/* =========================================================
   Intakhab Alam — Chartered HSE Director
   Design language: petroleum-blue authority + safety-amber
   signal + engineering monospace. Grounded in the visual
   vernacular of industrial HSE (permits, signage, readouts).
   ========================================================= */

:root{
  /* Surfaces */
  --ink:#0B1B24;          /* petroleum blue-black — primary dark */
  --ink-2:#102A38;        /* raised dark surface */
  --ink-3:#071119;        /* deepest — footer */
  --paper:#F4F1E9;        /* warm paper */
  --paper-2:#E9E4D8;      /* raised paper */

  /* Signal */
  --hazard:#F4A81D;       /* safety amber — accent on dark */
  --hazard-soft:#F7BE52;
  --hazard-deep:#8F5E00;  /* amber text on light (AA on paper) */
  --safe:#2E9E86;         /* zero-harm / go state */

  /* Support */
  --steel:#5E7486;
  --steel-light:#9DAFBC;

  /* Lines */
  --line:#25404E;         /* hairline on dark */
  --line-light:#D5CFBF;   /* hairline on light */

  /* Type */
  --serif:"Newsreader",Georgia,serif;
  --sans:"Archivo",system-ui,-apple-system,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;

  /* Rhythm */
  --gutter:clamp(20px,5vw,32px);
  --maxw:1180px;
  --sec-y:clamp(72px,11vw,132px);
  --radius:3px;

  --ease:cubic-bezier(.2,.7,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit}
::selection{background:var(--hazard);color:var(--ink)}

/* Accessible focus */
:focus-visible{outline:2px solid var(--hazard);outline-offset:3px}
.skip{position:absolute;left:-9999px;top:10px;z-index:200;background:var(--hazard);color:var(--ink);padding:12px 18px;font-weight:700;border-radius:var(--radius)}
.skip:focus{left:12px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter)}

/* ---- Shared type devices ---------------------------------- */
.eyebrow{
  font-family:var(--mono);
  font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--hazard-deep);
  display:inline-flex;align-items:center;gap:12px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--hazard-deep)}
.on-dark .eyebrow,.eyebrow.on-dark{color:var(--hazard)}
.on-dark .eyebrow::before,.eyebrow.on-dark::before{background:var(--hazard)}

.title{
  font-family:var(--serif);font-weight:500;
  font-size:clamp(2rem,4vw,3.05rem);line-height:1.08;
  letter-spacing:-.022em;max-width:24ch;
}
.title em{font-style:italic;color:var(--hazard-deep)}
.on-dark .title em{color:var(--hazard)}
.intro{font-size:clamp(1.02rem,1.5vw,1.12rem);color:var(--steel);max-width:62ch;margin-top:18px}
.on-dark .intro{color:var(--steel-light)}

/* Buttons */
.btn{
  --bg:var(--hazard);--fg:var(--ink);
  display:inline-flex;align-items:center;gap:10px;
  min-height:52px;padding:0 24px;border:1px solid transparent;border-radius:var(--radius);
  font-weight:700;font-size:.92rem;letter-spacing:.01em;text-decoration:none;cursor:pointer;
  transition:transform .22s var(--ease),background .22s,color .22s,border-color .22s,box-shadow .22s;
  background:var(--bg);color:var(--fg);
}
.btn svg{width:16px;height:16px;flex:none}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px -8px rgba(244,168,29,.6)}
.btn-ghost{background:transparent;color:currentColor;border-color:var(--line)}
.on-light .btn-ghost{border-color:var(--line-light)}
.btn-ghost:hover{border-color:var(--hazard);color:var(--hazard-deep);transform:translateY(-2px)}
.on-dark .btn-ghost:hover{color:var(--hazard)}

/* Reveal on scroll */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* =========================================================
   NAV
   ========================================================= */
.nav{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(11,27,36,.82);backdrop-filter:blur(14px) saturate(1.1);border-bottom:1px solid var(--line);transition:background .3s}
.nav-inner{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--gutter);height:70px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px;color:var(--paper);text-decoration:none;font-weight:800;letter-spacing:-.01em;font-size:1.05rem}
.brand .mark{position:relative;width:30px;height:30px;flex:none;background:var(--hazard);clip-path:polygon(50% 4%,96% 96%,4% 96%)}
.brand .mark::after{content:"!";position:absolute;top:56%;left:50%;transform:translate(-50%,-50%);color:var(--ink);font-weight:900;font-size:.82rem}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{color:var(--steel-light);text-decoration:none;font-size:.85rem;font-weight:500;letter-spacing:.01em;transition:color .2s}
.nav-links a:hover,.nav-links a:focus-visible{color:var(--hazard)}
.nav-cta{background:var(--hazard);color:var(--ink)!important;padding:9px 16px;border-radius:var(--radius);font-weight:700}
.nav-cta:hover{background:var(--paper)!important}
.nav-toggle{display:none;background:none;border:0;color:var(--paper);cursor:pointer;padding:8px}

