/* ---------------------------------------------------------------------------
   Reset
   Breakpoints follow Tailwind: sm 640px, md 768px, lg 1024px
--------------------------------------------------------------------------- */

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  font-family: 'Helvetica Neue Light', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #c2ccd3;
  color: #000;
}

/* the WebGPU glass canvas sits behind every UI layer */
canvas {
  position: fixed;
  top: 0;
  left: 0;
  display: block;
  z-index: 0;
}

.icon { flex: none; }

.glass-defs {
  position: absolute;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* ---------------------------------------------------------------------------
   Hero shell
--------------------------------------------------------------------------- */

.hero {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  color: #000;
  pointer-events: none; /* orbit-drag passes through to the canvas */
}

/* ---------------------------------------------------------------------------
   Navbar
--------------------------------------------------------------------------- */

.nav {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem;
}

.nav__item {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: #000;
  background: none;
  border: 0;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
  pointer-events: auto;
  transition: opacity 300ms;
}
.nav__item:hover { opacity: 0.6; }

.nav__label {
  font-size: 0.875rem;
  line-height: 1.25rem;
  letter-spacing: 0.025em;
}

.nav__label--menu { display: none; }

.nav__dot {
  width: 8px;
  height: 8px;
  border-radius: 9999px;
  background: #000;
}

@media (min-width: 640px) {
  .nav { padding: 1.25rem 1.5rem; }
  .nav__label--menu { display: inline; }
}
@media (min-width: 768px) {
  .nav { padding: 1.5rem 3rem; }
}

/* ---------------------------------------------------------------------------
   Vertical border lines (desktop only)
--------------------------------------------------------------------------- */

.rule {
  position: absolute;
  top: 0;
  bottom: 0;
  display: none;
  flex-direction: column;
  align-items: center;
}
.rule--left  { left: 1.25rem; }
.rule--right { right: 1.25rem; }

.rule__seg { width: 1px; background: rgba(0, 0, 0, 0.2); }
.rule__seg--end { height: 15%; }
.rule__seg--mid { flex: 1 1 0%; }

.rule__plus {
  font-size: 0.75rem;
  line-height: 1;
  color: rgba(0, 0, 0, 0.4);
  padding: 0.25rem 0;
}

@media (min-width: 768px) { .rule { display: flex; } }

/* ---------------------------------------------------------------------------
   Bottom two-column content
--------------------------------------------------------------------------- */

.hero-bottom {
  position: relative;
  z-index: 2;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  /* horizontal padding matches .nav so both columns align with the navbar */
  padding: 0 1.25rem 1.5rem;
}

/* mobile-only scrim: the spec's white text needs contrast, and unlike the
   original dark video our backdrop is a bright glass render */
.hero-bottom::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: -4rem;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0) 0%,
    rgba(0, 0, 0, 0.26) 45%,
    rgba(0, 0, 0, 0.46) 100%
  );
}

@media (min-width: 640px) {
  .hero-bottom { padding: 0 1.5rem 2rem; }
  .hero-bottom::before { display: none; }
}
@media (min-width: 768px) {
  .hero-bottom {
    /* span the full area under the navbar so the two columns can sit at
       opposite ends of it: copy at the top, card at the bottom */
    flex: 1;
    margin-top: 0;
    flex-direction: row;
    align-items: stretch;
    justify-content: space-between;
    gap: 3rem;
    padding: 2rem 3rem 3rem;
  }

  .lede { align-self: flex-start; }
  .card { align-self: flex-end; }
}

/* --- left column --- */

.lede { max-width: 24rem; }

.lede__title {
  font-size: 1.25rem;
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: #fff;
}

.lede__body {
  margin-top: 0.75rem;
  max-width: 280px;
  font-size: 0.75rem;
  line-height: 1.625;
  color: rgba(255, 255, 255, 0.7);
}

@media (min-width: 640px) {
  .lede__title { font-size: 1.5rem; color: #000; }
  .lede__body  { font-size: 0.875rem; color: rgba(0, 0, 0, 0.6); }
}
@media (min-width: 768px) {
  .lede__title { font-size: 1.875rem; }
  .lede__body  { margin-top: 1rem; }
}
@media (min-width: 1024px) {
  .lede__title { font-size: 2.25rem; }
}

/* --- chamfered button --- */

.chamfer {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 220px;
  height: 44px;
  margin-top: 1.5rem;
  padding: 0 1.25rem;
  color: #000;
  text-decoration: none;
  pointer-events: auto;
  transition: opacity 300ms;
}
.chamfer:hover { opacity: 0.7; }

/* mobile-only glass backing, clipped to the same chamfer silhouette */
.chamfer__glass {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 0, 0, 0.2);
  clip-path: polygon(
    14px 0, 100% 0, 100% calc(100% - 14px),
    calc(100% - 14px) 100%, 0 100%, 0 14px
  );
}

.chamfer__outline {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chamfer__label {
  position: relative;
  font-size: 0.75rem;
  letter-spacing: 0.025em;
}

