:root {
  color-scheme: dark;
  --bg: #070b13;
  --panel: #0d1423;
  --line: rgba(117, 145, 185, 0.24);
  --text: #eef6ff;
  --muted: #8ea1bb;
  --cyan: #39d7ff;
  --violet: #8b5cf6;
  --green: #37e38b;
  --amber: #f8bd48;
  font-family: Inter, "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 8%, rgba(57, 215, 255, 0.14), transparent 30rem),
    radial-gradient(circle at 85% 0%, rgba(139, 92, 246, 0.16), transparent 28rem),
    linear-gradient(135deg, #060912 0%, #0a1020 50%, #07101a 100%);
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 54px;
}

.nav strong {
  font-size: 18px;
}

.nav div {
  display: flex;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.hero {
  padding: 76px 0 40px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 7vw, 78px);
  line-height: 1.04;
}

.lead {
  max-width: 720px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.searchBox {
  display: grid;
  grid-template-columns: 1fr 110px;
  gap: 10px;
  max-width: 720px;
  margin-top: 30px;
}

input,
button {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(13, 20, 35, 0.78);
  color: var(--text);
}

input {
  padding: 0 14px;
}

button {
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease;
}

button:hover {
  border-color: rgba(57, 215, 255, 0.74);
  background: rgba(22, 36, 59, 0.92);
}

input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(57, 215, 255, 0.36);
  outline-offset: 2px;
}

.categories {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.category {
  padding: 0 16px;
}

.category.active {
  border-color: rgba(57, 215, 255, 0.78);
  background: linear-gradient(135deg, rgba(29, 78, 216, 0.82), rgba(139, 92, 246, 0.42));
}

.toolsGrid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.toolCard {
  display: grid;
  gap: 14px;
  min-height: 230px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(17, 27, 45, 0.92), rgba(9, 15, 27, 0.92));
  box-shadow: 0 20px 70px rgba(0, 0, 0, 0.28);
}

.toolTop {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.toolCard h2 {
  margin: 0;
  font-size: 20px;
}

.tag {
  width: fit-content;
  padding: 5px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--green);
  font-size: 12px;
  font-weight: 700;
}

.tag.external {
  color: var(--amber);
}

.toolCard p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.toolCard a {
  align-self: end;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border: 1px solid rgba(57, 215, 255, 0.54);
  border-radius: 7px;
  background: rgba(14, 23, 38, 0.76);
  color: #ffffff;
  font-weight: 700;
}

.empty {
  margin: 28px 0 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .toolsGrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .nav,
  .searchBox {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 42px;
  }

  .toolsGrid {
    grid-template-columns: 1fr;
  }
}