/* ============================================================
   LUNA Lab — Shared Stylesheet
   Colors: #940000 (primary), #ff5858 (accent), #ffffff (white)
   ============================================================ */

/* ── Factoria (custom font — place files in /fonts/) ── */
@font-face {
  font-family: 'Factoria';
  src: url('../fonts/Factoria-Medium.woff2') format('woff2'),
       url('../fonts/Factoria-Medium.woff')  format('woff'),
       url('../fonts/Factoria-Medium.otf')   format('opentype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Factoria';
  src: url('../fonts/Factoria-SemiBold.woff2') format('woff2'),
       url('../fonts/Factoria-SemiBold.woff')  format('woff'),
       url('../fonts/Factoria-SemiBold.otf')   format('opentype');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Factoria';
  src: url('../fonts/Factoria-Bold.woff2') format('woff2'),
       url('../fonts/Factoria-Bold.woff')  format('woff'),
       url('../fonts/Factoria-Bold.otf')   format('opentype');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --luna-primary:    #940000;
  --luna-primary-dk: #6b0000;
  --luna-accent:     #ff5858;
  --luna-white:      #ffffff;
  --luna-dark:       #1a0000;
  --luna-gray:       #f5f5f5;
  --luna-gray-mid:   #d0d0d0;
  --luna-text:       #1c1c1c;
  --luna-text-light: #555555;
  --nav-height:      70px;
  --font-display: 'Factoria', 'Georgia', serif;   /* headings & titles */
  --font-sans: 'Inter', 'Segoe UI', Arial, sans-serif;  /* body */
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  color: var(--luna-text);
  background: var(--luna-white);
  line-height: 1.65;
}
a { color: var(--luna-primary); text-decoration: none; }
a:hover { color: var(--luna-accent); text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ── Google Fonts (body + mono) ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── Factoria applied to all display headings ── */
h1, h2, h3,
.section-title,
.luna-hero-content h1,
.page-header h1,
.pub-year-label,
.pi-card h3,
.join-card h3,
.contact-block h2,
.contact-block h3,
.footer-links h4,
nav.luna-nav .nav-logo span {
  font-family: var(--font-display);
  letter-spacing: -0.01em;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
nav.luna-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--luna-primary);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
}

nav.luna-nav .nav-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}
nav.luna-nav .nav-logo img {
  height: 44px;
  width: auto;
}
nav.luna-nav .nav-logo span {
  font-size: 1rem;
  font-weight: 600;
  color: var(--luna-primary);
  letter-spacing: 0.03em;
}

nav.luna-nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}
nav.luna-nav .nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--luna-text);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
  transition: color 0.2s;
}
nav.luna-nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: var(--luna-accent);
  transform: scaleX(0);
  transition: transform 0.2s;
}
nav.luna-nav .nav-links a:hover,
nav.luna-nav .nav-links a.active {
  color: var(--luna-primary);
  text-decoration: none;
}
nav.luna-nav .nav-links a:hover::after,
nav.luna-nav .nav-links a.active::after {
  transform: scaleX(1);
}

/* Hamburger (mobile) */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 14px 10px;      /* 44x44 touch target (WCAG 2.5.5) */
  margin: -10px -6px;      /* …without moving the bars visually */
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--luna-primary);
  transition: all 0.2s;
}

@media (max-width: 768px) {
  .nav-hamburger { display: flex; }
  nav.luna-nav .nav-links {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    background: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 2px solid var(--luna-primary);
    display: none;
  }
  nav.luna-nav .nav-links.open { display: flex; }
}

/* ============================================================
   PAGE WRAPPER
   ============================================================ */
main { padding-top: var(--nav-height); }

/* ============================================================
   HERO (index.html)
   ============================================================ */
.luna-hero {
  position: relative;
  width: 100%;
  height: calc(100vh - var(--nav-height));
  min-height: 520px;
  background: var(--luna-dark);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* The hero pulls the next section up over its white bottom band (JS sets a negative
   margin); keep that section's content above the hero. */
.luna-hero { z-index: 0; }
.luna-hero + * { position: relative; z-index: 1; }
/* Bottom edge cut by LUNA logo blocks (drawn by js/animation.js) */
#luna-edge-canvas {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%; height: 330px;   /* set by animation.js to one mark tall */
  z-index: 7;                   /* above canvas, vignette and glow; below the title & scroll cue */
  pointer-events: none;
}

