/* ===========================================================================
   Stuttgart Instruments — static site
   Design system: brand gold accent, charcoal text, Nunito + Roboto.
   =========================================================================== */

/* ---- Fonts (self-hosted, no external requests) ---- */
@font-face{font-family:'Nunito';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/Nunito-latin_latin-ext-regular.woff2') format('woff2');}
@font-face{font-family:'Nunito';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/Nunito-latin_latin-ext-600.woff2') format('woff2');}
@font-face{font-family:'Nunito';font-style:normal;font-weight:700;font-display:swap;
  src:url('../fonts/Nunito-latin_latin-ext-700.woff2') format('woff2');}
@font-face{font-family:'Nunito Sans';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/NunitoSans-latin_latin-ext-regular.woff2') format('woff2');}
@font-face{font-family:'Nunito Sans';font-style:normal;font-weight:600;font-display:swap;
  src:url('../fonts/NunitoSans-latin_latin-ext-600.woff2') format('woff2');}
@font-face{font-family:'Nunito Sans';font-style:normal;font-weight:700;font-display:swap;
  src:url('../fonts/NunitoSans-latin_latin-ext-700.woff2') format('woff2');}
@font-face{font-family:'Roboto';font-style:normal;font-weight:400;font-display:swap;
  src:url('../fonts/Roboto-latin_latin-ext-regular.woff2') format('woff2');}
@font-face{font-family:'Roboto';font-style:normal;font-weight:500;font-display:swap;
  src:url('../fonts/Roboto-latin_latin-ext-500.woff2') format('woff2');}
@font-face{font-family:'Roboto';font-style:normal;font-weight:700;font-display:swap;
  src:url('../fonts/Roboto-latin_latin-ext-700.woff2') format('woff2');}

/* ---- Tokens ---- */
:root{
  --gold:#facc00;
  --gold-dark:#d9af00;
  --ink:#222426;
  --ink-soft:#515151;
  --muted:#7a7a7a;
  --bg:#ffffff;
  --bg-alt:#f5f3f1;
  --bg-grey:#e9e5e6;
  --dark:#1d1f21;
  --dark-2:#26292c;
  --line:#e3e0dd;
  --radius:14px;
  --radius-sm:8px;
  --shadow:0 10px 30px rgba(0,0,0,.08);
  --shadow-sm:0 4px 14px rgba(0,0,0,.06);
  --maxw:1180px;
  --head:'Nunito Sans',system-ui,sans-serif;
  --body:'Roboto',system-ui,sans-serif;
  --header-h:80px;
}

/* ---- Reset ---- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  margin:0;font-family:var(--body);color:var(--ink);background:var(--bg);
  font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;}
h1,h2,h3,h4,h5,h6{font-family:var(--head);font-weight:700;line-height:1.15;color:var(--ink);margin:0 0 .5em;}
h1{font-size:clamp(2.4rem,6vw,4rem);}
h2{font-size:clamp(1.8rem,4vw,2.6rem);}
h3{font-size:clamp(1.3rem,2.6vw,1.7rem);}
h4{font-size:1.15rem;}
p{margin:0 0 1rem;}
ul{margin:0 0 1rem;padding-left:1.1rem;}
li{margin:.25rem 0;}

