/* ==========================================================================
   Yizhou Lu — personal site
   Theme: "A Researcher's Night Sky"
   Deep warm-charcoal canvas · ember copper accent · editorial serif display
   ========================================================================== */

/* ---------- Tokens ---------- */

:root {
  --bg: #0B0A10;
  --bg-2: #121017;
  --bg-3: #1A1722;

  --text: #EDEAE4;
  --text-2: #ABA59C;
  --text-3: #716C68;

  --accent: #E08856;
  --accent-bright: #F2A87E;
  --accent-deep: #B05F35;
  --on-accent: #190F08;

  --line: rgba(237, 234, 228, 0.09);
  --line-strong: rgba(237, 234, 228, 0.18);
  --accent-line: rgba(224, 136, 86, 0.35);
  --accent-wash: rgba(224, 136, 86, 0.07);

  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-sans: "Instrument Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SF Mono", Menlo, Consolas, monospace;

  --w: min(1100px, 100% - 48px);
  --nav-h: 76px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset / base ---------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
}

img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
[hidden] { display: none !important; }

a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--on-accent); }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: rgba(237, 234, 228, 0.14); border-radius: 8px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: rgba(237, 234, 228, 0.26); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

main, .site-footer { position: relative; z-index: 1; }

.mono-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* Inline content defaults (rendered from markdown) */

.prose-link,
.news-text a,
.tl-detail a,
.contact-sub a,
.callout a,
.col-main a {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: color 0.25s ease, text-decoration-color 0.25s ease;
}

.prose-link:hover,
.news-text a:hover,
.tl-detail a:hover,
.contact-sub a:hover,
.callout a:hover,
.col-main a:hover {
  color: var(--accent-bright);
  text-decoration-color: var(--accent-bright);
}

/* ---------- Global night sky backdrop ---------- */

.sky-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

/* ---------- Film grain ---------- */

.grain {
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  opacity: 0.038;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 160px 160px;
}

/* ---------- Scroll progress ---------- */

.progress-bar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 120;
  pointer-events: none;
}

.progress-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent-bright));
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- Navigation ---------- */

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(20px, 4vw, 48px);
  transition: background 0.4s ease, padding 0.4s ease, border-color 0.4s ease;
  border-bottom: 1px solid transparent;
}

.site-nav.is-scrolled {
  padding-top: 13px;
  padding-bottom: 13px;
  background: rgba(11, 10, 16, 0.72);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}

.nav-brand {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.45rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1;
  color: var(--text);
  transition: color 0.25s ease;
}

.nav-brand:hover { color: var(--accent-bright); }
.brand-dot { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.4vw, 30px);
}

.nav-link {
  position: relative;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 6px 2px;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.35s var(--ease-out);
}

.nav-link:hover { color: var(--text); }
.nav-link:hover::after, .nav-link.is-active::after { right: 0; }
.nav-link.is-active { color: var(--accent-bright); }

.nav-actions { display: flex; align-items: center; gap: 14px; }

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 10px 20px;
  transition: transform 0.3s var(--ease-out), background 0.3s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.btn-accent {
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 500;
}

.btn-accent:hover {
  background: var(--accent-bright);
  box-shadow: 0 6px 28px rgba(224, 136, 86, 0.35);
}

.btn-ghost {
  border: 1px solid var(--line-strong);
  color: var(--text-2);
}

.btn-ghost:hover {
  border-color: var(--accent-line);
  color: var(--accent-bright);
}

/* Burger (mobile) */

.nav-burger {
  display: none;
  position: relative;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
}

.nav-burger span {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.35s var(--ease-out);
}

.nav-burger span:nth-child(1) { transform: translate(-50%, calc(-50% - 3.5px)); }
.nav-burger span:nth-child(2) { transform: translate(-50%, calc(-50% + 3.5px)); }
.nav-burger.is-open span:nth-child(1) { transform: translate(-50%, -50%) rotate(45deg); }
.nav-burger.is-open span:nth-child(2) { transform: translate(-50%, -50%) rotate(-45deg); }

