/* ===========================================================
   Badrikanath Praharaj — dark robotics theme
   Hand-built, no framework. Subtle micro-interactions only.
   =========================================================== */

:root{
  --bg:        #0a0d13;   /* near-black, blue-tinted */
  --bg-alt:    #0d121b;   /* alternating sections */
  --panel:     #121925;   /* cards */
  --panel-2:   #161f2e;
  --line:      #232d3d;   /* hairlines */
  --line-soft: #1b2433;
  --text:      #e8ecf3;   /* primary */
  --muted:     #9aa6b8;   /* secondary */
  --dim:       #8b95a6;   /* tertiary (contrast-tuned for dark bg) */
  --accent:    #5b9dff;   /* electric blue */
  --accent-2:  #38e0c8;   /* cyan highlight */
  --accent-dim:#16243d;
  --silver:    #cdd5e0;
  --radius:    14px;
  --maxw:      1100px;
  --ease:      cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  font-size:17px;
}
a{color:var(--accent);text-decoration:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:5px;}
.lightbox:focus-visible{outline:none;}
img,video{max-width:100%;display:block;}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
strong{font-weight:600;color:#f2f5fa;}
em{font-style:italic;color:var(--silver);}
.muted{color:var(--dim);}
.note{margin-top:26px;color:var(--muted);font-size:15px;}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:60;
  background:rgba(10,13,19,.72);
  backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease), background .3s var(--ease);
}
.nav.scrolled{border-bottom-color:var(--line);background:rgba(10,13,19,.9);}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px;}
.nav-brand{color:var(--text);font-weight:600;letter-spacing:-.01em;}
.nav-links{display:flex;gap:26px;align-items:center;}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;transition:color .2s var(--ease),transform .2s var(--ease);}
.nav-links a:hover{color:var(--text);transform:translateY(-1px);}
.nav-cv{border:1px solid var(--line);padding:6px 15px;border-radius:999px;color:var(--text)!important;}
.nav-cv:hover{border-color:var(--accent);color:var(--accent)!important;box-shadow:0 0 0 3px var(--accent-dim);}
.nav-toggle{display:none;background:none;border:none;font-size:22px;cursor:pointer;color:var(--text);}

/* ---------- HERO ---------- */
.hero{position:relative;padding:90px 0 64px;overflow:hidden;}
.grid-glow{
  position:absolute;inset:0;pointer-events:none;opacity:.55;
  background:
    radial-gradient(620px 360px at 78% 8%, rgba(91,157,255,.16), transparent 70%),
    radial-gradient(520px 420px at 8% 30%, rgba(56,224,200,.07), transparent 70%),
    linear-gradient(rgba(35,45,61,.35) 1px, transparent 1px) 0 0/100% 46px,
    linear-gradient(90deg, rgba(35,45,61,.35) 1px, transparent 1px) 0 0/46px 100%;
  -webkit-mask-image:linear-gradient(to bottom, #000 0%, transparent 85%);
  mask-image:linear-gradient(to bottom, #000 0%, transparent 85%);
}
.hero-inner{position:relative;display:grid;grid-template-columns:1fr 240px;gap:54px;align-items:center;}
.hero-eyebrow{
  font-family:'JetBrains Mono',monospace;font-size:13px;letter-spacing:.04em;
  color:var(--accent);margin:0 0 14px;text-transform:uppercase;
}
.hero-name{
  font-family:'Newsreader',Georgia,serif;
  font-size:clamp(40px,6.4vw,64px);line-height:1.01;font-weight:500;letter-spacing:-.02em;margin:0 0 12px;
  color:#fff;
}
.hero-tagline{font-size:clamp(19px,2.4vw,24px);color:var(--silver);font-weight:500;margin:0 0 14px;}
.hero-edge{font-size:15.5px;color:var(--text);margin:0 0 20px;padding-left:14px;border-left:2px solid var(--accent);max-width:60ch;}
.hero-statement{font-size:18px;color:var(--muted);max-width:62ch;margin:0 0 26px;}
.hero-links{display:flex;flex-wrap:wrap;gap:10px;}
.chip{
  border:1px solid var(--line);border-radius:999px;padding:9px 18px;
  font-size:14.5px;font-weight:500;color:var(--text);background:rgba(255,255,255,.015);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease),color .2s var(--ease);
}
.chip:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim);}
.chip-solid{background:var(--accent);color:#06101f;border-color:var(--accent);font-weight:600;}
.chip-solid:hover{background:#7fb2ff;color:#06101f;}
.hero-photo img{
  width:240px;height:240px;object-fit:cover;border-radius:20px;
  border:1px solid var(--line);
  box-shadow:0 24px 60px rgba(0,0,0,.5), 0 0 0 1px rgba(91,157,255,.08);
  transition:transform .4s var(--ease),box-shadow .4s var(--ease);
}
.hero-photo img:hover{transform:scale(1.03);box-shadow:0 30px 70px rgba(0,0,0,.55), 0 0 0 1px rgba(91,157,255,.35);}

