:root {
  --primary: #0d6efd;
  --text-dark: #111;
  --text-muted: #555;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Poppins', sans-serif;
  background: #ffffff;
  color: var(--text-dark);
}

/* MAIN LAYOUT */
.error-wrapper {
  max-width: 1300px;
  margin: auto;
  padding: 80px 40px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 60px;
}

/* CONTENT */
.logo {
  width: 90px;
  margin-bottom: 30px;
}

.error-content h1 {
  font-size: 96px;
  font-weight: 700;
  color: var(--primary);
  animation: float 3.5s ease-in-out infinite;
}

.error-content h2 {
  font-size: 34px;
  margin-bottom: 12px;
}

.error-content p {
  color: var(--text-muted);
  max-width: 420px;
  margin-bottom: 24px;
}

.links {
  display: flex;
  gap: 20px;
}

.link {
  text-decoration: none;
  font-weight: 500;
  color: var(--primary);
  position: relative;
}

.link::after {
  content: '';
  width: 0;
  height: 2px;
  background: var(--primary);
  position: absolute;
  left: 0;
  bottom: -4px;
  transition: 0.3s;
}

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

/* VISUAL */
.error-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.circle {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(13,110,253,0.15), transparent);
  animation: pulse 4s infinite;
}

/* BRANDS */
.brands {
  max-width: 1300px;
  margin: 40px auto 80px;
  padding: 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
}

.brands img {
  max-height: 50px;
  filter: grayscale(100%);
  opacity: 0.75;
  transition: 0.3s;
}

.brands img:hover {
  filter: grayscale(0);
  opacity: 1;
}

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

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1); opacity: 0.6; }
}

/* RESPONSIVE */
@media (max-width: 900px) {
  .error-wrapper {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .links {
    justify-content: center;
  }

  .brands {
    justify-content: center;
  }
}
/* From Uiverse.io by Allyhere */ 
.btn-donate {
  --clr-font-main: hsla(0 0% 20% / 100);
  --btn-bg-1: hsla(194 100% 69% / 1);
  --btn-bg-2: hsla(217 100% 56% / 1);
  --btn-bg-color: hsla(360 100% 100% / 1);
  --radii: 0.5em;
  cursor: pointer;
  padding: 0.9em 1.4em;
  min-width: 120px;
  min-height: 44px;
  font-size: var(--size, 1rem);
  font-weight: 500;
  transition: 0.8s;
  background-size: 280% auto;
  background-image: linear-gradient(
    325deg,
    var(--btn-bg-2) 0%,
    var(--btn-bg-1) 55%,
    var(--btn-bg-2) 90%
  );
  border: none;
  border-radius: var(--radii);
  color: var(--btn-bg-color);
  box-shadow:
    0px 0px 20px rgba(71, 184, 255, 0.5),
    0px 5px 5px -1px rgba(58, 125, 233, 0.25),
    inset 4px 4px 8px rgba(175, 230, 255, 0.5),
    inset -4px -4px 8px rgba(19, 95, 216, 0.35);
}

.btn-donate:hover {
  background-position: right top;
}

.btn-donate:is(:focus, :focus-visible, :active) {
  outline: none;
  box-shadow:
    0 0 0 3px var(--btn-bg-color),
    0 0 0 6px var(--btn-bg-2);
}

@media (prefers-reduced-motion: reduce) {
  .btn-donate {
    transition: linear;
  }
}