/* ============================================================
   PHILIPSON & SONS
   Palette lifted directly from the house emblem:
   navy roundel, hull blue, and the container stack —
   gold, amber and oxide red used only where the logo uses them.
   ============================================================ */
:root{
  --navy-dk:#081C37;
  --navy:#102A48;
  --navy-mid:#295E8A;
  --hull:#2A4D6D;
  --gold:#FFDE59;
  --amber:#FF914C;
  --oxide:#70000E;
  --paper:#E9E7E0;
  --paper-2:#F5F4EF;
  --paper-3:#DCD9CF;
  --ink:#0B1A2B;
  --ink-60:rgba(11,26,43,.62);
  --rule:rgba(11,26,43,.16);
  --rule-dk:rgba(233,231,224,.18);
  --shell:1240px;
  --pad:clamp(20px,5vw,48px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:"IBM Plex Sans",system-ui,sans-serif;
  font-size:16.5px;line-height:1.6;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit}
.shell{max-width:var(--shell);margin:0 auto;padding-inline:var(--pad)}

.display{font-family:"Anton",Impact,sans-serif;font-weight:400;text-transform:uppercase;
  letter-spacing:.005em;line-height:.92}
.eyebrow{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--ink-60);margin:0 0 14px}
.eyebrow.on-dark{color:var(--gold)}

.btn{display:inline-flex;align-items:center;gap:.55em;border:1px solid var(--navy-dk);
  background:var(--navy-dk);color:var(--paper-2);padding:13px 22px;text-decoration:none;
  font-weight:600;font-size:.92rem;border-radius:2px;cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease}
.btn:hover{background:var(--navy-mid);border-color:var(--navy-mid);transform:translateY(-1px)}
.btn--ghost{background:transparent;color:var(--ink)}
.btn--ghost:hover{background:var(--navy-dk);color:var(--paper-2)}
.btn--gold{background:var(--gold);border-color:var(--gold);color:var(--navy-dk)}
.btn--gold:hover{background:#FFE87F;border-color:#FFE87F;color:var(--navy-dk)}
.btn--onDark{background:transparent;border-color:rgba(233,231,224,.45);color:var(--paper)}
.btn--onDark:hover{background:var(--paper);color:var(--navy-dk);border-color:var(--paper)}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px}

/* ---------- utility strip ---------- */
.strip{background:var(--navy-dk);color:rgba(233,231,224,.85);font-size:.76rem}
.strip .shell{display:flex;gap:26px;align-items:center;height:38px;justify-content:flex-end}
.strip a{text-decoration:none;opacity:.85}
.strip a:hover{opacity:1;color:var(--gold)}
.strip .ports{margin-right:auto;display:flex;gap:10px;align-items:center;
  font-family:"IBM Plex Mono",monospace}
.dot{width:6px;height:6px;border-radius:50%;background:var(--gold);display:inline-block}
@media(max-width:860px){.strip .hide-sm{display:none}}

