/* Brand mark */
.brand-mark {
  isolation: isolate;
  border: 0;
  overflow: visible;
  background: transparent;
}

.brand-mark::before,
.brand-mark::after,
.brand-mark i,
.brand-mark b {
  display: none;
}

.brand-symbol {
  width: 48px;
  height: 48px;
  overflow: visible;
  color: var(--ink);
  filter: drop-shadow(0 7px 16px rgba(18, 17, 15, 0.08));
}

.logo-frame,
.logo-ring,
.logo-orbit {
  fill: none;
  vector-effect: non-scaling-stroke;
}

.logo-frame {
  stroke: currentColor;
  stroke-width: 1.2;
}

.logo-ring {
  stroke: currentColor;
  stroke-width: 1;
  opacity: 0.2;
  transform-origin: 32px 32px;
}

.logo-orbit {
  stroke-width: 1.6;
  transform-origin: 32px 32px;
  transform-box: fill-box;
}

.logo-orbit-a {
  stroke: var(--copper);
  animation: logo-orbit-a 18s linear infinite;
}

.logo-orbit-b {
  stroke: var(--ink);
  opacity: 0.62;
  animation: logo-orbit-b 23s linear infinite reverse;
}

.logo-core {
  fill: var(--wine);
  transform-origin: 32px 32px;
  animation: logo-core-breathe 5.6s ease-in-out infinite;
}

.logo-aperture {
  fill: var(--paper-light);
}

.logo-node {
  fill: var(--copper);
  transform-origin: 32px 32px;
  filter: drop-shadow(0 0 5px rgba(177, 138, 85, 0.55));
  animation: logo-node-pulse 3.8s ease-in-out infinite;
}

.brand:hover .logo-ring {
  animation: logo-ring-expand 1.2s ease both;
}

.brand:hover .brand-symbol {
  transform: rotate(-2deg) scale(1.04);
}

.brand-symbol,
.brand-copy {
  transition: transform 0.5s cubic-bezier(0.2, 0.72, 0.2, 1);
}

.brand:hover .brand-copy {
  transform: translateX(3px);
}

/* Scroll and cursor */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 120;
  height: 2px;
  pointer-events: none;
  background: rgba(18, 17, 15, 0.05);
}

.scroll-progress i {
  display: block;
  width: 100%;
  height: 100%;
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left center;
  background: linear-gradient(90deg, var(--wine), var(--copper));
  box-shadow: 0 0 12px rgba(177, 138, 85, 0.3);
  will-change: transform;
}

.cursor-aura {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 8;
  width: 260px;
  aspect-ratio: 1;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transform: translate3d(calc(var(--cursor-x, -300px) - 50%), calc(var(--cursor-y, -300px) - 50%), 0);
  background: radial-gradient(circle, rgba(177, 138, 85, 0.13), rgba(91, 24, 32, 0.045) 42%, transparent 72%);
  filter: blur(12px);
  mix-blend-mode: multiply;
  transition: opacity 0.35s ease;
  will-change: transform;
}

body.has-fine-pointer .cursor-aura {
  opacity: 1;
}

/* Route and viewport reveals */
#app.route-enter {
  animation: route-enter 0.72s cubic-bezier(0.2, 0.72, 0.2, 1) both;
}

.reveal-ready {
  opacity: 0;
  transform: translateY(28px);
  clip-path: inset(0 0 16% 0);
  transition:
    opacity 0.8s cubic-bezier(0.2, 0.72, 0.2, 1),
    transform 0.8s cubic-bezier(0.2, 0.72, 0.2, 1),
    clip-path 0.9s cubic-bezier(0.2, 0.72, 0.2, 1);
  transition-delay: var(--reveal-delay, 0ms);
}

.reveal-ready.is-visible {
  opacity: 1;
  transform: translateY(0);
  clip-path: inset(0 0 0 0);
}

/* Magnetic controls */
.is-magnetic {
  --mag-x: 0px;
  --mag-y: 0px;
  transform: translate3d(var(--mag-x), var(--mag-y), 0);
  transition:
    transform 0.42s cubic-bezier(0.2, 0.72, 0.2, 1),
    color 0.22s ease,
    background 0.22s ease,
    border-color 0.22s ease;
  will-change: transform;
}

.is-magnetic > * {
  pointer-events: none;
}

/* Tilt and sheen */
.tilt-surface {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --sheen-x: 50%;
  --sheen-y: 50%;
  position: relative;
  transform: perspective(1000px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y)) translateZ(0);
  transform-style: preserve-3d;
  transition:
    transform 0.56s cubic-bezier(0.2, 0.72, 0.2, 1),
    color 0.3s ease,
    background 0.3s ease;
  will-change: transform;
}

.tilt-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle at var(--sheen-x) var(--sheen-y), rgba(255, 255, 255, 0.18), transparent 34%);
  transition: opacity 0.35s ease;
}

