/* ===========================================================
   Ranjan Kumar Nayak — personal site
   Palette: deep navy ink, signal blue, warm orange, light paper
   =========================================================== */

:root{
  --paper:#FBFAF8;
  --surface:#FFFFFF;
  --surface-2:#F5F6F9;
  --ink:#131F35;
  --ink-2:#33415C;
  --muted:#6B7A94;
  --line:#E5E8EF;
  --line-2:#EFF1F6;

  --blue:#1E5FC4;
  --blue-600:#164BA0;
  --blue-tint:#EAF1FD;
  --blue-line:#CFE0F8;

  --orange:#E9640C;
  --orange-600:#C9520A;
  --orange-tint:#FFF1E6;
  --orange-line:#FBD9BF;

  --ok:#0F9D6E;

  --code-bg:#141A22;
  --code-bg-2:#1B222C;
  --code-line:#2A3441;

  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-xl:28px;
  --shadow-sm:0 1px 2px rgba(19,31,53,.05), 0 1px 3px rgba(19,31,53,.04);
  --shadow-md:0 4px 12px rgba(19,31,53,.06), 0 12px 32px rgba(19,31,53,.05);
  --shadow-lg:0 8px 24px rgba(19,31,53,.07), 0 28px 64px rgba(19,31,53,.08);

  --wrap:1180px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.15;letter-spacing:-.02em;font-weight:700}
p{margin:0}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 28px}

/* ---------- Header ---------- */
.site-head{
  position:sticky;top:0;z-index:60;
  background:rgba(251,250,248,.82);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s;
}
.site-head.is-stuck{border-bottom-color:var(--line);box-shadow:var(--shadow-sm)}
.head-in{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.01em}
.mono-badge{
  width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  color:#fff;font-size:13px;font-weight:800;letter-spacing:.02em;
  background:linear-gradient(135deg,var(--blue) 0%,var(--blue-600) 55%,var(--orange) 160%);
  box-shadow:0 3px 10px rgba(30,95,196,.28);
}
.brand-name{font-size:15px}
.brand-sub{display:block;font-size:11.5px;font-weight:500;color:var(--muted);letter-spacing:0}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{
  padding:8px 13px;border-radius:9px;font-size:14px;font-weight:500;color:var(--ink-2);
  transition:background .16s,color .16s;
}
.nav a:hover{background:var(--surface-2);color:var(--ink)}
.head-cta{display:flex;align-items:center;gap:10px}
.icon-btn{
  width:36px;height:36px;border-radius:10px;display:grid;place-items:center;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);
  transition:.16s;
}
.icon-btn:hover{border-color:var(--blue-line);color:var(--blue);background:var(--blue-tint)}
.nav-toggle{display:none}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:11px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;transition:.18s;white-space:nowrap;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 2px 8px rgba(30,95,196,.24)}
.btn-primary:hover{background:var(--blue-600);transform:translateY(-1px);box-shadow:0 6px 16px rgba(30,95,196,.3)}
.btn-accent{background:var(--orange);color:#fff;box-shadow:0 2px 8px rgba(233,100,12,.24)}
.btn-accent:hover{background:var(--orange-600);transform:translateY(-1px)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue-line);color:var(--blue);background:var(--blue-tint)}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}

/* ---------- Section furniture ---------- */
.section{padding:92px 0}
.section-alt{background:var(--surface);border-block:1px solid var(--line-2)}
.sec-head{max-width:660px;margin-bottom:44px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--orange);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--orange)}
.sec-head h2{font-size:clamp(28px,3.4vw,40px)}
.sec-head p{margin-top:14px;color:var(--muted);font-size:17px}

