/* =========================================================
   Sachin Sharma — Portfolio
   Design system: deep navy + warm amber, serif display + Inter
   ========================================================= */
:root{
  --navy:#0b1f3a; --navy-2:#0e2747; --navy-3:#13315c;
  --ink:#13203a; --body:#3a4660; --muted:#6b7690;
  --amber:#e9a23b; --amber-d:#c8841f; --teal:#1f8a70;
  --bg:#f7f5f0; --surface:#ffffff; --line:#e6e2d8;
  --ring: rgba(233,162,59,.35);
  --shadow: 0 10px 30px -12px rgba(11,31,58,.18);
  --shadow-lg: 0 24px 60px -18px rgba(11,31,58,.30);
  --r:14px; --r-lg:22px;
  --sans:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --serif:'Fraunces',Georgia,'Times New Roman',serif;
  --maxw:1120px;
}
[data-theme="dark"]{
  --navy:#0a1526; --navy-2:#0c1b30; --navy-3:#13315c;
  --ink:#eef2f8; --body:#c3ccdc; --muted:#8d99b3;
  --bg:#070d18; --surface:#0e1729; --line:#1e2c46;
  --shadow: 0 10px 30px -12px rgba(0,0,0,.5);
  --shadow-lg: 0 24px 60px -18px rgba(0,0,0,.6);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--body);background:var(--bg);
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img,svg{vertical-align:middle}
h1,h2,h3{color:var(--ink);line-height:1.12;margin:0}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-weight:600;font-size:.95rem;
  padding:.7rem 1.15rem;border-radius:50px;border:1.5px solid transparent;cursor:pointer;
  transition:transform .15s ease, box-shadow .2s ease, background .2s ease;white-space:nowrap}
.btn svg{width:18px;height:18px}
.btn--primary{background:var(--amber);color:#1a1206;border-color:var(--amber)}
.btn--primary:hover{background:var(--amber-d);border-color:var(--amber-d);transform:translateY(-2px);box-shadow:0 10px 22px -8px var(--amber-d)}
.btn--ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn--ghost:hover{border-color:var(--amber);color:var(--amber-d);transform:translateY(-2px)}
.btn--lg{padding:.9rem 1.5rem;font-size:1rem}
.btn--on-dark{color:#fff;border-color:rgba(255,255,255,.4)}
.btn--on-dark:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}

/* ── Header / nav ── */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;font-family:var(--serif);font-weight:600}
.brand__mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:var(--navy);color:#fff;font-size:.85rem;letter-spacing:.02em}
.brand__name{color:var(--ink);font-size:1.05rem}
.nav__links{display:flex;align-items:center;gap:1.4rem;list-style:none;margin:0;padding:0}
.nav__links a{font-size:.92rem;font-weight:500;color:var(--body)}
.nav__links a:hover{color:var(--amber-d)}
.nav__cta{padding:.45rem 1rem;border:1.5px solid var(--line);border-radius:50px;color:var(--ink)!important;font-weight:600}
.nav__cta:hover{border-color:var(--amber)}
.theme-toggle{background:none;border:1px solid var(--line);width:36px;height:36px;border-radius:50%;
  cursor:pointer;font-size:1rem;color:var(--ink);line-height:1}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav__toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* ── Hero ── */
.hero{padding:clamp(2.5rem,6vw,5rem) 0 clamp(2rem,4vw,3.5rem);position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-30% -10% auto 40%;height:120%;
  background:radial-gradient(closest-side,var(--ring),transparent 70%);pointer-events:none;opacity:.6}
.hero__grid{display:grid;grid-template-columns:1.55fr .9fr;gap:clamp(1.5rem,4vw,3.5rem);align-items:center}
.hero__eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.8rem;font-weight:600;
  color:var(--teal);background:color-mix(in srgb,var(--teal) 12%,transparent);
  padding:.35rem .8rem;border-radius:50px;margin:0 0 1.1rem}
.hero__eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 0 var(--teal);animation:pulse 2.2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--teal) 60%,transparent)}70%{box-shadow:0 0 0 8px transparent}100%{box-shadow:0 0 0 0 transparent}}
.hero__name{font-family:var(--serif);font-weight:700;font-size:clamp(2.6rem,7vw,4.4rem);letter-spacing:-.02em}
.hero__role{font-weight:600;color:var(--amber-d);font-size:clamp(1rem,2.2vw,1.25rem);margin:.5rem 0 0}
.hero__tagline{font-family:var(--serif);font-size:clamp(1.15rem,2.6vw,1.5rem);color:var(--ink);margin:.8rem 0 0;font-weight:500}
.hero__intro{max-width:60ch;margin:1rem 0 1.6rem;font-size:1.02rem}
.hero__cta{display:flex;flex-wrap:wrap;gap:.7rem}
.hero__social{display:flex;gap:.5rem;list-style:none;padding:0;margin:1.6rem 0 0}
.hero__social a{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;
  border:1px solid var(--line);color:var(--body);background:var(--surface);transition:.18s}
.hero__social a:hover{color:#fff;background:var(--navy);border-color:var(--navy);transform:translateY(-3px)}

