/* Petroxin Ltd — site styles. Plain CSS, no build step. */

@font-face{font-family:"Jost";font-weight:500;font-style:normal;font-display:swap;src:url("../assets/fonts/jost-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"Jost";font-weight:600;font-style:normal;font-display:swap;src:url("../assets/fonts/jost-latin-600-normal.woff2") format("woff2")}
@font-face{font-family:"Jost";font-weight:700;font-style:normal;font-display:swap;src:url("../assets/fonts/jost-latin-700-normal.woff2") format("woff2")}
@font-face{font-family:"Public Sans";font-weight:400;font-style:normal;font-display:swap;src:url("../assets/fonts/public-sans-latin-400-normal.woff2") format("woff2")}
@font-face{font-family:"Public Sans";font-weight:500;font-style:normal;font-display:swap;src:url("../assets/fonts/public-sans-latin-500-normal.woff2") format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-weight:500;font-style:normal;font-display:swap;src:url("../assets/fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2")}

:root{
  /* Palette derived from the Petroxin logo: red swoosh, grey wordmark, gold flick */
  --ink:#0b0b0e; --ink-2:#131316; --ink-3:#1a1a1e; --panel:#202025; --line:rgba(242,239,233,.12);
  --ivory:#f2efe9; --ivory-2:#dedbd6; --slate:#a3a5aa;
  --red:#e03127; --red-light:#ff5a4f; --red-dim:rgba(224,49,39,.16);
  --gold:#f7a823; --gold-light:#ffc35a; --grey:#6d6e71;
  /* legacy aliases so the shared components keep working */
  --teal:var(--red); --teal-light:var(--gold); --teal-dim:var(--red-dim);
  --display:"Jost",system-ui,sans-serif; --text:"Public Sans",system-ui,sans-serif; --mono:"IBM Plex Mono",ui-monospace,monospace;
  --max:1180px; --gutter:clamp(20px,4vw,48px);
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--ink);color:var(--ivory-2);font-family:var(--text);font-size:17px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
h1,h2,h3,h4{font-family:var(--display);color:var(--ivory);line-height:1.1;margin:0 0 .5em;letter-spacing:.005em}
h1{font-size:clamp(2.4rem,5.4vw,4.4rem);font-weight:600;max-width:15ch}
h2{font-size:clamp(1.8rem,3.4vw,2.7rem);font-weight:600;max-width:22ch}
h3{font-size:1.3rem;font-weight:600}
h4{font-size:1.05rem;font-weight:600}
p{margin:0 0 1em;max-width:66ch}
a{color:var(--gold)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid var(--teal-light);outline-offset:3px}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gutter)}
section{position:relative;padding:clamp(72px,9vw,128px) 0}
.eyebrow{font-family:var(--display);text-transform:uppercase;letter-spacing:.22em;font-size:.74rem;color:var(--gold);margin-bottom:18px;font-weight:500}
.lede{font-size:1.15rem;color:var(--ivory);max-width:62ch}
.mono{font-family:var(--mono)}
.muted{color:var(--slate)}
.btn{display:inline-block;font-family:var(--display);font-weight:600;font-size:.95rem;letter-spacing:.04em;text-decoration:none;padding:14px 26px;border-radius:999px;border:1.5px solid var(--red);color:#fff;background:var(--red);position:relative;overflow:hidden;transition:color .3s var(--ease),background .3s var(--ease),transform .3s var(--ease)}
.btn:hover{background:var(--red-light);border-color:var(--red-light);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ivory);border-color:rgba(242,239,233,.45)}
.btn.ghost:hover{background:rgba(242,239,233,.08);border-color:var(--ivory)}
.link{color:var(--ivory);text-decoration:none;background:linear-gradient(var(--teal),var(--teal)) no-repeat 0 100%/0 1.5px;transition:background-size .4s var(--ease)}
.link:hover{background-size:100% 1.5px}
.grid{display:grid;gap:28px}
@media(min-width:820px){.grid-2{grid-template-columns:1fr 1fr}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}}

