/* ==========================================================================
   MIZEN MARINE — design system
   Palette rhymes with the product itself: the blue hull, the orange hull,
   marine safety-signal orange. Type is Barlow (highway/marine signage lineage).
   ========================================================================== */

:root{
  /* --- colour (4 core + derived neutrals) --- */
  --ink:#0B1E25;            /* deep marine near-black */
  --ink-80:rgba(11,30,37,.80);
  --ink-55:rgba(11,30,37,.55);
  --ink-30:rgba(11,30,37,.30);
  --hull:#0C5F7E;           /* marine blue — matches the blue hull */
  --hull-dk:#08485F;
  --hull-lt:#E6EFF3;
  --signal:#FF6A00;         /* signal orange — matches the orange hull */
  --signal-dk:#D95600;
  --signal-lt:#FFF1E6;
  --paper:#F2F5F4;          /* cool off-white */
  --paper-dk:#E5EAE9;
  --white:#FFFFFF;

  /* --- type --- */
  --display:"Barlow Condensed","Oswald","Arial Narrow",sans-serif;
  --body:"Barlow","Source Sans 3",-apple-system,sans-serif;
  --mono:ui-monospace,"SF Mono","Cascadia Mono",Menlo,monospace;

  /* --- scale --- */
  --step--1:clamp(.82rem,.8rem + .1vw,.88rem);
  --step-0:clamp(1rem,.97rem + .15vw,1.08rem);
  --step-1:clamp(1.15rem,1.1rem + .25vw,1.3rem);
  --step-2:clamp(1.4rem,1.3rem + .5vw,1.75rem);
  --step-3:clamp(1.8rem,1.6rem + .9vw,2.5rem);
  --step-4:clamp(2.4rem,2rem + 2vw,4rem);
  --step-5:clamp(3rem,2.2rem + 4vw,5.6rem);

  /* --- space --- */
  --s1:.25rem; --s2:.5rem; --s3:.75rem; --s4:1rem;
  --s5:1.5rem; --s6:2rem; --s7:3rem; --s8:4rem; --s9:6rem; --s10:8rem;

  --radius:3px;
  --rule:1px solid var(--paper-dk);
  --maxw:1240px;
  --ease:cubic-bezier(.16,1,.3,1);
}

/* ---------- reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:var(--step-0);line-height:1.62;
  font-weight:400;text-wrap:pretty;-webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* belt and braces against horizontal overflow on small screens: any element
   that tries to exceed the viewport is clipped rather than widening the page */
html{overflow-x:hidden}
@media(max-width:520px){
  .wrap{padding-inline:1rem}
  .specstrip__cell{padding:.9rem 1rem}
  .deflist li{grid-template-columns:auto minmax(0,1fr);gap:.75rem}
  .plate__row{grid-template-columns:minmax(0,1fr) auto;gap:.6rem}
  .stack__row{grid-template-columns:3.4rem minmax(0,1fr);gap:.75rem}
  .model__hd{flex-wrap:wrap;gap:.4rem}
}
img,svg,video{display:block;max-width:100%;height:auto}
button,input,textarea,select{font:inherit;color:inherit}
a{color:var(--hull);text-decoration-thickness:1px;text-underline-offset:.22em}
a:hover{color:var(--signal-dk)}
h1,h2,h3,h4{margin:0;font-family:var(--display);font-weight:600;line-height:1.02;
  letter-spacing:-.005em;text-wrap:balance}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2.5px solid var(--signal);outline-offset:3px;border-radius:2px}

/* ---------- layout ---------- */
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,4vw,3rem)}
.band{padding-block:clamp(3.5rem,7vw,7rem)}
.band--tight{padding-block:clamp(2.5rem,4vw,4rem)}
.band--ink{background:var(--ink);color:var(--paper)}
.band--ink h2,.band--ink h3{color:var(--white)}
.band--white{background:var(--white)}
.band--paper{background:var(--paper)}
.band--hull{background:var(--hull);color:#DCE9EF}
.band--hull h2,.band--hull h3{color:#fff}

.grid{display:grid;gap:clamp(1.5rem,3vw,3rem)}
@media(min-width:900px){
  .g2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .g3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .g4{grid-template-columns:repeat(4,minmax(0,1fr))}
  .g-hero{grid-template-columns:1.05fr .95fr;align-items:center}
  .g-asym{grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr)}
}

