/* ============================================================
   DeltaML design tokens
   ============================================================ */
:root {
  --dml-teal-500: #44E5BF;
  --dml-teal-400: #54BBA6;
  --dml-deep-900: #031F1A;
  --dml-deep-700: #075246;
  --dml-warn:     #F5B94A;
  --dml-anomaly:  #FF5A5F;

  /* Dark mode — site default */
  --dml-dark-bg:   #04100D;
  --dml-dark-bg-2: #081A16;
  --dml-dark-bg-3: #0D241E;
  --dml-dark-line: #12342C;
  --dml-dark-fg:   #E9F4F0;
  --dml-dark-fg-2: #9FB4AE;
  --dml-dark-fg-3: #5C7972;

  --bg-page:   var(--dml-dark-bg);
  --bg-page-2: var(--dml-dark-bg-2);
  --bg-page-3: var(--dml-dark-bg-3);
  --fg-page:   var(--dml-dark-fg);
  --fg-page-2: var(--dml-dark-fg-2);
  --fg-page-3: var(--dml-dark-fg-3);
  --line-page: var(--dml-dark-line);
  --teal:      var(--dml-teal-500);
  --glow-strength: 0.22;

  --font-display: 'DM Sans', 'Helvetica Neue', Helvetica, Arial, system-ui, sans-serif;
  --font-body:    'Roboto', 'DM Sans', system-ui, Arial, sans-serif;
  --font-mono:    'Fragment Mono', 'Source Code Pro', ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease-out: cubic-bezier(.16, .84, .30, 1);
}

/* ============================================================
   Reset + base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-page);
  color: var(--fg-page);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

/* Anchor targets must clear the sticky nav (~60px) when scrolled to */
#product, #how, #engage, #team { scroll-margin-top: 80px; }
img { max-width: 100%; display: block; }
button { font: inherit; }
a { color: var(--teal); text-decoration: none; transition: opacity .15s var(--ease-out); }
a:hover { opacity: 0.75; }

/* ============================================================
   Layout containers
   ============================================================ */
.container { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
.container-narrow { max-width: 920px; margin: 0 auto; padding: 0 32px; }

/* ============================================================
   Top nav
   ============================================================ */
.top-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 32px;
  background: rgba(4, 16, 13, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-page);
}
.top-nav .brand { display: flex; align-items: center; gap: 12px; }
.top-nav .brand img { height: 22px; }
.top-nav .links { display: flex; gap: 28px; align-items: center; font-size: 14px; }
.top-nav .links a { color: var(--fg-page); cursor: pointer; }

/* Hamburger toggle (mobile only) */
.nav-toggle {
  display: none;
  background: transparent; border: none; cursor: pointer;
  width: 36px; height: 36px; padding: 8px;
  flex-direction: column; justify-content: center; align-items: center; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--fg-page);
  transition: transform .25s var(--ease-out), opacity .15s;
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }

  .top-nav.is-open .links {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    gap: 0;
    padding: 8px 24px 20px;
    background: rgba(8, 26, 22, 0.96);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line-page);
  }
  .top-nav.is-open .links a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line-page);
  }
  .top-nav.is-open .links a:last-of-type { border-bottom: none; }
  .top-nav.is-open .links button {
    margin-top: 14px;
    justify-content: center;
  }

  /* Hamburger → X when open */
  .top-nav.is-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .top-nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .top-nav.is-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-weight: 500; font-size: 14px;
  padding: 12px 22px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background .18s var(--ease-out), opacity .18s, transform .12s, color .18s;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--teal); color: var(--dml-deep-900); border: none; }
.btn-primary:hover { background: #6CEDCC; }
.btn-ghost { background: transparent; color: var(--fg-page); border-color: var(--fg-page); }
.btn-ghost:hover { background: var(--fg-page); color: var(--bg-page); }
.btn-chamfer {
  background: var(--teal); color: var(--dml-deep-900); border: none;
  padding: 14px 28px; font-size: 14px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}
.btn-chamfer:hover { background: #6CEDCC; }

/* ============================================================
   Eyebrow rail
   ============================================================ */
.eyebrow-rail {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teal);
  display: inline-flex; align-items: center; gap: 12px;
}
.eyebrow-rail::before {
  content: ''; display: inline-block; width: 28px; height: 1px; background: var(--teal);
}

/* ============================================================
   Section blocks
   ============================================================ */
section.block { padding: 110px 0; border-top: 1px solid var(--line-page); }
section.block .head { margin-bottom: 56px; }
section.block .head .eyebrow-rail { margin-bottom: 14px; }
section.block h2 {
  font-family: var(--font-display); font-weight: 500;
  font-size: clamp(36px, 4.8vw, 60px); line-height: 1.02; letter-spacing: -0.035em;
  color: var(--fg-page); margin: 0 0 14px; max-width: 880px;
}
section.block h2 em { color: var(--teal); font-style: normal; }
section.block h2 s {
  color: var(--fg-page-3);
  font-size: 0.72em;
  font-weight: 400;
  opacity: 0.55;
  text-decoration-thickness: 0.05em;
  margin-right: 0.1em;
  vertical-align: 0.1em;
}
section.block .head p {
  font-size: 18px; line-height: 1.55;
  color: var(--fg-page-2); max-width: 720px; margin: 0;
}

/* ============================================================
   Footer
   ============================================================ */
.footer { padding: 64px 32px 32px; border-top: 1px solid var(--line-page); background: var(--bg-page); }
.footer .inner { max-width: 1240px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; }
.footer img { height: 22px; }
.footer .tagline { font-size: 14px; color: var(--fg-page-2); margin-top: 18px; max-width: 320px; line-height: 1.55; }
.footer h5 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--teal); margin: 0 0 16px; font-weight: 400; }
.footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer li { font-size: 14px; color: var(--fg-page); cursor: pointer; }
.footer li:hover { color: var(--teal); }
.footer .copy {
  border-top: 1px solid var(--line-page); margin: 48px auto 0; padding-top: 22px;
  max-width: 1240px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--fg-page-3); display: flex; justify-content: space-between;
}