/* =========================================================
   HERO
   ========================================================= */
.hero{background:var(--ink);color:var(--paper);padding:calc(70px + clamp(52px,9vw,104px)) 0 clamp(56px,8vw,92px);position:relative;overflow:hidden}
/* faint hazard-stripe field, upper right */
.hero::before{content:"";position:absolute;top:0;right:-6%;width:44%;height:100%;background:repeating-linear-gradient(-45deg,transparent 0 48px,rgba(244,168,29,.04) 48px 96px);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.32fr .88fr;gap:clamp(40px,6vw,64px);align-items:center;position:relative}
.hero h1{font-family:var(--serif);font-weight:500;font-size:clamp(2.5rem,5vw,4.3rem);line-height:1.04;letter-spacing:-.028em;margin-bottom:6px}
.hero h1 em{font-style:italic;color:var(--hazard)}
.hero-sub{font-size:clamp(1rem,1.5vw,1.18rem);color:var(--steel-light);margin:22px 0 34px;line-height:1.65;max-width:56ch}
.hero-sub strong{color:var(--paper);font-weight:600}
.availability{border-left:2px solid var(--hazard);padding-left:16px;margin:0 0 30px;color:#cfd8dc;font-size:.95rem;max-width:52ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}

/* Portrait */
.hero-photo{position:relative;max-width:400px;justify-self:end;width:100%}
.photo-frame{position:relative;border:1px solid var(--line);padding:12px;background:var(--ink-2)}
.photo-frame img{width:100%;height:auto;filter:grayscale(.12) contrast(1.05)}
.photo-corner{position:absolute;top:-9px;right:-9px;width:36px;height:36px;border-top:2px solid var(--hazard);border-right:2px solid var(--hazard)}
.photo-tag{position:absolute;left:12px;right:12px;bottom:-15px;background:var(--hazard);color:var(--ink);padding:10px 14px;text-align:center;font-family:var(--mono);font-size:.7rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase}

/* Stat readout bar */
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:clamp(52px,7vw,76px);position:relative}
.hstat{background:var(--ink);padding:26px 24px}
.hstat .n{font-family:var(--serif);font-weight:600;font-size:clamp(2rem,3.2vw,2.5rem);line-height:1;letter-spacing:-.02em;color:var(--hazard)}
.hstat .l{font-size:.76rem;color:var(--steel-light);margin-top:9px;line-height:1.4}
.hstat .l small{color:var(--steel);font-size:.68rem}

/* =========================================================
   MATRIX — the full-spectrum thesis (signature)
   ========================================================= */
.matrix-sec{background:var(--paper-2)}
.section{padding-block:var(--sec-y)}
.matrix{margin-top:44px;border:1px solid var(--line-light);background:var(--paper);overflow-x:auto}
.matrix table{width:100%;border-collapse:collapse;min-width:660px}
.matrix th,.matrix td{border:1px solid var(--line-light);text-align:center}
.matrix thead th{background:var(--ink);color:var(--paper);font-family:var(--mono);font-weight:500;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;padding:16px 12px}
.matrix thead th:first-child{background:var(--ink-2);text-align:left;padding-left:22px}
.matrix tbody th{background:var(--paper-2);text-align:left;padding:18px 22px;font-weight:700;font-size:.94rem;white-space:nowrap}
.matrix tbody th span{display:block;font-family:var(--mono);font-weight:400;font-size:.66rem;color:var(--steel);text-transform:uppercase;letter-spacing:.07em;margin-top:4px}
.cell{padding:18px 12px;font-size:.82rem;line-height:1.4;color:var(--steel);position:relative}
.cell.hit{background:rgba(244,168,29,.12);color:var(--ink);font-weight:600}
.cell.hit .dot{display:inline-block;width:7px;height:7px;background:var(--hazard-deep);border-radius:50%;margin-bottom:6px;transform:scale(0);transition:transform .5s var(--ease)}
.matrix.in .cell.hit .dot{transform:scale(1)}
.cell.hit .pn{display:block;font-family:var(--mono);font-size:.67rem;color:var(--hazard-deep);font-weight:600;margin-top:4px;letter-spacing:.02em}
.matrix-note{margin-top:16px;font-family:var(--mono);font-size:.74rem;color:var(--steel)}
.matrix-note b{color:var(--hazard-deep)}