/* ---- Layout helpers ---- */
.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,4vw,36px);}
.section{padding:clamp(48px,8vw,96px) 0;}
.section--alt{background:var(--bg-alt);}
.section--grey{background:var(--bg-grey);}
.section--dark{background:var(--dark);color:#e9e9ea;}
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4{color:#fff;}
.eyebrow{font-family:var(--head);font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  font-size:.8rem;color:var(--gold-dark);margin-bottom:.6rem;}
.section--dark .eyebrow{color:var(--gold);}
.lead{font-size:1.2rem;color:var(--ink-soft);max-width:62ch;}
.center{text-align:center;}
.center .lead{margin-inline:auto;}
.accent-bar{width:64px;height:5px;border-radius:99px;background:var(--gold);margin:0 0 1.5rem;}
.center .accent-bar{margin-inline:auto;}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:.5rem;font-family:var(--head);font-weight:700;
  font-size:1rem;padding:.8rem 1.6rem;border-radius:99px;border:2px solid transparent;cursor:pointer;
  transition:transform .15s ease,background .2s ease,color .2s ease,box-shadow .2s ease;}
.btn--primary{background:var(--gold);color:#1a1a1a;box-shadow:0 8px 20px rgba(250,204,0,.35);}
.btn--primary:hover{transform:translateY(-2px);background:var(--gold-dark);}
.btn--ghost{border-color:rgba(255,255,255,.55);color:#fff;}
.btn--ghost:hover{background:#fff;color:#1a1a1a;}
.btn--dark{background:var(--ink);color:#fff;}
.btn--dark:hover{transform:translateY(-2px);background:#000;}
.btn--sm{padding:.55rem 1.1rem;font-size:.92rem;}

/* ===========================================================================
   Header / Navigation (dark — matches original)
   =========================================================================== */
.site-header{position:sticky;top:0;z-index:50;background:#000;border-bottom:1px solid #1a1a1a;}
.site-header--dark .nav__menu a{color:#e9e5e6;}
.site-header--dark .nav__menu a:hover{color:#fff;}
.site-header--dark .nav__menu a[aria-current="page"]{
  color:#fff;background:transparent;box-shadow:inset 0 -3px 0 var(--gold);}
.site-header--dark .has-sub>a::after{border-color:#e9e5e6;}
.site-header--dark .nav__toggle{border-color:#444;background:#111;}
.site-header--dark .nav__toggle span,
.site-header--dark .nav__toggle span::before,
.site-header--dark .nav__toggle span::after{background:#e9e5e6;}
.nav{display:flex;align-items:center;justify-content:space-between;gap:2rem;min-height:var(--header-h);}
.nav__logo{display:flex;align-items:center;flex-shrink:0;}
.nav__logo img{height:48px;width:auto;max-width:min(300px,42vw);}
.nav__menu{display:flex;align-items:center;gap:.15rem;list-style:none;margin:0;padding:0;flex:1;justify-content:center;}
.nav__menu a{display:inline-block;padding:.65rem 1rem;font-family:var(--head);font-weight:400;
  font-size:1.05rem;color:var(--ink-soft);border-radius:0;transition:color .15s;}
.nav__menu a:hover{color:var(--ink);}
.nav__menu a[aria-current="page"]{color:var(--ink);box-shadow:inset 0 -3px 0 var(--gold);}
.nav__lang{display:flex;align-items:center;gap:.35rem;margin-left:.5rem;padding-left:.75rem;border-left:1px solid rgba(255,255,255,.15);}
.site-header--dark .nav__lang{border-left-color:#444;}
.nav__lang-link{font-family:var(--head);font-size:.95rem;font-weight:700;letter-spacing:.04em;padding:.5rem .55rem!important;color:var(--ink-soft)!important;}
.nav__lang-link.is-active,.nav__lang-link[aria-current="true"]{color:var(--gold)!important;box-shadow:none!important;}
.nav__lang-sep{opacity:.45;font-size:.85rem;user-select:none;}

/* dropdown */
.has-sub{position:relative;}
.has-sub>a::after{content:"";display:inline-block;width:.45em;height:.45em;margin-left:.45em;
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);}
.submenu{position:absolute;top:calc(100% + 8px);left:0;min-width:190px;list-style:none;margin:0;padding:.4rem;
  background:#fff;border:1px solid var(--line);border-radius:0;box-shadow:0 8px 24px rgba(0,0,0,.35);
  opacity:0;visibility:hidden;transform:translateY(8px);transition:.18s ease;}
.site-header--dark .submenu{background:#111;border-color:#333;}
.site-header--dark .submenu a{color:#e9e5e6;}
.site-header--dark .submenu a:hover{color:#fff;background:#1a1a1a;}
.has-sub:hover .submenu,.has-sub:focus-within .submenu{opacity:1;visibility:visible;transform:translateY(0);}
.submenu a{display:block;width:100%;}

