/* Perihel — concept site. Sober light palette: warm white, graphite, one deep green accent. */
:root{
  --bg:#f5f5f2;
  --grey:#ecece7;
  --white:#fff;
  --ink:#1d2329;
  --mute:#55606b;
  --line:#d8d9d3;
  --accent:#1d5c47;
  --accent-dk:#144536;
  --gut:clamp(20px,4vw,48px);
  --sans:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --ease:cubic-bezier(.2,.7,.1,1);
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:84px}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
body{margin:0;background:var(--bg);color:var(--ink);font:400 17px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:clip}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,figure,dl,dd,ol,ul,caption{margin:0}
ol,ul{padding:0;list-style:none}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:fixed;left:16px;top:-60px;z-index:90;background:var(--ink);color:#fff;padding:10px 16px;text-decoration:none;font-weight:500}
.skip:focus{top:16px}
.wrap{max-width:1240px;margin:0 auto;padding:0 var(--gut)}

h1{font:600 clamp(2rem,3.2vw,3rem)/1.12 var(--sans);letter-spacing:-.02em;max-width:21ch;text-wrap:balance}
h2{font:600 clamp(1.7rem,2.6vw,2.4rem)/1.15 var(--sans);letter-spacing:-.015em;text-wrap:balance}
h3{font:600 1.2rem/1.3 var(--sans);letter-spacing:-.005em}
.lead{font-size:clamp(1.05rem,1.3vw,1.18rem);color:var(--mute);max-width:62ch;margin-top:14px;line-height:1.55}

/* buttons and links */
.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 24px;background:var(--accent);color:#fff;font:500 16px/1 var(--sans);text-decoration:none;white-space:nowrap;border:0;border-radius:3px;cursor:pointer;transition:background-color .2s}
.btn:hover{background:var(--accent-dk)}
.btn--big{height:54px;padding:0 32px}
.tlink{display:inline-flex;align-items:center;height:50px;font-weight:500;color:var(--accent);text-decoration:underline;text-underline-offset:5px;text-decoration-thickness:1.5px}
.tlink:hover{color:var(--accent-dk)}

/* ---------- header ---------- */
.head{position:fixed;inset:0 0 auto 0;z-index:50;background:var(--bg);border-bottom:1px solid var(--line)}
.head__in{max-width:1240px;margin:0 auto;padding:0 var(--gut);height:68px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;font:600 22px/1 var(--sans);letter-spacing:-.02em}
.brand__mark{width:30px;height:19px}
.nav{display:flex;align-items:center;gap:clamp(18px,2.2vw,34px)}
.nav a{position:relative;padding:8px 0;font-size:15px;text-decoration:none;color:var(--ink)}
.nav a::after{content:"";position:absolute;left:0;right:0;bottom:2px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:0 50%;transition:transform .3s var(--ease)}
.nav a:hover::after,.nav a[aria-current="page"]::after,.nav .dd.is-cur>a::after{transform:scaleX(1)}
.nav__contact{font-weight:600}
.head__menu{display:none;height:42px;padding:0 16px;background:none;border:1px solid var(--ink);border-radius:3px;font-size:15px;font-weight:500;cursor:pointer}

