/* Taqwin Engineering — design system v1 */
:root{
  --ink:#0B1220; --ink2:#111C2E; --navy:#13245A; --steel:#35618F; --sky:#9FB6D1;
  --copper:#C27A2E; --copper2:#E39A4B; --paper:#F5F7FA; --line:#E1E6EE; --line2:#243149;
  --text:#243040; --muted:#66738A; --white:#fff;
  --ff:'Inter',system-ui,-apple-system,'Segoe UI',Roboto,Arial,sans-serif;
  --fh:'Inter Tight','Inter',system-ui,-apple-system,'Segoe UI',Arial,sans-serif;
  --fm:'IBM Plex Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--ff);color:var(--text);font-size:17px;line-height:1.65;background:#fff}
img{max-width:100%;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--steel)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.mono{font-family:var(--fm);font-weight:500;letter-spacing:.14em;text-transform:uppercase;font-size:12px}
.eyebrow{font-family:var(--fm);font-weight:500;letter-spacing:.16em;text-transform:uppercase;font-size:12px;color:var(--copper)}
h1,h2,h3,h4{font-family:var(--fh);color:var(--navy);letter-spacing:-.015em;line-height:1.12}
h2{font-size:38px;font-weight:700;margin:12px 0 18px}
h3{font-size:21px;font-weight:700;margin:0 0 10px;line-height:1.3}
p+p{margin-top:14px}
.lead{font-size:20px;line-height:1.55;color:#3C4858}
.muted{color:var(--muted)}
.rule{width:56px;height:3px;background:var(--copper);margin:8px 0 26px}
.center{text-align:center}
.center .rule{margin-left:auto;margin-right:auto}

/* header */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:78px;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--navy)}
.brand img{height:44px;width:auto}
.brand .word{display:flex;flex-direction:column;line-height:1}
.brand .word b{font-family:var(--fh);font-weight:800;font-size:19px;letter-spacing:.2em}
.brand .word span{font-family:var(--fm);font-size:9.5px;letter-spacing:.32em;color:var(--muted);margin-top:4px}
.nav nav{display:flex;gap:28px;align-items:center}
.nav nav a{font-size:14.5px;font-weight:500;color:var(--text);padding:6px 0;border-bottom:2px solid transparent}
.nav nav a:hover,.nav nav a.on{color:var(--navy);border-bottom-color:var(--copper)}
.nav .cta{background:var(--navy);color:#fff;padding:11px 20px;border-radius:4px;font-weight:600;font-size:14px;border-bottom:none!important}
.nav .cta:hover{background:var(--steel);color:#fff}
#mtoggle{display:none;font-size:26px;background:none;border:none;color:var(--navy);cursor:pointer;line-height:1}

/* dark hero */
.hero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.hero:before{content:"";position:absolute;inset:0;opacity:.55;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px}
.hero .in{position:relative;display:grid;grid-template-columns:1.1fr .9fr;gap:64px;align-items:center;padding:104px 24px 96px}
.hero h1{color:#fff;font-size:56px;font-weight:700;letter-spacing:-.025em;line-height:1.06;margin:22px 0 24px}
.hero .lead{color:#C9D4E0;font-size:19.5px;max-width:600px}
.hero .thesis{margin-top:30px;padding-left:18px;border-left:3px solid var(--copper);font-family:var(--fh);font-size:22px;font-weight:600;color:#fff;letter-spacing:-.01em}
.hero .thesis small{display:block;font-family:var(--fm);font-weight:500;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sky);margin-top:6px}
.btns{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 26px;border-radius:4px;font-weight:600;font-size:15px;border:1px solid transparent;transition:.2s}
.btn.copper{background:var(--copper);color:#fff}
.btn.copper:hover{background:var(--copper2);color:#fff}
.btn.ghost{border-color:rgba(255,255,255,.4);color:#fff}
.btn.ghost:hover{border-color:#fff;color:#fff}
.btn.navy{background:var(--navy);color:#fff}
.btn.navy:hover{background:var(--steel);color:#fff}
.btn.line{border-color:var(--navy);color:var(--navy)}
.btn.line:hover{background:var(--navy);color:#fff}
.frame{position:relative;border:1px solid rgba(255,255,255,.14);background:#0F1A2B;padding:10px;border-radius:6px}
.frame>img{border-radius:3px;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}
.frame figcaption{display:flex;justify-content:space-between;gap:12px;padding:12px 4px 2px;font-family:var(--fm);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--sky)}
.frame figcaption span:last-child{color:var(--copper2)}