.nav__cta{display:flex;align-items:center;gap:.75rem;}
.nav__toggle{display:none;width:46px;height:46px;border:1px solid var(--line);background:#fff;border-radius:10px;
  cursor:pointer;align-items:center;justify-content:center;}
.nav__toggle span,.nav__toggle span::before,.nav__toggle span::after{content:"";display:block;width:22px;height:2px;
  background:var(--ink);position:relative;transition:.2s;}
.nav__toggle span::before{position:absolute;top:-7px;}
.nav__toggle span::after{position:absolute;top:7px;}
.nav.is-open .nav__toggle span{background:transparent;}
.nav.is-open .nav__toggle span::before{top:0;transform:rotate(45deg);}
.nav.is-open .nav__toggle span::after{top:0;transform:rotate(-45deg);}

/* ===========================================================================
   Hero
   =========================================================================== */
.hero{position:relative;color:#fff;background:#111;overflow:hidden;}
.hero__bg{position:absolute;inset:0;background-size:cover;background-position:center 40%;
  filter:saturate(105%) brightness(.85);}
.hero::after{content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(0,0,0,.55) 0%,rgba(0,0,0,.25) 55%,rgba(0,0,0,.4) 100%);}
.hero__inner{position:relative;z-index:2;padding:clamp(56px,9vw,100px) 0 clamp(48px,7vw,88px);}
.hero--home .hero__inner{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(18px,4vw,36px);
  text-align:center;}
.hero h1{margin:0;font-size:clamp(2rem,4.5vw,2.85rem);font-weight:400;color:var(--gold);
  text-shadow:none;line-height:1.12;}
.hero .sub{font-family:var(--head);font-weight:400;font-size:clamp(1.2rem,2.6vw,1.75rem);
  color:#e9e5e6;margin-top:.25rem;}
.hero .hero__actions{margin-top:2rem;display:flex;gap:1rem;flex-wrap:wrap;justify-content:center;}

/* Full-width content bands (home — original proportions) */
.band--meet{background:var(--gold);color:#383838;padding:1.65rem 1rem 1.85rem;}
.band--meet__inner{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;width:100%;max-width:36rem;margin:0 auto;padding:0 1rem;box-sizing:border-box;}
.band--meet__title{font-size:1.85rem;font-weight:400;color:#383838;margin:0 0 .75rem;line-height:1.2;width:100%;}
.band--meet__graphic{display:block;width:auto;height:auto;max-width:min(400px,88vw);
  max-height:105px;object-fit:contain;margin:0 auto .5rem;}
.band--meet__brand{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:.5rem;margin:0 auto .5rem;width:100%;}
.band--meet__logo-spie{height:clamp(28px,5vw,40px);width:auto;display:block;flex-shrink:0;}
.band--meet__logo-pw{height:clamp(44px,8vw,58px);width:auto;max-width:min(300px,78vw);display:block;flex-shrink:0;}
.band--meet__details{display:flex;flex-direction:column;align-items:center;width:100%;}
.band--meet__event-name{margin:0 0 .35rem;font-family:var(--head);font-size:clamp(2rem,5vw,2.75rem);
  font-weight:700;color:#1a1a1a;line-height:1.1;letter-spacing:-.02em;}
.band--meet__place,.band--meet__date{margin:0;font-family:var(--head);font-size:1.05rem;
  color:#383838;font-weight:400;line-height:1.45;width:100%;}
.band--meet__date{margin-top:0;}
.band--meet__venue{margin:.35rem 0 0;font-size:.92rem;color:#515151;width:100%;}
.band--meet__venue a{color:#1a1a1a;font-weight:700;text-decoration:underline;text-underline-offset:3px;}
.band--meet__venue a:hover{color:#000;}
.band--intro{background:#fff;padding:clamp(2.75rem,5vw,4.5rem) 1rem;}
.band--intro__text{max-width:900px;margin:0 auto;text-align:center;font-size:1.05rem;
  line-height:1.72;color:#515151;}

