:root {
      --bg:         #0e0e0e;
      --bg2:        #161616;
      --card-gray:  #d4d4d4;
      --card-white: #ffffff;
      --border:     #2a2a2a;
      --border-inp: #383838;
      --text:       #ffffff;
      --muted:      #999999;
      --cyan:       #00bcd4;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); }

    /* Visible focus ring for keyboard users (WCAG 2.4.7) */
    :focus-visible {
      outline: 2px solid var(--cyan);
      outline-offset: 3px;
      border-radius: 4px;
    }
    /* Don't show the ring on mouse clicks */
    :focus:not(:focus-visible) { outline: none; }

    /* Respect reduced-motion preference (WCAG 2.3.3) */
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
        scroll-behavior: auto !important;
      }
    }

    /* Skip-to-content link for keyboard users */
    .skip-link {
      position: absolute; left: -9999px; top: 0;
      background: var(--cyan); color: #000;
      padding: 10px 16px; font-weight: 600; font-size: 14px;
      z-index: 200; border-radius: 6px;
    }
    .skip-link:focus { left: 10px; top: 10px; }

    /* grid + diagonal pattern */
    .pattern {
      background-color: var(--bg);
      background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px),
        repeating-linear-gradient(-45deg, transparent, transparent 58px, rgba(255,255,255,0.012) 58px, rgba(255,255,255,0.012) 59px);
      background-size: 80px 80px, 80px 80px, auto;
    }

    /* NAV */
    nav {
      position: sticky; top: 0; z-index: 100;
      background: rgba(14,14,14,0.94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--border);
    }
    .nav-wrap {
      max-width: 1180px; margin: 0 auto; padding: 0 24px;
      height: 62px; display: flex; align-items: center; justify-content: space-between;
    }
    .logo { display: flex; align-items: center; gap: 8px; text-decoration: none; }
    .logo img { height: 32px; width: auto; display: block; }
    .beta-tag { background: var(--cyan); color: #000; font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 20px; letter-spacing: .06em; }
    .nav-links { display: flex; align-items: center; gap: 28px; }
    .nav-links a { color: #bbb; font-size: 14px; font-weight: 500; text-decoration: none; transition: color .18s; }
    .nav-links a:hover { color: #fff; }
    /* Nav CTA demoted to secondary — hero "Get Started" is the primary action */
    .nav-cta {
      background: transparent !important; color: #fff !important;
      padding: 7px 18px !important; border-radius: 6px;
      font-weight: 600 !important;
      border: 1px solid var(--border-inp);
      transition: border-color .18s, background .18s;
    }
    .nav-cta:hover { background: rgba(255,255,255,.06); border-color: #555; }
    #hbg { display: none; background: none; border: none; cursor: pointer; color: #fff; padding: 6px; }
    #mob-menu { display: none; flex-direction: column; gap: 14px; padding: 18px 24px; border-top: 1px solid var(--border); background: var(--bg); }
    #mob-menu a { color: #ccc; text-decoration: none; font-size: 15px; font-weight: 500; }

    /* HERO */
    .hero { min-height: calc(100vh - 62px); display: flex; align-items: center; }
    .hero-inner {
      max-width: 1180px; margin: 0 auto; padding: 80px 24px;
      display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
    }
    .hero h1 { font-size: clamp(34px,4.5vw,56px); font-weight: 800; line-height: 1.1; margin-bottom: 18px; }
    .hero .sub { font-size: 16px; font-weight: 600; color: #ccc; margin-bottom: 18px; }
    .hero .body { font-size: 14.5px; line-height: 1.8; color: var(--muted); margin-bottom: 36px; }
    .btn-white {
      display: inline-block; background: #fff; color: #000;
      font-weight: 700; font-size: 15px; padding: 13px 32px;
      border-radius: 7px; text-decoration: none; transition: background .18s;
    }
    .btn-white:hover { background: #ddd; }
    .hero-phones { display: flex; justify-content: center; align-items: center; }
    .hero-phones img {
      max-width: 100%; height: auto; max-height: 560px;
      filter: drop-shadow(0 28px 60px rgba(0,0,0,0.7));
      border-radius: 12px;
    }

    /* SECTIONS */
    .sec { padding: 80px 24px; }
    .sec-inner { max-width: 1180px; margin: 0 auto; }
    .sec-title { font-size: clamp(22px,3vw,34px); font-weight: 700; text-align: center; margin-bottom: 48px; }

    /* PRODUCT DESIGNS */
    .pd-header { text-align: center; margin-bottom: 36px; }
    .pd-header p { color: var(--muted); font-size: 15px; margin-top: 10px; max-width: 600px; margin-left: auto; margin-right: auto; }

