/* =========================================================
   Alexandr Prozorov — personal site
   Minimalist + smooth, dark default with light toggle.
   ========================================================= */

:root {
  --bg: #0b0d10;
  --bg-soft: #0f1216;
  --bg-elev: #14181d;
  --fg: #e9edf2;
  --fg-mut: #9aa3ad;
  --fg-dim: #6b7480;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.18);
  --accent: #56c0ff;
  --accent-2: #b78bff;
  --accent-soft: rgba(86, 192, 255, 0.12);
  --grid: rgba(255, 255, 255, 0.04);

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --font-serif: "Fraunces", "Times New Roman", serif;

  --max: 1200px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.25s;
  --t-base: 0.6s;
  --t-slow: 1.1s;
}

:root[data-theme="light"] {
  --bg: #f7f6f2;
  --bg-soft: #efede6;
  --bg-elev: #ffffff;
  --fg: #14181d;
  --fg-mut: #4d5560;
  --fg-dim: #7a828d;
  --line: rgba(0, 0, 0, 0.09);
  --line-strong: rgba(0, 0, 0, 0.22);
  --accent: #1d6fd1;
  --accent-2: #6c3ed8;
  --accent-soft: rgba(29, 111, 209, 0.1);
  --grid: rgba(0, 0, 0, 0.04);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
::selection { background: var(--accent); color: var(--bg); }

/* ---- background canvas ---- */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.45;
}

/* ---- custom cursor (desktop only) ---- */
.cursor, .cursor-dot {
  position: fixed;
  top: 0; left: 0;
  pointer-events: none;
  z-index: 999;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
}
.cursor {
  width: 34px; height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  transition:
    width 0.25s var(--ease),
    height 0.25s var(--ease),
    background 0.25s var(--ease),
    border-color 0.25s var(--ease);
}
.cursor-dot {
  width: 5px; height: 5px;
  background: #fff;
}
.cursor.is-link { width: 54px; height: 54px; background: rgba(255, 255, 255, 0.06); }
.cursor.is-card { width: 80px; height: 80px; background: rgba(255, 255, 255, 0.05); }
@media (hover: none), (max-width: 768px) {
  .cursor, .cursor-dot { display: none; }
  body { cursor: auto; }
}
@media (hover: hover) and (min-width: 769px) {
  body { cursor: none; }
  a, button { cursor: none; }
}

/* ---- nav ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem var(--pad);
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast) var(--ease), padding var(--t-fast) var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--line); padding-top: 0.75rem; padding-bottom: 0.75rem; }

.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  font-weight: 500;
}
.logo-mark {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft), 0 0 18px var(--accent);
  animation: pulse 3.6s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px var(--accent-soft), 0 0 14px var(--accent); }
  50%      { box-shadow: 0 0 0 7px transparent,        0 0 22px var(--accent); }
}

.nav-links {
  display: flex;
  gap: 1.6rem;
  font-size: 0.92rem;
  color: var(--fg-mut);
}
.nav-links a {
  position: relative;
  padding: 0.25rem 0;
  transition: color var(--t-fast) var(--ease);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.nav-links a:hover { color: var(--fg); }
.nav-links a:hover::after { transform: scaleX(1); }
.nav-links a.nav-external { color: var(--accent); display: inline-flex; align-items: center; gap: 0.2rem; }
.nav-links a.nav-external:hover { color: var(--accent-2); }
.nav-ext-icon { font-size: 0.7em; transition: transform var(--t-fast) var(--ease); }
.nav-links a.nav-external:hover .nav-ext-icon { transform: translate(2px, -2px); }

.theme-toggle {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--fg);
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.theme-toggle:hover { border-color: var(--line-strong); transform: rotate(-15deg); }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: block; }

@media (max-width: 720px) {
  .nav-links { display: none; }
}

/* ---- layout ---- */
main { width: 100%; }
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(5rem, 12vh, 9rem) var(--pad);
  position: relative;
}
.section.alt { background: linear-gradient(to bottom, transparent, var(--bg-soft) 18%, var(--bg-soft) 82%, transparent); max-width: none; }
.section.alt > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.section.alt > .section-head { margin-bottom: 2.4rem; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.4rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1rem;
}
.section-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}
.section-title {
  font-family: var(--font-serif);
  font-weight: 500;
  font-style: italic;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  margin: 0;
  letter-spacing: -0.01em;
}