/* page hero (interior) */
.page-hero{position:relative;background:var(--dark);color:#fff;padding:clamp(70px,11vw,130px) 0 clamp(48px,7vw,80px);}
.page-hero .crumbs{font-size:.9rem;color:rgba(255,255,255,.6);margin-bottom:1rem;}
.page-hero .crumbs a:hover{color:var(--gold);}
.page-hero h1{margin:0;color:var(--gold);font-weight:400;}
.page-hero .tagline{font-family:var(--head);font-weight:400;color:#e9e5e6;font-size:clamp(1.1rem,2.4vw,1.5rem);margin-top:.4rem;}

/* ===========================================================================
   Grids & cards
   =========================================================================== */
.grid{display:grid;gap:clamp(20px,3vw,34px);}
.grid--2{grid-template-columns:repeat(2,1fr);}
.grid--3{grid-template-columns:repeat(3,1fr);}
.grid--4{grid-template-columns:repeat(4,1fr);}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,64px);align-items:center;}
.split--media-first .split__media{order:-1;}

.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease;display:flex;flex-direction:column;}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.card__media{aspect-ratio:16/9;background:var(--bg-grey);overflow:hidden;}
.card__media img{width:100%;height:100%;object-fit:cover;}
.card__body{padding:1.4rem 1.5rem 1.6rem;display:flex;flex-direction:column;flex:1;}
.card__body h3{margin-bottom:.3rem;}
.card__body .meta{color:var(--gold-dark);font-family:var(--head);font-weight:700;font-size:.95rem;margin-bottom:.6rem;}
.card .btn{margin-top:auto;align-self:flex-start;}

/* feature list with check marks */
.checks{list-style:none;padding:0;margin:0;}
.checks li{position:relative;padding-left:2rem;margin:.6rem 0;}
.checks li::before{content:"";position:absolute;left:0;top:.45em;width:1.1rem;height:1.1rem;border-radius:50%;
  background:var(--gold);}
.checks li::after{content:"";position:absolute;left:.34rem;top:.62em;width:.36rem;height:.62rem;
  border-right:2px solid #1a1a1a;border-bottom:2px solid #1a1a1a;transform:rotate(45deg);}

.figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow-sm);}
.figure img{width:100%;}
.figure figcaption{padding:.7rem 1rem;font-size:.9rem;color:var(--muted);background:var(--bg-alt);}

.pill{display:inline-block;font-family:var(--head);font-weight:700;font-size:.85rem;
  background:rgba(250,204,0,.18);color:var(--gold-dark);padding:.25rem .8rem;border-radius:99px;}

/* stat row */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;}
.stat{text-align:center;}
.stat__num{font-family:var(--head);font-weight:700;font-size:clamp(1.6rem,3vw,2.2rem);color:var(--ink);}
.section--dark .stat__num{color:var(--gold);}
.stat__lbl{font-size:.95rem;color:var(--muted);}
.section--dark .stat__lbl{color:rgba(255,255,255,.7);}

/* application tiles */
.app-tile{position:relative;border-radius:var(--radius);overflow:hidden;min-height:230px;display:flex;
  align-items:flex-end;color:#fff;box-shadow:var(--shadow-sm);}
.app-tile img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;}
.app-tile::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.72));}
.app-tile__label{position:relative;z-index:2;padding:1.2rem 1.4rem;font-family:var(--head);font-weight:700;font-size:1.3rem;}

/* logos / partners */
.logos{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:clamp(28px,5vw,64px);}
.logos img{height:54px;width:auto;filter:grayscale(1);opacity:.7;transition:.2s;}
.logos img:hover{filter:none;opacity:1;}

