/* ============================================================
   layout.css — Loader, navbar, menu, footer, cursor, fixed UI
   ============================================================ */

/* ---------- Preloader ---------- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: grid;
  place-items: center;
  background: var(--bg-0);
  transition: opacity 0.6s var(--ease), visibility 0.6s;
}

.loader.is-done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__mark {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.loader__mark .loader__dot {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: var(--accent);
  animation: loader-pulse 1.1s var(--ease) infinite;
}

.loader__bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: transparent;
}

.loader__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--accent);
  animation: loader-fill 1.4s var(--ease) forwards;
}

@keyframes loader-fill {
  to {
    width: 100%;
  }
}

@keyframes loader-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.6);
  }
}

/* ---------- Page transition overlay ---------- */
.transition {
  position: fixed;
  inset: 0;
  z-index: 2500;
  background: var(--bg-0);
  transform: translateY(101%);
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.55s var(--ease), visibility 0s 0.55s;
}

.transition.is-active {
  transform: translateY(0);
  visibility: visible;
  pointer-events: all;
  transition: transform 0.55s var(--ease);
}

/* ---------- Custom cursor ---------- */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 4000;
  border-radius: 50%;
  pointer-events: none;
  will-change: transform;
}

.cursor-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  translate: -50% -50%;
}

.cursor-ring {
  width: 42px;
  height: 42px;
  border: 1.5px solid var(--accent);
  opacity: 0.55;
  translate: -50% -50%;
  transition: width 0.3s var(--ease), height 0.3s var(--ease),
    background-color 0.3s var(--ease), opacity 0.3s var(--ease);
}

.cursor-ring.is-hover {
  width: 64px;
  height: 64px;
  background: rgba(200, 255, 0, 0.12);
  opacity: 1;
}

.cursor-ring.is-down {
  width: 28px;
  height: 28px;
}

@media (hover: none), (pointer: coarse) {
  .cursor-dot,
  .cursor-ring {
    display: none;
  }
}

/* ---------- Navbar ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    backdrop-filter var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom-color: var(--line-dark);
  box-shadow: 0 10px 40px -18px rgba(0, 0, 0, 0.6);
}

.nav__inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.nav__brand svg {
  width: 26px;
  height: 26px;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2.4rem);
}

.nav__link {
  position: relative;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted-dark);
  transition: color var(--t-fast) var(--ease);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--t-fast) var(--ease);
}

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

.nav__link:hover::after,
.nav__link.is-active::after {
  width: 100%;
}

.nav__burger {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid var(--line-dark);
  place-items: center;
  transition: background var(--t-fast) var(--ease);
}

.nav__burger:hover {
  background: rgba(255, 255, 255, 0.08);
}

.nav__burger svg {
  width: 22px;
  height: 22px;
}

.nav__burger-icon {
  grid-area: 1 / 1;
  transition: transform var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

.nav__burger-icon--close {
  opacity: 0;
  transform: rotate(-90deg) scale(0.4);
}

.nav__burger.is-active .nav__burger-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0.4);
}

.nav__burger.is-active .nav__burger-icon--close {
  opacity: 1;
  transform: none;
}

/* ---------- Mobile menu ---------- */
.menu {
  position: fixed;
  inset: 0;
  z-index: 2200;
  background: var(--bg-0);
  display: flex;
  flex-direction: column;
  padding: calc(var(--nav-h) + 2rem) var(--gutter) 3rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  transition: opacity 0.45s var(--ease), visibility 0s 0.45s;
}

.menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 0.45s var(--ease);
}

/* Lock page scroll while the mobile menu is open */
html.menu-open,
html.menu-open body {
  overflow: hidden;
  overscroll-behavior: none;
}

.menu__close {
  position: absolute;
  top: calc((var(--nav-h) - 46px) / 2);
  right: var(--gutter);
  width: 46px;
  height: 46px;
  border-radius: 12px;
  border: 1px solid var(--line-dark);
  display: grid;
  place-items: center;
  color: var(--text-dark);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}

.menu__close:hover {
  background: var(--accent);
  color: var(--accent-ink);
  transform: rotate(90deg);
}