.tilt-surface:hover::before {
  opacity: 1;
}

.tilt-surface > * {
  position: relative;
  z-index: 4;
}

.card.tilt-surface::after {
  z-index: 5;
}

/* Nav interaction */
.nav-link {
  overflow: hidden;
}

.nav-link::before {
  content: "";
  position: absolute;
  inset: auto 16px 15px;
  height: 1px;
  transform: scaleX(0);
  transform-origin: right center;
  background: var(--copper);
  transition: transform 0.34s cubic-bezier(0.2, 0.72, 0.2, 1);
}

.nav-link:hover::before {
  transform: scaleX(1);
  transform-origin: left center;
}

.nav-link span {
  transition: transform 0.32s ease, color 0.32s ease;
}

.nav-link:hover span {
  color: var(--wine);
  transform: translateY(-2px);
}

/* Hero depth */
.hero-main::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.72;
  background:
    radial-gradient(circle at calc(74% + var(--hero-glow-x, 0px)) calc(44% + var(--hero-glow-y, 0px)), rgba(91, 24, 32, 0.25), transparent 27%),
    radial-gradient(circle at calc(62% + var(--hero-glow-x, 0px)) calc(32% + var(--hero-glow-y, 0px)), rgba(177, 138, 85, 0.12), transparent 20%);
  transition: background-position 0.8s ease;
}

.hero-folio span,
.side-index span,
.side-index b {
  transition: transform 0.7s cubic-bezier(0.2, 0.72, 0.2, 1), opacity 0.7s ease;
}

.hero:hover .hero-folio span:first-child {
  transform: translateX(6px);
}

.hero:hover .hero-folio span:last-child {
  transform: translateX(-6px);
}

.hero:hover .side-index b {
  transform: translateY(-5px);
}

/* Section micro-interactions */
.method-strip article,
.metric,
.example-card,
.mode span,
.engine-option span {
  overflow: hidden;
}

.method-strip article::after,
.metric::after,
.example-card::after,
.mode span::after,
.engine-option span::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 2px;
  background: var(--copper);
  transition: right 0.42s cubic-bezier(0.2, 0.72, 0.2, 1);
}

.method-strip article,
.metric,
.example-card,
.mode span,
.engine-option span {
  position: relative;
}

.method-strip article:hover::after,
.metric:hover::after,
.example-card:hover::after,
.mode span:hover::after,
.engine-option span:hover::after {
  right: 0;
}

.metric strong {
  transition: transform 0.45s cubic-bezier(0.2, 0.72, 0.2, 1), color 0.3s ease;
}

.metric:hover strong {
  color: var(--wine);
  transform: translateY(-4px);
}

.pattern {
  transition: transform 0.32s ease, border-color 0.32s ease;
}

.pattern:hover {
  transform: translateX(5px);
  border-color: rgba(91, 24, 32, 0.42);
}

/* Input focus polish */
.field {
  position: relative;
}

.field::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--wine), var(--copper));
  transition: right 0.42s cubic-bezier(0.2, 0.72, 0.2, 1);
}

.field:focus-within::after {
  right: 0;
}

textarea,
input,
select {
  transition: color 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

textarea:focus,
input:focus,
select:focus {
  background: linear-gradient(180deg, transparent, rgba(177, 138, 85, 0.035));
}

/* Ambient movement */
.ambient-one,
.ambient-two {
  transform: translate3d(var(--ambient-x, 0px), var(--ambient-y, 0px), 0);
  transition: transform 1.4s cubic-bezier(0.2, 0.72, 0.2, 1);
  will-change: transform;
}

@keyframes logo-orbit-a {
  to {
    transform: rotate(333deg);
  }
}

@keyframes logo-orbit-b {
  to {
    transform: rotate(423deg);
  }
}

@keyframes logo-core-breathe {
  0%,
  100% {
    transform: scale(0.92);
  }
  50% {
    transform: scale(1.08);
  }
}

@keyframes logo-node-pulse {
  0%,
  100% {
    opacity: 0.6;
    transform: scale(0.82);
  }
  50% {
    opacity: 1;
    transform: scale(1.22);
  }
}

@keyframes logo-ring-expand {
  0% {
    opacity: 0.2;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.12);
  }
  100% {
    opacity: 0.2;
    transform: scale(1);
  }
}

@keyframes route-enter {
  from {
    opacity: 0;
    transform: translateY(18px);
    filter: blur(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@media (pointer: coarse), (max-width: 760px) {
  .cursor-aura {
    display: none;
  }

  .tilt-surface,
  .is-magnetic {
    transform: none !important;
  }

  .tilt-surface::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-progress {
    display: none;
  }

  .cursor-aura {
    display: none;
  }

  .brand-symbol,
  .logo-ring,
  .logo-orbit-a,
  .logo-orbit-b,
  .logo-core,
  .logo-node,
  #app.route-enter,
  .reveal-ready,
  .is-magnetic,
  .tilt-surface,
  .ambient-one,
  .ambient-two {
    animation: none !important;
    transform: none !important;
    transition: none !important;
  }

  .reveal-ready {
    opacity: 1 !important;
    clip-path: none !important;
  }
}