/* =====================================================================
   Interactions (loaded after styles.css)
   ===================================================================== */
:root { --ease-out: cubic-bezier(.2, .7, .2, 1); }

/* ---------- Sticky nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: transform .35s var(--ease-out), box-shadow .25s ease;
}
.nav.is-scrolled { box-shadow: 0 1px 0 rgba(0, 0, 0, .08); }
.nav.is-hidden { transform: translateY(-100%); }

.nav-links a { position: relative; }
.nav-links a:hover { text-decoration: none; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s var(--ease-out);
}
.nav-links a:hover::after { transform: scaleX(1); transform-origin: left; }

/* ---------- Mobile menu ---------- */
.menu-toggle {
  display: none;
  place-content: center;
  gap: 7px;
  width: 48px; height: 48px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: var(--grad-button);
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--white);
  transition: transform .3s var(--ease-out);
}
.nav.menu-open .menu-toggle span:first-child { transform: translateY(4.5px) rotate(45deg); }
.nav.menu-open .menu-toggle span:last-child  { transform: translateY(-4.5px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 80px 0 auto 0;
  z-index: 49;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px var(--gutter) 32px;
  background: var(--white);
  box-shadow: 0 24px 40px rgba(0, 0, 0, .08);
  opacity: 0;
  transform: translateY(-12px);
  transition: opacity .25s ease, transform .3s var(--ease-out);
}
.mobile-menu[hidden] { display: none; }
.mobile-menu.is-open { opacity: 1; transform: none; }
.mobile-menu > a:not(.btn) {
  font-family: var(--font-display);
  font-size: 44px;
  line-height: 52px;
  text-transform: uppercase;
}
.mobile-menu .btn { align-self: flex-start; margin-top: 16px; }

@media (max-width: 720px) {
  .menu-toggle { display: grid; }
}

/* ---------- Buttons ---------- */
.btn { transition: transform .15s ease; }
.btn:active { transform: scale(.98); }
.btn:focus-visible { outline: 2px solid var(--accent-to); outline-offset: 3px; }
.btn-pill { transition: width .2s cubic-bezier(.65, 0, .35, 1), gap .2s cubic-bezier(.65, 0, .35, 1); }
.btn:hover .btn-pill,
.btn:focus-visible .btn-pill { width: calc(100% - 2 * var(--pill-inset)); gap: 10px; }

/* Dotted chevrons: a wave of dots that runs continuously */
@keyframes dot-wave {
  0%, 70%, 100% { opacity: .25; transform: scale(.85); }
  35% { opacity: 1; transform: scale(1); }
}
.btn-dot {
  transform-box: fill-box;
  transform-origin: center;
  animation: dot-wave 1.4s ease-in-out infinite;
}

/* ---------- Hero entrance ---------- */
.split-lines .line { display: block; overflow: hidden; padding-bottom: .04em; margin-bottom: -.04em; }
.split-lines .line > span { display: block; }
.js .split-lines .line > span {
  transform: translateY(105%);
  transition: transform .9s var(--ease-out);
}
.js .split-lines .line:nth-child(2) > span { transition-delay: .08s; }
.js .split-lines .line:nth-child(3) > span { transition-delay: .16s; }
.js.is-loaded .split-lines .line > span { transform: none; }

.js .hero-content > :not(h1) {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s ease .35s, transform .7s var(--ease-out) .35s;
}
.js .hero-content > .hero-actions { transition-delay: .45s; }
.js.is-loaded .hero-content > :not(h1) { opacity: 1; transform: none; }

/* ---------- Scroll reveal ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s ease var(--delay, 0ms), transform .8s var(--ease-out) var(--delay, 0ms);
}
.js [data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Parallax image frames ---------- */
.cta-media { border-radius: var(--radius-lg); overflow: hidden; }
.cta-media img, .demo-media > img {
  transform: scale(1.12);
  will-change: transform;
}

/* ---------- Product stage ---------- */
.product-stage img { transition: transform .6s var(--ease-out); }
.product-stage:hover img { transform: translateY(-10px) rotate(-2deg); }

/* ---------- Feature blocks ---------- */
.feature h3 { position: relative; transition: padding-left .3s var(--ease-out); }
.feature h3::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 0; height: 3px;
  background: var(--black);
  transition: width .3s var(--ease-out);
}
.feature:hover h3 { padding-left: 28px; }
.feature:hover h3::before { width: 18px; }

