/* DONSÖ — Floating Residential Infrastructure
   Nordic industrial profile: deep navy, cold grey, off-white, restrained sea-blue. */

:root{
  --navy:#0A1C2B;
  --navy-700:#123147;
  --ink:#14293A;
  --slate:#55697A;
  --slate-400:#8598A6;
  --line:#DCE3E8;
  --line-dark:#22405A;
  --paper:#FFFFFF;
  --offwhite:#F1F5F7;
  --sea:#1B6B8C;
  --sea-700:#155971;
  --sea-100:#E2EEF3;
  --amber:#8A5A1C;

  --w:1180px;
  --gut:24px;
  --r:3px;

  --f-head:"Manrope",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"DM Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-mono:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
}

*,*::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;transition-duration:.01ms!important}
}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-body);font-size:17px;line-height:1.62;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--sea-700);text-underline-offset:3px}
a:hover{color:var(--sea)}
h1,h2,h3,h4{font-family:var(--f-head);color:var(--navy);line-height:1.15;letter-spacing:-.018em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5.2vw,3.7rem);font-weight:700}
h2{font-size:clamp(1.55rem,3.3vw,2.4rem);font-weight:700}
h3{font-size:1.14rem;font-weight:700;letter-spacing:-.008em}
p{margin:0 0 1.05em}
ul{margin:0 0 1.05em;padding-left:1.15em}
li{margin-bottom:.38em}

:focus-visible{outline:3px solid var(--sea);outline-offset:3px;border-radius:2px}

.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--gut)}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:12px 18px;z-index:200}
.skip:focus{left:8px;top:8px}

/* ---------- eyebrow / section numbering ---------- */
.eyebrow{
  font-family:var(--f-head);font-size:.71rem;font-weight:700;
  letter-spacing:.17em;text-transform:uppercase;color:var(--sea-700);
  margin:0 0 1.1em;
}
.dark .eyebrow,.navy .eyebrow,.hero .eyebrow{color:#7FB8CE}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:100;background:rgba(10,28,43,.97);
  backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line-dark);
}
.topbar .inner{
  max-width:var(--w);margin:0 auto;padding:0 var(--gut);
  display:flex;align-items:center;gap:22px;min-height:66px;
}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none;font-family:var(--f-head);font-weight:600;letter-spacing:.02em;font-size:.95rem;white-space:nowrap}
.brand .mark{
  width:26px;height:26px;border:1.5px solid #7FB8CE;color:#7FB8CE;border-radius:2px;
  display:grid;place-items:center;font-size:.76rem;font-weight:700;flex:none;
}
.brand b{font-weight:400;color:#AFC4D1}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{
  color:#CBD8E1;text-decoration:none;font-size:.9rem;font-family:var(--f-head);
  font-weight:500;padding:6px 0;border-bottom:2px solid transparent;white-space:nowrap;
}
.nav a:hover{color:#fff}
.nav a[aria-current="page"]{color:#fff;border-bottom-color:var(--sea)}
.bar-actions{display:flex;align-items:center;gap:12px}
.lang{
  background:none;border:1px solid #2E4C66;color:#CBD8E1;font-family:var(--f-head);
  font-weight:600;font-size:.76rem;letter-spacing:.07em;padding:7px 11px;border-radius:2px;cursor:pointer;
}
.lang:hover{border-color:#7FB8CE;color:#fff}
.menu-btn{display:none;background:none;border:1px solid #2E4C66;border-radius:2px;padding:8px 10px;cursor:pointer}
.menu-btn span{display:block;width:18px;height:1.5px;background:#CBD8E1;margin:3.5px 0}

