/* Sheeler – Persian (RTL) site
   Visual language follows the original sheeler.ir (Enfold theme, 2015–2022):
   slim white header, full-width 470px hero slider, grey label tabs, dark socket. */

@font-face {
  font-family: "Vazirmatn";
  src: url("../fonts/Vazirmatn-wght.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --red: #e1251b;          /* letterhead red squares */
  --ink: #222;
  --text: #555;
  --muted: #888;
  --line: #e1e1e1;
  --bg: #fff;
  --bg-alt: #f8f8f8;
  --tab: #4d4d4d;          /* slider label tabs */
  --tab-dark: #333;
  --socket: #333;
  --socket-text: #aaa;
  --footer: #222;
  --header-h: 88px;
  --header-h-small: 60px;
  --wrap: 1210px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Vazirmatn", Tahoma, sans-serif;
  font-size: 15px;
  line-height: 1.9;
  direction: rtl;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--red); text-decoration: none; transition: color .2s; }
a:hover { color: var(--ink); }

h1, h2, h3, h4 { color: var(--ink); font-weight: 700; line-height: 1.5; margin: 0 0 .6em; }
h1 { font-size: 30px; }
h2 { font-size: 24px; }
h3 { font-size: 18px; }
p { margin: 0 0 1em; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 50px; }

.ltr { direction: ltr; unicode-bidi: embed; display: inline-block; }

/* ---------- Header ---------- */

.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.header.is-shrunk { box-shadow: 0 1px 8px rgba(0,0,0,.06); }

.header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
  transition: height .3s;
}
.header.is-shrunk .wrap { height: var(--header-h-small); }

.logo { display: flex; align-items: center; gap: 14px; height: 100%; }
.logo img { height: 100%; width: auto; max-height: 78px; transition: max-height .3s; }
.header.is-shrunk .logo img { max-height: 54px; }
.logo-squares { display: flex; gap: 3px; }
.logo-squares i { width: 10px; height: 10px; background: var(--red); display: block; }

.nav { height: 100%; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; height: 100%; }
.nav li { height: 100%; }
.nav a {
  display: flex; align-items: center; height: 100%;
  padding: 0 16px; color: #666; font-size: 14px; font-weight: 500;
  border-top: 2px solid transparent;
}
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); border-top-color: var(--red); }

.nav-toggle {
  display: none; background: none; border: 0; padding: 8px; cursor: pointer;
  color: var(--ink);
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 24px; height: 2px; background: currentColor; position: relative;
  transition: transform .25s, background .25s;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; right: 0; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero slider ---------- */

.slider {
  position: relative; height: 470px; overflow: hidden;
  background: #111;
  border-bottom: 1px solid var(--line);
}
.slide {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  opacity: 0; visibility: hidden;
  transition: opacity .9s ease, visibility 0s linear .9s;
}
.slide.is-active { opacity: 1; visibility: visible; transition: opacity .9s ease; }

.slide-inner {
  position: relative; height: 100%;
  max-width: 1100px; margin: 0 auto; padding: 0 50px;
  display: flex; align-items: center; justify-content: space-between; gap: 40px;
}
.slide-text { flex: 0 0 auto; display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.slide-media { position: relative; flex: 1 1 auto; height: 100%; }

/* layers fly in on the active slide, like the original LayerSlider */
.layer { opacity: 0; }
.slide.is-active .layer {
  animation: layer-in 1.2s cubic-bezier(.22,1,.36,1) both;
  animation-delay: var(--d, 0s);
}
.slide.is-active .layer.from-top    { animation-name: layer-in-top; }
.slide.is-active .layer.from-bottom { animation-name: layer-in-bottom; }
.slide.is-active .layer.from-left   { animation-name: layer-in-left; }
.slide.is-active .layer.fade        { animation-name: layer-fade; }

@keyframes layer-in        { from { opacity: 0; transform: translateX(80px); }  to { opacity: 1; transform: none; } }
@keyframes layer-in-left   { from { opacity: 0; transform: translateX(-80px); } to { opacity: 1; transform: none; } }
@keyframes layer-in-top    { from { opacity: 0; transform: translateY(-60px); } to { opacity: 1; transform: none; } }
@keyframes layer-in-bottom { from { opacity: 0; transform: translateY(60px); }  to { opacity: 1; transform: none; } }
@keyframes layer-fade      { from { opacity: 0; } to { opacity: 1; } }

.tab {
  display: inline-block; min-width: 200px;
  background: var(--tab); color: #fff;
  font-size: 17px; font-weight: 500; line-height: 36px;
  padding: 0 14px;
}
a.tab { transition: background .2s; }
a.tab:hover { background: var(--red); color: #fff; }
.tab--head { background: var(--tab-dark); font-weight: 700; min-width: 220px; margin-bottom: 6px; }
.tab--head::after {
  content: ""; display: inline-block; width: 8px; height: 8px; background: var(--red);
  margin-right: 10px; vertical-align: middle;
}