/* ---------- masthead ---------- */
.masthead{position:sticky;top:0;z-index:60;background:var(--paper);
  border-bottom:1px solid var(--rule)}
.masthead .shell{display:flex;align-items:center;gap:32px;height:78px}
.mark{display:flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}
.mark img{width:44px;height:auto}
.mark b{font-family:"Anton",sans-serif;font-weight:400;font-size:1.24rem;letter-spacing:.012em;
  text-transform:uppercase;line-height:1;color:var(--navy-dk)}
.mark span{display:block;font-family:"IBM Plex Mono",monospace;font-size:.56rem;
  letter-spacing:.2em;color:var(--ink-60);margin-top:4px}
.nav{display:flex;gap:4px;margin-left:auto}
.nav>div{position:relative}
.nav>div>button{background:none;border:0;font:inherit;font-size:.9rem;font-weight:500;
  padding:10px 14px;cursor:pointer;color:var(--ink);border-radius:2px}
.nav>div>button:hover,.nav>div.open>button{background:var(--paper-3)}
.nav>div>button::after{content:"";display:inline-block;width:5px;height:5px;margin-left:7px;
  border-right:1.5px solid var(--ink-60);border-bottom:1.5px solid var(--ink-60);
  transform:rotate(45deg) translateY(-2px)}
.drop{position:absolute;top:calc(100% + 8px);left:0;min-width:274px;background:var(--paper-2);
  border:1px solid var(--rule);border-radius:3px;padding:10px;
  box-shadow:0 18px 44px rgba(8,28,55,.18);display:none}
.nav>div.open .drop{display:block}
/* invisible bridge: without this, the mouse crosses dead space between the
   button and the dropdown (the +8px gap above) and mouseleave fires before
   mouseenter reaches the menu, closing it before a link can be clicked */
@media(min-width:1021px){
  .nav>div::after{content:"";position:absolute;left:0;right:0;top:100%;height:8px}
}
.drop a{display:block;text-decoration:none;font-size:.88rem;padding:9px 12px;border-radius:2px}
.drop a:hover{background:var(--paper-3)}
.drop a small{display:block;color:var(--ink-60);font-size:.75rem}
.drop hr{border:0;border-top:1px solid var(--rule);margin:8px 12px}
.drop .grp{font-family:"IBM Plex Mono",monospace;font-size:.63rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-60);padding:8px 12px 4px}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--rule);
  border-radius:2px;padding:9px 12px;cursor:pointer;font:inherit;font-size:.85rem}
@media(max-width:1020px){
  .nav{display:none;position:absolute;top:78px;left:0;right:0;background:var(--paper-2);
    flex-direction:column;gap:0;padding:8px var(--pad) 20px;border-bottom:1px solid var(--rule)}
  .nav.show{display:flex}
  .nav>div>button{width:100%;text-align:left;border-bottom:1px solid var(--rule)}
  .drop{position:static;display:none;border:0;box-shadow:none;background:transparent;padding:4px 0 10px}
  .burger{display:block}
  .masthead .btn{display:none}
}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy-dk);color:var(--paper);overflow:hidden}
.hero .shell{position:relative;z-index:2;
  padding-top:clamp(52px,7vw,88px);padding-bottom:clamp(44px,6vw,68px)}
.skyline{position:absolute;inset:auto 0 0 0;width:100%;height:min(58%,330px);z-index:1;opacity:.55}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);
  gap:clamp(30px,5vw,68px);align-items:center}
.hero h1{margin:0 0 22px;font-size:clamp(2.6rem,6.6vw,4.9rem);max-width:15ch}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero p.lede{margin:0 0 30px;font-size:clamp(1rem,1.7vw,1.16rem);
  color:rgba(233,231,224,.82);max-width:47ch}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-emblem{text-align:center}
.hero-emblem img{width:min(232px,60%);margin:0 auto 26px;
  filter:drop-shadow(0 14px 34px rgba(0,0,0,.45))}
.credentials{border-left:2px solid var(--gold);padding-left:18px;text-align:left;
  font-size:.8rem;color:rgba(233,231,224,.72);line-height:1.8}
.credentials b{color:var(--paper);font-weight:600}
@media(max-width:920px){
  .hero-grid{grid-template-columns:1fr}
  .hero-emblem{text-align:left}
  .hero-emblem img{margin-inline:0;width:150px}
}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
}

/* ---------- section frame ---------- */
.sec{padding:clamp(56px,7vw,96px) 0;border-bottom:1px solid var(--rule)}
.sec-head{max-width:62ch;margin-bottom:clamp(30px,4vw,46px)}
.sec-head h2{margin:0 0 14px;font-size:clamp(1.9rem,4.2vw,3.1rem)}
.sec-head p{margin:0;color:var(--ink-60);font-size:1.02rem}

/* ---------- updates ---------- */
.updates{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule)}
.update{background:var(--paper);padding:26px 24px 24px;text-decoration:none;display:block;
  transition:background .2s ease}
.update:hover{background:var(--paper-2)}
.update .date{font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--navy-mid);margin-bottom:12px}
.update h3{margin:0 0 8px;font-size:1.06rem;font-weight:600;line-height:1.35}
.update p{margin:0 0 14px;font-size:.9rem;color:var(--ink-60)}
.update .go{font-size:.83rem;font-weight:600;color:var(--navy-dk);
  border-bottom:1.5px solid var(--amber);padding-bottom:2px}
@media(max-width:880px){.updates{grid-template-columns:1fr}}

