin: 30px 0 0;
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(16px, 1.8vw, 20px);
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.pill {
  border: 1px solid var(--line);
  background: var(--surface);
  color: color-mix(in srgb, var(--text) 86%, var(--muted));
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 12px;
  backdrop-filter: blur(12px);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  font-weight: 700;
  font-size: 13px;
  transition: .22s ease;
}
.btn.primary {
  color: #08111f;
  border-color: transparent;
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 12px 40px rgba(122,162,255,.2);
}
.btn.secondary { background: var(--surface); }
.btn:hover { transform: translateY(-2px); }

.hero-portrait-wrap {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-portrait-card {
  width: min(100%, 490px);
  aspect-ratio: 3 / 4;
  border-radius: 34px;
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  position: relative;
  background: var(--bg-soft);
  isolation: isolate;
}
.hero-portrait-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(6,10,16,.42), transparent 42%);
  z-index: 2;
  pointer-events: none;
}
.hero-portrait-card img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.floating-note {
  position: absolute;
  z-index: 4;
  bottom: 44px;
  left: -28px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg-soft) 82%, transparent);
  backdrop-filter: blur(20px);
  border-radius: 18px;
  padding: 15px 18px;
  box-shadow: var(--shadow);
  min-width: 210px;
}
html[lang="fa"] .floating-note { left: auto; right: -28px; }
.floating-note small { display: block; color: var(--muted); font-size: 11px; margin-bottom: 4px; }
.floating-note strong { font-size: 14px; }

.stats {
  padding: 14px 0 100px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}
.stat { padding: 28px; min-height: 150px; }
.stat + .stat { border-inline-start: 1px solid var(--line); }
.stat strong {
  display: block;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1;
  letter-spacing: -.04em;
  margin-bottom: 14px;
}
.stat span { color: var(--muted); font-size: 13px; max-width: 170px; display: block; }

.section { padding: 110px 0; position: relative; }
.section.alt {
  background:
    linear-gradient(180deg, transparent, rgba(122,162,255,.02) 20%, transparent 88%);
}
.section-head {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: 60px;
  align-items: end;
  margin-bottom: 56px;
}
.kicker { color: var(--accent-2); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
html[lang="fa"] .kicker { text-transform: none; letter-spacing: 0; }
.section h2 {
  margin: 8px 0 0;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -.045em;
}
html[lang="fa"] .section h2 { letter-spacing: -.025em; line-height: 1.15; }
.section-intro { color: var(--muted); font-size: 17px; max-width: 720px; margin: 0; }

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 22px;
}
.panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 30px;
  position: relative;
  overflow: hidden;
}
.panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 250px at 100% 0%, rgba(122,162,255,.06), transparent 60%);
  pointer-events: none;
}
.panel p { color: var(--muted); margin: 0; }
.panel p + p { margin-top: 18px; }
.quote-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 100%;
}
.quote-card blockquote {
  margin: 0;
  font-size: clamp(23px, 2.8vw, 34px);
  line-height: 1.25;
  letter-spacing: -.03em;
}
html[lang="fa"] .quote-card blockquote { letter-spacing: 0; line-height: 1.6; }
.quote-card .signature { color: var(--muted); font-size: 12px; margin-top: 34px; }

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.expertise-card {
  padding: 26px;
  min-height: 235px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  transition: .25s ease;
  position: relative;
}
.expertise-card:hover { transform: translateY(-5px); background: var(--surface-strong); }
.card-index { font-size: 11px; color: var(--accent-2); font-weight: 800; letter-spacing: .12em; }
.expertise-card h3 { margin: 38px 0 12px; font-size: 19px; }
.expertise-card p { margin: 0; color: var(--muted); font-size: 14px; }

.timeline { position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 188px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}
html[lang="fa"] .timeline::before { left: auto; right: 188px; }
.timeline-item {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 56px;
  padding: 0 0 50px;
  position: relative;
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-year { color: var(--muted); font-size: 12px; padding-top: 4px; }
.timeline-content {
  position: relative;
  padding: 0 0 0 22px;
}
html[lang="fa"] .timeline-content { padding: 0 22px 0 0; }
.timeline-content::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent);
}
html[lang="fa"] .timeline-content::before { left: auto; right: -34px; }
.timeline-content h3 { margin: 0; font-size: 22px; }
.timeline-content .role { color: var(--accent-2); margin: 5px 0 12px; font-size: 13px; font-weight: 700; }
.timeline-content p { color: var(--muted); margin: 0; max-width: 780px; }
.inline-link { color: var(--text); display: inline-flex; align-items: center; gap: 7px; margin-top: 14px; font-size: 12px; font-weight: 700; }
.inline-link:hover { color: var(--accent-2); }

.industry-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.industry-tag { border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; font-size: 12px; color: var(--muted); background: var(--surface); }

.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.case-card {
  min-height: 210px;
  padding: 26px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: linear-gradient(145deg, var(--surface), transparent);
}
.case-card small { color: var(--accent-2); font-weight: 800; letter-spacing: .09em; text-transform: uppercase; }
.case-card h3 { margin: 34px 0 10px; font-size: 20px; }
.case-card p { margin: 0; color: var(--muted); font-size: 14px; }