/* ---------- background layers ---------- */
#bg{position:fixed;inset:0;width:100vw;height:100vh;z-index:-2;display:block}
#bg.fallback{background:url("../assets/fluid-fallback.jpg") center/cover no-repeat}
.bg-fade{position:fixed;inset:0;z-index:-1;pointer-events:none;background:var(--ink);opacity:0;transition:opacity .2s linear}
.on-solid{background:var(--ink-2)}
.on-solid-3{background:var(--ink-3)}

/* ---------- reveals ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.rv.visible{opacity:1;transform:none}
.rv-stagger > *{opacity:0;transform:translateY(18px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv-stagger.visible > *{opacity:1;transform:none}
.rv-stagger.visible > *:nth-child(2){transition-delay:.1s}
.rv-stagger.visible > *:nth-child(3){transition-delay:.2s}
.rv-stagger.visible > *:nth-child(4){transition-delay:.3s}
.rv-stagger.visible > *:nth-child(5){transition-delay:.4s}
.rv-stagger.visible > *:nth-child(6){transition-delay:.5s}
.rv-stagger.visible > *:nth-child(7){transition-delay:.6s}
.rv-stagger.visible > *:nth-child(8){transition-delay:.7s}
.no-js .rv,.no-js .rv-stagger > *{opacity:1;transform:none}

/* ---------- header ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:30;transition:background .4s,backdrop-filter .4s,border-color .4s;border-bottom:1px solid transparent}
.site-header.scrolled{background:rgba(5,10,15,.78);backdrop-filter:blur(12px);border-color:var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:78px;gap:24px}
.logo img{height:58px;width:auto;display:block}
.nav ul{list-style:none;display:flex;gap:28px;margin:0;padding:0}
.nav a{font-family:var(--display);font-weight:500;font-size:.9rem;letter-spacing:.06em;color:var(--ivory);text-decoration:none;padding:6px 0;background:linear-gradient(var(--teal),var(--teal)) no-repeat 0 100%/0 1.5px;transition:background-size .35s var(--ease),color .3s}
.nav a:hover,.nav a.active{background-size:100% 1.5px;color:var(--gold)}
.nav-toggle{display:none;background:transparent;border:1px solid var(--line);color:var(--ivory);border-radius:999px;padding:8px 16px;font-family:var(--display);letter-spacing:.06em}
@media(max-width:900px){
  .nav{display:none;position:absolute;left:0;right:0;top:78px;background:rgba(5,10,15,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:16px var(--gutter) 24px}
  .nav.open{display:block}
  .nav ul{flex-direction:column;gap:16px}
  .nav-toggle{display:inline-block}
  .cta-top{display:none}
}

/* ---------- hero ---------- */
.hero{min-height:100vh;display:flex;align-items:center;padding:140px 0 80px}
.hero .wrap{width:100%}
.hero h1,.hero .eyebrow,.hero .lede,.hero .actions,.hero .stats{text-shadow:0 2px 24px rgba(0,0,0,.55)}
.hero h1 .line{display:block;overflow:hidden}
.hero h1 .line span{display:block;transform:translateY(110%);opacity:0}
.hero .eyebrow,.hero .lede,.hero .actions,.hero .stats{opacity:0;transform:translateY(14px)}
.hero.ready h1 .line span{animation:rise 1s var(--ease) forwards}
.hero.ready h1 .line:nth-child(2) span{animation-delay:.15s}
.hero.ready h1 .line:nth-child(3) span{animation-delay:.3s}
.hero.ready .eyebrow{animation:fade 1s var(--ease) forwards}
.hero.ready .lede{animation:fade 1s var(--ease) .55s forwards}
.hero.ready .actions{animation:fade 1s var(--ease) .75s forwards}
.hero.ready .stats{animation:fade 1s var(--ease) .95s forwards}
@keyframes rise{to{transform:none;opacity:1}}
@keyframes fade{to{opacity:1;transform:none}}
.no-js .hero h1 .line span,.no-js .hero .eyebrow,.no-js .hero .lede,.no-js .hero .actions,.no-js .hero .stats{opacity:1;transform:none}
.hero .lede{margin-top:22px;color:var(--ivory-2)}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}
.hero .stats{display:flex;gap:44px;flex-wrap:wrap;margin-top:64px;padding-top:26px;border-top:1px solid rgba(242,239,233,.22);width:fit-content}
.stat b{display:block;font-family:var(--mono);font-size:2rem;color:var(--gold-light);font-weight:500;line-height:1}
.stat span{font-size:.82rem;color:var(--slate);letter-spacing:.04em}
.scroll-cue{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);width:1px;height:56px;background:linear-gradient(var(--red),transparent);opacity:.8}
.scroll-cue::before{content:"";position:absolute;top:0;left:-1px;width:3px;height:14px;background:var(--gold);animation:cue 2.2s ease-in-out infinite}
@keyframes cue{0%{transform:translateY(0);opacity:1}100%{transform:translateY(46px);opacity:0}}

