:root {
  --bg: #f7f3f0;
  --fg: #171717;
  --fg-strong: #0a0a0a;
  --fg-secondary: #262626;
  --muted: #737373;
  --faint: #a3a3a3;
  --line: rgba(0, 0, 0, 0.07);
  --logo-color: #262626;
  --logo-active: #0a0a0a;
}

html.dark {
  --bg: #1a1a1a;
  --fg: #e5e5e5;
  --fg-strong: #ffffff;
  --fg-secondary: #f5f5f5;
  --muted: #a3a3a3;
  --faint: #737373;
  --line: rgba(255, 255, 255, 0.08);
  --logo-color: #e5e5e5;
  --logo-active: #ffffff;
}

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

html { line-height: 1.5; -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }

body {
  font-family: "Labil Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--fg);
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--fg); color: var(--bg); }

/* ---------- Header ---------- */

.site-header {
  position: absolute;
  inset-inline: 0;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 1.25rem;
}
@media (min-width: 768px) {
  .site-header { padding: 2rem; }
}

.brand { display: flex; flex-direction: column; gap: 0.375rem; font-family: "Labil Grotesk", system-ui, sans-serif; font-size: 10px; line-height: 1; letter-spacing: 0.18em; text-transform: uppercase; }
@media (min-width: 768px) {
  .brand { font-size: 11px; }
}

.brand-line { display: flex; align-items: center; gap: 0.5rem; }
.brand-dot { display: inline-block; width: 6px; height: 6px; flex-shrink: 0; }
.brand-dot.solid { background: var(--fg-strong); }
.brand-dot.hollow { border: 1px solid var(--faint); }
.brand-line.first { color: var(--fg-strong); }
.brand-line.second { color: var(--muted); padding-left: 14px; }

.header-actions { display: flex; align-items: center; gap: 1rem; font-family: "Labil Grotesk", system-ui, sans-serif; }
@media (min-width: 768px) {
  .header-actions { gap: 1.25rem; }
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.125rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem;
}
.lang-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-family: inherit;
  font-size: 10px;
  line-height: 1;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}
@media (min-width: 768px) {
  .lang-btn { font-size: 11px; }
}
.lang-btn:hover { color: var(--fg-strong); }
.lang-btn.is-active { background: var(--fg); color: var(--bg); }

.header-btn {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: color 0.15s ease;
}
@media (min-width: 768px) {
  .header-btn { font-size: 11px; }
}
.header-btn:hover { color: var(--fg-strong); }
.header-btn .icon { font-size: 14px; line-height: 1; }
.header-btn .label { display: none; }
@media (min-width: 640px) {
  .header-btn .label { display: inline; }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4.5rem 1.25rem;
}
@media (min-width: 768px) {
  .hero { padding: 5.5rem 1.25rem; }
}
@media (max-width: 640px) {
  .hero { padding: 3.5rem 1rem 2.5rem; }
}

.hero-inner { width: 100%; max-width: 64rem; }

.ascii-logo {
  margin: 0 auto;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-feature-settings: "ss01", "ss02", "cv11";
  white-space: pre;
  line-height: 1;
  letter-spacing: 0;
  text-align: center;
  color: var(--logo-color);
  user-select: none;
  cursor: crosshair;
}
#logo-wrap.ascii-logo { width: 100%; }
#logo-wrap .ascii-logo { margin: 0; }
.ascii-logo[hidden] { display: none; }
.ascii-char { display: inline; transition: color 0.14s ease-out; will-change: color; }
.ascii-char.is-active { color: var(--logo-active); }

.ascii-boot { animation: asciiFadeIn 0.5s ease-out both; }
@media (prefers-reduced-motion: reduce) {
  .ascii-boot { animation: none; }
}
@keyframes asciiFadeIn {
  0% { opacity: 0; }
  to { opacity: 1; }
}

.tagline {
  margin: 1.25rem auto 0;
  max-width: 42ch;
  text-align: center;
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--fg-secondary);
}
@media (min-width: 640px) {
  .tagline { font-size: 17px; }
}
@media (min-width: 768px) {
  .tagline { margin-top: 2rem; font-size: 18px; }
}
@media (max-width: 640px) {
  .tagline { margin-top: 0.75rem; font-size: 14px; }
}

