/* ============================================================
   TechNest — site styles
   Brand: teal #149A9A / olive #A2A05E / gold #D8AE45 / ink #1B3A34
   ============================================================ */
:root{
  --teal:#149A9A; --teal-deep:#0E7E7E; --olive:#A2A05E; --gold:#D8AE45;
  --ink:#16302B; --ink-2:#1B3A34; --ink-soft:#3C544D; --gray:#8A918C;
  --bg:#FBFBF9; --bg-2:#F3F5F1; --panel:#FFFFFF;
  --line:#E5E9E3; --line-soft:#EEF1ED;
  --accent:var(--teal);

  --disp:'Roboto',system-ui,sans-serif;
  --sans:'Roboto',system-ui,sans-serif;
  --mono:'Roboto Mono',ui-monospace,Menlo,monospace;
  --bangla:'SolaimanLipi','Hind Siliguri','Roboto',sans-serif;

  --r:16px; --r-lg:22px;
  --mw:min(96vw,1800px);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);background:var(--bg);color:var(--ink-2);
  font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
.mono{font-family:var(--mono)}
.wrap{max-width:var(--mw);margin:0 auto;padding:0 clamp(28px,3vw,56px)}
em{font-style:normal;color:var(--teal)}

.eyebrow{
  font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal);display:inline-flex;align-items:center;gap:10px;font-weight:500;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--teal);display:inline-block}

h1,h2,h3{font-family:var(--disp);font-weight:700;letter-spacing:-.02em;line-height:1.05;color:var(--ink-2)}
.h-sec{font-size:clamp(28px,3.6vw,46px)}

/* buttons */
.btn{
  font-family:var(--disp);font-weight:600;font-size:15px;
  display:inline-flex;align-items:center;gap:9px;padding:13px 22px;border-radius:999px;
  border:1.5px solid transparent;cursor:pointer;transition:.18s ease;white-space:nowrap;
}
.btn .arr{transition:transform .18s}
.btn:hover .arr{transform:translateX(3px)}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--teal-deep);border-color:var(--teal-deep)}
.btn-ghost{background:transparent;color:var(--ink-2);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink-2)}

/* ---------------- NAV ---------------- */
.nav{position:sticky;top:0;z-index:100;background:color-mix(in srgb,var(--bg) 86%,transparent);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:12px}
.brand .wm{font-family:var(--disp);font-weight:700;font-size:19px;letter-spacing:-.01em;color:var(--ink-2);white-space:nowrap}
.nav-links a{white-space:nowrap}
.brand .wm .g{color:var(--gray);font-weight:600}
.brand .wm .b{color:var(--teal)}
.nav-links{display:flex;gap:30px;font-family:var(--sans);font-weight:500;font-size:15px}
.nav-links a{color:var(--ink-soft);transition:color .15s;position:relative}
.nav-links a:hover{color:var(--ink-2)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-4px;height:2px;width:0;background:var(--accent);transition:width .2s}
.nav-links a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.nav-toggle span{width:22px;height:2px;background:var(--ink-2);border-radius:2px;transition:.2s}
.mobile-menu{display:none}

/* ---------------- HERO ---------------- */
.hero{position:relative;padding:72px 0 84px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:clamp(38px,5.2vw,66px);line-height:1.08;letter-spacing:-.025em;margin:20px 0 26px}
.hero-sub{font-size:clamp(17px,1.5vw,20px);color:var(--ink-soft);max-width:46ch;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.hero-pills{display:flex;gap:10px;flex-wrap:wrap}
.pill{font-family:var(--mono);font-size:12px;color:var(--ink-soft);background:var(--panel);
  border:1px solid var(--line);border-radius:999px;padding:7px 14px;display:inline-flex;align-items:center;gap:8px}
.pill .dot{width:7px;height:7px;border-radius:50%}

