/* ==========================================================================
   TECTONI AFRICA LTD — tectoni.com
   Design system: "Borehole"
   Palette derives from a core box: abyss water, laterite, sand, weathered
   rock, limestone. Brand blue + signal green from the Tectoni mark.
   ========================================================================== */

/* ---------- tokens ---------- */
:root{
  --abyss:#04191e;
  --strata:#0a2b33;
  --slate:#123b44;
  --steel:#1d515c;
  --limestone:#eceeea;
  --paper:#f7f8f5;
  --ink:#08161a;
  --ink-soft:#41565c;
  --line:#d5dad3;
  --line-dark:rgba(236,238,234,.16);

  --nile:#0071c1;          /* brand blue */
  --nile-lite:#4ba3e8;
  --signal:#1de04b;        /* brand green */
  --laterite:#c4552b;      /* murram */
  --sand:#b08a5b;
  --rock:#3d7481;

  --f-display:"Archivo",-apple-system,"Segoe UI",sans-serif;
  --f-body:"Newsreader",Georgia,"Times New Roman",serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,monospace;

  --rail:78px;
  --wrap:1280px;
  --pad:clamp(20px,5vw,64px);
  --r:4px;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-body);font-size:1.0625rem;line-height:1.68;
  font-optical-sizing:auto;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit}
button{font:inherit}
:focus-visible{outline:3px solid var(--signal);outline-offset:3px;border-radius:2px}
::selection{background:var(--signal);color:var(--abyss)}

/* ---------- type ---------- */
h1,h2,h3,h4,h5{
  font-family:var(--f-display);font-weight:700;
  font-stretch:112%;letter-spacing:-.022em;line-height:1.02;
  margin:0 0 .5em;text-wrap:balance;
}
h1{font-size:clamp(2.6rem,7.2vw,5.6rem);font-weight:800;font-stretch:118%}
h2{font-size:clamp(2rem,4.4vw,3.5rem)}
h3{font-size:clamp(1.3rem,2.1vw,1.72rem);letter-spacing:-.015em}
h4{font-size:1.06rem;font-stretch:106%;letter-spacing:.005em}
h1 em,h2 em,h3 em{font-style:italic;font-family:var(--f-body);font-weight:500;font-stretch:normal;letter-spacing:-.01em}
p{margin:0 0 1.1em;max-width:68ch}
.lead{font-size:clamp(1.16rem,1.9vw,1.42rem);line-height:1.56;color:var(--ink-soft)}
.dark .lead{color:rgba(236,238,234,.76)}
strong{font-weight:650}
.mono{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.16em;text-transform:uppercase;font-weight:500}

/* eyebrow reads like a borehole log entry */
.eyebrow{
  display:flex;align-items:center;gap:.62rem;
  font-family:var(--f-mono);font-size:.7rem;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;color:var(--ink-soft);
  margin:0 0 1.5rem;
}
.eyebrow::before{
  content:"";width:26px;height:2px;background:var(--signal);flex:none;
}
.dark .eyebrow{color:rgba(236,238,234,.66)}

/* ---------- layout ---------- */
.wrap{max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.section{padding:clamp(64px,9vw,128px) 0;position:relative}
.section--tight{padding:clamp(48px,6vw,84px) 0}
.dark{background:var(--abyss);color:var(--limestone)}
.dark h1,.dark h2,.dark h3,.dark h4{color:var(--limestone)}
.mid{background:var(--limestone)}
.rule{height:1px;background:var(--line);border:0;margin:0}
.dark .rule{background:var(--line-dark)}

.cols{display:grid;gap:clamp(28px,4vw,64px)}
@media(min-width:900px){
  .cols--2{grid-template-columns:repeat(2,1fr)}
  .cols--3{grid-template-columns:repeat(3,1fr)}
  .cols--4{grid-template-columns:repeat(4,1fr)}
  .cols--sidebar{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}
}
@media(min-width:640px) and (max-width:899px){
  .cols--3,.cols--4{grid-template-columns:repeat(2,1fr)}
}

