/* ---- Reset & Base ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --text: #2b3029;
  --text-secondary: #6b7568;
  --bg: #e8ece4;
  --link: #2b3029;
  --link-hover: #4a7c6f;
  --border: #d4dbd0;
  --accent: #4a7c6f;
  --name: #3d6b5e;
  --max-width: 640px;
}


html {
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: 'Charter', 'Bitstream Charter', 'Georgia', serif;
  color: var(--text);
  background: var(--bg);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  line-height: 1.6;
  border-top: 3px solid var(--accent);
}

/* ---- Layout ---- */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ---- Header ---- */
header {
  margin-bottom: 3rem;
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
  font-style: normal;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

header h1 a {
  color: var(--name);
  text-decoration: none;
  transition: color 0.15s;
}

header h1 a:hover {
  color: var(--accent);
}

nav {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.15s;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width 0.25s ease;
}

nav a:hover {
  color: var(--accent);
}

nav a:hover::after {
  width: 100%;
}

/* ---- Sections ---- */
section {
  margin-bottom: 3rem;
}

.intro p {
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--text-secondary);
  max-width: 540px;
}

.intro a {
  color: var(--text);
  text-decoration-color: var(--border);
  text-underline-offset: 2px;
}

.intro a:hover {
  text-decoration-color: var(--text);
}

h2 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

/* ---- Post List ---- */
.post-list {
  list-style: none;
}

.post-list li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.4rem 0;
}

.post-list .date {
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-family: 'SF Mono', 'Menlo', monospace;
  flex-shrink: 0;
  min-width: 5rem;
}

.post-list a {
  color: var(--link);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s, transform 0.2s;
  display: inline-block;
}

.post-list a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.more {
  margin-top: 0.75rem;
}

.more a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.more a:hover {
  color: var(--accent);
}

/* ---- Topic Grid ---- */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
}

.topic {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem;
  text-decoration: none;
  background: var(--bg);
  transition: background 0.15s;
}

.topic:hover {
  background: color-mix(in srgb, var(--text) 4%, var(--bg));
}

.topic strong {
  color: var(--text);
  font-size: 0.9rem;
}

.topic span {
  color: var(--text-secondary);
  font-size: 0.8rem;
  line-height: 1.4;
}

/* ---- Footer ---- */
footer {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

footer p {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

footer a:hover {
  color: var(--accent);
}

/* ---- Article/Page ---- */
.page-title {
  font-size: 1.3rem;
  font-weight: 600;
  text-transform: none;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 1.5rem;
}

article.page p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

article.page h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.5rem;
}

article.page a {
  color: var(--text);
  text-decoration-color: var(--border);
  text-underline-offset: 2px;
}

article.page a:hover {
  text-decoration-color: var(--text);
}

nav a.active {
  color: var(--text);
}

/* ---- Book, Link, Question Lists ---- */
.book-list, .link-list, .question-list {
  list-style: none;
  margin-bottom: 1rem;
}

.book-list li, .link-list li {
  padding: 0.35rem 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.question-list li {
  padding: 0.5rem 0;
  font-size: 0.95rem;
  line-height: 1.6;
  border-bottom: 1px solid var(--border);
}

.question-list li:last-child {
  border-bottom: none;
}

/* ---- Responsive ---- */
@media (max-width: 480px) {
  html {
    font-size: 16px;
  }

  main {
    padding: 2rem 1.25rem 3rem;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }

  .post-list li {
    flex-direction: column;
    gap: 0.15rem;
  }
}