.chamfer .icon { position: relative; }

@media (min-width: 640px) {
  .chamfer { width: 260px; height: 48px; padding: 0 1.5rem; }
  .chamfer__label { font-size: 0.875rem; }
  .chamfer__glass {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-color: transparent;
  }
}
@media (min-width: 768px) {
  .chamfer { margin-top: 2rem; }
}

/* --- right column: glass card --- */

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 340px;
  max-width: 100%;
  height: 460px;
  padding: 2rem;
  border-radius: 48px;
  overflow: hidden;
  background: transparent;
  border: 1px solid rgba(47, 47, 47, 0.15);
  pointer-events: auto;
  animation: fade-slide-up-card 900ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes fade-slide-up-card {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* full-viewport-aligned copy of the backdrop, refracted by the SVG filter.
   left/top/width/height are driven every frame from glass-card.js */
#dup-video-container {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

#dup-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  filter: url(#liquid-glass-refraction);
}

.card__frost {
  position: absolute;
  inset: 0;
  z-index: 1;
  border-radius: 48px;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.05);
  box-shadow:
    inset 0 1.5px 2px rgba(255, 255, 255, 0.3),
    inset 0 -1px 2px rgba(0, 0, 0, 0.15);
  transition: background 400ms;
}

.card.group:hover .card__frost { background: rgba(255, 255, 255, 0.1); }

.card__head,
.card__body,
.card__wave {
  position: relative;
  z-index: 2;
}

.card__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.card__title {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.025em;
}

.card__index {
  font-size: 0.75rem;
  color: rgba(0, 0, 0, 0.4);
}

.card__body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 1rem;
}

.finding__title {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.025em;
}

.finding__text {
  margin-top: 0.25rem;
  font-size: 0.75rem;
  line-height: 1.625;
  color: rgba(0, 0, 0, 0.5);
}

.card__wave {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.25rem;
}

@media (min-width: 640px) {
  .card__title { font-size: 1.125rem; }
}
@media (min-width: 768px) {
  .card__head { padding-bottom: 1rem; }
  .card__title { font-size: 1.25rem; }
  .card__body { gap: 1.25rem; margin-top: 1.25rem; }
  .finding__title { font-size: 1rem; }
  .finding__text { font-size: 0.875rem; margin-top: 0.375rem; }
  .card__wave { margin-top: 1.5rem; }
}

/* ---------------------------------------------------------------------------
   Slide-in menu
--------------------------------------------------------------------------- */

.menu {
  position: fixed;
  inset: 0;
  z-index: 50;
  visibility: hidden;
  pointer-events: none;
  transition: visibility 0s linear 500ms;
}
.menu.is-open {
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}

.menu__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 500ms;
}
.menu.is-open .menu__backdrop { opacity: 1; }

.menu__panel {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  width: 100%;
  height: 100%;
  padding: 1.5rem 2rem;
  background: #f5f4f0;
  transform: translateX(-100%);
  transition: transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}
.menu.is-open .menu__panel { transform: translateX(0); }

@media (min-width: 640px) {
  .menu__panel { width: 380px; padding: 1.5rem 2.5rem; }
}

.menu__close {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  align-self: flex-start;
  margin-bottom: 3rem;
  background: none;
  border: 0;
  font: inherit;
  font-size: 0.875rem;
  color: #000;
  cursor: pointer;
  transition: opacity 300ms;
}
.menu__close:hover { opacity: 0.6; }

.menu__nav { display: flex; flex-direction: column; }

.menu__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  color: #000;
  text-decoration: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms, transform 500ms;
}

.menu__linkText {
  font-size: 1.5rem;
  font-weight: 300;
  letter-spacing: -0.025em;
  transition: transform 300ms;
}
.menu__link:hover .menu__linkText { transform: translateX(8px); }

.menu__arrow {
  opacity: 0;
  transform: translateX(8px);
  transition: opacity 300ms, transform 300ms;
}
.menu__link:hover .menu__arrow { opacity: 1; transform: translateX(0); }

@media (min-width: 640px) {
  .menu__linkText { font-size: 1.875rem; }
}

.menu.is-open .menu__link { opacity: 1; transform: translateY(0); }
.menu.is-open .menu__link:nth-child(1) { transition-delay: 150ms; }
.menu.is-open .menu__link:nth-child(2) { transition-delay: 225ms; }
.menu.is-open .menu__link:nth-child(3) { transition-delay: 300ms; }
.menu.is-open .menu__link:nth-child(4) { transition-delay: 375ms; }
.menu.is-open .menu__link:nth-child(5) { transition-delay: 450ms; }

.menu__foot {
  margin-top: auto;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms, transform 500ms;
}
.menu.is-open .menu__foot {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 600ms;
}

.menu__footLabel {
  display: block;
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  color: rgba(0, 0, 0, 0.4);
}

.menu__mail {
  font-size: 0.875rem;
  color: rgba(0, 0, 0, 0.7);
  text-decoration: none;
  transition: color 300ms;
}
.menu__mail:hover { color: #000; }

/* ---------------------------------------------------------------------------
   Debug GUI — hidden by default, toggled with the H key
--------------------------------------------------------------------------- */

.lil-gui.autoPlace {
  z-index: 80;
  top: 4.5rem;
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: 0.01ms !important; }
}