:root{
  /* Accent palette (blue-forward, reduced pink) */
  --miku:#1f8fdf;          /* cooler azure */
  --miku-2:#9ab9ff;        /* cool periwinkle */
  --pink:#c78ab2;          /* softer rose */
  --pink-2:#e8bfd7;        /* pale rose */
  --ink:#2b2351;           /* deep purple */
  --muted:#5f5a7d;
  --gold:#8b1e2d;          /* deep red accent */
  --gold-2:#a32738;

  --bg:#ffffff;
  --surface: rgba(255,255,255,.86);
  --surface-2:#f7f8fb;

  --border: rgba(17,19,24,.10);
  --border-2: rgba(17,19,24,.06);
  --shadow: 0 14px 34px rgba(17,19,24,.10);
  --shadow-2: 0 8px 20px rgba(17,19,24,.07);
  --radius: 18px;
  --max: 1100px;
}

*{box-sizing:border-box}
html,body{
  margin:0;padding:0;
  font-family: "Avenir Next", Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 400;
  color: var(--ink);
  background:
    radial-gradient(1200px 680px at 12% -6%, rgba(31,143,223,.34), transparent 60%),
    radial-gradient(920px 560px at 88% 2%, rgba(154,185,255,.24), transparent 62%),
    radial-gradient(760px 460px at 76% 78%, rgba(199,138,178,.10), transparent 64%),
    linear-gradient(180deg, #f8fbff 0%, #f1f7ff 56%, #f8fbff 100%);
}

/* subtle "sparkle" dots using repeating gradients */
body:before{
  content:"";
  position: fixed;
  inset: 0;
  pointer-events:none;
  background:
    radial-gradient(circle at 20% 30%, rgba(31,143,223,.20) 0 2.4px, transparent 3.8px),
    radial-gradient(circle at 80% 25%, rgba(154,185,255,.16) 0 2.2px, transparent 3.6px),
    radial-gradient(circle at 65% 70%, rgba(127,195,255,.18) 0 2.1px, transparent 3.6px),
    radial-gradient(circle at 40% 65%, rgba(31,143,223,.12) 0 1.8px, transparent 3.2px);
  opacity: .62;
  filter: blur(0);
  z-index: 0;
  animation: none;
}

/* secondary faint star layer for depth */
body:after{
  content:"";
  position: fixed;
  inset: -4%;
  pointer-events:none;
  background-image:
    radial-gradient(rgba(255,255,255,.90) 1.4px, transparent 2.2px),
    radial-gradient(rgba(126,171,255,.52) 1.2px, transparent 2px);
  background-size: 100px 100px, 140px 140px;
  background-position: 0 0, 60px 30px;
  opacity: .5;
  filter: blur(0);
  z-index: 0;
  animation: none;
}


/* links */
a{color: var(--miku); text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width: var(--max); margin:0 auto; padding: 0 18px;}

/* NAV — glassy, event-site style */
.nav{
  position: sticky; top:0; z-index:30;
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  overflow: visible;
  isolation: isolate;
}
.nav-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 18px 0; gap: 14px;
  position: relative;
  z-index: 31;
}

.brand{display:flex; align-items:center; gap:10px; min-width: 240px;}
.brand{
  color: inherit;
  text-decoration: none;
}
.brand:hover{
  text-decoration: none;
}
.logo{
  width:58px; height:58px; border-radius: 10px;
  background-image: url("../img/tang-lab-logo.png");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}
.brand strong{
  font-weight: 650;
  font-size: 24px;
  letter-spacing: -.2px;
}

.menu{
  display:flex;
  flex-wrap:nowrap;
  gap:8px;
  justify-content:flex-end;
}

.nav-right{
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  min-width: 0;
  position: relative;
  z-index: 40;
}

.menu-toggle{
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,.94);
  color: var(--ink);
  font: inherit;
  font-size: 16px;
  font-weight: 600;
  box-shadow: var(--shadow-2);
  cursor: pointer;
}

.menu-toggle-icon{
  width: 18px;
  height: 12px;
  position: relative;
  display: inline-block;
}

