/* ===== Base Reset ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.7;
  background-color: var(--bg);
  color: var(--fg);
  padding: 0 1.5rem;
  max-width: 650px;
  margin: 0 auto;
}

a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-underline-offset: 3px;
}

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

pre {
  padding: 1rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-weight: 500;
  margin: 2rem 0 1rem;
  line-height: 1.4;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.4rem; }
h3 { font-size: 1.2rem; }

p {
  margin: 1rem 0;
}

img {
  max-width: 100%;
  height: auto;
}

/* ===== Navigation ===== */
nav.navbar {
  padding: 2rem 0;
  display: flex;
  gap: 1.5rem;
  font-size: 1.3rem;
}

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

nav a:hover {
  text-decoration: underline;
}

.toggle-button {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  padding: 0;
}

/* ===== Search ===== */
#search {
  width: 100%;
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--fg);
  padding: 0.75rem 1rem;
  margin: 1rem 0;
  font-size: 1rem;
}

#results li {
  list-style: none;
  margin-bottom: 1rem;
}

/* ===== Featured Post ===== */
.featured {
  margin-bottom: 3rem;
}

.featured h2 {
  margin-top: 0;
}

.featured .date {
  opacity: 0.6;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

/* ===== Archive Tree ===== */
.tree, .tree ul {
  list-style: none;
  margin: 0;
  padding-left: 1rem;
}

.tree > li {
  margin: 0.5rem 0;
}

.tree li {
  position: relative;
}

.tree .folder {
  font-weight: 500;
}

.tree a {
  text-decoration: none;
}

.tree a:hover {
  text-decoration: underline;
}

/* ===== Footer ===== */
footer {
  margin-top: 4rem;
  padding: 2rem 0;
  opacity: 0.5;
  font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (min-width: 768px) {
  body {
    padding: 0 2rem;
  }
}