/* =========================================================
   NEWTON OPTIC — Design System
   Palette: near-black ground, brushed-silver accents,
   inspired by lens glass, metal frames and refracted light.
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Vazirmatn:wght@300;400;500;600;700;800&family=Poppins:wght@200;300;400;500&display=swap');

:root{
  --bg:            #0a0a0b;
  --bg-elev:       #131316;
  --bg-elev-2:     #1b1c20;
  --line:          #2a2b2f;
  --line-soft:     #1f2023;
  --silver-dim:    #7a7f88;
  --silver:        #c6cad2;
  --silver-bright: #eef0f3;
  --white:         #f7f8f9;
  --focus:         #eef0f3;

  --grad-lens: linear-gradient(135deg, #f2f3f5 0%, #b7bcc4 42%, #6c7078 75%, #34363b 100%);
  --grad-line: linear-gradient(90deg, transparent, #c6cad2, transparent);

  --font-fa: 'Vazirmatn', sans-serif;
  --font-en: 'Poppins', sans-serif;

  --container: 1160px;
}

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

html{ scroll-behavior:smooth; }

body{
  margin:0;
  background:var(--bg);
  color:var(--silver);
  font-family:var(--font-fa);
  direction:rtl;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}

img{ max-width:100%; display:block; }

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

::selection{ background:var(--silver-bright); color:#000; }

:focus-visible{
  outline:2px solid var(--focus);
  outline-offset:3px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- layout helpers ---------- */
.wrap{
  max-width:var(--container);
  margin:0 auto;
  padding:0 28px;
}

.eyebrow{
  font-family:var(--font-en);
  font-size:12px;
  letter-spacing:.24em;
  text-transform:uppercase;
  color:var(--silver-dim);
}

.divider{
  height:1px;
  width:100%;
  background:var(--grad-line);
  border:0;
  margin:0;
}

.section{ padding:88px 0; }
.section--tight{ padding:56px 0; }

.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  margin-bottom:44px;
  flex-wrap:wrap;
}

.section-head h2{
  font-size:clamp(26px,3.4vw,38px);
  margin:6px 0 0;
  color:var(--silver-bright);
  font-weight:700;
}

.section-head p{
  max-width:520px;
  color:var(--silver-dim);
  margin:10px 0 0;
  font-size:15px;
}

/* ---------- lens motif (signature element) ---------- */
.lens{
  --size:120px;
  width:var(--size);
  height:var(--size);
  border-radius:50%;
  position:relative;
  background:
    radial-gradient(circle at 34% 30%, rgba(255,255,255,.55), rgba(255,255,255,0) 40%),
    var(--grad-lens);
  box-shadow:0 0 0 1px rgba(255,255,255,.08), inset 0 0 30px rgba(0,0,0,.55);
}
.lens::after{
  content:"";
  position:absolute; inset:14%;
  border-radius:50%;
  border:1px solid rgba(0,0,0,.35);
  box-shadow: inset 0 0 12px rgba(0,0,0,.45);
}

.refract{
  position:relative;
  height:1px;
  background:var(--grad-line);
  overflow:visible;
}
.refract::after{
  content:"";
  position:absolute;
  top:-3px;
  right:0;
  width:7px; height:7px;
  border-radius:50%;
  background:var(--silver-bright);
  box-shadow:0 0 12px 2px rgba(238,240,243,.65);
  animation:travel 5.5s ease-in-out infinite;
}
@keyframes travel{
  0%{ right:0; opacity:0; }
  8%{ opacity:1; }
  50%{ right:calc(100% - 7px); }
  92%{ opacity:1; }
  100%{ right:calc(100% - 7px); opacity:0; }
}

/* ---------- nav ---------- */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(10,10,11,.82);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line-soft);
}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:12px;
  font-family:var(--font-en);
}
.brand .logo-img{
  height:34px;
  width:auto;
  display:block;
  border-radius:5px;
  transition:transform .3s ease;
}
.brand:hover .logo-img{ transform:scale(1.05); }
.brand .word{
  font-size:19px;
  letter-spacing:.22em;
  color:var(--silver-bright);
  font-weight:500;
}
.brand .since{
  font-size:10px;
  letter-spacing:.14em;
  color:var(--silver-dim);
  display:block;
  margin-top:1px;
}

.nav-links{
  display:flex;
  gap:34px;
  list-style:none;
  margin:0; padding:0;
  font-size:14px;
}
.nav-links a{
  color:var(--silver);
  position:relative;
  padding:6px 0;
  transition:color .2s ease;
}
.nav-links a::after{
  content:"";
  position:absolute; right:0; bottom:0;
  width:0; height:1px;
  background:var(--silver-bright);
  transition:width .25s ease;
}
.nav-links a:hover,
.nav-links a[aria-current="page"]{ color:var(--silver-bright); }
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after{ width:100%; }

