:root {
  --primary: #2c3e50;
  --accent: #3498db;
  --bg: #f4f6f8;
  --card-bg: #ffffff;
  --text: #333333;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  background: var(--primary);
  color: #fff;
  padding: 1rem 2rem;
}

.site-header h1 {
  font-size: 1.4rem;
}

.site-footer {
  background: var(--primary);
  color: #ccc;
  text-align: center;
  padding: 1rem;
  margin-top: auto;
  font-size: 0.9rem;
}

.container {
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
  width: 100%;
}

.card {
  background: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  padding: 2rem;
}

.card h1 {
  color: var(--primary);
  margin-bottom: 1rem;
}

.card p {
  margin-bottom: 0.8rem;
  line-height: 1.6;
}

code {
  background: #eef2f5;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
}

button {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.2s;
}

button:hover {
  background: #217dbb;
}

pre {
  background: #2c3e50;
  color: #7ecb7e;
  padding: 1rem;
  border-radius: 6px;
  margin-top: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
}