/* ---------- hero ---------- */
.hero{padding-top:68px}
.hero__grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);column-gap:clamp(36px,5.5vw,88px);align-items:center;padding-top:clamp(40px,7vh,84px);padding-bottom:clamp(40px,6vh,72px)}
.hero__sub{margin-top:22px;max-width:50ch;font-size:clamp(1.05rem,1.3vw,1.2rem);color:var(--mute)}
.hero__actions{display:flex;flex-wrap:wrap;align-items:center;gap:8px 26px;margin-top:30px}
.hero__list{margin-top:34px;padding-top:6px;border-top:1px solid var(--line);max-width:52ch}
.hero__list li{position:relative;padding:11px 0 11px 22px;font-size:15.5px;line-height:1.45;border-bottom:1px solid var(--line)}
.hero__list li::before{content:"";position:absolute;left:0;top:19px;width:8px;height:8px;background:var(--accent)}
.hero__fig{min-width:0}
.inst{position:relative;aspect-ratio:3/2;background:#3b4a35;border:1px solid var(--line)}
.scene{position:absolute;inset:0;overflow:hidden}
.scene__base{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.band{position:absolute;left:0;right:0;top:0;height:32%;overflow:hidden;transform:translate3d(0,-101%,0);will-change:transform;z-index:1}
.band__in{position:absolute;left:0;right:0;top:0;height:312.5%;will-change:transform}
.band::before,.band::after{content:"";position:absolute;left:0;right:0;height:2px;background:#fff;z-index:2}
.band::before{top:0}.band::after{bottom:0}
.band__tag{position:absolute;left:0;top:2px;z-index:3;background:#fff;color:var(--ink);font-size:13.5px;font-weight:500;line-height:1;padding:8px 12px 7px 10px}
.hero__ctl{display:flex;align-items:center;gap:16px;margin-top:14px}
.hero__ctl label{font-size:14.5px;font-weight:500;white-space:nowrap}
.hero__cap{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-top:10px;font-size:14px;color:var(--mute);line-height:1.45}
.key{display:flex;align-items:center;gap:8px;white-space:nowrap;color:var(--ink);font-variant-numeric:tabular-nums}
.key i{width:92px;height:9px;background:linear-gradient(90deg,#7a4a26,#a9793a,#d9c36a,#e9e49a,#a9d05a,#52a845,#1c6b34)}
.trust{display:flex;align-items:center;gap:12px 32px;flex-wrap:wrap;padding-top:22px;padding-bottom:26px;background:linear-gradient(var(--line),var(--line)) var(--gut) 0/calc(100% - 2 * var(--gut)) 1px no-repeat}
.trust p{font-size:14.5px;color:var(--mute)}
.trust ul{display:flex;flex-wrap:wrap;gap:6px 30px;font-weight:500;font-size:15.5px;color:#3a444e}

/* range inputs */
input[type=range]{--p:18%;-webkit-appearance:none;appearance:none;width:100%;height:30px;background:transparent;cursor:pointer;margin:0}
input[type=range]::-webkit-slider-runnable-track{height:4px;border-radius:2px;background:linear-gradient(var(--accent),var(--accent)) 0/var(--p,0%) 100% no-repeat,#c9cac3}
input[type=range]::-moz-range-track{height:4px;border-radius:2px;background:linear-gradient(var(--accent),var(--accent)) 0/var(--p,0%) 100% no-repeat,#c9cac3}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;margin-top:-9px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 0 0 1px var(--accent)}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:0 0 0 1px var(--accent)}
input[type=range]:focus-visible{outline:none}
input[type=range]:focus-visible::-webkit-slider-thumb{outline:3px solid var(--ink);outline-offset:2px}

/* ---------- sections ---------- */
.sec{padding:clamp(72px,10vw,120px) 0;border-top:1px solid var(--line)}
.sec--grey{background:var(--grey)}
.sec__head{margin-bottom:clamp(36px,5vw,60px)}
.sub{margin:clamp(48px,7vw,80px) 0 22px;font-size:1.5rem}

/* service chain */
.chain{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));border-top:3px solid var(--ink)}
.chain li{padding:22px 24px 0 0}
.chain li+li{padding-left:20px;border-left:1px solid var(--line)}
.chain p{margin-top:10px;font-size:15.5px;color:var(--mute);line-height:1.5}
.photos{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:clamp(20px,3vw,40px);margin-top:clamp(40px,6vw,72px);align-items:start}
.photos img{width:100%;object-fit:cover}
.photos__a img{aspect-ratio:3/2}
.photos__b img{aspect-ratio:4/3}
.photos figcaption{margin-top:10px;font-size:14px;color:var(--mute)}

/* sensors */
.sens{display:grid;grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr);gap:clamp(32px,5vw,80px);align-items:start}
.frame{position:relative;aspect-ratio:1;background:var(--white);border:1px solid var(--line)}
.frame__img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .5s var(--ease)}
.frame__img.is-on{opacity:1}
.frame__cap{margin-top:10px;font-size:14px;color:var(--mute)}
.tabs{display:flex;flex-wrap:wrap;border-bottom:2px solid var(--line)}
.tab{padding:12px 20px 12px 0;margin-right:20px;background:none;border:0;border-bottom:3px solid transparent;margin-bottom:-2px;font-size:17px;font-weight:500;color:var(--mute);cursor:pointer}
.tab:hover{color:var(--ink)}
.tab.is-on{color:var(--ink);border-bottom-color:var(--accent)}
.spec__intro{margin:22px 0 14px;max-width:56ch;min-height:3.2em}
.spec{width:100%;border-collapse:collapse;font-size:15.5px}
.spec th,.spec td{padding:11px 0;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
.spec th{width:40%;font-weight:500;color:var(--mute);padding-right:16px}
.spec td{font-variant-numeric:tabular-nums}
.spec tr:last-child th,.spec tr:last-child td{border-bottom:1px solid var(--line)}

