:root {
  --bg: #f7f5ef;
  --bg-accent: #efe9da;
  --surface: #ffffff;
  --surface-soft: #fbfaf7;
  --text: #1f2a37;
  --text-muted: #607085;
  --border: #dde3ea;
  --accent: #0e766e;
  --accent-strong: #0b5f59;
  --focus: #14b8a6;
  --card-shadow: 0 14px 34px rgba(12, 24, 38, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 14% -8%, #fffdf7 0%, rgba(255, 253, 247, 0) 48%),
    radial-gradient(circle at 90% 0%, #e9f3f0 0%, rgba(233, 243, 240, 0) 42%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-accent) 100%);
  color: var(--text);
  line-height: 1.65;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

main {
  padding-top: 2.5rem;
  padding-bottom: 2.4rem;
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

h1,
h2 {
  margin: 0 0 0.72rem;
  line-height: 1.24;
}

h1 {
  font-size: clamp(1.46rem, 2.2vw, 2rem);
}

h2 {
  font-size: 1.16rem;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  background: var(--surface-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.75rem;
}

.footer {
  border-top: 1px solid var(--border);
  margin-top: 2rem;
  padding: 1.22rem 0;
  background: rgba(255, 255, 255, 0.65);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-inner a {
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .footer-inner {
    flex-wrap: wrap;
    gap: 0.4rem;
  }
}