/* ============================================================
   Ethan Higgins — monochrome system
   ink #0A0A0B · paper #FCFCFA · mid #86868B
   hairline-light #E5E5E2 · hairline-dark #232327
   Display: Archivo 800/900 · Body: Newsreader · Meta: JetBrains Mono
   ============================================================ */

:root {
  --ink: #0a0a0b;
  --paper: #fcfcfa;
  --mid: #86868b;
  --faint: #b9b9bd;
  --line-light: #e5e5e2;
  --line-dark: #232327;
  --display: "Archivo", system-ui, sans-serif;
  --body: "Newsreader", Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, monospace;
  --gutter: clamp(1.25rem, 5vw, 4.5rem);
  --measure: 62ch;
}

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 1.125rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--ink); color: var(--paper); }
.dark ::selection, .dark::selection { background: var(--paper); color: var(--ink); }

a { color: inherit; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 3px; }

/* ---- utility type ---- */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mid);
}

.display {
  font-family: var(--display);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.015em;
  line-height: 0.92;
}

/* ============ header ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem var(--gutter);
  mix-blend-mode: difference;
  color: #fff; /* difference blend flips this against both grounds */
}
.site-header a { text-decoration: none; }
.wordmark {
  font-family: var(--display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.95rem;
}
.site-nav { display: flex; gap: 1.6rem; }
.site-nav a {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  position: relative;
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -4px;
  border-bottom: 1px solid currentColor;
  transition: right 0.25s ease;
}
.site-nav a:hover::after { right: 0; }

/* ============ hero ============ */
.hero {
  position: relative;
  min-height: 100svh;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.hero canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
.hero-inner {
  position: relative;
  z-index: 2;
  padding: 0 var(--gutter) clamp(3rem, 8vh, 6rem);
  pointer-events: none;
}
.hero-inner a, .hero-inner .hero-meta { pointer-events: auto; }
.hero .eyebrow { color: var(--faint); margin-bottom: 1.2rem; }
.hero-name {
  font-size: clamp(3.2rem, 12.5vw, 11rem);
  overflow: hidden;
}
.hero-name .line {
  display: block;
  transform: translateY(110%);
  animation: rise 0.9s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.hero-name .line:nth-child(2) { animation-delay: 0.12s; }
@keyframes rise { to { transform: translateY(0); } }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2.5rem;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}
.hero-meta a { text-decoration: none; border-bottom: 1px solid var(--line-dark); padding-bottom: 2px; }
.hero-meta a:hover { color: var(--paper); border-color: var(--paper); }

.scroll-hint {
  position: absolute;
  right: var(--gutter);
  bottom: clamp(3rem, 8vh, 6rem);
  z-index: 2;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mid);
  writing-mode: vertical-rl;
}

/* ============ sections ============ */
.section {
  padding: clamp(4rem, 12vh, 8rem) var(--gutter);
  border-top: 1px solid var(--line-light);
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: clamp(2rem, 6vh, 4rem);
}
.section-title {
  font-family: var(--display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
}

/* about */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: 3rem;
}
.about-copy { max-width: var(--measure); font-size: clamp(1.25rem, 2.2vw, 1.6rem); line-height: 1.5; }
.about-copy em { font-style: italic; }
.about-copy p + p { margin-top: 1.2em; }
.about-facts {
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 2.1;
  color: var(--mid);
  letter-spacing: 0.04em;
}
.about-facts strong { color: var(--ink); font-weight: 500; }

/* ============ project index rows ============ */
.project-list { list-style: none; border-top: 1px solid var(--line-light); }
.project-row { border-bottom: 1px solid var(--line-light); }
.project-row > a {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1.2fr) minmax(0, 2fr) auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.4rem 0.75rem;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, padding-left 0.18s ease;
}
.project-row .lang {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--mid);
}
.project-row .name {
  font-family: var(--display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 1.15rem;
}
.project-row .desc { color: var(--mid); font-size: 1rem; }
.project-row .arrow {
  font-family: var(--mono);
  font-size: 0.85rem;
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}
.project-row > a:hover, .project-row > a:focus-visible {
  background: var(--ink);
  color: var(--paper);
  padding-left: 1.4rem;
}
.project-row > a:hover .lang, .project-row > a:hover .desc,
.project-row > a:focus-visible .lang, .project-row > a:focus-visible .desc { color: var(--faint); }
.project-row > a:hover .arrow, .project-row > a:focus-visible .arrow { opacity: 1; transform: translateX(0); }

.aside-note {
  margin-top: 2.5rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--mid);
  letter-spacing: 0.04em;
}
.aside-note a { color: var(--ink); }

/* ============ writing list ============ */
.post-list { list-style: none; max-width: 52rem; }
.post-item { border-bottom: 1px solid var(--line-light); }
.post-item a {
  display: block;
  padding: 1.6rem 0;
  text-decoration: none;
}
.post-item .date {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
}
.post-item h3 {
  font-family: var(--display);
  font-weight: 800;
  text-transform: uppercase;
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  margin: 0.35rem 0 0.4rem;
  transition: opacity 0.15s ease;
}
.post-item a:hover h3 { opacity: 0.45; }
.post-item .desc { color: var(--mid); font-size: 1.02rem; }
.empty-state { color: var(--mid); font-style: italic; padding: 2rem 0; }

