*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  background: #fff;
  color: #000;
}

html[data-theme="dark"] body {
  background: #000;
  color: #fff;
}

.container {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 5rem;
}

/* ── Nav ── */
nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

nav .links {
  display: flex;
  gap: 0.25rem;
}

nav a,
.theme-btn {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  color: inherit;
  text-decoration: none;
  border: none;
  background: none;
  font: inherit;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}

nav a:hover,
.theme-btn:hover {
  background: #000;
  color: #fff;
}

html[data-theme="dark"] nav a:hover,
html[data-theme="dark"] .theme-btn:hover {
  background: #fff;
  color: #000;
}

/* ── Bio ── */
.bio {
  margin-bottom: 2.75rem;
}

.bio h1 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.bio h1::before {
  content: 'phast@blog:~$ ';
}

html[data-theme="dark"] .bio h1 {
  color: #00ff41;
}

.bio p {
  color: #000;
  opacity: 0.65;
  margin-bottom: 0.4rem;
}

html[data-theme="dark"] .bio p {
  color: #00ff41;
}

.bio a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.bio a:hover {
  opacity: 0.5;
}

.bio p:last-child::after {
  content: '';
  display: inline-block;
  width: 0.55em;
  height: 1em;
  background: #000;
  vertical-align: text-bottom;
  margin-left: -0.55em;
  animation: blink 1s step-end infinite;
}

html[data-theme="dark"] .bio p:last-child::after {
  background: #00ff41;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0; }
}

/* ── Section ── */
section {
  margin-bottom: 2.5rem;
}

section h2 {
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

/* ── Post list ── */
.posts {
  list-style: none;
}

.posts li a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.35rem 0.5rem;
  margin: 0 -0.5rem;
  color: inherit;
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}

.posts li a:hover {
  background: #000;
  color: #fff;
}

html[data-theme="dark"] .posts li a:hover {
  background: #fff;
  color: #000;
}

.post-date {
  flex-shrink: 0;
  opacity: 0.45;
  font-size: 0.8rem;
}

.posts li a:hover .post-date {
  opacity: 0.65;
}

@media (max-width: 520px) {
  .posts li a {
    flex-direction: column;
    gap: 0.1rem;
  }
}

/* ── Footer ── */
body::after {
  content: '';
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6rem;
  background: linear-gradient(to bottom, transparent, #fff);
  pointer-events: none;
  z-index: 1;
}

html[data-theme="dark"] body::after {
  background: linear-gradient(to bottom, transparent, #000);
}

footer {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 42rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(0, 0, 0, 0.15);
  background: #fff;
  opacity: 0.45;
  font-size: 0.8rem;
  z-index: 2;
}

html[data-theme="dark"] footer {
  border-top-color: rgba(255, 255, 255, 0.25);
  background: #000;
}

/* ── Post page ── */
.post-header {
  margin-bottom: 2.5rem;
}

.post-header h1 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.post-meta {
  opacity: 0.45;
  font-size: 0.8rem;
}

.post-body p {
  opacity: 0.75;
  margin-bottom: 1.25rem;
}

.post-body h2 {
  font-size: 0.875rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
}

.post-body a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.post-body a:hover {
  opacity: 0.5;
}

.post-body ul,
.post-body ol {
  opacity: 0.75;
  margin: 0 0 1.25rem 1.25rem;
}

.post-body li {
  margin-bottom: 0.4rem;
}

.post-body code {
  padding: 0.05rem 0.3rem;
  background: rgba(0, 0, 0, 0.06);
}

html[data-theme="dark"] .post-body code {
  background: rgba(255, 255, 255, 0.12);
}

.post-body pre {
  margin-bottom: 1.25rem;
  padding: 0.75rem 1rem;
  overflow-x: auto;
  background: rgba(0, 0, 0, 0.06);
}

html[data-theme="dark"] .post-body pre {
  background: rgba(255, 255, 255, 0.12);
}

.post-body pre code {
  padding: 0;
  background: none;
}

html[data-theme="dark"] .post-body pre code {
  background: none;
}

.post-body blockquote {
  margin-bottom: 1.25rem;
  padding-left: 1rem;
  border-left: 2px solid rgba(0, 0, 0, 0.25);
}

html[data-theme="dark"] .post-body blockquote {
  border-left-color: rgba(255, 255, 255, 0.25);
}

.post-body blockquote p:last-child {
  margin-bottom: 0;
}