:root{
  --bg:#06141B;
  --text:#EAF2F6;
  --muted: rgba(234,242,246,.74);
  --font-fa: "Vazirmatn", "IRANSans", "Tahoma", "Segoe UI", sans-serif;

  --border: rgba(91,59,255,.35);
  --border-soft: rgba(91,59,255,.22);

  --container: 1200px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
}

html, body { height: 100%; }
body{
  margin:0;
  background:
    radial-gradient(900px 600px at 50% 20%, rgba(91,59,255,.10), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.02), transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

html[lang="fa"] body{
  font-family: Vazirmatn, Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

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

.container{
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 10;
  overflow: hidden;
  background: transparent;
  border-bottom: none;
  backdrop-filter: none;
  box-shadow: 0 12px 28px rgba(0,0,0,.14);
  transition:
    transform 420ms ease,
    background-color 420ms ease,
    border-color 420ms ease,
    backdrop-filter 420ms ease,
    opacity 360ms ease,
    filter 360ms ease,
    box-shadow 390ms ease;
}
.site-header::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(120deg,
    transparent 0%,
    rgba(255,255,255,.08) 40%,
    rgba(255,255,255,.18) 50%,
    rgba(255,255,255,.08) 60%,
    transparent 80%);
  opacity: 0;
  transform: translateX(-140%);
  pointer-events: none;
}
.site-header.is-hidden{
  transform: translateY(-110%);
  opacity: 0;
  filter: blur(6px);
  box-shadow: 0 22px 60px rgba(0,0,0,.28);
}
.site-header:not(.is-hidden)::after{
  animation: glowSweep 1.05s ease;
}
.site-header.is-solid{
  background: rgba(6,20,27,.82);
  border-bottom: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
}

@keyframes glowSweep{
  0%{
    opacity: 0;
    transform: translateX(-140%);
  }
  20%{
    opacity: .5;
  }
  60%{
    opacity: .35;
  }
  100%{
    opacity: 0;
    transform: translateX(140%);
  }
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  height: 76px;
}
.brand{
  display:flex;
  align-items:center;
  font-weight: 600;
  letter-spacing: .2px;
  color: inherit;
  gap: 10px;
}
.brand-logo{
  display:block;
  height: 48px;
  width: auto;
  color: #fff;
}
.menu-toggle{
  display:none;
  width: 38px;
  height: 32px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px;
  background: rgba(0,0,0,.14);
  color: inherit;
  padding: 6px 8px;
  gap: 4px;
  flex-direction: column;
  align-items: stretch;
  justify-content: center;
}
.menu-toggle span{
  display:block;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}
.nav{
  display:flex;
  gap: 42px;
  font-weight: 500;
  color: rgba(234,242,246,.9);
}
.lang{
  display:flex;
  align-items:center;
  gap: 8px;
  color: rgba(234,242,246,.78);
  font-size: 13px;
}
.lang .sep{ opacity: .5; }
.lang-link{
  padding-block: 4px;
  padding-inline: 6px;
  opacity: .65;
  text-decoration: none;
  transition: opacity 180ms ease, text-decoration-color 180ms ease;
}
.lang-link:hover{
  opacity: .9;
  text-decoration: underline;
  text-decoration-color: currentColor;
}
html[lang="en"] .lang-link[href*="lang=en"],
html[lang="fr"] .lang-link[href*="lang=fr"],
html[lang="fa"] .lang-link[href*="lang=fa"]{
  opacity: 1;
  text-decoration: underline;
}

html[dir="rtl"] .header-inner{ flex-direction: row-reverse; }
html[dir="rtl"] .nav{ flex-direction: row-reverse; }

.site-main{
  padding-block: var(--space-7);
  background: var(--bg);
}

.hero{
  display:flex;
  flex-direction: column;
  align-items:center;
  gap: var(--space-6);
}

@keyframes orbSpin{
  to { transform: rotate(360deg); }
}

.hero-orb{
  width: min(700px, 88vw);
  aspect-ratio: 1 / 1;
  border-radius: 999px;
  position: relative;

  display:flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;

  padding: clamp(22px, 3vw, 48px);

  background: radial-gradient(80% 80% at 50% 35%, rgba(0,0,0,.12), rgba(0,0,0,.24));
  border: none;
}

.hero-orb::before{
  content:"";
  position:absolute;
  inset:0;
  padding:8px;              /* ring thickness */
  border-radius: inherit;

  background:
    conic-gradient(
      from 0deg,
      rgba(63,0,195,.80) 0deg,
      rgba(63,0,195,.80) 120deg,
      rgba(4,120,146,.80) 240deg,
      rgba(63,0,195,.80) 360deg
    );
  animation: orbSpin 4s linear infinite;
  will-change: transform;