/* ---------- services ---------- */
.tabs{display:flex;gap:2px;flex-wrap:wrap;border-bottom:1px solid var(--rule);margin-bottom:34px}
.tabs button{background:none;border:0;border-bottom:3px solid transparent;font:inherit;
  font-size:.9rem;font-weight:500;padding:12px 18px;cursor:pointer;color:var(--ink-60);
  margin-bottom:-1px}
.tabs button:hover{color:var(--ink)}
.tabs button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--amber);font-weight:600}
.panel{display:none}
.panel.on{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(26px,5vw,60px)}
.panel h3{margin:0 0 14px;font-size:clamp(1.5rem,3vw,2.1rem)}
.panel .intro{color:var(--ink-60);margin:0 0 20px}
.panel ul{margin:0;padding:0;list-style:none;border-top:1px solid var(--rule)}
.panel li{padding:14px 0;border-bottom:1px solid var(--rule);display:grid;
  grid-template-columns:34px 1fr;gap:14px;align-items:baseline;font-size:.94rem}
.panel li .n{font-family:"IBM Plex Mono",monospace;font-size:.72rem;color:var(--navy-mid)}
.panel li b{font-weight:600;display:block}
.panel li small{color:var(--ink-60);font-size:.85rem}
@media(max-width:880px){.panel.on{grid-template-columns:1fr}}

/* ---------- sectors ---------- */
.sectors{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule)}
.sector{background:var(--paper);padding:26px 24px;min-height:174px;display:flex;
  flex-direction:column;transition:background .2s ease,color .2s ease}
.sector:hover{background:var(--navy-dk);color:var(--paper)}
.sector:hover .k{color:var(--gold)}
.sector:hover p{color:rgba(233,231,224,.75)}
.sector .k{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--navy-mid);margin-bottom:auto}
.sector h3{margin:20px 0 8px;font-size:1.14rem;font-weight:600}
.sector p{margin:0;font-size:.87rem;color:var(--ink-60);line-height:1.55}
@media(max-width:920px){.sectors{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.sectors{grid-template-columns:1fr}}

/* ---------- house ---------- */
.house{background:var(--navy-dk);color:var(--paper);border-bottom:0}
.house-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(30px,6vw,72px);align-items:center}
.house h2{margin:0 0 14px;font-size:clamp(1.9rem,4.2vw,3.1rem)}
.house .body{color:rgba(233,231,224,.78);margin:0}
.figs{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:38px}
.fig b{display:block;font-family:"Anton",sans-serif;font-weight:400;
  font-size:clamp(2.3rem,5vw,3.4rem);line-height:1;color:var(--gold)}
.fig span{display:block;font-family:"IBM Plex Mono",monospace;font-size:.7rem;letter-spacing:.13em;
  text-transform:uppercase;color:rgba(233,231,224,.6);margin-top:10px}
.ports-card{border:1px solid rgba(233,231,224,.22);border-radius:3px;overflow:hidden}
.ports-card svg{width:100%;height:auto;display:block;background:rgba(41,94,138,.16)}
.ports-list{border-top:1px solid rgba(233,231,224,.22)}
.port-item{display:flex;gap:14px;align-items:flex-start;padding:16px 20px;
  border-bottom:1px solid rgba(233,231,224,.12)}
.port-item:last-child{border-bottom:0}
.port-item .pin{width:9px;height:9px;border-radius:50%;background:var(--gold);
  margin-top:7px;flex:0 0 auto}
.port-item .pin--sq{border-radius:1px}
.port-item .pin--open{background:transparent;border:1.5px solid var(--gold);opacity:.7}
.port-item b{display:block;font-size:.98rem}
.port-item small{color:rgba(233,231,224,.65);font-size:.83rem}
@media(max-width:920px){.house-grid{grid-template-columns:1fr}}

/* ---------- trade desk ---------- */
.desk{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule)}
.tool{background:var(--paper-2);padding:24px 22px;text-decoration:none;display:block;
  transition:background .2s ease}
.tool:hover{background:var(--paper-3)}
.tool .code{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.14em;
  color:var(--navy-mid);text-transform:uppercase}
.tool h3{margin:14px 0 7px;font-size:1rem;font-weight:600}
.tool p{margin:0;font-size:.85rem;color:var(--ink-60)}
@media(max-width:920px){.desk{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.desk{grid-template-columns:1fr}}

