/* inferne.com */

:root {
  --paper: #f6f5f1;
  --paper-2: #efeee8;
  --card: #fbfaf7;
  --ink: #0e0e10;
  --ink-2: #2b2b2f;
  --muted: #5d5d64;
  --faint: #8c8c93;
  --line: #e2e0d8;
  --line-2: #d3d1c8;
  --on-ink: #f6f5f1;
  /* emphasis slabs (AI card, contact card, blog CTA): black on paper, a raised dark surface in dark mode */
  --slab: #0e0e10;
  --slab-2: #1b1b1f;
  --on-slab: #f6f5f1;
  --slab-line: #0e0e10;

  --blue: #1a9fe8;
  --amber: #f4a30f;
  --green: #1fbd68;
  --blend: multiply;

  --font: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --serif: "Instrument Serif", ui-serif, Georgia, "Times New Roman", serif;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --wrap: 1240px;
  --gutter: clamp(20px, 4.2vw, 56px);
  --radius: 20px;
  --nav-h: 72px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0c0c0d;
    --paper-2: #121214;
    --card: #151517;
    --ink: #f1f0eb;
    --ink-2: #d8d7d2;
    --muted: #a3a3aa;
    --faint: #6f6f76;
    --line: #232326;
    --line-2: #303034;
    --on-ink: #0c0c0d;
    --slab: #151518;
    --slab-2: #1d1d21;
    --on-slab: #f1f0eb;
    --slab-line: #2a2a2f;
    --blend: screen;
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px / 1.6 var(--font);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01" 1, "cv11" 1;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; }
::selection { background: var(--ink); color: var(--on-ink); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - var(--gutter) * 2, var(--wrap)); margin-inline: auto; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 10px 16px; border-radius: 10px;
  background: var(--ink); color: var(--on-ink); text-decoration: none;
}
.skip:focus { top: 16px; }

em { font-family: var(--serif); font-style: italic; font-weight: 400; letter-spacing: -.01em; }

/* ------------------------------------------------------------ buttons */

.btn {
  display: inline-flex; align-items: center; gap: .55em;
  height: 48px; padding: 0 22px;
  border-radius: 999px;
  font: 500 15px/1 var(--font);
  text-decoration: none; white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.btn .arr { transition: transform .25s var(--ease); }
.btn:hover .arr { transform: translateX(3px); }
.btn-ink { background: var(--ink); color: var(--on-ink); }
.btn-ink:hover { background: var(--ink-2); }
.btn-line { border: 1px solid var(--line-2); color: var(--ink); }
.btn-line:hover { border-color: var(--ink); }

/* ------------------------------------------------------------ nav */

.nav {
  position: sticky; top: 0; z-index: 50;
  height: var(--nav-h);
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease);
}
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav-inner { height: 100%; display: flex; align-items: center; gap: 28px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.mark { width: 30px; height: 30px; overflow: visible; }
.mark path, .mark circle, .mark rect { fill: none; stroke-width: 5.2; }
.mk-tri { stroke: var(--blue); stroke-linejoin: round; }
.mk-cir { stroke: var(--amber); }
.mk-sq { stroke: var(--green); stroke-linejoin: round; }
.brand .word { font: 700 25px/1 var(--font); letter-spacing: -.045em; transform: translateY(-1px); }
.brand:hover .mk-tri { transform: rotate(-12deg); }
.mark > * { transform-box: fill-box; transform-origin: center; transition: transform .6s var(--ease); }
.brand:hover .mk-sq { transform: rotate(45deg) scale(.86); }
.brand:hover .mk-cir { transform: scale(.9); }

.menu { display: flex; gap: 30px; margin-left: auto; }
.menu a { font: 500 15px/1 var(--font); color: var(--muted); text-decoration: none; transition: color .2s; }
.menu a:hover { color: var(--ink); }
.menu .menu-contact { display: none; }
.nav-cta { height: 42px; padding: 0 18px; font-size: 14px; }

.burger { display: none; margin-left: auto; width: 44px; height: 44px; border: 0; background: none; padding: 0; cursor: pointer; position: relative; }
.burger i { position: absolute; left: 11px; right: 11px; height: 1.5px; background: var(--ink); transition: transform .3s var(--ease), top .3s var(--ease); }
.burger i:first-child { top: 18px; }
.burger i:last-child { top: 25px; }
.nav.is-open .burger i:first-child { top: 21.5px; transform: rotate(45deg); }
.nav.is-open .burger i:last-child { top: 21.5px; transform: rotate(-45deg); }

/* ------------------------------------------------------------ hero */

.hero { padding: clamp(40px, 7vw, 96px) 0 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); align-items: center; gap: clamp(24px, 4vw, 64px); }