.menu-toggle-icon::before,
.menu-toggle-icon::after,
.menu-toggle-icon{
  border-top: 2px solid currentColor;
}

.menu-toggle-icon::before,
.menu-toggle-icon::after{
  content:"";
  position: absolute;
  left: 0;
  width: 18px;
}

.menu-toggle-icon::before{
  top: 4px;
}

.menu-toggle-icon::after{
  top: 10px;
}

  .mobile-menu-panel{
    display: none;
  }

body > .mobile-menu-panel{
  position: fixed;
  z-index: 99999;
}

.menu a{
  padding: 8px 10px;
  border-radius: 999px;
  color: var(--ink);
  font-weight: 500;
  font-size: 17px;
  border: 1px solid transparent;
  white-space: nowrap;
}

.mit-wordmark{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
}

.mit-wordmark img{
  display: block;
  height: 36px;
  width: auto;
  object-fit: contain;
}

.mit-wordmark:hover{
  text-decoration: none;
}
.menu a.active, .menu a:hover{
  border-color: var(--border);
  background: rgba(17,19,24,.03);
  text-decoration:none;
}

/* HERO */
.hero{padding: 52px 0 18px;}
.hero-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 18px;
  align-items:stretch;
}

/* Hero card with "stage light ribbons" */
.hero-card{
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  overflow:hidden;
}
.hero-card:before{
  content:"";
  position:absolute;
  inset:-40% -20%;
  background:
    linear-gradient(115deg,
      transparent 0%,
      rgba(42,167,214,.20) 20%,
      rgba(217,112,179,.08) 45%,
      rgba(127,195,255,.16) 70%,
      transparent 100%);
  transform: rotate(-8deg);
  filter: blur(0px);
  opacity: .85;
}
.hero-card > *{position: relative; z-index: 1;}

h1{
  margin:0 0 12px;
  font-size: 44px;
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.8px;
  padding-bottom: 2px;
}
p.lead{
  margin:0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.7;
}

.pills{margin-top: 16px; display:flex; flex-wrap:wrap; gap:10px;}
.pill{
  padding: 7px 10px;
  border-radius: 999px;
  border:1px solid var(--border);
  background: rgba(255,255,255,.65);
  color: rgba(43,35,81,.78);
  font-size: 14px;
}

/* Right-side links -> looks like event CTA list */
.hero-links{display:flex; flex-direction:column; gap:10px}
.hero-links > a{
  display:block;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.88);
  box-shadow: var(--shadow-2);
  color: var(--ink);
}
.hero-links > a:hover{
  transform: translateY(-1px);
  transition: transform .12s ease;
  text-decoration:none;
}
.hero-links > a span{
  display:block;
  color: var(--muted);
  font-size: 14px;
  margin-top: 2px;
}

.hero-links > a.meche-link{
  border: 1.5px solid var(--gold);
  box-shadow: 0 0 0 1px rgba(212,170,0,.18), var(--shadow-2);
}

/* Big Miku-ish CTA for Join */
.hero-links > a[href="join.html"]{
  border: none;
  color: #fff;
  background: linear-gradient(135deg, rgba(31,143,223,.98), rgba(73,101,225,.94));
  box-shadow: 0 16px 36px rgba(31,143,223,.22), 0 10px 26px rgba(73,101,225,.18);
}
.hero-links > a[href="join.html"]:hover{
  transform: translateY(-2px);
}
.hero-links > a[href="join.html"] span{
  color: rgba(255,255,255,.90);
}

.hero-affiliations{
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.94);
  box-shadow: var(--shadow-2);
}
.hero-affiliations strong{
  display:block;
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--ink);
}
.hero-affiliations p{
  margin:0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--muted);
}

/* Sections */
.section{padding: 16px 0 36px;}
.section h2{
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -.2px;
}
.section p{
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.78;
}

/* Cards */
.grid-3{display:grid; grid-template-columns: repeat(3, 1fr); gap: 14px;}

.card{
  background: rgba(255,255,255,.90);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
  overflow:hidden;
}