.link-row {
  margin: 2.5rem auto 0;
  max-width: 52rem;
  display: grid;
  grid-template-columns: repeat(4, auto);
  justify-content: center;
  align-items: center;
  gap: 0.75rem 2rem;
}
@media (min-width: 640px) {
  .link-row { gap: 1rem 2.5rem; }
}
@media (max-width: 640px) {
  .link-row { margin-top: 1.5rem; gap: 0.5rem 0.75rem; }
  .link-item { font-size: 10px; }
  .link-tag { display: none; }
}

.link-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Labil Grotesk", system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-secondary);
  transition: color 0.15s ease;
  white-space: nowrap;
}
@media (min-width: 768px) {
  .link-item { font-size: 12px; gap: 0.625rem; }
}
.link-item:hover { color: var(--fg-strong); }

.link-marker {
  display: inline-flex;
  width: 10px;
  height: 10px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 9px;
  color: var(--faint);
  transition: color 0.15s ease;
}
.link-item:hover .link-marker { color: var(--fg-strong); }
.link-name { font-weight: 500; }
.link-tag {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0;
  text-transform: none;
  transition: color 0.15s ease;
}
.link-item:hover .link-tag { color: var(--fg-secondary); }

/* ---------- Sections ---------- */

.section { max-width: 64rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
@media (min-width: 768px) {
  .section { padding: 1.5rem 2rem 3rem; }
}

.section-title {
  font-family: "Labil Grotesk", system-ui, sans-serif;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.about { text-align: justify; }
.about p { max-width: 64rem; margin: 0 auto 1rem; font-size: 0.95rem; color: var(--fg-secondary); line-height: 1.7; }
.about a { color: var(--fg-strong); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: var(--faint); }
.about a:hover { text-decoration-color: var(--fg-strong); }

.paper-list { list-style: none; margin-bottom: 2rem; }
.paper-row {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
}
.paper-info { flex: 1; font-size: 0.95rem; line-height: 1.5; }
.paper-info strong { font-weight: 600; font-size: 1rem; color: var(--fg-secondary); }
.paper-info em { display: block; margin-top: 0.2rem; font-style: normal; font-size: 0.78rem; color: var(--muted); }
.paper-date { flex-shrink: 0; color: var(--faint); font-size: 0.85rem; white-space: nowrap; }
.coauthors { display: block; font-size: 0.76rem; color: var(--muted); margin-top: 0.15rem; }
.paper-links { margin-left: 0.2rem; }
.paper-links a { font-size: 0.82rem; color: var(--muted); text-decoration: underline; text-underline-offset: 2px; margin-right: 0.15rem; }
.paper-links a:hover { color: var(--fg-strong); }

/* ---------- Footer ---------- */

.site-footer {
  padding: 2rem 1.25rem 3rem;
  display: flex;
  justify-content: center;
  font-family: "Labil Grotesk", system-ui, sans-serif;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ---------- Subpages (contact, writings) ---------- */

.page { min-height: 100vh; min-height: 100dvh; display: flex; align-items: center; justify-content: center; padding: 4rem 1.5rem; }
.page-shell { width: 100%; max-width: 640px; }
.page-shell h1 { font-size: 1.5rem; font-weight: 600; letter-spacing: -0.02em; margin-bottom: 1rem; color: var(--fg-strong); }
.page-intro { color: var(--muted); margin-bottom: 2rem; font-size: 0.95rem; max-width: 46ch; }

.writing-list { list-style: none; }
.writing-list li { display: flex; justify-content: space-between; gap: 1.5rem; padding: 0.7rem 0; border-bottom: 1px solid var(--line); font-size: 0.92rem; }
.writing-title { color: var(--fg-secondary); }
.writing-date { color: var(--faint); font-size: 0.82rem; white-space: nowrap; }

.contact-list p { margin-bottom: 0.9rem; font-size: 0.95rem; color: var(--fg-secondary); }
.contact-list strong { color: var(--fg-strong); font-weight: 600; }
.contact-list a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--faint); }
.contact-list a:hover { text-decoration-color: var(--fg-strong); }

.page-links { margin-top: 2.5rem; display: flex; gap: 1.25rem; }
.page-links a { font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); }
.page-links a:hover { color: var(--fg-strong); }

@media (max-width: 768px) {
  .page { padding: 3rem 1.5rem; }
}