/* ===========================================================================
   FAQ (accordion)
   =========================================================================== */
.faq{max-width:820px;margin-inline:auto;}
.faq__item{border:1px solid var(--line);border-radius:12px;margin-bottom:.8rem;background:#fff;overflow:hidden;}
.faq__q{width:100%;text-align:left;background:none;border:0;cursor:pointer;padding:1.1rem 1.3rem;
  font-family:var(--head);font-weight:700;font-size:1.08rem;color:var(--ink);display:flex;justify-content:space-between;gap:1rem;align-items:center;}
.faq__q::after{content:"+";font-size:1.5rem;color:var(--gold-dark);transition:transform .2s;}
.faq__item.open .faq__q::after{transform:rotate(45deg);}
.faq__a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.faq__a>div{padding:0 1.3rem 1.2rem;color:var(--ink-soft);}

/* ===========================================================================
   Applications page
   =========================================================================== */
.app-intro{padding-top:clamp(2.5rem,5vw,3.5rem);}
.spec-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem .65rem;
  list-style:none;margin:1.75rem 0 0;padding:0;}
.spec-chips li{font-family:var(--head);font-size:.88rem;font-weight:600;color:var(--ink-soft);
  background:var(--bg-alt);border:1px solid var(--line);padding:.4rem .85rem;border-radius:99px;}

.app-why{padding:clamp(2rem,4vw,3rem) 0;}
.app-split{padding:clamp(2rem,4vw,3rem) 0;}
.app-split-grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin-bottom:1.5rem;}
.app-split-card{display:block;padding:1.5rem 1.6rem;border-radius:var(--radius-sm);border:2px solid var(--line);
  text-decoration:none;color:inherit;transition:border-color .15s,box-shadow .15s;}
.app-split-card:hover{box-shadow:var(--shadow);}
.app-split-card--academic{background:linear-gradient(145deg,#fff 0%,#f8f6ef 100%);}
.app-split-card--academic:hover{border-color:var(--gold-dark);}
.app-split-card--industrial{background:linear-gradient(145deg,#fff 0%,#f0f2f5 100%);}
.app-split-card--industrial:hover{border-color:#6b7280;}
.app-split-card__label{font-family:var(--head);font-size:.75rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.1em;color:var(--gold-dark);}
.app-split-card--industrial .app-split-card__label{color:#4b5563;}
.app-split-card h2{margin:.35rem 0 .5rem;font-size:1.35rem;font-weight:600;line-height:1.25;}
.app-split-card p{margin:0;font-size:.92rem;color:var(--ink-soft);line-height:1.5;}

.app-pillar{border-top:4px solid var(--gold);}
.app-pillar--academic{background:var(--bg-alt);}
.app-pillar--industrial{background:#fff;border-top-color:#4b5563;}
.app-pillar__head{padding:clamp(2rem,4vw,2.75rem) 0 1rem;}
.app-pillar__head--industrial{background:linear-gradient(180deg,#eef1f4 0%,#fff 100%);}
.app-pillar__head h2{margin:.35rem 0 .75rem;font-weight:400;max-width:52ch;}
.app-subhead{font-size:1.2rem;font-weight:600;margin:0 0 .5rem;}
.app-scenarios--in-pillar{padding-top:1.5rem;padding-bottom:clamp(2.5rem,5vw,4rem);}

.app-page-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem 1rem;}
.app-page-nav a{font-family:var(--head);font-weight:600;font-size:.95rem;color:var(--ink-soft);
  text-decoration:none;padding:.35rem 0;border-bottom:2px solid transparent;}
.app-page-nav a:hover{color:var(--ink);border-bottom-color:var(--gold);}
.app-why-list{list-style:none;margin:1.5rem auto 0;padding:0;max-width:720px;display:grid;gap:.85rem;}
.app-why-list li{position:relative;padding-left:1.35rem;color:var(--ink-soft);line-height:1.55;}
.app-why-list li::before{content:"";position:absolute;left:0;top:.55rem;width:.55rem;height:.55rem;
  background:var(--gold);border-radius:2px;}