.eyebrow, .kicker, .clients-label, .post-cat, .contact-label, .step-num {
  font: 500 12.5px/1.2 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
}
.eyebrow { display: flex; flex-wrap: wrap; gap: .7em; margin: 0 0 28px; }
.eyebrow .sep { color: var(--line-2); }

.display {
  margin: 0;
  font: 600 clamp(46px, 7.4vw, 108px) / .98 var(--font);
  letter-spacing: -.047em;
  text-wrap: balance;
}
.display em { letter-spacing: -.02em; }
.lead {
  max-width: 34em;
  margin: 30px 0 0;
  font-size: clamp(18px, 1.55vw, 21px);
  line-height: 1.55;
  color: var(--muted);
  text-wrap: pretty;
}
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 40px; }

.hero-art { position: relative; aspect-ratio: 1; }
.prims { width: 100%; height: 100%; overflow: visible; }
.grid-line { stroke: var(--line-2); stroke-width: 1; }
.p { transform-box: fill-box; transform-origin: center; }
.p circle, .p rect, .p path { stroke-width: 1.4; vector-effect: non-scaling-stroke; }
.p-cir circle { fill: color-mix(in srgb, var(--amber) 16%, transparent); stroke: var(--amber); mix-blend-mode: var(--blend); }
.p-sq rect { fill: color-mix(in srgb, var(--green) 14%, transparent); stroke: var(--green); mix-blend-mode: var(--blend); }
.p-tri path { fill: color-mix(in srgb, var(--blue) 14%, transparent); stroke: var(--blue); stroke-linejoin: round; mix-blend-mode: var(--blend); }
.p .p-diag { fill: none; stroke-dasharray: 3 6; opacity: .75; }
.p-cir .p-core { fill: var(--amber); stroke: none; }
.dims path { stroke: var(--faint); stroke-width: 1; fill: none; }
.dims text { font: 500 12px var(--mono); letter-spacing: .06em; fill: var(--faint); text-anchor: middle; text-transform: uppercase; }

.par { transition: transform .9s var(--ease); }
.par-1 { transform: translate(calc(var(--mx, 0) * -14px), calc(var(--my, 0) * -10px)); }
.par-2 { transform: translate(calc(var(--mx, 0) * 10px), calc(var(--my, 0) * 12px)); }
.par-3 { transform: translate(calc(var(--mx, 0) * 6px), calc(var(--my, 0) * -16px)); }

@media (prefers-reduced-motion: no-preference) {
  .p-cir { animation: drift 14s var(--ease) infinite alternate; }
  .p-sq { animation: turn 90s linear infinite; }
  .p-tri { animation: drift 17s var(--ease) -6s infinite alternate-reverse; }
}
@keyframes drift { from { transform: translate(0, -9px); } to { transform: translate(0, 9px); } }
@keyframes turn { to { transform: rotate(360deg); } }

.clients {
  display: flex; align-items: baseline; gap: 28px;
  margin-top: clamp(48px, 7vw, 88px);
  padding: 26px 0 30px;
  border-top: 1px solid var(--line);
}
.clients-label { flex: none; margin: 0; }
.clients { align-items: center; }
.clients-list {
  flex: 1;
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px 30px;
  margin: 0; padding: 0; list-style: none;
}
.clients-list li { display: flex; }
.logo { display: block; fill: var(--faint); opacity: .9; transition: fill .25s var(--ease), opacity .25s var(--ease); }
.clients-list li:hover .logo { fill: var(--ink); opacity: 1; }

/* ------------------------------------------------------------ sections */

.section { padding: clamp(80px, 11vw, 150px) 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--paper-2); }

.section-head { max-width: 860px; margin-bottom: clamp(44px, 6vw, 72px); }
.section-head-row { max-width: none; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.kicker { display: flex; align-items: center; gap: 14px; margin: 0 0 22px; }
.kicker .num { color: var(--ink); }
.kicker .num::after { content: ""; display: inline-block; width: 28px; height: 1px; margin-left: 14px; vertical-align: middle; background: var(--line-2); }

.h2 {
  margin: 0;
  font: 600 clamp(36px, 4.9vw, 68px) / 1.02 var(--font);
  letter-spacing: -.04em;
  text-wrap: balance;
}
.section-lead { max-width: 40em; margin: 24px 0 0; font-size: 19px; color: var(--muted); text-wrap: pretty; }