/* ---------- depth rail (signature) ---------- */
.rail{
  position:fixed;left:0;top:0;bottom:0;width:var(--rail);z-index:60;
  background:var(--abyss);border-right:1px solid rgba(236,238,234,.1);
  display:none;flex-direction:column;align-items:center;
  padding:16px 0 20px;pointer-events:none;
}
@media(min-width:1100px){.rail{display:flex}
  body{padding-left:var(--rail)}
}
.rail__cap{
  font-family:var(--f-mono);font-size:.56rem;letter-spacing:.18em;
  color:rgba(236,238,234,.5);text-transform:uppercase;writing-mode:horizontal-tb;
}
.rail__core{
  position:relative;flex:1;width:15px;margin:14px 0;border-radius:2px;
  background:linear-gradient(180deg,
    var(--sand) 0%, var(--sand) 12%,
    var(--laterite) 12%, var(--laterite) 33%,
    #8d6f4c 33%, #8d6f4c 50%,
    var(--rock) 50%, var(--rock) 72%,
    #24515c 72%, #24515c 88%,
    #16323a 88%, #16323a 100%);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,.35);
  overflow:hidden;
}
.rail__core::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(180deg,rgba(0,0,0,.16) 0 1px,transparent 1px 14px);
}
.rail__bit{
  position:absolute;left:50%;translate:-50% 0;top:0;
  width:27px;height:27px;border-radius:50%;
  background:var(--signal);z-index:2;
  box-shadow:0 0 0 4px rgba(29,224,75,.18),0 0 22px rgba(29,224,75,.45);
  transition:top .12s linear;
}
.rail__bit::after{
  content:"";position:absolute;left:50%;top:50%;translate:-50% -50%;
  width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;
  border-top:8px solid var(--abyss);
}
.rail__depth{
  font-family:var(--f-mono);font-size:.86rem;font-weight:600;color:var(--signal);
  letter-spacing:.02em;
}
.rail__unit{font-family:var(--f-mono);font-size:.55rem;letter-spacing:.2em;color:rgba(236,238,234,.45);text-transform:uppercase}

/* mobile progress strand */
.strand{position:fixed;top:0;left:0;height:3px;background:var(--signal);width:0;z-index:120;transition:width .1s linear}
@media(min-width:1100px){.strand{display:none}}

/* ---------- header ---------- */
.hdr{
  position:sticky;top:0;z-index:90;background:rgba(4,25,30,.86);
  backdrop-filter:blur(14px) saturate(1.3);
  border-bottom:1px solid rgba(236,238,234,.12);color:var(--limestone);
}
.hdr__in{display:flex;align-items:center;gap:1.5rem;height:70px;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;flex:none}
.brand img{height:31px;width:auto}
.brand span{font-family:var(--f-mono);font-size:.6rem;letter-spacing:.22em;text-transform:uppercase;color:rgba(236,238,234,.6);display:none}
@media(min-width:1180px){.brand span{display:block;border-left:1px solid rgba(236,238,234,.22);padding-left:.7rem;line-height:1.35;max-width:120px}}
.nav{display:none;margin-left:auto;align-items:center;gap:.15rem}
@media(min-width:1160px){.nav{display:flex}}
.nav a{
  text-decoration:none;font-family:var(--f-display);font-size:.83rem;font-weight:600;
  font-stretch:104%;letter-spacing:.01em;padding:.55rem .68rem;border-radius:var(--r);
  color:rgba(236,238,234,.82);transition:color .2s,background .2s;white-space:nowrap;
}
.nav a:hover{color:#fff;background:rgba(236,238,234,.09)}
.nav a[aria-current="page"]{color:var(--signal)}
.nav__drop{position:relative}
.nav__drop>button{
  background:none;border:0;color:rgba(236,238,234,.82);cursor:pointer;
  font-family:var(--f-display);font-size:.83rem;font-weight:600;font-stretch:104%;
  padding:.55rem .68rem;border-radius:var(--r);display:flex;align-items:center;gap:.35rem;
}
.nav__drop>button:hover{color:#fff;background:rgba(236,238,234,.09)}
.nav__drop>button::after{content:"";width:5px;height:5px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;rotate:45deg;translate:0 -2px}
.nav__menu{
  position:absolute;top:calc(100% + 10px);left:-10px;min-width:320px;
  background:var(--abyss);border:1px solid rgba(236,238,234,.15);border-radius:6px;
  padding:.5rem;display:none;box-shadow:0 26px 60px rgba(0,0,0,.5);
}
.nav__drop[data-open="true"] .nav__menu{display:block}
.nav__menu a{display:block;padding:.6rem .7rem;font-size:.85rem;line-height:1.3}
.nav__menu a small{display:block;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.13em;text-transform:uppercase;color:rgba(236,238,234,.45);margin-top:.2rem;font-weight:400}
.hdr__cta{margin-left:auto;display:flex;align-items:center;gap:.5rem}
@media(min-width:1160px){.hdr__cta{margin-left:.6rem}}
.burger{
  margin-left:auto;background:none;border:1px solid rgba(236,238,234,.28);color:inherit;
  width:42px;height:38px;border-radius:var(--r);display:grid;place-items:center;cursor:pointer;
}
@media(min-width:1160px){.burger{display:none}}
.burger span{width:17px;height:1.5px;background:currentColor;position:relative;display:block}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:17px;height:1.5px;background:currentColor}
.burger span::before{top:-5.5px}.burger span::after{top:5.5px}

