:root {
      --bg: #f5f6f3;
      --bg-alt: #eceeea;
      --ink: #171b1f;
      --ink-soft: #4b545c;
      --line: #d9dcd8;
      --primary: #223b52;
      --primary-soft: #345876;
      --accent: #c07a2b;
      --accent-soft: #e7d2b3;
      --white: #ffffff;
      --radius: 2px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background: var(--bg);
      color: var(--ink);
      font-family: 'Vazirmatn', sans-serif;
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    .mono {
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      unicode-bidi: isolate;
    }

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

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

    .container {
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 28px;
    }

    /* ---------- Header ---------- */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(245, 246, 243, 0.92);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--line);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 28px;
      max-width: 1180px;
      margin: 0 auto;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 14px;
      background: rgba(245, 246, 243, 0.92);
    }

    .brand-mark {
      font-family: 'JetBrains Mono', monospace;
      font-weight: 700;
      font-size: 20px;
      letter-spacing: 1px;
      color: var(--white);
      background: var(--primary);
      padding: 6px 10px;
      border-radius: var(--radius);
      direction: ltr;
    }

    .brand-logo {
      height: 46px;
      width: auto;
      transition: transform .25s ease;
    }

    .brand:hover .brand-logo {
      transform: scale(1.05);
    }

    .brand-name {
      font-weight: 700;
      font-size: 17px;
    }

    .brand-name span {
      display: block;
      font-weight: 400;
      font-size: 12.5px;
      color: var(--ink-soft);
      margin-top: 2px;
    }

    nav ul {
      display: flex;
      gap: 34px;
      list-style: none;
    }

    nav a {
      font-size: 15px;
      font-weight: 500;
      color: var(--ink-soft);
      position: relative;
      padding: 4px 0;
      transition: color .2s ease;
    }

    nav a:hover {
      color: var(--primary);
    }

    nav a::after {
      content: '';
      position: absolute;
      right: 0;
      bottom: -2px;
      width: 0;
      height: 1.5px;
      background: var(--accent);
      transition: width .25s ease;
    }

    nav a:hover::after {
      width: 100%;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 22px;
    }

    .call-btn {
      display: flex;
      align-items: center;
      gap: 8px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 13.5px;
      font-weight: 600;
      border: 1px solid var(--primary);
      color: var(--primary);
      padding: 8px 14px;
      border-radius: var(--radius);
      direction: ltr;
      transition: background .2s ease, color .2s ease;
      white-space: nowrap;
    }

    .call-btn:hover {
      background: var(--primary);
      color: var(--white);
    }

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: var(--ink);
    }

    /* ---------- Hero ---------- */
    .hero {
      padding: 108px 0 88px;
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 60px;
      align-items: center;
    }

    .eyebrow {
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      display: inline-block;
      font-size: 12.5px;
      font-weight: 600;
      letter-spacing: 1.5px;
      color: var(--accent);
      border: 1px solid var(--accent-soft);
      background: #fbf4ea;
      padding: 6px 12px;
      border-radius: var(--radius);
      margin-bottom: 22px;
    }

    .hero h1 {
      font-size: clamp(32px, 4.4vw, 50px);
      font-weight: 800;
      line-height: 1.28;
      letter-spacing: -0.3px;
      color: var(--primary);
      margin-bottom: 22px;
    }

    .hero p.lead {
      font-size: 17px;
      color: var(--ink-soft);
      max-width: 52ch;
      margin-bottom: 34px;
    }

    .hero-cta {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 13px 26px;
      border-radius: var(--radius);
      font-weight: 600;
      font-size: 14.5px;
      transition: all .2s ease;
    }

    .btn-primary {
      background: var(--primary);
      color: var(--white);
    }

    .btn-primary:hover {
      background: var(--primary-soft);
    }

    .btn-ghost {
      border: 1px solid var(--line);
      color: var(--ink);
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .hero-panel {
      border: 1px solid var(--line);
      background: var(--white);
      padding: 26px;
      border-radius: var(--radius);
    }

    .hero-panel-title {
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px;
      letter-spacing: 1px;
      color: var(--ink-soft);
      direction: ltr;
      text-align: left;
      margin-bottom: 16px;
      border-bottom: 1px solid var(--line);
      padding-bottom: 12px;
    }

    .flow {
      display: flex;
      flex-direction: column;
    }

    .flow-item {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      padding: 15px 0;
      border-bottom: 1px dashed var(--line);
    }

