/* ==========================================================================
   INUX3D — Industrial / Technical Design System
   Static site stylesheet. No frameworks. Dark, engineering-forward.
   ========================================================================== */

/* ---- Design tokens ------------------------------------------------------- */
:root {
  /* Surfaces */
  --bg:        #0a0b0d;   /* near-black graphite            */
  --bg-1:      #0f1114;   /* raised surface                 */
  --bg-2:      #15181d;   /* cards                          */
  --bg-3:      #1c2027;   /* hover / borders base           */
  --line:      #262b33;   /* hairline rules                 */
  --line-2:    #333a45;   /* stronger rules                 */

  /* Ink */
  --ink:       #f2f4f7;   /* primary text                   */
  --ink-2:     #aeb6c2;   /* secondary text                 */
  --ink-3:     #6b7280;   /* muted / captions               */

  /* Brand */
  --accent:    #f26722;   /* INUX3D brand orange            */
  --accent-2:  #ff8038;
  --accent-ink:#0a0b0d;
  --cyan:      #35d0d6;   /* technical cyan (secondary)     */

  /* Light section (contrast blocks) */
  --paper:     #f4f5f7;
  --paper-ink: #14171c;
  --paper-ink-2:#4a525e;
  --paper-line:#dfe3e8;

  /* Type */
  --font-sans: "Space Grotesk", "Inter", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Metrics */
  --wrap: 1200px;
  --gap:  clamp(16px, 3vw, 32px);
  --radius: 4px;
  --radius-lg: 8px;
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* ---- Reset --------------------------------------------------------------- */
*,*::before,*::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,svg,video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; background: none; border: 0; }
ul { list-style: none; padding: 0; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
::selection { background: var(--accent); color: var(--accent-ink); }

/* ---- Layout helpers ------------------------------------------------------ */
.wrap { width: min(100% - 2*clamp(16px,5vw,48px), var(--wrap)); margin-inline: auto; }
.section { padding-block: clamp(56px, 9vw, 128px); position: relative; }
.section--tight { padding-block: clamp(40px, 6vw, 72px); }
.section--paper { background: var(--paper); color: var(--paper-ink); }
.section--paper .eyebrow { color: var(--accent); }
.section--paper h1,.section--paper h2,.section--paper h3 { color: var(--paper-ink); }
.section--paper p { color: var(--paper-ink-2); }

.grid { display: grid; gap: var(--gap); }
@media (min-width:640px){ .cols-2{grid-template-columns:repeat(2,1fr);} }
@media (min-width:900px){ .cols-3{grid-template-columns:repeat(3,1fr);} .cols-2\@md{grid-template-columns:repeat(2,1fr);} }
@media (min-width:1080px){ .cols-4{grid-template-columns:repeat(4,1fr);} }

/* ---- Typography ---------------------------------------------------------- */
h1,h2,h3,h4 { font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; }
.display { font-size: clamp(2.6rem, 6.2vw, 5rem); font-weight: 600; letter-spacing: -0.035em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
p  { color: var(--ink-2); }
.lead { font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--ink-2); max-width: 62ch; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: .74rem; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase;
  color: var(--accent);
  display: inline-flex; align-items: center; gap: .6em;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--accent); }
.mono { font-family: var(--font-mono); }
.muted { color: var(--ink-3); }

/* Inline icon default sizing (overridden by component rules below) */
.ico { width: 1.15em; height: 1.15em; flex: 0 0 auto; display: inline-block; vertical-align: middle; }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: .55em;
  padding: .85em 1.5em; border-radius: var(--radius);
  font-weight: 500; font-size: .95rem; letter-spacing: .01em;
  transition: transform .25s var(--ease), background .25s, color .25s, border-color .25s;
  border: 1px solid transparent; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { border-color: var(--line-2); color: var(--ink); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn--light { background: var(--paper-ink); color: var(--paper); }
.btn .arw { transition: transform .25s var(--ease); }
.btn:hover .arw { transform: translateX(3px); }

