@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&family=Source+Serif+4:wght@400;600;700&display=swap');

:root {
  --bg: #f2efe6;
  --paper: #fffdf7;
  --ink: #1f1d18;
  --muted: #5f5a4e;
  --accent: #0a6a5b;
  --accent-soft: #d3ece6;
  --line: #dfd8ca;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(31, 29, 24, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at 15% 0%, #fff8de 0%, #f2efe6 40%),
    linear-gradient(145deg, #f4f1e8 0%, #ebe5d7 100%);
  color: var(--ink);
  min-height: 100%;
}

body {
  font-family: "DM Sans", "Segoe UI", sans-serif;
  line-height: 1.65;
}

main {
  max-width: 860px;
  margin: 42px auto;
  padding: 0 18px 36px;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  animation: enter 260ms ease-out;
}

h1,
h2,
h3 {
  font-family: "Source Serif 4", Georgia, serif;
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: clamp(1.9rem, 2.6vw, 2.5rem);
  margin-bottom: 8px;
}

h2 {
  font-size: 1.3rem;
  margin-top: 28px;
  margin-bottom: 8px;
}

h3 {
  font-size: 1.08rem;
  margin-top: 18px;
  margin-bottom: 8px;
}

p,
li {
  color: var(--ink);
  margin-top: 0;
}

ul,
ol {
  padding-left: 22px;
}

.subtle {
  color: var(--muted);
  margin-bottom: 16px;
}

.note {
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  padding: 10px 12px;
  border-radius: 8px;
}

a {
  color: var(--accent);
  text-underline-offset: 2px;
}

a:hover {
  text-decoration-thickness: 2px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 4px;
}

nav a {
  display: inline-block;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 12px;
  text-decoration: none;
  background: #fff;
  transition: transform 120ms ease, background-color 120ms ease;
}

nav a:hover {
  transform: translateY(-1px);
  background: #fcfaf2;
}

.footer {
  margin-top: 22px;
  color: var(--muted);
  font-size: 0.94rem;
}

@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  main {
    margin-top: 20px;
    padding: 0 12px 24px;
  }

  .card {
    padding: 18px;
  }
}