.card .thumb{
  height: 150px;
  background:
    radial-gradient(720px 300px at 20% 18%, rgba(42,167,214,.30), transparent 60%),
    radial-gradient(620px 260px at 88% 26%, rgba(217,112,179,.12), transparent 62%),
    linear-gradient(135deg, rgba(127,195,255,.12), rgba(43,35,81,.02));
  border-bottom: 1px solid var(--border-2);
}

.card .thumb-photo{
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
  object-position: center 20%;
  border-bottom: 1px solid var(--border-2);
}

/* Team page: enforce square headshots/placeholders for current members */
.current-members-grid{
  grid-template-columns: repeat(auto-fit, minmax(180px, 220px));
  justify-content: center;
  gap: 12px;
}

.current-members-grid .card{
  width: 100%;
}

.current-members-grid .card .thumb,
.current-members-grid .card .thumb-photo{
  width: 100%;
  aspect-ratio: 1 / 1;
  height: auto;
}

.current-members-grid .card .thumb{
  background-size: cover;
  background-position: center;
}

.card .body{padding: 14px 16px;}
.card h3{margin:0 0 6px; font-size: 16px; font-weight: 600; color: var(--ink);}
.card p{margin:0; color: var(--muted); font-size: 15px; line-height: 1.68;}
.card a.more{
  display:inline-block;
  margin-top: 10px;
  font-size: 15px;
  color: var(--gold);
}

.member-links{
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 8px;
}

.member-links .more{
  margin-top: 0;
}

/* Home carousel: rolling impression images with text overlays */
.impression-carousel{
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: rgba(255,255,255,.86);
  overflow: hidden;
}

.impression-viewport{
  overflow: hidden;
}

.impression-track{
  display: flex;
  transition: transform .55s cubic-bezier(.22,.61,.36,1);
}

.impression-slide{
  min-width: 100%;
  position: relative;
  aspect-ratio: 16 / 9;
}

.impression-slide img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.impression-overlay{
  position: absolute;
  inset: auto 0 0 0;
  padding: 18px 20px;
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.66) 72%);
  color: #fff;
}

.impression-overlay h3{
  margin: 0 0 4px;
  font-size: 21px;
  font-weight: 600;
  color: #fff;
}

.impression-overlay p{
  margin: 0;
  color: rgba(255,255,255,.90);
  line-height: 1.5;
  font-size: 16px;
}

.carousel-btn{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 4;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.32);
  background: rgba(17,19,24,.44);
  color: #fff;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

.carousel-btn:hover{
  background: rgba(17,19,24,.62);
}

.carousel-btn.prev{left: 12px;}
.carousel-btn.next{right: 12px;}

.carousel-dots{
  position: absolute;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 4;
}

.carousel-dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.7);
  background: rgba(255,255,255,.25);
}

.carousel-dot.active{
  background: var(--gold-2);
  border-color: var(--gold-2);
}

/* Research page: vertical project stream layout */
.research-layout{
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.research-index{
  position: sticky;
  top: 92px;
}

.research-index-top{
  position: static;
  top: auto;
  max-width: 760px;
  margin: 0 0 8px;
}

.research-index .body{
  padding: 16px;
}

.research-index h3{
  margin: 0 0 8px;
}

.research-stream{
  display: grid;
  gap: 16px;
}

.research-item{
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  align-items: start;
  gap: 0;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.research-item.reverse{
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
}

.research-item.reverse .research-media{
  order: 2;
}

.research-item.reverse .research-copy{
  order: 1;
}

.research-media{
  height: auto;
  min-height: 0;
  aspect-ratio: 3 / 3;
}

.research-media img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.research-media-carousel{
  height: 100%;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
}

.research-media-carousel .impression-viewport,
.research-media-carousel .impression-track,
.research-media-carousel .impression-slide{
  height: 100%;
}

.research-media-carousel .impression-slide{
  aspect-ratio: auto;
}

.research-media-carousel .carousel-btn{
  width: 34px;
  height: 34px;
  font-size: 21px;
}

.research-copy{
  padding: 18px 20px;
  display: grid;
  align-content: center;
}