/* ---- hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 8rem var(--pad) 4rem;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 60% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 60% 40%, #000 30%, transparent 75%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  max-width: var(--max);
  width: 100%;
  margin: 0 auto;
}
.hero-split {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}
@media (max-width: 900px) {
  .hero-split { grid-template-columns: 1fr; }
}

/* ---- portrait ---- */
.portrait {
  position: relative;
  margin: 0;
  justify-self: center;
  width: clamp(220px, 30vw, 360px);
  text-align: center;
}
.portrait-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  isolation: isolate;
  background: var(--bg-elev);
}
.portrait-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
  filter: contrast(1.05) saturate(0.95);
  transition: transform 0.9s var(--ease), filter 0.6s var(--ease);
  z-index: 1;
}
.portrait:hover .portrait-frame img {
  transform: scale(1.04);
  filter: contrast(1.1) saturate(1.05);
}
.portrait-ring {
  position: absolute;
  inset: -10px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  pointer-events: none;
  z-index: 2;
  animation: ringSpin 28s linear infinite;
}
.portrait-ring::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  transform: translateX(-50%);
}
.portrait-ring--2 {
  inset: -22px;
  border-style: dashed;
  border-color: var(--line);
  animation: ringSpin 50s linear infinite reverse;
}
.portrait-ring--2::before {
  background: var(--accent-2);
  box-shadow: 0 0 12px var(--accent-2);
  top: auto;
  bottom: -3px;
}
@keyframes ringSpin { to { transform: rotate(360deg); } }

.portrait-glitch {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    repeating-linear-gradient(
      to bottom,
      transparent 0 3px,
      rgba(255, 255, 255, 0.025) 3px 4px
    );
  mix-blend-mode: overlay;
  opacity: 0.6;
}
.portrait figcaption {
  margin-top: 1.1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.portrait figcaption .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
}
.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-mut);
  letter-spacing: 0.04em;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  margin-bottom: 2rem;
}
.meta-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2.6s var(--ease) infinite;
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(3rem, 10vw, 8rem);
  line-height: 0.94;
  letter-spacing: -0.035em;
  margin: 0 0 1.5rem;
}
.hero-title .line { display: block; overflow: hidden; }
.hero-title .word {
  display: inline-block;
  transform: translateY(110%);
  animation: rise 1.1s var(--ease) forwards;
}
.hero-title .line:nth-child(2) .word { animation-delay: 0.12s; }
.hero-title .phd {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 0.36em;
  letter-spacing: 0.005em;
  color: var(--accent);
  vertical-align: baseline;
  margin-left: 0.1em;
  white-space: nowrap;
  position: relative;
  top: -0.06em;
}
.cursor-blink {
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 300;
  animation: blink 1.1s steps(2) infinite;
  margin-left: 0.2em;
  transform: translateY(-0.18em);
}
@keyframes rise { to { transform: translateY(0); } }
@keyframes blink { 50% { opacity: 0; } }

.hero-sub {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  color: var(--fg);
  max-width: 60ch;
  margin: 0 0 1.6rem;
}
.hero-sub .muted { color: var(--fg-mut); }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.4rem;
}
.tag {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--fg-mut);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.tag:hover { color: var(--fg); border-color: var(--accent); background: var(--accent-soft); }
a.tag { text-decoration: none; }
a.tag:hover { color: var(--accent); }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid var(--line);
  transition: transform var(--t-fast) var(--ease), background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn.primary { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn.primary:hover { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.btn.ghost { color: var(--fg); }
.btn.ghost:hover { border-color: var(--fg); }

.hero-scroll {
  position: absolute;
  bottom: 1.6rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}
.line-v {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: drop 2.2s var(--ease) infinite;
}
@keyframes drop {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  50.1%{ transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---- about ---- */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 3rem;
  align-items: start;
}
@media (max-width: 800px) { .about-grid { grid-template-columns: 1fr; } }

