/* =========================================================================
   Nivas AI — shared design system
   Dark, premium aesthetic. DM Sans / Manrope, brand teal + orange accents.
   Extends the visual language of the Nandita Venkat portfolio so the whole
   site (corporate pages + leadership profiles) reads as one company.
   ========================================================================= */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&family=Manrope:wght@400;500;600;700&display=swap');

:root{
  /* Nivas AI brand palette (navy #0B3558 · blue #155A91 · teal #0A948C · orange #F58220),
     tuned for a dark theme. --cyan/--violet kept as token names but hold brand teal/orange. */
  --bg:#07101b; --surface:#0d1a2a; --surface2:#14263a;
  --ink:#f5f7fa; --muted:#9fb0c0; --faint:#7d8b99;
  --navy:#0B3558; --blue:#155A91;
  --cyan:#21c1b2; --violet:#F58220; --gold:#F58220;
  --line:rgba(255,255,255,.12); --line-soft:rgba(255,255,255,.07);
  --max:1240px; --radius:14px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"DM Sans",sans-serif;font-weight:300;line-height:1.65;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{font-family:Manrope,sans-serif;font-weight:500;letter-spacing:-.03em;line-height:1.08}
em{font-style:normal;color:var(--violet)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;z-index:100;top:10px;left:10px;transform:translateY(-150%);background:var(--ink);color:var(--bg);padding:.6rem 1rem;border-radius:6px}
.skip-link:focus{transform:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:4px;border-radius:2px}

/* ---- ambient blobs ---- */
.ambient{position:fixed;pointer-events:none;filter:blur(110px);opacity:.13;border-radius:50%;z-index:-1}
.ambient-a{width:520px;height:520px;background:var(--violet);top:-200px;right:-180px}
.ambient-b{width:440px;height:440px;background:var(--cyan);left:-260px;top:48vh}

/* ---- header / nav ---- */
.site-header{height:76px;position:fixed;z-index:50;top:0;left:0;width:100%;padding:0 max(24px,calc((100% - var(--max))/2));display:flex;align-items:center;justify-content:space-between;background:rgba(7,16,27,.72);backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:.3s}
.site-header.scrolled{border-color:var(--line)}
.brand{display:flex;gap:12px;align-items:center;font-weight:600;letter-spacing:.01em;font-family:Manrope}
.brand-mark{width:34px;height:34px;flex:none;background:url("/assets/brand/nivas-symbol.svg") center/contain no-repeat}
.brand-mark i{display:none}
.brand b{font-weight:600}.brand span.tld{color:var(--cyan)}
nav.primary{display:flex;gap:28px;align-items:center}
nav.primary a{font-size:.78rem;color:var(--muted);text-transform:uppercase;letter-spacing:.12em;transition:.2s;padding:6px 0;position:relative}
nav.primary a:hover,nav.primary a:focus-visible,nav.primary a[aria-current="page"]{color:var(--ink)}
nav.primary a[aria-current="page"]{color:var(--cyan)}
nav.primary a.nav-cta{color:var(--bg);background:var(--cyan);padding:9px 16px;border-radius:8px;letter-spacing:.08em}
nav.primary a.nav-cta:hover{background:#39d6c6}
.menu-button{display:none;background:none;border:0;color:var(--ink);width:36px;height:30px}

/* ---- buttons ---- */
.button{display:inline-flex;align-items:center;gap:16px;padding:14px 20px;border:1px solid var(--line);font-size:.83rem;font-weight:500;border-radius:9px;transition:.25s;cursor:pointer}
.button-primary{background:var(--cyan);color:#07100f;border-color:var(--cyan)}
.button-primary:hover{background:#39d6c6;transform:translateY(-2px)}
.button-quiet{color:var(--ink)}
.button-quiet:hover{border-color:var(--violet);color:var(--violet)}

/* ---- generic section scaffolding ---- */
.section{max-width:var(--max);margin:auto;padding:120px 24px}
.section.tight{padding:80px 24px}
.eyebrow,.kicker,.project-number{font-size:.7rem;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);font-weight:500;font-family:"DM Sans"}
.eyebrow span{display:inline-block;width:30px;height:1px;background:var(--cyan);vertical-align:middle;margin-right:10px}
.section-heading{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:64px}
.section-heading h2{font-size:clamp(2.4rem,4.6vw,4rem);font-weight:400;letter-spacing:-.045em;margin:.5rem 0 0}
.section-heading>p{max-width:440px;color:var(--muted);margin:0}
.lead{font-size:1.08rem;color:#c2c7d0;max-width:660px}