.drawer{
  position:fixed;inset:0;background:var(--abyss);z-index:100;
  padding:22px var(--pad) 40px;overflow-y:auto;display:none;
}
.drawer[data-open="true"]{display:block}
.drawer__top{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.6rem}
.drawer__close{background:none;border:1px solid rgba(236,238,234,.28);color:var(--limestone);width:42px;height:38px;border-radius:var(--r);cursor:pointer;font-size:1.1rem}
.drawer a{display:block;color:var(--limestone);text-decoration:none;font-family:var(--f-display);font-weight:650;font-stretch:110%;font-size:1.5rem;padding:.5rem 0;border-bottom:1px solid rgba(236,238,234,.1)}
.drawer .sub a{font-size:.98rem;font-weight:500;color:rgba(236,238,234,.72);padding:.42rem 0;border:0}
.drawer h5{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.2em;text-transform:uppercase;color:rgba(236,238,234,.45);margin:1.6rem 0 .4rem}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;cursor:pointer;
  font-family:var(--f-display);font-weight:650;font-stretch:106%;font-size:.9rem;
  padding:.82rem 1.4rem;border-radius:var(--r);border:1px solid transparent;
  background:var(--nile);color:#fff;transition:transform .18s var(--ease),background .18s,box-shadow .18s;
  line-height:1;
}
.btn:hover{background:#0060a6;transform:translateY(-2px);box-shadow:0 12px 26px rgba(0,113,193,.3)}
.btn--signal{background:var(--signal);color:var(--abyss)}
.btn--signal:hover{background:#16c440;box-shadow:0 12px 26px rgba(29,224,75,.28)}
.btn--ghost{background:transparent;border-color:currentColor;color:inherit}
.btn--ghost:hover{background:rgba(255,255,255,.09);box-shadow:none}
.dark .btn--ghost:hover{background:rgba(236,238,234,.1)}
.btn--sm{padding:.6rem 1rem;font-size:.8rem}
.btn::after{content:"→";font-family:var(--f-mono);font-size:.85em;translate:0 -1px}
.btn--plain::after{content:none}
.btns{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.6rem}

/* ---------- hero ---------- */
.hero{position:relative;min-height:clamp(560px,88svh,880px);display:flex;align-items:flex-end;background:var(--abyss);color:var(--limestone);overflow:hidden}
.hero__bg{position:absolute;inset:0}
.hero__bg img{width:100%;height:100%;object-fit:cover;opacity:.62;filter:saturate(1.05)}
.hero__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(4,25,30,.82) 0%,rgba(4,25,30,.35) 38%,rgba(4,25,30,.92) 92%),
             linear-gradient(90deg,rgba(4,25,30,.86) 0%,rgba(4,25,30,.15) 62%);
}
.hero__in{position:relative;width:100%;max-width:var(--wrap);margin-inline:auto;padding:clamp(96px,14vh,150px) var(--pad) clamp(30px,5vh,52px)}
.hero h1{max-width:16ch;margin-bottom:.35em}
.hero .lead{max-width:52ch;color:rgba(236,238,234,.82)}
.hero__kicker{display:inline-flex;align-items:center;gap:.6rem;font-family:var(--f-mono);font-size:.66rem;letter-spacing:.22em;text-transform:uppercase;color:var(--signal);margin-bottom:1.4rem}
.hero__kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--signal);animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(29,224,75,.5)}50%{opacity:.55;box-shadow:0 0 0 8px rgba(29,224,75,0)}}
.hero__quick{display:flex;flex-wrap:wrap;gap:.45rem;margin-top:1.8rem;align-items:center}
.hero__quick span{font-family:var(--f-mono);font-size:.62rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(236,238,234,.5);margin-right:.3rem}
.chip{
  display:inline-block;text-decoration:none;font-family:var(--f-mono);font-size:.68rem;
  letter-spacing:.06em;padding:.42rem .72rem;border:1px solid rgba(236,238,234,.28);
  border-radius:100px;color:rgba(236,238,234,.86);transition:.18s;
}
.chip:hover{background:var(--signal);border-color:var(--signal);color:var(--abyss)}