.about-lead {
  grid-column: 1 / -1;
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  line-height: 1.35;
  font-weight: 400;
  color: var(--fg);
  margin: 0 0 1.5rem;
}
.about-lead em { color: var(--accent); font-style: italic; }
.about-body { font-size: 1.02rem; color: var(--fg-mut); margin: 0 0 1rem; max-width: 65ch; }
.about-body em { color: var(--fg); font-style: normal; font-weight: 500; }
.about-body a { color: var(--accent); border-bottom: 1px solid transparent; transition: border-color var(--t-fast) var(--ease); }
.about-body a:hover { border-color: var(--accent); }

.about-side {
  border-left: 1px solid var(--line);
  padding-left: 1.6rem;
}
.kv { margin: 0; font-size: 0.88rem; }
.kv dt {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--fg-dim);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 1rem;
}
.kv dt:first-child { margin-top: 0; }
.kv dd { margin: 0.2rem 0 0; color: var(--fg); }
.kv a { color: var(--accent); }
.kv a:hover { text-decoration: underline; }

/* ---- research cards ---- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.2rem;
}
.card {
  position: relative;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 1.6rem 1.5rem;
  transition: transform 0.5s var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--accent), transparent 40%, var(--accent-2));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.card:hover { transform: translateY(-4px); border-color: transparent; }
.card:hover::before { opacity: 1; }
.card header { margin-bottom: 0.7rem; }
.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  transition: color var(--t-fast) var(--ease);
}
a.card-tag:hover { color: var(--accent-2); }
.card h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.4rem;
  margin: 0;
  letter-spacing: -0.01em;
}
.card p { color: var(--fg-mut); margin: 0.4rem 0 1.2rem; font-size: 0.96rem; }
.card footer { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.card footer span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.22rem 0.6rem;
}

/* ---- timeline ---- */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  position: relative;
  border-left: 1px solid var(--line);
}
.timeline > li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
  padding: 1.2rem 0 1.2rem 1.6rem;
  position: relative;
}
.timeline > li::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 1.6rem;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.timeline > li:hover::before { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 14px var(--accent); }
.t-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-mut);
  letter-spacing: 0.05em;
  white-space: nowrap;
}
.t-body h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.05rem;
  margin: 0 0 0.2rem;
}
.t-body p { color: var(--fg-mut); margin: 0; font-size: 0.94rem; }
.t-body em { color: var(--fg); font-style: italic; }
@media (max-width: 700px) {
  .timeline > li { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---- skills ---- */
.skills {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}
.skill-group h4 {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.8rem;
}
.skill-group ul { list-style: none; padding: 0; margin: 0; }
.skill-group li {
  font-size: 0.94rem;
  color: var(--fg-mut);
  padding: 0.42rem 0;
  border-bottom: 1px dashed var(--line);
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}
.skill-group li:hover { color: var(--fg); padding-left: 0.4rem; }

/* ---- publications ---- */
.pubs { list-style: none; padding: 0; margin: 0; }
.pubs > li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left var(--t-fast) var(--ease);
}
.pubs > li:hover { padding-left: 0.6rem; }
.pub-year {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.pubs p { margin: 0 0 0.4rem; color: var(--fg); font-size: 1rem; }
.pubs em { color: var(--fg-mut); font-style: italic; }
.pubs a {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  border-bottom: 1px solid transparent;
}
.pubs a:hover { border-color: var(--accent); }
.pub-foot { margin-top: 1.5rem; color: var(--fg-mut); font-size: 0.9rem; }
.pub-foot a { color: var(--fg); border-bottom: 1px solid var(--line); }
.pub-foot a:hover { color: var(--accent); border-color: var(--accent); }
@media (max-width: 600px) {
  .pubs > li { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---- contact ---- */
.contact-lead {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 2.6vw, 2.2rem);
  line-height: 1.3;
  margin: 0 0 2rem;
  max-width: 28ch;
}
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}
.contact-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1.4rem 1.3rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-elev);
  transition: transform 0.4s var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  position: relative;
  overflow: hidden;
}
.contact-card::after {
  content: "→";
  position: absolute;
  top: 1rem; right: 1.1rem;
  color: var(--fg-dim);
  transform: translateX(0) rotate(-45deg);
  transition: transform 0.4s var(--ease), color var(--t-fast) var(--ease);
}
.contact-card:hover { transform: translateY(-3px); border-color: var(--accent); }
.contact-card:hover::after { transform: translateX(4px) translateY(-4px) rotate(-45deg); color: var(--accent); }
.cc-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--fg-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.cc-value {
  font-size: 1rem;
  color: var(--fg);
  padding-right: 1.6rem;
  line-height: 1.35;
}
.cc-email {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: -0.01em;
  word-break: break-word;
}