/* ---------- Menu overlay ---------- */

.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 96px clamp(28px, 8vw, 64px) 48px;
  background: rgba(11, 10, 16, 0.96);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.45s ease, visibility 0s linear 0.45s;
}

.menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 0.45s ease;
}

.menu-links { display: flex; flex-direction: column; gap: 6px; }

.menu-link {
  display: flex;
  align-items: baseline;
  gap: 18px;
  font-family: var(--font-serif);
  font-size: clamp(2rem, 7.5vw, 3.2rem);
  font-weight: 500;
  color: var(--text);
  padding: 10px 0;
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out), color 0.25s ease;
  transition-delay: 0s;
}

.menu-overlay.is-open .menu-link {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(0.06s + var(--i, 0) * 0.055s);
}

.menu-link:hover { color: var(--accent-bright); }

.menu-link-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.menu-foot {
  margin-top: 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s var(--ease-out) 0.3s, transform 0.5s var(--ease-out) 0.3s;
}

.menu-overlay.is-open .menu-foot { opacity: 1; transform: translateY(0); }

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

/* The hero is a tall scroll runway; the stage stays stuck while the
   hero text hands over to the research constellation. */
.hero {
  position: relative;
  height: 240vh;
  height: 240svh;
}

body.no-research .hero {
  height: 100vh;
  height: 100svh;
}

.hero-stage {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
}

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(11, 10, 16, 0.3) 0%, transparent 22%, transparent 68%, var(--bg) 99%),
    radial-gradient(ellipse 75% 60% at 50% 42%, transparent 40%, rgba(11, 10, 16, 0.5) 80%, rgba(11, 10, 16, 0.85) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 96px 24px 24px;
  max-width: 1100px;
  will-change: transform, opacity;
}

.hero-kicker {
  font-family: var(--font-mono);
  font-size: clamp(0.66rem, 1.4vw, 0.8rem);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: clamp(20px, 3.5vh, 36px);
}

.hero-name {
  font-family: var(--font-serif);
  font-optical-sizing: auto;
  font-size: clamp(3.4rem, 12.5vw, 10.5rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 0.98;
  color: var(--text);
}

.hero-name .word { display: inline-block; white-space: nowrap; }
.hero-name .word + .word { margin-left: 0.24em; }
.hero-name .char-mask { display: inline-block; overflow: hidden; vertical-align: bottom; }
.hero-name .char { display: inline-block; will-change: transform; }
.hero-name .name-dot { color: var(--accent); }

.hero-tagline {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.7vw, 1.7rem);
  font-weight: 400;
  font-style: italic;
  color: var(--text-2);
  margin-top: clamp(20px, 3.2vh, 32px);
}

.hero-tagline em {
  color: var(--accent-bright);
  font-style: italic;
}

.hero-meta {
  margin-top: clamp(28px, 4.5vh, 48px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-bright);
  border: 1px solid var(--accent-line);
  background: var(--accent-wash);
  border-radius: 999px;
  padding: 10px 20px;
}

.status-pill .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-bright);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(242, 168, 126, 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(242, 168, 126, 0); }
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 9px 17px;
  transition: color 0.25s ease, border-color 0.25s ease, transform 0.3s var(--ease-out), background 0.25s ease;
}

.pill-link svg { width: 13px; height: 13px; flex: none; fill: currentColor; }

.pill-link:hover {
  color: var(--accent-bright);
  border-color: var(--accent-line);
  background: var(--accent-wash);
  transform: translateY(-2px);
}

.hero-foot {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-cue {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.scroll-cue-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--text-3);
}

.scroll-cue-line {
  position: relative;
  width: 1px;
  height: 52px;
  background: var(--line-strong);
  overflow: hidden;
}

.scroll-cue-line i {
  position: absolute;
  left: 0; top: 0;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform-origin: top center;
  animation: cue 2.3s var(--ease-out) infinite;
}

@keyframes cue {
  0% { transform: scaleY(0); transform-origin: top center; }
  45% { transform: scaleY(1); transform-origin: top center; }
  55% { transform: scaleY(1); transform-origin: bottom center; }
  100% { transform: scaleY(0); transform-origin: bottom center; }
}

