/* ============================================================================
   STRATA — Gulf-Teal inner-page design system
   Shared by services.html · projects.html · about.html · contact.html
   Tokens + nav + footer mirror mockups/home.html for a seamless site.
   ========================================================================== */

:root,:root[data-theme="dark"]{
  --bg:#0C0D10;          /* jet page */
  --bg-2:#16171B;        /* raised panel */
  --bg-3:#202126;        /* card hover / inset */
  --ink:#F1F2F3;         /* near-white text */
  --ink-2:#FFFFFF;
  --muted:#A6AAAF;       /* secondary text */
  --muted-d:#7A7E83;
  --steel:#E6CBA1;       /* sand-gold — structure / headings accent */
  --steel-hi:#F2DDC2;
  --steel-d:#CBA571;
  --amber:#45C2B4;       /* teal — interactive / accent */
  --amber-d:#319E92;
  --line:rgba(180,184,190,.13);
  --line-2:rgba(180,184,190,.25);
  --gold-fill:#E6CBA1;   /* gold button background */
  --on-gold:#0C0D10;     /* text on gold/steel buttons */
  --on-accent:#0C0D10;   /* text on teal/accent buttons */
  --sans:'Space Grotesk',Arial,sans-serif;
  --mono:'IBM Plex Mono',monospace;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--sans);background:var(--bg);color:var(--ink);
  -webkit-font-smoothing:antialiased;line-height:1.55;
  overflow-x:clip; /* clip (not hidden) so position:sticky descendants keep working */
}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;}
img,svg{display:block;max-width:100%;}
h1,h2,h3,h4{margin:0;font-weight:600;}
:focus-visible{outline:2px solid var(--steel);outline-offset:3px;}
::selection{background:rgba(69,194,180,.3);color:#fff;}

.wrap{max-width:1200px;margin:0 auto;padding:0 clamp(1.4rem,4vw,3rem);}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.28em;text-transform:uppercase;color:var(--steel);display:inline-flex;align-items:center;gap:.7rem;}
.eyebrow::before{content:'';width:24px;height:1px;background:var(--steel-d);}
.eyebrow b{color:var(--amber);font-weight:500;}

/* ===== NAV (matches home.html .top) ===== */
.top{position:fixed;top:0;left:0;right:0;z-index:60;display:flex;justify-content:space-between;align-items:center;
  padding:1.05rem clamp(1.4rem,4vw,3rem);background:rgba(12,13,16,.86);backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);transition:background .3s,border-color .3s,box-shadow .3s,transform .35s ease;}
.top.shadow{box-shadow:0 14px 40px -28px rgba(0,0,0,.9);}
.brand{font-weight:700;letter-spacing:.24em;font-size:1.12rem;color:#fff;line-height:1;}
.brand small{display:block;font-family:var(--mono);font-weight:400;letter-spacing:.16em;font-size:.52rem;color:var(--steel);margin-top:.28rem;text-transform:uppercase;}
.top__nav{display:flex;gap:1.6rem;align-items:center;}
.top__nav a{font-size:.84rem;color:rgba(231,241,242,.85);transition:color .25s;}
.top__nav a:hover{color:var(--steel);}
.top__nav a.is-active{color:var(--steel);}
.top__cta{font-family:var(--mono);font-size:.64rem;letter-spacing:.14em;text-transform:uppercase;color:var(--on-gold)!important;background:var(--gold-fill);padding:.62rem 1.05rem;transition:background .25s;}
.top__cta:hover{background:var(--steel-hi);}
@media(max-width:880px){.top__nav a:not(.top__cta){display:none;}}

/* ===== PAGE HEAD ===== */
.page-top{padding-top:66px;}
.phead{position:relative;background:linear-gradient(180deg,var(--bg-2),var(--bg));border-bottom:1px solid var(--line);padding:5rem 0 3.4rem;overflow:hidden;}
.phead::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(150,182,188,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(150,182,188,.05) 1px,transparent 1px);background-size:52px 52px;-webkit-mask-image:radial-gradient(120% 100% at 80% 0%,#000 30%,transparent 80%);mask-image:radial-gradient(120% 100% at 80% 0%,#000 30%,transparent 80%);pointer-events:none;}
.phead .wrap{position:relative;z-index:1;}
.crumb{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;text-transform:uppercase;color:var(--steel);}
.crumb a{color:var(--steel);}.crumb a:hover{color:var(--steel-hi);}
.phead h1{font-size:clamp(2.2rem,5vw,3.7rem);line-height:1.04;letter-spacing:-.02em;color:#fff;margin:.8rem 0 0;}
.phead h1 em{font-style:normal;color:var(--steel);}
.phead__lead{color:rgba(231,241,242,.82);max-width:46rem;margin:1.1rem 0 0;font-size:1.06rem;}