/* coverage */
.cov{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:clamp(32px,5vw,72px);align-items:start}
.cov__ctl label{display:flex;justify-content:space-between;align-items:baseline;font-weight:500;margin-bottom:6px}
.cov__ctl output{font:600 1.6rem/1 var(--sans);font-variant-numeric:tabular-nums}
.cov__facts{margin-top:26px;border-top:3px solid var(--ink)}
.cov__facts div{display:flex;justify-content:space-between;gap:16px;padding:12px 0;border-bottom:1px solid var(--line);font-size:15.5px}
.cov__facts dt{color:var(--mute)}
.cov__facts dd{font-weight:500;text-align:right;font-variant-numeric:tabular-nums}
.cov__map figcaption{margin-top:10px;font-size:14px;color:var(--mute)}
.map{position:relative;aspect-ratio:2/1;background:var(--white);border:1px solid var(--line)}
.map img,.map svg{position:absolute;inset:0;width:100%;height:100%}
.map__grid line{stroke:#c9cac3;stroke-width:1;vector-effect:non-scaling-stroke}
.map__grid .eq{stroke:#9aa0a0}
.map__grid text{font:500 13px var(--sans);fill:#69737d}
.map__tracks{fill:none;stroke:var(--accent);stroke-width:1.3;stroke-opacity:.55;stroke-linejoin:round;vector-effect:non-scaling-stroke}

/* missions */
.cases{display:flex;flex-direction:column;gap:clamp(36px,5vw,56px)}
.case{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(24px,4vw,56px);align-items:center;padding-top:clamp(28px,4vw,44px);border-top:1px solid var(--line)}
.case:first-child{border-top:0;padding-top:0}
.case>img{width:100%;aspect-ratio:3/2;object-fit:cover;border:1px solid var(--line);background:var(--white)}
.case h3{font-size:clamp(1.3rem,1.9vw,1.7rem);line-height:1.25;max-width:26ch}
.case p{margin-top:12px;color:var(--mute);max-width:54ch}
.meta{display:flex;flex-wrap:wrap;gap:10px 36px;margin-top:20px}
.meta dt{font-size:13.5px;color:var(--mute)}
.meta dd{font-weight:500}

/* gantt */
.gantt__axis{display:grid;grid-template-columns:minmax(200px,26%) 1fr;column-gap:24px;margin-bottom:8px}
.gantt__axis div{display:grid;grid-template-columns:repeat(6,1fr);font-size:13.5px;color:var(--mute);font-variant-numeric:tabular-nums;position:relative}
.gantt__axis b{font-weight:500;text-align:left}
.gantt__axis b:last-child{position:absolute;right:0}
.gantt__axis div{position:relative}
.gantt__rows{border-top:3px solid var(--ink)}
.gantt__rows li{display:grid;grid-template-columns:minmax(200px,26%) 1fr;column-gap:24px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line)}
.g__name b{display:block;font-weight:500;font-size:16px}
.g__name span{display:block;font-size:14px;color:var(--mute);line-height:1.4}
.g__track{position:relative;height:18px;background:repeating-linear-gradient(90deg,transparent 0,transparent calc(16.6667% - 1px),var(--line) calc(16.6667% - 1px),var(--line) 16.6667%)}
.g__track i{position:absolute;top:2px;bottom:2px;left:calc(var(--s) / 6 * 100%);width:calc((var(--e) - var(--s)) / 6 * 100%);background:var(--accent);transform-origin:0 50%}
.gantt__note{margin-top:14px;font-size:14px;color:var(--mute)}

/* ground */
.ground{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,5vw,72px);align-items:start}
.ground__img img{width:100%;aspect-ratio:4/5;object-fit:cover;object-position:60% 50%}
.ground__img figcaption{margin-top:10px;font-size:14px;color:var(--mute)}
.tbl{width:100%;border-collapse:collapse;font-size:15.5px;font-variant-numeric:tabular-nums}
.tbl caption{text-align:left;font-weight:600;font-size:1.1rem;padding-bottom:10px}
.tbl th,.tbl td{padding:11px 16px 11px 0;text-align:left;border-top:1px solid var(--line);vertical-align:top}
.tbl thead th{font-weight:500;color:var(--mute);font-size:14px;border-top:3px solid var(--ink);border-bottom:1px solid var(--line)}
.tbl tbody th{font-weight:500}
.tbl tbody tr:last-child th,.tbl tbody tr:last-child td{border-bottom:1px solid var(--line)}
.comp{margin-top:36px;border-top:3px solid var(--ink)}
.comp div{display:grid;grid-template-columns:11rem 1fr;gap:20px;padding:14px 0;border-bottom:1px solid var(--line)}
.comp dt{font-weight:600}
.comp dd{color:var(--mute);font-size:15.5px;line-height:1.5}