/* =========================================================
   PROJECTS
   ========================================================= */
.proj-sec{background:var(--ink);color:var(--paper)}
.projects{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:48px;background:var(--line);border:1px solid var(--line)}
.proj{background:var(--ink);padding:32px 30px;transition:background .3s}
.proj:hover{background:var(--ink-2)}
.proj-top{display:flex;justify-content:space-between;align-items:flex-start;gap:14px;margin-bottom:14px}
.proj-val{font-family:var(--serif);font-weight:600;font-size:1.75rem;line-height:1;letter-spacing:-.02em;color:var(--hazard);white-space:nowrap}
.tag{font-family:var(--mono);font-size:.64rem;letter-spacing:.1em;text-transform:uppercase;font-weight:600;padding:5px 9px;border-radius:2px;white-space:nowrap;color:var(--ink)}
.tag.pmc{background:var(--hazard)}
.tag.epc{background:var(--safe);color:var(--paper)}
.tag.client{background:var(--steel-light)}
.proj h3{font-size:1.14rem;font-weight:700;letter-spacing:-.01em;margin-bottom:8px}
.proj p{font-size:.86rem;color:var(--steel-light);line-height:1.55}
.proj .meta{font-family:var(--mono);font-size:.7rem;color:var(--steel);margin-top:14px;letter-spacing:.02em}

/* =========================================================
   DIFFERENTIATOR band
   ========================================================= */
.diff{background:var(--hazard);color:var(--ink);padding-block:clamp(56px,8vw,80px);position:relative;overflow:hidden}
.diff::before{content:"";position:absolute;inset:0;background:repeating-linear-gradient(-45deg,transparent 0 60px,rgba(11,27,36,.045) 60px 120px);pointer-events:none}
.diff-inner{display:grid;grid-template-columns:auto 1fr;gap:clamp(28px,5vw,52px);align-items:center;position:relative}
.diff-mark{font-family:var(--serif);font-weight:600;font-size:clamp(3.6rem,8vw,6rem);line-height:.82;letter-spacing:-.04em}
.diff h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.5rem,2.8vw,2.1rem);line-height:1.18;letter-spacing:-.01em;margin-bottom:12px}
.diff p{font-size:1.02rem;line-height:1.62;max-width:60ch;color:#3c2e07}

/* =========================================================
   REGIONS
   ========================================================= */
.regions{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:48px}
.region{background:var(--paper);border:1px solid var(--line-light);padding:28px 24px;transition:transform .25s var(--ease),box-shadow .25s,border-color .25s}
.region:hover{transform:translateY(-5px);box-shadow:0 18px 40px -18px rgba(11,27,36,.28);border-color:var(--hazard)}
.region .flag{font-family:var(--mono);font-size:.7rem;letter-spacing:.12em;text-transform:uppercase;color:var(--hazard-deep);margin-bottom:10px}
.region h3{font-size:1.16rem;font-weight:700;letter-spacing:-.01em;margin-bottom:14px}
.region ul{list-style:none}
.region li{font-size:.84rem;color:var(--steel);padding:5px 0 5px 16px;position:relative;line-height:1.45}
.region li::before{content:"";position:absolute;left:0;top:12px;width:5px;height:5px;background:var(--hazard);transform:rotate(45deg)}

/* =========================================================
   TIMELINE
   ========================================================= */
.tl-sec{background:var(--paper)}
.timeline{margin-top:48px;position:relative}
.timeline::before{content:"";position:absolute;left:142px;top:8px;bottom:8px;width:1px;background:var(--line-light)}
.tl-item{display:grid;grid-template-columns:142px 1fr;gap:30px;padding:22px 0;border-bottom:1px solid var(--line-light);position:relative}
.tl-item:last-child{border-bottom:0}
.tl-item::before{content:"";position:absolute;left:138px;top:29px;width:9px;height:9px;border-radius:50%;background:var(--hazard);border:2px solid var(--paper);z-index:1;transition:transform .25s}
.tl-item:hover::before{transform:scale(1.4)}
.tl-date{font-family:var(--mono);font-size:.73rem;color:var(--steel);padding-top:3px;line-height:1.5}
.tl-body h4{font-size:1.02rem;font-weight:700;margin-bottom:4px;display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.tl-body .org{font-size:.86rem;color:var(--hazard-deep);font-weight:600;margin-bottom:7px}
.tl-body p{font-size:.85rem;color:var(--steel);line-height:1.55}
.tl-model{font-family:var(--mono);font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;padding:2px 8px;border-radius:2px;font-weight:700}
.tl-model.pmc{background:rgba(244,168,29,.2);color:var(--hazard-deep)}
.tl-model.epc{background:rgba(46,158,134,.18);color:var(--safe)}
.tl-model.client{background:rgba(94,116,134,.2);color:var(--steel)}
.tl-more{margin-top:22px}
.tl-more summary{cursor:pointer;font-weight:700;font-size:.9rem;color:var(--hazard-deep);font-family:var(--mono);letter-spacing:.04em;list-style:none;display:inline-flex;align-items:center;gap:8px;padding:6px 0}
.tl-more summary::-webkit-details-marker{display:none}
.tl-more summary::before{content:"+";font-size:1.1rem;line-height:1}
.tl-more[open] summary::before{content:"–"}
.tl-more[open] summary{margin-bottom:8px}