#luna-grid-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.80; /* letter monogram — vignette handles centre legibility */
  /* soft hand-off: letters dissolve toward the bottom edge */
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 58%, rgba(0,0,0,0.55) 80%, transparent 100%);
          mask-image: linear-gradient(to bottom, #000 0%, #000 58%, rgba(0,0,0,0.55) 80%, transparent 100%);
}
/* soft hand-off into the About section: a warm glow rising from the bottom edge */
.luna-hero::before {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 34%;
  z-index: 6;               /* above canvas + vignette, below content */
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(148,0,0,0) 0%, rgba(148,0,0,0.12) 45%, rgba(148,0,0,0.30) 100%);
}
/* faint scroll cue at the bottom of the hero: three rounded chevrons that ripple downward */
.hero-scroll-cue {
  position: absolute;
  left: 50%;
  bottom: var(--hero-cue, 1.2rem);   /* set by animation.js: inside the upper half of the bottom fade */
  transform: translateX(-50%);
  z-index: 10;
  width: 44px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  border-radius: 8px;
  transition: color 0.2s;
}
.hero-scroll-cue:hover { color: rgba(255,255,255,0.9); text-decoration: none; }
.hero-scroll-cue svg { width: 26px; height: 44px; display: block; overflow: visible; }
.hero-scroll-cue path { animation: hero-cue-ripple 2.1s ease-in-out infinite; opacity: 0.25; }
.hero-scroll-cue .cue-2 { animation-delay: 0.22s; }
.hero-scroll-cue .cue-3 { animation-delay: 0.44s; }
@keyframes hero-cue-ripple {
  0%, 60%, 100% { opacity: 0.22; transform: translateY(0); }
  30%           { opacity: 0.95; transform: translateY(2px); }
}

.luna-hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  color: white;
  padding: 2rem;
  max-width: 800px;
}
.luna-hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.luna-hero-content h1 .highlight {
  color: var(--luna-accent);
}
.luna-hero-content .hero-sub {
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  color: rgba(255,255,255,0.8);
  margin-top: 0.8rem;
  font-weight: 400;
}
.luna-hero-content .hero-tagline {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--luna-accent);
  margin-top: 1.2rem;
  opacity: 0.9;
  letter-spacing: 0.05em;
}

/* ============================================================
   SQUARE MOTIF (decorative, from LUNA logo aesthetic)
   ============================================================ */
.luna-square-motif {
  display: inline-grid;
  grid-template-columns: repeat(3, 8px);
  gap: 2px;
  vertical-align: middle;
  margin: 0 6px;
}
.luna-square-motif span {
  width: 8px; height: 8px;
  border-radius: 1px;
}
.luna-square-motif span.s-red  { background: var(--luna-accent); }
.luna-square-motif span.s-dark { background: var(--luna-primary); }
.luna-square-motif span.s-white { background: white; border: 1px solid var(--luna-gray-mid); }

/* Larger square accent bar */
.luna-section-accent {
  display: flex;
  gap: 5px;
  margin-bottom: 1.2rem;
  align-items: center;
}
.luna-section-accent .sq {
  width: 12px; height: 12px;
  border-radius: 2px;
}
.luna-section-accent .sq-1 { background: var(--luna-primary); }
.luna-section-accent .sq-2 { background: var(--luna-accent); }
.luna-section-accent .sq-3 { background: var(--luna-gray-mid); }

/* ============================================================
   SECTIONS — general
   ============================================================ */
.luna-section {
  padding: 5rem 0;
}
.luna-section-alt {
  background: var(--luna-gray);
}
.luna-container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 2rem;
}
.section-title {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--luna-primary);
  margin-bottom: 1.5rem;
}
.section-title .accent { color: var(--luna-accent); }

/* ============================================================
   ABOUT SECTION (index)
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.about-grid p {
  margin-bottom: 1rem;
  color: var(--luna-text-light);
  font-size: 0.97rem;
}
.about-grid p strong { color: var(--luna-text); }

.research-themes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
.theme-card {
  background: white;
  border: 1.5px solid var(--luna-gray-mid);
  border-left: 4px solid var(--luna-accent);
  border-radius: 6px;
  padding: 1rem 1.1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.theme-card:hover {
  border-color: var(--luna-primary);
  box-shadow: 0 4px 16px rgba(148,0,0,0.08);
}
.theme-card h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--luna-primary);
  margin-bottom: 0.3rem;
}
.theme-card p {
  font-size: 0.82rem;
  margin: 0;
  color: var(--luna-text-light);
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
  .research-themes { grid-template-columns: 1fr; }
}

