/* The marketing site — /, /features, /pricing, /security, /how.

   Deliberately not app.css. The product's Nocturne system is tuned for dense
   operational screens: 15px body, 8px radii, hairline dividers, everything
   close together. A landing page has the opposite job, so it gets its own
   sheet rather than a pile of overrides fighting the app's defaults. The two
   share only the brand: the same green, the same mark, the same wordmark
   treatment. Nothing here is loaded by a signed-in screen.

   Structure: near-black ground with a fixed mesh glow and film grain, glass
   chrome, and every panel built as an outer shell holding an inner core so a
   card reads as a machined object rather than a rectangle with a border.
   --------------------------------------------------------------------------- */

:root {
  --bg: #050505;
  --ink: #ededf0;
  --ink-soft: #a7abb8;
  --ink-faint: #6f7383;

  /* Brand CI, 02 — the accent is WhatsApp's green, OKLCH hue 152, same ramp as
     the app. The marketing pages use three steps of it and no other hue. */
  --accent: oklch(0.766 0.176 152);
  --accent-soft: oklch(0.86 0.12 152);
  --accent-deep: oklch(0.44 0.098 152);
  --accent-ink: #04180c;

  /* Surfaces are alpha over the ground, never opaque greys — that is what lets
     the mesh glow behind them show through the chrome. */
  --shell: rgba(255, 255, 255, 0.035);
  --hair: rgba(255, 255, 255, 0.075);
  --hair-strong: rgba(255, 255, 255, 0.14);
  --core-top: rgba(23, 24, 29, 0.86);
  --core-bottom: rgba(9, 9, 11, 0.9);

  /* No Inter, no webfont, no third-party origin: the CSP is `font-src 'self'`
     and shipping a 200KB face to render eight headings is not a trade worth
     making. system-ui is SF Pro, Segoe or Roboto depending on where you are —
     all three are better than a fallback nobody chose. */
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, "Cascadia Mono", monospace;

  --page: 1180px;
  --gutter: clamp(20px, 4vw, 48px);
  --band: clamp(104px, 13vw, 184px);

  --r-shell: 30px;
  --r-core: 23px; /* concentric with --r-shell minus the 7px bezel */
  --r-pill: 999px;

  /* One easing curve for the whole site. Heavy at the start, settles at the
     end — motion with mass, not a linear slide. */
  --ease: cubic-bezier(0.32, 0.72, 0, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* The ground: two very low-chroma orbs, fixed, behind everything. They are what
   stops a near-black page from looking like an unloaded stylesheet. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(58vw 46vw at 12% -6%, oklch(0.44 0.098 152 / 0.3), transparent 62%),
    radial-gradient(44vw 40vw at 92% 18%, oklch(0.5 0.06 200 / 0.16), transparent 66%),
    radial-gradient(70vw 50vw at 50% 108%, oklch(0.44 0.098 152 / 0.14), transparent 68%);
}

/* Film grain, fixed and inert, so it never repaints with the scroll. The noise
   is an inline SVG turbulence — a data: URL, which the CSP already allows for
   images because the pairing QR is one. */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

main,
.site-foot {
  position: relative;
  z-index: 1;
}

/* ---------------------------------------------------------------------------
   Chrome — a floating glass island, detached from the top edge.
   --------------------------------------------------------------------------- */

.nav {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 4px;
  width: calc(var(--page) - 2 * var(--gutter));
  max-width: calc(100vw - 2 * var(--gutter));
  padding: 7px 7px 7px 18px;
  border-radius: var(--r-pill);
  background: rgba(10, 10, 12, 0.66);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  box-shadow:
    inset 0 0 0 1px var(--hair),
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    0 24px 48px -28px #000;
}

/* Lockup A — mark, then wordmark, one bar height between them. */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-right: auto;
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.035em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.brand img {
  width: 26px;
  height: 26px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-links a {
  padding: 9px 15px;
  border-radius: var(--r-pill);
  font-size: 14.5px;
  color: var(--ink-soft);
  text-decoration: none;
  transition:
    color 0.5s var(--ease),
    background-color 0.5s var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a[aria-current="page"] {
  color: var(--accent);
}