  /* cut out the center so it becomes a stroke/ring */
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;

  z-index: 1;
  pointer-events: none;
}
.hero-orb::after{
  content:"";
  position:absolute;
  inset:-60px;                 /* halo lives outside */
  border-radius: inherit;
  pointer-events:none;
  z-index: 0;

  background: conic-gradient(
    from 0deg,
    rgba(63,0,195,.80) 0deg,
    rgba(63,0,195,.80) 120deg,
    rgba(4,120,146,.80) 240deg,
    rgba(63,0,195,.80) 360deg
  );

  /* blur turns it into light; keep it outside */
  filter: blur(34px);
  opacity: .22;
  mix-blend-mode: screen;

  /* same rotation so it stays synced */
  animation: orbSpin 4s linear infinite;
  will-change: transform;

  /* show halo only OUTSIDE the orb */
-webkit-mask: radial-gradient(closest-side,
  transparent 0%,
  transparent 82%,
  rgba(0,0,0,0) 84%,
  rgba(0,0,0,.75) 88%,
  rgba(0,0,0,.25) 97%,
  rgba(0,0,0,0) 100%);
        mask: radial-gradient(closest-side,
  transparent 0%,
  transparent 82%,
  rgba(0,0,0,0) 84%,
  rgba(0,0,0,.75) 88%,
  rgba(0,0,0,.25) 97%,
  rgba(0,0,0,0) 100%);

}

.hero-name{
  margin:0;
  font-size: clamp(34px, 3.6vw, 52px);
  letter-spacing: .2px;
}
.hero-title{
  margin-top: var(--space-5);
  font-size: clamp(15px, 1.35vw, 18px);
  font-weight: 600;
  color: rgba(234,242,246,.92);
}
.hero-summary{
  margin-top: var(--space-5);
  max-width: 64ch;
  line-height: 1.75;
  color: var(--muted);
  font-size: 15px;
}
html[dir="ltr"] .hero-title,
html[dir="ltr"] .hero-summary{
  text-align: left;
}
html[lang="fr"] .hero-summary{
  text-align: justify;
}
.hero-link{
  margin-top: calc(var(--space-6) * 2.5);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 16px 32px;
  border-radius: 12px;
  border: 2px solid rgba(91,59,255,.65);
  background: rgba(0,0,0,.18);
  text-decoration:none;
  font-weight: 600;
}
.hero-link:hover{
  text-decoration:none;
  background: rgba(91,59,255,.10);
}

.stats{
  width: min(980px, 96vw);
  box-sizing: border-box;
  border-radius: 26px;
  border: 1px solid rgba(91,59,255,.45);
  background: rgba(0,0,0,.14);
  display:flex;
  align-items: stretch;
  justify-content: space-between;
  padding: var(--space-5);
  box-shadow: none;
  margin-top: var(--space-7);
  margin-bottom: calc(var(--space-8) + var(--space-6));
}
.stat{
  flex: 1;
  text-align:center;
  padding-block: var(--space-2);
}
.stat-label{
  color: rgba(234,242,246,.75);
  font-size: 13px;
  margin-bottom: 8px;
}
.stat-value{
  font-size: 22px;
  font-weight: 700;
}
.divider{
  width: 1px;
  background: rgba(234,242,246,.12);
  margin-inline: var(--space-4);
}

.section{
  margin-top: var(--space-8);
  width: min(980px, 96vw);
  margin-inline: auto;
  background: transparent;
  box-shadow: none;
  box-sizing: border-box;
  padding-inline: 0;
}
.section-title{
  font-size: 34px;
  margin: 0 0 var(--space-7) 0;
}

.hover-letters span{
  display:inline-block;
  transition: color 260ms ease, text-shadow 320ms ease;
}
.hover-letters span:hover{
  color: rgba(91,59,255,.92);
  text-shadow: 0 0 12px rgba(91,59,255,.36);
}
html[dir="rtl"] .hover-letters-rtl{
  transition: color 260ms ease, text-shadow 320ms ease;
}
html[dir="rtl"] .hover-letters-rtl:hover{
  color: rgba(91,59,255,.92);
  text-shadow: 0 0 12px rgba(91,59,255,.36);
}

.expertise-grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-5);
}
.expertise-card{
  border-radius: 18px;
  border: 1px solid rgba(91,59,255,.28);
  background: rgba(0,0,0,.14);
  padding: 26px 22px;
  min-height: 92px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  color: rgba(234,242,246,.9);
  line-height: 1.4;
  box-shadow: none;
}

.prose{
  max-width: 70ch;
  color: var(--muted);
  line-height: 1.8;
}
.mono-link{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', monospace;
}

