:root {
    color-scheme: light;

    --ink: #0B0D10;
    --graphite: #1A1D23;
    --neon: #46B9FF;
    --cyan: #65EBFD;
    --deep: #0A7CD1;
    --silver: #CECFD2;

    --paper: #FBFCFD;
    --card: #FFFFFF;
    --text: #23292F;
    --soft: #5C6672;
    --faint: #8A939F;
    --line: #E3E8EF;
    --line-soft: #EFF3F7;
    --tint: #F3F8FD;

    --display: 'Audiowide', 'Trebuchet MS', sans-serif;
    --body: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --logo-dark: url("logo-dark.png");
    --logo-light: url("logo-light.png");
  }

  * { box-sizing: border-box; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--text);
    font-family: var(--body);
    font-size: 15px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
  }

  .wrap {
    max-width: 1140px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* ---------- nav ---------- */

  header.site {
    background: var(--card);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: env(safe-area-inset-top, 0px);
    z-index: 50;
  }

  .nav {
    display: flex;
    align-items: center;
    gap: 20px;
    padding-block: 18px;
    flex-wrap: wrap;
  }

  .brand {
    width: 172px;
    height: 46px;
    background-image: var(--logo-light);
    background-size: contain;
    background-repeat: no-repeat;
    background-position: left center;
    background-color: transparent;
    flex: none;
    border: none;
    padding: 0;
    cursor: pointer;
  }

  .nav-links {
    display: flex;
    gap: 22px;
    margin-left: auto;
    flex-wrap: wrap;
  }

  .nav-links button {
    background: none;
    border: none;
    font-family: var(--body);
    font-size: 13.5px;
    font-weight: 500;
    color: var(--soft);
    cursor: pointer;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
    transition: color .15s, border-color .15s;
  }

  .nav-links button:hover { color: var(--deep); }
  .nav-links button[aria-current="page"] {
    color: var(--ink);
    border-bottom-color: var(--neon);
  }

  .lang {
    display: flex;
    align-items: center;
    border: 1px solid var(--line);
    border-radius: 4px;
    overflow: hidden;
    flex: none;
  }

  .lang button {
    background: none;
    border: none;
    font-family: var(--display);
    font-size: 10.5px;
    letter-spacing: 0.06em;
    padding: 7px 10px;
    color: var(--faint);
    cursor: pointer;
  }

  .lang button[aria-pressed="true"] {
    background: var(--ink);
    color: var(--neon);
  }

  .nav .cta {
    flex: none;
    background: var(--deep);
    color: #fff;
    border: none;
    font-family: var(--body);
    font-weight: 600;
    font-size: 13px;
    padding: 9px 17px;
    border-radius: 4px;
    cursor: pointer;
    transition: background .15s;
  }
  .nav .cta:hover { background: var(--ink); }

  /* ---------- generic section ---------- */

  section.band { padding-block: 74px; }
  section.band.tight { padding-block: 52px; }

  .dark {
    background: var(--ink);
    color: var(--silver);
  }

  .eyebrow {
    font-family: var(--display);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--deep);
    margin-bottom: 9px;
  }
  .dark .eyebrow { color: var(--neon); }

  h1 {
    font-family: var(--display);
    font-size: clamp(30px, 5.2vw, 52px);
    line-height: 1.13;
    margin: 0 0 18px;
    color: #fff;
    text-wrap: balance;
    max-width: 17ch;
  }

  h2 {
    font-family: var(--display);
    font-size: clamp(22px, 3.3vw, 31px);
    line-height: 1.25;
    margin: 0 0 8px;
    color: var(--ink);
    font-weight: 400;
    text-wrap: balance;
  }
  .dark h2 { color: #fff; }

  .rule {
    width: 40px;
    height: 3px;
    background: var(--neon);
    margin-bottom: 26px;
  }

  h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 8px;
  }
  .dark h3 { color: #fff; }

  p { margin: 0 0 15px; max-width: 64ch; }
  .dark p { color: var(--silver); }

  .lead { font-size: 17px; color: var(--soft); max-width: 58ch; }
  .dark .lead { color: var(--silver); }

  /* ---------- hero ---------- */

  .hero {
    background: var(--ink);
    padding-block: 96px 88px;
    position: relative;
    overflow: hidden;
  }

  .hero::after {
    content: "";
    position: absolute;
    right: -180px;
    top: -140px;
    width: 620px;
    height: 620px;
    background: radial-gradient(circle, rgba(70,185,255,0.13), transparent 68%);
    pointer-events: none;
  }

  .hero .wrap { position: relative; z-index: 1; }

  .hero .kicker {
    font-family: var(--display);
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--neon);
    margin-bottom: 20px;
  }

  .hero p { max-width: 54ch; font-size: 17px; color: var(--silver); }

  .btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 30px; }

  .btn {
    font-family: var(--body);
    font-weight: 600;
    font-size: 14px;
    padding: 13px 26px;
    border-radius: 4px;
    border: 2px solid var(--neon);
    background: var(--neon);
    color: var(--ink);
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: background .15s, color .15s;
  }
  .btn:hover { background: var(--cyan); border-color: var(--cyan); }