.app-published{padding:clamp(2rem,4vw,3rem) 0;border-top:1px solid var(--line);}
.app-scenarios{padding:clamp(2.5rem,5vw,4rem) 0;}
.app-scenario-note{font-size:.88rem;color:var(--muted);font-style:italic;margin:-.5rem 0 1.25rem;}
.app-scenario-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1rem;}
.app-scenario-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:1.2rem 1.25rem;display:flex;flex-direction:column;min-height:100%;}
.section--alt .app-scenario-card{background:var(--bg);}
.app-scenario-card h3{margin:0 0 .5rem;font-size:1.05rem;font-weight:600;line-height:1.35;}
.app-scenario-card > p{margin:0 0 1rem;font-size:.92rem;color:var(--ink-soft);flex:1;}
.app-scenario-card__foot{margin-top:auto;padding-top:.75rem;border-top:1px solid var(--line);}
.req-box--compact{padding:.85rem 1rem;margin-bottom:1rem;}
.req-box--compact p{font-size:.9rem;}
.app-use-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:.75rem;}
.app-use-card{display:flex;flex-direction:column;gap:.35rem;padding:1rem 1.1rem;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius-sm);text-decoration:none;color:inherit;
  transition:border-color .15s,box-shadow .15s;}
.app-use-card:hover{border-color:var(--gold-dark);box-shadow:var(--shadow-sm);}
.app-use-card__n{font-family:var(--head);font-size:1.75rem;font-weight:700;color:var(--gold-dark);line-height:1;}
.app-use-card__title{font-family:var(--head);font-size:.92rem;font-weight:600;line-height:1.35;color:var(--ink);}

.app-use{padding:clamp(2.5rem,5vw,3.75rem) 0;border-top:1px solid var(--line);}
.app-use:nth-of-type(even){background:var(--bg-alt);}
.app-use__count{font-family:var(--head);font-size:.8rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.07em;color:var(--gold-dark);margin:0 0 .35rem;}
.app-use__head h2{margin:0 0 .75rem;font-weight:400;}
.app-use__lead{color:var(--ink-soft);max-width:68ch;margin:0 0 1.5rem;}
.app-use__grid{display:grid;grid-template-columns:1fr 1fr;gap:1.25rem;margin-bottom:1.75rem;}
.app-use__systems .technique-card__lbl{margin-bottom:.5rem;}
.app-use__featured h3{font-size:1rem;font-weight:600;margin:0 0 .85rem;}
.app-mini-pub-list{list-style:none;margin:0 0 1rem;padding:0;display:grid;gap:.75rem;}
.app-mini-pub{background:#fff;border:1px solid var(--line);border-left:3px solid var(--gold);
  border-radius:8px;padding:.85rem 1rem;font-size:.9rem;}
.app-use:nth-of-type(even) .app-mini-pub{background:var(--bg);}
.app-mini-pub strong{display:block;font-size:.95rem;line-height:1.35;margin-bottom:.25rem;color:var(--ink);}
.app-mini-pub span{display:block;color:var(--ink-soft);font-size:.85rem;line-height:1.4;margin-bottom:.2rem;}
.app-mini-pub em{display:block;font-style:normal;font-family:var(--head);font-size:.8rem;font-weight:700;color:var(--gold-dark);}

