:root {
  color-scheme: light;
  --primary: #0d5c4d;
  --primary-dark: #08483c;
  --background: #f5f7f6;
  --surface: #ffffff;
  --text: #17211f;
  --muted: #5f6b68;
  --border: #e3e9e7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}

.header {
  position: relative;
  padding: 48px 20px 42px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  text-align: center;
}

.header h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 5vw, 2.5rem);
}

.header p {
  margin: 0;
  opacity: 0.88;
}

.lang-switcher {
  position: absolute;
  top: 18px;
  right: 20px;
}

.lang-switcher a {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid rgb(255 255 255 / 45%);
  border-radius: 999px;
  color: #fff;
  text-decoration: none;
}

.container {
  width: min(860px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 12px;
}

.back-link {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--primary);
  font-weight: 600;
  text-decoration: none;
}

.action-link {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.action-link:hover {
  background: var(--primary-dark);
}

.card {
  padding: clamp(24px, 5vw, 46px);
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 12px 36px rgb(15 57 49 / 7%);
}

.update-date {
  display: inline-block;
  margin-bottom: 18px;
  padding: 8px 12px;
  border-radius: 8px;
  background: #e8f5e9;
  color: #2e7d32;
  font-size: 0.875rem;
}

h2 {
  margin: 30px 0 10px;
  color: var(--primary);
  font-size: 1.25rem;
}

p {
  margin: 0 0 14px;
}

footer {
  padding: 30px 20px 40px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 520px) {
  .header {
    padding-top: 64px;
  }

  .container {
    width: min(100% - 20px, 860px);
    padding-top: 18px;
  }

  .card {
    border-radius: 14px;
  }
}