/* ---------- Hero ---------- */
.hero{position:relative;padding:76px 0 84px;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:
    radial-gradient(680px 380px at 8% -10%, rgba(30,95,196,.10), transparent 60%),
    radial-gradient(560px 340px at 92% 6%, rgba(233,100,12,.10), transparent 62%);
}
.hero-grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center;
}
.pill{
  display:inline-flex;align-items:center;gap:9px;
  padding:6px 14px 6px 8px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:13px;font-weight:500;color:var(--ink-2);box-shadow:var(--shadow-sm);
}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 3px rgba(15,157,110,.16)}
.hero h1{font-size:clamp(40px,5.6vw,66px);letter-spacing:-.035em;margin:22px 0 0}
.hero h1 .l2{
  display:block;
  background:linear-gradient(96deg,var(--blue) 8%,var(--orange) 82%);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-tag{margin-top:22px;font-size:18.5px;color:var(--ink-2);max-width:520px;line-height:1.62}
.hero-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap}
.stats{display:flex;gap:34px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap}
.stat b{display:block;font-size:26px;font-weight:800;letter-spacing:-.02em;color:var(--ink)}
.stat span{font-size:12.5px;color:var(--muted);letter-spacing:.01em}

/* code card */
.code-card{
  border-radius:var(--r-lg);background:var(--code-bg);overflow:hidden;
  box-shadow:var(--shadow-lg);border:1px solid #0C1219;transform:rotate(.5deg);
}
.code-bar{
  display:flex;align-items:center;gap:8px;padding:13px 16px;
  background:var(--code-bg-2);border-bottom:1px solid var(--code-line);
}
.tl{width:11px;height:11px;border-radius:50%}
.tl-r{background:#FF5F57}.tl-y{background:#FEBC2E}.tl-g{background:#28C840}
.code-bar .t{margin-left:10px;font-family:var(--mono);font-size:12px;color:#8593A6}
.code-body{padding:20px 22px 24px;font-family:var(--mono);font-size:13px;line-height:1.85;color:#C7D2E0}
.code-body .ln{white-space:pre;overflow:hidden;text-overflow:ellipsis}
.c-prompt{color:#7FD8A6}.c-prompt::before{content:"$ ";color:#4E6076}
.c-comment{color:#5C6E85}
.c-kw{color:#F0883E;font-weight:600}
.c-ok{color:#7FD8A6;margin-top:10px;display:block}
.c-ok::before{content:"✓ ";}
.c-cursor{display:inline-block;width:8px;height:15px;background:#7FD8A6;vertical-align:-2px;animation:blink 1.15s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* intro video card */
.video-frame{position:relative;aspect-ratio:16/9;display:grid;place-items:center;background:radial-gradient(circle at 50% 45%,var(--code-bg-2),var(--code-bg) 70%)}
.video-frame img,.video-frame video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;background:#000}
.video-play{position:relative;z-index:1;width:72px;height:72px;border-radius:50%;border:0;display:grid;place-items:center;cursor:pointer;background:var(--orange);color:#fff;box-shadow:0 8px 24px rgba(233,100,12,.35);transition:transform .2s,background .2s}
.video-play:hover{background:var(--orange-600);transform:scale(1.06)}
.video-play:disabled{background:var(--code-line);color:#8593A6;box-shadow:none;cursor:default;transform:none}
.video-play svg{width:28px;height:28px;margin-left:4px}
.video-note{position:absolute;left:0;right:0;bottom:16px;z-index:1;text-align:center;font-family:var(--mono);font-size:12px;color:#8593A6}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:52px;align-items:start}
.about-kicker{font-size:21px;font-weight:600;letter-spacing:-.015em;color:var(--ink);margin-bottom:20px;line-height:1.42}
.about-body p{color:var(--ink-2);margin-bottom:17px;font-size:16.5px}
.glance{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:8px 22px;box-shadow:var(--shadow-sm)}
.glance .row{display:flex;justify-content:space-between;gap:16px;padding:15px 0;border-bottom:1px solid var(--line-2);font-size:14px}
.glance .row:last-child{border-bottom:0}
.glance .k{color:var(--muted);white-space:nowrap}
.glance .v{color:var(--ink);font-weight:600;text-align:right}