.slide-title { color: #fff; font-size: 34px; font-weight: 800; margin: 0; text-shadow: 0 2px 12px rgba(0,0,0,.4); }
.slide-sub { color: #eee; font-size: 17px; margin: 0; }

/* slide 1 */
.s1 .logo-white { width: 300px; }
.s1 .believe { width: 300px; filter: invert(1); mix-blend-mode: screen; margin-top: 6px; }
.s1 .m-echo { position: absolute; top: 40px; left: 230px; width: 300px; box-shadow: 0 10px 30px rgba(0,0,0,.5); }
.s1 .m-holo { position: absolute; top: 160px; left: 0; width: 300px; }
.s1 .m-proj { position: absolute; top: 250px; left: 420px; width: 170px; }

/* slide 2 */
.s2 .m-sketch { position: absolute; top: 20px; left: 0; width: 560px; }

/* slide 3 */
.s3 .m-lens { position: absolute; top: 60px; left: 0; width: 520px; }
.s3 .m-math { position: absolute; top: 150px; left: 300px; width: 330px; opacity: .85; }

/* slide 4: light collage background */
.s4 { background-color: #fff; }

.slider-arrow {
  position: absolute; top: 50%; z-index: 5; transform: translateY(-50%);
  width: 46px; height: 46px; border: 0; cursor: pointer;
  background: rgba(0,0,0,.35); color: #fff; font-size: 22px; line-height: 46px;
  opacity: 0; transition: opacity .3s, background .2s;
}
.slider:hover .slider-arrow, .slider-arrow:focus-visible { opacity: 1; }
.slider-arrow:hover { background: var(--red); }
.slider-arrow.prev { right: 0; }
.slider-arrow.next { left: 0; }

.slider-dots { position: absolute; bottom: 16px; left: 0; right: 0; z-index: 5; display: flex; justify-content: center; gap: 8px; }
.slider-dots button {
  width: 11px; height: 11px; padding: 0; border: 1px solid rgba(255,255,255,.8);
  background: rgba(0,0,0,.25); cursor: pointer; border-radius: 0;
}
.slider-dots button[aria-current="true"] { background: var(--red); border-color: var(--red); }

/* ---------- Page title bar (inner pages) ---------- */

.title-bar { background: var(--bg-alt); border-bottom: 1px solid var(--line); }
.title-bar .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 90px; gap: 20px; flex-wrap: wrap; }
.title-bar h1 { font-size: 22px; margin: 0; }
.breadcrumb { font-size: 13px; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--red); }

.page-banner { height: 260px; background-size: cover; background-position: center; border-bottom: 1px solid var(--line); }

/* ---------- Sections ---------- */

.section { padding: 70px 0; }
.section--alt { background: var(--bg-alt); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section--dark { background: #2b2b2b; color: #ccc; }
.section--dark h2, .section--dark h3 { color: #fff; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 45px; }
.section-head h2 { position: relative; padding-bottom: 14px; }
.section-head h2::after {
  content: ""; position: absolute; bottom: 0; right: 50%; transform: translateX(50%);
  width: 46px; height: 3px; background: var(--red);
}
.section-head p { color: var(--muted); margin-top: 14px; }

.lead { font-size: 17px; color: #444; }

.grid { display: grid; gap: 30px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); padding: 30px 26px;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover { border-color: #ccc; transform: translateY(-3px); box-shadow: 0 8px 22px rgba(0,0,0,.06); }
a.card, a.card:hover { display: block; color: var(--text); }
.card h3 { display: flex; align-items: center; gap: 10px; }
.card p { margin: 0; font-size: 14px; }
.card .more { display: inline-block; margin-top: 14px; font-size: 13px; font-weight: 600; }

.icon {
  width: 52px; height: 52px; margin-bottom: 18px;
  display: grid; place-items: center;
  background: var(--tab); color: #fff;
}
.icon svg { width: 26px; height: 26px; }
.card:hover .icon { background: var(--red); }

.step-num {
  font-size: 13px; font-weight: 700; color: var(--red); letter-spacing: .5px; margin-bottom: 6px; display: block;
}

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.split + .split { margin-top: 80px; }
.split--flip .split-media { order: -1; }
.split-media { background: var(--bg-alt); border: 1px solid var(--line); padding: 24px; }
.split-media.is-dark { background: #1c1c1c; border-color: #1c1c1c; }

.check { list-style: none; padding: 0; margin: 0 0 1em; }
.check li { position: relative; padding-right: 22px; margin-bottom: 6px; }
.check li::before {
  content: ""; position: absolute; right: 0; top: .78em; width: 8px; height: 8px; background: var(--red);
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.tag-list .tab { min-width: 0; font-size: 14px; line-height: 32px; }

