/* ============================================================
   Unboundly — compact engineering introduction
   Self-contained. Reuses the landing page's design tokens and
   self-hosted fonts (fonts.css) so it reads as the same brand.
   Optional theme controls; local fonts and Anime.js motion.
   ============================================================ */

:root{
  --paper:#F5EFE7;
  --paper-2:#EFE7DA;
  --ink:#1B1A16;
  --ink-soft:#4F4B42;
  --muted:#8B8476;
  --line:rgba(27,26,22,.16);
  --line-strong:rgba(27,26,22,.34);
  --accent:#5B5BD6;
  --accent-ink:#4949C2;

  --card:#FBF7F1;
  --bar:rgba(27,26,22,.24);
  --bar-soft:rgba(27,26,22,.13);
  --chip:rgba(27,26,22,.08);
  --structure:#57533F;
  --tape-a:#5B5BD6;
  --tape-b:#F5EFE7;
  --lime:#C8DB63;
  --ring:rgba(27,26,22,.22);

  /* footer stays a dark band in both themes */
  --foot-bg:#1B1A16;
  --foot-fg:rgba(245,239,231,.70);
  --foot-brand:#F5EFE7;
  --foot-border:rgba(245,239,231,.14);

  --serif:'Newsreader', Georgia, 'Times New Roman', serif;
  --display:'Fraunces', Georgia, serif;
  --sans:'Jost', 'Helvetica Neue', Arial, sans-serif;
  --pad:clamp(1.5rem, 5vw, 5rem);
  --maxw:1180px;
}

/* ---------- dark: explicit choice ---------- */
html[data-theme="dark"]{ color-scheme:dark; }

html[data-theme="dark"]{
  --paper:#12110E;
  --paper-2:#191712;
  --ink:#EDE6DA;
  --ink-soft:#C7BFAF;
  --muted:#9A9182;
  --line:rgba(237,230,218,.14);
  --line-strong:rgba(237,230,218,.30);
  --accent:#7C7CEB;
  --accent-ink:#8F8FF0;
  --card:#1C1A15;
  --bar:rgba(237,230,218,.26);
  --bar-soft:rgba(237,230,218,.14);
  --chip:rgba(237,230,218,.10);
  --structure:#8C8471;
  --tape-a:#7C7CEB;
  --tape-b:#1C1A15;
  --lime:#D5E97A;
  --ring:rgba(237,230,218,.20);

  --foot-bg:#1C1A15;
  --foot-fg:rgba(245,239,231,.72);
  --foot-brand:#F5EFE7;
  --foot-border:rgba(245,239,231,.14);
}

/* ---------- dark: following the OS when nothing is stored ---------- */
@media (prefers-color-scheme: dark){
  /* no-JS fallback: with the script blocked, no data-theme is set at all */
  html[data-theme="auto"],
  html:not([data-theme]){
    color-scheme:dark;
    --paper:#12110E;
    --paper-2:#191712;
    --ink:#EDE6DA;
    --ink-soft:#C7BFAF;
    --muted:#9A9182;
    --line:rgba(237,230,218,.14);
    --line-strong:rgba(237,230,218,.30);
    --accent:#7C7CEB;
    --accent-ink:#8F8FF0;
    --card:#1C1A15;
    --bar:rgba(237,230,218,.26);
    --bar-soft:rgba(237,230,218,.14);
    --chip:rgba(237,230,218,.10);
    --structure:#8C8471;
    --tape-a:#7C7CEB;
    --tape-b:#1C1A15;
    --lime:#D5E97A;
    --ring:rgba(237,230,218,.20);