/* ---------- Section scaffold ---------- */

.section {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  min-height: 100svh;
  padding: clamp(84px, 11vh, 130px) 0;
  overflow: hidden;
}

.section + .section { border-top: 1px solid var(--line); }

.section-ghost {
  position: absolute;
  top: clamp(16px, 4vh, 48px);
  right: -0.06em;
  z-index: 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(9rem, 24vw, 19rem);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1px rgba(237, 234, 228, 0.09);
  pointer-events: none;
  user-select: none;
}

.section-wrap {
  position: relative;
  z-index: 1;
  width: var(--w);
  margin-inline: auto;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: clamp(40px, 7vh, 68px);
}

.section-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.1;
  white-space: nowrap;
}

.section-rule {
  flex: 1;
  height: 1px;
  background: var(--line-strong);
  transform-origin: left center;
}

/* ---------- Research overlay (inside the hero stage) ---------- */

.research-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.topic-layer { position: absolute; inset: 0; }

.topic-label {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--text);
  text-shadow: 0 0 16px rgba(242, 168, 126, 0.3), 0 2px 12px rgba(11, 10, 16, 0.8);
  opacity: 0;
  visibility: hidden;
  will-change: transform, opacity;
}

/* labels only become visible once the 3D engine drives them */
.topic-layer.is-3d .topic-label { visibility: visible; }

@media (max-width: 640px) {
  .topic-label {
    font-size: 0.62rem;
    letter-spacing: 0.12em;
    white-space: normal;
    width: max-content;
    max-width: 118px;
    text-align: center;
    line-height: 1.5;
  }
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: clamp(40px, 6vw, 72px);
  align-items: start;
}

.about-photo { perspective: 900px; }

.tilt {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  transform-style: preserve-3d;
  will-change: transform;
  transition: box-shadow 0.4s ease;
}

.tilt:hover { box-shadow: 0 32px 80px rgba(0, 0, 0, 0.55), 0 8px 48px rgba(224, 136, 86, 0.14); }

.tilt img { width: 100%; aspect-ratio: 1 / 1; object-fit: cover; }

.tilt-shine {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(560px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.16), transparent 55%);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.tilt:hover .tilt-shine { opacity: 1; }

.about-photo figcaption {
  margin-top: 16px;
  text-align: center;
  letter-spacing: 0.18em;
}

.about-prose p {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-2);
}

.about-prose p + p { margin-top: 1.3em; }
.about-prose strong { color: var(--text); font-weight: 600; }

.about-prose em {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.06em;
  color: var(--accent-bright);
}

.callout {
  margin-top: 2em;
  position: relative;
  border: 1px solid var(--accent-line);
  background: var(--accent-wash);
  border-radius: 14px;
  padding: 22px 26px;
}

.callout::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.callout p { font-size: 1rem; color: var(--text-2); }
.callout p + p { margin-top: 0.8em; }
.callout strong { color: var(--accent-bright); font-weight: 600; }

/* ---------- News ---------- */

.news-list { list-style: none; }

.news-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.news-item:first-child { border-top: 1px solid var(--line); }

.news-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  padding-top: 4px;
}

.news-text { font-size: 0.98rem; color: var(--text-2); }
.news-text strong { color: var(--text); font-weight: 600; }

.news-older.is-hidden { display: none; }

.news-toggle {
  margin-top: 28px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
}

.news-toggle svg {
  width: 12px;
  height: 12px;
  fill: currentColor;
  transition: transform 0.35s var(--ease-out);
}

.news-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }

/* ---------- Timeline (Education / Experience) ---------- */

.timeline { position: relative; }

.timeline::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent-line), var(--line) 30%, var(--line) 70%, transparent);
}

.tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  padding: 22px 0;
}

.tl-item + .tl-item { border-top: 1px dashed var(--line); }

.tl-logo {
  position: relative;
  z-index: 1;
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: #F2EEE7;
  display: grid;
  place-items: center;
  border: 1px solid rgba(237, 234, 228, 0.16);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s ease, background 0.4s ease, border-color 0.4s ease;
}

