:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #172033;
  --muted: #5f6b80;
  --border: #dbe2ef;
  --primary: #3b82f6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #eef3ff 0%, var(--bg) 240px);
}

.container {
  max-width: 900px;
  margin: 32px auto;
  padding: 32px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.06);
}

.hero {
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 24px;
}

.app-name {
  margin: 0;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: 0.2px;
}

h1 {
  margin: 6px 0 8px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.1;
}

.updated {
  margin: 0;
  color: var(--muted);
}

section + section {
  margin-top: 18px;
}

h2 {
  margin: 0 0 8px;
  font-size: 1.15rem;
}

p,
li {
  color: #2d3950;
  line-height: 1.65;
}

ul {
  margin: 0;
  padding-left: 20px;
}

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

a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .container {
    margin: 12px;
    padding: 22px 18px;
    border-radius: 12px;
  }
}