/* ================= Amal Krishna — design system ================= */
:root{
  --bg: #faf6f0;
  --surface: #ffffff;
  --surface-2: #f2ece1;
  --line: #e6ddcd;
  --text: #221e19;
  --text-dim: #6b6255;
  --text-faint: #9a9081;
  --ink: #1c1712;

  /* domain colors — one per case-study track */
  --itsm: #e8663d;    /* primary accent — IT Service Transformation */
  --mfg: #c2932a;     /* Manufacturing */
  --supply: #4f8f3f;  /* Supply Chain */
  --hr: #9557aa;      /* HR Analytics */
  --warm-glow: #e8663d;

  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --sans: 'IBM Plex Sans', -apple-system, sans-serif;
}

*{box-sizing:border-box; margin:0; padding:0;}
html{scroll-behavior:smooth;}
body{background:var(--bg); color:var(--text); font-family:var(--sans); line-height:1.65;}
a{color:inherit;}
img{max-width:100%; display:block;}
.wrap{max-width:1100px; margin:0 auto; padding:0 32px;}
.wrap-narrow{max-width:820px; margin:0 auto; padding:0 32px;}

/* ---------- Nav ---------- */
nav.site-nav{
  position:sticky; top:0; z-index:50;
  background:rgba(250,246,240,0.88); backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
nav.site-nav .wrap{display:flex; align-items:center; justify-content:space-between; height:60px; max-width:1180px;}
.logo{font-family:var(--mono); font-weight:600; font-size:14.5px; letter-spacing:0.02em; white-space:nowrap;}
.logo span{color:var(--itsm);}
.nav-links{display:flex; gap:22px; flex-wrap:wrap;}
.nav-links a{
  text-decoration:none; color:var(--text-dim); font-family:var(--mono);
  font-size:12.5px; letter-spacing:0.03em; transition:color .15s;
}
.nav-links a:hover, .nav-links a.active{color:var(--text);}
.nav-links a.active{color:var(--itsm);}
.nav-links a{position:relative;}
.nav-links a::after{
  content:''; position:absolute; left:0; right:100%; bottom:-4px; height:2px; background:var(--itsm);
  transition:right .2s ease;
}
.nav-links a:hover::after, .nav-links a.active::after{right:0;}
.nav-toggle{display:none;}

@media (max-width:860px){
  nav.site-nav .wrap{flex-wrap:wrap; height:auto; padding-top:14px; padding-bottom:14px; gap:10px;}
  .nav-links{gap:14px; width:100%; overflow-x:auto;}
}

/* ---------- Page header ---------- */
.page-header{padding:64px 0 40px; border-bottom:1px solid var(--line);}
.eyebrow{
  font-family:var(--mono); font-size:12.5px; letter-spacing:0.12em; text-transform:uppercase;
  color:var(--itsm); margin-bottom:14px; display:flex; align-items:center; gap:9px;
}
.eyebrow .dot{width:6px; height:6px; border-radius:50%; background:currentColor;}
h1.page-title{font-family:var(--mono); font-weight:700; font-size:clamp(30px,5vw,46px); line-height:1.1; margin-bottom:16px;}
.page-lede{color:var(--text-dim); font-size:16.5px; max-width:640px;}

/* ---------- generic section ---------- */
section{padding:64px 0;}
section + section{border-top:1px solid var(--line);}
.section-head{display:flex; align-items:baseline; justify-content:space-between; margin-bottom:36px; gap:16px; flex-wrap:wrap;}
.section-title{font-family:var(--mono); font-size:21px; font-weight:600;}
.section-sub{font-family:var(--mono); font-size:11.5px; color:var(--text-faint); letter-spacing:0.05em;}

/* ---------- buttons ---------- */
.btn{
  font-family:var(--mono); font-size:12.5px; letter-spacing:0.03em; padding:11px 19px; border-radius:2px;
  text-decoration:none; display:inline-flex; align-items:center; gap:8px; border:1px solid var(--line);
  transition:border-color .15s, background .15s, transform .15s, box-shadow .15s; cursor:pointer; background:transparent; color:var(--text);
}
.btn-primary{background:var(--itsm); color:#fff; border-color:var(--itsm); font-weight:600;}
.btn-primary:hover{background:#d4552e;}
.btn-ghost:hover{border-color:var(--text-dim);}

/* ---------- stat rows ---------- */
.stat-list{display:flex; flex-direction:column;}
.stat{display:flex; justify-content:space-between; align-items:center; padding:13px 0; border-bottom:1px solid var(--line); font-family:var(--mono); font-size:13px;}
.stat:first-child{border-top:1px solid var(--line);}
.stat-label{color:var(--text-faint);}
.stat-value{color:var(--text); font-weight:600;}