.projects-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--space-5);
  margin-top: var(--space-6);
}
.projects-list{
  display:grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: var(--space-4);
  margin-top: var(--space-5);
}
.projects-controls{
  display:flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items:center;
  justify-content: space-between;
  margin-top: var(--space-5);
}
.projects-search input{
  background: rgba(0,0,0,.14);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 12px;
  color: var(--text);
  padding: 10px 12px;
  min-width: 220px;
}
.projects-filters{
  display:flex;
  align-items:center;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.filter-label{
  color: rgba(234,242,246,.7);
  font-size: 13px;
}
.tag-chips{
  display:flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-chips .chip{
  cursor: pointer;
  transition: border-color 180ms ease, opacity 180ms ease;
}
.tag-chips .chip.is-active{
  border-color: rgba(91,59,255,.65);
  color: var(--text);
  opacity: 1;
}
.projects-sort{
  display:flex;
  align-items:center;
  gap: 8px;
}
.projects-sort label{
  color: rgba(234,242,246,.7);
  font-size: 13px;
}
.projects-sort select{
  background: rgba(0,0,0,.14);
  border: 1px solid rgba(255,255,255,.10);
  color: var(--text);
  border-radius: 10px;
  padding: 8px 10px;
}
.projects-note{
  margin-top: var(--space-4);
  color: rgba(234,242,246,.7);
}
.project-card{
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(0,0,0,.14);
  padding: var(--space-6);
}
.project-card h3{
  margin: 0 0 var(--space-3) 0;
}
.project-card p{
  margin: 0 0 var(--space-4) 0;
  color: var(--muted);
  line-height: 1.7;
}
.project-card .meta{
  color: rgba(234,242,246,.7);
  font-size: 13px;
}
.project-summary{ color: var(--muted); line-height: 1.6; margin: var(--space-3) 0; }
.project-meta{
  display:flex;
  gap: var(--space-3);
  color: rgba(234,242,246,.7);
  font-size: 13px;
  flex-wrap: wrap;
}
.project-tags{
  display:flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: var(--space-3);
}
.chip{
  display:inline-flex;
  align-items:center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.04);
  color: rgba(234,242,246,.85);
  font-size: 12px;
  line-height: 1;
}
.reveal{
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 320ms ease, transform 320ms ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}
.cv-timeline{
  border-inline-start: 1px solid rgba(255,255,255,.12);
  padding-inline-start: var(--space-5);
  display: grid;
  gap: var(--space-4);
}
.cv-item{
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 14px;
  background: rgba(0,0,0,.12);
  padding: var(--space-4);
}
.cv-item summary{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: var(--space-3);
  cursor: pointer;
  color: var(--text);
}
.cv-item summary::-webkit-details-marker{ display:none; }
.cv-summary{
  display:flex;
  flex-direction: column;
  gap: 4px;
}
.cv-title{ font-weight: 700; }
.cv-company{ color: rgba(234,242,246,.75); font-size: 13px; }
.cv-meta{ color: rgba(234,242,246,.65); font-size: 12px; white-space: nowrap; }
.cv-item ul{
  margin: var(--space-3) 0 0 0;
  padding-inline-start: var(--space-4);
  color: var(--muted);
  line-height: 1.7;
}
.cv-item[open] summary{ margin-bottom: var(--space-2); }
.cv-edu + .cv-edu{ margin-top: var(--space-3); }
.cv-tags{ display:flex; flex-wrap: wrap; gap: 8px; }
.about-note{ color: rgba(234,242,246,.7); font-size: 13px; }

@media (prefers-reduced-motion: reduce){
  .reveal{
    opacity: 1;
    transform: none;
    transition: none;
  }
  .contact-intro{
    animation: none;
    opacity: 1;
    transform: none;
  }
}
.projects-link{
  margin-top: var(--space-5);
  display:flex;
  justify-content:center;
}
.projects-link .hero-link{ margin-top: 0; }
.contact-card{ max-width: 520px; margin-top: var(--space-4); }
.contact-item{ margin: 0 0 var(--space-3) 0; }
html[dir="rtl"] .contact-card .prose{ text-align: right; }
html[dir="rtl"] .contact-card .mono-link{
  direction: ltr;
  text-align: left;
  display: inline-block;
}
html[lang="fa"] .contact-card .contact-item{
  text-align: right;
}
.contact-intro{
  animation: contactIntro 420ms ease-out 80ms both;
}
@keyframes contactIntro{
  from{ opacity: 0; transform: translateY(6px); }
  to{ opacity: 1; transform: translateY(0); }
}

@media (min-width: 1024px){
  .header-inner{
    padding-inline: var(--space-6);
  }
}

