/* ============================================================
   SHARED THEME — Ashwani Pandey Portfolio
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,600;9..144,700;9..144,800&family=Manrope:wght@300;400;500;600&family=JetBrains+Mono:wght@400;500&family=Great+Vibes&display=swap');

:root {
  --bg:      #080c14;
  --bg2:     #0d1421;
  --bg3:     #111927;
  --accent:  #4fc3f7;
  --accent2: #e040fb;
  --gold:    #ffd54f;
  --text:    #e8edf5;
  --muted:   #7a8aa0;
  --border:  rgba(79,195,247,0.15);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Manrope', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  line-height: 1.7;
}

/* Stars background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 10% 20%,  rgba(255,255,255,0.55) 0%, transparent 100%),
    radial-gradient(1px 1px at 30% 70%,  rgba(255,255,255,0.35) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 50% 10%, rgba(255,255,255,0.45) 0%, transparent 100%),
    radial-gradient(1px 1px at 70% 50%,  rgba(255,255,255,0.28) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 85%,  rgba(255,255,255,0.45) 0%, transparent 100%),
    radial-gradient(1px 1px at 20% 90%,  rgba(255,255,255,0.38) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 60% 35%, rgba(255,255,255,0.28) 0%, transparent 100%),
    radial-gradient(1px 1px at 92% 15%,  rgba(255,255,255,0.45) 0%, transparent 100%),
    radial-gradient(1px 1px at 43% 58%,  rgba(255,255,255,0.30) 0%, transparent 100%),
    radial-gradient(2px 2px at 76% 28%,  rgba(79,195,247,0.35) 0%, transparent 100%),
    radial-gradient(1px 1px at 5%  45%,  rgba(255,255,255,0.38) 0%, transparent 100%),
    radial-gradient(1px 1px at 38% 82%,  rgba(255,255,255,0.28) 0%, transparent 100%),
    radial-gradient(2px 2px at 55% 65%,  rgba(224,64,251,0.25) 0%, transparent 100%),
    radial-gradient(1px 1px at 18% 55%,  rgba(255,255,255,0.40) 0%, transparent 100%),
    radial-gradient(1px 1px at 90% 70%,  rgba(255,255,255,0.30) 0%, transparent 100%);
  pointer-events: none;
  z-index: 0;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 3rem;
  background: rgba(8,12,20,0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s;
}
.nav-logo {
  font-family: 'Fraunces', sans-serif;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: -0.02em;
}
.nav-links {
  display: flex;
  gap: 2.2rem;
  list-style: none;
}
.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ── SHARED SECTION STYLES ── */
.page-hero {
  position: relative;
  z-index: 1;
  padding: 7rem 3rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
}
.section-inner {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem;
}
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 28px; height: 1px;
  background: var(--accent);
}
h1, h2, h3 {
  font-family: 'Fraunces', sans-serif;
  letter-spacing: -0.02em;
}
.page-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1.1;
}
.page-title span { color: var(--accent); }
.page-subtitle {
  color: var(--muted);
  font-size: 1rem;
  font-weight: 300;
  margin-bottom: 2.5rem;
}

/* ── CARDS ── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem;
  transition: border-color 0.2s, transform 0.2s;
}
.card:hover {
  border-color: rgba(79,195,247,0.35);
  transform: translateY(-3px);
}

/* ── DIVIDER ── */
.section-divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border), transparent);
  margin: 0;
  position: relative;
  z-index: 1;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: 6px;
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: 'Manrope', sans-serif;
}
.btn-primary { background: var(--accent); color: #080c14; }
.btn-primary:hover { background: #81d4fa; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,195,247,0.3); }
.btn-outline { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }

/* ── TAGS ── */
.tag {
  background: rgba(79,195,247,0.07);
  border: 1px solid rgba(79,195,247,0.15);
  color: #b0d4e4;
  font-size: 0.75rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
}

/* ── FOOTER ── */
footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 1.8rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--muted);
  font-family: 'JetBrains Mono', monospace;
}
footer a { color: var(--accent); text-decoration: none; }

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  nav { padding: 0.9rem 1.5rem; }
  .nav-links { display: none; flex-direction: column; position: fixed; top: 56px; left: 0; right: 0; background: rgba(8,12,20,0.97); padding: 1.5rem; gap: 1.2rem; border-bottom: 1px solid var(--border); }
  .nav-links.open { display: flex; }
  .nav-hamburger { display: flex; }
  .page-hero { padding: 6rem 1.5rem 2rem; }
  .section-inner { padding: 2rem 1.5rem; }
}