/* ---------- ticker ---------- */
.ticker{border-top:1px solid var(--line);border-bottom:1px solid var(--line);overflow:hidden;padding:14px 0;background:rgba(5,10,15,.35)}
.ticker .track{display:flex;gap:56px;width:max-content;animation:ticker 48s linear infinite;font-family:var(--display);letter-spacing:.22em;text-transform:uppercase;font-size:.78rem;color:var(--slate)}
.ticker .track span::after{content:"·";margin-left:56px;color:var(--red)}
@keyframes ticker{to{transform:translateX(-50%)}}

/* ---------- about ---------- */
.about .grid-2{align-items:start}
.regions{list-style:none;padding:0;margin:0}
.regions li{display:grid;grid-template-columns:1fr auto;gap:16px;border-bottom:1px solid var(--line);padding:12px 0;font-size:.96rem}
.regions li span:first-child{color:var(--ivory)}
.regions li span:last-child{color:var(--slate);text-align:right;font-size:.9rem}
.photo{border-radius:14px;overflow:hidden;position:relative}
.photo img{display:block;width:100%;height:100%;object-fit:cover;filter:saturate(.8) contrast(1.05)}
.photo::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(5,10,15,.75))}
.photo figcaption{position:absolute;left:20px;bottom:16px;right:20px;font-size:.85rem;color:var(--ivory-2);z-index:1}

/* ---------- globe ---------- */
.globe-wrap{position:relative;aspect-ratio:1/1;max-width:520px;margin:0 auto}
#globe{width:100%;height:100%;display:block;touch-action:none}
.globe-hint{font-family:var(--mono);font-size:.72rem;color:var(--slate);text-align:center;margin-top:8px}

/* ---------- services ---------- */
.svc-list{margin-top:48px;border-top:1px solid var(--line)}
.svc{border-bottom:1px solid var(--line)}
.svc-head{width:100%;display:grid;grid-template-columns:56px 1fr 40px;align-items:center;gap:18px;background:none;border:0;color:var(--ivory);text-align:left;padding:26px 0;cursor:pointer;font-family:var(--display)}
.svc-head .idx{font-family:var(--mono);color:var(--red);font-size:.85rem}
.svc-head .ttl{font-size:clamp(1.15rem,2vw,1.55rem);font-weight:600;transition:transform .35s var(--ease),color .3s}
.svc-head .ttl small{display:block;font-family:var(--text);font-weight:400;font-size:.88rem;color:var(--slate);margin-top:6px;letter-spacing:0}
.svc-head:hover .ttl{transform:translateX(10px);color:var(--gold)}
.svc-head .plus{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);position:relative;transition:transform .4s var(--ease),border-color .3s}
.svc-head .plus::before,.svc-head .plus::after{content:"";position:absolute;background:var(--ivory);left:50%;top:50%;transform:translate(-50%,-50%)}
.svc-head .plus::before{width:12px;height:1.5px}.svc-head .plus::after{width:1.5px;height:12px}
.svc[open] .svc-head .plus{transform:rotate(45deg);border-color:var(--teal)}
.svc[open] .svc-head .ttl{color:var(--gold)}
.svc-body{display:grid;grid-template-rows:0fr;transition:grid-template-rows .55s var(--ease)}
.svc[open] .svc-body{grid-template-rows:1fr}
.svc-body > div{overflow:hidden}
.svc-inner{padding:0 0 30px 74px;display:grid;gap:22px}
@media(min-width:820px){.svc-inner{grid-template-columns:1.2fr 1fr}}
@media(max-width:640px){.svc-inner{padding-left:0}.svc-head{grid-template-columns:40px 1fr 34px}}
.svc-inner ul{margin:0;padding-left:18px}
.svc-inner li{margin-bottom:7px}
.svc-inner li::marker{color:var(--teal)}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.tags span{font-family:var(--mono);font-size:.74rem;color:var(--ivory-2);border:1px solid var(--line);padding:4px 10px;border-radius:999px}
.svc.flag{background:linear-gradient(90deg,rgba(224,49,39,.10),transparent 60%);margin:0 calc(-1 * var(--gutter));padding:0 var(--gutter);border-left:3px solid var(--teal)}
.svc.flag .idx{color:var(--gold)}
.flag-badge{font-family:var(--display);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--gold);margin-left:10px;vertical-align:middle}

