* {
  box-sizing: border-box;
}

:root {
  --bg: #f7f7f2;
  --card: #ffffff;
  --text: #111827;
  --muted: #4b5563;
  --accent: #0f766e;
  --border: #e5e7eb;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #f7f7f2 0%, #eef2f7 100%);
  color: var(--text);
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
}

h1 {
  margin-top: 0;
  font-size: 2rem;
  line-height: 1.2;
}

h2 {
  margin-top: 2rem;
  font-size: 1.2rem;
}

p,
li {
  line-height: 1.6;
  color: var(--muted);
}

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

.meta {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.nav a {
  text-decoration: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 12px;
  background: #fafafa;
}

@media (max-width: 640px) {
  .container {
    padding: 20px 14px 36px;
  }

  .card {
    padding: 18px;
  }

  h1 {
    font-size: 1.6rem;
  }
}