.app-field{padding:clamp(2.75rem,6vw,4.5rem) 0;border-top:1px solid var(--line);}
.app-field:nth-child(even){background:var(--bg-alt);}
.app-field__grid{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(24px,4vw,48px);align-items:start;margin-bottom:2.5rem;}
.app-field--flip .app-field__grid{direction:rtl;}
.app-field--flip .app-field__grid > *{direction:ltr;}
.app-field__visual img{width:100%;border-radius:var(--radius);box-shadow:var(--shadow-sm);}
.app-field__body h2{margin-bottom:.75rem;font-weight:400;}
.app-field__intro{color:var(--ink-soft);margin-bottom:1.25rem;}
.req-box{background:#fff;border:1px solid var(--line);border-left:4px solid var(--gold);
  border-radius:var(--radius-sm);padding:1rem 1.15rem;}
.app-field:nth-child(even) .req-box{background:var(--bg);}
.req-box strong{display:block;font-family:var(--head);font-size:.85rem;text-transform:uppercase;
  letter-spacing:.06em;color:var(--gold-dark);margin-bottom:.35rem;}
.req-box p{margin:0;font-size:.95rem;color:var(--ink-soft);}
.app-field__methods-title{font-size:1.15rem;margin:0 0 1.25rem;font-weight:600;}
.technique-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;}
.technique-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:1.15rem 1.2rem;display:flex;flex-direction:column;min-height:100%;}
.app-field:nth-child(even) .technique-card{background:var(--bg);}
.technique-card h4{margin:0 0 .45rem;font-size:1.02rem;line-height:1.35;font-weight:600;}
.technique-card p{margin:0 0 1rem;font-size:.92rem;color:var(--ink-soft);flex:1;}
.technique-card__foot{margin-top:auto;padding-top:.75rem;border-top:1px solid var(--line);}
.technique-card__lbl{display:block;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--muted);margin-bottom:.45rem;font-family:var(--head);font-weight:700;}
.product-pill{display:inline-block;font-family:var(--head);font-size:.82rem;font-weight:700;
  padding:.28rem .65rem;margin:.15rem .2rem .15rem 0;border-radius:99px;
  background:rgba(250,204,0,.22);color:var(--ink);border:1px solid rgba(250,204,0,.45);}
.product-pill:hover{background:var(--gold);}

.app-cta-mid .btn{margin:.35rem;}
.ref-toolbar{margin-bottom:1.5rem;}
.ref-filters{display:flex;flex-wrap:wrap;gap:.4rem;margin-bottom:1rem;}
.ref-filter{font-family:var(--head);font-size:.85rem;font-weight:600;padding:.45rem .85rem;
  border:1px solid var(--line);border-radius:99px;background:#fff;cursor:pointer;color:var(--ink-soft);}
.ref-filter:hover{border-color:var(--gold-dark);color:var(--ink);}
.ref-filter.is-active{background:var(--gold);border-color:var(--gold);color:#1a1a1a;}
.ref-search{display:block;margin-bottom:.75rem;}
.ref-search input{width:100%;max-width:420px;font:inherit;padding:.65rem 1rem;
  border:1px solid var(--line);border-radius:var(--radius-sm);}
.ref-search input:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(250,204,0,.2);}
.ref-count{font-size:.9rem;color:var(--muted);margin:0;}
.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;}
.pub.is-hidden{display:none;}

/* ===========================================================================
   Publications / references
   =========================================================================== */
.pub-list{list-style:none;padding:0;margin:0;display:grid;gap:1rem;}
.pub{border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:10px;background:#fff;
  padding:1.1rem 1.3rem;box-shadow:var(--shadow-sm);}
.pub h4{margin:0 0 .35rem;font-size:1.05rem;line-height:1.35;}
.pub .authors{font-size:.95rem;color:var(--ink-soft);margin:0 0 .3rem;}
.pub .ref{font-size:.9rem;color:var(--gold-dark);font-family:var(--head);font-weight:700;}

/* ===========================================================================
   Contact / forms
   =========================================================================== */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(28px,5vw,56px);align-items:start;}
.contact-info p{margin:.2rem 0 1rem;}
.contact-info .label{font-family:var(--head);font-weight:700;color:var(--gold-dark);display:block;font-size:.85rem;
  text-transform:uppercase;letter-spacing:.08em;}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,4vw,38px);box-shadow:var(--shadow-sm);}
.section--dark .form{background:var(--dark-2);border-color:#33373b;}
.field{margin-bottom:1.1rem;}
.field label{display:block;font-family:var(--head);font-weight:600;margin-bottom:.35rem;font-size:.95rem;}
.field .req{color:var(--gold-dark);}
.field input,.field textarea{width:100%;font:inherit;font-size:1rem;padding:.8rem 1rem;border:1px solid var(--line);
  border-radius:var(--radius-sm);background:#fff;color:var(--ink);transition:border .15s,box-shadow .15s;}
.section--dark .field input,.section--dark .field textarea{background:#1b1e20;border-color:#3a3e42;color:#fff;}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(250,204,0,.25);}
.field textarea{min-height:140px;resize:vertical;}
.field .error{color:#d33;font-size:.85rem;margin-top:.3rem;display:none;}
.field.invalid input,.field.invalid textarea{border-color:#d33;}
.field.invalid .error{display:block;}
.checkbox{display:flex;gap:.6rem;align-items:flex-start;font-size:.92rem;color:var(--ink-soft);}
.section--dark .checkbox{color:rgba(255,255,255,.75);}
.checkbox input{width:auto;margin-top:.25rem;}
.form__note{font-size:.85rem;color:var(--muted);margin-top:.5rem;}
.form-status{margin-top:1rem;padding:.9rem 1.1rem;border-radius:8px;font-size:.95rem;display:none;}
.form-status.ok{display:block;background:rgba(36,137,19,.12);color:#1c6b12;border:1px solid rgba(36,137,19,.3);}
.form-status.err{display:block;background:rgba(224,17,12,.1);color:#b21712;border:1px solid rgba(224,17,12,.3);}

