/* To swap fonts site-wide, change --ff below */

/* ─── Variables ─────────────────────────────────────────────────────────── */

:root {
  --ff: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --ff-head: 'Josefin Sans', sans-serif;
  --fs:      1.0625rem;
  --lh:      1.75;
  --measure: 660px;

  /* Light palette */
  --bg:       #f8f8f6;
  --fg:       #1b1b19;
  --muted:    #6d6d65;
  --hairline: #dcdcd6;
  --link:       #43794d;
  --link-hover: #5f9468;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:         #111110;
    --fg:         #e0e0da;
    --muted:      #888880;
    --hairline:   #2a2a26;
    --link:       #6db87a;
    --link-hover: #8ccc98;
  }
}

:root[data-theme="dark"] {
  --bg:         #111110;
  --fg:         #e0e0da;
  --muted:      #888880;
  --hairline:   #2a2a26;
  --link:       #6db87a;
  --link-hover: #8ccc98;
}

:root[data-theme="light"] {
  --bg:       #f8f8f6;
  --fg:       #1b1b19;
  --muted:    #6d6d65;
  --hairline: #dcdcd6;
  --link:       #43794d;
  --link-hover: #5f9468;
}

/* ─── Reset ─────────────────────────────────────────────────────────────── */

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

/* ─── Base ──────────────────────────────────────────────────────────────── */

html { font-size: 19.2px; }

body {
  font-family: var(--ff);
  font-size: var(--fs);
  line-height: var(--lh);
  font-optical-sizing: auto;
  background-color: var(--bg);
  color: var(--fg);
  padding: 4rem 1.5rem 8rem;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--measure);
  margin: 0 auto;
}

/* ─── Typography ────────────────────────────────────────────────────────── */

h1 {
  font-family: var(--ff-head);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
  margin-bottom: 1rem;;
}

h2 {
  font-family: var(--ff-head);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .05em;
}

h3 {
  font-family: var(--ff-head);
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.3;
}

.h1-text {
  display: inline-block;
  --h1-c1: var(--fg);
  --h1-c2: var(--fg);
  --h1-c3: var(--fg);
}

@keyframes wave {
  0%   { transform: rotate(0deg); }
  25%  { transform: rotate(10deg); }
  50%  { transform: rotate(-6deg); }
  75%  { transform: rotate(8deg); }
  100% { transform: rotate(0deg); }
}

.wave {
  display: inline-block;
  transform-origin: 70% 80%;
}

.wave:hover {
  animation: wave 0.6s ease forwards;
}

h1.h1-ripple .h1-text {
  background: repeating-radial-gradient(
    circle at 40% 50%,
    var(--h1-c1) 0px,
    var(--h1-c2) 33px,
    var(--h1-c3) 66px,
    var(--h1-c1) 100px
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h4 {
  font-size: 1rem;
  font-weight: 700;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child { margin-bottom: 0; }

strong { font-weight: 700; }
em     { font-style: italic; }

/* ─── Links ─────────────────────────────────────────────────────────────── */

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  text-decoration-color: var(--hairline);
  transition: color 0.12s, text-decoration-color 0.12s;
}

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

/* ─── Blockquotes ───────────────────────────────────────────────────────── */

blockquote {
  border-left: 2px solid var(--hairline);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--muted);
  font-style: italic;
}

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

/* ─── Lists ─────────────────────────────────────────────────────────────── */

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

li { margin-bottom: 0.4rem; }
li:last-child { margin-bottom: 0; }

/* ─── Rules ─────────────────────────────────────────────────────────────── */

hr {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: 2.5rem 0;
}

/* ─── Images ────────────────────────────────────────────────────────────── */

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.5rem 0;
}

/* ─── Back nav ──────────────────────────────────────────────────────────── */

.back {
  margin-bottom: 2.5rem;
}

.back a {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.back a:hover {
  color: var(--fg);
}

/* ─── Site name ─────────────────────────────────────────────────────────── */

.site-name {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin-bottom: 3rem;
}

.site-name a {
  text-decoration: none;
  color: inherit;
}

/* ─── Homepage sections ─────────────────────────────────────────────────── */

.home-section {
  margin-bottom: 3rem;
}

.home-section h2 {
  margin-bottom: 1rem;
}

.home-section h3 {
  margin-top: 1.75rem;
  margin-bottom: 0.35rem;
}

.home-section p {
  margin-bottom: 1rem;
}

.home-section + .home-section {
  padding-top: 2.5rem;
  border-top: 1px solid var(--hairline);
}

/* Project block */
.project {
  margin-bottom: 1.75rem;
}

.project:last-child { margin-bottom: 0; }

.project-name {
  font-weight: 700;
  display: block;
  margin-bottom: 0.2rem;
  letter-spacing: .04em;
}

.project-links {
  list-style: none;
  padding: 0;
  margin: 0.4rem 0 0;
}

.project-links li { margin-bottom: 0.2rem; }

/* Simple link lists */
.link-list {
  list-style: none;
  padding: 0;
  margin: 0.5rem 0 0;
}

.link-list li { margin-bottom: 0.3rem; }

/* ─── Archive page ───────────────────────────────────────────────────────── */

.archive-intro {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--hairline);
}

.archive-intro h1 {
  margin-bottom: 0.4rem;
}

.archive-intro p {
  color: var(--muted);
  font-size: 0.9rem;
  font-style: italic;
  margin-bottom: 0;
}

.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.post-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1.5rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--hairline);
}

.post-list li:first-child {
  border-top: 1px solid var(--hairline);
}

.post-list a {
  text-decoration: none;
  flex: 1;
  min-width: 0;
}

.post-list a:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.post-list time {
  font-size: 0.825rem;
  color: var(--muted);
  white-space: nowrap;
  font-style: italic;
  font-variant-numeric: tabular-nums;
}

/* ─── Article (post pages) ──────────────────────────────────────────────── */

article header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--hairline);
}

article header h1 {
  margin-bottom: 0.4rem;
}

article header time {
  font-size: 0.875rem;
  color: var(--muted);
  font-style: italic;
}

/* Post body vertical rhythm */
.post-body h2 { margin-top: 2.5rem; margin-bottom: 0.75rem; }
.post-body h3 { margin-top: 2rem;   margin-bottom: 0.5rem; }
.post-body h4 { margin-top: 1.5rem; margin-bottom: 0.4rem; }

.post-body blockquote { margin-top: 1.5rem; margin-bottom: 1.5rem; }
.post-body img        { margin-top: 1.5rem; margin-bottom: 1.5rem; }
.post-body hr         { margin-top: 2rem;   margin-bottom: 2rem; }

.post-body ul,
.post-body ol {
  margin-top: 0.25rem;
  margin-bottom: 1.25rem;
}

/* ─── Theme toggle ──────────────────────────────────────────────────────── */

.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  background: none;
  border: 1px solid var(--hairline);
  color: var(--muted);
  font-family: var(--ff);
  font-size: 0.7rem;
  padding: 0.25rem 0.55rem;
  cursor: pointer;
  letter-spacing: 0.06em;
  border-radius: 5px;
  transition: color 0.12s, border-color 0.12s;
}

.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--muted);
}