/* ===== SECTIONS ===== */
section.blk{padding:clamp(3.5rem,7vw,6rem) 0;border-top:1px solid var(--line);}
section.blk.alt{background:var(--bg-2);}
.head{max-width:48rem;}
.head .eyebrow{margin-bottom:1rem;}
.head h2{font-size:clamp(1.9rem,4vw,3rem);line-height:1.06;letter-spacing:-.02em;color:#fff;}
.head h2 em{font-style:normal;color:var(--steel);}
.head p{color:var(--muted);margin-top:1rem;font-size:1.05rem;}

/* ===== BUTTONS ===== */
.btn{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;padding:.95rem 1.6rem;min-height:48px;transition:background .25s,color .25s,border-color .25s,gap .25s;}
.btn--solid{background:var(--gold-fill);color:var(--on-gold);}
.btn--solid:hover{background:var(--steel-hi);gap:.9rem;}
.btn--ghost{border:1px solid var(--line-2);color:var(--ink);}
.btn--ghost:hover{border-color:var(--steel);color:var(--steel);}
.btn--teal{background:var(--amber);color:var(--on-accent);}
.btn--teal:hover{background:var(--amber-d);gap:.9rem;}
.btn-row{display:flex;gap:1rem;flex-wrap:wrap;}

/* ===== STATS STRIP ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.stats > div{background:var(--bg);padding:2.2rem 1.4rem;position:relative;}
.stats b{font-family:var(--mono);font-weight:500;font-size:clamp(1.8rem,3.3vw,2.6rem);color:var(--steel);display:block;line-height:1;}
.stats span{font-size:.84rem;color:var(--muted);margin-top:.7rem;display:block;}
.stats > div::after{content:'';position:absolute;left:1.4rem;top:1.6rem;width:18px;height:1px;background:var(--amber);}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr);}}

/* ===== STANDARDS CHIPS ===== */
.std__row{display:grid;grid-template-columns:160px 1fr;gap:1.4rem;padding:1.3rem 0;border-bottom:1px solid var(--line);}
.std__row:last-child{border-bottom:none;}
.std__k{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;text-transform:uppercase;color:var(--steel);}
.chips{display:flex;flex-wrap:wrap;gap:.55rem;}
.chip{font-family:var(--mono);font-size:.72rem;color:#DCEBE9;border:1px solid var(--line-2);padding:.45rem .8rem;}
.chip.soft{color:var(--steel);border-style:dashed;}
@media(max-width:640px){.std__row{grid-template-columns:1fr;gap:.6rem;}}

/* ===== CTA ===== */
.cta{text-align:center;background:linear-gradient(180deg,var(--bg-2),var(--bg));}
.cta h2{font-size:clamp(1.9rem,4vw,2.9rem);color:#fff;max-width:24ch;margin:0 auto 2rem;line-height:1.14;letter-spacing:-.02em;}
.cta h2 em{font-style:normal;color:var(--steel);}
.cta .btn-row{justify-content:center;}

/* ===== FOOTER (matches home.html .foot) ===== */
.foot{background:#070708;border-top:1px solid var(--line);padding:3.4rem 0 2.4rem;}
.foot__top{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem;padding-bottom:2rem;border-bottom:1px solid var(--line);}
.foot__b{font-weight:700;letter-spacing:.2em;font-size:1.25rem;color:#fff;}
.foot__tag{font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-top:.55rem;}
.foot__addr{font-size:.85rem;line-height:1.7;color:var(--muted);margin-top:1rem;}
.foot__col h4{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;color:var(--steel);margin-bottom:.9rem;}
.foot__col a{display:block;font-size:.86rem;padding:.26rem 0;color:rgba(231,241,242,.72);transition:color .2s;}
.foot__col a:hover{color:var(--steel);}
.foot__bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:1rem;padding-top:1.5rem;font-family:var(--mono);font-size:.64rem;letter-spacing:.1em;color:var(--muted-d);}
@media(max-width:760px){.foot__top{grid-template-columns:1fr;gap:1.4rem;}}