    /* Main featured image */
    .pd-main {
      display: flex; justify-content: center; align-items: center;
      margin-bottom: 28px; min-height: 520px;
    }
    .pd-main img {
      max-height: 520px; width: auto; max-width: 100%;
      border-radius: 24px;
      filter: drop-shadow(0 20px 60px rgba(0,0,0,0.7));
      transition: opacity .25s ease;
    }

    /* Thumbnail strip */
    .pd-strip {
      display: flex; justify-content: center; align-items: flex-end;
      gap: 14px; flex-wrap: wrap;
    }
    /* Reset button defaults so <button class="pd-thumb"> looks identical to the old <div> */
    button.pd-thumb { background: transparent; padding: 0; font: inherit; }
    .pd-thumb {
      cursor: pointer; border-radius: 14px; overflow: hidden;
      border: 2px solid transparent;
      transition: border-color .2s, transform .2s, opacity .2s;
      opacity: 0.5; flex-shrink: 0;
    }
    .pd-thumb:hover { opacity: 0.8; transform: translateY(-4px); }
    .pd-thumb.active { border-color: var(--cyan); opacity: 1; transform: translateY(-6px); }
    .pd-thumb img { height: 110px; width: auto; display: block; }

    /* caption bar */
    .pd-caption {
      text-align: center; margin-top: 28px;
      padding: 20px 30px; background: rgba(0,0,0,.35);
      border: 1px solid #2a2a2a; border-radius: 12px;
      max-width: 700px; margin-left: auto; margin-right: auto;
    }
    .pd-caption h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
    .pd-caption p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

    /* DISCOVER */
    .disc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
    .disc-left { text-align: center; }
    .disc-left h2 { font-size: 26px; font-weight: 700; margin-bottom: 6px; }
    .disc-left p { color: var(--muted); font-size: 14px; margin-bottom: 28px; }
    .demo-video-wrap {
      width: 100%; max-width: 280px; margin: 0 auto;
      border-radius: 28px; overflow: hidden;
      box-shadow: 0 24px 64px rgba(0,0,0,0.65);
      background: #000;
    }
    .demo-video-wrap video { width: 100%; height: auto; display: block; border-radius: 28px; }

    /* ACCORDION */
    .acc-list { display: flex; flex-direction: column; gap: 10px; }
    .acc-item { border: 1px solid #2e2e2e; border-radius: 8px; overflow: hidden; }
    .acc-btn {
      width: 100%; background: rgba(255,255,255,.03); border: none; color: #fff;
      padding: 15px 18px; text-align: left; font-size: 14.5px; font-weight: 500;
      cursor: pointer; display: flex; align-items: center; gap: 10px;
      transition: background .18s; font-family: inherit;
    }
    .acc-btn:hover { background: rgba(255,255,255,.06); }
    .acc-chev { color: var(--muted); font-size: 15px; transition: transform .25s; flex-shrink: 0; }
    .acc-chev.open { transform: rotate(180deg); }
    .acc-body {
      display: none; padding: 14px 18px 18px 38px;
      font-size: 13.5px; color: var(--muted); line-height: 1.75;
      border-top: 1px solid #1e1e1e;
    }
    .acc-body.open { display: block; }

    /* FEATURES */
    .feat-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .feat-card {
      background: var(--card-gray); border-radius: 16px;
      padding: 30px 22px; text-align: center;
    }
    .feat-card.white { background: var(--card-white); }
    .feat-icon { font-size: 28px; margin-bottom: 14px; display: block; }
    .feat-card h3 { font-size: 15px; font-weight: 700; color: #111; margin-bottom: 14px; }
    .feat-card p  { font-size: 13.5px; color: #444; line-height: 1.68; }