/* ---- hero (home) ---- */
.hero{max-width:var(--max);margin:auto;padding:160px 24px 80px;display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:center;min-height:92vh}
.hero h1{font-size:clamp(2.9rem,5.6vw,5.4rem);font-weight:400;letter-spacing:-.055em;line-height:1.02;margin:1rem 0 1.6rem}
.hero-intro{max-width:620px;font-size:1.1rem;color:#bcc1cb}
.hero-actions{display:flex;gap:12px;margin:34px 0 26px;flex-wrap:wrap}
.hero-meta{display:flex;gap:26px;flex-wrap:wrap;color:var(--muted);font-size:.76rem;text-transform:uppercase;letter-spacing:.1em}
.hero-meta span{display:flex;align-items:center;gap:8px}
.hero-meta span:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
/* hero visual: orbital emblem */
.hero-visual{position:relative;justify-self:end;width:100%;max-width:460px;aspect-ratio:1;display:grid;place-items:center}
.hero-visual .ring{position:absolute;border-radius:50%;border:1px solid var(--line)}
.hero-visual .ring.r1{inset:0;border-color:rgba(33,193,178,.28)}
.hero-visual .ring.r2{inset:14%;border-color:rgba(245,130,32,.22)}
.hero-visual .ring.r3{inset:30%;border-color:var(--line)}
.hero-visual .core{width:34%;height:34%;border-radius:50%;background:radial-gradient(circle at 35% 30%,#c9fff8,#21c1b2 40%,#F58220 100%);box-shadow:0 0 80px rgba(33,193,178,.35),inset 0 0 40px rgba(255,255,255,.25)}
.hero-visual .node{position:absolute;background:rgba(15,21,31,.85);backdrop-filter:blur(8px);border:1px solid var(--line);border-radius:10px;padding:10px 14px;font-size:.66rem;line-height:1.35;box-shadow:0 15px 30px #0007}
.hero-visual .node b{display:block;font-size:.78rem;font-weight:600}
.hero-visual .node span{color:var(--cyan);text-transform:uppercase;letter-spacing:.1em;font-size:.58rem}
.hero-visual .n1{top:2%;left:-4%}
.hero-visual .n2{top:38%;right:-8%}
.hero-visual .n3{bottom:4%;left:6%}

/* ---- signal strip ---- */
.signal-strip{border-block:1px solid var(--line);min-height:70px;display:flex;align-items:center;justify-content:center;gap:26px;color:#c6cad1;text-transform:uppercase;letter-spacing:.11em;font-size:.66rem;flex-wrap:wrap;padding:14px 24px}
.signal-strip i{width:4px;height:4px;border-radius:50%;background:var(--violet)}

/* ---- metrics ---- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.metric{border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;background:var(--surface)}
.metric b{font-family:Manrope;font-weight:600;font-size:2.6rem;display:block;background:linear-gradient(120deg,#fff,var(--cyan));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.metric span{color:var(--muted);font-size:.82rem}

/* ---- pillars ---- */
.pillars{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.pillar{border:1px solid var(--line);border-radius:var(--radius);padding:34px 30px;background:var(--surface);transition:.25s}
.pillar:hover{border-color:rgba(33,193,178,.4);transform:translateY(-4px)}
.pillar .ic{font-size:1.7rem;color:var(--cyan)}
.pillar h3{font-size:1.25rem;margin:22px 0 10px}
.pillar p{color:var(--muted);font-size:.92rem;margin:0}