@media (max-width:940px){
  .menu-btn{display:block;margin-left:auto}
  .nav{
    position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;
    background:var(--navy);border-bottom:1px solid var(--line-dark);padding:8px var(--gut) 18px;
  }
  .nav[hidden]{display:none}
  .nav a{padding:13px 0;border-bottom:1px solid #16344B;font-size:1rem}
  .nav a[aria-current="page"]{border-bottom-color:#16344B;color:#7FB8CE}
  .bar-actions{margin-left:0;order:3}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:9px;font-family:var(--f-head);font-weight:600;
  font-size:.92rem;padding:13px 22px;border-radius:2px;text-decoration:none;
  background:var(--sea);color:#fff;border:1px solid var(--sea);transition:background .16s,border-color .16s;
}
.btn:hover{background:var(--sea-700);border-color:var(--sea-700);color:#fff}
.btn.ghost{background:transparent;color:var(--navy);border-color:#B9C7D1}
.btn.ghost:hover{background:var(--offwhite);color:var(--navy);border-color:var(--navy)}
.btn.light{background:#fff;color:var(--navy);border-color:#fff}
.btn.light:hover{background:#E6EDF1;color:var(--navy)}
.btn.onnavy{background:transparent;color:#fff;border-color:#3D6480}
.btn.onnavy:hover{background:#12314700;border-color:#7FB8CE;color:#fff}
.btn.sm{padding:9px 15px;font-size:.82rem}
@media (max-width:640px){.btn.sm{display:none}}

/* ---------- sections ---------- */
section{padding:84px 0}
section.tight{padding:60px 0}
.navy{background:var(--navy);color:#C6D4DE}
.navy h1,.navy h2,.navy h3{color:#fff}
.navy a{color:#8FC4D8}
.offw{background:var(--offwhite)}
.lede{font-size:1.16rem;color:var(--slate);max-width:64ch}
.navy .lede{color:#A9BECC}
.measure{max-width:70ch}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--navy);color:#fff;padding:0;overflow:hidden}
.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.42}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(10,28,43,.95) 0%,rgba(10,28,43,.82) 46%,rgba(10,28,43,.5) 100%);
}
.hero-inner{position:relative;max-width:var(--w);margin:0 auto;padding:118px var(--gut) 92px}
.hero h1{color:#fff;max-width:15ch;margin-bottom:.34em}
.hero .lede{color:#C9DAE5;font-size:1.22rem;max-width:56ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:13px;margin-top:34px}
.img-note{
  position:absolute;right:var(--gut);bottom:14px;z-index:2;
  font-size:.68rem;letter-spacing:.09em;text-transform:uppercase;
  color:#8FA9BA;font-family:var(--f-head);font-weight:600;
}
@media (max-width:640px){
  .hero-inner{padding:76px var(--gut) 56px}
  /* the caption must stay legible, so it becomes its own band rather than
     sitting on top of the photograph */
  .img-note{position:relative;z-index:3;display:block;margin:0;padding:13px var(--gut);
    background:#08161F;text-align:left;line-height:1.4}
}

/* stage strip */
.stage{border-top:1px solid var(--line-dark);background:#08161F}
.stage .inner{
  max-width:var(--w);margin:0 auto;padding:16px var(--gut);
  display:flex;align-items:flex-start;gap:12px;font-size:.84rem;color:#9FB6C4;
}
.dot{width:7px;height:7px;border-radius:50%;background:#7FB8CE;flex:none;margin-top:7px}

/* ---------- key facts ---------- */
.facts{display:grid;grid-template-columns:repeat(5,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.facts>div{background:var(--paper);padding:26px 20px}
.facts b{display:block;font-family:var(--f-head);font-size:1.62rem;font-weight:700;color:var(--navy);line-height:1.1;margin-bottom:7px;letter-spacing:-.02em}
.facts span{font-size:.85rem;color:var(--slate);display:block;line-height:1.45}
@media (max-width:900px){.facts{grid-template-columns:repeat(2,1fr)}.facts>div:last-child{grid-column:1/-1}}
@media (max-width:420px){.facts{grid-template-columns:1fr}.facts>div:last-child{grid-column:auto}}

/* ---------- generic grids ---------- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
@media (max-width:900px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;gap:34px}}
/* grid items default to min-width:auto, which lets wide tables blow out the
   track; min-width:0 lets .tbl-wrap scroll internally instead. */
.grid-2>*,.grid-3>*,.grid-4>*,.dgrid>*,.facts>*,.proof>*,.path>*{min-width:0}