/* ---------- STRIP / NOW ---------- */
.strip{padding:6px 0 4px;}
.kicker{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;text-transform:uppercase;letter-spacing:.16em;
  color:var(--accent);font-weight:500;margin:0 0 14px;
}
.news-list{list-style:none;margin:0;padding:0;border-top:1px solid var(--line);}
.news-list li{
  padding:14px 0;border-bottom:1px solid var(--line-soft);
  color:var(--muted);display:flex;gap:18px;font-size:16px;
}
.news-date{color:var(--accent);font-weight:600;min-width:46px;font-variant-numeric:tabular-nums;font-family:'JetBrains Mono',monospace;font-size:14px;}

/* ---------- SECTIONS ---------- */
.section{padding:78px 0;}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);}
.section-title{
  font-family:'Newsreader',Georgia,serif;
  font-size:clamp(28px,3.6vw,38px);font-weight:500;letter-spacing:-.01em;margin:0 0 8px;color:#fff;
}
.section-sub{color:var(--muted);max-width:64ch;margin:0 0 40px;font-size:17px;}

/* ---------- FEATURED CARDS ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--panel);
  display:flex;flex-direction:column;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.card:hover{transform:translateY(-5px);box-shadow:0 26px 50px rgba(0,0,0,.45);border-color:#33405a;}
.card-media{display:block;overflow:hidden;background:#05080d;aspect-ratio:16/10;}
.card-media img,.card-media video{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.card:hover .card-media img,.card:hover .card-media video{transform:scale(1.07);}
.card-body{padding:20px;display:flex;flex-direction:column;gap:9px;}
.card-tags{display:flex;flex-wrap:wrap;gap:6px;}
.tag{font-size:11px;font-weight:600;letter-spacing:.03em;color:var(--accent);background:var(--accent-dim);padding:3px 9px;border-radius:6px;font-family:'JetBrains Mono',monospace;text-transform:uppercase;}
.card-body h3{font-size:19px;margin:2px 0 0;line-height:1.25;letter-spacing:-.01em;color:#fff;}
.card-body p{margin:0;font-size:15px;color:var(--muted);}
.card-links{margin-top:auto;padding-top:6px;}
.card-links a{font-size:14.5px;font-weight:600;}
.card-links a:hover{color:var(--accent-2);}

/* ---------- PUBLICATIONS ---------- */
.pubs{display:flex;flex-direction:column;gap:18px;}
.pub{
  display:grid;grid-template-columns:124px 1fr;gap:24px;align-items:start;
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.pub:hover{transform:translateY(-3px);box-shadow:0 22px 44px rgba(0,0,0,.4);border-color:#33405a;}
.pub-thumb{display:block;overflow:hidden;border-radius:9px;border:1px solid var(--line);background:#05080d;aspect-ratio:3/4;}
.pub-thumb img{width:100%;height:100%;object-fit:cover;object-position:top;transition:transform .5s var(--ease);filter:saturate(.96);}
.pub:hover .pub-thumb img{transform:scale(1.05);}
.pub-body h3{font-size:18.5px;margin:0 0 6px;line-height:1.32;letter-spacing:-.01em;color:#fff;}
.pub-venue{font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--accent);font-weight:500;margin:0 0 12px;}
.pub-hook{font-size:15.5px;color:var(--silver);font-weight:500;margin:0 0 10px;line-height:1.5;}
.next-note{border-left:2px solid var(--accent-2);padding-left:14px;color:var(--text);}
.next-note strong{color:var(--accent-2);}
.pub-abstract{font-size:14.5px;color:var(--muted);margin:0 0 14px;line-height:1.65;}
.pub-links{display:flex;gap:8px;flex-wrap:wrap;}
.pub-links a{
  font-size:13px;font-weight:600;border:1px solid var(--line);border-radius:7px;padding:5px 13px;color:var(--text);
  transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease),box-shadow .2s var(--ease);
}
.pub-links a:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent);box-shadow:0 0 0 3px var(--accent-dim);}