.hero__card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:1.6rem;box-shadow:var(--shadow-lg)}
.avatar{width:84px;height:84px;border-radius:24px;display:grid;place-items:center;margin:0 auto 1rem;
  font-family:var(--serif);font-weight:700;font-size:2rem;color:#fff;
  background:linear-gradient(135deg,var(--navy),var(--navy-3));box-shadow:var(--shadow)}
.hero__facts{list-style:none;margin:0 0 1.2rem;padding:0;display:grid;gap:.55rem;font-size:.9rem}
.hero__facts li{display:flex;align-items:center;gap:.6rem}
.hero__facts svg{color:var(--amber-d);flex:none}
.hero__facts a{color:var(--body);word-break:break-word}
.hero__facts a:hover{color:var(--amber-d)}
.hero__stats{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;border-top:1px solid var(--line);padding-top:1.1rem}
.stat b{display:block;font-family:var(--serif);font-size:1.5rem;color:var(--ink)}
.stat span{font-size:.74rem;color:var(--muted)}

/* ── Section scaffolding ── */
.section{padding:clamp(3rem,7vw,5.5rem) 0}
.section--alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section__eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--amber-d);margin:0 0 .6rem}
.section__eyebrow--light{color:var(--amber)}
.section__title{font-family:var(--serif);font-weight:700;font-size:clamp(1.7rem,4vw,2.5rem);letter-spacing:-.01em;max-width:18ch}
.section__lead{max-width:62ch;margin:1rem 0 0;font-size:1.05rem}
.prose{max-width:74ch;font-size:1.08rem;margin:1.2rem 0 0}
.subhead{font-family:var(--serif);font-size:1.2rem;margin:1.8rem 0 .6rem;color:var(--ink)}

/* ── Impact band ── */
.band{background:var(--navy);color:#fff;padding:clamp(2rem,4vw,3rem) 0}
.band__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;text-align:center}
.band__stat b{display:block;font-family:var(--serif);font-size:clamp(2rem,5vw,3rem);color:var(--amber)}
.band__stat span{font-size:.85rem;color:rgba(255,255,255,.7)}

/* ── Cards (projects/research) ── */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.3rem;margin-top:2rem}
.cards--2{grid-template-columns:repeat(auto-fit,minmax(330px,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:1.5rem;
  display:flex;flex-direction:column;transition:transform .2s ease, box-shadow .2s ease}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card__top{display:flex;align-items:center;justify-content:space-between;gap:.8rem}
.card__name{font-family:var(--serif);font-size:1.4rem;font-weight:700}
.card__name--sm{font-size:1.12rem;line-height:1.3}
.card__tag{font-size:.78rem;font-weight:600;color:var(--amber-d);text-transform:uppercase;letter-spacing:.04em;margin:.5rem 0 .7rem}
.card__blurb{font-size:.95rem;flex:1;margin:0}
.badge{font-size:.7rem;font-weight:700;padding:.25rem .6rem;border-radius:50px;white-space:nowrap}
.badge.is-live{background:color-mix(in srgb,var(--teal) 16%,transparent);color:var(--teal)}
.badge.is-build{background:color-mix(in srgb,var(--amber) 18%,transparent);color:var(--amber-d)}
.badge.is-soon{background:color-mix(in srgb,var(--muted) 18%,transparent);color:var(--muted)}
.chips{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;padding:0;margin:1rem 0}
.chips li{font-size:.74rem;font-weight:600;color:var(--body);background:var(--bg);
  border:1px solid var(--line);border-radius:50px;padding:.25rem .65rem}
.card__link{display:inline-flex;align-items:center;gap:.4rem;font-weight:600;color:var(--amber-d);font-size:.9rem;margin-top:auto}
.card__link svg{width:16px;height:16px;transition:transform .15s}
.card__link:hover svg{transform:translateX(3px)}
.card__link.is-muted{color:var(--muted);font-style:italic}