.nav-toggle{
  display:none;
  background:none; border:1px solid var(--line);
  color:var(--silver-bright);
  width:40px; height:40px; border-radius:8px;
  font-size:18px;
  cursor:pointer;
}

@media (max-width:820px){
  .nav-links{
    position:fixed; inset:64px 0 auto 0;
    background:var(--bg-elev);
    border-bottom:1px solid var(--line);
    flex-direction:column;
    gap:0;
    padding:8px 28px 18px;
    transform:translateY(-8px);
    opacity:0;
    pointer-events:none;
    transition:all .22s ease;
  }
  .nav-links.open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  .nav-links li{ border-bottom:1px solid var(--line-soft); }
  .nav-links a{ display:block; padding:14px 2px; }
  .nav-toggle{ display:block; }
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 26px;
  border-radius:999px;
  font-size:14px;
  border:1px solid var(--line);
  transition:all .25s ease;
}
.btn--solid{
  background:var(--grad-lens);
  color:#0a0a0b;
  font-weight:600;
  border:0;
}
.btn--solid:hover{ filter:brightness(1.08); transform:translateY(-1px); }
.btn--ghost{ color:var(--silver-bright); }
.btn--ghost:hover{ border-color:var(--silver-bright); }

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:110px 0 90px;
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(700px 340px at 80% -10%, rgba(198,202,210,.10), transparent 60%),
    radial-gradient(600px 300px at 5% 110%, rgba(198,202,210,.06), transparent 60%);
  pointer-events:none;
}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:56px;
  align-items:center;
  position:relative;
}
@media (max-width:900px){ .hero-grid{ grid-template-columns:1fr; } }

.hero h1{
  font-family:var(--font-en);
  font-size:clamp(40px,6.4vw,74px);
  letter-spacing:.05em;
  color:var(--silver-bright);
  margin:18px 0 0;
  line-height:1.05;
  font-weight:500;
}
.hero h1 span{
  display:block;
  font-family:var(--font-fa);
  font-size:clamp(16px,2vw,20px);
  letter-spacing:0;
  color:var(--silver-dim);
  margin-top:16px;
  font-weight:400;
}
.hero p.lead{
  margin:26px 0 0;
  font-size:17px;
  max-width:520px;
  color:var(--silver);
}
.hero-cta{ display:flex; gap:14px; margin-top:36px; flex-wrap:wrap; }

.hero-visual{
  position:relative;
  display:flex; align-items:center; justify-content:center;
  min-height:280px;
}
.cornea{ display:none; } /* legacy */

/* ---------- brand logo plate (3D card treatment) ---------- */
.logo-plate{
  position:relative;
  border-radius:16px;
  overflow:hidden;
  background:#000;
  display:flex; align-items:center; justify-content:center;
  padding:16px 20px;
  box-shadow:
    0 24px 48px rgba(0,0,0,.6),
    0 0 0 1px rgba(255,255,255,.12),
    inset 0 -10px 20px rgba(0,0,0,.4),
    inset 0 6px 10px rgba(255,255,255,.08);
  transform:perspective(700px) rotateX(6deg);
}
.logo-plate img{
  width:100%; height:auto;
  display:block;
}
.logo-plate::after{
  content:"";
  position:absolute; inset:0;
  border-radius:16px;
  background:radial-gradient(circle at 28% 20%, rgba(255,255,255,.14), rgba(255,255,255,0) 50%);
  pointer-events:none;
}

.logo-plate--hero{ width:280px; }
.logo-plate--hero-small{
  width:110px;
  position:absolute;
  bottom:6px; right:8%;
  opacity:.92;
}
.logo-plate--about{ width:190px; }

@media (max-width:480px){
  .logo-plate--hero{ width:220px; }
}

/* ---------- original glasses illustration (hero signature) ---------- */
.glasses-art{
  width:100%;
  max-width:460px;
  filter:drop-shadow(0 30px 40px rgba(0,0,0,.55));
}
.glasses-art .frame{ fill:url(#frameGrad); }
.glasses-art .rim{ fill:none; stroke:url(#rimGrad); stroke-width:1.4; }
.glasses-art .glass{ fill:url(#glassGrad); }
.glasses-art .shine{ fill:#fff; opacity:.16; }
.glasses-art .hinge{ fill:var(--silver); opacity:.9; }