/* The hamburger is two bars that rotate into an X rather than swapping icons —
   the same two elements the whole way through, so the motion is continuous. */
.burger {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 0;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, 0.06);
  cursor: pointer;
}

.burger span {
  position: absolute;
  left: 12px;
  width: 18px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.6s var(--ease);
}

.burger span:first-child {
  transform: translateY(-4px);
}

.burger span:last-child {
  transform: translateY(4px);
}

.burger[aria-expanded="true"] span:first-child {
  transform: rotate(45deg);
}

.burger[aria-expanded="true"] span:last-child {
  transform: rotate(-45deg);
}

.menu {
  position: fixed;
  inset: 0;
  z-index: 35;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 0 var(--gutter);
  background: rgba(4, 4, 5, 0.86);
  backdrop-filter: blur(28px);
  -webkit-backdrop-filter: blur(28px);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.6s var(--ease),
    visibility 0.6s var(--ease);
}

.menu[data-open="true"] {
  opacity: 1;
  visibility: visible;
}

.menu a {
  font-size: clamp(34px, 9vw, 54px);
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--ink);
  text-decoration: none;
  /* Each link rises out of an invisible box, one after the next. */
  opacity: 0;
  transform: translateY(48px);
  transition:
    opacity 0.7s var(--ease),
    transform 0.7s var(--ease);
}

.menu[data-open="true"] a {
  opacity: 1;
  transform: translateY(0);
}

.menu a:nth-child(1) { transition-delay: 0.06s; }
.menu a:nth-child(2) { transition-delay: 0.12s; }
.menu a:nth-child(3) { transition-delay: 0.18s; }
.menu a:nth-child(4) { transition-delay: 0.24s; }

/* ---------------------------------------------------------------------------
   Buttons — a pill, and any trailing glyph lives in its own circle flush with
   the right inner padding. The circle is what moves on hover, not the label.
   --------------------------------------------------------------------------- */

.cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 9px 9px 9px 26px;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  text-decoration: none;
  transition:
    transform 0.6s var(--ease),
    box-shadow 0.6s var(--ease),
    background-color 0.6s var(--ease);
  box-shadow: 0 18px 40px -22px var(--accent);
}

.cta:hover {
  background: var(--accent-soft);
  box-shadow: 0 22px 46px -20px var(--accent);
}

.cta:active {
  transform: scale(0.98);
}

.cta__icon {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  background: rgba(0, 0, 0, 0.16);
  font-size: 15px;
  line-height: 1;
  transition: transform 0.6s var(--ease);
}

.cta:hover .cta__icon {
  transform: translate(4px, -1px) scale(1.06);
}

.cta.ghost {
  background: transparent;
  color: var(--ink);
  box-shadow: inset 0 0 0 1px var(--hair-strong);
}

.cta.ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.cta.ghost .cta__icon {
  background: rgba(255, 255, 255, 0.08);
}

.nav .cta {
  padding: 8px 8px 8px 20px;
  font-size: 14px;
}

.nav .cta__icon {
  width: 28px;
  height: 28px;
  font-size: 13px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 40px;
}

/* ---------------------------------------------------------------------------
   Type.
   --------------------------------------------------------------------------- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  border-radius: var(--r-pill);
  box-shadow: inset 0 0 0 1px var(--hair);
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.eyebrow::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.02;
}

h1 {
  font-size: clamp(44px, 6.6vw, 88px);
}

h2 {
  font-size: clamp(30px, 3.7vw, 48px);
  line-height: 1.05;
  max-width: 16ch;
}

.band-head h1 {
  font-size: clamp(30px, 3.7vw, 48px);
  line-height: 1.05;
  max-width: 16ch;
}

h3 {
  font-size: 21px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

p {
  margin: 0;
  color: var(--ink-soft);
}

a {
  color: var(--accent);
}

.lead {
  font-size: clamp(18px, 1.5vw, 21px);
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 46ch;
}

.small {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-faint);
}

.mono {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection {
  background: oklch(0.766 0.176 152 / 0.28);
}