/* once the logo has been converted to a warm-white mono mark */
.tl-logo.is-dark {
  background: rgba(237, 234, 228, 0.045);
  border-color: var(--line-strong);
  box-shadow: none;
}

.tl-logo.is-dark img {
  opacity: 0.88;
  transition: opacity 0.3s ease, filter 0.3s ease;
}

@media (hover: hover) {
  .tl-item:hover .tl-logo.is-dark {
    border-color: var(--accent-line);
    background: var(--accent-wash);
  }

  .tl-item:hover .tl-logo.is-dark img {
    opacity: 1;
    filter: drop-shadow(0 0 10px rgba(242, 168, 126, 0.35));
  }
}

@media (hover: hover) {
  .tl-item:hover .tl-logo {
    transform: translateY(-3px) scale(1.04);
    box-shadow: 0 14px 32px rgba(0, 0, 0, 0.45);
  }

  .tl-item:hover .tl-title { color: var(--accent-bright); }
}

.tl-logo img {
  max-width: 78%;
  max-height: 64%;
  object-fit: contain;
}

.tl-logo--ghost {
  background: var(--bg-3);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--accent);
}

.tl-body { padding-top: 4px; }

.tl-title {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2.2vw, 1.42rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--text);
  transition: color 0.25s ease;
}

.tl-detail {
  margin-top: 7px;
  font-size: 0.93rem;
  color: var(--text-2);
}

.tl-detail em { font-style: italic; color: var(--text-3); }
.tl-detail strong { color: var(--text); font-weight: 600; }

.tl-period {
  margin-top: 10px;
  display: inline-block;
}

/* ---------- Publications ---------- */

.pub-note { margin-bottom: 26px; }

.pub-list { list-style: none; counter-reset: pub; }

.pub {
  position: relative;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 24px;
  padding: 38px 0;
  border-top: 1px solid var(--line);
  transition: border-color 0.3s ease;
}

.pub:last-child { border-bottom: 1px solid var(--line); }

@media (hover: hover) {
  .pub:hover { border-top-color: var(--accent-line); }
  .pub:hover .pub-num { color: var(--accent); }
  .pub:hover .pub-title { color: var(--accent-bright); }
}

.pub-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-3);
  padding-top: 6px;
  transition: color 0.3s ease;
}

.pub-venue {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent-bright);
  border: 1px solid var(--accent-line);
  background: var(--accent-wash);
  border-radius: 999px;
  padding: 5px 13px;
  margin-bottom: 16px;
}

.pub-title {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--text);
  transition: color 0.3s ease;
  max-width: 56rem;
}

.pub-authors {
  margin-top: 12px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--text-2);
  max-width: 52rem;
}

.pub-authors strong {
  color: var(--text);
  font-weight: 600;
  border-bottom: 1px solid var(--accent);
  padding-bottom: 1px;
}

.pub-links {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Columns (Honors & Service) ---------- */

.cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(32px, 4.5vw, 56px);
  align-items: start;
}

.col-title {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 6px;
  color: var(--accent-bright);
  letter-spacing: 0.18em;
}

.col-list { list-style: none; }

.col-list li { padding: 16px 0; border-bottom: 1px solid var(--line); }

.col-main {
  display: block;
  font-size: 0.96rem;
  line-height: 1.55;
  color: var(--text-2);
}

.col-main strong { color: var(--text); font-weight: 600; }

.col-meta {
  display: block;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ---------- Contact ---------- */

.section--contact { text-align: center; }
.section--contact .section-head { justify-content: center; }
.section--contact .section-rule { display: none; }

.contact-headline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(2.1rem, 5.6vw, 4rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.015em;
  max-width: 22ch;
  margin-inline: auto;
}

.contact-headline .accent-word { color: var(--accent-bright); }

.contact-sub {
  margin: 28px auto 0;
  max-width: 54ch;
  font-size: 1rem;
  color: var(--text-2);
}

.contact-email {
  margin-top: clamp(36px, 6vh, 56px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 18px;
}