/* ---------- cards ---------- */
.card{border:1px solid var(--line);padding:28px;background:var(--paper)}
.card h3{margin-bottom:.45em}
.card p{font-size:.95rem;color:var(--slate);margin-bottom:0}
.card ul{font-size:.93rem;color:var(--slate);margin-top:.9em;margin-bottom:0}
.navy .card{border-color:var(--line-dark);background:#0D2333}
.navy .card p,.navy .card ul{color:#A9BECC}

.numbered{counter-reset:n}
.numbered .card{position:relative;counter-increment:n}
.numbered .card::before{
  content:counter(n,decimal-leading-zero);
  font-family:var(--f-mono);font-size:.72rem;color:var(--sea);
  letter-spacing:.1em;display:block;margin-bottom:14px;
}

/* status chips */
.chip{
  display:inline-block;font-family:var(--f-head);font-size:.67rem;font-weight:700;
  letter-spacing:.11em;text-transform:uppercase;padding:4px 9px;border-radius:2px;
  border:1px solid;margin-bottom:12px;
}
.chip.concept{color:var(--slate);border-color:#C3CED6;background:#F5F8F9}
.chip.eng{color:var(--sea-700);border-color:#A8CCDA;background:var(--sea-100)}
.chip.proj{color:var(--amber);border-color:#DCC49C;background:#FAF4E9}

/* ---------- tables ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--line)}
table{border-collapse:collapse;width:100%;min-width:560px;font-size:.92rem;background:var(--paper)}
th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{
  background:var(--navy);color:#fff;font-family:var(--f-head);font-weight:600;
  font-size:.74rem;letter-spacing:.09em;text-transform:uppercase;border-bottom:none;
}
tbody tr:last-child td{border-bottom:none}
td.num{font-family:var(--f-mono);font-size:.87rem;white-space:nowrap}
tbody tr:nth-child(even) td{background:#FAFCFC}
.st{font-family:var(--f-head);font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--amber);white-space:nowrap}
.st.ok{color:var(--sea-700)}

/* a table dropped into a navy section keeps the light table surface by default,
   which leaves light body text on white — give it a dark surface instead */
.navy .tbl-wrap{border-color:var(--line-dark)}
.navy table{background:#0D2333;color:#BCCFDB}
.navy tbody tr:nth-child(even) td{background:#102A3C}
.navy td{border-bottom-color:var(--line-dark)}
.navy td strong{color:#fff}
.navy thead th{background:#061722}

/* ---------- notice / disclaimer ---------- */
.notice{
  border-left:3px solid var(--sea);background:var(--sea-100);
  padding:20px 24px;font-size:.93rem;color:var(--ink);margin:0 0 28px;
}
.notice strong{font-family:var(--f-head)}
.notice p:last-child{margin-bottom:0}
.notice.warn{border-left-color:var(--amber);background:#FAF4E9}
.navy .notice{background:#0E2636;border-left-color:#7FB8CE;color:#BCCFDB}

.stamp{
  font-family:var(--f-head);font-size:.7rem;font-weight:700;letter-spacing:.1em;
  text-transform:uppercase;color:var(--slate);border:1px solid var(--line);
  padding:7px 12px;display:inline-block;margin-top:16px;background:var(--paper);
}
.navy .stamp{color:#8FA9BA;border-color:var(--line-dark);background:#0D2333}

/* ---------- figures & diagrams ---------- */
figure{margin:0 0 34px}
.fig{border:1px solid var(--line);background:var(--paper);padding:22px}
.fig svg{width:100%;height:auto;display:block}
figcaption{
  font-size:.83rem;color:var(--slate);margin-top:12px;padding-top:12px;
  border-top:1px solid var(--line);
}
figcaption b{color:var(--navy);font-family:var(--f-head);font-weight:600}
.dgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
@media (max-width:900px){.dgrid{grid-template-columns:1fr}}

/* chart */
.chart-card{border:1px solid var(--line);background:var(--paper);padding:30px}
.chart-card h3{margin-bottom:6px}
.chart-sub{font-size:.9rem;color:var(--slate);margin-bottom:24px}
.chart-note{font-size:.82rem;color:var(--slate);margin-top:18px;padding-top:16px;border-top:1px solid var(--line)}