    --foot-bg:#1C1A15;
    --foot-fg:rgba(245,239,231,.72);
    --foot-brand:#F5EFE7;
    --foot-border:rgba(245,239,231,.14);
  }
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:2rem;-webkit-text-size-adjust:100%}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:18px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:.25em}
a,button{touch-action:manipulation}
::selection{background:var(--accent);color:var(--paper)}
:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
.skip-link{position:absolute;top:0;left:1rem;z-index:10;background:var(--paper);padding:.7rem;transform:translateY(-120%)}
.skip-link:focus{transform:none}
.section-wrap,.page-header{width:calc(100% - var(--pad)*2);max-width:var(--maxw);margin-inline:auto}
.page-header{display:flex;align-items:center;gap:2rem;min-height:calc(100px + env(safe-area-inset-top));padding-top:env(safe-area-inset-top);border-bottom:1px solid var(--line)}
.hold-brand{display:flex;gap:.7rem;align-items:center;margin-right:auto}
.hold-brand svg{width:26px;height:26px;color:var(--accent)}
.wm,.foot-wordmark{font-family:var(--sans);font-weight:500;font-size:.88rem;letter-spacing:.2em;text-transform:uppercase}
.page-nav{display:flex;gap:1.8rem;font:400 .84rem var(--sans)}
.page-nav a{text-decoration:none;padding:.6rem 0}
.page-nav a:hover{color:var(--accent-ink)}
.theme-toggle{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;width:40px;height:40px;border:1px solid var(--line);border-radius:50%;background:transparent;color:var(--ink);cursor:pointer}
.theme-toggle svg{width:17px;height:17px}
.theme-toggle[hidden],.theme-toggle .icon-moon{display:none}
html[data-theme="dark"] .theme-toggle .icon-sun{display:none}
html[data-theme="dark"] .theme-toggle .icon-moon{display:block}
@media(prefers-color-scheme:dark){html[data-theme="auto"] .theme-toggle .icon-sun,html:not([data-theme]) .theme-toggle .icon-sun{display:none}html[data-theme="auto"] .theme-toggle .icon-moon,html:not([data-theme]) .theme-toggle .icon-moon{display:block}}
.hero{position:relative;overflow:hidden;padding:clamp(3.5rem,7vw,6.5rem) 0 4.5rem}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.9fr);gap:2.5rem;align-items:center}
.hold-copy,.system-art{min-width:0}
.index-tag{font:400 .69rem/1.6 var(--sans);letter-spacing:.17em;text-transform:uppercase;color:var(--ink-soft)}
.index-tag b{font-weight:500;color:var(--accent-ink)}
.hold-title{font-family:var(--display);font-weight:300;font-optical-sizing:none;font-variation-settings:'opsz' 16;font-size:clamp(2.7rem,4.1vw,4.05rem);line-height:1.08;letter-spacing:-.035em;margin:1.1rem 0 1.5rem}
.hold-title span{color:var(--accent-ink)}
.hold-lead{max-width:58ch;font-size:1.13rem;line-height:1.7;color:var(--ink-soft)}
.hero-expertise{max-width:60ch;margin-top:1.1rem;font-size:1.02rem;line-height:1.65;color:var(--ink-soft)}
.brand-context{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(2rem,5vw,5rem);align-items:center;padding-block:3rem 4rem}
.brand-context>p{font-size:1.2rem;color:var(--ink-soft);max-width:55ch}
.applications{padding-block:4rem;border-top:1px solid var(--line)}
.application-list{margin-top:2.5rem}
.application-row{display:grid;grid-template-columns:1fr 1.5fr;gap:clamp(1.5rem,5vw,4rem);padding-block:2rem;border-top:1px solid var(--line)}
.application-row h3{margin:0;max-width:26ch}
.application-row p,.engineering-story p,.engagement p{color:var(--ink-soft);font-size:1.08rem}
.engineering-story{margin-top:3rem;padding-top:1.5rem;border-top:2px solid var(--accent);max-width:85ch}
.engineering-story p+p{margin-top:1rem}
.engagement{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--line)}
.contact-inner>div{max-width:720px}
.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1.2rem 1.8rem;margin-top:2rem}
.button{display:inline-flex;align-items:center;justify-content:center;gap:1.5rem;padding:.9rem 1.3rem;min-height:48px;border-radius:5px;text-decoration:none;font:500 .9rem/1.5 var(--sans);transition:background .2s,transform .2s}
