/* Paleta derivada do laranja original da marca ÁTRIOZ. */
:root {
  --gold: #ff7900;
  --gold-soft: #ffb252;
  --text: #f8f2e9;
  --muted: rgba(248, 242, 233, 0.68);
}

.site-header {
  justify-content: flex-start;
}

.site-header.is-scrolled {
  background: transparent;
  border-color: transparent;
  backdrop-filter: none;
}

.brand {
  position: absolute;
  top: 44vh;
  left: 7vw;
  color: #fff0df;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  transform: translateY(-50%) scale(2.4);
  transform-origin: left center;
  will-change: top, left, transform;
}

.button {
  background: linear-gradient(135deg, #ff941f, #c84b00);
  box-shadow: 0 10px 32px rgba(255, 105, 0, 0.25);
}

/* A troca é instantânea porque o fim de cada vídeo já corresponde ao início do próximo. */
.video-stack video {
  transition: none;
}

.copy:not(.compact) {
  top: 51%;
}

.copy.compact {
  top: 34%;
}

.whisper {
  display: grid;
  gap: 7px;
  position: static;
  margin: clamp(1rem, 2.3vh, 1.55rem) 0 0;
}

.whisper strong {
  color: var(--text);
  font-family: Manrope, sans-serif;
  font-size: clamp(2rem, 3.2vw, 3.8rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 1;
}

.whisper span {
  color: var(--gold-soft);
  font-family: Inter, sans-serif;
  font-size: 0.66rem;
  letter-spacing: 0.19em;
  text-transform: uppercase;
}

.scroll-hint {
  right: auto;
  left: 50%;
  bottom: 22px;
  flex-direction: column;
  gap: 7px;
  transform: translateX(-50%);
  transition: opacity 180ms ease;
  pointer-events: none;
}

.scroll-hint i {
  position: relative;
  width: 27px;
  height: 43px;
  border: 1px solid rgba(255, 250, 242, 0.42);
  border-radius: 999px;
  background: transparent;
}

.scroll-hint i::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  border-radius: 999px;
  background: var(--gold);
  transform: translateX(-50%);
  animation: atrioz-scroll-cue 1.7s ease-in-out infinite;
}

.scroll-hint span {
  font-size: 0.54rem;
}

@keyframes atrioz-scroll-cue {
  0% { transform: translate(-50%, -5px); opacity: 0; }
  40%, 70% { opacity: 1; }
  100% { transform: translate(-50%, 8px); opacity: 0; }
}

@media (max-width: 900px) {
  .brand {
    top: 42vh;
    left: 16vw;
    transform: translateY(-50%) scale(1.8);
  }

  .copy:not(.compact) {
    top: 49%;
  }

  .copy.compact {
    top: 36%;
  }

  .scroll-hint {
    display: flex;
    bottom: 16px;
  }

  .scroll-hint span {
    display: none;
  }
}

@media (max-width: 520px) {
  .brand span {
    display: inline;
  }

  .copy,
  .copy-hero,
  .compact {
    left: 16vw;
    width: 78vw;
  }

  .problem-card,
  .card-b,
  .card-c {
    left: 16vw;
    width: 78vw;
  }

  .architecture,
  .signals,
  footer {
    left: 16vw;
    right: 5vw;
  }
}