/* ============ article page ============ */
.article-wrap {
  padding: clamp(7rem, 16vh, 10rem) var(--gutter) clamp(4rem, 10vh, 7rem);
  max-width: calc(var(--measure) + 2 * var(--gutter));
  margin: 0 auto;
}
.article-head { margin-bottom: 3rem; }
.article-head .display { font-size: clamp(2.2rem, 6.5vw, 4.2rem); margin: 0.8rem 0 1rem; text-transform: none; letter-spacing: -0.02em; }
.article-head .desc { font-size: 1.25rem; color: var(--mid); font-style: italic; }

.prose { font-size: 1.15rem; }
.prose > * + * { margin-top: 1.1em; }
.prose h1, .prose h2, .prose h3 {
  font-family: var(--display);
  font-weight: 800;
  line-height: 1.15;
  margin-top: 2em;
}
.prose h1 { font-size: 1.7rem; }
.prose h2 { font-size: 1.4rem; }
.prose h3 { font-size: 1.15rem; }
.prose blockquote {
  border-left: 2px solid var(--ink);
  padding-left: 1.25rem;
  font-style: italic;
  color: var(--mid);
}
.prose code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: #f0f0ed;
  padding: 0.1em 0.35em;
  border-radius: 3px;
}
.prose pre {
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem 1.4rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.6;
}
.prose pre code { background: none; padding: 0; font-size: inherit; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li + li { margin-top: 0.35em; }
.prose hr { border: 0; border-top: 1px solid var(--line-light); margin: 2.5em 0; }
.prose a { text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose img { max-width: 100%; }

.backlink {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--mid);
}
.backlink:hover { color: var(--ink); }

/* ============ footer ============ */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(3.5rem, 9vh, 6rem) var(--gutter) 2.5rem;
}
.footer-cta {
  font-family: var(--display);
  font-weight: 900;
  text-transform: uppercase;
  font-size: clamp(2rem, 7vw, 5.5rem);
  line-height: 0.95;
  letter-spacing: -0.01em;
}
.footer-cta a { text-decoration: none; }
.footer-cta a:hover { opacity: 0.5; }
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mid);
}
.footer-links a { text-decoration: none; }
.footer-links a:hover { color: var(--paper); }
.footer-links .spacer { flex: 1; }

/* ============ scroll reveal ============ */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.16, 1, 0.3, 1); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
  .hero-name .line { transform: none; animation: none; }
}

/* ============ admin ============ */
.admin-body { background: var(--paper); min-height: 100vh; }
.admin-wrap { max-width: 60rem; margin: 0 auto; padding: 6.5rem var(--gutter) 4rem; }
.admin-title { font-family: var(--display); font-weight: 900; text-transform: uppercase; font-size: 2rem; margin-bottom: 2rem; }

.login-card { max-width: 22rem; margin-top: 4rem; }
label.field { display: block; margin-bottom: 1rem; }
label.field span {
  display: block;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid);
  margin-bottom: 0.4rem;
}
input[type="text"], input[type="password"], textarea {
  width: 100%;
  font-family: var(--mono);
  font-size: 0.9rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--ink);
  border-radius: 0;
  background: #fff;
  color: var(--ink);
}
textarea { min-height: 22rem; line-height: 1.6; resize: vertical; }
input:focus, textarea:focus { outline: 2px solid var(--ink); outline-offset: 1px; }

.btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover { background: var(--paper); color: var(--ink); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); }
.btn.danger:hover { background: #fff; color: #b00020; border-color: #b00020; }
.btn:disabled { opacity: 0.4; cursor: default; }

.admin-bar { display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.admin-bar .spacer { flex: 1; }

.admin-list { list-style: none; border-top: 1px solid var(--line-light); }
.admin-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.9rem 0.25rem;
  border-bottom: 1px solid var(--line-light);
  flex-wrap: wrap;
}
.admin-list .p-title { font-family: var(--display); font-weight: 700; flex: 1; min-width: 12rem; }
.admin-list .p-meta { font-family: var(--mono); font-size: 0.7rem; color: var(--mid); letter-spacing: 0.08em; }
.badge {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--ink);
}
.badge.draft { color: var(--mid); border-color: var(--faint); }

.editor-grid { display: grid; gap: 1rem; }
.editor-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.check {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.form-msg { font-family: var(--mono); font-size: 0.78rem; color: #b00020; min-height: 1.2em; }
.form-msg.ok { color: var(--mid); }

/* ============ responsive ============ */
@media (max-width: 760px) {
  .about-grid { grid-template-columns: 1fr; }
  .project-row > a { grid-template-columns: 1fr; gap: 0.3rem; padding: 1.2rem 0.5rem; }
  .project-row .arrow { display: none; }
  .editor-row { grid-template-columns: 1fr; }
  .scroll-hint { display: none; }
  .site-nav { gap: 1rem; }
}