/* services */
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card {
  display: flex; flex-direction: column;
  padding: 32px 30px 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .3s var(--ease), transform .3s var(--ease), box-shadow .3s var(--ease);
}
.card:hover { border-color: var(--line-2); transform: translateY(-3px); box-shadow: 0 24px 48px -32px rgba(0, 0, 0, .28); }
.card-icon { width: 40px; height: 40px; margin-bottom: 26px; overflow: visible; }
.card-icon > * { fill: none; stroke-width: 1.6; transform-box: fill-box; transform-origin: center; transition: transform .7s var(--ease); }
.ci-tri { stroke: var(--blue); stroke-linejoin: round; }
.ci-sq { stroke: var(--green); }
.ci-cir { stroke: var(--amber); }
.ci-link { stroke: var(--faint); }
.card:hover .ci-sq { transform: rotate(90deg); }
.card:hover .ci-tri { transform: rotate(-120deg); }
.card:hover .ci-cir { transform: scale(1.12); }
.card h3 { margin: 0 0 10px; font: 600 23px/1.2 var(--font); letter-spacing: -.02em; }

.card-ai {
  grid-column: 1 / -1;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(28px, 4vw, 64px); align-items: center;
  padding: clamp(30px, 3.6vw, 48px);
  background: var(--slab); color: var(--on-slab); border-color: var(--slab-line);
  background-image: radial-gradient(90% 120% at 100% 0%, color-mix(in srgb, var(--blue) 9%, transparent), transparent 60%);
}
.card-ai:hover { border-color: var(--slab-line); }
.card-ai h3 { font-size: clamp(28px, 3vw, 38px); letter-spacing: -.03em; }
.card.card-ai p { color: color-mix(in srgb, var(--on-slab) 72%, transparent); font-size: 17px; }
.card-ai .tags a { border-color: color-mix(in srgb, var(--on-slab) 22%, transparent); color: var(--on-slab); }
.card-ai .tags a:hover { background: var(--on-slab); border-color: var(--on-slab); color: var(--slab); }
.card-flag {
  display: inline-block; margin: 0 0 14px !important; padding: 4px 10px;
  border: 1px solid color-mix(in srgb, var(--on-slab) 25%, transparent); border-radius: 999px;
  font: 500 11.5px/1.2 var(--mono) !important; letter-spacing: .08em; text-transform: uppercase;
  color: var(--on-slab) !important;
}
.ai-demo {
  border: 1px solid color-mix(in srgb, var(--on-slab) 16%, transparent);
  border-radius: 14px;
  background: color-mix(in srgb, var(--on-slab) 5%, transparent);
  padding: 0 22px 20px;
  font: 400 14px/1.65 var(--mono);
}
.ai-bar { display: flex; align-items: center; gap: 7px; height: 42px; margin: 0 -22px 16px; padding: 0 16px; border-bottom: 1px solid color-mix(in srgb, var(--on-slab) 12%, transparent); }
.ai-bar i { width: 9px; height: 9px; border-radius: 50%; border: 1px solid color-mix(in srgb, var(--on-slab) 30%, transparent); }
.ai-bar span { margin-left: auto; font-size: 12px; color: color-mix(in srgb, var(--on-slab) 50%, transparent); }
.ai-demo p { margin: 0; }
.card-ai .ai-q { color: var(--on-slab); font-size: 14px; }
.ai-q span { color: var(--blue); margin-right: .6ch; }
.card-ai .ai-a { margin-top: 12px; min-height: 8.3em; color: color-mix(in srgb, var(--on-slab) 78%, transparent); font-size: 14px; }
.ai-a.is-streaming::after { content: ""; display: inline-block; width: .6em; height: 1.05em; margin-left: 2px; vertical-align: -.18em; background: var(--green); animation: caret 1s steps(1) infinite; }
@keyframes caret { 50% { opacity: 0; } }
.ai-meta { display: flex; gap: 8px; margin-top: 16px !important; }
.ai-meta span { padding: 3px 9px; border-radius: 999px; font-size: 11.5px; letter-spacing: .04em; color: color-mix(in srgb, var(--on-slab) 60%, transparent); border: 1px solid color-mix(in srgb, var(--on-slab) 16%, transparent); }
.ai-meta span:first-child { color: var(--green); border-color: color-mix(in srgb, var(--green) 45%, transparent); }
.card p { margin: 0 0 24px; color: var(--muted); font-size: 16px; }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: auto 0 0; padding: 0; list-style: none; }
.tags a {
  display: inline-block; padding: 6px 12px;
  border: 1px solid var(--line); border-radius: 999px;
  font: 500 13.5px/1.2 var(--font); color: var(--ink-2);
  text-decoration: none;
  transition: background .2s, color .2s, border-color .2s;
}
.tags a:hover { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }

