:root {
  --bg: #f2f5ff;
  --surface: #ffffff;
  --text: #10203a;
  --muted: #4c5f81;
  --line: rgba(18, 37, 127, 0.16);
  --primary: #1d3bd2;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", "Trebuchet MS", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

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

.wrapper {
  width: min(940px, calc(100% - 1.6rem));
  margin: 2rem auto;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1rem, 2.4vw, 2rem);
}

header {
  margin-bottom: 1.3rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  line-height: 1.16;
  font-size: clamp(1.5rem, 1.2vw + 1.2rem, 2.15rem);
}

.meta {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.94rem;
}

h2 {
  margin: 1.5rem 0 0.55rem;
  font-size: 1.1rem;
}

p {
  margin: 0.55rem 0;
}

ul {
  margin: 0.5rem 0;
  padding-left: 1.2rem;
}

li {
  margin: 0.4rem 0;
}

.notice {
  margin: 1.2rem 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #edf2ff;
  padding: 0.9rem;
}

footer {
  margin-top: 1.4rem;
  border-top: 1px solid var(--line);
  padding-top: 0.9rem;
  color: var(--muted);
}

.back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  text-decoration: none;
  font-weight: 700;
}

@media (max-width: 680px) {
  .wrapper {
    margin: 1rem auto;
  }
}