/* ==========================================================================
   Universe — layout.css
   Ambient background, header, navigation, footer, page transition
   ========================================================================== */

/* Ambient background ----------------------------------------------------- */
.aura {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.aura__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
}

.aura__glow--violet {
  top: -30vw;
  right: -14vw;
  width: 62vw;
  height: 62vw;
  background: radial-gradient(circle, rgba(124, 58, 237, 0.34), transparent 68%);
}

.aura__glow--cyan {
  bottom: -28vw;
  left: -18vw;
  width: 52vw;
  height: 52vw;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.11), transparent 70%);
}

.aura__glow--pink {
  top: 42%;
  left: 58%;
  width: 30vw;
  height: 30vw;
  background: radial-gradient(circle, rgba(244, 114, 182, 0.07), transparent 70%);
}

.starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  opacity: 0.7;
  pointer-events: none;
}

.site-main,
.site-footer {
  position: relative;
  z-index: 1;
}

.noise {
  position: fixed;
  inset: 0;
  z-index: 9990;
  pointer-events: none;
  opacity: 0.032;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.88' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

/* Page transition -------------------------------------------------------- */
.page-transition {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  background: var(--bg-deep);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 0.35s var(--ease-out),
    visibility 0.35s;
}

html.is-leaving .page-transition {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.page-transition__inner {
  display: grid;
  justify-items: center;
  gap: 1.1rem;
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 0.35s var(--ease-out),
    transform 0.35s var(--ease-out);
}

html.is-leaving .page-transition__inner {
  opacity: 1;
  transform: none;
  transition-delay: 0.08s;
}

.page-transition__mark {
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 600;
  letter-spacing: -0.06em;
  line-height: 1;
}

.page-transition__bar {
  width: 112px;
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.14);
}

.page-transition__bar span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
}

html.is-leaving .page-transition__bar span {
  animation: loadBar 0.48s var(--ease-in-out) forwards;
}

@keyframes loadBar {
  to {
    transform: scaleX(1);
  }
}

/* Page entrance ---------------------------------------------------------- */
.js .site-main {
  animation: pageIn 0.85s var(--ease-out) backwards;
}

html.is-leaving .site-main {
  opacity: 0;
  transition: opacity 0.3s ease;
}

@keyframes pageIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* Header ----------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 200;
  height: var(--header-h);
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.4s var(--ease-out),
    border-color 0.4s var(--ease-out),
    backdrop-filter 0.4s var(--ease-out);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line-soft);
  background: rgba(6, 6, 13, 0.74);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
}

body.nav-open .site-header {
  border-bottom-color: transparent;
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 100%;
}

/* Brand ------------------------------------------------------------------ */
.brand {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  flex: 0 0 auto;
}

.brand__mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--text);
  transition: transform 0.6s var(--ease-out);
}

.brand:hover .brand__mark {
  transform: rotate(24deg);
}

.brand__name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 1;
}

/* Navigation ------------------------------------------------------------- */
.nav {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  margin-left: auto;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 2.1rem;
}

.nav__link {
  position: relative;
  display: inline-block;
  padding: 0.4rem 0;
  color: var(--text-dim);
  font-size: 0.87rem;
  font-weight: 300;
  letter-spacing: -0.005em;
  transition: color 0.3s ease;
}

.nav__link::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 1px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.45s var(--ease-out);
}

.nav__link:hover,
.nav__link.is-active {
  color: var(--text);
}

.nav__link:hover::after,
.nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav__footer {
  display: none;
}

.header__cta {
  flex: 0 0 auto;
  margin-left: 0.25rem;
}

.nav-toggle {
  position: relative;
  z-index: 2;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition:
    border-color 0.3s ease,
    background-color 0.3s ease;
}

.nav-toggle:hover {
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  margin-inline: auto;
  background: var(--text);
  transition:
    transform 0.4s var(--ease-out),
    opacity 0.25s ease;
}

body.nav-open .nav-toggle span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

body.nav-open .nav-toggle span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

/* Footer ----------------------------------------------------------------- */
.site-footer {
  overflow: hidden;
  border-top: 1px solid var(--line-soft);
  background:
    radial-gradient(60% 80% at 50% 100%, rgba(124, 58, 237, 0.16), transparent 70%),
    var(--bg-deep);
}