/* ---------- approach: horizontal phases ---------- */
.phases{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding:8px 0 24px;margin-top:40px;scrollbar-width:thin;scrollbar-color:var(--teal) transparent}
.phase{flex:0 0 min(320px,82vw);scroll-snap-align:start;background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px 24px;position:relative;transition:transform .4s var(--ease),border-color .3s}
.phase:hover{transform:translateY(-6px);border-color:var(--teal)}
.phase .num{font-family:var(--mono);color:var(--teal);font-size:.8rem;margin-bottom:12px}
.phase.gate{border-color:rgba(247,168,35,.5)}
.phase.gate .num{color:var(--gold)}
.phase.loop{background:linear-gradient(135deg,rgba(224,49,39,.2),var(--panel));border-color:var(--red)}
.phase p{font-size:.95rem;color:var(--ivory-2)}
.phase .chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.phase .chips span{font-size:.72rem;font-family:var(--mono);color:var(--slate)}
.phases-hint{font-size:.8rem;color:var(--slate);letter-spacing:.1em;text-transform:uppercase;font-family:var(--display)}

/* ---------- track record ---------- */
.outcomes{display:grid;gap:18px;margin:40px 0 44px}
@media(min-width:820px){.outcomes{grid-template-columns:repeat(3,1fr)}}
.outcome{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;transition:transform .4s var(--ease),border-color .3s}
.outcome:hover{transform:translateY(-4px);border-color:var(--teal)}
.outcome b{display:block;font-family:var(--mono);font-size:2.1rem;color:var(--gold);font-weight:500;line-height:1;margin-bottom:10px}
.outcome span{font-size:.95rem;color:var(--ivory-2)}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 28px}
.filters button{background:transparent;border:1px solid var(--line);color:var(--ivory-2);border-radius:999px;padding:8px 16px;font-family:var(--display);font-size:.8rem;letter-spacing:.06em;cursor:pointer;display:flex;align-items:center;gap:8px;transition:border-color .3s,background .3s,color .3s}
.filters button i{width:10px;height:10px;border-radius:2px;display:inline-block;background:var(--c,var(--teal))}
.filters button:hover,.filters button[aria-pressed="true"]{border-color:var(--teal);background:var(--teal-dim);color:var(--ivory)}
.log{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.log > li{display:grid;grid-template-columns:120px 1fr;gap:22px;padding:26px 0 26px 26px;border-bottom:1px solid var(--line);position:relative;transition:opacity .4s,transform .4s var(--ease)}
.log > li::before{content:"";position:absolute;left:-2px;top:0;bottom:0;width:8px;background:var(--c,var(--slate));border-radius:0 3px 3px 0}
.log > li.hide{display:none}
.log .yrs{font-family:var(--mono);color:var(--ivory);font-size:.9rem;line-height:1.4}
.log .yrs small{display:block;font-family:var(--text);color:var(--slate);font-size:.76rem;margin-top:6px;letter-spacing:.02em}
.log h3{margin:0 0 4px;font-size:1.15rem}
.log .cl{color:var(--slate);font-size:.88rem;margin-bottom:10px}
.log ul{margin:0;padding-left:18px}
.log li li{margin-bottom:5px;font-size:.96rem}
.log li li::marker{color:var(--teal)}
@media(max-width:640px){.log > li{grid-template-columns:1fr;gap:8px;padding-left:16px}}
.c-uk{--c:#e03127}.c-no{--c:#f7a823}.c-na{--c:#ffc35a}.c-me{--c:#9fb0bb}.c-eu{--c:#4b5f6b}
.c-multi{--c:linear-gradient(#e03127,#f7a823,#a3a5aa)}
.log-note{font-size:.85rem;color:var(--slate);margin-top:24px}
.rig{margin:56px 0 0;border-radius:16px;overflow:hidden;position:relative;display:grid;background:var(--panel);border:1px solid var(--line)}
@media(min-width:820px){.rig{grid-template-columns:1.25fr 1fr}}
.rig img{width:100%;height:100%;object-fit:cover;object-position:left top;display:block;aspect-ratio:799/576;filter:saturate(.85)}
.rig figcaption{padding:32px;display:flex;flex-direction:column;justify-content:center;color:var(--ivory)}
.rig figcaption b{display:block;font-family:var(--display);font-size:1.3rem;font-weight:600;margin-bottom:6px}

