/* Susanta Ghosh — Executive Portfolio
   Design: light editorial + dark industrial hero.
   Palette: graphite, warm paper, molten-copper accent, green-steel accent. */

:root{
  --ink:#14171c;          /* primary text */
  --ink-soft:#434a55;     /* secondary text */
  --muted:#6b7480;        /* muted text */
  --paper:#faf9f6;        /* page bg */
  --paper-2:#ffffff;      /* cards */
  --line:rgba(20,23,28,.10);
  --graphite:#16402b;     /* forest green — primary dark surface */
  --graphite-2:#1f5538;
  --copper:#b5622e;       /* molten steel accent */
  --copper-soft:#c9794a;
  --green:#2f8f5b;        /* green steel accent */
  --green-soft:#e7f2ec;
  --radius:14px;
  --radius-lg:22px;
  --wrap:1120px;
  --shadow:0 1px 2px rgba(20,23,28,.05),0 8px 30px rgba(20,23,28,.06);
  --serif:"Cormorant Garamond","Georgia",serif;
  --sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);
  line-height:1.6;-webkit-font-smoothing:antialiased;font-size:17px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.1;margin:0;letter-spacing:-.01em}
h1{font-size:clamp(2.4rem,6vw,4.4rem)}
h2{font-size:clamp(1.8rem,4vw,2.9rem)}
h3{font-size:1.35rem}
p{margin:0 0 1rem}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
.eyebrow{font-family:var(--sans);font-weight:600;font-size:.78rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--copper)}
.lede{font-size:1.2rem;color:var(--ink-soft);max-width:60ch}
.muted{color:var(--muted)}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(250,249,246,.82);
  backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:600}
.monogram{width:38px;height:38px;border-radius:9px;display:grid;place-items:center;
  background:var(--graphite);color:#fff;font-family:var(--serif);font-size:.95rem;letter-spacing:.02em}
.brand .bname{font-family:var(--serif);font-size:1.05rem}
.brand .brole{font-size:.72rem;color:var(--muted);letter-spacing:.04em}
.navlinks{display:flex;gap:28px;align-items:center}
.navlinks a{font-size:.92rem;color:var(--ink-soft);font-weight:500;position:relative}
.navlinks a:hover{color:var(--ink)}
.navlinks a.active{color:var(--ink)}
.navlinks a.active::after{content:"";position:absolute;left:0;right:0;bottom:-24px;height:2px;background:var(--copper)}
.nav-cta{background:var(--graphite);color:#fff;padding:9px 18px;border-radius:999px;font-size:.88rem;font-weight:600}
.nav-cta:hover{background:var(--graphite-2)}
.navtoggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.navtoggle span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;transition:.2s}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:9px;font-weight:600;font-size:.95rem;
  padding:13px 24px;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:.18s}
.btn-primary{background:var(--copper);color:#fff}
.btn-primary:hover{background:var(--copper-soft);transform:translateY(-1px)}
.btn-dark{background:#fff;color:var(--ink)}
.btn-dark:hover{transform:translateY(-1px)}
.btn-ghost{border-color:rgba(255,255,255,.3);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-outline{border-color:var(--line);color:var(--ink);background:#fff}
.btn-outline:hover{border-color:var(--ink)}

/* ---------- Hero (dark) ---------- */
.hero{background:
   radial-gradient(1200px 500px at 80% -10%,rgba(181,98,46,.28),transparent 60%),
   linear-gradient(180deg,var(--graphite),#0c1f15);
  color:#f3f1ec;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;opacity:.06;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.6) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.6) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(70% 70% at 50% 30%,#000,transparent)}
.hero .wrap{position:relative;z-index:2;display:grid;grid-template-columns:1.25fr .9fr;gap:48px;
  align-items:center;padding-top:72px;padding-bottom:84px}
.hero h1{color:#fff;margin:.5rem 0 1.2rem}
.hero .lede{color:#c9cdd3;font-size:1.22rem}
.hero .eyebrow{color:var(--copper-soft)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px}
.portrait{aspect-ratio:4/5;border-radius:var(--radius-lg);overflow:hidden;position:relative;
  background:linear-gradient(160deg,#245139,#0e2a1c);border:1px solid rgba(255,255,255,.1);
  box-shadow:0 30px 60px rgba(0,0,0,.4);display:grid;place-items:center}
.portrait img{width:100%;height:100%;object-fit:cover}
.portrait .ph{text-align:center;color:#6f7a87;padding:24px}
.portrait .ph .mg{font-family:var(--serif);font-size:3.4rem;color:#8b97a5}