.footer__top {
  display: grid;
  gap: 3.5rem;
  padding-block: clamp(3.5rem, 7vw, 5.5rem) clamp(2.5rem, 5vw, 4rem);
}

@media (min-width: 900px) {
  .footer__top {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr);
    gap: 5rem;
  }
}

.footer__brand {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 1.4rem;
}

.footer__brand p {
  max-width: 34ch;
  font-size: 0.92rem;
}

.footer__email {
  position: relative;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.2vw, 1.7rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.2;
}

.footer__email::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -0.2rem;
  left: 0;
  height: 1px;
  background: var(--line-strong);
  transform-origin: left;
  transition: transform 0.45s var(--ease-out);
}

.footer__email:hover::after {
  background: var(--gradient);
}

.footer__nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem 2rem;
}

@media (min-width: 620px) {
  .footer__nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.footer__col {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.footer__heading {
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.footer__col ul {
  display: grid;
  gap: 0.55rem;
}

.footer__col a,
.footer__col address {
  color: var(--text-dim);
  font-size: 0.87rem;
  font-style: normal;
  line-height: 1.55;
  transition: color 0.3s ease;
}

.footer__col a:hover {
  color: var(--text);
}

.footer__col a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.footer__col a svg {
  width: 11px;
  height: 11px;
  opacity: 0.5;
  transition: transform 0.35s var(--ease-out);
}

.footer__col a:hover svg {
  transform: translate(1px, -1px);
}

.footer__word {
  overflow: hidden;
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(1.5rem, 3vw, 2.5rem);
  -webkit-user-select: none;
  user-select: none;
}

.footer__word span {
  display: block;
  background: linear-gradient(180deg, rgba(243, 240, 255, 0.15), rgba(243, 240, 255, 0.02) 78%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-family: var(--font-display);
  font-size: clamp(4.6rem, 19.5vw, 17rem);
  font-weight: 600;
  letter-spacing: -0.075em;
  line-height: 0.74;
  text-align: center;
  white-space: nowrap;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-block: 1.5rem 2rem;
  border-top: 1px solid var(--line-soft);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.59rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.footer__to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
  transition: color 0.3s ease;
}

.footer__to-top:hover {
  color: var(--text);
}

.footer__to-top span {
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  transition:
    border-color 0.3s ease,
    transform 0.4s var(--ease-out);
}

.footer__to-top:hover span {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

/* Responsive navigation -------------------------------------------------- */
@media (max-width: 960px) {
  :root {
    --header-h: 68px;
  }

  .header__cta {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
    gap: 2rem;
    margin: 0;
    padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2.25rem;
    overflow-y: auto;
    background: rgba(5, 5, 11, 0.97);
    -webkit-backdrop-filter: blur(24px);
    backdrop-filter: blur(24px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition:
      opacity 0.4s var(--ease-out),
      transform 0.5s var(--ease-out),
      visibility 0.4s;
  }

  body.nav-open .nav {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.15rem;
    margin-top: auto;
  }

  .nav__link {
    padding: 0.3rem 0;
    font-family: var(--font-display);
    font-size: clamp(1.9rem, 8.5vw, 2.9rem);
    font-weight: 500;
    letter-spacing: -0.04em;
    line-height: 1.15;
  }

  .nav__link::after {
    height: 2px;
  }

  .nav__footer {
    display: grid;
    justify-items: start;
    gap: 1.5rem;
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--line-soft);
  }

  .nav__footer .btn {
    min-width: 200px;
  }

  .nav__contact {
    display: grid;
    gap: 0.45rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
  }

  .nav__contact a {
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.95rem;
    letter-spacing: 0;
    text-transform: none;
  }

  .nav__socials {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-top: 0.35rem;
  }

  .nav__socials a {
    color: var(--text-dim);
    font-size: 0.78rem;
    letter-spacing: 0;
    text-transform: none;
  }

  .nav__socials a:hover {
    color: var(--text);
  }
}

@media (max-width: 480px) {
  .footer__nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .footer__bottom {
    justify-content: flex-start;
  }

  .footer__to-top {
    margin-left: auto;
  }
}