/* ---- portfolio cards ---- */
.portfolio{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.pcard{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:34px 32px;display:flex;flex-direction:column;position:relative;overflow:hidden;transition:.25s}
.pcard:hover{border-color:rgba(245,130,32,.4);transform:translateY(-4px)}
.pcard .glow{position:absolute;inset:auto -30% -40% auto;width:60%;height:60%;border-radius:50%;filter:blur(70px);opacity:.16;pointer-events:none}
.pcard-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:16px}
.pcard-badge{font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;padding:5px 10px;border:1px solid var(--line);border-radius:20px;color:var(--cyan)}
.pcard h3{font-size:1.7rem;margin:0}
.pcard .tagline{color:var(--violet);font-size:.82rem;margin:4px 0 14px}
.pcard p{color:var(--muted);font-size:.92rem;margin:0 0 18px}
.pcard .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto}
.pcard .tags span{font-size:.63rem;letter-spacing:.06em;text-transform:uppercase;padding:6px 9px;border:1px solid var(--line);border-radius:6px;color:#c9ced6}
.pcard .picon{width:46px;height:46px;object-fit:contain;margin-bottom:16px}
.project-block .side .picon{width:58px;height:58px;object-fit:contain;margin-bottom:16px}

/* full project detail blocks (projects page) */
.project-block{border-top:1px solid var(--line);padding:70px 0;display:grid;grid-template-columns:.85fr 1.15fr;gap:56px}
.project-block:first-of-type{border-top:0}
.project-block .side .idx{font-family:Manrope;font-size:3rem;color:var(--line);font-weight:600;line-height:1}
.project-block h3{font-size:2.1rem;margin:14px 0 6px}
.project-block .tagline{color:var(--violet);margin:0 0 18px}
.project-block .stage{font-size:.66rem;text-transform:uppercase;letter-spacing:.12em;color:var(--cyan);border:1px solid var(--line);border-radius:20px;padding:6px 12px;display:inline-block}
.project-block .body>p{color:#c2c7d0}
.project-block .facts{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px 0 4px}
.project-block .fact span{display:block;color:var(--violet);font-size:.62rem;text-transform:uppercase;letter-spacing:.14em;margin-bottom:4px}
.project-block .fact p{margin:0;color:#b1b6c0;font-size:.9rem}
.project-block .tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:22px}
.project-block .tags span{font-size:.63rem;letter-spacing:.06em;text-transform:uppercase;padding:6px 9px;border:1px solid var(--line);border-radius:6px;color:#c9ced6}

/* ---- leadership cards (home/team) ---- */
.leaders{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.leader{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.leader:hover{border-color:rgba(33,193,178,.4);transform:translateY(-4px)}
.leader .photo{aspect-ratio:1/1;overflow:hidden;background:linear-gradient(145deg,#252b38,#121622);position:relative}
.leader .photo img{width:100%;height:100%;object-fit:cover;object-position:center top;filter:saturate(.96)}
.leader .photo:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(8,11,18,.55))}
.leader .body{padding:24px 26px 28px}
.leader h3{font-size:1.35rem;margin:0}
.leader .role{color:var(--cyan);font-size:.74rem;text-transform:uppercase;letter-spacing:.1em;margin:6px 0 12px}
.leader p{color:var(--muted);font-size:.9rem;margin:0 0 16px}
.leader .more{font-size:.76rem;color:var(--ink);border-bottom:1px solid var(--line);padding-bottom:3px;transition:.2s}
.leader:hover .more{color:var(--cyan);border-color:var(--cyan)}