/* hero network panel */
.hero-art{position:relative;aspect-ratio:1/.92;background:
   radial-gradient(120% 120% at 70% 20%, #fff 0%, var(--bg-2) 100%);
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden}
.hero-art svg{position:absolute;inset:0;width:100%;height:100%}
.hero-art .badge{
  position:absolute;left:20px;bottom:20px;background:rgba(255,255,255,.85);backdrop-filter:blur(6px);
  border:1px solid var(--line);border-radius:14px;padding:12px 15px;font-family:var(--mono);font-size:12px;
  display:flex;align-items:center;gap:10px;color:var(--ink-soft)}
.hero-art .badge b{color:var(--ink-2)}
.hero-art .badge .live{width:8px;height:8px;border-radius:50%;background:var(--teal);
  box-shadow:0 0 0 4px color-mix(in srgb,var(--teal) 25%,transparent);animation:pulse 2s infinite}
@keyframes pulse{50%{opacity:.4}}

/* ---------------- MARQUEE ---------------- */
.marq-wrap{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2);
  padding:16px 0;overflow:hidden;white-space:nowrap}
.marq{display:inline-flex;gap:0;animation:marq 38s linear infinite}
.marq span{font-family:var(--mono);font-size:13px;color:var(--ink-soft);padding:0 26px;position:relative}
.marq span::after{content:"◆";color:var(--gold);position:absolute;right:-4px;font-size:8px;top:50%;transform:translateY(-50%)}
@keyframes marq{to{transform:translateX(-50%)}}

/* ---------------- SECTION SCAFFOLD ---------------- */
.section{padding:96px 0;border-bottom:1px solid var(--line)}
.section-alt{background:var(--bg-2)}
.sec-head{margin-bottom:48px;max-width:62ch}
.sec-head h2{margin-top:18px}
.sec-head p{color:var(--ink-soft);margin-top:16px;font-size:17px}

/* ---------------- ABOUT ---------------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.about-lead{font-family:var(--disp);font-weight:500;font-size:clamp(22px,2.4vw,30px);line-height:1.28;letter-spacing:-.01em}
.about-body p{color:var(--ink-soft);margin-bottom:16px;max-width:52ch}
.values{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:6px}
.value{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.value .vi{width:38px;height:38px;border-radius:11px;display:grid;place-items:center;margin-bottom:14px;color:#fff}
.value h4{font-family:var(--disp);font-size:17px;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.value p{font-size:14px;color:var(--ink-soft);line-height:1.5}

/* ---------------- SERVICES ---------------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.svc{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:28px;
  transition:.2s ease;position:relative;display:flex;flex-direction:column;min-height:236px}
.svc:hover{transform:translateY(-3px);border-color:color-mix(in srgb,var(--accent) 40%,var(--line));
  box-shadow:0 18px 40px -22px rgba(22,48,43,.3)}
.svc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.svc-ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:color-mix(in srgb,var(--accent) 12%,#fff);color:var(--accent)}
.svc-num{font-family:var(--mono);font-size:12px;color:var(--gray)}
.svc h3{font-family:var(--disp);font-size:21px;font-weight:600;margin-bottom:10px;letter-spacing:-.01em}
.svc p{font-size:14.5px;color:var(--ink-soft);line-height:1.55;flex:1}
.svc .svc-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:18px;padding-top:16px;border-top:1px dashed var(--line)}
.svc .svc-tags span{font-family:var(--mono);font-size:11px;color:var(--ink-soft);background:var(--bg-2);padding:3px 8px;border-radius:6px}