/* ---------- case study cards ---------- */
.case-grid{display:flex; flex-direction:column; gap:18px;}
.case-card{
  background:var(--surface); border:1px solid var(--line); border-left:3px solid var(--tab, var(--itsm));
  border-radius:2px; padding:26px 28px; display:grid; grid-template-columns:1fr auto; gap:20px;
  transition:border-color .15s, transform .15s; text-decoration:none;
}
.case-card:hover{transform:translateY(-2px); border-color:#39485a;}
.case-domain{font-family:var(--mono); font-size:11px; letter-spacing:0.09em; text-transform:uppercase; color:var(--tab, var(--itsm)); margin-bottom:9px; font-weight:600; display:flex; align-items:center; gap:8px;}
.case-status{font-size:9.5px; background:var(--surface-2); border:1px solid var(--line); color:var(--text-faint); padding:2px 7px; border-radius:10px; letter-spacing:0.04em;}
.case-status.live{color:var(--itsm); border-color:var(--itsm);}
.case-title{font-size:18.5px; font-weight:600; margin-bottom:9px; color:var(--text);}
.case-desc{color:var(--text-dim); font-size:14px; max-width:60ch;}
.case-metric{text-align:right; min-width:110px; display:flex; flex-direction:column; justify-content:center; align-items:flex-end;}
.metric-num{font-family:var(--mono); font-size:24px; font-weight:700; color:var(--tab, var(--itsm));}
.metric-label{font-family:var(--mono); font-size:10px; color:var(--text-faint); letter-spacing:0.05em; text-align:right; margin-top:4px;}
@media (max-width:640px){
  .case-card{grid-template-columns:1fr;}
  .case-metric{align-items:flex-start; text-align:left;}
  .metric-label{text-align:left;}
}

/* ---------- methodology stepper ---------- */
.stepper{display:flex; flex-direction:column;}
.step{display:grid; grid-template-columns:56px 1fr; gap:20px; position:relative; padding-bottom:36px;}
.step:last-child{padding-bottom:0;}
.step-num{
  font-family:var(--mono); font-size:13px; font-weight:700; color:#fff;
  background:var(--itsm); width:36px; height:36px; border-radius:50%;
  display:flex; align-items:center; justify-content:center; z-index:2;
}
.step-line{
  position:absolute; left:17px; top:36px; bottom:0; width:2px; background:var(--line);
}
.step:last-child .step-line{display:none;}
.step-title{font-weight:600; font-size:16px; margin-bottom:6px;}
.step-desc{color:var(--text-dim); font-size:14px; max-width:56ch;}

/* horizontal variant for wider screens */
@media (min-width:860px){
  .stepper.horizontal{flex-direction:row; gap:0;}
  .stepper.horizontal .step{grid-template-columns:1fr; text-align:center; padding:0 14px;}
  .stepper.horizontal .step-num{margin:0 auto 14px;}
  .stepper.horizontal .step-line{top:18px; left:calc(50% + 30px); right:calc(-50% + 30px); bottom:auto; height:2px; width:auto;}
  .stepper.horizontal .step-desc{max-width:none; font-size:12.5px;}
}

/* ---------- KPI cards ---------- */
.kpi-grid{display:grid; grid-template-columns:repeat(auto-fit, minmax(200px,1fr)); gap:1px; background:var(--line); border:1px solid var(--line);}
.kpi-cell{background:var(--surface); padding:24px;}
.kpi-num{font-family:var(--mono); font-size:30px; font-weight:700; color:var(--itsm); margin-bottom:6px;}
.kpi-label{font-family:var(--mono); font-size:11.5px; color:var(--text-faint); letter-spacing:0.04em;}

/* ---------- doc layout (case study) ---------- */
.doc-layout{display:grid; grid-template-columns:220px 1fr; gap:48px; align-items:start;}
.doc-toc{position:sticky; top:80px; font-family:var(--mono); font-size:12px;}
.doc-toc-title{color:var(--text-faint); letter-spacing:0.08em; text-transform:uppercase; margin-bottom:14px; font-size:11px;}
.doc-toc a{display:block; padding:6px 0; color:var(--text-dim); text-decoration:none; border-left:2px solid transparent; padding-left:10px; transition:color .15s, border-color .15s;}
.doc-toc a:hover{color:var(--text); border-color:var(--itsm);}
.doc-section{padding:34px 0; border-bottom:1px solid var(--line);}
.doc-section:first-child{padding-top:0;}
.doc-section:last-child{border-bottom:none;}
.doc-num{font-family:var(--mono); font-size:11px; color:var(--itsm); letter-spacing:0.08em; margin-bottom:8px;}
.doc-h{font-size:21px; font-weight:600; margin-bottom:16px;}
.doc-section p{color:var(--text-dim); margin-bottom:14px; max-width:70ch;}
.doc-section p strong{color:var(--text);}
.doc-section ul{color:var(--text-dim); margin:0 0 14px 20px;}
.doc-section li{margin-bottom:6px;}
.finding-box{
  background:var(--surface); border:1px solid var(--line); border-left:3px solid var(--itsm);
  padding:16px 20px; margin:16px 0; border-radius:2px;
}
.finding-box .flabel{font-family:var(--mono); font-size:10.5px; color:var(--itsm); letter-spacing:0.06em; margin-bottom:6px;}
.chart-card{background:#171f27; border:1px solid #2b3846; border-radius:2px; padding:12px; margin:18px 0;}
.chart-grid{display:grid; grid-template-columns:1fr 1fr; gap:18px;}
@media (max-width:760px){
  .doc-layout{grid-template-columns:1fr;}
  .doc-toc{position:static; display:flex; flex-wrap:wrap; gap:4px 16px; padding-bottom:20px; border-bottom:1px solid var(--line); margin-bottom:8px;}
  .doc-toc-title{width:100%;}
  .chart-grid{grid-template-columns:1fr;}
}
table.data-table{width:100%; border-collapse:collapse; font-family:var(--mono); font-size:12.5px; margin:14px 0;}
table.data-table th, table.data-table td{padding:9px 12px; border-bottom:1px solid var(--line); text-align:left;}
table.data-table th{color:var(--text-faint); font-weight:500; letter-spacing:0.04em; text-transform:uppercase; font-size:10.5px;}
table.data-table td{color:var(--text-dim);}
table.data-table td.hl{color:var(--text); font-weight:600;}