  .btn.ghost { background: transparent; color: var(--neon); }
  .btn.ghost:hover { background: rgba(70,185,255,0.12); color: var(--cyan); }

  .btn.solid-dark {
    background: var(--ink); border-color: var(--ink); color: #fff;
  }
  .btn.solid-dark:hover { background: var(--deep); border-color: var(--deep); }

  /* ---------- capability cards ---------- */

  .cap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 26px;
    margin-top: 40px;
  }

  .cap {
    background: var(--card);
    border: 1px solid var(--line);
    border-top: 3px solid var(--neon);
    border-radius: 5px;
    padding: 28px 24px 26px;
  }

  .cap .num {
    font-family: var(--display);
    font-size: 13px;
    color: var(--deep);
    letter-spacing: 0.08em;
    margin-bottom: 12px;
  }

  .cap h3 { font-family: var(--display); font-weight: 400; font-size: 19px; }

  .cap p { font-size: 14px; color: var(--soft); margin-bottom: 14px; }

  .cap ul {
    margin: 0; padding: 0; list-style: none;
    border-top: 1px solid var(--line-soft);
    padding-top: 13px;
  }
  .cap li {
    font-size: 12.5px;
    color: var(--faint);
    padding: 3px 0 3px 14px;
    position: relative;
  }
  .cap li::before {
    content: "";
    position: absolute; left: 0; top: 11px;
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--neon);
  }

  /* ---------- product card ---------- */

  .product {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 6px;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    margin-top: 36px;
  }

  .product-body { padding: 36px 34px; }

  .product-body .tagname {
    font-family: var(--display);
    font-size: 25px;
    color: var(--ink);
    margin-bottom: 4px;
  }

  .product-body .role {
    font-size: 11.5px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--deep);
    margin-bottom: 16px;
  }

  .product-body p { font-size: 14.5px; }

  .prod-points {
    display: flex; flex-wrap: wrap; gap: 8px;
    margin: 18px 0 22px;
  }
  .prod-points span {
    font-size: 12px;
    background: var(--tint);
    border: 1px solid #D8E7F6;
    color: var(--deep);
    padding: 5px 11px;
    border-radius: 3px;
  }

  .product-visual {
    background: var(--ink);
    display: flex; align-items: center; justify-content: center;
    padding: 30px;
  }
  .product-visual svg { width: 100%; max-width: 280px; height: auto; }

  .next-up {
    margin-top: 26px;
    border: 1px dashed var(--line);
    border-radius: 5px;
    padding: 20px 22px;
    background: var(--card);
  }
  .next-up .role {
    font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase;
    color: var(--faint); margin-bottom: 6px;
  }
  .next-up h3 { font-size: 15px; }
  .next-up p { font-size: 13.5px; color: var(--soft); margin: 0; }

  /* ---------- phases ---------- */

  .phases {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(205px, 1fr));
    gap: 0;
    margin-top: 38px;
    border-top: 2px solid var(--line);
  }

  .phase {
    padding: 24px 22px 26px 0;
    border-right: 1px solid var(--line-soft);
    position: relative;
  }
  .phase:last-child { border-right: none; }
  .phase::before {
    content: "";
    position: absolute; top: -2px; left: 0;
    width: 46px; height: 2px; background: var(--neon);
  }

  .phase .pn {
    font-family: var(--display);
    font-size: 12px; color: var(--deep);
    letter-spacing: 0.1em; margin-bottom: 9px;
  }
  .phase h3 { font-size: 15.5px; margin-bottom: 6px; }
  .phase p { font-size: 13.5px; color: var(--soft); margin: 0; }

  /* ---------- deliverables ---------- */

  .deliv {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 30px;
    margin-top: 34px;
  }
  .deliv h4 {
    font-family: var(--display);
    font-size: 13px; font-weight: 400;
    color: var(--neon);
    letter-spacing: 0.07em;
    margin: 0 0 12px;
    padding-bottom: 9px;
    border-bottom: 1px solid rgba(206,207,210,0.22);
  }
  .deliv ul { margin: 0; padding: 0; list-style: none; }
  .deliv li {
    font-size: 13.5px; color: var(--silver);
    padding: 5px 0 5px 15px; position: relative;
  }
  .deliv li::before {
    content: "—"; position: absolute; left: 0; color: var(--deep);
  }

  /* ---------- contact / forms ---------- */

  .split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 46px;
    margin-top: 34px;
    align-items: start;
  }

  form { display: flex; flex-direction: column; gap: 14px; }

  label {
    font-size: 11.5px; letter-spacing: 0.09em; text-transform: uppercase;
    color: var(--faint); font-weight: 600; display: block; margin-bottom: 5px;
  }

  input, select, textarea {
    width: 100%;
    font-family: var(--body);
    font-size: 14px;
    color: var(--text);
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 10px 12px;
  }
  input:focus, select:focus, textarea:focus {
    outline: 2px solid var(--neon); outline-offset: 1px; border-color: transparent;
  }
  textarea { min-height: 104px; resize: vertical; }