/* ================= PROFILE PAGES ================= */
.profile-hero{max-width:var(--max);margin:auto;padding:150px 24px 70px;display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:center}
.portrait-wrap{position:relative;max-width:420px;justify-self:start}
.portrait-wrap .orbit{position:absolute;border:1px solid rgba(33,193,178,.28);border-radius:50%;inset:-7%;transform:rotate(20deg)}
.portrait-wrap .orbit.two{inset:-15%;border-color:rgba(245,130,32,.2);transform:rotate(-25deg)}
.portrait{margin:0;position:relative;overflow:hidden;border-radius:48% 48% 10px 10px;background:linear-gradient(145deg,#252b38,#121622);box-shadow:0 40px 80px rgba(0,0,0,.4)}
.portrait:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 62%,rgba(8,11,18,.38))}
.portrait img{aspect-ratio:.82;object-fit:cover;object-position:center 12%}
.profile-badge{position:absolute;background:rgba(15,21,31,.85);backdrop-filter:blur(10px);border:1px solid var(--line);border-radius:10px;padding:12px 16px;font-size:.7rem;box-shadow:0 15px 30px #0006;display:flex;flex-direction:column}
.profile-badge span{color:var(--cyan);text-transform:uppercase;letter-spacing:.12em;font-size:.58rem}
.profile-badge b{font-size:.82rem;font-weight:600}
.profile-badge.a{top:12%;right:-8%}
.profile-badge.b{bottom:14%;left:-9%}
.profile-hero .intro h1{font-size:clamp(2.6rem,5vw,4.4rem);font-weight:400;letter-spacing:-.05em;margin:.8rem 0 .4rem}
.profile-hero .role-line{color:var(--violet);font-size:1.05rem;margin:0 0 20px}
.profile-hero .intro p.bio{color:#c2c7d0;font-size:1.05rem;max-width:640px}
.profile-hero .quick{display:flex;gap:22px;flex-wrap:wrap;margin:26px 0;color:var(--muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.08em}
.profile-hero .quick span{display:flex;align-items:center;gap:8px}
.profile-hero .quick span:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan)}
.profile-hero .links{display:flex;gap:18px;flex-wrap:wrap;margin-top:4px}
.profile-hero .links a{color:#cdd2da;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;border-bottom:1px solid var(--line);padding-bottom:3px;transition:.2s}
.profile-hero .links a:hover{color:var(--cyan);border-color:var(--cyan)}

/* timeline (experience) */
.timeline{border-top:1px solid var(--line);margin-top:16px}
.timeline-item{display:grid;grid-template-columns:.8fr 1.1fr 1.5fr;gap:30px;padding:36px 0;border-bottom:1px solid var(--line);transition:.25s}
.timeline-item:hover{padding-left:12px}
.timeline-date{color:var(--cyan);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase}
.timeline h3{margin:0;font-size:1.3rem}
.timeline .company{color:var(--violet);margin:.2rem 0}
.timeline-item>p{margin:0;color:var(--muted);font-size:.9rem}

/* principles / values */
.principles{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0 40px}
.principles article{display:grid;grid-template-columns:44px 1fr;gap:16px;border-top:1px solid var(--line);padding:26px 0}
.principles article>span{font-size:.68rem;color:var(--cyan)}
.principles h3{margin:0 0 .4rem;font-size:1.15rem}
.principles p{margin:0;color:var(--muted);font-size:.88rem}

/* skills grid */
.skills-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.skills-grid article{grid-column:span 2;border:1px solid var(--line);border-radius:var(--radius);background:rgba(16,21,32,.7);padding:28px;min-height:210px}
.skills-grid article:nth-child(4),.skills-grid article:nth-child(5){grid-column:span 3}
.skill-icon{font-size:1.8rem;color:var(--cyan)}
.skills-grid h3{margin:26px 0 10px;font-size:1.1rem}
.skills-grid p{color:var(--muted);font-size:.84rem;margin:0}

/* education */
.education-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:12px}
.education-grid article{border:1px solid var(--line);border-radius:var(--radius);padding:36px;background:var(--surface)}
.education-grid span{font-size:.68rem;color:var(--cyan);letter-spacing:.12em}
.education-grid h3{font:500 1.7rem/1.2 Manrope;margin:16px 0}
.education-grid p{color:var(--muted);margin:0}

