html {
  background: #d8d8d8;
}

body {
  margin: 0;
  color: #111;
  font: 16px/1.5 Arial, Helvetica, sans-serif;
}

.page {
  width: min(1000px, calc(100% - 40px));
  margin: 22px auto;
  background: #fff;
  border: 1px solid #b9b9b9;
  padding: 20px 24px 30px;
  box-sizing: border-box;
}

.site-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
}

h1 {
  margin: 0;
  font-size: 42px;
  line-height: 1.05;
}

.subtitle {
  margin: 6px 0 0;
  color: #555;
}

.lang-switch {
  display: flex;
  gap: 8px;
}

.lang-btn {
  border: 1px solid #888;
  background: #efefef;
  color: #111;
  padding: 6px 10px;
  font: inherit;
  cursor: pointer;
}

.lang-btn.active {
  background: #1c4db5;
  color: #fff;
  border-color: #1c4db5;
}

.top-nav {
  margin: 18px 0 22px;
  padding: 8px 0;
  border-top: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
}

.top-nav a {
  margin-right: 16px;
  color: #0645ad;
  text-decoration: underline;
}

.hero {
  margin-bottom: 26px;
}

.hero img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #c9c9c9;
}

.hero-text {
  padding-top: 10px;
}

.hero-text h2 {
  margin: 0 0 8px;
}

section {
  margin-top: 26px;
}

h2 {
  font-size: 28px;
  margin: 0 0 10px;
}

h3 {
  font-size: 21px;
  margin: 0 0 10px;
}

.info-table {
  border-collapse: collapse;
  width: 100%;
  max-width: 560px;
  margin-bottom: 10px;
}

.info-table th,
.info-table td {
  text-align: left;
  vertical-align: top;
  padding: 6px 10px 6px 0;
}

.info-table th {
  width: 140px;
  color: #555;
  font-weight: normal;
}

code {
  font-family: Consolas, "Courier New", monospace;
  background: #f2f2f2;
  border: 1px solid #ddd;
  padding: 2px 5px;
}

.rules-list,
.warp-list,
.plugin-list {
  padding-left: 22px;
  margin: 0;
}

.warning {
  margin-top: 10px;
  font-weight: bold;
}

.gallery-category + .gallery-category {
  margin-top: 20px;
}

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

.gallery-grid figure {
  margin: 0;
}

.gallery-grid img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #c9c9c9;
}

.site-footer {
  margin-top: 30px;
  border-top: 1px solid #ccc;
  padding-top: 10px;
  color: #666;
}

@media (max-width: 740px) {
  .page {
    width: 100%;
    margin: 0;
    border: 0;
    padding: 16px;
  }

  .site-header {
    flex-direction: column;
  }

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

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 19px;
  }
}