/* stat strip */
.stats{border-top:1px solid rgba(255,255,255,.1);background:#0c1f15;color:#dfe2e6}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:32px 24px}
.stat .n{font-family:var(--serif);font-size:2.1rem;color:#fff;line-height:1}
.stat .l{font-size:.86rem;color:#9aa3ad;margin-top:6px}

/* ---------- Sections ---------- */
section{padding:84px 0}
.section-head{max-width:720px;margin-bottom:48px}
.section-head h2{margin:.5rem 0 1rem}
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

.card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(20,23,28,.05),0 18px 44px rgba(20,23,28,.10)}
.card .ic{width:44px;height:44px;border-radius:11px;display:grid;place-items:center;
  background:var(--green-soft);color:var(--green);margin-bottom:16px;font-size:1.3rem}
.card.copper .ic{background:#f6e7dc;color:var(--copper)}
.card h3{margin-bottom:8px}
.card p{color:var(--ink-soft);font-size:.98rem;margin:0}

.alt{background:#f2efe9}
.dark-sec{background:var(--graphite);color:#e9ebee}
.dark-sec .eyebrow{color:var(--copper-soft)}
.dark-sec h2{color:#fff}
.dark-sec p{color:#b9c0c8}

/* ---------- Timeline ---------- */
.timeline{position:relative;margin-top:20px}
.tl-item{position:relative;padding:0 0 42px 92px}
.tl-item::before{content:"";position:absolute;left:34px;top:8px;bottom:-8px;width:2px;background:var(--line)}
.tl-item:last-child::before{display:none}
.tl-dot{position:absolute;left:22px;top:4px;width:26px;height:26px;border-radius:50%;
  background:#fff;border:2px solid var(--copper);display:grid;place-items:center}
.tl-dot::after{content:"";width:9px;height:9px;border-radius:50%;background:var(--copper)}
.tl-date{font-size:.82rem;font-weight:600;letter-spacing:.06em;color:var(--copper);text-transform:uppercase}
.tl-item h3{margin:4px 0 2px}
.tl-co{font-weight:600;color:var(--ink)}
.tl-meta{font-size:.9rem;color:var(--muted);margin-bottom:12px}
.tl-item ul{margin:10px 0 0;padding-left:18px}
.tl-item li{color:var(--ink-soft);margin-bottom:7px;font-size:.98rem}
.tag{display:inline-block;font-size:.74rem;font-weight:600;padding:3px 10px;border-radius:999px;
  background:var(--green-soft);color:var(--green);margin:0 6px 6px 0;letter-spacing:.02em}
.tag.copper{background:#f6e7dc;color:var(--copper)}

/* ---------- Videos ---------- */
.video-embed{aspect-ratio:16/9;border-radius:var(--radius);overflow:hidden;background:#000;border:1px solid var(--line)}
.video-embed iframe{width:100%;height:100%;border:0}
.video-ph{aspect-ratio:16/9;border-radius:var(--radius);display:grid;place-items:center;text-align:center;
  background:linear-gradient(160deg,#245139,#0e2a1c);color:#9aa3ad;border:1px dashed rgba(255,255,255,.2)}
.video-ph .play{width:64px;height:64px;border-radius:50%;background:var(--copper);display:grid;place-items:center;
  margin:0 auto 14px;color:#fff;font-size:1.5rem}