.button:hover{transform:translateY(-2px)}
.primary{background:#4949C2;color:#fff}
.primary:hover{background:#3c3ca4}
.text-link{font:500 .9rem/1.6 var(--sans);text-decoration:none;display:inline-flex;align-items:center;gap:.8rem;min-height:44px}
.text-link:hover{text-decoration:underline}
.btn-arrow{display:block;flex-shrink:0}
.partner-note{margin-top:1.7rem;font:400 .8rem/1.8 var(--sans);color:var(--ink-soft)}
.partner-note b{font-weight:500}
.brand-signature{margin-top:1.4rem;font:400 .85rem/1.6 var(--sans);letter-spacing:.035em;color:var(--accent-ink)}
.philosophy{padding-block:4rem;border-top:1px solid var(--line)}
.philosophy-intro{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(2rem,5vw,5rem);align-items:start}
.philosophy-story{padding-top:.2rem;color:var(--ink-soft);font-size:1.08rem}
.philosophy-story p+p{margin-top:1rem}
.philosophy-story .philosophy-kicker{font:400 1.3rem/1.4 var(--display);color:var(--ink)}
.value-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem;margin-top:2.5rem}
.value-grid article{border-top:2px solid var(--accent);padding-top:.5rem}
.value-grid h3{font-size:1.3rem}
.value-grid p{font-size:1.05rem;color:var(--ink-soft)}
@media(max-width:760px){.philosophy{padding-block:3rem}.philosophy-intro,.value-grid{grid-template-columns:1fr;gap:1.5rem}.value-grid{margin-top:2rem}.page-header{column-gap:1rem}.page-nav{gap:.9rem}}
@media(max-width:460px){.page-nav{justify-content:space-between;gap:.7rem}.brand-signature{font-size:.8rem}}
.system-art svg{display:block;width:100%;height:auto}
.art-caption{margin-top:.6rem;text-align:center;font:400 .64rem var(--sans);letter-spacing:.13em;text-transform:uppercase;color:var(--ink-soft)}
.connection{fill:none;stroke:var(--accent);stroke-width:1.5}
.diagram-card>rect{fill:var(--card);stroke:var(--line-strong)}
.diagram-card .diagram-accent{fill:var(--accent);stroke:none}
.diagram-index{fill:var(--ink-soft);font:10px var(--sans);letter-spacing:1px}
.diagram-label{fill:var(--ink);font:19px var(--display)}
.diagram-mark{stroke:var(--paper);stroke-width:1.5;fill:none}
.diagram-code{stroke:var(--accent);stroke-width:1.5;fill:none}
.diagram-bar{stroke:var(--bar);stroke-width:3;stroke-linecap:round}
.signal{fill:var(--accent)}
.motion-toggle{display:block;margin:.7rem auto 0;padding:.35rem .65rem;border:1px solid var(--line);border-radius:100px;background:transparent;color:var(--ink-soft);font:400 .65rem/1.5 var(--sans);cursor:pointer}
.motion-toggle[hidden]{display:none}
.motion-toggle:hover{color:var(--ink);border-color:var(--ink-soft)}
.hold-glow{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.glow{position:absolute;border-radius:50%;filter:blur(80px);opacity:.4;background:var(--accent);background:color-mix(in srgb,var(--accent) 20%,transparent)}
.glow-a{width:400px;height:400px;top:-230px;left:-130px}
.glow-b{width:380px;height:380px;bottom:-200px;right:-120px}
.services,.partners{padding-block:4rem;border-top:1px solid var(--line)}
.section-heading{max-width:700px}
h2{font:300 clamp(2rem,3vw,3rem)/1.16 var(--display);letter-spacing:-.025em;margin:.9rem 0 1rem}
h2 em{font-weight:300;color:var(--accent-ink)}
.section-heading>p:last-child{color:var(--ink-soft);max-width:57ch}
.service-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:2.5rem;border:1px solid var(--line);border-radius:8px;background:var(--card)}
.service-card{padding:2rem;display:flex;flex-direction:column;align-items:flex-start}
.service-card+.service-card{border-left:1px solid var(--line)}
.service-number{font:400 .75rem var(--sans);color:var(--accent-ink)}
h3{font:400 1.65rem/1.25 var(--display);margin:1rem 0 .85rem}
.service-card p{font-size:1.06rem;line-height:1.6;color:var(--ink-soft);margin-bottom:1.7rem}
.service-detail{margin-top:auto;font:400 .66rem/1.6 var(--sans);letter-spacing:.025em;color:var(--ink-soft)}