    /* FORM */
    .form-grid {
      max-width: 1100px; margin: 0 auto; padding: 80px 24px;
      display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: center;
    }
    .form-ph-wrap { display: flex; justify-content: center; }
    .form-ph-wrap img { max-width: 280px; height: auto; filter: drop-shadow(0 18px 50px rgba(0,0,0,0.6)); border-radius: 20px; }
    .form-box h2 { font-size: 26px; font-weight: 700; margin-bottom: 28px; }
    .fg { margin-bottom: 18px; }
    .fl { display: block; font-size: 13.5px; font-weight: 500; color: #ccc; margin-bottom: 7px; }
    .fl span { color: #e53e3e; }
    .fi {
      width: 100%; background: #0d0d0d; border: 1px solid var(--border-inp);
      border-radius: 6px; padding: 11px 13px; color: #fff;
      font-size: 14px; font-family: inherit; outline: none; transition: border-color .2s;
    }
    .fi:focus { border-color: #555; }
    textarea.fi { min-height: 115px; resize: vertical; }
    .radio-col { display: flex; flex-direction: column; gap: 8px; }
    .radio-row { display: flex; align-items: center; gap: 9px; font-size: 13.5px; color: #ccc; cursor: pointer; }
    .radio-row input { accent-color: var(--cyan); width: 15px; height: 15px; cursor: pointer; }
    .radio-inline { display: flex; gap: 20px; flex-wrap: wrap; }
    /* Fieldsets for radio groups — no visible border, legend styled as label */
    .fieldset { border: none; padding: 0; margin-bottom: 18px; }
    .fieldset legend { padding: 0; }
    .optional { color: var(--muted); font-size: 12.5px; font-style: normal; font-weight: 400; margin-left: 4px; }
    .form-note {
      font-size: 12.5px; color: var(--muted); line-height: 1.6;
      margin: 0 0 16px;
    }
    .btn-sub {
      background: #d4d4d4; color: #111; border: none; border-radius: 6px;
      padding: 11px 30px; font-size: 14.5px; font-weight: 600;
      cursor: pointer; font-family: inherit; transition: background .18s;
    }
    .btn-sub:hover { background: #bbb; }
    .form-ok {
      display: none; margin-top: 12px; background: rgba(0,188,212,.1);
      border: 1px solid var(--cyan); color: var(--cyan);
      border-radius: 6px; padding: 11px 14px; font-size: 13.5px;
    }

    /* FAQ */
    .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
    .faq-item {
      border: 1px solid #252525; border-radius: 10px;
      overflow: hidden; background: rgba(255,255,255,.02);
    }
    .faq-btn {
      width: 100%; background: none; border: none; color: #fff;
      padding: 17px 20px; text-align: left; font-size: 14.5px; font-weight: 500;
      cursor: pointer; display: flex; justify-content: space-between;
      align-items: center; gap: 14px; font-family: inherit; transition: background .18s;
    }
    .faq-btn:hover { background: rgba(255,255,255,.04); }
    .faq-ico { color: #555; font-size: 20px; flex-shrink: 0; transition: transform .2s, color .2s; line-height: 1; }
    .faq-ico.open { transform: rotate(45deg); color: var(--cyan); }
    .faq-ans {
      display: none; padding: 4px 20px 17px; font-size: 13.5px;
      color: var(--muted); line-height: 1.75;
      border-top: 1px solid #1c1c1c;
    }
    .faq-ans.open { display: block; }

    /* FOOTER */
    footer { background: #0a0a0a; border-top: 1px solid #1a1a1a; padding: 36px 24px; }
    .ft-inner {
      max-width: 1180px; margin: 0 auto;
      display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 18px;
    }
    .ft-logo img { height: 28px; width: auto; }
    .ft-links { display: flex; gap: 24px; }
    /* Contrast: #555 on #0a0a0a is 2.8:1 (fails AA). #a0a0a0 = 6.1:1 passes AA */
    .ft-links a { color: #a0a0a0; font-size: 13.5px; text-decoration: none; transition: color .18s; }
    .ft-links a:hover { color: #fff; }
    /* Contrast: #3a3a3a on #0a0a0a is 1.8:1 (fails all). #8a8a8a = 4.7:1 passes AA */
    .ft-copy { color: #8a8a8a; font-size: 12.5px; }

    /* NOTICE */
    .notice-banner { background: #161616; border-bottom: 1px solid #222; padding: 10px 24px; text-align: right; }
    /* Contrast: #777 on #161616 is 3.4:1 (fails AA normal). #a0a0a0 = 5.8:1 passes */
    .notice-banner span { font-size: 12px; color: #a0a0a0; }
    .notice-banner strong { color: #fff; }

    /* RESPONSIVE */
    @media (max-width: 880px) {
      .hero-inner, .disc-grid { grid-template-columns: 1fr; }
      .hero-inner { text-align: center; }
      .hero-phones { margin-top: 16px; }
      .feat-grid { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-ph-wrap { display: none; }
      #hbg { display: block; }
      .nav-links { display: none; }
      .pd-main img { max-height: 420px; }
      .pd-thumb img { height: 85px; }
    }
    @media (max-width: 540px) {
      .feat-grid { grid-template-columns: 1fr; }
      .pd-main img { max-height: 340px; }
      .pd-thumb img { height: 68px; }
      .pd-strip { gap: 8px; }
    }