:root {
  --bg: #fff;
  --surface: #f9f8f7;
  --surface2: #f0efed;
  --text: #2c2c2b;
  --muted: #716f6b;
  --border: #e6e5e3;
  --blue: #2783de;
  --blueSoft: #e5f2fc;
  --green: #46a171;
  --code: #191919;
  --codeText: #e9edf2;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.05), 0 4px 12px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Arial,
    sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

.wrap {
  width: min(1080px, calc(100% - 40px));
  margin: auto;
  padding: 30px 0 46px;
}

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 28px;
  align-items: center;
  padding: 30px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: linear-gradient(135deg, #fff 35%, var(--blueSoft));
  box-shadow: var(--shadow);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--blue);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
}

h1 {
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.02;
  letter-spacing: -0.045em;
  margin: 12px 0 16px;
  max-width: 720px;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 620px;
}

.heroCard {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(39, 131, 222, 0.22);
  border-radius: 10px;
  padding: 20px;
}

.heroCard strong {
  display: block;
  font-size: 42px;
  line-height: 1;
  color: var(--blue);
}

.heroCard span {
  color: var(--muted);
  font-size: 14px;
}

.controls {
  position: sticky;
  top: 0;
  z-index: 5;
  margin: 22px 0 18px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--border);
  border-radius: 10px;
  backdrop-filter: blur(10px);
  display: flex;
  gap: 10px;
  align-items: center;
}

.search {
  flex: 1;
  min-width: 0;
  border: 0;
  background: var(--surface);
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--text);
  font: inherit;
  outline: none;
}

.search:focus {
  box-shadow: 0 0 0 3px rgba(39, 131, 222, 0.18);
}

.filter {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}

.filter:hover,
.filter.active {
  border-color: var(--blue);
  background: var(--blueSoft);
  color: #145c9f;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #fff;
  overflow: hidden;
  transition: 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.cardHead {
  padding: 18px 20px 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.num {
  font:
    700 13px/1 Menlo,
    Consolas,
    monospace;
  color: var(--blue);
  background: var(--blueSoft);
  padding: 7px 8px;
  border-radius: 6px;
}

.card h2 {
  margin: 0;
  font-size: 21px;
  letter-spacing: -0.02em;
}

.cardBody {
  padding: 0 20px 20px;
}

.card p {
  margin: 7px 0;
  color: var(--muted);
}

code {
  font-family: Menlo, Consolas, monospace;
  font-size: 0.9em;
}

pre {
  margin: 14px 0 0;
  padding: 15px;
  border-radius: 8px;
  background: var(--code);
  color: var(--codeText);
  overflow: auto;
  font-size: 13px;
  line-height: 1.55;
}

.kw {
  color: #82aaff;
}

.fn {
  color: #c3e88d;
}

.str {
  color: #ecc48d;
}

.tip {
  margin-top: 14px;
  padding: 11px 12px;
  border-left: 3px solid var(--green);
  background: #e8f1ec;
  color: #2f684d;
  font-size: 14px;
}

.empty {
  display: none;
  text-align: center;
  padding: 40px;
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 10px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.kbd {
  font-family: Menlo, Consolas, monospace;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 5px;
  color: var(--text);
}

@media (max-width: 760px) {
  .wrap {
    width: min(100% - 28px, 1080px);
    padding-top: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .heroCard {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .controls {
    flex-wrap: wrap;
    overflow: visible;
  }

  .search {
    flex: 1 0 100%;
  }

  .filter {
    flex: 1;
    white-space: nowrap;
    padding: 10px 7px;
    font-size: 14px;
  }

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

  .footer {
    flex-direction: column;
  }

  .lead {
    font-size: 16px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191919;
    --surface: #202020;
    --surface2: #383836;
    --text: #fff;
    --muted: rgba(255, 255, 255, 0.65);
    --border: rgba(255, 255, 255, 0.2);
    --blue: #5e9fe8;
    --blueSoft: rgba(94, 159, 232, 0.12);
    --green: #72bc8f;
    --code: #111;
    --codeText: #edf2f7;
  }

  .hero {
    background: linear-gradient(135deg, #202020 35%, rgba(94, 159, 232, 0.15));
  }

  .heroCard,
  .card,
  .filter {
    background: #202020;
  }

  .controls {
    background: rgba(25, 25, 25, 0.92);
  }

  .tip {
    background: rgba(114, 188, 143, 0.12);
    color: #a7d6b9;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto;
  }

  .card {
    transition: none;
  }
}