/* stat strip */
.stats{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--line-dark)}
@media(min-width:820px){.stats{grid-template-columns:repeat(4,1fr)}}
.stat{padding:1.5rem 0 .2rem;border-right:1px solid var(--line-dark)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--f-display);font-size:clamp(1.9rem,3.4vw,2.9rem);font-weight:750;font-stretch:118%;line-height:1;color:var(--limestone)}
.stat i{font-style:normal;font-family:var(--f-mono);font-size:.63rem;letter-spacing:.16em;text-transform:uppercase;color:rgba(236,238,234,.58);display:block;margin-top:.55rem;max-width:20ch}
.stats--light .stat b{color:var(--ink)}
.stats--light{border-color:var(--line)}
.stats--light .stat{border-color:var(--line)}
.stats--light .stat i{color:var(--ink-soft)}

/* ---------- page masthead ---------- */
.mast{background:var(--abyss);color:var(--limestone);padding:clamp(56px,9vw,104px) 0 clamp(40px,6vw,72px);position:relative;overflow:hidden}
.mast::after{
  content:"";position:absolute;right:-8%;top:-30%;width:min(520px,52vw);aspect-ratio:1;
  background:radial-gradient(circle,rgba(0,113,193,.28),transparent 65%);pointer-events:none;
}
.mast h1{max-width:19ch}
.mast .lead{max-width:60ch}
.crumbs{font-family:var(--f-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(236,238,234,.5);margin-bottom:1.6rem}
.crumbs a{color:rgba(236,238,234,.72);text-decoration:none}
.crumbs a:hover{color:var(--signal)}
.crumbs span{opacity:.4;padding:0 .45rem}

/* ---------- cards ---------- */
.card{
  background:#fff;border:1px solid var(--line);border-radius:6px;padding:1.7rem;
  display:flex;flex-direction:column;transition:transform .22s var(--ease),box-shadow .22s,border-color .22s;
}
.card:hover{transform:translateY(-4px);box-shadow:0 20px 44px rgba(8,22,26,.1);border-color:#b9c2bb}
.dark .card{background:var(--strata);border-color:rgba(236,238,234,.14)}
.dark .card:hover{border-color:rgba(29,224,75,.5)}
.card__no{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.18em;color:var(--nile);text-transform:uppercase;margin-bottom:.9rem;display:block}
.dark .card__no{color:var(--signal)}
.card p{font-size:.97rem;color:var(--ink-soft);margin-bottom:0}
.dark .card p{color:rgba(236,238,234,.72)}
.card a.more{margin-top:auto;padding-top:1.2rem;font-family:var(--f-display);font-weight:650;font-size:.85rem;color:var(--nile);text-decoration:none;display:inline-flex;gap:.4rem}
.card a.more:hover{gap:.7rem}
.dark .card a.more{color:var(--signal)}

/* service card with rule accent */
.svc{position:relative;padding-top:1.9rem}
.svc::before{content:"";position:absolute;top:0;left:0;width:52px;height:3px;background:var(--signal)}

/* project card */
.proj{overflow:hidden;border-radius:6px;background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:transform .22s var(--ease),box-shadow .22s}
.proj:hover{transform:translateY(-4px);box-shadow:0 22px 48px rgba(8,22,26,.13)}
.proj__img{aspect-ratio:16/10;overflow:hidden;background:var(--strata);position:relative}
.proj__img img{width:100%;height:100%;object-fit:cover;transition:scale .5s var(--ease)}
.proj:hover .proj__img img{scale:1.05}
.proj__tag{position:absolute;left:12px;top:12px;background:var(--abyss);color:var(--signal);font-family:var(--f-mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;padding:.32rem .6rem;border-radius:3px}
.proj__body{padding:1.35rem 1.4rem 1.5rem;display:flex;flex-direction:column;flex:1}
.proj__body h3{font-size:1.14rem;margin-bottom:.5rem}
.proj__meta{font-family:var(--f-mono);font-size:.62rem;letter-spacing:.11em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:.8rem}
.proj__body p{font-size:.93rem;color:var(--ink-soft);margin-bottom:1rem}
.proj__client{margin-top:auto;padding-top:.9rem;border-top:1px solid var(--line);font-family:var(--f-mono);font-size:.66rem;letter-spacing:.08em;color:var(--ink)}
.proj__client b{color:var(--nile);font-weight:600}

/* filters */
.filters{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2.4rem}
.filter{
  font-family:var(--f-mono);font-size:.68rem;letter-spacing:.1em;text-transform:uppercase;
  padding:.5rem .85rem;border:1px solid var(--line);background:#fff;border-radius:100px;cursor:pointer;color:var(--ink-soft);
}
.filter[aria-pressed="true"]{background:var(--abyss);color:var(--signal);border-color:var(--abyss)}