/* ============================================================
   SPONSORS SCROLL
   ============================================================ */
.sponsors-section {
  background: white;
  padding: 2.5rem 0;
  overflow: hidden;
  border-bottom: 1px solid var(--luna-gray-mid);
}
.sponsors-label {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--luna-text-light);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.sponsors-track-wrapper {
  overflow: hidden;
  position: relative;
  /* fade edges */
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}
.sponsors-track {
  display: flex;
  align-items: center;
  gap: 5rem;
  width: max-content;
  animation: sponsors-scroll 18s linear infinite;
}
.sponsors-track:hover { animation-play-state: paused; }

.sponsor-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  flex-shrink: 0;
}
.sponsor-logo img { height: 44px; width: auto; max-width: 220px; object-fit: contain; }
/* very wide wordmark: a bit shorter so it sits in balance with NVIDIA */
.sponsor-logo img[src*="one-u-rai"] { height: 34px; max-width: 420px; }
.sponsor-logo .sponsor-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--luna-text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Few sponsors → a calm, centred row. The duplicate set (only needed for the
   infinite scroll) is hidden. To bring the scrolling marquee back once there are
   many logos, add class="scrolling" to .sponsors-track in index.html. */
.sponsors-track:not(.scrolling) {
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3.5rem;
  animation: none;
}
.sponsors-track:not(.scrolling) .sponsor-logo[aria-hidden="true"] { display: none; }
.sponsors-track-wrapper:has(.sponsors-track:not(.scrolling)) {
  -webkit-mask-image: none; mask-image: none;
}

/* Sponsor row on phones: stack the logos and keep the wide One-U wordmark inside the screen */
@media (max-width: 640px) {
  .sponsors-track:not(.scrolling) { gap: 1.6rem; padding: 0 1.5rem; }
  .sponsor-logo { height: auto; max-width: 100%; }
  .sponsor-logo img { height: 32px; max-width: 100%; }
  .sponsor-logo img[src*="one-u-rai"] { height: auto; width: min(280px, 78vw); max-width: 78vw; }
}

@keyframes sponsors-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================================
   PUBLICATIONS PAGE
   ============================================================ */
.pub-year-group { margin-bottom: 3rem; }
.pub-year-label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--luna-primary);
  border-bottom: 2px solid var(--luna-accent);
  padding-bottom: 0.4rem;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.pub-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--luna-gray-mid);
  align-items: start;
}
.pub-card:last-child { border-bottom: none; }

.pub-thumb {
  width: 200px;
  height: auto;
  aspect-ratio: 16 / 9;     /* matches the 16:9 paper covers, so nothing gets cropped */
  border-radius: 6px;
  overflow: hidden;
  background: var(--luna-gray);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--luna-gray-mid);
  position: relative;
}
.pub-thumb img { width: 100%; height: 100%; object-fit: contain; background: #fff; }   /* show the whole figure */
/* Thumbnail that plays the paper's video */
a.pub-thumb.has-video { cursor: pointer; text-decoration: none; }
a.pub-thumb.has-video img { transition: transform 0.35s ease, filter 0.35s ease; }
a.pub-thumb.has-video:hover img,
a.pub-thumb.has-video:focus-visible img { transform: scale(1.04); filter: brightness(0.82); }
.play-badge {
  position: absolute;
  right: 8px; bottom: 8px;
  width: 34px; height: 34px;
  border-radius: 8px;                    /* rounded square — LUNA block */
  background: rgba(148,0,0,0.92);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  transition: transform 0.2s ease, background 0.2s ease;
}
.play-badge svg { width: 18px; height: 18px; fill: #fff; margin-left: 2px; }
a.pub-thumb.has-video:hover .play-badge,
a.pub-thumb.has-video:focus-visible .play-badge { transform: scale(1.1); background: var(--luna-accent); }
.pub-thumb .thumb-placeholder {
  width: 100%; height: 100%;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(5, 1fr);
  gap: 2px;
  padding: 8px;
  background: var(--luna-dark);
}
.pub-thumb .thumb-placeholder .sq {
  border-radius: 1px;
  opacity: 0.7;
}

