.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--elev);
  border: 1px solid var(--stroke-strong);
  color: var(--fg);
  text-decoration: none;
  transform: translateY(-160%);
  transition: transform var(--dur) var(--ease-out);
}

.skip-link:focus {
  transform: translateY(0);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.72rem 1.25rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: var(--step--1);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #6366f1));
  color: #fff;
  border-color: color-mix(in srgb, var(--accent) 55%, transparent);
  box-shadow: 0 12px 36px color-mix(in srgb, var(--accent) 35%, transparent);
}

.btn-primary:hover {
  filter: brightness(1.05);
}

.btn-ghost {
  background: var(--accent-soft);
  color: var(--fg);
  border-color: var(--stroke-strong);
}

.btn-full {
  width: 100%;
}

.btn-ico {
  gap: var(--space-2);
  align-items: center;
  justify-content: center;
}

.btn-ico .svg-ico {
  flex-shrink: 0;
  display: block;
}

.btn-primary .svg-ico {
  color: inherit;
}

.link-arrow {
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.link-arrow:hover {
  text-decoration: underline;
}

.link-arrow--ico {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  line-height: 1.2;
  vertical-align: middle;
}

.link-arrow--ico .link-arrow__ico {
  flex-shrink: 0;
  display: block;
}

.footer-msg-btn {
  background: transparent;
  border: 1px solid var(--stroke-strong);
  border-radius: var(--radius-pill);
  padding: 0.45rem 1rem;
  cursor: pointer;
  color: var(--fg-muted);
  font-size: var(--step--1);
}

.footer-msg-btn:hover {
  color: var(--fg);
  border-color: var(--accent);
}