.partner-heading{max-width:none}
.partner-card{display:grid;grid-template-columns:1fr 2fr;gap:3rem;padding:2.5rem;border:1px solid var(--line);border-radius:8px;background:var(--card);margin-top:2rem}
.partner-name{align-self:center;display:flex;align-items:center;gap:1.5rem;font:400 2.8rem var(--sans);text-decoration:none}
.partner-name span{font-size:1.5rem;color:var(--accent-ink)}
.partner-copy{border-left:1px solid var(--line);padding-left:2.5rem}
.partner-copy h3{font-size:1.22rem;margin:0 0 .8rem}
.partner-copy p{color:var(--ink-soft);font-size:1.06rem;margin-bottom:1rem}
.partner-cta{margin-top:1.2rem}
.contact{background:var(--foot-bg);color:var(--foot-brand);padding:4rem 0}
.contact-inner{display:flex;justify-content:space-between;gap:2rem;align-items:center}
.contact h2{font-size:clamp(2rem,3vw,2.8rem)}
.contact h2 em{color:#b6b4ff}
.contact .index-tag,.contact p{color:var(--foot-fg)}
.contact .index-tag b{color:#b6b4ff}
.contact-button{background:#F5EFE7;color:#1B1A16;flex-shrink:0}
.hold-foot{background:var(--foot-bg);color:var(--foot-fg);border-top:1px solid var(--foot-border);padding:1.7rem 0 calc(1.7rem + env(safe-area-inset-bottom))}
.hold-foot-inner{display:flex;align-items:center;justify-content:space-between;gap:1.2rem;flex-wrap:wrap}
.foot-wordmark{color:var(--foot-brand)}
.foot-meta{font:400 .65rem/1.6 var(--sans);letter-spacing:.08em}
.foot-contact{font:400 .8rem var(--sans);color:var(--foot-brand);text-decoration:none}
.foot-contact:hover{text-decoration:underline}
.rise{animation:rise .8s ease both}.d1{animation-delay:.1s}.d2{animation-delay:.2s}.d3{animation-delay:.3s}.d4{animation-delay:.4s}
@keyframes rise{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
/* Anime.js applies reveals on entry. Leave content visible if scripts fail. */
@media(max-width:1000px){.hero-grid{grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:1rem}.hold-title{font-size:clamp(2.5rem,4.6vw,3.4rem)}.service-card{padding:1.5rem}.service-detail{font-size:.63rem}.partner-card{gap:1.8rem;padding:2rem}.partner-copy{padding-left:1.8rem}}
@media(max-width:760px){.page-header{min-height:86px;gap:1.2rem}.page-nav{gap:1rem;font-size:.8rem}.hero{padding-top:2.7rem;padding-bottom:2.7rem}.hero-grid{grid-template-columns:1fr}.hold-title{font-size:clamp(2.5rem,7.5vw,3.7rem)}.hold-lead{max-width:60ch}.system-art{width:min(380px,100%);margin:1.7rem auto 0}.services,.partners{padding-block:3rem}.service-grid{grid-template-columns:1fr}.service-card{padding:1.7rem}.service-card+.service-card{border-left:0;border-top:1px solid var(--line)}.service-card p{margin-bottom:1rem}.service-detail{font-size:.7rem}.partner-card{grid-template-columns:1fr;gap:1.5rem;padding:1.7rem}.partner-copy{border-left:0;border-top:1px solid var(--line);padding:1.5rem 0 0}.partner-name{font-size:2.2rem}.contact-inner{flex-direction:column;align-items:flex-start}.contact{padding:3rem 0}}
@media(max-width:460px){.theme-toggle{width:36px;height:36px}.index-tag{font-size:.61rem;letter-spacing:.12em}.hold-title{font-size:2.55rem}.hero-actions{align-items:flex-start;flex-direction:column;gap:.7rem}.partner-note{font-size:.75rem}.system-art{max-width:320px}.hold-foot-inner{align-items:flex-start;flex-direction:column}}
@media(max-width:760px){.brand-context,.application-row{grid-template-columns:1fr;gap:1.2rem}.brand-context,.applications{padding-block:3rem}.engineering-story{margin-top:2rem}.application-row h3{max-width:none}}
@media(max-width:600px){.page-header{flex-wrap:wrap;gap:0;padding:calc(1.2rem + env(safe-area-inset-top)) 0 1.2rem}.hold-brand{flex:1}.page-nav{order:3;width:100%;justify-content:space-between;margin-top:.7rem;gap:.7rem}.page-nav a{min-height:44px;display:inline-flex;align-items:center}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation:none!important;transition:none!important}.rise{opacity:1;transform:none}html.js .reveal{opacity:1;transform:none}}