  .form-note {
    font-size: 12.5px; color: var(--faint); margin: 0;
  }

  .sent {
    background: var(--tint);
    border-left: 3px solid var(--neon);
    padding: 13px 16px;
    font-size: 13.5px;
    border-radius: 0 4px 4px 0;
  }

  .contact-block { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 4px; }
  .contact-block:first-child { border-top: none; padding-top: 0; margin-top: 0; }
  .contact-block .k {
    font-size: 11.5px; letter-spacing: 0.09em; text-transform: uppercase;
    color: var(--faint); margin-bottom: 3px;
  }
  .contact-block .v { font-size: 15px; font-weight: 600; color: var(--ink); }
  .contact-block .v.mail { color: var(--deep); user-select: all; }
  .contact-block .d { font-size: 13px; color: var(--soft); margin-top: 2px; }

  /* ---------- faq ---------- */

  .faq { margin-top: 30px; max-width: 74ch; }
  .faq details {
    border-bottom: 1px solid var(--line);
    padding: 15px 0;
  }
  .faq summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    color: var(--ink);
    list-style: none;
    display: flex;
    justify-content: space-between;
    gap: 16px;
  }
  .faq summary::-webkit-details-marker { display: none; }
  .faq summary::after {
    content: "+";
    font-family: var(--display);
    color: var(--deep);
    flex: none;
  }
  .faq details[open] summary::after { content: "–"; }
  .faq details p { margin: 11px 0 0; font-size: 14px; color: var(--soft); }

  .sla {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
    margin-top: 30px;
  }
  .sla div {
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 3px solid var(--neon);
    border-radius: 4px;
    padding: 16px 18px;
  }
  .sla .t {
    font-family: var(--display); font-size: 19px; color: var(--ink); margin-bottom: 3px;
  }
  .sla .s { font-size: 12.5px; color: var(--soft); }

  /* ---------- legal ---------- */

  .legal { max-width: 74ch; }
  .legal h3 { margin-top: 30px; font-size: 15.5px; }
  .legal p, .legal li { font-size: 14px; color: var(--soft); }
  .legal ul { padding-left: 20px; }
  .legal li { margin-bottom: 6px; }
  .legal li::marker { color: var(--neon); }

  .flag {
    background: #FFF8E6;
    border-left: 3px solid #E0A93B;
    padding: 14px 17px;
    border-radius: 0 4px 4px 0;
    font-size: 13.5px;
    color: #6B5320;
    margin-bottom: 26px;
    max-width: 74ch;
  }

  /* ---------- footer ---------- */

  footer.site {
    background: var(--graphite);
    color: var(--silver);
    padding-block: 46px 30px;
    margin-top: 0;
  }

  .foot-grid {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    justify-content: space-between;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(206,207,210,0.14);
  }

  .foot-brand { max-width: 300px; }
  .foot-logo {
    width: 186px; height: 50px;
    background-image: var(--logo-dark);
    background-size: contain; background-repeat: no-repeat;
    margin-bottom: 14px;
  }
  .foot-brand p { font-size: 13px; color: var(--faint); margin: 0; }

  .foot-col h5 {
    font-family: var(--display);
    font-size: 10.5px; letter-spacing: 0.13em; text-transform: uppercase;
    color: var(--neon); margin: 0 0 12px; font-weight: 400;
  }
  .foot-col button, .foot-col a {
    display: block; background: none; border: none; padding: 3px 0;
    font-family: var(--body); font-size: 13.5px; color: var(--silver);
    cursor: pointer; text-decoration: none; text-align: left;
  }
  .foot-col button:hover, .foot-col a:hover { color: var(--neon); }

  .foot-bottom {
    padding-top: 20px;
    display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
    font-size: 12px; color: var(--faint);
  }
  .foot-bottom .tag { font-family: var(--display); letter-spacing: 0.05em; }

  /* ---------- page switching ---------- */

  .page[hidden] { display: none !important; }

  /* ---------- responsive ---------- */

  @media (max-width: 860px) {
    .product { grid-template-columns: 1fr; }
    .product-visual { order: -1; padding: 24px; }
    .split { grid-template-columns: 1fr; gap: 32px; }
    .phase { border-right: none; border-bottom: 1px solid var(--line-soft); padding-right: 0; }
    .phase:last-child { border-bottom: none; }
  }

  @media (max-width: 620px) {
    .nav { gap: 12px; }
    .nav-links { order: 3; width: 100%; margin-left: 0; gap: 16px; }
    .nav .cta { margin-left: auto; }
    section.band { padding-block: 52px; }
    .hero { padding-block: 64px 58px; }
  }

  @media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
  }