/* ---------------- PROJECTS ---------------- */
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.proj{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  transition:.2s ease;display:flex;flex-direction:column}
.proj:hover{transform:translateY(-3px);box-shadow:0 22px 46px -24px rgba(22,48,43,.32)}
.proj-vis{aspect-ratio:4/3;position:relative;display:grid;place-items:center;border-bottom:1px solid var(--line);
  background:
    repeating-linear-gradient(135deg,var(--line-soft) 0 1px,transparent 1px 11px),
    var(--bg-2);}
.proj-vis .ph{font-family:var(--mono);font-size:11px;color:var(--gray);background:rgba(255,255,255,.7);
  border:1px solid var(--line);border-radius:8px;padding:5px 11px}
.proj-vis .cat{position:absolute;top:14px;left:14px;font-family:var(--mono);font-size:10px;letter-spacing:.08em;
  text-transform:uppercase;color:#fff;background:var(--ink-2);border-radius:999px;padding:5px 11px}
.proj-body{padding:22px 22px 24px}
.proj-body h3{font-family:var(--disp);font-size:20px;font-weight:600;margin-bottom:8px}
.proj-body p{font-size:14.5px;color:var(--ink-soft);line-height:1.55}
.proj-body .meta{display:flex;gap:8px;margin-top:16px;font-family:var(--mono);font-size:11px;color:var(--gray);flex-wrap:wrap}
.proj-body .meta span{background:var(--bg-2);border-radius:6px;padding:3px 8px}

/* ---------------- TECH STACK ---------------- */
.tech-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center}
.stack{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.stack-item{display:flex;align-items:center;gap:14px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--r);padding:16px 18px}
.stack-item .si-badge{width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
  font-family:var(--mono);font-weight:500;font-size:14px;flex-shrink:0}
.stack-item .si-t{display:flex;flex-direction:column;font-family:var(--disp);font-weight:600;font-size:15px;color:var(--ink-2)}
.stack-item .si-t small{font-family:var(--sans);font-weight:400;font-size:12.5px;color:var(--gray);letter-spacing:0}
.tech-note{color:var(--ink-soft);margin-top:18px;font-size:17px;max-width:46ch}
.tech-note b{color:var(--teal)}

/* ---------------- CONTACT ---------------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px}
.contact h2{font-size:clamp(30px,3.6vw,46px)}
.contact-lead{color:var(--ink-soft);margin:16px 0 28px;font-size:17px;max-width:42ch}
.ci{display:flex;flex-direction:column;gap:6px}
.ci a{display:flex;align-items:center;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);transition:.15s}
.ci a:hover{padding-left:6px}
.ci a:hover .ci-v{color:var(--teal)}
.ci-ic{width:40px;height:40px;border-radius:11px;background:var(--bg-2);display:grid;place-items:center;color:var(--ink-2);flex-shrink:0}
.ci-k{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--gray)}
.ci-v{display:block;font-weight:500;color:var(--ink-2)}

.form{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-lg);padding:30px;position:relative}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.fld{margin-bottom:16px;display:flex;flex-direction:column}
.fld label{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--gray);margin-bottom:7px}
.fld input,.fld select,.fld textarea{font-family:var(--sans);font-size:15px;color:var(--ink-2);
  background:var(--bg);border:1px solid var(--line);border-radius:11px;padding:12px 14px;outline:none;transition:.15s}
.fld input:focus,.fld select:focus,.fld textarea:focus{border-color:var(--teal);box-shadow:0 0 0 3px color-mix(in srgb,var(--teal) 16%,transparent)}
.fld textarea{resize:vertical;min-height:104px}