/* ===== SERVICES: quick index strip ===== */
.svc-index{background:var(--bg-2);border-bottom:1px solid var(--line);}
.svc-index__in{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem 1.3rem;padding:1rem 0;font-family:var(--mono);font-size:.7rem;letter-spacing:.05em;}
.svc-index__in .k{color:var(--steel);text-transform:uppercase;letter-spacing:.16em;}
.svc-index__in a{color:rgba(231,241,242,.7);border-bottom:1px solid transparent;padding:.15rem 0;transition:color .2s,border-color .2s;}
.svc-index__in a:hover{color:var(--steel);border-bottom-color:var(--steel-d);}

/* ===== SERVICES: flagship ===== */
.flagship{background:linear-gradient(160deg,var(--bg-3),var(--bg-2));}
.flagship__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:3.5rem;align-items:start;}
.flag-tag{font-family:var(--mono);font-size:.6rem;letter-spacing:.22em;text-transform:uppercase;color:var(--on-gold);background:var(--gold-fill);padding:.35rem .7rem;display:inline-block;}
.flagship h2{font-size:clamp(1.9rem,3.6vw,2.9rem);line-height:1.08;color:#fff;margin:1.1rem 0 0;letter-spacing:-.02em;}
.flagship__sub{font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);margin:.8rem 0 0;}
.flagship__lead{color:rgba(231,241,242,.85);font-size:1.06rem;margin:1.3rem 0 0;max-width:34rem;}
.flagship__cta{display:inline-flex;align-items:center;gap:.6rem;margin-top:1.8rem;font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:var(--on-gold);background:var(--gold-fill);padding:.85rem 1.35rem;min-height:46px;transition:background .25s,gap .25s;}
.flagship__cta:hover{background:var(--steel-hi);gap:.9rem;}
.covers{border:1px solid var(--line);background:rgba(12,13,16,.5);}
.covers h3{font-family:var(--mono);font-size:.66rem;letter-spacing:.2em;text-transform:uppercase;color:var(--steel);padding:1.1rem 1.4rem;border-bottom:1px solid var(--line);}
.covers ul{list-style:none;}
.covers li{display:grid;grid-template-columns:auto 1fr;gap:.85rem;align-items:start;padding:.85rem 1.4rem;border-bottom:1px solid var(--line);font-size:.92rem;color:rgba(231,241,242,.86);}
.covers li:last-child{border-bottom:none;}
.covers li .ck{color:var(--amber);font-size:1rem;line-height:1.3;}
@media(max-width:860px){.flagship__grid{grid-template-columns:1fr;gap:2.2rem;}}

/* ===== SERVICES: alternating rows ===== */
.srow{display:grid;grid-template-columns:.34fr .66fr;gap:2.5rem;padding:2.8rem 0;border-bottom:1px solid var(--line);align-items:start;}
.srow:last-child{border-bottom:none;}
.srow--rev{grid-template-columns:.66fr .34fr;}
.srow--rev .srow__head{order:2;}
.srow--rev .srow__body{order:1;}
.srow__num{font-family:var(--mono);font-size:.68rem;letter-spacing:.16em;color:var(--amber);}
.srow__t{font-size:clamp(1.4rem,2.4vw,1.9rem);color:#fff;margin:.5rem 0 0;line-height:1.12;letter-spacing:-.01em;}
.srow__what{font-size:1.02rem;color:rgba(231,241,242,.82);margin:0 0 1.1rem;line-height:1.6;}
.srow__meta{display:grid;grid-template-columns:auto 1fr;gap:.5rem 1rem;align-items:baseline;}
.srow__meta dt{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);padding-top:.15rem;}
.srow__meta dd{margin:0;}
.srow__codes{display:flex;flex-wrap:wrap;gap:.4rem;}
.scode{font-family:var(--mono);font-size:.68rem;color:#DCEBE9;border:1px solid var(--line-2);padding:.28rem .6rem;}
.srow__out{font-style:italic;color:var(--steel);font-size:.95rem;border-left:2px solid var(--amber);padding-left:.85rem;}
@media(max-width:760px){.srow,.srow--rev{grid-template-columns:1fr;gap:1.2rem;}.srow--rev .srow__head{order:1;}.srow--rev .srow__body{order:2;}}