/* ---------- typography helpers ---------- */
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-55)}
.band--ink .eyebrow,.band--hull .eyebrow{color:rgba(255,255,255,.62)}
.lede{font-size:var(--step-1);line-height:1.55;color:var(--ink-80);max-width:62ch}
.band--ink .lede,.band--hull .lede{color:rgba(255,255,255,.82)}
.muted{color:var(--ink-55);font-size:var(--step--1)}
.rule{border:0;border-top:var(--rule);margin:0}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(242,245,244,.9);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--paper-dk)}
/* flex must be allowed to wrap: on a 390px phone the logo plus the nav is wider
   than the viewport, and an unwrapped flex row would widen the whole document. */
.site-header .wrap{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem 1rem;
  min-height:62px;padding-block:.5rem}
.logo{display:flex;align-items:baseline;gap:.55rem;font-family:var(--display);
  font-weight:700;font-size:1.32rem;letter-spacing:.02em;color:var(--ink);
  text-decoration:none;white-space:nowrap;min-width:0}
.logo b{color:var(--signal)}
.logo span{font-family:var(--mono);font-size:.62rem;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-55);font-weight:500}
.nav{margin-left:auto;display:flex;align-items:center;justify-content:flex-end;
  flex-wrap:wrap;gap:.5rem 1rem;min-width:0}
.nav a{font-size:var(--step--1);color:var(--ink-80);text-decoration:none;font-weight:500}
.nav a:hover{color:var(--signal-dk)}
@media(max-width:760px){
  .nav a.opt{display:none}
  .site-header .wrap{row-gap:.4rem}
  .nav{gap:.5rem .85rem}
}
@media(max-width:420px){
  .logo span{display:none}
  .nav{gap:.4rem .7rem}
  .nav .btn--sm{padding-inline:.85rem}
}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  min-height:48px;padding:.72rem 1.5rem;border:1.5px solid transparent;
  border-radius:var(--radius);font-family:var(--display);font-weight:600;
  font-size:1.06rem;letter-spacing:.02em;text-decoration:none;cursor:pointer;
  transition:transform .18s var(--ease),background .18s,color .18s,border-color .18s}
.btn--primary{background:var(--signal);color:#fff}
.btn--primary:hover{background:var(--signal-dk);color:#fff;transform:translateY(-1px)}
.btn--ghost{border-color:var(--ink-30);color:var(--ink);background:transparent}
.btn--ghost:hover{border-color:var(--ink);background:rgba(11,30,37,.05);color:var(--ink)}
/* ghost on dark surfaces: hero, ink bands and the hull band */
.hero .btn--ghost,
.band--ink .btn--ghost,
.band--hull .btn--ghost{border-color:rgba(255,255,255,.42);color:#fff}
.hero .btn--ghost:hover,
.band--ink .btn--ghost:hover,
.band--hull .btn--ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.btn--sm{min-height:40px;padding:.45rem 1.05rem;font-size:.96rem}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- hero ---------- */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero__media{position:absolute;inset:0;z-index:0}
.hero__media img{width:100%;height:100%;object-fit:cover;object-position:58% 50%}
.hero__media::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(8,22,28,.94) 0%,rgba(8,22,28,.82) 38%,
    rgba(8,22,28,.38) 68%,rgba(8,22,28,.5) 100%)}
.hero .wrap{position:relative;z-index:1;padding-block:clamp(4rem,11vw,8.5rem)}
.hero__inner{max-width:44rem}
.hero h1{font-size:var(--step-5);font-weight:700;margin:.9rem 0 1.3rem;color:#fff}
.hero__sub{font-size:clamp(1.02rem,.98rem + .3vw,1.22rem);line-height:1.58;
  color:rgba(255,255,255,.86);max-width:38rem}
.hero__cta{display:flex;gap:.85rem;flex-wrap:wrap;margin-top:2rem}

/* spec strip */
.specstrip{margin-top:clamp(2.5rem,5vw,3.5rem);border-top:1px solid rgba(255,255,255,.2)}
.specstrip__grid{display:grid;grid-template-columns:repeat(2,1fr);
  border-left:1px solid rgba(255,255,255,.2)}
@media(min-width:760px){.specstrip__grid{grid-template-columns:repeat(4,1fr)}}
.specstrip__cell{padding:1.15rem 1.25rem;border-right:1px solid rgba(255,255,255,.2);
  border-bottom:1px solid rgba(255,255,255,.2)}
.specstrip__v{font-family:var(--display);font-weight:700;
  font-size:clamp(1.9rem,1.5rem + 1.4vw,2.7rem);line-height:1;color:#fff;
  font-variant-numeric:tabular-nums;letter-spacing:-.01em}
.specstrip__v i{font-family:var(--body);font-style:normal;font-size:.62em;
  font-weight:500;color:rgba(255,255,255,.6);margin-left:.22rem}
.specstrip__k{margin-top:.5rem;font-size:.82rem;line-height:1.42;
  color:rgba(255,255,255,.66)}

