:root {
  --bg: #f5f8fc;
  --panel: #ffffff;
  --panel-strong: #e8eef6;
  --border: #c9d4e2;
  --text: #122033;
  --muted: #4f5f73;
  --accent: #0b6bcb;
  --accent-dark: #084f98;
  --code-bg: #0f172a;
  --code-border: #1e293b;
  --code-text: #e2e8f0;
  --code-muted: #93a4ba;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
}

a {
  color: var(--accent-dark);
  text-decoration: none;
}

a:hover {
  color: var(--accent);
}

.site-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 24px 72px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 24px;
  align-items: center;
  justify-content: space-between;
  margin: 12px 0 36px;
  padding: 18px 22px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.06);
  backdrop-filter: blur(8px);
}

.site-brand {
  color: var(--text);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--text);
}

.site-main {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 28px;
  box-shadow: 0 24px 56px rgba(15, 23, 42, 0.08);
  padding: 42px 48px 56px;
}

.site-main h1:first-child,
.site-main p:first-child img {
  margin-top: 0;
}

h1, h2, h3 {
  color: var(--text);
  line-height: 1.15;
}

h1 {
  font-size: 2.8rem;
  margin: 0 0 1rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: 2.5rem;
}

h3 {
  font-size: 1.08rem;
  margin-top: 1.5rem;
}

p, li {
  font-size: 1.02rem;
}

code, pre {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

code {
  background: #eef4fb;
  border: 1px solid #d8e3ef;
  border-radius: 8px;
  padding: 0.12rem 0.4rem;
}

pre {
  background: linear-gradient(180deg, #111b31 0%, #0f172a 100%);
  border: 1px solid var(--code-border);
  border-radius: 18px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  color: var(--code-text);
  overflow-x: auto;
  padding: 22px 22px 20px;
  position: relative;
}

pre code {
  background: transparent;
  border: 0;
  color: var(--code-text);
  padding: 0;
}

.copy-button {
  appearance: none;
  background: rgba(148, 163, 184, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.28);
  border-radius: 999px;
  color: var(--code-text);
  cursor: pointer;
  font: inherit;
  font-size: 0.82rem;
  padding: 0.28rem 0.7rem;
  position: absolute;
  right: 14px;
  top: 12px;
}

.copy-button:hover {
  background: rgba(148, 163, 184, 0.18);
  border-color: rgba(148, 163, 184, 0.42);
}

blockquote {
  border-left: 4px solid #b8c6d6;
  color: var(--muted);
  margin: 1.5rem 0;
  padding-left: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
}

th, td {
  border: 1px solid var(--border);
  padding: 0.7rem 0.8rem;
  text-align: left;
}

th {
  background: #f1f6fb;
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

@media (max-width: 720px) {
  .site-shell {
    padding: 18px 16px 56px;
  }

  .site-header {
    padding: 14px 16px;
  }

  .site-main {
    border-radius: 22px;
    padding: 28px 20px 38px;
  }

  h1 {
    font-size: 2.15rem;
  }
}