    .flow-item:last-child {
      border-bottom: none;
    }

    .flow-item .label {
      font-weight: 600;
      font-size: 15px;
    }

    .flow-item .code {
      font-family: 'JetBrains Mono', monospace;
      font-size: 12.5px;
      color: var(--accent);
      direction: ltr;
    }

    /* ---------- Section shells ---------- */
    section {
      padding: 76px 0;
      scroll-margin-top: 84px;
    }

    .section-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      margin-bottom: 44px;
      flex-wrap: wrap;
      gap: 16px;
      border-bottom: 1px solid var(--line);
      padding-bottom: 22px;
    }

    .section-head h2 {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
    }

    .section-head .tag {
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      font-size: 12.5px;
      color: var(--ink-soft);
      letter-spacing: 1px;
    }

    #products {
      background: var(--bg-alt);
    }

    /* ---------- Category tabs ---------- */
    .cat-tabs {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 40px;
    }

    .cat-tab {
      font-size: 14px;
      font-weight: 600;
      padding: 9px 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--white);
      color: var(--ink-soft);
      cursor: pointer;
      transition: all .18s ease;
    }

    .cat-tab:hover {
      border-color: var(--primary-soft);
      color: var(--primary);
    }

    .cat-tab.active {
      background: var(--primary);
      color: var(--white);
      border-color: var(--primary);
    }

    .cat-block {
      display: none;
      animation: fadeIn .35s ease;
    }

    .cat-block.active {
      display: block;
    }

    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(6px);
      }

      to {
        opacity: 1;
        transform: none;
      }
    }

    .cat-desc {
      color: var(--ink-soft);
      font-size: 14.5px;
      margin-bottom: 26px;
      max-width: 65ch;
    }

    .element-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
      gap: 14px;
    }

    .element-card {
      position: relative;
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 16px 14px 14px;
      min-height: 118px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
      transition: border-color .2s ease, transform .2s ease;
    }

    .element-card:hover {
      border-color: var(--accent);
      transform: translateY(-3px);
    }

    .element-card::before {
      content: attr(data-code);
      position: absolute;
      left: -6px;
      bottom: -18px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 52px;
      font-weight: 700;
      color: var(--bg-alt);
      z-index: 0;
      direction: ltr;
    }

    .element-code {
      font-family: 'JetBrains Mono', monospace;
      font-weight: 700;
      font-size: 20px;
      color: var(--primary);
      direction: ltr;
      position: relative;
      z-index: 1;
    }

    .element-name {
      font-size: 12.5px;
      color: var(--ink-soft);
      position: relative;
      z-index: 1;
      margin-top: 10px;
    }

    /* ---------- About ---------- */
    .about-grid {
      display: grid;
      grid-template-columns: 0.9fr 1.1fr;
      gap: 56px;
      align-items: start;
    }

    .about-since {
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      text-align: left;
      border: 1px solid var(--line);
      padding: 24px;
      background: var(--white);
      border-radius: var(--radius);
    }

    .about-since .num {
      font-size: 44px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1;
    }

    .about-since .cap {
      font-size: 12px;
      color: var(--ink-soft);
      margin-top: 10px;
      letter-spacing: .5px;
    }

    .about-body p {
      color: var(--ink-soft);
      font-size: 16px;
      margin-bottom: 18px;
    }

    .pillars {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      margin-top: 22px;
    }

    .pillar {
      font-size: 13.5px;
      font-weight: 600;
      padding: 8px 14px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      color: var(--ink-soft);
      background: var(--white);
    }

    /* ---------- Contact ---------- */
    #contact {
      background: var(--bg-alt);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-card {
      background: var(--white);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 34px;
    }

    .contact-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 18px;
    }

    .contact-row {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 0;
      border-bottom: 1px dashed var(--line);
    }

    .contact-row:last-child {
      border-bottom: none;
    }

    .contact-row .k {
      font-size: 13px;
      color: var(--ink-soft);
      width: 90px;
      flex-shrink: 0;
    }

    .contact-row .v {
      font-weight: 600;
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      text-align: right;
      flex: 1;
    }

    .contact-note {
      color: var(--ink-soft);
      font-size: 14.5px;
      line-height: 1.9;
    }

    /* ---------- Footer ---------- */
    footer {
      padding: 30px 0;
      border-top: 1px solid var(--line);
    }

    .footer-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 13px;
      color: var(--ink-soft);
    }