/* ---------- section heads ---------- */
.sechead{max-width:52rem;margin-bottom:clamp(2rem,4vw,3.2rem)}
.sechead h2{font-size:var(--step-4);margin-top:.7rem}
.sechead--wide{max-width:none}

/* ---------- figure ---------- */
.fig{position:relative;background:var(--paper-dk);border-radius:var(--radius);overflow:hidden}
.fig img{width:100%;height:100%;object-fit:cover}
.fig figcaption{position:absolute;left:0;bottom:0;right:0;padding:.7rem 1rem;
  background:linear-gradient(transparent,rgba(8,22,28,.82));color:#fff;
  font-size:.78rem;letter-spacing:.01em}
.fig--tall{aspect-ratio:4/5}
.fig--wide{aspect-ratio:16/9}
.fig--sq{aspect-ratio:1/1}

/* ---------- builders plate (signature element) ---------- */
.plate{border:1.5px solid var(--ink);background:var(--white);border-radius:var(--radius)}
.plate__hd{display:flex;justify-content:space-between;align-items:center;gap:1rem;
  padding:.6rem .9rem;background:var(--ink);color:#fff;
  font-family:var(--mono);font-size:.66rem;letter-spacing:.16em;text-transform:uppercase}
.plate__hd em{font-style:normal;color:rgba(255,255,255,.6)}
.plate__rows{display:grid}
.plate__row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1rem;
  align-items:baseline;padding:.72rem .9rem;border-bottom:1px solid var(--paper-dk)}
.plate__row:last-child{border-bottom:0}
.plate__row dt{font-size:.86rem;color:var(--ink-55);margin:0}
.plate__row dd{margin:0;font-family:var(--display);font-weight:600;
  font-size:1.1rem;font-variant-numeric:tabular-nums;text-align:right}

/* ---------- 3-layer stack diagram ---------- */
.stack{display:grid;gap:.5rem}
.stack__row{display:grid;grid-template-columns:5.2rem minmax(0,1fr);gap:1rem;align-items:start}
.stack__bar{height:44px;border-radius:2px;border:1px solid var(--ink-30);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:.7rem;color:var(--ink);
  background:repeating-linear-gradient(135deg,rgba(11,30,37,.14) 0 3px,transparent 3px 7px)}
.stack__bar--core{background:var(--hull-lt);
  border-color:var(--hull);color:var(--hull-dk);font-weight:600}
.stack__bar--skin{background:var(--signal-lt);border-color:var(--signal)}
.stack__meta h3{font-size:1.22rem;font-family:var(--display)}
.stack__meta p{font-size:.87rem;color:var(--ink-55);line-height:1.5;margin-top:.2rem}

/* ---------- generic content lists ---------- */
.deflist{display:grid;border-top:var(--rule)}
.deflist li{display:grid;grid-template-columns:auto minmax(0,1fr);gap:1rem;
  padding:1.05rem 0;border-bottom:var(--rule)}
.deflist .n{font-family:var(--mono);font-size:.72rem;color:var(--signal-dk);
  padding-top:.28rem;letter-spacing:.05em}
.deflist h3{font-size:1.3rem;margin-bottom:.3rem}
.deflist p{color:var(--ink-80);font-size:.95rem}
.band--ink .deflist{border-top-color:rgba(255,255,255,.16)}
.band--ink .deflist li{border-bottom-color:rgba(255,255,255,.16)}
.band--ink .deflist p{color:rgba(255,255,255,.74)}
.band--ink .deflist h3{color:#fff}
.band--ink .deflist .n{color:var(--signal)}