.email-big {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 4vw, 2.4rem);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent-line);
  text-decoration-thickness: 1px;
  text-underline-offset: 8px;
  transition: color 0.3s ease, text-decoration-color 0.3s ease;
  word-break: break-all;
}

.email-big:hover { color: var(--accent-bright); text-decoration-color: var(--accent-bright); }

.copy-btn { position: relative; }
.copy-btn.is-copied { border-color: var(--accent-line); color: var(--accent-bright); }

.contact-links {
  margin-top: 36px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

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

.site-footer { border-top: 1px solid var(--line); }

.footer-inner {
  width: var(--w);
  margin-inline: auto;
  padding: 44px 0 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.footer-note {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  opacity: 0.7;
}

.footer-counter {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(237, 234, 228, 0.025);
  padding: 8px 12px 8px 14px;
  opacity: 0;
  transform: translateY(4px);
  transition:
    opacity 0.35s ease,
    transform 0.35s var(--ease-out),
    color 0.25s ease,
    border-color 0.25s ease,
    background 0.25s ease;
}

.footer-counter.is-loaded {
  opacity: 1;
  transform: translateY(0);
}

.footer-counter:hover {
  color: var(--accent-bright);
  border-color: var(--accent-line);
  background: var(--accent-wash);
}

.footer-counter-label {
  white-space: nowrap;
}

.footer-counter-value {
  min-width: 2.2ch;
  padding: 2px 7px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: rgba(224, 136, 86, 0.1);
  color: var(--accent-bright);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.45;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ---------- Loading / error states ---------- */

.hero-inner, .hero-foot, #sections, .site-footer {
  transition: opacity 0.7s ease;
}

body.is-loading .hero-inner,
body.is-loading .hero-foot,
body.is-loading #sections,
body.is-loading .site-footer {
  opacity: 0;
}

/* When GSAP drives the hero entrance, CSS must not double-fade it */
body.has-motion .hero-inner { transition: none; opacity: 1; }

.load-error {
  width: min(640px, 92vw);
  margin: 0 auto;
  padding: 28px 30px;
  border: 1px solid var(--accent-line);
  background: var(--accent-wash);
  border-radius: 14px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--text-2);
}

.load-error code {
  color: var(--accent-bright);
  background: rgba(224, 136, 86, 0.12);
  padding: 2px 8px;
  border-radius: 6px;
}

.noscript-box {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg);
  display: grid;
  place-content: center;
  text-align: center;
  gap: 16px;
  padding: 24px;
}

.noscript-box h1 { font-family: var(--font-serif); font-size: 3rem; }
.noscript-box a { color: var(--accent-bright); text-decoration: underline; }

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 400px; }
  .cols { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 940px) {
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .nav-cv { display: none; }

  .news-item { grid-template-columns: 1fr; gap: 6px; padding: 15px 0; }
  .news-date { padding-top: 0; }

  .pub { grid-template-columns: 1fr; gap: 10px; padding: 30px 0; }
  .pub-num { padding-top: 0; }
}

@media (max-width: 640px) {
  .cols { grid-template-columns: 1fr; }

  .timeline::before { left: 25px; }
  .tl-item { grid-template-columns: 52px 1fr; gap: 18px; }
  .tl-logo { width: 52px; height: 52px; border-radius: 13px; }

  .section-head { flex-wrap: wrap; gap: 12px; }
  .section-rule { flex-basis: 100%; }

  .hero-inner { padding-top: 84px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .hero-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

  .hero-kicker {
    max-width: 28ch;
    margin-inline: auto;
    line-height: 1.85;
    letter-spacing: 0.24em;
  }

  .hero-meta {
    margin-top: 26px;
    gap: 16px;
  }

  .status-pill {
    max-width: 100%;
    justify-content: center;
    text-align: center;
    white-space: normal;
    line-height: 1.65;
  }
}

@media (max-width: 420px) and (max-height: 680px) {
  .hero-foot { display: none; }
  .hero-tagline { margin-top: 18px; }
  .hero-meta { margin-top: 22px; gap: 14px; }
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *, *::before, *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }

  .scroll-cue-line i { animation: none; transform: scaleY(1); }
  .status-pill .dot { animation: none; }
}