/* ---- footer ---- */
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 2rem var(--pad) 3rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-dim);
  max-width: var(--max);
  margin: 0 auto;
}
.footer a { color: var(--fg-mut); transition: color var(--t-fast) var(--ease); }
.footer a:hover { color: var(--accent); }
.footer-mid { color: var(--fg-mut); }

/* ---- reveal animation ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ===========================================================
   Blog page styles
   =========================================================== */
.blog-hero {
  padding: 9rem var(--pad) 2rem;
  max-width: var(--max);
  margin: 0 auto;
}
.blog-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.blog-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1;
  margin: 1rem 0 0.6rem;
}
.blog-lead { color: var(--fg-mut); max-width: 60ch; margin: 0 0 2rem; }

.blog-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: lowercase;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--fg-mut);
  padding: 0.4rem 0.9rem;
  border-radius: 999px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.filter-btn:hover { color: var(--fg); border-color: var(--line-strong); }
.filter-btn.is-active { color: var(--bg); background: var(--fg); border-color: var(--fg); }

.posts-list {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem var(--pad) 5rem;
  list-style: none;
}
.posts-list li { padding: 0; }
.post-row {
  display: grid;
  grid-template-columns: 110px 1fr auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  transition: padding-left var(--t-fast) var(--ease);
}
.post-row:hover { padding-left: 0.8rem; }
.post-row:last-child { border-bottom: 1px solid var(--line); }
.post-date {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--fg-dim);
}
.post-title {
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.2vw, 1.7rem);
  font-weight: 500;
  margin: 0;
  letter-spacing: -0.01em;
}
.post-title a {
  background-image: linear-gradient(currentColor, currentColor);
  background-position: 0 100%;
  background-size: 0% 1px;
  background-repeat: no-repeat;
  transition: background-size 0.5s var(--ease), color var(--t-fast) var(--ease);
}
.post-title a:hover { background-size: 100% 1px; color: var(--accent); }
.post-summary { color: var(--fg-mut); margin: 0.3rem 0 0; font-size: 0.96rem; }
.post-cat {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}
@media (max-width: 700px) {
  .post-row { grid-template-columns: 1fr; gap: 0.3rem; }
}

/* ---- post view ---- */
.post-view {
  max-width: 760px;
  margin: 0 auto;
  padding: 9rem var(--pad) 5rem;
}
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--fg-mut);
  margin-bottom: 2rem;
  transition: color var(--t-fast) var(--ease);
}
.post-back:hover { color: var(--accent); }

.post-meta {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--fg-dim);
  letter-spacing: 0.05em;
  margin-bottom: 0.6rem;
}
.post-h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin: 0 0 2.4rem;
}

.post-content { font-size: 1.05rem; line-height: 1.78; color: var(--fg); }
.post-content > * + * { margin-top: 1.3rem; }
.post-content h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.7rem;
  letter-spacing: -0.01em;
  margin-top: 3rem;
}
.post-content h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.2rem;
  margin-top: 2rem;
}
.post-content p { color: var(--fg); }
.post-content a { color: var(--accent); border-bottom: 1px solid transparent; transition: border-color var(--t-fast) var(--ease); }
.post-content a:hover { border-color: var(--accent); }
.post-content blockquote {
  border-left: 2px solid var(--accent);
  padding: 0.4rem 1.2rem;
  margin: 1.6rem 0;
  color: var(--fg-mut);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
}
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  padding: 0.1em 0.4em;
  border-radius: 6px;
}
.post-content pre {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem 1.2rem;
  overflow-x: auto;
  font-size: 0.9rem;
}
.post-content pre code { background: none; border: none; padding: 0; }
.post-content ul, .post-content ol { padding-left: 1.4rem; }
.post-content li { margin: 0.3rem 0; }
.post-content hr { border: none; border-top: 1px solid var(--line); margin: 2.5rem 0; }
.post-content img { max-width: 100%; border-radius: 12px; }

.post-loading, .post-error {
  font-family: var(--font-mono);
  color: var(--fg-mut);
  font-size: 0.9rem;
  padding: 2rem 0;
}
.post-error { color: #ff8585; }