:root {
  --bg: #ffffff;
  --bg-soft: #f6f8fb;
  --text: #111827;
  --text-soft: #4b5563;
  --border: #e5e7eb;
  --primary: #111827;
  --primary-hover: #374151;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}

.container {
  width: min(960px, 92vw);
  margin: 0 auto;
  padding: 28px 0 56px;
}

.hero {
  text-align: center;
  padding: 20px 0 16px;
}

.hero-logo {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

h1 {
  margin: 14px 0 8px;
  font-size: 2rem;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

p {
  margin: 0;
  color: var(--text-soft);
}

.hero p {
  max-width: 720px;
  margin: 0 auto;
}

.hero-actions {
  margin-top: 18px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  text-decoration: none;
  font-weight: 600;
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.btn-secondary {
  color: var(--text);
  background: var(--bg);
}

.section {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg);
}

.grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.grid li {
  border: 1px solid var(--border);
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 14px;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

pre {
  margin: 0;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  overflow-x: auto;
}

code {
  font-family: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
}

a {
  color: inherit;
}

@media (max-width: 760px) {
  .grid,
  .split {
    grid-template-columns: 1fr;
  }
}