/* fact strip */
.facts{background:var(--navy);color:#fff}
.facts .in{display:grid;grid-template-columns:repeat(4,1fr)}
.fact{padding:30px 28px;border-left:1px solid rgba(255,255,255,.12)}
.fact:first-child{border-left:none;padding-left:0}
.fact b{display:block;font-family:var(--fh);font-size:30px;font-weight:700;letter-spacing:-.02em;line-height:1.05}
.fact span{display:block;margin-top:6px;font-size:14px;color:#B9C7DA}

/* sections */
section{padding:92px 0}
section.alt{background:var(--paper)}
section.dark{background:var(--ink);color:#C9D4E0}
section.dark h2,section.dark h3{color:#fff}
section.dark .eyebrow{color:var(--copper2)}
.head{max-width:760px;margin-bottom:46px}
.head p{color:#4A5668}
section.dark .head p{color:#B9C7DA}
.grid{display:grid;gap:26px}
.g2{grid-template-columns:1fr 1fr}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split>img{border-radius:6px;width:100%;height:auto;aspect-ratio:4/3;object-fit:cover}

/* cards */
.card{background:#fff;border:1px solid var(--line);border-radius:6px;padding:30px 28px 28px;position:relative;transition:.25s}
.card:before{content:"";position:absolute;left:28px;right:28px;top:0;height:3px;background:var(--line);transition:.25s}
.card:hover{border-color:#CBD5E3;box-shadow:0 14px 40px rgba(19,36,90,.08);transform:translateY(-2px)}
.card:hover:before{background:var(--copper)}
.card .idx{font-family:var(--fm);font-size:12px;letter-spacing:.14em;color:var(--copper);margin-bottom:16px}
.card h3{margin-bottom:10px}
.card p{font-size:15.5px;color:#4A5668}
.card ul{list-style:none;margin:14px 0 18px}
.card li{position:relative;padding:5px 0 5px 20px;font-size:15px;color:#3C4858}
.card li:before{content:"";position:absolute;left:0;top:14px;width:8px;height:8px;background:var(--copper);border-radius:1px}
.more{font-weight:600;font-size:14.5px;color:var(--navy)}
.more:after{content:" \2192";}
section.dark .card{background:var(--ink2);border-color:var(--line2);color:#C9D4E0}
section.dark .card p,section.dark .card li{color:#B9C7DA}
section.dark .card:before{background:var(--line2)}
section.dark .more{color:var(--copper2)}

/* thesis columns */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}
.cols3 h3{font-size:19px}
.cols3 .k{font-family:var(--fm);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--copper);margin-bottom:10px}
.cols3 p{font-size:16px;color:#4A5668}

/* platform model */
.model{display:grid;grid-template-columns:1fr 54px 1.3fr 54px 1fr;align-items:stretch;gap:0}
.node{border:1px solid var(--line2);background:var(--ink2);border-radius:6px;padding:26px 24px}
.node.core{border-color:var(--copper);background:linear-gradient(180deg,#152A5E,#13245A)}
.node .k{font-family:var(--fm);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--sky);margin-bottom:10px}
.node.core .k{color:var(--copper2)}
.node h3{font-size:19px;color:#fff;margin-bottom:10px}
.node p{font-size:14.5px;color:#B9C7DA}
.node ul{list-style:none;margin-top:12px}
.node li{font-size:14px;color:#DCE4EE;padding:4px 0 4px 16px;position:relative}
.node li:before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;background:var(--copper);}
.arrow{display:flex;align-items:center;justify-content:center;color:var(--copper2);font-size:26px}
.model-base{margin-top:0;display:grid;grid-template-columns:1fr;justify-items:center}
.vline{width:2px;height:40px;background:var(--copper)}
.node.base{width:100%;text-align:center;border-style:dashed}
.node.base h3{font-size:17px}