/* about */
.facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));border-top:3px solid var(--ink);margin-bottom:clamp(40px,6vw,64px)}
.facts div{padding:18px 20px 4px 0}
.facts div+div{padding-left:20px;border-left:1px solid var(--line)}
.facts dt{font-size:14.5px;color:var(--mute)}
.facts dd{font:600 clamp(1.9rem,3vw,2.6rem)/1.1 var(--sans);letter-spacing:-.02em;margin-top:4px;font-variant-numeric:tabular-nums}
.tbl--wide{min-width:600px}
.tbl--wide th,.tbl--wide td{padding-right:20px}
.team{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(32px,5vw,72px);border-top:3px solid var(--ink)}
.team>div{padding:20px 0;border-bottom:1px solid var(--line)}
.team h4{font:600 1.15rem/1.3 var(--sans)}
.team__role{color:var(--accent);font-weight:500;font-size:15px;margin:1px 0 8px}
.team p:last-child{color:var(--mute);font-size:15.5px;line-height:1.5;max-width:50ch}
.cert{margin-top:26px;font-size:15px;color:var(--mute);max-width:80ch}

/* pricing */
.tblwrap{overflow-x:auto}
.plans{width:100%;min-width:640px;border-collapse:collapse;font-size:15.5px;background:var(--white)}
.plans th,.plans td{padding:13px 18px;text-align:left;vertical-align:top;border-top:1px solid var(--line)}
.plans thead th{font:600 1.15rem/1.2 var(--sans);border-top:3px solid var(--ink);padding-top:18px;padding-bottom:16px}
.plans tbody th{font-weight:500;color:var(--mute);width:20%}
.plans td:nth-child(3){background:#f3f6f4}
.plans tbody tr:last-child td,.plans tbody tr:last-child th{border-bottom:1px solid var(--line)}
.plans tbody tr:last-child td{font-size:1.1rem}
.calc{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(32px,5vw,80px);align-items:start}
.calc__controls{display:flex;flex-direction:column;gap:30px}
.field{border:0;margin:0;padding:0;min-width:0}
.field label[for],.field legend{display:flex;justify-content:space-between;align-items:baseline;width:100%;padding:0;margin-bottom:8px;font-weight:500}
.field output{font:600 1.6rem/1 var(--sans);font-variant-numeric:tabular-nums}
.opts{display:flex;flex-wrap:wrap;gap:8px}
.opts label{position:relative;cursor:pointer}
.opts input{position:absolute;opacity:0;inset:0;margin:0;cursor:pointer}
.opts span{display:block;padding:10px 16px;background:var(--white);border:1px solid #bfc1ba;border-radius:3px;font-size:15.5px;transition:border-color .2s,background-color .2s,color .2s}
.opts label:hover span{border-color:var(--ink)}
.opts input:checked+span{background:var(--accent);border-color:var(--accent);color:#fff}
.opts input:focus-visible+span{outline:3px solid var(--accent);outline-offset:3px}
.calc__out{background:var(--white);border:1px solid var(--line);padding:clamp(22px,3vw,34px)}
.calc__label{color:var(--mute);font-size:15px}
.calc__fee{display:flex;align-items:baseline;margin-top:4px;font:600 clamp(3.6rem,6.5vw,5.6rem)/1 var(--sans);letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.calc__cur{font-size:.5em;margin-right:.08em;color:var(--mute);letter-spacing:0}
.calc__k{color:var(--accent)}
.calc__facts{margin-top:22px}
.calc__facts div{display:flex;justify-content:space-between;gap:20px;padding:11px 0;border-top:1px solid var(--line);font-size:15.5px}
.calc__facts dt{color:var(--mute)}
.calc__facts dd{font-weight:500;font-variant-numeric:tabular-nums;text-align:right}
.calc__note{font-size:13.5px;color:var(--mute);margin:14px 0 20px}