/* custom select — DOM-rendered dropdown, always anchored to the field */
.csel{position:relative}
.csel select{display:none}
.csel-btn{display:flex;align-items:center;justify-content:space-between;gap:10px;width:100%;text-align:left;
  font-family:var(--sans);font-size:15px;color:var(--ink-2);background:var(--bg);
  border:1px solid var(--line);border-radius:11px;padding:12px 14px;cursor:pointer;outline:none;transition:.15s}
.csel-btn:focus-visible,.csel.open .csel-btn{border-color:var(--teal);box-shadow:0 0 0 3px color-mix(in srgb,var(--teal) 16%,transparent)}
.csel-btn .chev{flex:none;color:var(--gray);transition:transform .18s ease}
.csel.open .csel-btn .chev{transform:rotate(180deg)}
.csel-list{position:absolute;top:calc(100% + 6px);left:0;right:0;z-index:40;margin:0;padding:6px;list-style:none;
  background:var(--panel);border:1px solid var(--line);border-radius:12px;
  box-shadow:0 18px 40px -18px rgba(22,48,43,.35);max-height:264px;overflow:auto;display:none}
.csel.open .csel-list{display:block}
.csel-list li{padding:10px 12px;border-radius:8px;font-size:14.5px;color:var(--ink-2);cursor:pointer}
.csel-list li:hover,.csel-list li.focus{background:var(--bg-2)}
.csel-list li[aria-selected="true"]{color:var(--teal-deep);font-weight:500;background:color-mix(in srgb,var(--teal) 9%,transparent)}
.form .btn-primary{width:100%;justify-content:center;margin-top:4px}
.form-ok{display:none;position:absolute;inset:0;background:var(--panel);border-radius:var(--r-lg);
  flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:30px;gap:8px}
.form-ok.show{display:flex}
.form-ok .ok-ic{width:54px;height:54px;border-radius:50%;background:color-mix(in srgb,var(--teal) 14%,#fff);
  color:var(--teal);display:grid;place-items:center;font-size:26px;margin-bottom:8px}
.form-ok h4{font-family:var(--disp);font-size:20px}
.form-ok p{color:var(--ink-soft)}

/* ---------------- FOOTER ---------------- */
.footer{background:var(--ink);color:#E7ECE8;padding:64px 0 30px}
.footer a{color:rgba(231,236,232,.72)}
.footer a:hover{color:#fff}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1)}
.f-brand{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.f-brand .wm{font-family:var(--disp);font-weight:700;font-size:19px;color:#fff}
.f-brand .wm .g{color:rgba(255,255,255,.55)}
.f-brand .wm .b{color:var(--gold)}
.f-about{color:rgba(231,236,232,.62);max-width:38ch;font-size:14.5px}
.f-col h5{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:16px}
.f-col a{display:block;padding:5px 0;font-size:14.5px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;padding-top:24px;
  font-family:var(--mono);font-size:12px;color:rgba(231,236,232,.5);flex-wrap:wrap;gap:12px}
.socials{display:flex;gap:10px}
.socials a{width:36px;height:36px;border-radius:10px;border:1px solid rgba(255,255,255,.16);display:grid;place-items:center;color:rgba(255,255,255,.7);transition:.15s}
.socials a:hover{background:#fff;color:var(--ink);border-color:#fff}

/* reveal — content is visible in its resting state, with NO dependency on transitions,
   keyframe animations, or rAF (all of which can be frozen in capture/preview/offscreen
   contexts that would otherwise strand content invisible). A gentle rise is layered on
   only where motion is welcome and only on transform, so even a frozen animation never
   hides content — at most it sits a few px low. */
.reveal{opacity:1;transform:none}
@media (prefers-reduced-motion:no-preference){
  .reveal.in{animation:reveal-rise .55s ease both}
}
@keyframes reveal-rise{from{transform:translateY(16px)}to{transform:none}}

/* ---------------- RESPONSIVE ---------------- */
@media (max-width:980px){
  .hero-grid,.about-grid,.tech-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .svc-grid,.proj-grid{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-links,.nav-cta{display:none}
  .nav-toggle{display:flex}
  .mobile-menu{display:none;flex-direction:column;gap:4px;padding:10px 28px 20px;border-bottom:1px solid var(--line);background:var(--bg)}
  .mobile-menu.open{display:flex}
  .mobile-menu a{padding:12px 0;border-bottom:1px solid var(--line-soft);font-weight:500;color:var(--ink-2)}
  .mobile-menu .btn{margin-top:10px;justify-content:center}
  .svc-grid,.proj-grid,.values,.stack,.form-row,.footer-top{grid-template-columns:1fr}
  .section{padding:68px 0}
}