/* ── Timeline ── */
.timeline{margin-top:2.2rem;position:relative;padding-left:6px}
.tl-item{position:relative;padding:0 0 1.8rem 2rem;border-left:2px solid var(--line)}
.tl-item:last-child{border-left-color:transparent}
.tl-dot{position:absolute;left:-9px;top:2px;width:16px;height:16px;border-radius:50%;
  background:var(--amber);border:3px solid var(--bg)}
.section--alt .tl-dot{border-color:var(--surface)}
.tl-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:.5rem}
.tl-role{font-family:var(--serif);font-size:1.2rem;font-weight:600}
.tl-period{font-size:.82rem;font-weight:600;color:var(--muted);white-space:nowrap}
.tl-org{color:var(--amber-d);font-weight:600;font-size:.92rem;margin:.2rem 0 .6rem}
.tl-points{margin:0;padding-left:1.1rem;display:grid;gap:.4rem;font-size:.96rem}
.tl-points li::marker{color:var(--amber)}

/* ── Two-column (education/awards) ── */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem)}
.list{list-style:none;margin:1.2rem 0 0;padding:0}
.list__row{display:flex;justify-content:space-between;gap:1rem;padding:.7rem 0;border-bottom:1px solid var(--line)}
.list__row b{display:block;color:var(--ink)}
.list__row span{font-size:.88rem;color:var(--muted)}
.list__row em{font-style:normal;font-weight:600;color:var(--amber-d);white-space:nowrap}
.awards{list-style:none;margin:1.2rem 0 0;padding:0;display:grid;gap:1rem}
.award{display:flex;gap:1rem;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1rem 1.2rem}
.section--alt .award{background:var(--bg)}
.award__year{font-family:var(--serif);font-weight:700;color:var(--amber-d);font-size:1.05rem;flex:none}
.award b{display:block;color:var(--ink)}
.award span{display:block;font-size:.85rem;color:var(--muted);margin:.1rem 0 .3rem}
.award p{margin:0;font-size:.9rem}

/* ── Skills ── */
.skills{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.2rem;margin-top:2rem}
.skill{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:1.2rem 1.3rem}
.skill h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--amber-d);margin-bottom:.7rem}

/* ── CTA section ── */
.section--cta{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff}
.cta{text-align:center;max-width:64ch;margin:0 auto}
.cta__title{font-family:var(--serif);font-size:clamp(1.7rem,4vw,2.6rem);color:#fff;margin:.4rem 0 0}
.cta__lead{color:rgba(255,255,255,.8);margin:1rem auto 1.8rem;font-size:1.05rem}
.cta__buttons{display:flex;flex-wrap:wrap;gap:.8rem;justify-content:center}

/* ── Footer ── */
.site-footer{background:var(--navy);color:rgba(255,255,255,.8);padding:2.5rem 0 1.5rem}
.footer__grid{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.2rem}
.footer__name{font-family:var(--serif);font-size:1.3rem;color:#fff;font-weight:600}
.footer__tag{margin:.2rem 0 0;font-size:.9rem;color:rgba(255,255,255,.6)}
.footer__social{display:flex;gap:.5rem;list-style:none;padding:0;margin:0}
.footer__social a{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;
  border:1px solid rgba(255,255,255,.2);color:#fff;transition:.18s}
.footer__social a:hover{background:var(--amber);color:#1a1206;border-color:var(--amber)}
.footer__legal{margin-top:1.5rem;padding-top:1.2rem;border-top:1px solid rgba(255,255,255,.12);font-size:.82rem;color:rgba(255,255,255,.5)}

/* ── Reveal animation ── */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}.hero__eyebrow .dot{animation:none}}