/* ---------- CTA band ---------- */
.band{background:
  radial-gradient(900px 400px at 10% 120%,rgba(47,143,91,.3),transparent 60%),
  linear-gradient(120deg,var(--graphite),#0c1f15);color:#fff;border-radius:var(--radius-lg);
  padding:56px;text-align:center;margin:0 auto}
.band h2{color:#fff;margin-bottom:12px}
.band p{color:#c3c9d0;max-width:52ch;margin:0 auto 26px}
.band .hero-cta{justify-content:center}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.contact-card{display:flex;gap:16px;align-items:flex-start;padding:24px;border:1px solid var(--line);
  border-radius:var(--radius);background:#fff}
.contact-card .ic{width:46px;height:46px;border-radius:12px;background:var(--graphite);color:#fff;
  display:grid;place-items:center;flex:0 0 auto;font-size:1.2rem}
.contact-card .l{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.contact-card .v{font-weight:600}

/* ---------- Footer ---------- */
.footer{background:var(--graphite);color:#aeb6bf;padding:52px 0 36px}
.footer .wrap{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.footer a{color:#cfd4da}
.footer a:hover{color:#fff}
.footer .fcol h4{color:#fff;font-family:var(--sans);font-size:.8rem;letter-spacing:.1em;
  text-transform:uppercase;margin-bottom:14px}
.footer .fcol a{display:block;font-size:.92rem;margin-bottom:9px}
.footer .copy{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:22px;
  width:100%;font-size:.84rem;color:#7f8893;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* page header (interior) */
.page-head{background:
  radial-gradient(900px 400px at 85% -20%,rgba(181,98,46,.22),transparent 60%),
  linear-gradient(180deg,var(--graphite),#0c1f15);color:#fff;padding:72px 0 64px}
.page-head .lede{color:#c3c9d0}
.page-head h1{color:#fff;font-size:clamp(2.1rem,5vw,3.4rem);margin:.4rem 0 1rem}

/* prose */
.prose p{color:var(--ink-soft);max-width:68ch}
.prose h3{margin:32px 0 10px}
.two-col{display:grid;grid-template-columns:1.4fr .9fr;gap:48px;align-items:start}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.side-card h4{font-family:var(--sans);font-size:.78rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:14px}
.side-card ul{list-style:none;padding:0;margin:0}
.side-card li{padding:10px 0;border-bottom:1px solid var(--line);font-size:.95rem}
.side-card li:last-child{border:0}
.side-card li span{display:block;font-size:.8rem;color:var(--muted)}

.js .reveal{opacity:0;transform:translateY(18px);transition:.6s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:36px;padding-top:52px;padding-bottom:60px}
  .portrait{max-width:320px}
  .stats .wrap{grid-template-columns:repeat(2,1fr);gap:20px}
  .g3,.g2,.two-col,.contact-grid{grid-template-columns:1fr}
  .navlinks{position:fixed;inset:68px 0 auto 0;background:var(--paper);flex-direction:column;
    align-items:flex-start;gap:0;padding:12px 24px 20px;border-bottom:1px solid var(--line);
    transform:translateY(-120%);transition:.25s;box-shadow:var(--shadow)}
  .navlinks.open{transform:none}
  .navlinks a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .navlinks a.active::after{display:none}
  .nav-cta{margin-top:10px}
  .navtoggle{display:block}
  section{padding:60px 0}
  .band{padding:40px 22px}
}

/* ---------- Contact form ---------- */
.contact-form{display:flex;flex-direction:column;gap:16px}
.contact-form .field{display:flex;flex-direction:column;gap:6px}
.contact-form label{font-size:.82rem;font-weight:600;color:var(--ink)}
.contact-form label span{color:var(--muted);font-weight:400}
.contact-form input,.contact-form textarea{font:inherit;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:10px;padding:12px 14px;width:100%;transition:.15s}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--copper);
  box-shadow:0 0 0 3px rgba(181,98,46,.15)}
.contact-form textarea{resize:vertical}
.contact-form .hpot{position:absolute;left:-9999px}
.contact-form button{margin-top:4px;align-self:flex-start}
.cf-status{margin:4px 0 0;font-size:.92rem;font-weight:600}
.cf-status.ok{color:var(--green)}
.cf-status.err{color:#b4442e}