/* ---------- log list (numbered scope items) ---------- */
.log{list-style:none;margin:0;padding:0;counter-reset:log}
.log li{
  counter-increment:log;position:relative;padding:.85rem 0 .85rem 3.4rem;
  border-bottom:1px solid var(--line);font-size:.99rem;
}
.dark .log li{border-color:var(--line-dark)}
.log li::before{
  content:counter(log,decimal-leading-zero);position:absolute;left:0;top:1.05rem;
  font-family:var(--f-mono);font-size:.66rem;letter-spacing:.1em;color:var(--nile);
}
.dark .log li::before{color:var(--signal)}
.log li b{display:block;font-family:var(--f-display);font-weight:650;font-size:1rem;margin-bottom:.15rem}

/* plain tick list */
.ticks{list-style:none;margin:0 0 1.2rem;padding:0}
.ticks li{position:relative;padding:.36rem 0 .36rem 1.5rem;font-size:.98rem}
.ticks li::before{content:"";position:absolute;left:0;top:.95em;width:8px;height:2px;background:var(--signal)}

/* ---------- media band ---------- */
.figure{position:relative;border-radius:6px;overflow:hidden}
.figure img{width:100%;height:100%;object-fit:cover}
.figure figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:1.6rem 1.3rem .95rem;
  background:linear-gradient(transparent,rgba(4,25,30,.9));color:var(--limestone);
  font-family:var(--f-mono);font-size:.66rem;letter-spacing:.11em;text-transform:uppercase;
}
.mosaic{display:grid;gap:12px;grid-template-columns:repeat(2,1fr)}
@media(min-width:760px){.mosaic{grid-template-columns:repeat(4,1fr)}
  .mosaic .figure:nth-child(1){grid-column:span 2;grid-row:span 2}
  .mosaic .figure:nth-child(6){grid-column:span 2}
}
.mosaic .figure{aspect-ratio:4/3}
.mosaic .figure:nth-child(1){aspect-ratio:auto}

/* video */
.video{position:relative;aspect-ratio:16/9;border-radius:6px;overflow:hidden;background:#000;border:1px solid var(--line-dark)}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ---------- client wall ---------- */
.wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:1px;background:var(--line);border:1px solid var(--line)}
.dark .wall{background:rgba(236,238,234,.14);border-color:rgba(236,238,234,.14)}
.wall div{background:var(--paper);padding:1.25rem 1.1rem;display:flex;flex-direction:column;justify-content:center;min-height:96px}
.dark .wall div{background:var(--abyss)}
.wall b{font-family:var(--f-display);font-weight:650;font-stretch:106%;font-size:.98rem;line-height:1.2}
.wall i{font-style:normal;font-family:var(--f-mono);font-size:.6rem;letter-spacing:.13em;text-transform:uppercase;color:var(--ink-soft);margin-top:.4rem}
.dark .wall i{color:rgba(236,238,234,.55)}

/* marquee */
.marquee{overflow:hidden;border-block:1px solid var(--line-dark);padding:1rem 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee__t{display:flex;gap:3rem;width:max-content;animation:slide 42s linear infinite}
@keyframes slide{to{transform:translateX(-50%)}}
.marquee span{font-family:var(--f-display);font-weight:650;font-stretch:110%;font-size:1.05rem;color:rgba(236,238,234,.62);white-space:nowrap}
.marquee span::after{content:"·";margin-left:3rem;color:var(--signal)}

/* ---------- accordion ---------- */
.acc{border-top:1px solid var(--line)}
.dark .acc{border-color:var(--line-dark)}
.acc details{border-bottom:1px solid var(--line)}
.dark .acc details{border-color:var(--line-dark)}
.acc summary{
  cursor:pointer;list-style:none;padding:1.25rem 2.6rem 1.25rem 0;position:relative;
  font-family:var(--f-display);font-weight:650;font-stretch:106%;font-size:1.06rem;
}
.acc summary::-webkit-details-marker{display:none}
.acc summary::after{
  content:"";position:absolute;right:.55rem;top:1.6rem;width:11px;height:11px;
  border-right:2px solid var(--nile);border-bottom:2px solid var(--nile);rotate:45deg;transition:rotate .2s;
}
.dark .acc summary::after{border-color:var(--signal)}
.acc details[open] summary::after{rotate:-135deg}
.acc .acc__b{padding:0 0 1.5rem;max-width:76ch}
.acc .acc__b p:last-child{margin-bottom:0}

/* ---------- tables ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:.93rem}
.tbl th,.tbl td{text-align:left;padding:.72rem .8rem;border-bottom:1px solid var(--line)}
.tbl th{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-soft);font-weight:500}
.tbl td b{font-family:var(--f-display);font-weight:650}
.tbl tbody tr:hover{background:#fff}
.scroller{overflow-x:auto}

