body {
  margin: 0;
  padding: 24px;
  background: #111419;
  color: #eef2f8;
  font-family: Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
}

main {
  max-width: 1120px;
  margin: 0 auto;
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  margin: 0 0 8px;
  font-size: 26px;
}

h2 {
  margin: 32px 0 12px;
  font-size: 20px;
}

h3 {
  margin: 0 0 8px;
  font-size: 15px;
}

p {
  margin: 8px 0;
  color: #cdd5e0;
}

code {
  color: #e3e7ef;
  font-family: Consolas, monospace;
  font-size: 13px;
}

a {
  color: #9db0ff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.top-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 26px;
}

.top-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 7px 10px;
  background: #1b1f27;
  border: 1px solid #333b49;
  border-radius: 6px;
  color: #eef2f8;
  font-size: 12px;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px;
  margin-top: 14px;
}

.mode-card {
  display: flex;
  flex-direction: column;
  padding: 13px 14px;
  background: #171c24;
  border: 1px solid #2d3541;
  border-radius: 8px;
}

.mode-description {
  min-height: 92px;
  margin: 6px 0 10px;
  font-size: 13px;
}

.sample-lines {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: auto;
  padding: 10px;
  background: #20262a;
  border: 1px solid #2b3237;
  border-radius: 8px;
}

.sample-line {
  display: grid;
  grid-template-columns: 44px 16px 1fr;
  gap: 6px;
  align-items: center;
  min-height: 20px;
}

.sample-sr {
  color: #b7c0cd;
  font-family: Consolas, monospace;
  font-size: 12px;
  text-align: right;
}

.sample-line img {
  width: 16px;
  height: 16px;
}

.sample-title {
  font-weight: bold;
}

.note-list {
  margin: 8px 0;
  padding-left: 20px;
  color: #cdd5e0;
}

@media (max-width: 680px) {
  body {
    padding: 16px;
  }

  .mode-description {
    min-height: 0;
  }

  .sample-line {
    grid-template-columns: 38px 16px 1fr;
  }
}