    .footer-row .mono {
      color: var(--ink-soft);
    }

    .element-card {
      cursor: pointer;
    }

    /* ---------- Product modal ---------- */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(20, 25, 30, 0.55);
      display: none;
      align-items: center;
      justify-content: center;
      padding: 20px;
      z-index: 1000;
    }

    .modal-overlay.open {
      display: flex;
    }

    .modal-box {
      background: var(--white);
      border-radius: var(--radius);
      max-width: 620px;
      width: 100%;
      max-height: 86vh;
      overflow-y: auto;
      position: relative;
      animation: modalIn .22s ease;
    }

    @keyframes modalIn {
      from {
        opacity: 0;
        transform: translateY(10px) scale(.98);
      }

      to {
        opacity: 1;
        transform: none;
      }
    }

    .modal-close {
      position: absolute;
      top: 16px;
      left: 16px;
      width: 32px;
      height: 32px;
      border: 1px solid var(--line);
      background: var(--white);
      border-radius: var(--radius);
      font-size: 16px;
      color: var(--ink-soft);
      cursor: pointer;
      line-height: 1;
    }

    .modal-close:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .modal-image {
      background: var(--bg-alt);
      border-bottom: 1px solid var(--line);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 26px;
      overflow: hidden;
    }

    .modal-image svg {
      width: 108px;
      height: 108px;
    }

    .modal-image img {
      max-width: 100%;
      max-height: 260px;
      object-fit: contain;
      border-radius: var(--radius);
      animation: imgZoom .5s ease;
    }

    @keyframes imgZoom {
      from {
        opacity: 0;
        transform: scale(1.06);
      }

      to {
        opacity: 1;
        transform: scale(1);
      }
    }

    /* ---------- Reveal on scroll ---------- */
    .reveal {
      opacity: 0;
      transform: translateY(18px);
      transition: opacity .65s ease, transform .65s ease;
    }

    .reveal.in-view {
      opacity: 1;
      transform: none;
    }

    @media (prefers-reduced-motion: reduce) {
      .reveal {
        opacity: 1;
        transform: none;
        transition: none;
      }

      .hero-enter {
        opacity: 1 !important;
        transform: none !important;
        animation: none !important;
      }
    }

    /* ---------- Hero entrance ---------- */
    .hero-enter {
      opacity: 0;
      transform: translateY(14px);
      animation: heroEnter .7s ease forwards;
    }

    .hero-enter.d1 {
      animation-delay: .05s;
    }

    .hero-enter.d2 {
      animation-delay: .18s;
    }

    .hero-enter.d3 {
      animation-delay: .3s;
    }

    @keyframes heroEnter {
      to {
        opacity: 1;
        transform: none;
      }
    }

    .modal-head {
      padding: 24px 30px 22px;
      border-bottom: 1px solid var(--line);
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .modal-code {
      font-family: 'JetBrains Mono', monospace;
      font-weight: 800;
      font-size: 30px;
      color: var(--primary);
      direction: ltr;
      border: 1px solid var(--line);
      background: var(--bg-alt);
      padding: 10px 16px;
      border-radius: var(--radius);
    }

    .modal-head-text h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
    }

    .modal-head-text .en {
      font-family: 'JetBrains Mono', monospace;
      direction: ltr;
      font-size: 12.5px;
      color: var(--ink-soft);
      margin-top: 4px;
      display: inline-block;
    }

    .modal-body {
      padding: 24px 30px 30px;
    }

    .modal-body p {
      color: var(--ink-soft);
      font-size: 15px;
      margin-bottom: 20px;
    }

    .modal-cta {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    /* ---------- Responsive ---------- */
    @media (max-width: 860px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }

      .about-grid {
        grid-template-columns: 1fr;
      }

      .contact-grid {
        grid-template-columns: 1fr;
      }

      nav {
        position: fixed;
        inset: 64px 0 auto 0;
        background: var(--bg);
        border-bottom: 1px solid var(--line);
        padding: 10px 28px 20px;
        transform: translateY(-130%);
        transition: transform .25s ease;
      }

      nav.open {
        transform: translateY(40px);
          border-top: 1px solid var(--line);
      }

      #siteNav {
          z-index: -1;
      }

      nav ul {
        flex-direction: column;
        gap: 16px;
      }

      .menu-toggle {
        display: flex;
      }

      .nav-right .call-btn span.txt {
        display: none;
      }
    }

    .about-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 18px;
    }

    .company-name {
      font-family: 'Vazirmatn', sans-serif;
      direction: rtl;
    }

    .mt-22 {
      margin-top: 22px;
    }