.pub-info .pub-venue {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--luna-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.4rem;
}
.pub-info h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--luna-text);
  line-height: 1.4;
  margin-bottom: 0.5rem;
}
.pub-info .pub-authors {
  font-size: 0.85rem;
  color: var(--luna-text-light);
  margin-bottom: 0.6rem;
}
.pub-info .pub-authors strong { color: var(--luna-text); }
.pub-info .pub-desc {
  font-size: 0.84rem;
  color: var(--luna-text-light);
  line-height: 1.55;
  margin-bottom: 0.7rem;
}
.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  border: 1.5px solid var(--luna-primary);
  color: var(--luna-primary);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.pub-link:hover {
  background: var(--luna-primary);
  color: white;
  text-decoration: none;
}
.pub-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}
.pub-tag {
  font-size: 0.73rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  background: rgba(148,0,0,0.08);
  color: var(--luna-primary);
  font-weight: 500;
}

@media (max-width: 640px) {
  .pub-card { grid-template-columns: 1fr; }
  .pub-thumb { width: 100%; height: auto; }
}

/* ============================================================
   TEAM PAGE
   ============================================================ */
.team-section-label {
  font-family: var(--font-sans);
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--luna-text-light);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.team-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--luna-gray-mid);
}

/* PI card */
.pi-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  align-items: start;
  padding: 2rem;
  background: white;
  border: 1.5px solid var(--luna-gray-mid);   /* plain grey all round, like the member cards */
  border-radius: 10px;
  margin-bottom: 3rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}
.pi-card .pi-photo {
  width: 180px; height: 180px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--luna-gray);
  border: 2px solid var(--luna-gray-mid);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.pi-card .pi-photo img { width: 100%; height: 100%; object-fit: cover; }
.pi-card h3 { font-size: 1.4rem; font-weight: 700; color: var(--luna-text); }
.pi-card .pi-title { font-size: 0.9rem; color: var(--luna-accent); font-weight: 600; margin: 0.2rem 0 0.8rem; }
.pi-card .pi-bio { font-size: 0.88rem; color: var(--luna-text-light); line-height: 1.6; margin-bottom: 1rem; }
.pi-card .pi-links { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.pi-card .pi-links a {
  font-size: 0.8rem; font-weight: 500;
  padding: 0.3rem 0.9rem;
  border-radius: 20px;
  border: 1.5px solid var(--luna-primary);
  color: var(--luna-primary);
  text-decoration: none;
  transition: all 0.15s;
}
.pi-card .pi-links a:hover { background: var(--luna-primary); color: white; }

/* Member grid */
.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.member-card {
  background: white;
  border: 1.5px solid var(--luna-gray-mid);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
  position: relative;
}
.member-card:hover {
  box-shadow: 0 8px 28px rgba(148,0,0,0.12);
  transform: translateY(-3px);
}
/* (no longer used — cards now have a plain grey border) */
.member-card-strip {
  height: 8px;
  display: flex;
}
.member-card-strip span {
  flex: 1;
}
.member-card-strip .s1 { background: var(--luna-primary); }
.member-card-strip .s2 { background: var(--luna-accent); }
.member-card-strip .s3 { background: var(--luna-primary-dk); }

.member-card .member-photo {
  /* same size and frame as the PI photo */
  width: 180px; height: 180px;
  margin: 1.3rem 1.1rem 0;
  border-radius: 8px;
  border: 2px solid var(--luna-gray-mid);
  background: var(--luna-gray);
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.member-card .member-photo img { width: 100%; height: 100%; object-fit: cover; }
.member-card .member-photo .photo-placeholder {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 3px;
  padding: 20px;
  width: 100%; height: 100%;
  background: var(--luna-dark);
}
.member-card .member-photo .photo-placeholder .sq {
  border-radius: 2px;
  opacity: 0.5;
}
.member-info {
  padding: 1rem 1.1rem 1.2rem;
}
@media (max-width: 640px) {
  .member-card .member-photo { width: 120px; height: 120px; }
}
.member-info h3,
.member-info h4 { font-family: var(--font-sans); letter-spacing: normal; font-size: 0.95rem; font-weight: 600; margin-bottom: 0.2rem; }
.member-info .member-role { font-size: 0.78rem; color: var(--luna-accent); font-weight: 600; margin-bottom: 0.4rem; }
.member-info .member-interests { font-size: 0.78rem; color: var(--luna-text-light); line-height: 1.5; margin-bottom: 0.7rem; }
.member-info .member-links { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.member-info .member-links a {
  font-size: 0.73rem; font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  border: 1px solid var(--luna-primary);
  color: var(--luna-primary);
  text-decoration: none;
  transition: all 0.15s;
}
.member-info .member-links a:hover { background: var(--luna-primary); color: white; }