/* ── Responsive ── */
@media (max-width:880px){
  .hero__grid{grid-template-columns:1fr}
  .hero__card{order:-1;max-width:420px}
  .two-col{grid-template-columns:1fr}
  .band__grid{grid-template-columns:repeat(2,1fr);gap:1.2rem}
  .nav__toggle{display:flex}
  .nav__links{position:fixed;inset:66px 0 auto 0;flex-direction:column;align-items:flex-start;gap:0;
    background:var(--surface);border-bottom:1px solid var(--line);padding:.5rem 24px 1rem;
    transform:translateY(-130%);transition:transform .28s ease;box-shadow:var(--shadow)}
  .nav__links.open{transform:none}
  .nav__links li{width:100%}
  .nav__links a{display:block;padding:.7rem 0;width:100%}
  .nav__cta{display:inline-block;margin-top:.4rem}
}
@media (max-width:520px){
  .band__grid{grid-template-columns:1fr 1fr}
  .hero__cta .btn{flex:1}
}

/* =========================================================
   RÉSUMÉ PAGE
   ========================================================= */
.resume-body{background:var(--bg)}
.resume-toolbar{max-width:820px;margin:1.2rem auto 0;padding:0 24px;display:flex;justify-content:space-between;align-items:center;gap:1rem}
.rt-back{font-weight:600;color:var(--body)}
.rt-back:hover{color:var(--amber-d)}
.resume{max-width:820px;background:var(--surface);margin:1.2rem auto 3rem;padding:clamp(1.5rem,4vw,3rem);
  border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow)}
.r-head h1{font-family:var(--serif);font-size:2.2rem;letter-spacing:-.01em}
.r-role{color:var(--amber-d);font-weight:600;margin:.25rem 0 .8rem}
.r-contact,.r-links{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem 1.2rem;padding:0;margin:0;font-size:.88rem}
.r-contact li{display:flex;align-items:center;gap:.4rem;color:var(--body)}
.r-contact svg{width:15px;height:15px;color:var(--amber-d)}
.r-links{margin-top:.5rem}
.r-links a{color:var(--amber-d);font-weight:600}
.r-sec{margin-top:1.6rem}
.r-sec h2{font-family:var(--serif);font-size:1.15rem;color:var(--ink);border-bottom:2px solid var(--amber);
  padding-bottom:.3rem;margin-bottom:.7rem}
.r-sec p{margin:0 0 .5rem;font-size:.92rem}
.r-proj{margin-bottom:.7rem}
.r-proj__h,.r-job__h{display:flex;justify-content:space-between;gap:1rem;align-items:baseline;flex-wrap:wrap}
.r-proj__h b,.r-job__h b{color:var(--ink)}
.r-proj__h span,.r-job__h span{font-size:.8rem;color:var(--muted)}
.r-job{margin-bottom:1rem}
.r-job__org{color:var(--amber-d);font-weight:600;font-size:.88rem;margin:.1rem 0 .4rem}
.r-job ul,.r-plain,.r-skills{margin:.2rem 0;padding-left:1.1rem;font-size:.9rem;display:grid;gap:.3rem}
.r-plain{list-style:none;padding-left:0}
.r-yr{color:var(--muted);font-weight:600}
.r-twocol{display:grid;grid-template-columns:1fr 1fr;gap:1.6rem}
@media (max-width:640px){.r-twocol{grid-template-columns:1fr}}

@media print{
  @page{margin:14mm}
  body{background:#fff}
  .no-print{display:none!important}
  .resume{box-shadow:none;border:none;margin:0;padding:0;max-width:100%}
  .r-sec{break-inside:avoid}
  .r-job,.r-proj,.award{break-inside:avoid}
  a{color:#000;text-decoration:none}
  .r-sec h2{border-color:#000}
}

/* Vidaara feature highlights (flagship card) */
.card__features-title{font-size:.8rem;font-weight:700;color:var(--teal);text-transform:uppercase;letter-spacing:.04em;margin:.9rem 0 .45rem}
.card__features{list-style:none;padding:0;margin:0 0 .5rem;display:grid;gap:.5rem}
.card__features li{position:relative;padding-left:1.15rem;font-size:.9rem;color:var(--body);line-height:1.5}
.card__features li::before{content:"";position:absolute;left:0;top:.5em;width:.42rem;height:.42rem;border-radius:50%;background:var(--amber)}