/* ---------- enquiry ---------- */
.enq{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:clamp(28px,5vw,64px)}
.enq h2{margin:0 0 14px;font-size:clamp(1.9rem,4.2vw,3rem)}
.enq .intro{color:var(--ink-60);margin:0 0 26px}
.contact-line{display:flex;gap:12px;align-items:baseline;padding:13px 0;border-top:1px solid var(--rule)}
.contact-line .lbl{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-60);width:76px;flex:0 0 auto}
.contact-line a,.contact-line p{margin:0;font-size:.95rem;text-decoration:none;font-weight:500}
.contact-line a:hover{color:var(--navy-mid)}
.form{background:var(--paper-2);border:1px solid var(--rule);border-radius:3px;
  padding:clamp(22px,3vw,32px)}
.field{margin-bottom:16px}
.field label{display:block;font-family:"IBM Plex Mono",monospace;font-size:.68rem;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-60);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;font:inherit;font-size:.93rem;
  padding:11px 13px;border:1px solid var(--rule);border-radius:2px;background:var(--paper);
  color:var(--ink)}
.field textarea{min-height:96px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--navy-mid);
  outline:none;box-shadow:0 0 0 3px rgba(41,94,138,.18)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.note{font-size:.78rem;color:var(--ink-60);margin:14px 0 0}
.msg{display:none;font-size:.9rem;font-weight:600;margin:14px 0 0}
.msg.ok{color:var(--navy-mid)}
.msg.bad{color:var(--oxide)}
.msg.show{display:block}
@media(max-width:880px){.enq{grid-template-columns:1fr}.two{grid-template-columns:1fr}}

/* ---------- footer ---------- */
footer{background:var(--navy-dk);color:rgba(233,231,224,.7);font-size:.87rem}
.foot-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:32px;
  padding:clamp(44px,6vw,68px) 0 38px}
.foot-grid h4{font-family:"IBM Plex Mono",monospace;font-size:.68rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--gold);margin:0 0 16px;font-weight:500}
.foot-grid ul{list-style:none;margin:0;padding:0}
.foot-grid li{margin-bottom:9px}
.foot-grid a{text-decoration:none}
.foot-grid a:hover{color:var(--paper)}
.foot-mark img{width:66px;margin-bottom:16px}
.foot-mark b{font-family:"Anton",sans-serif;font-weight:400;font-size:1.3rem;color:var(--paper);
  text-transform:uppercase;display:block}
.foot-mark p{margin:12px 0 0;max-width:34ch;line-height:1.65}
.legal{border-top:1px solid rgba(233,231,224,.14);padding:20px 0;display:flex;gap:22px;
  flex-wrap:wrap;font-size:.79rem;color:rgba(233,231,224,.5)}
.legal a{text-decoration:none}
.legal a:hover{color:var(--paper)}
.legal .rt{margin-left:auto}
@media(max-width:1020px){.foot-grid{grid-template-columns:1fr 1fr;gap:28px}}
@media(max-width:560px){.foot-grid{grid-template-columns:1fr}.legal .rt{margin-left:0}}
.sr{position:absolute;left:-9999px}


/* ============================================================
   Trade desk guide pages
   ============================================================ */
.crumb{font-family:"IBM Plex Mono",monospace;font-size:.72rem;letter-spacing:.1em;
  text-transform:uppercase;color:rgba(233,231,224,.6);padding:22px 0 0}
.crumb a{text-decoration:none}
.crumb a:hover{color:var(--gold)}
.crumb span{margin:0 8px;opacity:.5}

.guide-hero{background:var(--navy-dk);color:var(--paper)}
.guide-hero .inner{padding:26px 0 clamp(40px,6vw,64px);max-width:72ch}
.guide-hero h1{margin:14px 0 18px;font-size:clamp(2.1rem,5.2vw,3.6rem)}
.guide-hero p{margin:0;font-size:clamp(1rem,1.7vw,1.14rem);color:rgba(233,231,224,.82)}
.guide-hero .updated{margin-top:22px;font-family:"IBM Plex Mono",monospace;font-size:.72rem;
  letter-spacing:.12em;text-transform:uppercase;color:var(--gold)}