/* Former students: compact list */
.alumni-list { list-style: none; margin: 0 0 3rem; padding: 0; }
.alumni-list li {
  display: flex; flex-wrap: wrap; align-items: baseline;
  gap: 0.35rem 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--luna-gray-mid);
  text-align: left;
}
.alumni-name  { font-weight: 600; color: var(--luna-text); min-width: 12rem; }
.alumni-name a { color: inherit; }
.alumni-role  { font-size: 0.88rem; color: var(--luna-text-light); }
.alumni-years { font-size: 0.85rem; color: var(--luna-text-light); }
.alumni-next  { font-size: 0.85rem; color: var(--luna-primary); }
.alumni-links { margin-left: auto; display: flex; gap: 0.4rem; }
.alumni-links a {
  font-size: 0.73rem; font-weight: 500;
  padding: 0.15rem 0.6rem;
  border-radius: 12px;
  border: 1px solid var(--luna-primary);
  color: var(--luna-primary);
  text-decoration: none;
}
.alumni-links a:hover { background: var(--luna-primary); color: #fff; }

@media (max-width: 640px) {
  .alumni-links { margin-left: 0; flex-basis: 100%; }
  .pi-card { grid-template-columns: 1fr; }
  .pi-card .pi-photo { width: 120px; height: 120px; }
}

/* ============================================================
   JOIN (Work with us) PAGE
   ============================================================ */
.join-intro {
  font-size: 1.05rem;
  color: var(--luna-text-light);
  max-width: none;          /* same width as the cards and note below */
  margin-bottom: 3rem;
  line-height: 1.7;
}
.join-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
@media (max-width: 768px) {
  /* Swipeable card row on phones (desktop keeps the grid) */
  .join-cards {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scroll-padding: 0 1rem;
    gap: 1rem;
    margin: 0 -2rem 3rem;         /* bleed to the screen edge so the next card peeks in */
    padding: 0.25rem 2rem 1rem;
    scrollbar-width: thin;
  }
  .join-cards .join-card {
    flex: 0 0 86%;
    scroll-snap-align: center;
  }
}
.join-card {
  background: white;
  border: 1.5px solid var(--luna-gray-mid);
  border-radius: 10px;
  padding: 1.8rem;
  position: relative;
  overflow: hidden;
}
.join-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--luna-primary), var(--luna-accent));
}
.join-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--luna-primary);
  margin-bottom: 0.8rem;
}
.join-card p {
  font-size: 0.88rem;
  color: var(--luna-text-light);
  line-height: 1.65;
  margin-bottom: 0.6rem;
}
.join-card ul {
  list-style: none;
  margin: 0.6rem 0;
}
.join-card ul li {
  font-size: 0.85rem;
  color: var(--luna-text-light);
  padding: 0.25rem 0 0.25rem 1.1rem;
  position: relative;
}
.join-card ul li::before {
  content: '▪';
  color: var(--luna-accent);
  position: absolute;
  left: 0;
}
.join-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.2rem;
  border-radius: 6px;
  background: var(--luna-primary);
  color: white;
  text-decoration: none;
  transition: background 0.15s;
}
.join-btn:hover { background: var(--luna-accent); color: white; text-decoration: none; }

.research-areas-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1rem 0;
}
.research-area-tag {
  font-size: 0.82rem;
  font-weight: 500;
  padding: 0.35rem 0.9rem;
  border-radius: 20px;
  background: rgba(148,0,0,0.08);
  color: var(--luna-primary);
  border: 1px solid rgba(148,0,0,0.2);
}

/* ============================================================
   CONTACT PAGE
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.contact-block h2,
.contact-block h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--luna-primary);
  margin-bottom: 0.8rem;
}
.contact-block p {
  font-size: 0.92rem;
  color: var(--luna-text-light);
  line-height: 1.7;
}
.contact-block a { color: var(--luna-primary); }
.contact-map {
  width: 100%;
  height: 320px;
  border-radius: 8px;
  overflow: hidden;
  border: 1.5px solid var(--luna-gray-mid);
}
.contact-map iframe { width: 100%; height: 100%; border: none; }