/* ===== SERVICES: buildable feature ===== */
.build__grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:3.5rem;align-items:center;}
.build h2{font-size:clamp(1.9rem,3.4vw,2.7rem);line-height:1.1;color:#fff;margin:1rem 0 0;letter-spacing:-.02em;}
.build h2 em{font-style:normal;color:var(--steel);}
.build__body p{color:rgba(231,241,242,.82);font-size:1.04rem;margin:0 0 1rem;}
.build__metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.bmetric{background:var(--bg-2);padding:2rem 1.2rem;text-align:center;position:relative;}
.bmetric b{font-family:var(--mono);font-weight:500;font-size:clamp(1.8rem,3.4vw,2.5rem);color:var(--amber);display:block;line-height:1;}
.bmetric span{font-size:.78rem;color:var(--muted);display:block;margin-top:.7rem;line-height:1.4;}
.bmetric::after{content:'';position:absolute;left:50%;top:1.2rem;transform:translateX(-50%);width:24px;height:1px;background:var(--steel-d);}
.build__chain{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.6rem;font-family:var(--mono);font-size:.7rem;letter-spacing:.04em;color:rgba(231,241,242,.78);align-items:center;}
.build__chain b{color:var(--steel);font-weight:500;}
.build__chain i{color:var(--amber);font-style:normal;}
@media(max-width:860px){.build__grid{grid-template-columns:1fr;gap:2.2rem;}}

/* ===== TOOLS chips ===== */
.tools{display:flex;flex-wrap:wrap;gap:.6rem;margin-top:2.4rem;}
.tools span{font-family:var(--mono);font-size:.72rem;color:#DCEBE9;border:1px solid var(--line);padding:.45rem .85rem;}
.tools span.flag{color:var(--amber);border-color:rgba(54,179,166,.4);}

/* ===== PROJECTS: filter bar ===== */
.filterbar{position:sticky;top:66px;z-index:40;background:rgba(16,17,20,.92);backdrop-filter:saturate(140%) blur(8px);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:1.1rem 0;transition:transform .35s ease;}
/* hide-on-scroll-down chrome (nav + filter) — JS toggles html.hide-chrome on the Projects page */
html.hide-chrome .top{transform:translateY(-100%);}
@media(min-width:761px){ html.hide-chrome .filterbar{transform:translateY(calc(-100% - 66px));} }
.filterbar__in{display:flex;flex-wrap:wrap;align-items:center;gap:1.3rem;}
.filterbar__label{font-family:var(--mono);font-size:.64rem;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);white-space:nowrap;}
.filters{display:flex;flex-wrap:wrap;gap:.5rem;flex:1 1 auto;}
.filter{font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;color:var(--ink);background:transparent;border:1px solid var(--line-2);padding:.6rem 1rem;min-height:44px;display:inline-flex;align-items:center;gap:.5rem;line-height:1;transition:background .22s,color .22s,border-color .22s,box-shadow .22s;}
.filter:hover{border-color:var(--steel);color:var(--steel);}
.filter .filter__n{font-size:.62rem;color:var(--muted);transition:color .22s;}
.filter[aria-pressed="true"]{background:var(--amber);border-color:var(--amber);color:var(--on-accent);box-shadow:0 8px 22px -14px rgba(69,194,180,.5);}
.filter[aria-pressed="true"] .filter__n{color:var(--on-accent);}
.showing{font-family:var(--mono);font-size:.72rem;letter-spacing:.04em;color:var(--muted);white-space:nowrap;margin-left:auto;}
.showing b{color:var(--steel);font-weight:500;}
@media(max-width:760px){.filterbar{position:static;}.showing{margin-left:0;width:100%;}}

