:root {
  --bg: #f3f7fc;
  --card: #ffffff;
  --text: #16212e;
  --muted: #5b6b7d;
  --line: #dbe5f1;
  --accent: #1e79de;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, #edf4fc 0%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.6;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 8px 28px rgba(15, 35, 70, 0.06);
}

.header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

h1 {
  margin: 0 0 6px;
  font-size: 30px;
  line-height: 1.2;
}

h2 {
  margin: 22px 0 8px;
  font-size: 20px;
  line-height: 1.3;
}

p, li { font-size: 15px; }
ul { margin: 8px 0 0 20px; padding: 0; }

.meta {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.intro { margin-top: 10px; }

.lang-picker {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  min-width: 140px;
  color: var(--muted);
  font-size: 13px;
}

.lang-picker select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 14px;
  color: var(--text);
  background: #fff;
}

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

a:hover { text-decoration: underline; }

.note {
  margin-top: 22px;
  padding: 12px 14px;
  border: 1px dashed #b9c9dc;
  border-radius: 10px;
  color: var(--muted);
  background: #f8fbff;
  font-size: 13px;
}

@media (max-width: 680px) {
  .header {
    flex-direction: column;
  }
  .lang-picker {
    width: 100%;
  }
}