/* projects list */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:6px;background:#fff}
table{width:100%;border-collapse:collapse;font-size:15px;min-width:760px}
th{font-family:var(--fm);font-weight:500;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);background:var(--paper)}
td{padding:16px 18px;border-bottom:1px solid var(--line);vertical-align:top;color:#3C4858}
tr:last-child td{border-bottom:none}
td:first-child{font-weight:600;color:var(--navy)}
.tag{display:inline-block;font-family:var(--fm);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:4px 9px;border-radius:3px;border:1px solid var(--line);color:var(--muted);white-space:nowrap}
.tag.tq{border-color:var(--copper);color:var(--copper)}
.tag.gf{border-color:#7FB69A;color:#2E7A52}
.tag.hk{border-color:#8FB1D9;color:#2B5C93}
.tag.sp{border-color:#8FCFA8;color:#1E7D45}
.legend{display:flex;gap:14px;flex-wrap:wrap;margin:18px 0 0;font-size:13.5px;color:var(--muted)}

/* work cards */
.work{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.wk{border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;display:flex;flex-direction:column}
.wk>img{aspect-ratio:16/10;object-fit:cover;width:100%;height:auto}
.wk .b{padding:22px 24px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.wk h3{font-size:18px}
.wk p{font-size:15px;color:#4A5668}
.wk .meta{font-family:var(--fm);font-size:11.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}

/* partners */
.plogos{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.pl{background:#fff;border:1px solid var(--line);border-radius:6px;padding:28px}
.pl .lg{height:64px;display:flex;align-items:center;margin-bottom:18px}
.pl .lg img{max-height:52px;width:auto;height:auto;max-width:220px}
.pl h3{font-size:18px}
.pl .k{font-family:var(--fm);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--copper);margin-bottom:8px}
.pl p{font-size:15px;color:#4A5668}
.pl ul{list-style:none;margin-top:12px}
.pl li{font-size:14.5px;padding:4px 0 4px 18px;position:relative;color:#3C4858}
.pl li:before{content:"";position:absolute;left:0;top:12px;width:7px;height:7px;background:var(--copper)}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:s}
.steps.steps5{grid-template-columns:repeat(5,1fr)}
.step{background:#fff;border:1px solid var(--line);border-radius:6px;padding:26px 24px}
.step .n{font-family:var(--fm);font-size:12px;letter-spacing:.14em;color:var(--copper);margin-bottom:12px}
.step h3{font-size:17.5px}
.step p{font-size:14.5px;color:#4A5668}
section.alt .step,section.alt .card,section.alt .pl,section.alt .wk{border-color:#D9E0EA}

/* lists */
ul.ticks{list-style:none;margin:16px 0}
ul.ticks li{padding:7px 0 7px 28px;position:relative}
ul.ticks li:before{content:"";position:absolute;left:0;top:16px;width:10px;height:10px;background:var(--copper);border-radius:1px}
.checks{display:grid;grid-template-columns:1fr 1fr;gap:6px 32px}

/* faq */
details{border:1px solid var(--line);border-radius:6px;margin-bottom:12px;background:#fff}
summary{cursor:pointer;font-weight:600;color:var(--navy);padding:18px 22px;font-size:17px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";font-family:var(--fm);color:var(--copper);font-size:20px;line-height:1}
details[open] summary:after{content:"\2013"}
details p{padding:0 22px 20px;color:#4A5668}

/* notice / quote */
.quote{border-left:3px solid var(--copper);padding:6px 0 6px 24px;font-family:var(--fh);font-size:24px;font-weight:600;color:var(--navy);letter-spacing:-.01em;line-height:1.35;max-width:820px}
.note{background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:20px 24px;font-size:15px;color:#4A5668}

/* cta band */
.ctaband{background:var(--navy);color:#fff;padding:76px 0}
.ctaband .in{display:grid;grid-template-columns:1.4fr 1fr;gap:48px;align-items:center}
.ctaband h2{color:#fff;margin-bottom:12px}
.ctaband p{color:#C9D4E0;font-size:17.5px}
.ctaband .btns{margin-top:0;justify-content:flex-end}

