/* ============================================================
   404.css — Error page
   ============================================================ */
.e404 {
  position: relative;
  min-height: 100vh;
  padding: 9rem 0 5rem;
  background:
    radial-gradient(ellipse 60% 80% at 85% 50%, rgba(201,236,102,0.18) 0%, transparent 55%),
    radial-gradient(ellipse 40% 60% at 10% 80%, rgba(80,110,255,0.10) 0%, transparent 60%),
    linear-gradient(180deg, #0c1020 0%, var(--gx-darker) 70%);
  color: var(--gx-white);
  overflow: hidden;
  isolation: isolate;
  display: flex;
  align-items: center;
}

.e404::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(201,236,102,0.06) 1px, transparent 1.5px),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 24px 24px, 60px 60px, 60px 60px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000 30%, transparent 100%);
  pointer-events: none;
}

.e404__inner {
  text-align: center;
  max-width: 44rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
}

.e404__eyebrow {
  color: var(--gx-lime);
  letter-spacing: 0.18em;
  font-size: 0.75rem;
}

.e404__code {
  font-family: var(--gx-font-heading);
  font-size: clamp(7rem, 18vw, 13rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0;
  color: var(--gx-white);
  text-shadow: 0 0 60px rgba(201,236,102,0.2);
}

.e404__zero {
  color: var(--gx-lime);
  display: inline-block;
  animation: e404Spin 6s linear infinite;
}

@keyframes e404Spin {
  to { transform: rotate(360deg); }
}

.e404__title {
  font-family: var(--gx-font-heading);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.02em;
}

.e404__desc {
  max-width: 32rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.65;
  margin: 0 0 1rem;
}

.e404__search {
  position: relative;
  width: 100%;
  max-width: 32rem;
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 100px;
  padding: 0.4rem 0.4rem 0.4rem 3rem;
  transition: border-color 0.2s, background 0.2s;
}

.e404__search:focus-within {
  border-color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.1);
}

.e404__search-icon {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.4);
  pointer-events: none;
}

.e404__search-input {
  flex: 1;
  height: 2.75rem;
  background: transparent;
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--gx-white);
}
.e404__search-input::placeholder { color: rgba(255,255,255,0.35); }

.e404__quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.5rem 1rem;
  margin-top: 0.5rem;
}

.e404__quick-label {
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.e404__quick-link {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.75);
  padding: 0.25rem 0.65rem;
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 100px;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.e404__quick-link:hover {
  color: var(--gx-dark);
  background: var(--gx-lime);
  border-color: var(--gx-lime);
}

.e404__cta { margin-top: 1.5rem; }

@media (max-width: 768px) {
  .e404 { padding: 7rem 0 4rem; }
  .e404__search { padding-left: 2.6rem; }
}