/* ---------------------------------------------------------------------------
   Layout — a 12-column bento that collapses to a single column on a phone.
   --------------------------------------------------------------------------- */

.band {
  max-width: var(--page);
  margin: 0 auto;
  padding: var(--band) var(--gutter);
}

.band + .band {
  padding-top: 0;
}

.band-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 56px;
  max-width: 62ch;
}

.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.c4 { grid-column: span 4; }
.c5 { grid-column: span 5; }
.c6 { grid-column: span 6; }
.c7 { grid-column: span 7; }
.c8 { grid-column: span 8; }
.c12 { grid-column: span 12; }
.r2 { grid-row: span 2; }

/* The double bezel: an outer tray with a hairline, an inner plate with its own
   top highlight, and radii that stay concentric. Every panel on the site is
   this, at one of three paddings. */
.shell {
  padding: 7px;
  border-radius: var(--r-shell);
  background: var(--shell);
  box-shadow: inset 0 0 0 1px var(--hair);
}

.core {
  height: 100%;
  padding: 34px;
  border-radius: var(--r-core);
  background: linear-gradient(180deg, var(--core-top), var(--core-bottom));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.09),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.core.tight {
  padding: 26px;
}

.core.wide {
  padding: clamp(30px, 4vw, 56px);
}

/* A panel that leads with a number or a mark keeps it in a fixed 44px slot so
   a row of them lines up whatever the label lengths do. */
.core .index {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--accent);
}

.core p {
  font-size: 15.5px;
  line-height: 1.62;
}

.shell.accent {
  background: oklch(0.44 0.098 152 / 0.22);
  box-shadow: inset 0 0 0 1px oklch(0.766 0.176 152 / 0.3);
}

.shell.accent .core {
  background: linear-gradient(180deg, oklch(0.3 0.06 152 / 0.55), var(--core-bottom));
}

/* A card that is a link lifts very slightly and warms its hairline. Nothing
   scales, nothing shadows harder — the whole gesture is 6 pixels. */
.shell.link {
  text-decoration: none;
  color: inherit;
  transition:
    transform 0.7s var(--ease),
    background-color 0.7s var(--ease);
}

.shell.link:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, 0.06);
}

.rule {
  height: 1px;
  border: 0;
  margin: 22px 0;
  background: var(--hair);
}

/* Lists — a marker that is a rule, not a bullet glyph. */
.ticks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.ticks li {
  position: relative;
  padding-left: 26px;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 12px;
  height: 1px;
  background: var(--accent);
}

.ticks.plain li::before {
  background: var(--hair-strong);
}

/* ---------------------------------------------------------------------------
   Hero.
   --------------------------------------------------------------------------- */

.hero {
  padding-top: clamp(132px, 15vw, 196px);
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 26px;
  align-self: center;
}

.hero h1 {
  max-width: 13ch;
}

/* The explainer's frame. The canvas fills the inner plate, so the sequence's
   own vignette meets the plate's edge with nothing between them. */
/* .core is a flex column for text panels; the stage holds one canvas that must
   fill it exactly, so it goes back to being a plain block.

   No aspect-ratio here on purpose. .core is height:100%, and an aspect-ratio on
   a box whose height is already decided by the grid row computes a *width* from
   that height — which came out wider than the column and pushed the canvas out
   from under its own tray. The stage takes the row's height and the column's
   width; only the single-column layout below needs a ratio to have a height at
   all. */
.stage {
  position: relative;
  display: block;
  padding: 0;
  overflow: hidden;
  min-height: 420px;
  background: #050505;
}

.stage canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Shown only when WebGL is missing or scripting is off: the same six beats as
   words, which is also what a crawler and a screen reader get. */
.storyboard {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: beat;
}

.storyboard li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  align-items: baseline;
  font-size: 15px;
  color: var(--ink-soft);
}

.storyboard li::before {
  counter-increment: beat;
  content: "0" counter(beat);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.legend li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

.legend i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

.legend .k-message { color: #5c6a8f; }
.legend .k-decision { color: #25d366; }
.legend .k-action { color: #38bdf8; }
.legend .k-date { color: #f5b642; }