.cta { text-align: center; }
.cta p { color: #bbb; max-width: 600px; margin: 0 auto 26px; }

.btn {
  display: inline-block; padding: 12px 30px; border: 0; cursor: pointer;
  background: var(--red); color: #fff; font: inherit; font-weight: 600; font-size: 15px;
  transition: background .2s;
}
.btn:hover { background: #b81d15; color: #fff; }
.btn--ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.6); }
.btn--ghost:hover { background: #fff; color: var(--ink); }

/* Content the company still needs to supply. Remove the class once filled. */
.todo {
  background: #fff7d6; border: 1px dashed #d4a300; color: #7a5d00;
  padding: 0 6px; font-weight: 600;
}
div.todo, p.todo { padding: 12px 16px; display: block; }

/* ---------- Contact ---------- */

.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.contact-list li:last-child { border-bottom: 0; }
.contact-list .icon { width: 42px; height: 42px; margin: 0; flex: 0 0 auto; }
.contact-list .icon svg { width: 20px; height: 20px; }
.contact-list strong { display: block; color: var(--ink); font-size: 14px; }

.form { display: grid; gap: 16px; }
.form label { display: block; font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.form input, .form textarea, .form select {
  width: 100%; padding: 11px 14px; font: inherit; font-size: 14px; color: var(--ink);
  border: 1px solid #ddd; background: #fff; border-radius: 0;
}
.form input:focus, .form textarea:focus, .form select:focus { outline: 2px solid var(--red); outline-offset: -1px; border-color: var(--red); }
.form textarea { min-height: 150px; resize: vertical; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { font-size: 12px; color: var(--muted); margin: 0; }

/* ---------- Footer + socket ---------- */

.footer { background: var(--footer); color: #999; padding: 55px 0 35px; font-size: 14px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer a { color: #bbb; }
.footer a:hover { color: #fff; }
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 6px; }
.footer .logo-white { width: 150px; margin-bottom: 14px; }

.socket { background: var(--socket); color: var(--socket-text); font-size: 13px; border-top: 1px solid #444; }
.socket .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 52px; gap: 16px; flex-wrap: wrap; }
.socket a { color: var(--socket-text); }
.social { display: flex; gap: 2px; list-style: none; margin: 0; padding: 0; }
.social a {
  display: grid; place-items: center; width: 34px; height: 34px; color: #ccc;
  transition: background .2s, color .2s;
}
.social a:hover { background: var(--red); color: #fff; }
.social svg { width: 16px; height: 16px; }

.to-top {
  position: fixed; left: 20px; bottom: 20px; z-index: 40;
  width: 42px; height: 42px; display: grid; place-items: center;
  background: rgba(0,0,0,.5); color: #fff;
  opacity: 0; pointer-events: none; transition: opacity .3s, background .2s;
}
.to-top.is-visible { opacity: 1; pointer-events: auto; }
.to-top:hover { background: var(--red); color: #fff; }

/* ---------- Responsive ---------- */

@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .s1 .m-echo { left: 120px; }
  .s1 .m-proj { left: 330px; }
  .s2 .m-sketch { width: 460px; }
}

@media (max-width: 900px) {
  .wrap { padding: 0 24px; }
  .nav-toggle { display: block; }
  .nav {
    position: absolute; top: 100%; right: 0; left: 0; height: auto;
    background: #fff; border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-open .nav { display: block; }
  .nav ul { flex-direction: column; height: auto; }
  .nav a { height: auto; padding: 14px 24px; border-top: 0; border-right: 3px solid transparent; border-bottom: 1px solid #f0f0f0; }
  .nav a[aria-current="page"] { border-right-color: var(--red); }

  .split, .grid-3 { grid-template-columns: 1fr; gap: 30px; }
  .split--flip .split-media { order: 0; }
  .slide-media { display: none; }
  .slide-inner { justify-content: center; padding: 0 24px; }
  .slide-text { align-items: center; text-align: center; }
  .slider { height: 400px; }
}

@media (max-width: 600px) {
  :root { --header-h: 70px; }
  body { font-size: 14px; }
  h1 { font-size: 24px; }
  h2 { font-size: 20px; }
  .wrap { padding: 0 16px; }
  .grid-2, .grid-4, .form .row { grid-template-columns: 1fr; }
  .section { padding: 50px 0; }
  .slider { height: 340px; }
  .s1 .logo-white, .s1 .believe { width: 230px; }
  .slide-title { font-size: 26px; }
  .tab { min-width: 180px; font-size: 15px; }
  .logo-squares { display: none; }
  .page-banner { height: 160px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .slide, .slide.is-active { transition: none; }
  .slide.is-active .layer { animation: none; opacity: 1; }
}