@media (max-width: 768px) {
  .contact-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   FOOTER
   ============================================================ */
footer.luna-footer {
  background: var(--luna-dark);
  color: rgba(255,255,255,0.8);
  padding: 3rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2rem;
}
.footer-brand .footer-logo img { height: 40px; margin-bottom: 0.8rem; border-radius: 4px; } /* luna-logo.png has a white background: show it as-is (no filter) */
.footer-brand p { font-size: 0.84rem; color: rgba(255,255,255,0.5); line-height: 1.6; max-width: 280px; }
.footer-links h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
  margin-bottom: 0.8rem;
}
.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 0.5rem; }
.footer-links ul li a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.15s;
}
.footer-links ul li a:hover { color: var(--luna-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom .accent { color: var(--luna-accent); }
/* Footer square motif row */
.footer-squares {
  display: flex;
  gap: 4px;
  margin-bottom: 1.2rem;
}
.footer-squares span {
  width: 10px; height: 10px;
  border-radius: 2px;
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .nav-hamburger { display: flex; }
}

/* ============================================================
   UTILITY
   ============================================================ */
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 2rem; }
.text-accent { color: var(--luna-accent); }
.text-primary { color: var(--luna-primary); }

/* Page header (non-home pages) — same dark cover as the homepage, smaller:
   logo-block tiles on the right and one mark carved into the bottom-right corner
   (both drawn by js/animation.js) */
.page-header {
  background: #090000;       /* = homepage hero (#1a0000 under the 80% #050000 canvas) */
  color: white;
  padding: 4rem 0 3rem;
  position: relative;
  overflow: hidden;
}
.page-header::before {       /* warm glow toward the bottom, like the hero */
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(148,0,0,0) 30%, rgba(148,0,0,0.28) 100%);
  pointer-events: none;
}
.page-header .luna-container { position: relative; z-index: 10; }
.page-grid-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.80;
  pointer-events: none;
  /* tiles only on the right, fading in from the middle */
  -webkit-mask-image: linear-gradient(to right, transparent 35%, rgba(0,0,0,0.6) 60%, #000 85%);
          mask-image: linear-gradient(to right, transparent 35%, rgba(0,0,0,0.6) 60%, #000 85%);
}
.page-edge-canvas {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  width: 100%; height: 0;   /* height set by animation.js */
  z-index: 2;
  pointer-events: none;
}
.page-header h1 {
  font-size: 2.2rem;
  font-weight: 700;
  position: relative;
}
.page-header p {
  font-size: 1rem;
  color: rgba(255,255,255,0.75);
  margin-top: 0.5rem;
  position: relative;
}


/* ============================================================
   JUSTIFIED BODY TEXT — paragraphs and list items in page content are justified
   ============================================================ */
main p,
main li {
  text-align: justify;
  text-justify: inter-word;
  -webkit-hyphens: auto;
  hyphens: auto;            /* breaks long words so justified lines don't get big gaps */
}
/* keep centred / single-line text as it was */
.luna-hero-content p,
.page-header p,
.research-area-tag,
.interest-tag,
.pub-tag {
  text-align: inherit;
  -webkit-hyphens: manual;
  hyphens: manual;
}

/* ============================================================
   ACCESSIBILITY (no visual change for mouse users)
   ============================================================ */
/* Screen-reader-only text */
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
/* Skip link — hidden until it receives keyboard focus */
.skip-link {
  position: absolute;
  top: 0; left: 0;
  z-index: 2000;
  transform: translateY(-120%);
  background: var(--luna-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.6rem 1rem;
  border-radius: 0 0 6px 0;
  text-decoration: none;
  transition: transform 0.15s;
}
.skip-link:focus {
  transform: translateY(0);
  outline: 3px solid var(--luna-accent);
  outline-offset: 2px;
}
/* Visible focus ring for keyboard users only (:focus-visible) */
a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible,
iframe:focus-visible {
  outline: 3px solid var(--luna-accent);
  outline-offset: 3px;
  border-radius: 3px;
}
.join-btn:focus-visible,
.pub-link:focus-visible,
.pi-card .pi-links a:focus-visible,
.member-info .member-links a:focus-visible {
  outline-color: var(--luna-primary);
  outline-offset: 2px;
}
.luna-hero-content a:focus-visible,
.hero-scroll-cue:focus-visible,
footer.luna-footer a:focus-visible {
  outline-color: #fff;
}

/* Respect reduced-motion preferences */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .sponsors-track { animation: none; }
  .hero-scroll-cue path { animation: none; opacity: 0.7; }
  .member-card:hover { transform: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}