/* ============================================================
   ASTRONOMY UPGRADE
   ============================================================ */
h1,h2,h3{font-weight:700}
body{font-weight:400;letter-spacing:.005em}
.galaxy-canvas{position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.9}
#home::after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:linear-gradient(90deg,rgba(8,12,20,.88) 0%,rgba(8,12,20,.4) 55%,rgba(8,12,20,.1) 100%)}
.fx-sky{position:fixed;inset:0;z-index:0;pointer-events:none}
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:200;background:linear-gradient(90deg,var(--accent),var(--accent2),var(--gold))}
h1.hero-name{background:linear-gradient(120deg,#fff 0%,#cfe9ff 40%,#fff 80%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-title-accent{background-size:200% 200%!important;animation:shimmer 7s ease-in-out infinite}
@keyframes shimmer{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.page-title span{background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.reveal{transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.about-grid>.reveal:nth-child(2n),.kr-grid>.reveal:nth-child(3n+2){transition-delay:.1s}
.kr-grid>.reveal:nth-child(3n){transition-delay:.2s}
.about-card,.skill-card,.research-card,.kr-card,.achievement-card,.pub-item{position:relative;overflow:hidden}
.about-card::after,.skill-card::after,.research-card::after,.kr-card::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .3s;background:radial-gradient(260px circle at var(--mx,50%) var(--my,50%),rgba(79,195,247,.13),transparent 60%)}
.about-card:hover::after,.skill-card:hover::after,.research-card:hover::after,.kr-card:hover::after{opacity:1}
.nav-links a{position:relative}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;height:1px;width:0;background:var(--accent);transition:width .3s}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.timeline-item::before{animation:blink 3s ease-in-out infinite}

/* Key results */
.kr-h{font-size:1.6rem;margin-bottom:1.6rem}
.kr-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.2rem}
.kr-card{display:flex;flex-direction:column;gap:.6rem;background:var(--bg2);border:1px solid var(--border);border-radius:12px;padding:1.5rem;text-decoration:none;color:inherit;transition:border-color .25s,transform .25s,box-shadow .25s}
.kr-card:hover{border-color:rgba(79,195,247,.45);transform:translateY(-5px);box-shadow:0 14px 40px rgba(0,0,0,.35)}
.kr-tag{align-self:flex-start;font-family:'JetBrains Mono',monospace;font-size:.66rem;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);border:1px solid rgba(255,213,79,.25);background:rgba(255,213,79,.06);padding:.15rem .55rem;border-radius:4px}
.kr-card h4{font-family:'Fraunces',serif;font-size:1.02rem;line-height:1.4;font-weight:600}
.kr-meta{font-family:'JetBrains Mono',monospace;font-size:.7rem;color:var(--muted)}
.kr-go{margin-top:auto;font-size:.8rem;color:var(--accent);transition:transform .25s}
.kr-card:hover .kr-go{transform:translateX(4px)}

/* Paper pages */
.paper-hero{padding-bottom:1rem}
.back-link{display:inline-block;color:var(--muted);text-decoration:none;font-size:.85rem;margin-bottom:1.2rem;transition:color .2s}
.back-link:hover{color:var(--accent)}
.paper-title{font-size:clamp(1.6rem,3.2vw,2.5rem);line-height:1.2;font-weight:700;margin:.3rem 0 1rem}
.paper-authors{color:#9aacba;font-size:.92rem}.paper-authors strong{color:var(--accent)}
.paper-journal{font-family:'JetBrains Mono',monospace;font-size:.78rem;color:var(--muted);margin:.4rem 0 1.4rem}
.paper-body{padding-top:1rem}
.paper-abstract{background:var(--bg2);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:10px;padding:1.8rem 2rem;margin-bottom:2rem}
.paper-abstract h3{font-size:.8rem;font-family:'JetBrains Mono',monospace;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:.8rem}
.paper-abstract p{color:#b0bec8;line-height:1.9;font-size:.98rem}
.abs-pending{color:var(--muted)!important;font-style:italic}
.paper-fig{margin:2rem 0;text-align:center}
.paper-fig img{max-width:100%;border-radius:10px;border:1px solid var(--border);background:#fff}
.paper-fig figcaption{font-size:.78rem;color:var(--muted);margin-top:.7rem;font-style:italic}
.paper-fig.nofig{display:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}


/* Hero background: black-hole illustration; black sky blended away with "screen" */
.hero-bg{position:absolute;left:62%;top:50%;width:min(125vw,1800px);aspect-ratio:2200/1466;z-index:0;pointer-events:none;background:url('images/black-hole.jpg') center/contain no-repeat;mix-blend-mode:screen;opacity:.95;will-change:transform,filter;transform:translate(-50%,-50%);animation:bgdrift 45s ease-in-out infinite alternate,bgglow 7s ease-in-out infinite alternate}
@keyframes bgdrift{from{transform:translate(-50%,-50%) scale(1)}to{transform:translate(-50%,-50%) scale(1.09)}}
@keyframes bgglow{from{filter:brightness(.88)}to{filter:brightness(1.12)}}
@media (max-width:900px){.hero-bg{left:50%;width:190vw;opacity:.6}}
.hero-credit{position:absolute;right:1.2rem;bottom:.8rem;z-index:2;max-width:min(560px,90%);text-align:right;font-size:.66rem;line-height:1.5;color:var(--muted)}
.hero-credit a{color:#8fb3c9;text-decoration:underline;text-decoration-color:rgba(143,179,201,.35)}
.contact-grid{grid-template-columns:1fr 1.2fr!important}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr!important}}
.contact-desc{max-width:640px}