/* ---------- model cards ---------- */
.models{display:grid;gap:1.25rem}
@media(min-width:860px){.models{grid-template-columns:repeat(3,minmax(0,1fr))}}
.model{display:flex;flex-direction:column;background:var(--white);
  border:1px solid var(--paper-dk);border-radius:var(--radius);overflow:hidden;
  transition:border-color .2s,box-shadow .2s,transform .2s var(--ease)}
.model:hover{border-color:var(--ink-30);box-shadow:0 10px 30px -14px rgba(11,30,37,.3);
  transform:translateY(-2px)}
.model--lead{border-color:var(--signal);box-shadow:0 0 0 1px var(--signal)}
.model__hd{padding:1.05rem 1.15rem .85rem;border-bottom:var(--rule);
  display:flex;align-items:baseline;justify-content:space-between;gap:.7rem}
.model__code{font-family:var(--display);font-weight:700;font-size:1.75rem;line-height:1}
.model__pos{font-family:var(--mono);font-size:.68rem;letter-spacing:.09em;
  text-transform:uppercase;color:var(--signal-dk);text-align:right}
.model__img{aspect-ratio:4/3;background:var(--paper-dk)}
.model__img img{width:100%;height:100%;object-fit:cover}
.model__body{padding:1.1rem 1.15rem;flex:1;display:flex;flex-direction:column;gap:.9rem}
.model__use{font-size:.9rem;color:var(--ink-80)}
.model__spec{display:grid;gap:0;border-top:var(--rule)}
.model__spec div{display:flex;justify-content:space-between;gap:.8rem;
  padding:.46rem 0;border-bottom:var(--rule);font-size:.86rem}
.model__spec dt{color:var(--ink-55);margin:0}
.model__spec dd{margin:0;font-family:var(--display);font-weight:600;
  font-size:.98rem;font-variant-numeric:tabular-nums}
.model__note{font-size:.76rem;color:var(--ink-55);margin-top:.1rem}

/* ---------- craft list ---------- */
.craft{display:grid;gap:1.5rem 2rem}
@media(min-width:700px){.craft{grid-template-columns:repeat(2,minmax(0,1fr))}}
.craft li{padding-top:1rem;border-top:2px solid var(--ink)}
.band--ink .craft li{border-top-color:var(--signal)}
.craft h3{font-size:1.28rem;margin-bottom:.35rem}
.craft p{font-size:.92rem;color:var(--ink-80)}
.band--ink .craft p{color:rgba(255,255,255,.74)}

/* ---------- faq ---------- */
.faq{border-top:var(--rule);max-width:56rem}
.faq details{border-bottom:var(--rule)}
.faq summary{display:flex;align-items:baseline;gap:1rem;cursor:pointer;
  padding:1.15rem 0;font-family:var(--display);font-weight:600;
  font-size:clamp(1.08rem,1rem + .3vw,1.34rem);list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";margin-left:auto;font-family:var(--body);
  font-weight:400;font-size:1.5rem;line-height:1;color:var(--signal);
  transition:transform .2s var(--ease)}
.faq details[open] summary::after{content:"–"}
.faq summary:hover{color:var(--hull)}
.faq .a{padding:0 0 1.35rem;max-width:64ch;color:var(--ink-80);font-size:.96rem}

/* ---------- form ---------- */
.capture{display:grid;gap:1.25rem}
@media(min-width:820px){.capture{grid-template-columns:minmax(0,1fr) minmax(0,.9fr)}}
.form{display:grid;gap:.7rem}
.form__row{display:grid;gap:.7rem}
@media(min-width:560px){.form__row--2{grid-template-columns:1fr 1fr}}
.field{display:grid;gap:.32rem}
.field label{font-family:var(--mono);font-size:.68rem;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-55)}
.field input,.field select,.field textarea{
  min-height:48px;padding:.62rem .8rem;background:var(--white);
  border:1px solid var(--ink-30);border-radius:var(--radius);font-size:1rem}
.field textarea{min-height:110px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{
  border-color:var(--hull);outline:2px solid var(--hull-lt);outline-offset:0}
.field input:user-invalid{border-color:#B3261E;background:#FDF3F2}
.form__note{font-size:.8rem;color:var(--ink-55)}
.form__ok{display:none;padding:1rem 1.15rem;border:1px solid var(--signal);
  background:var(--signal-lt);border-radius:var(--radius);font-size:.92rem}
.form__ok[data-show="1"]{display:block}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.7);
  padding-block:clamp(3rem,5vw,4.5rem) 2rem;font-size:.9rem}
.site-footer h3{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;
  text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:.9rem;font-weight:500}
.site-footer a{color:rgba(255,255,255,.82);text-decoration:none}
.site-footer a:hover{color:var(--signal);text-decoration:underline}
.foot-grid{display:grid;gap:2rem}
@media(min-width:760px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr}}
.foot-grid ul{display:grid;gap:.5rem}
.foot-bot{margin-top:3rem;padding-top:1.5rem;border-top:1px solid rgba(255,255,255,.15);
  display:flex;flex-wrap:wrap;gap:1rem 2rem;justify-content:space-between;
  font-size:.8rem;color:rgba(255,255,255,.52)}