/* faq */
.faq{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:clamp(32px,5vw,80px);align-items:start}
.acc{border-top:3px solid var(--ink)}
.acc__item{border-bottom:1px solid var(--line)}
.acc__item h3{margin:0;font:inherit}
.acc button{display:flex;justify-content:space-between;align-items:center;gap:24px;width:100%;padding:20px 0;background:none;border:0;text-align:left;cursor:pointer;font:500 1.12rem/1.35 var(--sans)}
.acc button i{position:relative;flex:none;width:16px;height:16px}
.acc button i::before,.acc button i::after{content:"";position:absolute;left:0;top:50%;width:16px;height:2px;margin-top:-1px;background:var(--accent);transition:transform .3s var(--ease)}
.acc button i::after{transform:rotate(90deg)}
.acc button[aria-expanded="true"] i::after{transform:rotate(0)}
.acc__panel{overflow:hidden}
.acc__panel p{padding:0 40px 22px 0;color:var(--mute);max-width:60ch}

/* contact */
.contact{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(32px,6vw,96px);align-items:start}
.addr{margin-top:34px;border-top:3px solid var(--ink)}
.addr div{padding:14px 0;border-bottom:1px solid var(--line)}
.addr dt{font-size:14px;color:var(--mute)}
.addr dd{margin-top:2px}
.addr a{color:var(--accent);text-underline-offset:4px}
.form{background:var(--white);border:1px solid var(--line);padding:clamp(22px,3.4vw,40px)}
.form__row{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}
.fld{margin-bottom:20px}
.fld label{display:block;margin-bottom:6px;font-size:15px;font-weight:500}
.fld label span{font-weight:400;color:var(--mute)}
.fld input,.fld select,.fld textarea{display:block;width:100%;min-height:48px;padding:10px 12px;background:#fff;border:1px solid #9aa0a0;border-radius:3px;font-size:16px}
.fld textarea{resize:vertical;min-height:110px}
.fld input:hover,.fld select:hover,.fld textarea:hover{border-color:var(--ink)}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:3px solid var(--accent);outline-offset:0;border-color:var(--accent)}
.fld input[aria-invalid="true"]{border-color:#b3261e;background:#fdf3f2}
.form__err{min-height:1.5em;margin-bottom:12px;font-size:15px;color:#b3261e;font-weight:500}
.sent:focus{outline:none}
.sent h3{font-size:1.5rem}
.sent p{margin-top:10px;color:var(--mute);max-width:52ch}
.sent b{color:var(--ink)}

/* footer */
.foot{background:var(--grey);border-top:1px solid var(--line);padding:56px 0 28px}
.foot__grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.foot__brand p{margin-top:12px;color:var(--mute);font-size:15px}
.foot__col{display:flex;flex-direction:column;gap:7px;font-size:15px}
.foot__col a{text-decoration:none}
.foot__col a:hover{text-decoration:underline;text-underline-offset:4px}
.foot__col p{color:var(--ink)}
.foot__h{font-weight:600;margin-bottom:4px}
.foot__bottom{display:flex;justify-content:space-between;gap:12px 32px;flex-wrap:wrap;margin-top:44px;padding-top:18px;border-top:1px solid var(--line);font-size:14px;color:var(--mute)}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .nav{position:absolute;top:68px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);border-bottom:1px solid var(--line);padding:6px var(--gut) 16px;display:none}
  .nav.is-open{display:flex}
  .nav a{padding:14px 0;font-size:17px;border-bottom:1px solid var(--line)}
  .nav a::after{display:none}
  .head__menu{display:block}
  .chain{grid-template-columns:repeat(2,minmax(0,1fr));border-top:0}
  .chain li{border-top:3px solid var(--ink);padding:20px 20px 28px 0}
  .chain li+li{border-left:0;padding-left:0}
  .chain li:nth-child(even){padding-left:20px;border-left:1px solid var(--line)}
}
@media (max-width:900px){
  body{font-size:16px}
  .head__in{height:60px}
  .nav{top:60px}
  html{scroll-padding-top:72px}
  .hero{padding-top:60px}
  .hero__grid{grid-template-columns:1fr;row-gap:36px;padding-top:28px}
  .hero__list{margin-top:26px}
  .photos,.sens,.cov,.case,.ground,.calc,.faq,.contact{grid-template-columns:1fr}
  .sens{row-gap:28px}
  .case>img{aspect-ratio:4/3}
  .ground__img img{aspect-ratio:3/2}
  .gantt__axis{grid-template-columns:1fr}
  .gantt__axis>span{display:none}
  .gantt__rows li{grid-template-columns:1fr;row-gap:8px}
  .facts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .facts div{padding:16px 16px 12px 0;border-bottom:1px solid var(--line)}
  .facts div+div{border-left:0;padding-left:0}
  .facts div:nth-child(even){padding-left:16px;border-left:1px solid var(--line)}
  .team{grid-template-columns:1fr}
  .comp div{grid-template-columns:1fr;gap:4px}
  .form__row{grid-template-columns:1fr}
  .foot__grid{grid-template-columns:1fr 1fr}
  .foot__brand{grid-column:1/-1}
}
@media (max-width:560px){
  .chain{grid-template-columns:1fr}
  .chain li:nth-child(even){padding-left:0;border-left:0}
  .hero__cap{flex-direction:column;gap:8px}
  .hero__ctl label{white-space:normal}
}