/* ---------- hero product photo ---------- */
.hero-photo-wrap{
  position:relative;
  width:100%;
  max-width:400px;
  margin-inline:auto;
}
.hero-photo-wrap::before{
  content:"";
  position:absolute; inset:-50px;
  background:radial-gradient(circle, rgba(198,202,210,.20), transparent 68%);
  filter:blur(10px);
  z-index:0;
}
.hero-photo{
  position:relative;
  z-index:1;
  aspect-ratio:4/4.5;
  border-radius:22px;
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 40px 70px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.03);
}
.hero-photo img{
  width:100%; height:100%;
  object-fit:cover;
  display:block;
  filter:saturate(0.92) contrast(1.03);
}
.hero-photo .tag{
  position:absolute;
  bottom:16px; right:16px;
  background:rgba(10,10,11,.65);
  backdrop-filter:blur(6px);
  border:1px solid rgba(255,255,255,.12);
  padding:8px 14px;
  border-radius:999px;
  font-family:var(--font-en);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--silver-bright);
}

/* ---------- stat strip ---------- */
.stats{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.stats .stat{
  padding:30px 20px;
  text-align:center;
  border-inline-start:1px solid var(--line-soft);
}
.stats .stat:first-child{ border-inline-start:0; }
.stats .num{
  font-family:var(--font-en);
  font-size:clamp(24px,3vw,34px);
  color:var(--silver-bright);
  display:block;
}
.stats .label{
  font-size:13px;
  color:var(--silver-dim);
  margin-top:6px;
}
@media (max-width:700px){
  .stats{ grid-template-columns:1fr; }
  .stats .stat{ border-inline-start:0; border-top:1px solid var(--line-soft); }
  .stats .stat:first-child{ border-top:0; }
}

/* ---------- cards grid (home quick links) ---------- */
.link-cards{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
.link-card{
  background:var(--bg);
  padding:34px 26px;
  transition:background .25s ease;
  min-height:180px;
  display:flex; flex-direction:column; justify-content:space-between;
}
.link-card:hover{ background:var(--bg-elev); }
.link-card .idx{
  font-family:var(--font-en);
  color:var(--silver-dim);
  font-size:13px;
}
.link-card h3{
  color:var(--silver-bright);
  font-size:18px;
  margin:22px 0 6px;
}
.link-card p{ font-size:13.5px; color:var(--silver-dim); margin:0; }
.link-card .go{
  margin-top:18px;
  font-family:var(--font-en);
  font-size:12px;
  letter-spacing:.14em;
  color:var(--silver);
}
@media (max-width:900px){ .link-cards{ grid-template-columns:1fr 1fr; } }
@media (max-width:560px){ .link-cards{ grid-template-columns:1fr; } }

/* ---------- branch cards ---------- */
.branches{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
@media (max-width:820px){ .branches{ grid-template-columns:1fr; } }

.branch-card{
  background:var(--bg);
  padding:0;
  display:flex;
  flex-direction:column;
}
.branch-photo{
  aspect-ratio:16/9;
  background:
    linear-gradient(160deg, var(--bg-elev-2), var(--bg-elev));
  position:relative;
  display:flex; align-items:center; justify-content:center;
  border-bottom:1px solid var(--line-soft);
}
.branch-photo svg{ width:56px; height:56px; opacity:.5; }
.branch-photo .ph-label{
  position:absolute;
  bottom:12px; inset-inline-start:14px;
  font-family:var(--font-en);
  font-size:10px;
  letter-spacing:.14em;
  color:var(--silver-dim);
  text-transform:uppercase;
}
.branch-body{ padding:28px 26px 32px; flex:1; display:flex; flex-direction:column; }
.branch-number{
  font-family:var(--font-en);
  font-size:12px;
  color:var(--silver-dim);
  letter-spacing:.14em;
}
.branch-body h3{
  color:var(--silver-bright);
  font-size:21px;
  margin:10px 0 16px;
}
.branch-meta{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:12px; }
.branch-meta li{
  display:flex;
  gap:12px;
  align-items:flex-start;
  font-size:14.5px;
  color:var(--silver);
}
.branch-meta svg{ flex:none; width:18px; height:18px; margin-top:2px; color:var(--silver-dim); }
.branch-meta .lbl{ color:var(--silver-dim); font-size:12px; display:block; margin-bottom:2px; }

/* ---------- about page ---------- */
.about-grid{
  display:grid;
  grid-template-columns:.9fr 1.1fr;
  gap:64px;
  align-items:start;
}
@media (max-width:860px){ .about-grid{ grid-template-columns:1fr; gap:40px; } }

