:root {
  --tools-nav-bg: #050b14;
  --tools-nav-panel: #0d1420;
  --tools-nav-text: #e6f1ff;
  --tools-nav-muted: #8ea7bd;
  --tools-nav-line: rgba(125, 211, 252, 0.18);
  --tools-nav-accent: #22d3ee;
}

body {
  padding-left: 94px;
}

.tools-nav {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 50;
  display: flex;
  width: 88px;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 14px 10px;
  background: var(--tools-nav-bg);
  border-right: 1px solid var(--tools-nav-line);
  box-shadow: 10px 0 34px rgba(0, 0, 0, 0.32);
  overflow-y: auto;
}

.tools-nav__brand {
  display: grid;
  place-items: center;
  width: 44px;
  aspect-ratio: 1;
  margin-bottom: 8px;
  border-radius: 8px;
  background: linear-gradient(135deg, #22d3ee, #60a5fa);
  color: #03111d;
  font-weight: 900;
  text-decoration: none;
}

.tools-nav__link {
  display: grid;
  place-items: center;
  width: 60px;
  min-height: 54px;
  border: 1px solid var(--tools-nav-line);
  border-radius: 8px;
  background: var(--tools-nav-panel);
  color: var(--tools-nav-text);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.1;
  text-align: center;
  text-decoration: none;
}

.tools-nav__link:hover,
.tools-nav__link:focus {
  border-color: rgba(34, 211, 238, 0.78);
  box-shadow: 0 0 18px rgba(34, 211, 238, 0.14);
  outline: none;
}

.tools-nav__link[aria-current="page"] {
  background: linear-gradient(135deg, #22d3ee, #60a5fa);
  border-color: var(--tools-nav-accent);
  color: #03111d;
}

@media (max-width: 720px) {
  body {
    padding-left: 0;
    padding-bottom: 92px;
  }

  .tools-nav {
    inset: auto 0 0 0;
    width: auto;
    height: 82px;
    flex-direction: row;
    justify-content: flex-start;
    padding: 8px 10px;
    border-top: 1px solid var(--tools-nav-line);
    border-right: 0;
    overflow-x: auto;
    overflow-y: hidden;
  }

  .tools-nav__brand {
    display: none;
  }

  .tools-nav__link {
    flex: 0 0 64px;
    width: 64px;
    min-height: 50px;
    font-size: 0.66rem;
  }
}