/* A sample of the real output, set as the product sets it. */
.brief {
  display: grid;
  gap: 8px;
}

.brief-line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--hair);
  font-size: 15px;
  color: var(--ink);
}

.brief-line:first-of-type {
  border-top: 0;
}

.tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px oklch(0.766 0.176 152 / 0.35);
}

.tag.quiet {
  color: var(--ink-faint);
  box-shadow: inset 0 0 0 1px var(--hair);
}

/* The beta warning. One amber ground, the same one the app uses for "something
   here is not fine", so the two products agree about what a warning looks like. */
.warn {
  border-radius: var(--r-core);
  padding: 24px 28px;
  font-size: 15px;
  line-height: 1.62;
  color: oklch(0.88 0.09 82);
  background: oklch(0.3 0.045 82 / 0.5);
  box-shadow: inset 0 0 0 1px oklch(0.6 0.09 82 / 0.32);
}

.warn strong {
  color: oklch(0.94 0.07 82);
  font-weight: 600;
}

.warn a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* A metric, for the strip under the hero. */
.metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.metric strong {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1;
}

.metric span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------------------
   Scroll entry. Nothing appears statically: panels arrive heavy, from below,
   out of focus. The hidden state is applied only once the module has run, so a
   page with scripting off still shows every word.
   --------------------------------------------------------------------------- */

.js .reveal {
  opacity: 0;
  transform: translate3d(0, 56px, 0);
  filter: blur(10px);
  transition:
    opacity 0.9s var(--ease),
    transform 0.9s var(--ease),
    filter 0.9s var(--ease);
  transition-delay: var(--delay, 0s);
}

/* Stagger, as classes rather than an inline `style` — the CSP is
   `style-src 'self'` and a style attribute is inline style. */
.d1 { --delay: 0.08s; }
.d2 { --delay: 0.16s; }
.d3 { --delay: 0.24s; }

.js .reveal.in {
  opacity: 1;
  transform: none;
  filter: blur(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js .reveal {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }

  .cta,
  .cta__icon,
  .shell.link {
    transition: none;
  }
}

/* ---------------------------------------------------------------------------
   Footer.
   --------------------------------------------------------------------------- */

.site-foot {
  max-width: var(--page);
  margin: 0 auto;
  padding: 0 var(--gutter) 72px;
}

.foot-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  padding-top: 48px;
  border-top: 1px solid var(--hair);
}

.foot-mark {
  font-size: clamp(48px, 9vw, 104px);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 0.9;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.09);
}

.foot-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
}

.foot-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14.5px;
  transition: color 0.5s var(--ease);
}

.foot-nav a:hover {
  color: var(--ink);
}

.foot-fine {
  margin-top: 28px;
  font-size: 13px;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------------------
   The 9:16 export page. A locked 1080x1920 frame, scaled to whatever screen is
   in front of it, so a screen recording of it is the deliverable itself.
   --------------------------------------------------------------------------- */

.export {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  gap: 26px;
  padding: 96px var(--gutter) 64px;
}

.frame {
  width: min(432px, calc(100vw - 2 * var(--gutter)));
  aspect-ratio: 9 / 16;
  padding: 7px;
}

.frame .core {
  display: block;
  padding: 0;
  overflow: hidden;
  background: #050505;
}

.frame canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.export-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 22px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------------------------------------------------------------------------
   Below 900px every asymmetry collapses. Overlapping and rotated panels are a
   desktop affordance; on a phone they are just overlapping touch targets.
   --------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .bento {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .c4, .c5, .c6, .c7, .c8, .c12 {
    grid-column: span 1;
  }

  .r2 {
    grid-row: span 1;
  }

  .nav-links {
    display: none;
  }

  .burger {
    display: block;
  }

  .nav {
    padding-left: 20px;
  }

  .stage {
    height: auto;
    min-height: 0;
    aspect-ratio: 3 / 4;
  }

  .band-head {
    margin-bottom: 34px;
  }

  .core {
    padding: 26px;
  }
}