.research-copy h2{
  margin: 0 0 10px;
  font-size: 26px;
  line-height: 1.2;
}

.research-copy p{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.related-publications{
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-2);
}

.related-publications h3{
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.related-publications ul{
  margin: 0;
  padding-left: 16px;
}

.related-publications li{
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
}

.related-publications .read-more-link{
  display: inline-block;
  margin-top: 8px;
  color: #8b1e2d;
  font-weight: 700;
  letter-spacing: .01em;
}

.related-publications .read-more-link:hover{
  color: #a32738;
  text-decoration: none;
}

.extended-publications{
  display: grid;
  gap: 14px;
}

.extended-publications h3{
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.extended-publications ul{
  margin: 0;
  padding-left: 18px;
}

.extended-publications li{
  margin: 5px 0;
  color: var(--muted);
  line-height: 1.6;
}

.research-kicker{
  display: inline-block;
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
}

.research-title-card{
  margin-bottom: 8px;
}

.research-quicklinks{
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.research-quicklinks a{
  display: inline-block;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.72);
  color: var(--ink);
  font-size: 15px;
  text-decoration: none;
}

.research-quicklinks a:hover{
  border-color: rgba(31,143,223,.35);
  box-shadow: 0 8px 18px rgba(31,143,223,.08);
}

/* Lists */
.list{
  background: rgba(255,255,255,.92);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-2);
  padding: 14px 16px;
}
.list-item{
  padding: 10px 0;
  border-top: 1px solid rgba(17,19,24,.08);
}
.list-item:first-child{border-top:none;}
.date{color: var(--gold); font-weight:800; font-size: 12px; letter-spacing:.2px;}
.small{color: var(--muted); font-size: 15px; line-height: 1.7;}

.deep-red-note{
  color: #8b1e2d;
}

/* Footer */
.footer{
  border-top: 1px solid var(--border);
  padding: 18px 0 30px;
  color: rgba(17,19,24,.60);
  font-size: 15px;
  background: rgba(255,255,255,.65);
}
.footer .row{
  display:flex; flex-wrap:wrap; gap:12px;
  align-items:center; justify-content:space-between;
}
.footer a{color: rgba(17,19,24,.60)}
.footer a:hover{color: var(--ink); text-decoration:none}

/* Responsive */
@media (max-width: 860px){
  .hero-grid{grid-template-columns: 1fr;}
  h1{font-size: 34px;}
  .grid-3:not(.current-members-grid){grid-template-columns: 1fr;}
  .current-members-grid{
    grid-template-columns: repeat(auto-fit, minmax(160px, 220px));
    justify-content: center;
  }
  .nav-inner{align-items:flex-start;}
  .logo{width:46px; height:46px;}
  .brand strong{font-size: 21px;}
  .menu-toggle{
    display: inline-flex;
  }
  .menu{
    display: none;
  }
  .mobile-menu-panel{
    display: none;
    top: 84px;
    right: 18px;
    left: auto;
    width: min(320px, calc(100vw - 36px));
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: #ffffff;
    box-shadow: 0 22px 48px rgba(17,19,24,.20);
  }
  .mobile-menu-panel.open{
    display: block;
  }
  .mobile-menu-panel .menu{
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }
  .mobile-menu-panel .menu a{
    font-size: 16px;
    padding: 11px 14px;
    border-radius: 14px;
    background: #ffffff;
  }
  .nav-right{
    width: auto;
    margin-left: auto;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 10px;
  }
  .nav-right.menu-open .menu{
    display: none;
  }
  .mit-wordmark img{
    height: 28px;
  }
  .mit-wordmark{
    display: none;
  }

  .impression-slide{
    aspect-ratio: 4 / 3;
  }

  .impression-overlay{
    padding: 14px 14px 16px;
  }

  .impression-overlay h3{
    font-size: 17px;
  }

  .impression-overlay p{
    font-size: 13px;
  }

  .carousel-btn{
    width: 34px;
    height: 34px;
    font-size: 21px;
  }

  .research-layout{
    grid-template-columns: 1fr;
  }

  .research-index{
    position: static;
  }

  .research-item,
  .research-item.reverse{
    grid-template-columns: 1fr;
  }

  .research-item.reverse .research-media,
  .research-item.reverse .research-copy{
    order: initial;
  }

