:root {
  --bg: #f4f1ea;
  --panel: #fffdf8;
  --ink: #1f1f1c;
  --muted: #5f625b;
  --line: #d9d2c4;
  --accent: #0f6c5c;
  --accent-soft: #dcefe9;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  background: linear-gradient(180deg, #efe9dc 0%, var(--bg) 22%, #f7f4ee 100%);
  color: var(--ink);
}

main {
  width: min(1100px, calc(100vw - 2rem));
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

header {
  padding: 1.5rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

h1,
h2 {
  margin: 0;
  font-weight: 600;
  line-height: 1.1;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  letter-spacing: -0.03em;
}

h2 {
  font-size: 1.5rem;
}

p {
  line-height: 1.55;
  color: var(--muted);
  max-width: 70ch;
}

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

a:hover {
  text-decoration: underline;
}

.summary,
.module {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(65, 52, 24, 0.05);
}

.summary {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem 1.2rem;
}

.summary ul {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

.summary li a {
  display: block;
  padding: 0.8rem 0.95rem;
  border-radius: 12px;
  background: var(--accent-soft);
  font-weight: 600;
}

.modules {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.module {
  padding: 1rem 1.1rem 1.2rem;
}

.module header {
  padding: 0 0 0.85rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 1rem;
}

.count {
  display: inline-block;
  margin-top: 0.35rem;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  background: #f0ebe1;
  color: var(--muted);
  font-size: 0.92rem;
}

.conversation-list {
  columns: 3 13rem;
  column-gap: 1.5rem;
  margin: 0;
  padding-left: 1.1rem;
}

.conversation-list li {
  break-inside: avoid;
  margin: 0 0 0.4rem;
  padding-left: 0.2rem;
  color: var(--muted);
}

footer {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  main {
    width: min(100vw - 1rem, 100%);
  }

  .conversation-list {
    columns: 1;
  }
}