/* ---------- glossary ---------- */
.gloss{display:grid;gap:1.4rem}
@media(min-width:760px){.gloss{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1120px){.gloss{grid-template-columns:repeat(3,1fr)}}
.gloss div{border-left:2px solid var(--signal);padding-left:1rem}
.gloss dt{font-family:var(--f-display);font-weight:650;font-size:.99rem;margin-bottom:.25rem}
.gloss dd{margin:0;font-size:.93rem;color:var(--ink-soft)}

/* ---------- forms ---------- */
.form{display:grid;gap:1.1rem}
.field{display:flex;flex-direction:column;gap:.42rem}
.field label,.lbl{
  font-family:var(--f-mono);font-size:.65rem;letter-spacing:.15em;text-transform:uppercase;color:var(--ink-soft);
}
.dark .field label,.dark .lbl{color:rgba(236,238,234,.62)}
.field input,.field select,.field textarea{
  font-family:var(--f-body);font-size:1rem;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:var(--r);padding:.78rem .9rem;width:100%;
  transition:border-color .18s,box-shadow .18s;
}
.field textarea{min-height:130px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--nile);box-shadow:0 0 0 3px rgba(0,113,193,.16)
}
.dark .field input,.dark .field select,.dark .field textarea{background:rgba(236,238,234,.06);border-color:rgba(236,238,234,.2);color:var(--limestone)}
.dark .field input:focus,.dark .field select:focus,.dark .field textarea:focus{border-color:var(--signal);box-shadow:0 0 0 3px rgba(29,224,75,.18)}
.field--row{display:grid;gap:1.1rem}
@media(min-width:680px){.field--row{grid-template-columns:1fr 1fr}}
.check{display:flex;gap:.6rem;align-items:flex-start;font-size:.93rem;padding:.5rem .7rem;border:1px solid var(--line);border-radius:var(--r);background:#fff;cursor:pointer}
.check input{margin-top:.28rem;accent-color:var(--nile);flex:none}
.check:has(input:checked){border-color:var(--nile);background:rgba(0,113,193,.06)}
.checks{display:grid;gap:.55rem}
@media(min-width:680px){.checks{grid-template-columns:repeat(2,1fr)}}
.hint{font-size:.83rem;color:var(--ink-soft);margin:0}

/* steps */
.steps{display:flex;gap:.4rem;margin-bottom:2rem;flex-wrap:wrap}
.step{
  font-family:var(--f-mono);font-size:.63rem;letter-spacing:.13em;text-transform:uppercase;
  padding:.45rem .8rem;border-radius:100px;border:1px solid var(--line);color:var(--ink-soft);
}
.step[data-on="true"]{background:var(--abyss);color:var(--signal);border-color:var(--abyss)}
.pane{display:none}
.pane[data-on="true"]{display:block;animation:fade .3s var(--ease)}
@keyframes fade{from{opacity:0;translate:0 8px}to{opacity:1;translate:0 0}}

/* ---------- tools ---------- */
.tool{background:#fff;border:1px solid var(--line);border-radius:6px;padding:clamp(1.3rem,3vw,2rem)}
.tool h3{margin-bottom:.35rem}
.tool__note{font-size:.85rem;color:var(--ink-soft);margin-bottom:1.4rem}
.out{
  margin-top:1.4rem;background:var(--abyss);color:var(--limestone);border-radius:var(--r);
  padding:1.2rem 1.3rem;font-family:var(--f-mono);font-size:.86rem;line-height:1.8;
}
.out b{color:var(--signal);font-weight:600}
.out .big{display:block;font-family:var(--f-display);font-size:2rem;font-weight:750;font-stretch:116%;color:var(--signal);line-height:1.1;margin:.2rem 0 .5rem}
.out ul{margin:.6rem 0 0;padding-left:1.1rem}
.out li{margin-bottom:.2rem}
canvas{max-width:100%;height:auto;background:#fff;border:1px solid var(--line);border-radius:var(--r)}

/* ---------- CTA band ---------- */
.band{background:var(--abyss);color:var(--limestone);position:relative;overflow:hidden}
.band::before{
  content:"";position:absolute;inset:0;opacity:.22;
  background:url("../img/marine-sunset-rig-800.jpg") center/cover;
}
.band::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(4,25,30,.96),rgba(4,25,30,.62))}
.band .wrap{position:relative;z-index:2;padding-block:clamp(56px,8vw,104px)}
.band h2{max-width:17ch}