/* ===== PROJECTS: card grid ===== */
.pgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.6rem;}
@media(max-width:1000px){.pgrid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:620px){.pgrid{grid-template-columns:1fr;}}
.pcard{position:relative;background:var(--bg-2);border:1px solid var(--line);display:flex;flex-direction:column;color:inherit;overflow:hidden;transition:transform .4s cubic-bezier(.2,.7,.2,1),opacity .4s ease,border-color .25s,box-shadow .35s;}
.pcard:hover{border-color:var(--steel);box-shadow:0 26px 54px -34px rgba(0,0,0,.9);transform:translateY(-4px);}
.pcard.is-hidden{display:none;}
.pcard.is-anim{opacity:0;transform:translateY(16px) scale(.985);}
.pcard__ph{position:relative;height:172px;background:linear-gradient(155deg,var(--bg-3),#08090B);overflow:hidden;border-bottom:1px solid var(--line);}
.pcard__ph::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(150,182,188,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(150,182,188,.07) 1px,transparent 1px);background-size:100% 22px,30px 100%;}
.pcard__ph svg{position:absolute;inset:0;width:100%;height:100%;opacity:.9;}
.pcard__ph img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;opacity:.94;transition:transform .55s ease,opacity .3s;}
.pcard:hover .pcard__ph img{transform:scale(1.06);opacity:1;}
.pcard__ph::before{content:'';position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(8,9,11,.04) 38%,rgba(8,9,11,.62));}
.pcard__ph:has(img)::after{display:none;}
.pcard__ph .gl{fill:none;stroke:var(--steel);stroke-width:1.2;stroke-linecap:round;stroke-linejoin:round;opacity:.8;}
.pcard__ph .gl.thin{stroke:rgba(228,199,156,.42);stroke-width:.8;}
.pcard__ph .gf{fill:rgba(54,179,166,.08);stroke:rgba(228,199,156,.3);stroke-width:.7;}
.pcard__ph .ga{stroke:var(--amber);}
.pcard__phlabel{position:absolute;left:1rem;bottom:.85rem;font-family:var(--mono);font-size:.56rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);opacity:.95;z-index:2;text-shadow:0 1px 6px rgba(0,0,0,.9);}
.pcard__tag{position:absolute;top:.85rem;left:.85rem;font-family:var(--mono);font-size:.58rem;letter-spacing:.16em;text-transform:uppercase;color:var(--on-gold);background:var(--gold-fill);padding:.35rem .6rem;z-index:2;}
.pcard__b{padding:1.4rem 1.4rem 1.5rem;display:flex;flex-direction:column;gap:.7rem;flex:1 1 auto;}
.pcard__t{font-size:1.18rem;color:#fff;line-height:1.2;letter-spacing:-.01em;}
.pcard__ch{font-size:.9rem;color:var(--muted);line-height:1.5;}
.pcard__meta{margin-top:auto;display:flex;flex-direction:column;gap:.55rem;padding-top:.9rem;border-top:1px solid var(--line);}
.pcard__role{font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--amber);}
.pcard__codes{display:flex;flex-wrap:wrap;gap:.35rem;}
.pcard__code{font-family:var(--mono);font-size:.6rem;letter-spacing:.04em;color:var(--muted);border:1px solid var(--line);padding:.22rem .45rem;}
.pcard__go{display:inline-flex;align-items:center;gap:.45rem;font-family:var(--mono);font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--steel);margin-top:.2rem;transition:gap .25s,color .25s;}
.pcard:hover .pcard__go{gap:.8rem;color:var(--steel-hi);}
.empty{display:none;text-align:center;padding:4rem 1rem;color:var(--muted);}
.empty.is-shown{display:block;}
.empty b{font-size:1.3rem;color:#fff;display:block;margin-bottom:.5rem;}

/* ===== ABOUT: lead / people ===== */
.lead-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;}
.person{background:var(--bg-2);border:1px solid var(--line);display:grid;grid-template-columns:120px 1fr;}
.person__ph{background:linear-gradient(160deg,var(--bg-3),#08090B);position:relative;}
.person__ph::after{content:'';position:absolute;inset:0;background-image:linear-gradient(rgba(228,199,156,.16) 1px,transparent 1px);background-size:100% 20px;}
.person__b{padding:1.4rem 1.4rem 1.5rem;}
.person__n{font-size:1.25rem;color:#fff;}
.person__r{font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--amber);margin:.4rem 0 .85rem;}
.person__stat{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:-.35rem 0 .95rem;display:flex;align-items:baseline;gap:.5rem;}
.person__stat b{font-size:1.12rem;color:var(--steel);font-weight:600;letter-spacing:0;}
.person__d{font-size:.9rem;color:var(--muted);line-height:1.55;}
.person__cred{font-family:var(--mono);font-size:.62rem;color:var(--muted-d);margin-top:.85rem;}
.person__affil{font-family:var(--mono);font-size:.62rem;line-height:1.7;color:var(--muted);margin-top:.55rem;}
.person__affil b{color:var(--steel);letter-spacing:.08em;text-transform:uppercase;font-weight:600;}
@media(max-width:860px){.lead-grid{grid-template-columns:1fr;}}
@media(max-width:460px){.person{grid-template-columns:1fr;}.person__ph{height:130px;}}