/* ---------- legality / policy pages ---------- */
.legal{max-width:75ch}
.legal h2{font-size:var(--step-2);margin:2.6rem 0 .9rem}
.legal h3{font-size:var(--step-1);margin:1.9rem 0 .6rem}
.legal p,.legal li{margin-bottom:.85rem;color:var(--ink-80)}
.legal ul{list-style:disc;padding-left:1.3rem}
.legal ul li{margin-bottom:.5rem}
.legal table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.9rem}
.legal th,.legal td{border:1px solid var(--paper-dk);padding:.6rem .75rem;text-align:left}
.legal th{background:var(--paper-dk);font-weight:600}
.callout{border-left:3px solid var(--signal);background:var(--signal-lt);
  padding:1rem 1.2rem;margin:1.4rem 0;border-radius:0 var(--radius) var(--radius) 0;
  font-size:.94rem}
.callout strong{display:block;margin-bottom:.3rem}
.placeholder{background:var(--signal-lt);border-bottom:1.5px dotted var(--signal);
  padding:0 .2em;font-family:var(--mono);font-size:.9em;color:var(--signal-dk)}

/* ---------- motion: one orchestrated reveal ----------
   Progressive enhancement: content is visible by default. The hidden state is
   only applied once JS confirms it can drive the reveal, so a JS failure or a
   crawler that never fires IntersectionObserver still sees every image. */
.rise{opacity:1;transform:none}
html.js-reveal .rise{opacity:0;transform:translateY(16px)}
html.js-reveal .rise.in{
  opacity:1;transform:none;
  transition:opacity .7s var(--ease),transform .7s var(--ease)}
@media (prefers-reduced-motion:reduce){
  html.js-reveal .rise{opacity:1;transform:none}
}

/* ---------- utilities ---------- */
.stack-2{display:grid;gap:.75rem}
.row{display:flex;flex-wrap:wrap;gap:.8rem;align-items:center}
.pill{display:inline-flex;align-items:center;gap:.4rem;padding:.28rem .68rem;
  border:1px solid var(--ink-30);border-radius:100px;font-size:.76rem;
  font-family:var(--mono);letter-spacing:.05em;color:var(--ink-80)}
.band--ink .pill{border-color:rgba(255,255,255,.3);color:rgba(255,255,255,.8)}
.sr{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0 0 0 0);white-space:nowrap;border:0}
.print-only{display:none}
/* ---------- language switcher ---------- */
.langsw{
  display:inline-flex;align-items:center;gap:.15rem;
  margin-right:.4rem;padding:.12rem;
  border:1px solid var(--ink-30);border-radius:100px;
  font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;line-height:1}
.langsw a,.langsw__on{
  padding:.3rem .5rem;border-radius:100px;text-decoration:none;white-space:nowrap}
.langsw a{color:var(--ink-55)}
.langsw a:hover{color:var(--signal-dk);background:rgba(12,95,126,.07)}
.langsw__on{background:var(--ink);color:#fff;font-weight:600}
@media(max-width:760px){
  .langsw{margin-right:.2rem}
  .langsw a,.langsw__on{padding:.28rem .38rem;font-size:.64rem}
}

/* ---------- manual gallery (spec drawings from the factory handbook) ---------- */
.gal{display:grid;gap:1.1rem;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));
  margin-top:2rem}
.gal figure{margin:0;background:var(--white);border:1px solid var(--line);
  border-radius:4px;overflow:hidden;display:flex;flex-direction:column}
.gal img{width:100%;height:228px;object-fit:contain;background:var(--white);
  padding:.7rem;display:block}
.gal figcaption{padding:.85rem 1rem 1rem;border-top:1px solid var(--line);
  font-size:.85rem;color:var(--ink-55);line-height:1.55}
.gal figcaption strong{display:block;font-family:var(--display);font-size:1.04rem;
  color:var(--ink);font-weight:600;margin-bottom:.22rem;letter-spacing:.005em}
.band--ink .gal figure{background:var(--white);border-color:rgba(255,255,255,.25)}
.gal--wide{grid-template-columns:repeat(auto-fit,minmax(340px,1fr))}
.gal--wide img{height:300px}
@media(max-width:640px){
  .gal{grid-template-columns:1fr}
  .gal img{height:200px}
  .gal--wide img{height:240px}
}