.menu__close svg {
  width: 20px;
  height: 20px;
}

.menu__list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.menu__link {
  font-family: var(--font-display);
  font-size: clamp(2rem, 9vw, 3.4rem);
  font-weight: 600;
  line-height: 1.15;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-block: 0.35rem;
  opacity: 0;
  transform: translateY(28px);
  transition: color var(--t-fast) var(--ease), transform 0.5s var(--ease),
    opacity 0.5s var(--ease);
}

.menu.is-open .menu__link {
  opacity: 1;
  transform: none;
}

.menu.is-open .menu__link:nth-child(1) { transition-delay: 60ms; }
.menu.is-open .menu__link:nth-child(2) { transition-delay: 120ms; }
.menu.is-open .menu__link:nth-child(3) { transition-delay: 180ms; }
.menu.is-open .menu__link:nth-child(4) { transition-delay: 240ms; }
.menu.is-open .menu__link:nth-child(5) { transition-delay: 300ms; }
.menu.is-open .menu__link:nth-child(6) { transition-delay: 360ms; }

.menu__link span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.menu__link:hover,
.menu__link.is-active {
  color: var(--accent);
}

.menu.is-open .menu__link:hover {
  transform: translateX(8px);
  transition-delay: 0s;
}

.menu__link-arrow {
  align-self: center;
  flex: none;
  width: 0.62em;
  height: 0.62em;
  margin-left: auto;
  color: var(--accent);
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity var(--t-fast) var(--ease), transform 0.3s var(--ease);
}

.menu__link:hover .menu__link-arrow,
.menu__link:focus-visible .menu__link-arrow {
  opacity: 1;
  transform: translateX(0);
}

.menu__foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted-dark);
  opacity: 0;
  transition: opacity 0.5s var(--ease);
}

.menu.is-open .menu__foot {
  opacity: 1;
  transition-delay: 360ms;
}

.menu__cta {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 2rem;
  padding: 0.95rem 1.6rem;
  border-radius: 999px;
  border: 1px solid var(--line-dark-strong);
  color: var(--text-dark);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(20px);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease), transform 0.5s var(--ease),
    opacity 0.5s var(--ease);
}

.menu.is-open .menu__cta {
  opacity: 1;
  transform: none;
  transition-delay: 400ms;
}

.menu__cta svg {
  width: 18px;
  height: 18px;
}

.menu.is-open .menu__cta:hover,
.menu.is-open .menu__cta:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  transform: translateX(6px);
  transition-delay: 0s;
}

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 900;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 14px 34px -10px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease),
    visibility var(--t-fast);
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  transform: translateY(-4px);
}

.to-top svg {
  width: 20px;
  height: 20px;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-0);
  color: var(--text-dark);
  border-top: 1px solid var(--line-dark);
  position: relative;
  overflow: hidden;
}

.footer__glow {
  position: absolute;
  inset: auto -10% -45% -10%;
  height: 80%;
  background: radial-gradient(closest-side, rgba(139, 92, 246, 0.16), transparent 70%);
  pointer-events: none;
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.4fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  padding-block: clamp(3.5rem, 7vw, 6rem);
  position: relative;
}

.footer__brand p {
  color: var(--muted-dark);
  max-width: 32ch;
  margin-top: 1.1rem;
  font-size: 0.95rem;
}

.footer__socials {
  display: flex;
  gap: 0.7rem;
  margin-top: 1.6rem;
}

.footer__social {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line-dark);
  display: grid;
  place-items: center;
  color: var(--muted-dark);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.footer__social:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-4px);
  background: rgba(200, 255, 0, 0.06);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-dark);
  margin-bottom: 1.2rem;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer__links a {
  color: var(--text-dark);
  opacity: 0.82;
  font-size: 0.95rem;
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease),
    color var(--t-fast) var(--ease);
}

.footer__links a:hover {
  opacity: 1;
  color: var(--accent);
  transform: translateX(4px);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 1.6rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted-dark);
}

.footer__legal {
  display: flex;
  gap: 1.6rem;
}

.footer__legal a:hover {
  color: var(--accent);
}

.footer__wordmark {
  display: block;
  width: 100%;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(4rem, 16vw, 13rem);
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: rgba(245, 245, 242, 0.06);
  -webkit-text-stroke: 1px rgba(245, 245, 242, 0.16);
  pointer-events: none;
  margin-top: 1rem;
}