.venture-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.venture-card {
  min-height: 320px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 30px;
  background:
    radial-gradient(500px 260px at 100% 0%, rgba(122,162,255,.12), transparent 62%),
    var(--surface);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: .25s ease;
}
.venture-card:hover { transform: translateY(-4px); }
.venture-card .meta { color: var(--accent-2); font-size: 12px; font-weight: 800; }
.venture-card h3 { font-size: 34px; margin: 12px 0; letter-spacing: -.035em; }
.venture-card p { color: var(--muted); max-width: 520px; }
.venture-link { align-self: flex-start; margin-top: 22px; }

.teaching-grid, .education-grid, .beyond-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.metric-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  min-height: 260px;
  background: var(--surface);
}
.metric-card strong { font-size: clamp(48px, 7vw, 82px); line-height: 1; letter-spacing: -.06em; display: block; }
.metric-card h3 { margin: 28px 0 10px; font-size: 20px; }
.metric-card p { margin: 0; color: var(--muted); }

.edu-card, .beyond-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--surface);
}
.edu-card h3, .beyond-card h3 { margin: 0 0 10px; font-size: 20px; }
.edu-card p, .beyond-card p { margin: 0; color: var(--muted); }
.cert-list { margin-top: 18px; display: grid; gap: 10px; }
.cert {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 16px;
}
.cert strong { font-size: 13px; color: var(--accent-2); }
.cert span { color: var(--muted); font-size: 13px; }

.beyond-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  position: relative;
  overflow: hidden;
}
.beyond-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px 220px at 100% 0%, rgba(143,227,255,.10), transparent 66%),
    linear-gradient(to top, rgba(0,0,0,.1), transparent);
}
.beyond-card > * { position: relative; z-index: 1; }
.beyond-card .big-word {
  position: absolute;
  top: 10px;
  left: 20px;
  font-size: clamp(64px, 10vw, 130px);
  font-weight: 800;
  letter-spacing: -.07em;
  color: color-mix(in srgb, var(--text) 4%, transparent);
  user-select: none;
}
html[lang="fa"] .beyond-card .big-word { left: auto; right: 20px; letter-spacing: 0; }

.community-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  background: var(--surface);
}
.community-card h3 { margin: 0 0 8px; }
.community-card p { margin: 0; color: var(--muted); }

.contact {
  padding: 110px 0 60px;
}
.contact-shell {
  border: 1px solid var(--line);
  border-radius: 34px;
  padding: clamp(30px, 6vw, 72px);
  background:
    radial-gradient(700px 400px at 90% 10%, rgba(122,162,255,.14), transparent 65%),
    var(--surface);
  text-align: center;
}
.contact-shell h2 { margin: 0; font-size: clamp(40px, 7vw, 86px); letter-spacing: -.055em; line-height: 1; }
html[lang="fa"] .contact-shell h2 { letter-spacing: -.03em; }
.contact-shell p { color: var(--muted); max-width: 650px; margin: 22px auto 0; }
.contact-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 30px; }

.site-footer { padding: 26px 0 40px; color: var(--muted); font-size: 12px; }
.footer-grid { display: flex; justify-content: space-between; align-items: center; gap: 20px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

[hidden] { display: none !important; }

@media (max-width: 1020px) {
  .nav-links { display: none; }
  .menu-btn { display: inline-flex; }
  .nav-links.mobile-open {
    position: absolute;
    display: grid;
    top: 72px;
    left: 20px;
    right: 20px;
    padding: 20px;
    gap: 16px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: color-mix(in srgb, var(--bg-soft) 94%, transparent);
    box-shadow: var(--shadow);
  }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { padding-top: 24px; }
  .hero-portrait-wrap { min-height: auto; justify-content: flex-start; }
  .hero-portrait-card { max-width: 520px; }
  .floating-note { left: 22px; }
  html[lang="fa"] .floating-note { left: auto; right: 22px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-inline-start: 0; border-top: 1px solid var(--line); }
  .stat:nth-child(4) { border-top: 1px solid var(--line); }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  :root { --header-h: 70px; }
  .container { width: min(calc(100% - 28px), var(--container)); }
  .brand-copy span { display: none; }
  .hero { padding-top: calc(var(--header-h) + 40px); }
  .hero h1 { font-size: clamp(46px, 16vw, 74px); }
  .hero-lead { font-size: 16px; }
  .hero-portrait-wrap { min-height: auto; }
  .section { padding: 78px 0; }
  .section-head, .about-grid, .venture-grid, .teaching-grid, .education-grid, .beyond-grid { grid-template-columns: 1fr; }
  .section-head { gap: 20px; margin-bottom: 38px; }
  .expertise-grid, .case-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat + .stat { border-inline-start: 0; border-top: 1px solid var(--line); }
  .timeline::before { left: 6px; }
  html[lang="fa"] .timeline::before { right: 6px; left: auto; }
  .timeline-item { grid-template-columns: 1fr; gap: 10px; padding-left: 30px; }
  html[lang="fa"] .timeline-item { padding-left: 0; padding-right: 30px; }
  .timeline-content { padding-left: 0; }
  html[lang="fa"] .timeline-content { padding-right: 0; }
  .timeline-content::before { left: -29px; }
  html[lang="fa"] .timeline-content::before { left: auto; right: -29px; }
  .community-card { grid-template-columns: 1fr; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
}