/* ===== ABOUT: value split ===== */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:3.5rem;align-items:center;}
.split__lead{font-size:clamp(1.5rem,2.6vw,2.1rem);line-height:1.35;color:#fff;letter-spacing:-.01em;}
.split__lead em{font-style:normal;color:var(--steel);}
.split__body p{color:var(--muted);font-size:1.04rem;margin:0 0 1rem;}
@media(max-width:860px){.split{grid-template-columns:1fr;gap:2rem;}}

/* ===== ABOUT: principles ===== */
.princ{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:2.5rem;}
.princ > div{background:var(--bg-2);padding:1.8rem 1.5rem;}
.princ__n{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);}
.princ__t{font-size:1.15rem;color:#fff;margin:.6rem 0 .55rem;}
.princ__d{font-size:.9rem;color:var(--muted);line-height:1.55;}
@media(max-width:780px){.princ{grid-template-columns:1fr;}}

/* ===== COLLAB ===== */
.collab__list{display:flex;flex-wrap:wrap;border-top:1px solid var(--line);border-left:1px solid var(--line);}
.collab__item{flex:1 1 20%;min-width:160px;padding:1.25rem 1rem;text-align:center;border-right:1px solid var(--line);border-bottom:1px solid var(--line);font-size:1rem;color:var(--ink);display:flex;align-items:center;justify-content:center;background:var(--bg-2);}
.collab__note{margin-top:1.4rem;font-family:var(--mono);font-size:.66rem;color:var(--muted-d);}

/* ===== CONTACT ===== */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:3.5rem;align-items:start;}
@media(max-width:880px){.contact-grid{grid-template-columns:1fr;gap:2.4rem;}}
.field{margin-bottom:1.3rem;}
.field label{display:block;font-family:var(--mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--steel);margin-bottom:.5rem;}
.field input,.field select,.field textarea{width:100%;background:var(--bg-2);border:1px solid var(--line-2);color:var(--ink);font-family:var(--sans);font-size:.95rem;padding:.85rem .95rem;transition:border-color .2s,background .2s;}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--amber);background:var(--bg-3);}
.field textarea{min-height:140px;resize:vertical;}
.field--row{display:grid;grid-template-columns:1fr 1fr;gap:1.3rem;}
@media(max-width:520px){.field--row{grid-template-columns:1fr;}}
.form-note{font-family:var(--mono);font-size:.64rem;color:var(--muted-d);margin-top:.4rem;}
.field .req{color:var(--amber);}
.form-status{font-size:.96rem;line-height:1.6;padding:1.05rem 1.3rem;margin-top:1.1rem;background:var(--bg-2);color:var(--ink);border:1px solid var(--line-2);border-left:3px solid var(--amber);}
.form-status--err{border-left-color:#D24A3D;}
.hp{position:absolute;left:-9999px;}
.cinfo{display:flex;flex-direction:column;gap:1.6rem;}
.cinfo__block{border:1px solid var(--line);background:var(--bg-2);padding:1.5rem 1.6rem;}
.cinfo__k{font-family:var(--mono);font-size:.64rem;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);margin-bottom:.7rem;}
.cinfo__v{font-size:1.02rem;color:#fff;line-height:1.5;}
.cinfo__v a{color:var(--steel);}
.cinfo__v small{display:block;font-size:.82rem;color:var(--muted);margin-top:.3rem;}

/* ===== MOCKUP BANNER ===== */
.mk{position:fixed;bottom:0;left:0;right:0;z-index:50;background:var(--gold-fill);color:var(--on-gold);font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;text-align:center;padding:.45rem;}
.mk a{text-decoration:underline;}

@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  *,*::before,*::after{transition-duration:.001s!important;animation:none!important;}
}

/* ============================================================================
   THEME SYSTEM — three palettes selected by <html data-theme="…">, with a
   light/dark family flag <html data-mode="light|dark"> driving structural
   surface overrides.  Both attributes are set by the head script on every page.
     · data-theme="dark"       → Jet (#0C0D10)   · data-mode="dark"   (default :root)
     · data-theme="cool-mist"  → Cool Mist        · data-mode="light"
     · data-theme="cvd"        → Colour-safe      · data-mode="light"  (Okabe-Ito)
   Button text/background is fully token-driven (--gold-fill / --on-gold /
   --on-accent) so each palette gets a contrast-correct label colour.
   ========================================================================== */