/* ---------- OTHER PUBLICATIONS ---------- */
.subhead{font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:var(--silver);margin:34px 0 14px;font-family:'JetBrains Mono',monospace;font-weight:500;}
.other-pubs{list-style:none;margin:0;padding:0;border-top:1px solid var(--line-soft);}
.other-pubs li{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px;padding:14px 0;border-bottom:1px solid var(--line-soft);}
.op-title{color:var(--text);font-weight:500;font-size:16px;flex:1 1 60%;}
.op-meta{color:var(--dim);font-size:13px;font-family:'JetBrains Mono',monospace;}
.op-link{font-size:13px;font-weight:600;color:var(--accent);}
.op-link:hover{color:var(--accent-2);}

/* ---------- PROJECTS ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.proj{
  border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.proj:hover{transform:translateY(-4px);box-shadow:0 22px 44px rgba(0,0,0,.4);border-color:#33405a;}
.proj-wide{grid-column:1/-1;background:linear-gradient(120deg,var(--panel),var(--panel-2));}
.proj-body{padding:22px;display:flex;flex-direction:column;gap:8px;}
.proj-body h3{font-size:18.5px;margin:0;letter-spacing:-.01em;color:#fff;}
.proj-meta{font-family:'JetBrains Mono',monospace;font-size:12.5px;color:var(--accent-2);margin:0;}
.proj-body p{margin:0;font-size:15px;color:var(--muted);}
.proj-media{overflow:hidden;aspect-ratio:16/10;background:#05080d;}
.proj-media img,.proj-media video{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
.proj:hover .proj-media img,.proj:hover .proj-media video{transform:scale(1.06);}

/* ---------- TIMELINE ---------- */
.timeline{display:flex;flex-direction:column;}
.tl-item{padding:24px 0;border-bottom:1px solid var(--line-soft);}
.tl-item:last-child{border-bottom:none;}
.tl-head{display:flex;justify-content:space-between;align-items:baseline;gap:16px;flex-wrap:wrap;margin-bottom:7px;}
.tl-head h3{font-size:19px;margin:0;letter-spacing:-.01em;color:#fff;}
.tl-date{color:var(--dim);font-size:13.5px;font-weight:500;white-space:nowrap;font-family:'JetBrains Mono',monospace;}
.tl-item p{margin:0;color:var(--muted);font-size:16px;}

/* ---------- TWO-COL (skills+edu, service) ---------- */
.two-col{display:grid;grid-template-columns:1.3fr 1fr;gap:54px;align-items:start;}
.two-col-wide{grid-template-columns:1fr 1fr;}
.skills-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px 28px;}
.skill-col h4{font-family:'JetBrains Mono',monospace;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--dim);margin:0 0 10px;}
.skill-col ul{list-style:none;margin:0;padding:0;}
.skill-col li{padding:6px 0;border-bottom:1px solid var(--line-soft);font-size:15px;color:var(--text);}
.skill-col li:last-child{border-bottom:none;}
.edu-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;}
.edu-card h3{margin:0 0 4px;font-size:18px;color:#fff;}
.edu-deg{margin:0 0 4px;color:var(--text);font-size:15.5px;}
.edu-meta{margin:0 0 14px;color:var(--muted);font-size:14.5px;}
.edu-points{margin:0;padding-left:18px;color:var(--muted);font-size:15px;}
.edu-points li{margin-bottom:8px;}

/* ---------- ACHIEVEMENTS / SERVICE ---------- */
.ach-list{list-style:none;margin:0;padding:0;}
.ach-list li{padding:13px 0;border-bottom:1px solid var(--line-soft);color:var(--muted);font-size:16px;}
.ach-list li:last-child{border-bottom:none;}
.service-photos{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.service-photos img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px;border:1px solid var(--line);transition:transform .4s var(--ease);}
.service-photos img:hover{transform:scale(1.02);}

/* ---------- BEYOND ---------- */
.beyond-feature{
  display:grid;grid-template-columns:1.4fr 1fr;gap:0;align-items:stretch;
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin-bottom:40px;background:var(--panel);
}
.beyond-feature img{width:100%;height:100%;min-height:300px;object-fit:cover;transition:transform .6s var(--ease);}
.beyond-feature:hover img{transform:scale(1.04);}
.beyond-text{padding:30px;display:flex;flex-direction:column;justify-content:center;gap:8px;}
.beyond-text h3{margin:0;font-size:21px;color:#fff;font-family:'Newsreader',serif;font-weight:500;}
.beyond-text p{margin:0;color:var(--muted);font-size:16px;}
.gallery-title{font-family:'Newsreader',serif;font-weight:500;font-size:22px;color:#fff;margin:0 0 18px;}
.gallery{columns:4;column-gap:12px;}
.gallery img{
  width:100%;margin:0 0 12px;border-radius:10px;border:1px solid var(--line);
  cursor:zoom-in;break-inside:avoid;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),border-color .35s var(--ease);
}
.gallery img:hover{transform:scale(1.03);box-shadow:0 14px 30px rgba(0,0,0,.45);border-color:#33405a;}