.site-footer{
  margin-top: var(--space-8);
  padding-block: calc(var(--space-7) * 0.8);
  border-top: none;
  background: transparent;
  box-shadow: none;
}
.footer-inner{
  display:flex;
  flex-direction: column;
  align-items:center;
  gap: var(--space-3);
  text-align:center;
}
.footer-connect{
  font-weight: 600;
}
.footer-icons{
  display:flex;
  gap: 14px;
}
.icon-btn{
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display:grid;
  place-items:center;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.14);
}
.icon-btn:hover{
  background: rgba(255,255,255,.06);
  text-decoration:none;
}
.footer-copy{
  color: rgba(234,242,246,.65);
  font-size: 13px;
}

@media (max-width: 980px){
  .nav{ gap: 26px; }
  .expertise-grid{ grid-template-columns: repeat(2, minmax(0,1fr)); }
  .projects-grid{ grid-template-columns: 1fr; }
  .projects-list{ grid-template-columns: 1fr; }
}

@media (max-width: 680px){
  .container{ padding-inline: var(--space-4); }
  .header-inner{
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    height: auto;
    padding-block: 10px;
  }
  .menu-toggle{ display:flex; }
  .nav{
    display:none;
    flex-direction: column;
    gap: var(--space-3);
    width: 100%;
    font-size: 14px;
    padding: var(--space-3) 0;
  }
  .site-header.is-menu-open .nav{ display:flex; }
  .lang{
    font-size: 12px;
    gap: 6px;
    margin-left: auto;
  }
  .stats{
    display:grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4);
  }
  .divider{ display:none; }
  .stat{ border: 1px solid rgba(255,255,255,.08); border-radius: 18px; background: rgba(0,0,0,.10); }
  .section-title{ font-size: 28px; }
}

@media (min-width: 681px){
  .hero-name{ margin-top: -12px; font-size: clamp(36px, 3.8vw, 56px); }
  .hero-title{
    margin-top: calc(var(--space-5) * 2);
    font-size: clamp(16px, 1.45vw, 20px);
  }
  .header-inner{
    position: relative;
    display:flex;
    align-items:center;
    justify-content: space-between;
  }
  .brand{
    margin: 0;
  }
  .nav{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
    justify-content: center;
  }
  .lang{
    margin-left: auto;
  }
  html[dir="rtl"] .header-inner{
    position: relative;
    display:flex;
    align-items:center;
    justify-content: space-between;
  }
  html[dir="rtl"] .brand{ margin: 0; }
  html[dir="rtl"] .nav{
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
  }
  html[dir="rtl"] .lang{
    margin-left: 0;
    margin-inline-start: auto;
  }
  .hero-link{
    margin-top: calc(var(--space-6) * 3);
    padding: 16px 32px;
  }
}

@media (max-width: 540px){
  .site-main{ padding-block: var(--space-6); }
  .section{ padding-inline: var(--space-4); }
  .expertise-grid{
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
  .hero{ gap: var(--space-5); }
  .hero-orb{
    width: min(468px, 83vw); /* ~10% smaller */
    padding: clamp(14px, 4.5vw, 28px);
  }
  .hero-name{ font-size: clamp(18px, 4.2vw, 24px); }
  .hero-title{ font-size: clamp(10px, 3vw, 12px); }
  .hero-summary{ font-size: 10px; line-height: 1.6; }
  .hero-link{
    margin-top: var(--space-5);
    padding: calc(32px / 3) calc(16px / 3);
    font-size: 11px;
  }
  .hero-orb::after{
    inset:-36px;
    filter: blur(28px);
  }
  html[dir="ltr"] .hero-title{
    text-align: center;
    font-size: clamp(9px, 2.7vw, 11px);
    padding-inline: var(--space-4);
  }
}

html[dir="rtl"]{
  body{
    text-align: right;
    font-family: var(--font-fa);
    line-height: 1.8;
    letter-spacing: normal;
  }
  .header-inner{
    flex-direction: row;
    justify-content: space-between;
  }
  .brand{
    order: 1;
    margin-inline-end: var(--space-5);
  }
  .nav{
    flex-direction: row-reverse;
    order: 2;
    margin-inline: auto;
  }
  .menu-toggle{
    order: 3;
  }
  .lang{
    order: 4;
    margin-left: 0;
    margin-inline-start: auto;
  }
  .hero-name,
  .hero-title,
  .section-title,
  .expertise-card{ text-align: right; }
  .hero-summary{
    text-align: justify;
  }
  .prose,
  .project-card p,
  .stat-label,
  .stat-value{ text-align: right; }
  .stats{ flex-direction: row-reverse; }
  .project-card{ text-align: right; }
  .projects-controls{ justify-content: flex-start; }
  .projects-search input{ text-align: right; }
  .tag-chips{ justify-content: flex-end; }
}

html[lang="fa"] .site-footer{
  background: var(--bg);
  box-shadow: none;
  border-top: none;
}
html[lang="en"] .site-footer,
html[lang="fr"] .site-footer{
  background: transparent;
  box-shadow: none;
  border-top: none;
}