/* ----- COOL MIST (soft cool light — the default light palette) ----- */
:root[data-theme="cool-mist"]{
  --bg:#E6ECEA; --bg-2:#F2F6F4; --bg-3:#DBE3E0;
  --ink:#1A2428; --ink-2:#0C1518; --muted:#4F6065; --muted-d:#67787D;
  --steel:#7E5A28; --steel-hi:#956E34; --steel-d:#634718;
  --amber:#0E7A74; --amber-d:#0A635E;
  --line:rgba(20,40,42,.13); --line-2:rgba(20,40,42,.22);
  --gold-fill:#C79B45; --on-gold:#27200E; --on-accent:#FFFFFF;
}
/* ----- COLOUR-SAFE (Okabe-Ito blue + orange, AA high-contrast) -----
   gold-fill darkened to #9A5B00 so white button text clears AA (≥4.5:1). */
:root[data-theme="cvd"]{
  --bg:#F3F4F6; --bg-2:#FFFFFF; --bg-3:#E8EAED;
  --ink:#15181C; --ink-2:#000000; --muted:#414750; --muted-d:#5A616B;
  --steel:#9A5B00; --steel-hi:#B26A00; --steel-d:#7A4800;
  --amber:#0063A6; --amber-d:#004E84;
  --line:rgba(20,24,30,.16); --line-2:rgba(20,24,30,.28);
  --gold-fill:#9A5B00; --on-gold:#FFFFFF; --on-accent:#FFFFFF;
}

/* ----- Light-mode structural overrides (apply to cool-mist AND cvd) ----- */
[data-mode="light"] .top{background:rgba(255,255,255,.85);}
[data-mode="light"] .phead{background:linear-gradient(180deg,#FFFFFF,var(--bg));}
[data-mode="light"] .filterbar{background:rgba(255,255,255,.92);}
[data-mode="light"] section.blk.alt,[data-mode="light"] .flagship{background:var(--bg-3);}
[data-mode="light"] .foot{background:var(--bg-3);border-top-color:var(--line);}
[data-mode="light"] .covers{background:var(--bg-2);}
[data-mode="light"] .pcard{box-shadow:0 12px 30px -22px rgba(20,30,34,.5);}
[data-mode="light"] .pcard:hover{box-shadow:0 26px 50px -30px rgba(20,30,34,.42);}
[data-mode="light"] .pcard__ph{background:linear-gradient(155deg,var(--bg-3),var(--bg-2));}
[data-mode="light"] .pcard__ph::before{background:linear-gradient(180deg,rgba(255,255,255,0) 42%,rgba(20,30,34,.34));}
[data-mode="light"] .pcard__phlabel{color:#FFFFFF;text-shadow:0 1px 6px rgba(0,0,0,.9);}
[data-mode="light"] .person__ph{background:linear-gradient(155deg,var(--bg-3),var(--bg-2));}
/* headings -> ink-2 */
[data-mode="light"] .brand,[data-mode="light"] .phead h1,[data-mode="light"] .head h2,
[data-mode="light"] .cta h2,[data-mode="light"] .flagship h2,[data-mode="light"] .srow__t,
[data-mode="light"] .build h2,[data-mode="light"] .princ__t,[data-mode="light"] .pcard__t,
[data-mode="light"] .person__n,[data-mode="light"] .split__lead,[data-mode="light"] .empty b,
[data-mode="light"] .foot__b{color:var(--ink-2);}
/* body / label greys -> ink/muted (token-driven, so cvd stays neutral) */
[data-mode="light"] .top__nav a{color:var(--ink);}
[data-mode="light"] .phead__lead,[data-mode="light"] .flagship__lead,
[data-mode="light"] .covers li,[data-mode="light"] .srow__what,
[data-mode="light"] .build__body p,[data-mode="light"] .build__chain,
[data-mode="light"] .svc-index__in a,[data-mode="light"] .chip,
[data-mode="light"] .scode,[data-mode="light"] .tools span{color:var(--ink);}
[data-mode="light"] .foot__col a{color:var(--muted);}
[data-mode="light"] .cinfo__v{color:var(--ink-2);}