/* =====================================================================
   Multi-page additions
   ===================================================================== */
/* header dropdowns */
.dd{position:relative;display:flex;align-items:center;height:68px}
.dd>a{height:auto}
.dd__btn{position:relative;width:20px;height:32px;margin-left:2px;background:none;border:0;cursor:pointer;color:var(--mute)}
.dd__btn::before{content:"";position:absolute;left:5px;top:11px;width:7px;height:7px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg);transition:transform .2s}
.dd__btn[aria-expanded="true"]::before{transform:rotate(225deg);top:14px}
.dd__menu{position:absolute;top:100%;left:-18px;min-width:270px;padding:8px 0;background:var(--bg);border:1px solid var(--line);border-top:2px solid var(--accent);display:none;z-index:60}
.dd:hover .dd__menu,.dd:focus-within .dd__menu,.dd.is-open .dd__menu{display:block}
.nav .dd__menu a{display:block;padding:10px 20px;font-size:15px}
.nav .dd__menu a::after{display:none}
.nav .dd__menu a:hover{background:var(--grey)}
.nav .dd__menu a[aria-current="page"]{font-weight:600;color:var(--accent)}

/* page-to-page */
.pbar{position:fixed;top:0;left:0;right:0;height:3px;background:var(--accent);z-index:99;transform:scaleX(0);transform-origin:0 50%;opacity:0;pointer-events:none}
html.ld-skip .pbar{animation:pbar .7s var(--ease) forwards}
@keyframes pbar{0%{opacity:1;transform:scaleX(0)}65%{opacity:1;transform:scaleX(1)}100%{opacity:0;transform:scaleX(1)}}
@view-transition{navigation:auto}
.head{view-transition-name:head}
::view-transition-group(head){animation:none}
::view-transition-old(root){animation:vt-out .16s ease both}
::view-transition-new(root){animation:vt-in .28s ease both}
@keyframes vt-out{to{opacity:0}}
@keyframes vt-in{from{opacity:0}}
@supports not (view-transition-name:none){main{animation:vt-in .35s ease both}}

/* page head */
.phead{padding-top:68px}
.phead+.sec{padding-top:clamp(44px,6vw,72px)}
.phead__grid{padding-top:clamp(36px,6vw,72px);padding-bottom:clamp(36px,5vw,64px)}
.phead--fig .phead__grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);column-gap:clamp(36px,5.5vw,88px);align-items:center}
.phead h1{max-width:24ch}
.phead__copy{min-width:0}
.phead__fig{min-width:0}
.phead__fig img{width:100%;aspect-ratio:4/3;object-fit:cover;border:1px solid var(--line);background:var(--white)}
.crumb{margin-bottom:18px;font-size:14px}
.crumb ol{display:flex;flex-wrap:wrap;gap:2px 0;color:var(--mute)}
.crumb li+li::before{content:"/";margin:0 9px;color:#9aa0a0}
.crumb a{color:var(--mute);text-underline-offset:3px}
.crumb a:hover{color:var(--ink)}
.crumb li:last-child a{color:var(--ink);text-decoration:none;pointer-events:none}
figure figcaption{margin-top:10px;font-size:14px;color:var(--mute);line-height:1.45}
.credit{color:#69737d;font-size:12.5px;line-height:1.45}
figcaption .credit,.hero__cap .credit{display:block;margin-top:4px}
.credit--block{display:block;margin-top:14px}
.more{margin-top:22px}
.more .tlink{height:auto;padding:6px 0}
.sec--tight{padding:30px 0}
.sec--contact{border-top:0}