/* ---------- footer ---------- */
.ftr{background:var(--abyss);color:rgba(236,238,234,.72);padding:clamp(52px,7vw,86px) 0 2rem;border-top:1px solid rgba(236,238,234,.12)}
.ftr__grid{display:grid;gap:2.4rem}
@media(min-width:860px){.ftr__grid{grid-template-columns:1.4fr 1fr 1fr 1.2fr}}
.ftr h5{font-family:var(--f-mono);font-size:.63rem;letter-spacing:.2em;text-transform:uppercase;color:var(--limestone);margin:0 0 1rem}
.ftr a{color:rgba(236,238,234,.72);text-decoration:none;display:block;padding:.24rem 0;font-size:.93rem}
.ftr a:hover{color:var(--signal)}
.ftr img.mark{height:34px;margin-bottom:1rem}
.ftr p{font-size:.92rem;max-width:34ch}
.ftr__bot{
  margin-top:3rem;padding-top:1.5rem;border-top:1px solid rgba(236,238,234,.12);
  display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;
  font-family:var(--f-mono);font-size:.62rem;letter-spacing:.13em;text-transform:uppercase;color:rgba(236,238,234,.5);
}
.social{display:flex;gap:.55rem;margin-top:1.2rem}
.social a{
  width:38px;height:38px;border:1px solid rgba(236,238,234,.24);border-radius:var(--r);
  display:grid;place-items:center;padding:0;transition:.18s;
}
.social a:hover{background:var(--signal);border-color:var(--signal);color:var(--abyss)}
.social svg{width:16px;height:16px;fill:currentColor}

/* ---------- reveal ---------- */
.lift{opacity:0;translate:0 22px;transition:opacity .7s var(--ease),translate .7s var(--ease)}
.lift.in{opacity:1;translate:0 0}
@media (prefers-reduced-motion:reduce){.lift{opacity:1;translate:0 0}}

/* ---------- misc ---------- */
.pill{display:inline-block;font-family:var(--f-mono);font-size:.62rem;letter-spacing:.15em;text-transform:uppercase;padding:.3rem .6rem;border:1px solid var(--line);border-radius:100px;color:var(--ink-soft)}
.dark .pill{border-color:rgba(236,238,234,.25);color:rgba(236,238,234,.7)}
.note{border-left:3px solid var(--signal);padding:.2rem 0 .2rem 1.1rem;font-size:.93rem;color:var(--ink-soft)}
.skip{position:absolute;left:-9999px;top:0;background:var(--signal);color:var(--abyss);padding:.7rem 1.1rem;z-index:200;font-family:var(--f-mono);font-size:.75rem}
.skip:focus{left:8px;top:8px}
.center{text-align:center}
.mt0{margin-top:0}.mb0{margin-bottom:0}

/* ==========================================================================
   TOUCH ERGONOMICS — WCAG 2.5.8 target size on phones and tablets.
   Hit areas are expanded without altering the rendered layout.
   ========================================================================== */
@media (pointer:coarse){
  .crumbs a,.hint a,.note a,.acc__b a,.gloss a,.proj__body a,.card p a{position:relative}
  .crumbs a::after,.hint a::after,.note a::after,.acc__b a::after,
  .gloss a::after,.proj__body a::after,.card p a::after{
    content:"";position:absolute;left:-6px;right:-6px;top:50%;
    height:30px;transform:translateY(-50%);
  }
  .tbl td a{display:inline-block;padding-block:.42rem;min-height:30px}
  /* short inline links get a real box rather than a phantom hit area */
  .crumbs a,.hint a,.note a{display:inline-block;padding-block:.42rem;margin-block:-.42rem;min-height:30px}
  .crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:.15rem}
  .tiktok-embed a{display:inline-block;padding-block:.42rem;min-height:30px}
  .acc summary{padding-block:1.45rem}
  .filter{padding:.62rem .95rem}
}

/* ---------- very small handsets (≤360px) ---------- */
@media(max-width:360px){
  .tbl th,.tbl td{padding:.62rem .5rem;font-size:.88rem}
  .steps{gap:.3rem}
  .step{padding:.42rem .6rem;font-size:.6rem}
  .btns{gap:.55rem}
  .btn{width:100%;justify-content:center;text-align:center}
  .btn--sm{width:auto}
  .out{padding:1rem .95rem;font-size:.8rem}
  .out .big{font-size:1.6rem}
}

/* ---------- landscape phones: reclaim vertical space ---------- */
@media(max-height:520px) and (orientation:landscape){
  .hero{min-height:auto;padding-block:clamp(56px,12vh,96px)}
  .mast{padding-block:clamp(40px,10vh,72px) clamp(28px,6vh,48px)}
}

