/* ============================================================
   NUERA LINKS — ANIMATIONS
   Cross-browser · All OS · Prefixed for Chrome/Safari/Firefox/Edge
   ============================================================ */

/* ── Keyframes ── */

@-webkit-keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@-webkit-keyframes slideUp {
  from { opacity: 0; -webkit-transform: translateY(32px); transform: translateY(32px); }
  to   { opacity: 1; -webkit-transform: translateY(0);    transform: translateY(0); }
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

@-webkit-keyframes slideDown {
  from { opacity: 0; -webkit-transform: translateY(-16px); transform: translateY(-16px); }
  to   { opacity: 1; -webkit-transform: translateY(0);      transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-16px); }
  to   { opacity: 1; transform: translateY(0); }
}

@-webkit-keyframes slideLeft {
  from { opacity: 0; -webkit-transform: translateX(32px); transform: translateX(32px); }
  to   { opacity: 1; -webkit-transform: translateX(0);    transform: translateX(0); }
}
@keyframes slideLeft {
  from { opacity: 0; transform: translateX(32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@-webkit-keyframes slideRight {
  from { opacity: 0; -webkit-transform: translateX(-32px); transform: translateX(-32px); }
  to   { opacity: 1; -webkit-transform: translateX(0);     transform: translateX(0); }
}
@keyframes slideRight {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}

@-webkit-keyframes scaleIn {
  from { opacity: 0; -webkit-transform: scale(0.9); transform: scale(0.9); }
  to   { opacity: 1; -webkit-transform: scale(1);   transform: scale(1); }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1); }
}

@-webkit-keyframes countUp {
  from { opacity: 0; -webkit-transform: translateY(12px); transform: translateY(12px); }
  to   { opacity: 1; -webkit-transform: translateY(0);    transform: translateY(0); }
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@-webkit-keyframes float {
  0%, 100% { -webkit-transform: translateY(0);   transform: translateY(0); }
  50%       { -webkit-transform: translateY(-8px); transform: translateY(-8px); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@-webkit-keyframes shimmer {
  from { background-position: -200% center; }
  to   { background-position: 200% center; }
}
@keyframes shimmer {
  from { background-position: -200% center; }
  to   { background-position: 200% center; }
}

/* ── Reveal Classes (IntersectionObserver controlled) ── */

.reveal {
  opacity: 0;
  -webkit-transform: translateY(28px);
  -ms-transform: translateY(28px);
  transform: translateY(28px);
  -webkit-transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
                      -webkit-transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left {
  opacity: 0;
  -webkit-transform: translateX(-28px);
  -ms-transform: translateX(-28px);
  transform: translateX(-28px);
  -webkit-transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
                      -webkit-transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right {
  opacity: 0;
  -webkit-transform: translateX(28px);
  -ms-transform: translateX(28px);
  transform: translateX(28px);
  -webkit-transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
                      -webkit-transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale {
  opacity: 0;
  -webkit-transform: scale(0.94);
  -ms-transform: scale(0.94);
  transform: scale(0.94);
  -webkit-transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
                      -webkit-transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Stagger delays */
.reveal-delay-1 { -webkit-transition-delay: 0.1s; transition-delay: 0.1s; }
.reveal-delay-2 { -webkit-transition-delay: 0.2s; transition-delay: 0.2s; }
.reveal-delay-3 { -webkit-transition-delay: 0.3s; transition-delay: 0.3s; }
.reveal-delay-4 { -webkit-transition-delay: 0.4s; transition-delay: 0.4s; }
.reveal-delay-5 { -webkit-transition-delay: 0.5s; transition-delay: 0.5s; }
.reveal-delay-6 { -webkit-transition-delay: 0.6s; transition-delay: 0.6s; }

/* Visible state */
.reveal.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
  opacity: 1;
  -webkit-transform: none;
  -ms-transform: none;
  transform: none;
}

/* ── Hero page-load animations ── */

.hero-label {
  -webkit-animation: slideDown 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
  animation: slideDown 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-title {
  -webkit-animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.35s both;
}

.hero-description {
  -webkit-animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.5s both;
}

.hero-actions {
  -webkit-animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
  animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.65s both;
}

.hero-stat-row {
  -webkit-animation: fadeIn 0.8s ease 0.9s both;
  animation: fadeIn 0.8s ease 0.9s both;
}

.hero-visual {
  -webkit-animation: scaleIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
  animation: scaleIn 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.45s both;
}

.hero-scroll {
  -webkit-animation: fadeIn 1s ease 1.2s both;
  animation: fadeIn 1s ease 1.2s both;
}

/* ── Link underline slide ── */
.link-underline { position: relative; display: -webkit-inline-box; display: -ms-inline-flexbox; display: inline-flex; }

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: currentColor;
  -webkit-transition: width var(--transition-base);
  transition: width var(--transition-base);
}

.link-underline:hover::after { width: 100%; }

/* ── Image zoom ── */
.zoom-wrap { overflow: hidden; border-radius: var(--radius-xl); }

.zoom-wrap img {
  -webkit-transition: -webkit-transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.zoom-wrap:hover img {
  -webkit-transform: scale(1.05);
  -ms-transform: scale(1.05);
  transform: scale(1.05);
}

/* ── Floating ── */
.float-animation {
  -webkit-animation: float 4s ease-in-out infinite;
  animation: float 4s ease-in-out infinite;
}

/* ── Skeleton shimmer ── */
.skeleton {
  background: -webkit-linear-gradient(90deg, #222 0%, #333 50%, #222 100%);
  background: linear-gradient(90deg, #222 0%, #333 50%, #222 100%);
  background-size: 200% auto;
  -webkit-animation: shimmer 1.5s ease infinite;
  animation: shimmer 1.5s ease infinite;
  border-radius: var(--radius-md);
}

/* ── Active nav page indicator ── */
.nav-links a[aria-current="page"] {
  color: var(--color-white);
}

/* ── Button press ── */
.btn:active {
  -webkit-transform: translateY(0) scale(0.97);
  -ms-transform: translateY(0) scale(0.97);
  transform: translateY(0) scale(0.97);
}

/* ── Gradient text shimmer ── */
.gradient-text {
  background: -webkit-linear-gradient(135deg, var(--color-blue) 0%, var(--color-accent) 100%);
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  /* Fallback for browsers without background-clip text */
  color: var(--color-blue);
}

@supports (-webkit-background-clip: text) or (background-clip: text) {
  .gradient-text { color: transparent; }
}

/* ── Hamburger X animation (is-open state) ── */
.nav-hamburger.is-open .hamburger-bar:nth-child(1) {
  -webkit-transform: translateY(7px) rotate(45deg);
  -ms-transform: translateY(7px) rotate(45deg);
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.is-open .hamburger-bar:nth-child(2) {
  opacity: 0;
  -webkit-transform: scaleX(0);
  -ms-transform: scaleX(0);
  transform: scaleX(0);
}

.nav-hamburger.is-open .hamburger-bar:nth-child(3) {
  -webkit-transform: translateY(-7px) rotate(-45deg);
  -ms-transform: translateY(-7px) rotate(-45deg);
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Page progress bar ── */
#nprogress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: -webkit-linear-gradient(left, var(--color-blue), var(--color-accent));
  background: linear-gradient(to right, var(--color-blue), var(--color-accent));
  z-index: 9999;
}

/* ── Keyboard nav focus ring ── */
body.keyboard-nav :focus {
  outline: 3px solid var(--color-blue);
  outline-offset: 3px;
}