/* ---------- validated / to prove ---------- */
.proof{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.proof>div{background:var(--paper);padding:30px}
.proof h3{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.proof ul{list-style:none;padding:0;margin:0;font-size:.94rem}
.proof li{padding:9px 0 9px 26px;position:relative;border-bottom:1px solid #EEF2F4;color:var(--slate)}
.proof li:last-child{border-bottom:none}
.proof li::before{position:absolute;left:0;top:9px;font-family:var(--f-mono);font-size:.9rem}
.proof .yes li::before{content:"✓";color:var(--sea)}
.proof .no li::before{content:"○";color:var(--amber)}
@media (max-width:820px){.proof{grid-template-columns:1fr}}

/* ---------- pathway ---------- */
.path{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-dark);border:1px solid var(--line-dark)}
.path>div{background:var(--navy);padding:26px 22px}
.path b{display:block;font-family:var(--f-head);color:#fff;font-size:1rem;margin-bottom:8px}
.path span{font-size:.87rem;color:#9FB6C4;display:block}
.path i{font-family:var(--f-mono);font-style:normal;font-size:.7rem;color:#7FB8CE;letter-spacing:.1em;display:block;margin-bottom:12px}
@media (max-width:820px){.path{grid-template-columns:1fr}}

/* ---------- page header ---------- */
.phead{background:var(--navy);color:#fff;padding:78px 0 62px}
/* .phead is not .navy, so the base heading colour would make this invisible */
.phead h1,.phead h2,.phead h3{color:#fff}
.phead h1{max-width:20ch;margin-bottom:.3em}
.phead .lede{color:#B4C8D4}
.crumb{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;color:#7FB8CE;margin-bottom:22px}

/* ---------- form ---------- */
form{max-width:760px}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media (max-width:640px){.fgrid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;margin-bottom:18px}
.field.full{grid-column:1/-1}
label{font-family:var(--f-head);font-size:.82rem;font-weight:600;color:var(--navy);margin-bottom:7px}
.req{color:var(--amber);font-weight:400}
input,select,textarea{
  font-family:var(--f-body);font-size:.97rem;color:var(--ink);padding:12px 13px;
  border:1px solid #C6D1D9;border-radius:2px;background:var(--paper);width:100%;
}
input:focus,select:focus,textarea:focus{border-color:var(--sea);outline:2px solid var(--sea-100)}
textarea{resize:vertical;min-height:120px}
.hint{font-size:.81rem;color:var(--slate);margin-top:6px}

/* ---------- footer ---------- */
footer{background:var(--navy);color:#8FA9BA;padding:60px 0 34px;border-top:1px solid var(--line-dark)}
.fgrid4{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;margin-bottom:44px}
@media (max-width:820px){.fgrid4{grid-template-columns:1fr 1fr;gap:30px}}
@media (max-width:480px){.fgrid4{grid-template-columns:1fr}}
footer h4{color:#fff;font-size:.74rem;letter-spacing:.11em;text-transform:uppercase;margin-bottom:14px;font-weight:700}
footer ul{list-style:none;padding:0;margin:0;font-size:.89rem}
footer li{margin-bottom:9px}
footer a{color:#A9BECC;text-decoration:none}
footer a:hover{color:#fff;text-decoration:underline}
.foot-bottom{border-top:1px solid var(--line-dark);padding-top:22px;font-size:.81rem;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}
.foot-note{font-size:.81rem;color:#7A93A3;max-width:62ch;margin-top:14px}

/* ---------- misc ---------- */
.src{font-size:.83rem;color:var(--slate)}
.src ol{padding-left:1.3em}
.src li{margin-bottom:9px}
.kpi{font-family:var(--f-mono);font-size:.86rem;color:var(--sea-700)}
hr{border:none;border-top:1px solid var(--line);margin:54px 0}
.navy hr{border-top-color:var(--line-dark)}
.center{text-align:center}
.mt0{margin-top:0}