  .research-media{
    min-height: 0;
    height: auto;
    aspect-ratio: 4 / 3;
  }

  .research-copy h2{
    font-size: 22px;
  }

  .research-quicklinks{
    gap: 6px;
  }
}
/* === Miku-style stage lighting overlay === */
.stage-light{
  position: fixed;
  inset: -20%;
  pointer-events: none;
  z-index: 0;

  background:
    radial-gradient(980px 560px at 14% 20%, rgba(31,143,223,.42), transparent 62%),
    radial-gradient(840px 520px at 84% 14%, rgba(154,185,255,.30), transparent 64%),
    radial-gradient(640px 430px at 70% 76%, rgba(127,195,255,.30), transparent 66%);

  filter: blur(34px);
  opacity: .98;
}


/* Make all content above the light layer */
body > *:not(.stage-light){
  position: relative;
  z-index: 1;
}

body > .mobile-menu-panel{
  position: fixed !important;
  z-index: 99999 !important;
}

body{
  position: relative;
}

/* === 1) Gradient title text (Miku vibe) === */
h1{
  background: linear-gradient(90deg, rgba(43,35,81,1) 0%, rgba(43,35,81,1) 55%, rgba(42,167,214,.95) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* === 2) Card hover lift + glow === */
.card, .hero-card, .list, .hero-links > a{
  transition: transform .16s ease, box-shadow .16s ease, border-color .16s ease;
}

.card:hover{
  transform: translateY(-3px);
  box-shadow: 0 18px 40px rgba(17,19,24,.12);
  border-color: rgba(51,198,198,.22);
}

.hero-links > a:hover{
  border-color: rgba(42,167,214,.24);
  box-shadow: 0 14px 34px rgba(42,167,214,.10), 0 10px 26px rgba(127,195,255,.08);
}

/* === 3) Nav: neon outline on hover/active === */
.menu a{
  position: relative;
}

.menu a.active{
  background: rgba(17,19,24,.03);
  border-color: rgba(17,19,24,.10);
}

.menu a:hover{
  border-color: rgba(51,198,198,.22);
  box-shadow: 0 10px 22px rgba(51,198,198,.10);
}

/* === 4) Subtle moving stage light === */
@keyframes driftLight{
  0%   { transform: translate3d(0,0,0) scale(1); }
  25%  { transform: translate3d(-2.5%, 1.2%, 0) scale(1.03); }
  50%  { transform: translate3d(-4%, 2%, 0) scale(1.05); }
  75%  { transform: translate3d(-1.5%, .8%, 0) scale(1.02); }
  100% { transform: translate3d(0,0,0) scale(1); }
}
.stage-light{
  animation: none;
}

@keyframes glowPulse{
  0%, 100% { opacity: .78; filter: blur(38px); }
  50% { opacity: .96; filter: blur(46px); }
}

@keyframes twinkleField{
  0%, 100% { opacity: .38; }
  50% { opacity: .58; }
}

@keyframes starDrift{
  from { transform: translate3d(0,0,0); }
  to { transform: translate3d(-44px, 26px, 0); }
}

@media (prefers-reduced-motion: reduce){
  .stage-light,
  body:before,
  body:after{
    animation: none !important;
  }
}

/* Optional: glossy highlight on the main CTA */
.hero-links > a[href="join.html"]{
  position: relative;
  overflow: hidden;
}
.hero-links > a[href="join.html"]::after{
  content:"";
  position:absolute;
  top:-60%;
  left:-30%;
  width: 60%;
  height: 220%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
  transform: rotate(18deg);
  opacity: .55;
}
.hero-links > a[href="join.html"]:hover::after{
  animation: shine 0.9s ease forwards;
}
@keyframes shine{
  from{ transform: translateX(-40%) rotate(18deg); }
  to{ transform: translateX(180%) rotate(18deg); }
}