/* ---------- Competency ---------- */
.comp-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.comp{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;position:relative;overflow:hidden;transition:.2s;
}
.comp::after{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--blue);opacity:0;transition:.2s}
.comp.a-orange::after{background:var(--orange)}
.comp:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line)}
.comp:hover::after{opacity:1}
.comp .ico{
  width:44px;height:44px;border-radius:13px;display:grid;place-items:center;margin-bottom:18px;
  background:var(--blue-tint);color:var(--blue);border:1px solid var(--blue-line);
}
.comp.a-orange .ico{background:var(--orange-tint);color:var(--orange);border-color:var(--orange-line)}
.comp h3{font-size:19px;margin-bottom:9px}
.comp p{color:var(--muted);font-size:15px;margin-bottom:18px}
.chips{display:flex;flex-wrap:wrap;gap:7px}
.chip{
  font-size:12.5px;font-weight:500;padding:5px 11px;border-radius:7px;
  background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line-2);
}
.comp.a-orange .chip:nth-child(odd){background:var(--orange-tint);border-color:var(--orange-line);color:var(--orange-600)}
.comp.a-blue .chip:nth-child(odd){background:var(--blue-tint);border-color:var(--blue-line);color:var(--blue-600)}

/* ---------- Current role ---------- */
.role-card{
  display:grid;grid-template-columns:1fr auto;gap:40px;align-items:start;
  background:linear-gradient(135deg,#15274A 0%,#13203A 55%,#1A2C4E 100%);
  color:#fff;border-radius:var(--r-xl);padding:44px 46px;position:relative;overflow:hidden;
  box-shadow:var(--shadow-lg);
}
.role-card::before{
  content:"";position:absolute;right:-90px;top:-90px;width:340px;height:340px;border-radius:50%;
  background:radial-gradient(circle,rgba(233,100,12,.30),transparent 66%);
}
.role-card::after{
  content:"";position:absolute;left:-60px;bottom:-120px;width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(30,95,196,.36),transparent 66%);
}
.role-card > *{position:relative;z-index:1}
.role-badge{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;font-weight:700;
  letter-spacing:.09em;text-transform:uppercase;color:#FFB27A;margin-bottom:16px;
}
.role-card h3{font-size:28px;margin-bottom:6px}
.role-org{color:#9FB4D4;font-size:15.5px}
.role-period{color:#7E93B4;font-size:13.5px;margin-top:4px;font-family:var(--mono)}
.role-sum{color:#C6D4E8;margin-top:20px;max-width:640px;font-size:16px}
.role-hl{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:11px}
.role-hl li{display:flex;gap:11px;align-items:flex-start;color:#DCE6F5;font-size:14.5px}
.role-hl li::before{content:"";flex:none;width:6px;height:6px;border-radius:50%;background:#FF8A3D;margin-top:8px}

/* ---------- Education ---------- */
.timeline{position:relative;padding-left:34px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--blue-line),var(--orange-line))}
.tl-item{position:relative;padding-bottom:34px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--surface);border:3px solid var(--blue);
}
.tl-item:nth-child(even)::before{border-color:var(--orange)}
.tl-period{font-family:var(--mono);font-size:12.5px;color:var(--orange);font-weight:600;letter-spacing:.02em}
.tl-item h3{font-size:18px;margin:7px 0 4px}
.tl-org{font-size:14.5px;color:var(--blue);font-weight:600}
.tl-detail{color:var(--muted);font-size:15px;margin-top:9px;max-width:660px}
.tl-todo{
  display:inline-block;margin-left:8px;font-size:11px;font-weight:700;letter-spacing:.05em;
  padding:2px 7px;border-radius:5px;background:var(--orange-tint);color:var(--orange-600);
  border:1px solid var(--orange-line);vertical-align:2px;
}