/* ---- Header / nav -------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; gap: 1.5rem; height: 68px; }
.brand { display: inline-flex; align-items: center; }
.brand-logo { height: 26px; width: auto; display: block; }
.brand-logo--full { height: 46px; }
@media (min-width: 960px){ .brand-logo { height: 28px; } }
.nav-links { display: none; align-items: center; gap: .35rem; margin-inline-start: auto; }
.nav-links a {
  position: relative; padding: .5rem .8rem; font-size: .92rem; color: var(--ink-2);
  border-radius: var(--radius); transition: color .2s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-links a[aria-current="page"]::after {
  content:""; position:absolute; left:.8rem; right:.8rem; bottom:.25rem; height:1px; background: var(--accent);
}
.has-drop { position: relative; }
.drop {
  position: absolute; top: calc(100% + 10px); left: 0; min-width: 240px;
  background: var(--bg-1); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: .4rem; opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: .2s var(--ease); box-shadow: 0 24px 48px -20px rgba(0,0,0,.7);
}
.has-drop:hover .drop, .has-drop:focus-within .drop { opacity: 1; visibility: visible; transform: none; }
.drop a { display: flex; flex-direction: column; padding: .6rem .7rem; border-radius: var(--radius); }
.drop a small { color: var(--ink-3); font-size: .78rem; }
.drop a:hover { background: var(--bg-2); }
.nav-actions { display: flex; align-items: center; gap: .75rem; margin-inline-start: auto; }
.nav-links + .nav-actions { margin-inline-start: 0; }
.lang {
  display: inline-flex; font-family: var(--font-mono); font-size: .78rem; border: 1px solid var(--line-2);
  border-radius: var(--radius); overflow: hidden;
}
.lang a { padding: .3rem .55rem; color: var(--ink-3); }
.lang a[aria-current="true"] { background: var(--bg-3); color: var(--ink); }
.nav-cta { display: none; }
.burger { margin-inline-start: auto; display: inline-flex; flex-direction: column; gap: 5px; padding: .5rem; }
.burger span { width: 22px; height: 2px; background: var(--ink); transition: .25s; }
.nav-open .burger span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-open .burger span:nth-child(2){ opacity: 0; }
.nav-open .burger span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

@media (min-width: 960px) {
  .nav-links { display: flex; }
  .nav-actions { margin-inline-start: 1rem; }
  .nav-cta { display: inline-flex; }
  .burger { display: none; }
}

/* Mobile drawer */
.mobile-nav {
  position: fixed; inset: 68px 0 0; z-index: 55; background: var(--bg);
  transform: translateX(100%); transition: transform .3s var(--ease);
  padding: 1.5rem clamp(16px,5vw,48px); overflow-y: auto; display: flex; flex-direction: column; gap: .25rem;
}
.nav-open .mobile-nav { transform: none; }
.mobile-nav a { padding: .9rem .25rem; font-size: 1.15rem; border-bottom: 1px solid var(--line); color: var(--ink); }
.mobile-nav .sub { font-size: .95rem; color: var(--ink-2); padding-left: 1rem; }
@media (min-width: 960px){ .mobile-nav{ display:none; } }

/* ---- Technical grid backdrop -------------------------------------------- */
.grid-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 0; }
.grid-bg::before {
  content:""; position:absolute; inset:-1px;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 0%, transparent 75%);
  opacity: .5;
}
.section > .wrap { position: relative; z-index: 1; }

/* ---- Hero ---------------------------------------------------------------- */
.hero { padding-top: clamp(48px, 8vw, 96px); padding-bottom: clamp(48px, 8vw, 96px); overflow: hidden; }
.hero--full { padding-top: clamp(56px, 11vw, 150px); padding-bottom: clamp(48px, 8vw, 110px); }
.hero-lead-col { max-width: 900px; }
.hero--full .display { margin: .5rem 0 1.3rem; }
.hero--full .hero-meta { max-width: 760px; }
.hero-grid { display: grid; gap: clamp(28px,4vw,56px); align-items: center; }
@media (min-width: 980px){ .hero-grid{ grid-template-columns: 1.05fr .95fr; } }
.hero .display { margin: .4rem 0 1.1rem; }
.hero .display span { color: var(--accent); }
.hero-cta { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 1.8rem; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 1.6rem; margin-top: 2.4rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.hero-meta div b { display: block; font-size: 1.7rem; font-weight: 600; letter-spacing: -.02em; }
.hero-meta div span { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }

/* Hero visual — layered technical panel */
.hero-visual {
  position: relative; aspect-ratio: 4/3.4; border: 1px solid var(--line);
  border-radius: var(--radius-lg); background:
    radial-gradient(120% 80% at 70% 10%, rgba(255,90,31,.14), transparent 55%),
    var(--bg-1);
  overflow: hidden;
}
.hero-visual .rings { position:absolute; inset:0; }
.hero-visual .tag {
  position:absolute; font-family: var(--font-mono); font-size: .68rem; letter-spacing:.1em;
  color: var(--ink-3); background: var(--bg-2); border:1px solid var(--line); border-radius:100px; padding:.25rem .7rem;
}