/* Key results list */
.kr-list{display:flex;flex-direction:column;gap:.7rem}
.kr-row{display:grid;grid-template-columns:1fr auto auto;gap:1.2rem;align-items:center;padding:1.05rem 1.4rem;background:var(--bg2);border:1px solid var(--border);border-radius:10px;text-decoration:none;color:var(--text);transition:border-color .25s,transform .25s,background .25s}
.kr-row:hover{border-color:rgba(79,195,247,.45);transform:translateX(5px);background:var(--bg3)}
.kr-t{font-family:'Fraunces',serif;font-size:1rem;font-weight:600;line-height:1.4}
.kr-j{font-family:'JetBrains Mono',monospace;font-size:.7rem;color:var(--muted);white-space:nowrap}
.kr-arrow{color:var(--accent);transition:transform .25s}
.kr-row:hover .kr-arrow{transform:translate(2px,-2px)}
@media (max-width:700px){.kr-row{grid-template-columns:1fr auto}.kr-j{grid-column:1/2;grid-row:2;white-space:normal}}

/* Contact form */
.email-link{color:var(--accent);text-decoration:none;border-bottom:1px solid rgba(79,195,247,.35);transition:border-color .2s}
.email-link:hover{border-color:var(--accent)}
.copy-btn{margin-left:.6rem;background:transparent;border:1px solid var(--border);color:var(--muted);border-radius:5px;font-size:.7rem;padding:.1rem .5rem;cursor:pointer;font-family:'JetBrains Mono',monospace;transition:all .2s}
.copy-btn:hover{color:var(--accent);border-color:var(--accent)}
.contact-form-wrap{background:var(--bg3);border:1px solid var(--border);border-radius:12px;padding:1.6rem}
#contact-form{display:flex;flex-direction:column;gap:1rem}
#contact-form label{display:flex;flex-direction:column;gap:.35rem;font-size:.78rem;color:var(--muted);font-family:'JetBrains Mono',monospace;letter-spacing:.05em;text-transform:uppercase}
#contact-form input[type=text],#contact-form input[type=email],#contact-form textarea{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:.7rem .9rem;color:var(--text);font:400 .92rem 'Manrope',sans-serif;text-transform:none;letter-spacing:0;transition:border-color .2s,box-shadow .2s;resize:vertical}
#contact-form input:focus,#contact-form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,195,247,.12)}
#contact-form .btn{align-self:flex-start}
.form-status{min-height:1.2em;font-size:.85rem;color:var(--muted)}
.form-status.ok{color:#81c784}.form-status.err{color:#ef9a9a}


/* Publication tabs */
.pub-tabs{display:flex;gap:.5rem;margin:1.6rem 0 1.4rem;overflow-x:auto;padding-bottom:.4rem;scrollbar-width:thin}
.pub-tab{flex:none;display:inline-flex;align-items:center;gap:.55rem;padding:.5rem 1.05rem;border-radius:999px;border:1px solid var(--border);background:transparent;color:var(--muted);font:500 .82rem 'Manrope',sans-serif;cursor:pointer;white-space:nowrap;transition:color .25s,border-color .25s,background .25s,box-shadow .25s}
.pub-tab:hover{color:var(--text);border-color:rgba(79,195,247,.4)}
.pub-tab.active{background:rgba(79,195,247,.12);border-color:var(--accent);color:var(--accent);box-shadow:0 0 18px rgba(79,195,247,.15)}
.pub-count{font:500 .68rem 'JetBrains Mono',monospace;opacity:.75;background:rgba(255,255,255,.06);padding:.05rem .45rem;border-radius:999px}
.pub-tab.active .pub-count{opacity:1;background:rgba(79,195,247,.18)}
.pub-item.pub-in{animation:pubIn .5s cubic-bezier(.2,.7,.2,1) both}
@keyframes pubIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.pub-empty{color:var(--muted);padding:2rem 1rem;text-align:center;font-style:italic}
.pub-badge{display:inline-block;margin-left:.5rem;font:500 .62rem 'JetBrains Mono',monospace;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);border:1px solid rgba(255,213,79,.3);padding:.05rem .45rem;border-radius:4px}