/* ---------- Demo ---------- */
.demo-media { cursor: pointer; }
.play {
  --px: 0px; --py: 0px;
  translate: calc(-50% + var(--px)) calc(-50% + var(--py));
  transition: translate .35s var(--ease-out), transform .25s var(--ease-out);
}
.play::before, .play::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, .6);
  animation: ring 2.4s var(--ease-out) infinite;
  pointer-events: none;
}
.play::after { animation-delay: 1.2s; }
@keyframes ring {
  from { transform: scale(1); opacity: .8; }
  to   { transform: scale(1.7); opacity: 0; }
}
.demo-media:hover .play { transform: scale(1.08); }
/* Demo button: white fill sweeps in from the left, colours flip */
.demo-cta {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  transition: color .35s var(--ease-out), border-color .35s ease;
}
.demo-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--white);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease-out);
}
.demo-cta:hover, .demo-cta:focus-visible { color: var(--black); border-color: var(--white); }
.demo-cta:hover::before, .demo-cta:focus-visible::before { transform: none; }
.demo-cta:focus-visible { outline: 2px solid var(--white); outline-offset: 4px; }
.demo-cta .demo-cta-text span { transition: color .35s ease; }
.demo-cta:hover .demo-cta-text span, .demo-cta:focus-visible .demo-cta-text span { color: var(--text-muted); }
.demo-cta-play { transition: transform .35s var(--ease-out), box-shadow .35s ease; }
.demo-cta:hover .demo-cta-play { transform: scale(1.08); box-shadow: 0 8px 24px rgba(0, 0, 0, .25); }
.demo-cta-arrow { transition: background-color .35s ease, border-color .35s ease, transform .35s var(--ease-out); }
.demo-cta-arrow img { transition: filter .35s ease, transform .35s var(--ease-out); }
.demo-cta:hover .demo-cta-arrow { background: var(--black); border-color: var(--black); transform: rotate(45deg); }
.demo-cta:active { transform: scale(.99); }

.demo-dialog {
  width: min(1100px, calc(100vw - 32px));
  max-width: none;
  padding: 0;
  border: 0;
  border-radius: var(--radius-lg);
  background: var(--black);
  color: var(--white);
  overflow: hidden;
}
.demo-dialog::backdrop { background: rgba(0, 0, 0, .8); backdrop-filter: blur(6px); }
.demo-dialog[open] { animation: dialog-in .35s var(--ease-out); }
.demo-dialog[open]::backdrop { animation: fade-in .3s ease; }
@keyframes dialog-in { from { opacity: 0; transform: translateY(20px) scale(.97); } }
@keyframes fade-in { from { opacity: 0; } }
.dialog-body video, .dialog-placeholder img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.dialog-placeholder { position: relative; }
.dialog-placeholder[hidden] { display: none; }
.dialog-placeholder p {
  position: absolute;
  inset: auto 0 0 0;
  padding: 48px 28px 24px;
  background: linear-gradient(transparent, rgba(0, 0, 0, .85));
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.1;
  text-transform: uppercase;
}
.dialog-close {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 1;
  width: 44px; height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--white);
  color: var(--black);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  transition: transform .25s var(--ease-out);
}
.dialog-close:hover { transform: rotate(90deg); }

/* ---------- Testimonials ---------- */
.testimonial { transition: transform .35s var(--ease-out), background-color .35s ease, box-shadow .35s ease; }
.testimonial:hover {
  transform: translateY(-6px);
  background: var(--white);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, .9);
}

/* ---------- FAQ ---------- */
.faq-row { transition: background-color .25s ease, color .25s ease; }
.faq-row:hover { background: #e9e9e9; }
.faq-row.is-open { background: var(--grad-card); color: var(--white); }
.faq-row.is-open p { color: var(--text-muted-on-dark); }
.faq-row.is-open summary img { filter: invert(1); }

/* ---------- Stretched letters (see initStretch in script.js) ---------- */
/* :is() lifts specificity above `.split-lines .line > span` and `.stretch-line` */
:is(.is-stretch, .split-lines .line > .is-stretch) { display: flex; white-space: nowrap; }
.is-stretch .ch { display: block; flex: none; }
.is-stretch .glyph {
  display: inline-block;
  white-space: pre;
  transform-origin: left center;
}

.stretch-line:not(.is-stretch) { display: block; }
.cta-content .display { align-self: stretch; } /* column is align-items:flex-start; headings need full width to fill */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- Footer wordmark ---------- */
.footer-wordmark { overflow: hidden; cursor: default; }
.js .footer-wordmark .ch {
  transform: translateY(100%);
  transition: transform .9s var(--ease-out) calc(var(--i, 0) * 40ms);
}
.js .footer-wordmark.is-visible .ch { transform: none; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition-duration: 0s !important;
    transition-delay: 0s !important;
  }
  .js [data-reveal], .js .hero-content > :not(h1) { opacity: 1; transform: none; }
  .js .split-lines .line > span, .js .footer-wordmark .ch { transform: none; }
  .cta-media img, .demo-media > img { transform: none; }
}