/* ---- Cards --------------------------------------------------------------- */
.card {
  position: relative; background: var(--bg-2); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: clamp(1.4rem,2.4vw,2rem);
  transition: border-color .3s, transform .3s var(--ease), background .3s;
  display: flex; flex-direction: column; gap: .8rem; height: 100%;
}
.card:hover { border-color: var(--line-2); transform: translateY(-4px); }
.card--link:hover { border-color: var(--accent); }
.card .idx { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-3); letter-spacing: .1em; }
.card h3 { display: flex; align-items: center; gap: .6rem; }
.card p { color: var(--ink-2); font-size: .96rem; }
.card .more { margin-top: auto; font-family: var(--font-mono); font-size: .8rem; letter-spacing: .06em; color: var(--accent); display: inline-flex; gap: .4em; }
.card-ico { width: 44px; height: 44px; border-radius: var(--radius); display: grid; place-items: center;
  background: color-mix(in srgb, var(--accent) 14%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent); }
.card-ico svg { width: 22px; height: 22px; stroke: var(--accent); }

/* Feature list */
.ticks { display: grid; gap: .7rem; }
.ticks li { display: flex; gap: .7rem; align-items: flex-start; color: var(--ink-2); font-size: .96rem; }
.ticks li::before { content: "→"; color: var(--accent); font-family: var(--font-mono); flex: 0 0 auto; }

/* Spec table */
.spec { width: 100%; border-collapse: collapse; font-size: .92rem; }
.spec th, .spec td { text-align: left; padding: .85rem 1rem; border-bottom: 1px solid var(--line); }
.spec th { font-family: var(--font-mono); font-weight: 500; color: var(--ink-3); font-size: .8rem; letter-spacing: .06em; text-transform: uppercase; width: 42%; vertical-align: top; }
.spec td { color: var(--ink); }
.spec tr:last-child th, .spec tr:last-child td { border-bottom: 0; }

/* Section header block */
.sec-head { max-width: 64ch; margin-bottom: clamp(28px,4vw,52px); }
.sec-head h2 { margin: .7rem 0 .8rem; }
.sec-head.center { margin-inline: auto; text-align: center; }
.sec-head.center .eyebrow::before { display: none; }

/* ---- Process steps ------------------------------------------------------- */
.steps { counter-reset: s; display: grid; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
@media (min-width:800px){ .steps{ grid-template-columns: repeat(4,1fr); } }
.step { counter-increment: s; background: var(--bg-1); padding: 1.6rem; display: flex; flex-direction: column; gap: .6rem; }
.step::before { content: counter(s,decimal-leading-zero); font-family: var(--font-mono); color: var(--accent); font-size: .8rem; letter-spacing: .1em; }
.step h4 { font-size: 1.05rem; }
.step p { font-size: .9rem; }

/* ---- Stats strip --------------------------------------------------------- */
.stats { display: grid; gap: 1px; background: var(--line); border-block: 1px solid var(--line); }
@media (min-width:640px){ .stats{ grid-template-columns: repeat(4,1fr); } }
.stat { background: var(--bg); padding: clamp(1.6rem,3vw,2.4rem) 1.4rem; text-align: center; }
.stat b { display: block; font-size: clamp(2rem,4vw,3rem); font-weight: 600; letter-spacing: -.03em; }
.stat b span { color: var(--accent); }
.stat small { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); }

/* ---- Portfolio grid ------------------------------------------------------ */
.folio { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fill, minmax(min(100%,300px),1fr)); }
.folio-item { position: relative; aspect-ratio: 4/3; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line); background: var(--bg-2); }
.folio-item .ph { position:absolute; inset:0; display:grid; place-items:center; }
.folio-item figcaption { position: absolute; inset: auto 0 0 0; padding: 1rem 1.1rem; background: linear-gradient(transparent, rgba(0,0,0,.85)); }
.folio-item figcaption b { display: block; font-weight: 600; }
.folio-item figcaption span { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em; color: var(--accent); text-transform: uppercase; }