/* page hero (inner pages) */
.phero{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.phero:before{content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:64px 64px}
.phero .in{position:relative;padding:70px 24px 74px;display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.phero h1{color:#fff;font-size:46px;font-weight:700;letter-spacing:-.025em;line-height:1.08;margin:16px 0 18px}
.phero p{color:#C9D4E0;font-size:18.5px;max-width:640px}
.phero .in>img{border-radius:6px;aspect-ratio:3/2;object-fit:cover;width:100%;height:auto;border:1px solid rgba(255,255,255,.14)}
.crumb{font-family:var(--fm);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--sky)}
.crumb a{color:var(--sky)}
.crumb a:hover{color:#fff}

/* offices */
.office{background:#fff;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.office>img{aspect-ratio:3/2;object-fit:cover;width:100%;height:auto}
.office .b{padding:24px}
.office .k{font-family:var(--fm);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--copper);margin-bottom:8px}
.office p{font-size:15.5px;color:#3C4858}

/* form */
form.contact{display:grid;grid-template-columns:1fr 1fr;gap:16px}
form.contact .full{grid-column:1/-1}
label{display:block;font-family:var(--fm);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
input,textarea,select{width:100%;font:inherit;font-size:16px;padding:12px 14px;border:1px solid #CBD5E3;border-radius:4px;background:#fff;color:var(--text)}
input:focus,textarea:focus,select:focus{outline:2px solid var(--steel);outline-offset:1px;border-color:var(--steel)}
textarea{min-height:140px;resize:vertical}
button.btn{cursor:pointer;font-family:inherit}

/* footer */
footer{background:var(--ink);color:#9FB0C4;padding:64px 0 28px;font-size:14.5px}
footer .grid{grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:40px}
footer h4{color:#fff;font-family:var(--fm);font-weight:500;font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;margin-bottom:16px}
footer a{color:#B9C7DA}
footer a:hover{color:var(--copper2)}
footer li{list-style:none;padding:4px 0}
footer .brand{color:#fff;margin-bottom:16px}
footer .brand .word span{color:#7F91A8}
.fine{border-top:1px solid var(--line2);margin-top:44px;padding-top:20px;font-size:12.5px;color:#6E8098;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}

/* responsive */
@media(max-width:1000px){
  .hero .in,.phero .in,.split,.ctaband .in{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:44px}.phero h1{font-size:36px}
  .g3,.g4,.work,.plogos,.steps,.steps.steps5,.cols3{grid-template-columns:1fr 1fr}
  .facts .in{grid-template-columns:1fr 1fr}.fact:nth-child(3){border-left:none;padding-left:0}
  .fact{padding:22px 20px}
  footer .grid{grid-template-columns:1fr 1fr}
  .model{grid-template-columns:1fr}.arrow{transform:rotate(90deg);padding:6px 0}
  .ctaband .btns{justify-content:flex-start}
}
@media(max-width:640px){
  .g2,.g3,.g4,.work,.plogos,.steps,.steps.steps5,.cols3,.checks,form.contact{grid-template-columns:1fr}
  .facts .in{grid-template-columns:1fr}.fact{border-left:none;padding:18px 0;border-top:1px solid rgba(255,255,255,.12)}.fact:first-child{border-top:none}
  h2{font-size:30px}.hero h1{font-size:36px}.phero h1{font-size:30px}.hero .in{padding:72px 24px 64px}
  section{padding:64px 0}
  .nav nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;flex-direction:column;align-items:flex-start;padding:18px 24px 22px;border-bottom:1px solid var(--line);gap:14px}
  .nav nav.open{display:flex}#mtoggle{display:block}
  .brand .word b{font-size:16px}
  footer .grid{grid-template-columns:1fr}
}

/* partner logo tile */
.plogo{display:inline-flex;align-items:center;height:60px;margin:6px 0 10px}
.plogo img{height:46px;width:auto;max-width:240px}
/* address cards */
.addr{background:#fff;border:1px solid var(--line);border-radius:6px;padding:26px 26px 24px}
.addr .k{font-family:var(--fm);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--copper);margin-bottom:10px}
.addr p{font-size:15.5px;color:#3C4858}
.addr+.addr{margin-top:18px}
.where{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:start}
.where>img{border-radius:6px;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}
@media(max-width:1000px){.where{grid-template-columns:1fr}}