/* ===========================================================================
   Footer
   =========================================================================== */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);padding:clamp(48px,7vw,72px) 0 2rem;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:2rem;}
.site-footer h5{font-family:var(--head);color:#fff;font-size:1rem;text-transform:uppercase;letter-spacing:.08em;margin:0 0 1rem;}
.site-footer ul{list-style:none;padding:0;margin:0;}
.site-footer li{margin:.45rem 0;}
.site-footer a:hover{color:var(--gold);}
.footer-logo{height:42px;width:auto;margin-bottom:1rem;}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:2.5rem;padding-top:1.5rem;
  display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.88rem;color:rgba(255,255,255,.55);}

/* ===========================================================================
   Utilities
   =========================================================================== */
.only-mobile{display:none;}
.mt-0{margin-top:0;}
.mb-0{margin-bottom:0;}
.maxw-prose{max-width:72ch;}
.text-soft{color:var(--ink-soft);}
.rounded-media{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);}

/* ===========================================================================
   Responsive
   =========================================================================== */
@media (max-width:960px){
  .grid--4{grid-template-columns:repeat(2,1fr);}
  .stats{grid-template-columns:repeat(2,1fr);gap:2rem 1rem;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:820px){
  .nav__menu{position:fixed;inset:var(--header-h) 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    justify-content:flex-start;background:#000;border-bottom:1px solid #333;padding:.6rem clamp(18px,4vw,36px) 1.2rem;
    box-shadow:var(--shadow);transform:translateY(-120%);transition:transform .25s ease;
    max-height:calc(100vh - var(--header-h));overflow:auto;}
  .nav.is-open .nav__menu{transform:translateY(0);}
  .site-header--dark .nav__menu a{color:#e9e5e6;}
  .nav__menu a{padding:.85rem .4rem;border-radius:6px;}
  .nav__menu a[aria-current="page"]{box-shadow:inset 3px 0 0 var(--gold);}
  .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;
    padding:0 0 .4rem 1rem;min-width:0;background:transparent;}
  .site-header--dark .submenu a{color:#ccc;}
  .has-sub>a::after{display:none;}
  .nav__toggle{display:inline-flex;}
  .only-mobile{display:block;}
  .nav__logo img{height:44px;}
}
@media (max-width:760px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr;}
  .split{grid-template-columns:1fr;}
  .split--media-first .split__media{order:0;}
  .contact-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  body{font-size:16px;}
  .app-use__grid{grid-template-columns:1fr;}
  .app-use-grid{grid-template-columns:1fr;}
  .app-scenario-grid{grid-template-columns:1fr;}
  .app-split-grid{grid-template-columns:1fr;}
  .app-page-nav{flex-direction:column;align-items:center;}
  .app-field__grid{grid-template-columns:1fr;}
  .app-field--flip .app-field__grid{direction:ltr;}
  .technique-grid{grid-template-columns:1fr;}
  .app-cta-mid .btn{display:flex;width:100%;justify-content:center;margin:.35rem 0;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important;}
}