/* ---------- print ---------- */
@media print{
  .hdr,.drawer,.rail,.strand,.band,.ftr,.burger,.skip,.filters,.btns,.video{display:none!important}
  body{background:#fff;color:#000;font-size:11pt}
  .section,.mast{padding-block:1rem;background:#fff!important;color:#000!important}
  .mast h1,.section h2{color:#000!important}
  .out{background:#f2f2f2;color:#000;border:1px solid #999}
  .out .big,.out b{color:#000}
  a[href^="http"]::after{content:" (" attr(href) ")";font-size:8pt;word-break:break-all}
  .proj,.card,.tool{break-inside:avoid;border:1px solid #bbb}
}

/* TikTok embed: readable fallback if the third-party script is blocked */
.tiktok-embed{border:1px solid var(--line);border-radius:6px;padding:1.1rem 1.2rem;background:#fff;margin:0}
.tiktok-embed section{font-family:var(--f-mono);font-size:.8rem}

/* ==========================================================================
   MODERN LAYER
   Progressive enhancements. Every rule degrades silently on older engines.
   ========================================================================== */

/* ---------- typography: stop ragged headline breaks ---------- */
h1,h2,h3{text-wrap:balance}
.lead,.hint,.tool__note,.acc__b p,.proj__body p,.card p{text-wrap:pretty}
.mast h1,.hero h1{hyphens:manual}

/* ---------- anchor targets clear the sticky header ---------- */
:target,[id]{scroll-margin-top:90px}

/* ---------- skip work on offscreen sections ---------- */
@supports (content-visibility:auto){
  .section:not(:first-of-type){content-visibility:auto;contain-intrinsic-size:auto 640px}
  .mosaic .figure{content-visibility:auto;contain-intrinsic-size:auto 260px}
}

/* ---------- cross-document view transitions ---------- */
@view-transition{navigation:auto}
@media (prefers-reduced-motion:no-preference){
  ::view-transition-old(root){animation:vt-out .18s var(--ease) both}
  ::view-transition-new(root){animation:vt-in .26s var(--ease) both}
}
@keyframes vt-out{to{opacity:0}}
@keyframes vt-in{from{opacity:0;translate:0 10px}to{opacity:1;translate:0 0}}
.hdr,.rail,.strand{view-transition-name:none}

/* ---------- hero: settle on load rather than snap ---------- */
@media (prefers-reduced-motion:no-preference){
  .hero__in>*{animation:rise .7s var(--ease) both}
  .hero__in>*:nth-child(1){animation-delay:.02s}
  .hero__in>*:nth-child(2){animation-delay:.10s}
  .hero__in>*:nth-child(3){animation-delay:.18s}
  .hero__in>*:nth-child(4){animation-delay:.26s}
  .hero__in>*:nth-child(5){animation-delay:.34s}
}
@keyframes rise{from{opacity:0;translate:0 14px}to{opacity:1;translate:0 0}}

/* ---------- interaction polish ---------- */
.card,.proj,.tool,.figure{transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s}
@media (hover:hover){
  .card:hover,.tool:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(8,22,26,.10)}
  .figure:hover{transform:translateY(-3px)}
  .btn--signal:hover{box-shadow:0 8px 26px rgba(29,224,75,.28)}
  .more:hover span{translate:4px 0}
}
.more span{display:inline-block;transition:translate .2s var(--ease)}
.btn:active{transform:translateY(1px)}

/* ---------- selects: replace the OS arrow with our own ---------- */
.field select{
  appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--nile) 50%),
                   linear-gradient(135deg,var(--nile) 50%,transparent 50%);
  background-position:calc(100% - 20px) calc(1.28em),calc(100% - 14px) calc(1.28em);
  background-size:6px 6px,6px 6px;background-repeat:no-repeat;padding-right:2.6rem;
}

/* ---------- forms: honour invalid state after interaction ---------- */
.field input:user-invalid,.field textarea:user-invalid{border-color:var(--laterite)}

/* ---------- images: fade in rather than pop ---------- */
@media (prefers-reduced-motion:no-preference){
  .proj__img img,.figure img{transition:scale .5s var(--ease),opacity .4s ease}
}

/* ---------- scrollbar, tuned to the palette ---------- */
@supports (scrollbar-color:auto){
  html{scrollbar-color:var(--rock) var(--paper);scrollbar-width:thin}
}

/* ---------- reduced motion overrides everything above ---------- */
@media (prefers-reduced-motion:reduce){
  .hero__in>*{animation:none}
  @view-transition{navigation:none}
}