/* ================= CONTACT ================= */
.contact-wrap{max-width:var(--max);margin:auto;padding:150px 24px 90px;display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:start}
.contact-copy h1{font-size:clamp(2.6rem,5vw,4.4rem);font-weight:400;letter-spacing:-.05em;margin:1rem 0}
.contact-copy p{color:var(--muted);max-width:460px}
.contact-points{list-style:none;padding:0;margin:30px 0 0}
.contact-points li{display:flex;gap:14px;align-items:flex-start;padding:14px 0;border-top:1px solid var(--line);color:#c2c7d0;font-size:.92rem}
.contact-points li b{display:block;color:var(--ink)}
.contact-points li span.ic{color:var(--cyan);font-size:1.1rem;margin-top:2px}
form.contact-form{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);padding:36px}
.field{margin-bottom:20px}
.field label{display:block;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:8px}
.field label .req{color:var(--violet)}
.field input,.field select,.field textarea{width:100%;background:var(--bg);border:1px solid var(--line);border-radius:9px;color:var(--ink);font-family:inherit;font-size:.95rem;padding:13px 14px;transition:.2s}
.field textarea{min-height:130px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--cyan);box-shadow:0 0 0 3px rgba(33,193,178,.15)}
.field .hint{font-size:.72rem;color:var(--faint);margin-top:6px}
.field.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field.two>div{display:flex;flex-direction:column}
.form-foot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:8px}
.form-note{font-size:.72rem;color:var(--faint);max-width:280px}
.form-status{margin-top:18px;padding:14px 16px;border-radius:9px;font-size:.9rem;display:none}
.form-status.show{display:block}
.form-status.ok{background:rgba(33,193,178,.1);border:1px solid rgba(33,193,178,.4);color:#c9fff8}
.form-status.err{background:rgba(255,120,120,.08);border:1px solid rgba(255,120,120,.35);color:#ffc2c2}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* ---- CTA band ---- */
.cta-band{max-width:var(--max);margin:40px auto 0;padding:70px 24px;border-top:1px solid var(--line);display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.cta-band h2{font-size:clamp(2rem,4vw,3.2rem);font-weight:400;letter-spacing:-.04em;margin:0}
.cta-band p{color:var(--muted);margin:.8rem 0 0}
.cta-band .actions{display:flex;gap:12px;flex-wrap:wrap;justify-self:end}

/* ---- footer ---- */
footer.site{border-top:1px solid var(--line);margin-top:40px}
.footer-inner{max-width:var(--max);margin:auto;padding:56px 24px 30px;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-inner .about{max-width:320px}
.footer-inner .about p{color:var(--muted);font-size:.85rem;margin:14px 0 0}
.footer-col h4{font-size:.72rem;text-transform:uppercase;letter-spacing:.12em;color:var(--faint);margin:0 0 16px;font-weight:500}
.footer-col a{display:block;color:var(--muted);font-size:.88rem;padding:5px 0;transition:.2s}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{max-width:var(--max);margin:auto;padding:22px 24px 40px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;border-top:1px solid var(--line-soft);color:var(--faint);font-size:.74rem}

/* ---- reveal-on-scroll ---- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* =========================================================================
   RESPONSIVE
   ========================================================================= */
@media(max-width:960px){
  nav.primary{position:fixed;inset:76px 0 auto;background:#080b12;padding:24px;flex-direction:column;align-items:stretch;gap:6px;transform:translateY(-160%);transition:.3s;border-bottom:1px solid var(--line)}
  nav.primary.open{transform:none}
  nav.primary a{padding:12px 4px;font-size:.9rem}
  nav.primary a.nav-cta{text-align:center;margin-top:8px}
  .menu-button{display:block}
  .menu-button i{display:block;width:22px;height:1.5px;background:currentColor;margin:6px auto}
  .hero,.profile-hero,.contact-wrap{grid-template-columns:1fr;padding-top:120px}
  .hero-visual{justify-self:center;max-width:360px;margin-top:20px}
  .portrait-wrap{justify-self:center}
  .section-heading{flex-direction:column;align-items:flex-start}
  .metrics{grid-template-columns:1fr 1fr}
  .pillars,.portfolio,.leaders,.principles{grid-template-columns:1fr}
  .project-block{grid-template-columns:1fr;gap:24px;padding:48px 0}
  .skills-grid{grid-template-columns:1fr 1fr}
  .skills-grid article,.skills-grid article:nth-child(n){grid-column:span 1}
  .timeline-item{grid-template-columns:1fr 1.4fr}
  .timeline-item>p{grid-column:1/-1}
  .cta-band,.footer-inner{grid-template-columns:1fr}
  .cta-band .actions{justify-self:start}
  .footer-inner{gap:30px}
}
@media(max-width:600px){
  .section{padding:80px 18px}
  .hero{padding:110px 18px 60px}
  .hero h1{font-size:clamp(2.4rem,11vw,3.4rem)}
  .hero-actions{flex-direction:column;align-items:stretch}
  .button{justify-content:center}
  .metrics,.education-grid,.skills-grid,.field.two{grid-template-columns:1fr}
  .profile-badge{display:none}
  .timeline-item{grid-template-columns:1fr;gap:8px}
  .timeline-item>p{grid-column:auto}
  .portrait-wrap .orbit{display:none}
  form.contact-form{padding:24px}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}