/* layouts */
.two{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:clamp(32px,5vw,80px);align-items:start}
.two>*,.specgrid>*,.pair>*{min-width:0}
.two--code{grid-template-columns:minmax(0,.6fr) minmax(0,1.4fr)}
.two--text{grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr)}
.prose p{max-width:62ch;margin-top:1em;color:var(--ink)}
.prose p:first-child{margin-top:0}
.specgrid{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:clamp(32px,5vw,80px);align-items:start}
.specgrid .lead{font-size:1rem}
.uses{border-top:3px solid var(--ink);margin-top:20px}
.uses div{padding:14px 0;border-bottom:1px solid var(--line)}
.uses dt{font-weight:600}
.uses dd{margin-top:3px;color:var(--mute);font-size:15.5px;line-height:1.5}
.pair{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:clamp(20px,3vw,40px);align-items:start}
.pair img{width:100%}
.ndvi4{display:grid;grid-template-columns:1fr 1fr;gap:14px 12px}
.ndvi4--wide{grid-template-columns:repeat(4,minmax(0,1fr));margin-top:30px}
.ndvi4 figcaption{margin-top:6px;font-size:13.5px}
.photos--solo{margin-top:40px;max-width:760px}
.photos--solo img{width:100%;aspect-ratio:3/2;object-fit:cover}
.sens__spec .spec__intro{min-height:0}
.sens__spec .more{margin-top:16px}

/* switcher */
.sw--wide .tabs{margin-bottom:18px}
.frame--wide{aspect-ratio:3/2;max-width:1000px}
.sw__credit{display:block;margin-top:3px}

/* steps */
.steps{border-top:3px solid var(--ink)}
.step{display:grid;grid-template-columns:56px minmax(0,1.2fr) minmax(0,.8fr);gap:8px clamp(24px,4vw,56px);padding:34px 0;border-bottom:1px solid var(--line)}
.step__n{font:600 2.4rem/1 var(--sans);color:var(--accent);font-variant-numeric:tabular-nums}
.step__body h3{font-size:1.5rem}
.step__when{margin-top:4px;font-weight:500;color:var(--accent);font-size:15px}
.step__lead{margin-top:14px;font-size:1.1rem;font-weight:500}
.step__body p:last-child{margin-top:10px;color:var(--mute);max-width:60ch}
.step__io{align-self:start;border-top:1px solid var(--line)}
.step__io div{padding:12px 0;border-bottom:1px solid var(--line)}
.step__io dt{font-size:13.5px;color:var(--mute)}
.step__io dd{margin-top:2px;font-size:15.5px;line-height:1.45}

/* tables */
.tbl--sens thead th:first-child{width:104px}
.tbl--sens td,.tbl--sens th{vertical-align:middle}
.tbl--sens a{color:var(--accent);font-weight:600;text-underline-offset:4px}
.thumb{width:104px;padding:10px 12px 10px 0!important}
.thumb__i{width:88px;height:88px;object-fit:cover;border:1px solid var(--line)}
.tbl--two th{width:min(15rem,34%)}
.tbl--years th{width:min(15rem,34%);white-space:nowrap}
.tbl--comp th{width:12rem}
.tbl--comp td{max-width:70ch;line-height:1.5}
.tbl--wide a{color:var(--accent);font-weight:500;text-underline-offset:4px}
.plans--sens td:nth-child(3){background:transparent}
.plans--sens thead td{border-top:3px solid var(--ink)}
.plans--sens tbody th{width:22%}

/* code */
.codewrap+.codewrap{margin-top:26px}
.code__lbl{font-size:13.5px;color:var(--mute);margin-bottom:6px}
.code{margin:0;padding:18px 20px;background:var(--white);border:1px solid var(--line);border-top:3px solid var(--ink);font:400 13.5px/1.6 "IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;color:#26302b;overflow:auto;max-width:100%;white-space:pre;tab-size:2}
.code code{font:inherit}

/* case pages */
.facts--case{grid-template-columns:repeat(auto-fit,minmax(190px,1fr));margin-bottom:0}
.facts--case div,.facts--case div+div{border-left:0;padding:16px 24px 8px 0}
.facts--case dd{font:500 1.05rem/1.4 var(--sans);letter-spacing:0;margin-top:3px}
.facts--big{margin:36px 0 0}
.facts--big dd{font:600 clamp(1.4rem,2.2vw,1.9rem)/1.15 var(--sans);letter-spacing:-.015em}
.quote{margin:44px 0 0;padding:4px 0 4px 24px;border-left:3px solid var(--accent);max-width:60ch}
.quote p{font:500 clamp(1.25rem,2vw,1.6rem)/1.35 var(--sans);letter-spacing:-.01em;max-width:none;color:var(--ink)}
.quote footer{margin-top:12px;font-size:15px;color:var(--mute)}
.case__h{font:600 clamp(1.3rem,1.9vw,1.7rem)/1.25 var(--sans);letter-spacing:-.01em;max-width:26ch}
.case__h a{text-decoration:none}
.case__h a:hover{text-decoration:underline;text-underline-offset:5px}
.case .more{margin-top:14px}