/* ---------- R&D ---------- */
.rnd-grid{display:grid;gap:20px;margin-top:40px}
@media(min-width:820px){.rnd-grid{grid-template-columns:repeat(3,1fr)}}
.rnd{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;display:flex;flex-direction:column;transition:transform .4s var(--ease),border-color .3s}
.rnd:hover{transform:translateY(-6px);border-color:var(--teal)}
.rnd .fig{height:150px;border-radius:10px;margin-bottom:20px;background:var(--ink-2);display:flex;align-items:center;justify-content:center;overflow:hidden}
.rnd .fig{position:relative}
.rnd .fig img{width:100%;height:100%;object-fit:cover;filter:grayscale(1) contrast(1.05) brightness(1.25)}
.rnd .fig img.diagram{object-fit:contain;filter:invert(.92) hue-rotate(180deg) grayscale(1) brightness(1.05)}
.rnd .fig::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(224,49,39,.75),rgba(247,168,35,.55));mix-blend-mode:color;pointer-events:none}
.rnd .fig.plain::after{display:none}
.rnd{transform-style:preserve-3d;perspective:900px}
.rnd:hover .fig{transform:rotateX(3deg) rotateY(-4deg)}
.rnd .fig{transition:transform .5s var(--ease)}
.rnd .fig svg{width:100%;height:100%}
.rnd p{font-size:.95rem}
.rnd .meta{margin-top:auto;font-size:.82rem;color:var(--slate)}

/* ---------- why ---------- */
.why-grid > div{border-top:1px solid var(--red);padding-top:18px}
.why-grid h4{margin-bottom:8px}
.why-grid p{font-size:.95rem;color:var(--ivory-2)}

/* ---------- contact ---------- */
.contact{background:linear-gradient(180deg,var(--ink-3),var(--ink))}
.contact dl{display:grid;grid-template-columns:110px 1fr;gap:10px 16px;margin:0}
.contact dt{color:var(--gold);font-family:var(--display);font-size:.9rem;letter-spacing:.06em}
.contact dd{margin:0}
.contact dd a{color:var(--ivory);text-decoration:none}
.social{display:flex;gap:22px;flex-wrap:wrap;margin-top:24px}
form.enq{display:grid;gap:14px;margin-top:8px}
form.enq label{display:grid;gap:6px;font-size:.85rem;color:var(--slate);font-family:var(--display);letter-spacing:.06em}
form.enq input,form.enq textarea{background:rgba(242,239,233,.05);border:1px solid var(--line);border-radius:10px;color:var(--ivory);padding:12px 14px;font-family:var(--text);font-size:1rem}
form.enq textarea{min-height:130px;resize:vertical}
form.enq .row{display:grid;gap:14px}
@media(min-width:640px){form.enq .row{grid-template-columns:1fr 1fr}}
form.enq .msg{font-size:.85rem;color:var(--gold-light);min-height:1.2em}
footer{border-top:1px solid var(--line);padding:30px 0;font-size:.82rem;color:var(--slate)}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px 32px;justify-content:space-between}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv,.rv-stagger > *{opacity:1;transform:none}
  .hero h1 .line span,.hero .eyebrow,.hero .lede,.hero .actions,.hero .stats{opacity:1;transform:none}
  .ticker .track{animation:none}
}