.about-figure{
  position:sticky; top:110px;
  display:flex; flex-direction:column; align-items:flex-start; gap:22px;
}
.timeline{
  list-style:none; margin:0; padding:0;
  border-inline-start:1px solid var(--line);
  padding-inline-start:26px;
  display:flex; flex-direction:column; gap:28px;
}
.timeline li{ position:relative; }
.timeline li::before{
  content:"";
  position:absolute; right:-31px; top:4px;
  width:9px; height:9px; border-radius:50%;
  background:var(--silver-bright);
  box-shadow:0 0 0 3px var(--bg), 0 0 0 4px var(--line);
}
.timeline .y{
  font-family:var(--font-en);
  color:var(--silver-bright);
  font-size:14px;
  letter-spacing:.06em;
  display:block; margin-bottom:4px;
}
.timeline p{ margin:0; color:var(--silver-dim); font-size:14.5px; }

.pull{
  font-size:22px;
  color:var(--silver-bright);
  line-height:1.7;
  font-weight:500;
  margin:0 0 22px;
  border-inline-start:2px solid var(--silver-bright);
  padding-inline-start:20px;
}

/* ---------- insurance ---------- */
.insurance-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:12px;
}
@media (max-width:860px){ .insurance-grid{ grid-template-columns:repeat(3,1fr); } }
@media (max-width:600px){ .insurance-grid{ grid-template-columns:repeat(2,1fr); } }

.insurance-chip{
  position:relative;
  border:1px solid var(--line);
  border-radius:14px;
  padding:22px 14px;
  min-height:92px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  font-size:14px;
  color:var(--silver);
  transition:all .2s ease;
  overflow:hidden;
  perspective:600px;
}
.insurance-chip:hover,
.insurance-chip:focus-visible{
  border-color:var(--silver-bright);
  color:var(--silver-bright);
  transform:translateY(-2px);
  outline:none;
}
.insurance-chip .chip-label{
  display:block;
  transition:opacity .25s ease;
}
.insurance-chip .chip-logo{
  position:absolute;
  inset:0;
  display:flex;
  align-items:center;
  justify-content:center;
  background:#f4f5f7;
  border-radius:13px;
  padding:12px;
  opacity:0;
  transform:rotateY(90deg) scale(.92);
  transform-origin:center;
  transition:opacity .35s ease, transform .4s cubic-bezier(.2,.8,.3,1.2);
  pointer-events:none;
}
.insurance-chip .chip-logo img{
  max-width:100%;
  max-height:100%;
  object-fit:contain;
}
.insurance-chip:hover .chip-label,
.insurance-chip:focus-visible .chip-label{ opacity:0; }
.insurance-chip:hover .chip-logo,
.insurance-chip:focus-visible .chip-logo{
  opacity:1;
  transform:rotateY(0deg) scale(1);
}
@media (prefers-reduced-motion: reduce){
  .insurance-chip .chip-logo{ transform:none; }
}

.note-box{
  margin-top:40px;
  border:1px dashed var(--line);
  border-radius:14px;
  padding:22px 26px;
  color:var(--silver-dim);
  font-size:14px;
  display:flex; gap:14px; align-items:flex-start;
}
.note-box svg{ flex:none; width:20px; height:20px; margin-top:2px; }

/* ---------- contact ---------- */
.contact-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:1px;
  background:var(--line-soft);
  border:1px solid var(--line-soft);
}
@media (max-width:820px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-card{
  background:var(--bg);
  padding:34px 30px;
}
.contact-card h3{ color:var(--silver-bright); margin:0 0 18px; font-size:17px; }
.contact-list{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:16px; }
.contact-list a{ display:flex; gap:12px; align-items:center; font-size:15px; }
.contact-list svg{ width:18px; height:18px; color:var(--silver-dim); flex:none; }
.contact-list a:hover{ color:var(--silver-bright); }

/* ---------- footer ---------- */
.site-footer{
  border-top:1px solid var(--line-soft);
  padding:44px 0 30px;
  margin-top:40px;
}
.footer-grid{
  display:flex;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.footer-grid .brand .word{ font-size:16px; }
.foot-links{ display:flex; gap:26px; list-style:none; margin:0; padding:0; font-size:13.5px; }
.foot-links a:hover{ color:var(--silver-bright); }
.foot-bottom{
  margin-top:26px;
  padding-top:20px;
  border-top:1px solid var(--line-soft);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px;
  font-size:12.5px; color:var(--silver-dim);
}

/* ---------- page hero (inner pages) ---------- */
.page-hero{
  padding:70px 0 40px;
  border-bottom:1px solid var(--line-soft);
}
.page-hero h1{
  font-size:clamp(30px,4vw,44px);
  color:var(--silver-bright);
  margin:10px 0 0;
}
.page-hero p{ color:var(--silver-dim); max-width:560px; margin:14px 0 0; font-size:15px; }