/* =========================================================
   CREDENTIALS
   ========================================================= */
.cred-sec{background:var(--paper-2)}
.badge-row{display:flex;gap:28px;align-items:center;flex-wrap:wrap;margin:44px 0 52px;padding:30px 32px;background:var(--paper);border:1px solid var(--line-light)}
.badge-row img{height:60px;width:auto;object-fit:contain;filter:grayscale(1);opacity:.7;transition:filter .3s,opacity .3s}
.badge-row:hover img{filter:none;opacity:1}
.creds{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}
.cred-col h3{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;color:var(--hazard-deep);margin-bottom:18px;padding-bottom:12px;border-bottom:1px solid var(--line-light)}
.cred-list{list-style:none}
.cred-list li{display:flex;gap:16px;padding:12px 0;font-size:.92rem;border-bottom:1px solid var(--line-light);align-items:baseline}
.cred-list li:last-child{border-bottom:0}
.cred-list .code{font-family:var(--mono);font-size:.72rem;color:var(--hazard-deep);font-weight:600;flex:none;width:64px}
.cred-list .txt{color:var(--ink);font-weight:500}
.cred-list .txt span{display:block;font-size:.78rem;color:var(--steel);font-weight:400;margin-top:2px}
.cv-banner{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;background:var(--ink-2);border:1px solid var(--line);padding:38px 42px;margin-top:52px}
.cv-banner h3{font-family:var(--serif);font-weight:600;font-size:1.5rem;color:var(--paper);margin-bottom:6px}
.cv-banner p{color:var(--steel-light);font-size:.92rem;max-width:46ch}

/* =========================================================
   CONTACT
   ========================================================= */
.contact{background:var(--ink);color:var(--paper);text-align:center;padding-block:clamp(72px,10vw,110px)}
.contact .eyebrow{justify-content:center}
.contact h2{font-family:var(--serif);font-weight:500;font-size:clamp(2rem,4vw,3.1rem);letter-spacing:-.022em;line-height:1.1;margin-bottom:18px;max-width:22ch;margin-inline:auto}
.contact p{color:var(--steel-light);max-width:52ch;margin:0 auto 36px;font-size:1.02rem}
.contact-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.contact-info{margin-top:46px;display:flex;gap:34px;justify-content:center;flex-wrap:wrap;font-family:var(--mono);font-size:.8rem;color:var(--steel-light)}
.contact-info a{color:var(--steel-light);text-decoration:none;transition:color .2s}
.contact-info a:hover{color:var(--hazard)}

/* =========================================================
   FOOTER
   ========================================================= */
footer{background:var(--ink-3);color:var(--steel);padding-block:30px;font-size:.78rem}
.foot-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr}
  .hero-photo{max-width:320px;margin:0 auto;justify-self:center}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .hstat:nth-child(2){border-right:0}
  .projects{grid-template-columns:1fr}
  .regions{grid-template-columns:repeat(2,1fr)}
  .creds{grid-template-columns:1fr;gap:36px}
  .diff-inner{grid-template-columns:1fr;gap:18px}
  .timeline::before{left:100px}
  .tl-item{grid-template-columns:100px 1fr;gap:20px}
  .tl-item::before{left:96px}
}
@media(max-width:640px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;background:var(--ink);padding:16px var(--gutter) 22px;border-bottom:1px solid var(--line)}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 0}
  .nav-cta{text-align:center}
  .hero-stats{grid-template-columns:1fr 1fr}
  .regions{grid-template-columns:1fr}
  .contact-info{flex-direction:column;gap:16px}
  .badge-row{justify-content:center;gap:22px}
  .badge-row img{height:48px}
  .cv-banner{flex-direction:column;text-align:center;padding:30px 24px}
  .timeline::before{display:none}
  .tl-item{grid-template-columns:1fr;gap:6px}
  .tl-item::before{display:none}
  .tl-date{padding-top:0}
  .btn{width:100%;justify-content:center}
  .hero-cta{flex-direction:column}
}

/* Motion / print */
@media(prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover,.region:hover{transform:none}
  .cell.hit .dot{transform:scale(1)}
}
@media print{
  .nav,.hero-cta,.contact-links,.cv-banner,.tl-more summary{display:none}
  .hero,.proj-sec,.contact{background:#fff;color:#000}
  *{color:#000!important;background:#fff!important}
}