.tag{font-family:var(--mono); font-size:11px; color:var(--text-dim); background:var(--surface-2); border:1px solid var(--line); padding:4px 9px; border-radius:2px;}
.tags-row{display:flex; flex-wrap:wrap; gap:8px;}

.callout{
  background:var(--surface-2); border:1px solid var(--line); border-radius:2px;
  padding:18px 20px; font-family:var(--mono); font-size:12.5px; color:var(--text-dim);
}

footer.site-footer{padding:32px 0; text-align:center; font-family:var(--mono); font-size:11.5px; color:var(--text-faint); border-top:1px solid var(--line);}

::selection{background:var(--itsm); color:#fff;}
a:focus-visible, button:focus-visible{outline:2px solid var(--itsm); outline-offset:2px;}

/* ---------- warm ambient glow (behind hero-type headers) ---------- */
.warm-glow{position:relative; isolation:isolate;}
.warm-glow::before{
  content:''; position:absolute; top:-120px; right:-140px; width:420px; height:420px;
  background:radial-gradient(circle, color-mix(in srgb, var(--warm-glow) 22%, transparent) 0%, transparent 70%);
  z-index:-1; pointer-events:none;
}

/* ---------- photo gallery (About page) ---------- */
.gallery-grid{display:grid; grid-template-columns:1fr 1fr; gap:18px;}
.gallery-card{
  background:var(--surface); border:1px solid var(--line); border-radius:3px; overflow:hidden;
  transition:transform .2s, border-color .2s;
}
.gallery-card:hover{transform:translateY(-3px); border-color:#39485a;}
.gallery-card img{width:100%; height:260px; object-fit:cover; object-position:center 20%; display:block;}
.gallery-cap{padding:14px 16px;}
.gallery-cap .g-title{font-family:var(--mono); font-size:12.5px; font-weight:600; color:var(--text); margin-bottom:3px;}
.gallery-cap .g-sub{font-family:var(--mono); font-size:11px; color:var(--text-faint);}
@media (max-width:600px){.gallery-grid{grid-template-columns:1fr;} .gallery-card img{height:220px;}}

/* ---------- fun-facts strip ---------- */
.funfacts{display:flex; flex-wrap:wrap; gap:14px;}
.funfact{
  flex:1 1 190px; background:var(--surface); border:1px solid var(--line); border-radius:3px;
  padding:18px 18px 16px; transition:transform .18s ease, border-color .18s ease;
}
.funfact:hover{transform:translateY(-3px) rotate(-0.6deg); border-color:var(--fc, var(--itsm));}
.funfact .f-icon{font-size:22px; margin-bottom:10px; display:block;}
.funfact .f-title{font-family:var(--mono); font-size:12.5px; font-weight:600; color:var(--text); margin-bottom:4px;}
.funfact .f-sub{color:var(--text-dim); font-size:12.5px; line-height:1.5;}

/* ---------- reveal-on-scroll animation ---------- */
.reveal{opacity:0; transform:translateY(22px); transition:opacity .6s ease, transform .6s ease;}
.reveal.is-visible{opacity:1; transform:translateY(0);}
.reveal-stagger > *{opacity:0; transform:translateY(18px); transition:opacity .5s ease, transform .5s ease;}
.reveal-stagger.is-visible > *{opacity:1; transform:translateY(0);}
@media (prefers-reduced-motion: reduce){
  .reveal, .reveal-stagger > *{opacity:1; transform:none; transition:none;}
}

/* ---------- button micro-interaction ---------- */
.btn{transform:translateY(0);}
.btn:hover{transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.btn-primary:hover{box-shadow:0 6px 18px -6px color-mix(in srgb, var(--itsm) 55%, transparent);}