/* ===== THEME SWITCHER (Dark · Cool Mist · Colour-safe) — fixed bottom-left ===== */
.theme-switch{position:fixed;left:1rem;bottom:1rem;z-index:80;display:inline-flex;gap:2px;
  background:var(--bg-2);border:1px solid var(--line-2);padding:3px;border-radius:3px;
  box-shadow:0 14px 34px -18px rgba(0,0,0,.7);}
.theme-switch__opt{display:inline-flex;align-items:center;gap:.4rem;min-height:40px;padding:.5rem .72rem;
  font-family:var(--mono);font-size:.6rem;letter-spacing:.1em;text-transform:uppercase;line-height:1;
  background:transparent;color:var(--muted);border:none;cursor:pointer;border-radius:2px;
  transition:background .2s,color .2s;}
.theme-switch__opt svg{width:15px;height:15px;flex-shrink:0;}
.theme-switch__opt:hover{color:var(--ink);}
[data-theme="dark"] .theme-switch__opt[data-t="dark"],
[data-theme="cool-mist"] .theme-switch__opt[data-t="cool-mist"],
[data-theme="cvd"] .theme-switch__opt[data-t="cvd"]{background:var(--amber);color:var(--on-accent);}
.theme-switch__opt:focus-visible{outline:2px solid var(--steel);outline-offset:2px;}
@media(max-width:560px){
  .theme-switch__opt{padding:.55rem .6rem;min-height:44px;}
  .theme-switch__opt span{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}
}

/* ===== MOBILE NAV — hamburger + slide-in drawer ===== */
.nav-btn{display:none;flex-direction:column;justify-content:space-between;width:26px;height:18px;
  background:none;border:none;padding:0;cursor:pointer;z-index:62;flex-shrink:0;}
.nav-btn span{display:block;width:100%;height:2px;background:var(--ink);border-radius:1px;
  transition:transform .28s,opacity .28s;}
@media(max-width:880px){.nav-btn{display:flex;}}

.nav-backdrop{display:none;position:fixed;inset:0;background:rgba(0,0,0,.55);z-index:69;
  backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);}
.nav-backdrop.is-open{display:block;}

.nav-drawer{position:fixed;top:0;right:0;bottom:0;width:min(82vw,300px);
  background:var(--bg-2);border-left:1px solid var(--line);z-index:70;
  transform:translateX(105%);transition:transform .32s cubic-bezier(.2,.7,.2,1);
  display:flex;flex-direction:column;overflow-y:auto;}
.nav-drawer.is-open{transform:translateX(0);}

.nav-drawer__head{display:flex;justify-content:space-between;align-items:center;
  padding:1.1rem 1.4rem;border-bottom:1px solid var(--line);flex-shrink:0;}
.nav-drawer__head .brand{font-weight:700;letter-spacing:.22em;font-size:1rem;color:var(--ink-2);}
.nav-drawer__head .brand small{display:block;font-family:var(--mono);font-weight:400;letter-spacing:.14em;
  font-size:.5rem;color:var(--steel);margin-top:.25rem;text-transform:uppercase;}
.nav-close{background:none;border:none;font-size:1.2rem;color:var(--muted);cursor:pointer;
  padding:.3rem .4rem;line-height:1;transition:color .2s;}
.nav-close:hover{color:var(--ink);}

.nav-drawer__links{display:flex;flex-direction:column;flex:1;padding:.6rem 0 1.8rem;}
.nav-drawer__links a{font-size:1.05rem;color:var(--ink);padding:.95rem 1.4rem;
  border-bottom:1px solid var(--line);display:block;transition:color .2s,background .2s;letter-spacing:.01em;}
.nav-drawer__links a:last-child{border-bottom:none;}
.nav-drawer__links a:hover{color:var(--steel);background:rgba(160,170,180,.08);}
.nav-drawer__links a.is-active{color:var(--steel);}
.nav-drawer__cta{margin:1.4rem 1.4rem 0!important;border:1px solid transparent!important;
  background:var(--gold-fill)!important;color:var(--on-gold)!important;text-align:center!important;
  font-family:var(--mono)!important;font-size:.72rem!important;letter-spacing:.14em!important;
  text-transform:uppercase!important;padding:1rem 1.4rem!important;border-bottom:none!important;}
.nav-drawer__cta:hover{background:var(--steel-hi)!important;color:var(--on-gold)!important;}

/* ===== SERVICES buildability metrics — mobile fix ===== */
@media(max-width:560px){
  .build__metrics{grid-template-columns:1fr;}
  .bmetric{text-align:left;}
  .bmetric::after{left:1.4rem;transform:none;}
}