/* ---------- LIGHTBOX ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;
  background:rgba(5,7,11,.92);backdrop-filter:blur(4px);padding:30px;cursor:zoom-out;
}
.lightbox.open{display:flex;}
.lightbox img{max-width:92vw;max-height:90vh;border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.7);}

/* ---------- FOOTER ---------- */
.footer{background:#070a0f;border-top:1px solid var(--line);padding:62px 0 26px;}
.footer-inner{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;align-items:flex-start;}
.footer-name{font-family:'Newsreader',serif;font-size:clamp(23px,3vw,31px);font-weight:500;margin:0 0 8px;max-width:18ch;line-height:1.15;color:#fff;}
.footer-sub{color:var(--muted);margin:0;}
.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-end;}
.footer-links a{color:var(--muted);font-weight:500;transition:color .2s var(--ease),transform .2s var(--ease);}
.footer-links a:hover{color:var(--accent);transform:translateX(-2px);}
.footer-copy{color:var(--dim);font-size:13px;text-align:center;margin:48px 0 0;font-family:'JetBrains Mono',monospace;}

/* ---------- STATS BAND ---------- */
.stats-band{padding:10px 0 2px;}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;}
.stat{display:flex;flex-direction:column;gap:4px;}
.stat-n{font-family:'Newsreader',serif;font-size:34px;font-weight:500;color:#fff;line-height:1;}
.stat-l{font-size:13px;color:var(--muted);line-height:1.35;}

/* ---------- ABOUT BAND ---------- */
.about-band{padding:34px 0 10px;}
.about-para{font-size:18px;color:var(--muted);max-width:74ch;margin:8px 0 0;line-height:1.7;}

/* ---------- DEMO CHIP ---------- */
.demo-soon{
  font-size:12.5px;font-weight:600;border:1px dashed var(--line);border-radius:7px;padding:5px 12px;
  color:var(--dim);font-family:'JetBrains Mono',monospace;letter-spacing:.02em;
}

/* ---------- TIMELINE MEDIA ---------- */
.tl-links{margin-top:12px;}
.tl-links a{font-size:13px;font-weight:600;border:1px solid var(--line);border-radius:7px;padding:5px 13px;color:var(--text);transition:transform .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);}
.tl-links a:hover{transform:translateY(-2px);border-color:var(--accent);color:var(--accent);}
.tl-media{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px;}
.tl-media figure{margin:0;}
.tl-media video{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:10px;border:1px solid var(--line);background:#05080d;}
.tl-media figcaption{font-size:12.5px;color:var(--dim);margin-top:6px;font-family:'JetBrains Mono',monospace;}

/* ---------- REVEAL ANIMATION ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .65s var(--ease),transform .65s var(--ease);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{scroll-behavior:auto;}
}

/* ---------- RESPONSIVE ---------- */
@media (max-width:920px){
  .cards{grid-template-columns:1fr;}
  .two-col,.two-col-wide{grid-template-columns:1fr;gap:38px;}
  .skills-grid{grid-template-columns:repeat(2,1fr);}
  .hero-inner{grid-template-columns:1fr;gap:30px;}
  .hero-photo{order:-1;}
  .hero-photo img{width:150px;height:150px;}
  .proj-grid{grid-template-columns:1fr;}
  .beyond-feature{grid-template-columns:1fr;}
  .gallery{columns:3;}
  .nav-links{
    position:fixed;top:64px;left:0;right:0;background:var(--bg-alt);border-bottom:1px solid var(--line);
    flex-direction:column;gap:0;padding:8px 0;display:none;box-shadow:0 16px 30px rgba(0,0,0,.5);
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 28px;width:100%;}
  .nav-toggle{display:block;}
  .pub{grid-template-columns:84px 1fr;gap:16px;}
  .stats{grid-template-columns:repeat(2,1fr);gap:22px 18px;}
  .tl-media{grid-template-columns:1fr;}
}
@media (max-width:520px){
  body{font-size:16px;}
  .wrap{padding:0 20px;}
  .footer-links{align-items:flex-start;}
  .gallery{columns:2;}
  .service-photos{grid-template-columns:1fr;}
}