/* cta + pager */
.cta{background:var(--white);border-top:3px solid var(--ink)}
.cta__in{display:flex;align-items:center;justify-content:space-between;gap:24px 48px;flex-wrap:wrap;padding-top:clamp(40px,5vw,60px);padding-bottom:clamp(40px,5vw,60px)}
.cta h2{font-size:clamp(1.5rem,2.2vw,2rem)}
.cta p{margin-top:8px;color:var(--mute);max-width:56ch}
.pager{border-top:1px solid var(--line)}
.pager__in{display:flex;justify-content:space-between;gap:20px;padding-top:26px;padding-bottom:26px}
.pager__a{display:block;text-decoration:none;font-weight:600;font-size:1.1rem;max-width:46%}
.pager__a span{display:block;font-weight:400;font-size:13.5px;color:var(--mute);margin-bottom:2px}
.pager__a--next{text-align:right;margin-left:auto}
.pager__a:hover{color:var(--accent)}

/* people */
.people{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:clamp(32px,5vw,72px);border-top:3px solid var(--ink)}
.person{display:grid;grid-template-columns:132px minmax(0,1fr);gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}
.person img{width:132px;height:auto;aspect-ratio:4/5;object-fit:cover;border:1px solid var(--line)}
.person h3{font-size:1.15rem}
.person .team__role{margin-bottom:8px}
.person p:last-child{color:var(--mute);font-size:15.5px;line-height:1.5}

/* news, article, legal, 404, footer */
.newslist{border-top:3px solid var(--ink)}
.newslist li{display:grid;grid-template-columns:11rem minmax(0,1fr);gap:8px 32px;padding:22px 0;border-bottom:1px solid var(--line)}
.newslist time{color:var(--mute);font-size:15px;padding-top:4px}
.newslist h2{font:600 1.3rem/1.3 var(--sans)}
.newslist a{text-decoration:none}
.newslist a:hover{text-decoration:underline;text-underline-offset:5px}
.newslist p{margin-top:6px;color:var(--mute);max-width:62ch}
.article{max-width:66ch}
.article__date{color:var(--mute);margin-bottom:16px}
.article .prose p{font-size:1.08rem;line-height:1.65}
.legal{max-width:70ch}
.legal section{padding:22px 0;border-top:1px solid var(--line)}
.legal section:first-child{border-top:3px solid var(--ink)}
.legal h2{font-size:1.2rem}
.legal p{margin-top:8px;color:var(--mute)}
.legal__date{margin-top:18px;font-size:14px;color:var(--mute)}
.nf__links{display:flex;flex-wrap:wrap;gap:4px 28px;margin-top:20px}
.foot__small{font-size:13.5px;margin-top:10px}
.foot__legal{display:flex;gap:6px 22px;flex-wrap:wrap}
.foot__legal a{text-underline-offset:4px}
.foot__grid{grid-template-columns:1.3fr 1fr 1fr 1fr 1.1fr}

/* ---------- responsive (additions) ---------- */
@media (max-width:1100px){
  .dd{display:block;height:auto}
  .dd__btn{display:none}
  .dd__menu{position:static;display:block;border:0;padding:0 0 0 18px;min-width:0;background:transparent}
  .nav .dd__menu a{padding:11px 0;font-size:15.5px;color:var(--mute)}
  .nav .dd__menu a:hover{background:transparent}
  .nav .dd>a{display:block}
  .foot__grid{grid-template-columns:1fr 1fr 1fr}
  .foot__brand{grid-column:1/-1}
}
@media (max-width:900px){
  .phead{padding-top:60px}
  .phead--fig .phead__grid,.two,.two--text,.two--code,.specgrid,.pair{grid-template-columns:1fr}
  .phead--fig .phead__grid{row-gap:28px}
  .step{grid-template-columns:44px minmax(0,1fr)}
  .step__io{grid-column:2}
  .step__n{font-size:1.9rem}
  .people{grid-template-columns:1fr}
  .ndvi4--wide{grid-template-columns:repeat(2,minmax(0,1fr))}
  .newslist li{grid-template-columns:1fr}
}
@media (max-width:640px){
  .tbl--sens th:nth-child(n+5),.tbl--sens td:nth-child(n+5){display:none}
}
@media (max-width:560px){
  .person{grid-template-columns:96px minmax(0,1fr);gap:16px}
  .person img{width:96px}
  .foot__grid{grid-template-columns:1fr 1fr}
  .crumb{font-size:13.5px}
  .tbl--years th{white-space:normal}
}

/* reduced motion */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition-duration:.01ms!important}
  ::view-transition-old(root),::view-transition-new(root){animation:none!important}
}