/* ---------- Projects ---------- */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:30px}
.filter{
  padding:8px 16px;border-radius:999px;font-size:13.5px;font-weight:600;cursor:pointer;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);transition:.16s;
}
.filter:hover{border-color:var(--blue-line);color:var(--blue)}
.filter.is-on{background:var(--ink);border-color:var(--ink);color:#fff}
.proj-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.proj{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  overflow:hidden;display:flex;flex-direction:column;transition:.2s;
}
.proj:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.proj-thumb{
  position:relative;aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--blue-tint),#F4F7FC 60%,var(--orange-tint));
  display:grid;place-items:center;border-bottom:1px solid var(--line-2);
}
.proj.a-orange .proj-thumb{background:linear-gradient(135deg,var(--orange-tint),#FDF7F2 60%,var(--blue-tint))}
.proj-thumb .ghost{font-family:var(--mono);font-size:11.5px;color:#93A3BC;letter-spacing:.06em;text-transform:uppercase}
.play{
  position:absolute;inset:auto auto 12px 12px;display:inline-flex;align-items:center;gap:7px;
  padding:6px 12px 6px 8px;border-radius:999px;background:rgba(19,31,53,.86);color:#fff;
  font-size:12px;font-weight:600;backdrop-filter:blur(6px);
}
.play svg{flex:none}
.proj-year{position:absolute;top:12px;right:12px;font-family:var(--mono);font-size:11.5px;color:var(--muted);background:rgba(255,255,255,.9);padding:3px 9px;border-radius:6px;border:1px solid var(--line)}
.proj-body{padding:22px;display:flex;flex-direction:column;flex:1}
.proj-cat{font-size:11.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue)}
.proj.a-orange .proj-cat{color:var(--orange)}
.proj h3{font-size:18px;margin:9px 0 10px;letter-spacing:-.015em}
.proj p{color:var(--muted);font-size:14.5px;flex:1}
.proj .chips{margin-top:16px}
.proj-links{display:flex;gap:8px;flex-wrap:wrap;padding:16px 22px;border-top:1px solid var(--line-2);background:#FCFCFD}
.plink{
  display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;
  padding:7px 12px;border-radius:8px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink-2);transition:.16s;
}
.plink:hover{border-color:var(--blue-line);color:var(--blue);background:var(--blue-tint)}
.plink.is-video{border-color:var(--orange-line);color:var(--orange-600);background:var(--orange-tint)}
.plink.is-video:hover{background:var(--orange);color:#fff;border-color:var(--orange)}
.lock{font-size:11px;color:var(--muted);display:inline-flex;align-items:center;gap:4px}

/* ---------- Teasers ---------- */
.teasers{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.teaser{
  border:1px solid var(--line);border-radius:var(--r-xl);padding:36px;background:var(--surface);
  position:relative;overflow:hidden;transition:.2s;
}
.teaser:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.teaser h3{font-size:24px;margin:14px 0 10px}
.teaser p{color:var(--muted);font-size:15.5px;margin-bottom:22px}
.teaser .ico{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:var(--blue-tint);color:var(--blue);border:1px solid var(--blue-line)}
.teaser.a-orange .ico{background:var(--orange-tint);color:var(--orange);border-color:var(--orange-line)}

/* ---------- Footer ---------- */
.site-foot{background:var(--ink);color:#A9B8CE;padding:56px 0 30px;margin-top:0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:36px;border-bottom:1px solid #223050}
.site-foot h4{color:#fff;font-size:13px;letter-spacing:.09em;text-transform:uppercase;margin-bottom:16px}
.site-foot a:hover{color:#fff}
.foot-links{display:grid;gap:10px;font-size:14.5px}
.foot-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:22px;font-size:13px;color:#6E7F9B;flex-wrap:wrap}
.foot-brand p{max-width:340px;font-size:14.5px;margin-top:14px;color:#8FA0B9}

/* ---------- Reveal ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}
.rv.in{opacity:1;transform:none}

/* ---------- Responsive ---------- */
@media(max-width:1000px){
  .hero-grid,.about-grid{grid-template-columns:1fr;gap:44px}
  .comp-grid,.proj-grid,.teasers,.foot-grid{grid-template-columns:1fr 1fr}
  .role-card{grid-template-columns:1fr;padding:34px 30px}
  .code-card{transform:none}
}
@media(max-width:720px){
  .wrap{padding:0 20px}
  .nav{
    display:none;position:absolute;top:70px;left:0;right:0;
    flex-direction:column;gap:2px;padding:12px 20px 18px;
    background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow-md);
  }
  .nav.is-open{display:flex}
  .nav a{padding:12px 14px;font-size:15px}
  .nav-toggle{display:grid}
  .section{padding:64px 0}
  .comp-grid,.proj-grid,.teasers,.foot-grid{grid-template-columns:1fr}
  .stats{gap:24px}
  .brand-sub{display:none}
}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
}