.brand-photo {
  width: 2.15rem;
  height: 2.15rem;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--glass-line);
  box-shadow: 0 8px 20px rgba(0, 122, 255, 0.18);
  background: var(--panel-strong);
}

.brand:hover .brand-photo {
  transform: translateY(-1px) scale(1.03);
}

.brand-photo,
.board-item,
.hero-board {
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}

.hero-board {
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 2.6vw, 2rem);
  display: grid;
  align-content: center;
  gap: 1rem;
  min-height: 500px;
  animation: enterUp .82s .08s ease both;
}

.board-header {
  display: grid;
  gap: .25rem;
  padding: .2rem .2rem .7rem;
}

.board-header strong {
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  letter-spacing: -.035em;
  line-height: 1.1;
}

.board-stack {
  display: grid;
  gap: .8rem;
}

.board-item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: .85rem;
  min-height: 5.3rem;
  padding: .92rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(255,255,255,.62), rgba(255,255,255,.26));
  backdrop-filter: blur(18px) saturate(160%);
  box-shadow: var(--soft-shadow);
}

@media (prefers-color-scheme: dark) {
  .board-item {
    background: linear-gradient(145deg, rgba(255,255,255,.10), rgba(255,255,255,.04));
  }
}

.board-item:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--blue), transparent 48%);
  box-shadow: 0 18px 46px rgba(0, 0, 0, .12);
}

.board-item strong {
  display: block;
  font-size: 1rem;
  letter-spacing: -.02em;
}

.board-item small {
  display: block;
  margin-top: .18rem;
  color: var(--muted);
  font-size: .86rem;
  line-height: 1.35;
}

.hero-content,
.hero-board {
  min-height: 440px;
}

.hero-content h1 {
  max-width: 680px;
}

.hero-content .lead {
  max-width: 590px;
}

.topbar {
  padding-left: .7rem;
}

.icon-app {
  flex: 0 0 auto;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  z-index: 40;
  transform-origin: left center;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--purple));
  box-shadow: 0 0 18px rgba(0, 122, 255, .35);
}

.liquid-scroll-field {
  position: fixed;
  inset: -20vh -10vw auto -10vw;
  height: 42vh;
  z-index: 1;
  pointer-events: none;
  opacity: calc(.08 + (var(--scroll-progress, 0) * .32));
  background:
    radial-gradient(circle at calc(16% + (var(--scroll-progress, 0) * 38%)) 34%, rgba(0,122,255,.45), transparent 16rem),
    radial-gradient(circle at calc(82% - (var(--scroll-progress, 0) * 26%)) 18%, rgba(191,90,242,.28), transparent 14rem),
    radial-gradient(circle at 72% 86%, rgba(100,210,255,.18), transparent 18rem);
  filter: blur(34px) saturate(150%);
  transform: translateY(calc(var(--scroll-progress, 0) * 90px));
  transition: opacity .24s ease;
}

.topbar::after {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(255,255,255,.48), transparent 58%);
  opacity: .56;
}

.topbar-scrolled {
  background:
    linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.42)),
    rgba(255,255,255,.56);
  border-color: color-mix(in srgb, var(--blue), var(--glass-line) 74%);
  box-shadow: 0 18px 48px rgba(25, 35, 60, .14);
  backdrop-filter: blur(34px) saturate(210%);
}

@media (prefers-color-scheme: dark) {
  .topbar-scrolled {
    background:
      linear-gradient(180deg, rgba(255,255,255,.14), rgba(255,255,255,.05)),
      rgba(24,26,32,.66);
    box-shadow: 0 18px 52px rgba(0,0,0,.42);
  }
}

.reveal-section {
  opacity: .78;
  transform: translateY(18px) scale(.992);
  filter: blur(2px);
  transition: opacity .7s ease, transform .7s ease, filter .7s ease;
}

.reveal-section.revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

.glass-panel,
.flagship-card,
.app-link-card,
.principle-list article,
.contact-panel {
  isolation: isolate;
}

.glass-panel::after,
.flagship-card::after,
.app-link-card::after,
.principle-list article::after,
.contact-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-radius: inherit;
  opacity: calc(.15 + (var(--scroll-progress, 0) * .22));
  background: linear-gradient(110deg, transparent 0%, rgba(255,255,255,.28) 34%, transparent 62%);
  transform: translateX(calc(-20% + (var(--scroll-progress, 0) * 40%)));
}

@media (max-width: 920px) {
  .hero-board,
  .hero-content {
    min-height: auto;
  }

  .board-item {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .brand span {
    font-size: .95rem;
  }

  .brand-photo {
    width: 2rem;
    height: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .brand-photo,
  .board-item,
  .hero-board,
  .reveal-section,
  .liquid-scroll-field,
  .scroll-progress {
    transition: none !important;
    animation: none !important;
  }

  .reveal-section {
    opacity: 1;
    transform: none;
    filter: none;
  }
}