.guide-body{padding:clamp(44px,6vw,72px) 0;display:grid;
  grid-template-columns:minmax(0,1fr) 260px;gap:clamp(32px,5vw,64px);align-items:start}
.prose{max-width:70ch;min-width:0}
.prose h2{font-family:"Anton",sans-serif;font-weight:400;text-transform:uppercase;
  letter-spacing:.005em;line-height:1;font-size:clamp(1.5rem,3.2vw,2.1rem);
  margin:44px 0 16px;scroll-margin-top:96px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.06rem;font-weight:600;margin:28px 0 8px}
.prose p{margin:0 0 16px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:22px}
.prose li{margin-bottom:9px}
.prose strong{font-weight:600}
.prose a{color:var(--navy-mid);text-decoration:underline;text-underline-offset:2px}
.prose a:hover{color:var(--ink)}
.prose code{font-family:"IBM Plex Mono",monospace;font-size:.88em;background:var(--paper-3);
  padding:2px 6px;border-radius:2px}

.tablewrap{overflow-x:auto;margin:0 0 22px;border:1px solid var(--rule);border-radius:3px}
table{border-collapse:collapse;width:100%;font-size:.88rem;background:var(--paper-2);min-width:520px}
caption{caption-side:bottom;text-align:left;font-size:.76rem;color:var(--ink-60);padding:10px 14px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--rule);vertical-align:top}
thead th{background:var(--navy-dk);color:var(--paper);font-family:"IBM Plex Mono",monospace;
  font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;font-weight:500;border-bottom:0}
tbody tr:last-child td{border-bottom:0}
td.mono,th.mono{font-family:"IBM Plex Mono",monospace;font-size:.84rem}

.callout{border-left:3px solid var(--gold);background:var(--paper-2);padding:18px 20px;
  margin:0 0 24px;font-size:.93rem}
.callout p:last-child{margin-bottom:0}
.callout b{display:block;font-family:"IBM Plex Mono",monospace;font-size:.68rem;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-60);margin-bottom:8px}

.toc{position:sticky;top:98px;font-size:.86rem;border-left:1px solid var(--rule);padding-left:20px}
.toc h4{font-family:"IBM Plex Mono",monospace;font-size:.66rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--ink-60);margin:0 0 14px;font-weight:500}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin-bottom:10px}
.toc a{text-decoration:none;color:var(--ink-60)}
.toc a:hover{color:var(--ink)}
.toc .ask{margin-top:24px;padding-top:20px;border-top:1px solid var(--rule)}
.toc .ask p{margin:0 0 12px;color:var(--ink-60);font-size:.84rem}
@media(max-width:900px){
  .guide-body{grid-template-columns:1fr}
  .toc{position:static;border-left:0;border-top:1px solid var(--rule);padding:24px 0 0}
}

.faq{border-top:1px solid var(--rule);margin-top:12px}
.faq details{border-bottom:1px solid var(--rule)}
.faq summary{cursor:pointer;padding:16px 0;font-weight:600;font-size:.98rem;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;font-family:"IBM Plex Mono",monospace;
  color:var(--navy-mid);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq .a{padding:0 0 18px;color:var(--ink-60);font-size:.93rem;max-width:66ch}
.faq .a p{margin:0 0 12px}
.faq .a p:last-child{margin-bottom:0}

.endcta{background:var(--navy-dk);color:var(--paper);padding:clamp(40px,5vw,60px) 0}
.endcta .inner{max-width:60ch}
.endcta h2{font-family:"Anton",sans-serif;font-weight:400;text-transform:uppercase;line-height:1;
  font-size:clamp(1.6rem,3.4vw,2.4rem);margin:0 0 14px}
.endcta p{margin:0 0 24px;color:rgba(233,231,224,.8)}

.related{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--rule);
  border:1px solid var(--rule);margin-top:8px}
.related a{background:var(--paper-2);padding:20px;text-decoration:none;display:block}
.related a:hover{background:var(--paper-3)}
.related .code{font-family:"IBM Plex Mono",monospace;font-size:.66rem;letter-spacing:.13em;
  text-transform:uppercase;color:var(--navy-mid)}
.related b{display:block;margin-top:10px;font-size:.96rem}
@media(max-width:760px){.related{grid-template-columns:1fr}}