/* ---- CTA band ------------------------------------------------------------ */
.cta-band { position: relative; overflow: hidden; border-radius: var(--radius-lg);
  background: linear-gradient(120deg, #12151a, #191d24); border: 1px solid var(--line);
  padding: clamp(2.2rem,5vw,4rem); text-align: center; }
.cta-band .glow { position: absolute; width: 480px; height: 480px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,31,.22), transparent 65%); top: -180px; left: 50%; transform: translateX(-50%); pointer-events: none; }

/* ---- Contact / forms ----------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: .45rem; margin-bottom: 1.1rem; }
.field label { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.field input, .field textarea, .field select {
  background: var(--bg-1); border: 1px solid var(--line-2); border-radius: var(--radius);
  padding: .85rem 1rem; color: var(--ink); font: inherit; font-size: .95rem; transition: border-color .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--accent); }
.field textarea { resize: vertical; min-height: 140px; }
.info-list { display: grid; gap: 1.4rem; }
.info-list .row { display: flex; gap: 1rem; align-items: flex-start; }
.info-list .row svg { width: 22px; height: 22px; stroke: var(--accent); flex: 0 0 auto; margin-top: 2px; }
.info-list .row b { display: block; font-family: var(--font-mono); font-size: .74rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-bottom: .2rem; }

/* ---- Legal / prose ------------------------------------------------------- */
.prose { max-width: 76ch; }
.prose h2 { margin: 2.4rem 0 .8rem; font-size: 1.5rem; }
.prose h3 { margin: 1.8rem 0 .6rem; font-size: 1.15rem; }
.prose p, .prose li { color: var(--ink-2); }
.prose ul { display: grid; gap: .5rem; margin: .6rem 0 1.2rem; }
.prose ul li { position: relative; padding-left: 1.4rem; }
.prose ul li::before { content:"—"; position:absolute; left:0; color: var(--accent); }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; }
.prose .updated { font-family: var(--font-mono); font-size: .8rem; color: var(--ink-3); }

/* ---- Breadcrumb / page hero --------------------------------------------- */
.page-hero { padding-block: clamp(48px,7vw,88px); border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.crumbs { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-3); letter-spacing: .06em; margin-bottom: 1.2rem; }
.crumbs a:hover { color: var(--accent); }
.crumbs span { color: var(--line-2); margin: 0 .5rem; }

/* ---- Footer -------------------------------------------------------------- */
.site-footer { border-top: 1px solid var(--line); background: var(--bg-1); padding-block: clamp(48px,6vw,72px) 2rem; }
.foot-grid { display: grid; gap: 2.5rem; }
@media (min-width:760px){ .foot-grid{ grid-template-columns: 1.6fr 1fr 1fr 1fr; } }
.foot-grid h4 { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); margin-bottom: 1.1rem; font-weight: 500; }
.foot-grid a { color: var(--ink-2); font-size: .93rem; display: block; padding: .28rem 0; }
.foot-brand .brand { display: inline-flex; }
.foot-grid a:hover { color: var(--accent); }
.foot-brand p { font-size: .93rem; margin: 1rem 0 1.3rem; max-width: 34ch; }
.socials { display: flex; gap: .6rem; }
.socials a { width: 38px; height: 38px; border: 1px solid var(--line-2); border-radius: var(--radius); display: grid; place-items: center; color: var(--ink-2); }
.socials a:hover { border-color: var(--accent); color: var(--accent); }
.socials svg { width: 18px; height: 18px; }
.foot-bottom { margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line);
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center;
  font-size: .82rem; color: var(--ink-3); font-family: var(--font-mono); }
.foot-bottom a:hover { color: var(--accent); }

/* ---- Reveal animation ---------------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
}

/* ---- Utilities ----------------------------------------------------------- */
.split { display: grid; gap: clamp(28px,5vw,64px); align-items: center; }
@media (min-width:900px){ .split{ grid-template-columns: 1fr 1fr; } }
.divider { height: 1px; background: var(--line); border: 0; }
.pill { display: inline-flex; align-items: center; gap: .4em; font-family: var(--font-mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-2); border: 1px solid var(--line-2); border-radius: 100px; padding: .3rem .8rem; }
.tag-row { display: flex; flex-wrap: wrap; gap: .5rem; }
.center-btn { display: flex; justify-content: center; margin-top: 2.4rem; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 100; background: var(--accent); color: var(--accent-ink); padding: .6rem 1rem; border-radius: var(--radius); }