:root {
  --footer-bg: #272727;
  --footer-text: #adadb3;
  --footer-text-hover: #ffffff;
  --footer-title: #ffffff;
  --footer-divider: rgba(255, 255, 255, 0.1);
  --footer-gap: clamp(2rem, 5vw, 4rem);
}

/* Wrapper */
.footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
}

.footer a:focus-visible {
  outline: 2px solid var(--nav-outline-color);
  outline-offset: 2px;
}

.footer__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-4);
  padding-block: var(--space-16);
}

/* Top */
.footer__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--footer-gap);
}

/* Brand */
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__logo {
  display: inline-block;
  width: fit-content;
}

.footer__logo:hover {
  opacity: 0.8;
}

.footer__tagline {
  max-width: 32ch;
  color: var(--footer-text);
}

/* Navigation */
.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--footer-gap);
}

.footer__nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer__nav-group ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__nav-title {
  display: block;
  margin-bottom: var(--space-4);
  font-size: var(--font-size-xxs);
  letter-spacing: var(--letter-spacing-wide);
  color: var(--footer-title);
}

.footer__nav-group a {
  font-size: var(--font-size-xs);
  color: var(--footer-text);
  transition: color 0.2s ease;
}

.footer__nav-group a:hover {
  color: var(--footer-text-hover);
}

/* Divider */
.footer__divider {
  height: 1px;
  background: var(--footer-divider);
  margin: 2.5rem 0;
}

/* Bottom */
.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__copy {
  font-size: 0.85rem;
  color: var(--footer-text);
}

/* Social */
.footer__social {
  display: flex;
  gap: 1rem;
}

.footer__social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--footer-divider);
  color: var(--footer-text);
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.footer__social a:hover {
  color: var(--footer-text-hover);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

/* Tablet */
@media (min-width: 768px) {
  .footer__top {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .footer__nav {
    justify-self: end;
    text-align: left;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .footer__inner {
    padding-inline: var(--space-6);
  }

  .footer__top {
    grid-template-columns: 1fr auto;
  }

  .footer__nav {
    justify-self: end;
  }
}