/* approach */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; margin: 0; padding: 0; list-style: none; counter-reset: step; }
.step { position: relative; padding: 30px 28px 0 0; border-top: 1px solid var(--line-2); }
.step::before { content: ""; position: absolute; top: -4px; left: 0; width: 7px; height: 7px; border-radius: 50%; background: var(--ink); }
.step-num { display: block; margin-bottom: 30px; color: var(--faint); }
.step h3 { margin: 0 0 12px; font: 600 24px/1.2 var(--font); letter-spacing: -.02em; }
.step p { margin: 0; color: var(--muted); font-size: 16px; }

/* why */
.why { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 56px 48px; }
.why-item h3 { margin: 0 0 12px; font: 600 21px/1.25 var(--font); letter-spacing: -.015em; }
.why-item p { margin: 0; color: var(--muted); font-size: 16px; }
.why-item::before { content: ""; display: block; width: 22px; height: 2px; margin-bottom: 22px; background: var(--ink); }
.values {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 24px;
  margin: clamp(64px, 8vw, 110px) 0 0; padding-top: 30px;
  border-top: 1px solid var(--line);
}
.values dt { margin-bottom: 8px; font: 500 12.5px/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.values dd { margin: 0; color: var(--muted); font-size: 15px; }

/* blog */
.posts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.post {
  display: flex; flex-direction: column; gap: 18px;
  min-height: 250px; padding: 30px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  text-decoration: none;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.post:hover { border-color: var(--line-2); transform: translateY(-3px); }
.post h3 { margin: 0; font: 600 23px/1.2 var(--font); letter-spacing: -.02em; text-wrap: balance; }
.post-more { margin-top: auto; font: 500 15px/1 var(--font); color: var(--muted); }
.post:hover .post-more { color: var(--ink); }
.post .arr { display: inline-block; transition: transform .25s var(--ease); }
.post:hover .arr { transform: translateX(3px); }

/* contact */
.contact { padding-bottom: clamp(90px, 12vw, 170px); }
.contact-title { font-size: clamp(46px, 8.4vw, 124px); margin-top: 6px; }
.contact-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 16px; margin-top: clamp(48px, 6vw, 80px); }
.contact-card {
  position: relative;
  display: flex; flex-direction: column; justify-content: space-between; gap: 30px;
  min-height: 150px; padding: 26px 28px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--card);
  text-decoration: none;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.contact-card:hover { border-color: var(--line-2); }
.contact-value { font: 500 20px/1.3 var(--font); letter-spacing: -.015em; }
.contact-addr { font-size: 17px; line-height: 1.45; }
.contact-primary { min-height: 220px; background: var(--slab); color: var(--on-slab); border-color: var(--slab-line); }
.contact-primary:hover { background: var(--slab-2); }
.contact-primary .contact-label { color: color-mix(in srgb, var(--on-slab) 60%, transparent); }
.contact-primary .contact-value { font-size: clamp(26px, 3vw, 40px); letter-spacing: -.03em; }
.contact-primary .arr { position: absolute; top: 24px; right: 28px; font-size: 24px; transition: transform .3s var(--ease); }
.contact-primary:hover .arr { transform: translate(3px, -3px); }

/* footer */
.footer { background: var(--paper-2); border-top: 1px solid var(--line); padding: clamp(64px, 8vw, 100px) 0 36px; }
.footer-top { display: grid; grid-template-columns: minmax(0, 250px) minmax(0, 1fr); gap: clamp(32px, 4vw, 64px); }
.footer-brand p { margin: 20px 0 28px; max-width: 22em; color: var(--muted); font-size: 15px; }
.footer-cols { display: grid; grid-template-columns: repeat(5, max-content); justify-content: space-between; column-gap: 28px; }
@media (max-width: 1180px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); justify-content: stretch; }
}
.footer-cols h2 { margin: 0 0 16px; font: 500 12.5px/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--ink); }
.footer-cols ul { margin: 0 0 32px; padding: 0; list-style: none; }
.footer-cols li { margin: 0 0 10px; }
.footer-cols a { color: var(--muted); font-size: 14.5px; text-decoration: none; transition: color .2s; }
.footer-cols a:hover { color: var(--ink); }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 32px;
  margin-top: 56px; padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--faint); font-size: 14px;
}
.footer-bottom p { margin: 0; }
.footer-bottom a { color: var(--muted); text-decoration: none; }
.footer-bottom a:hover { color: var(--ink); }

/* ------------------------------------------------------------ reveal */

.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ------------------------------------------------------------ responsive */

@media (max-width: 1080px) {
  .cards, .posts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .why { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 48px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .card-ai { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .menu, .nav-cta { display: none; }
  .burger { display: block; }
  .nav.is-open .menu {
    display: flex; flex-direction: column; gap: 0;
    position: fixed; inset: var(--nav-h) 0 auto 0;
    padding: 8px var(--gutter) 28px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }
  .nav.is-open .menu a { padding: 16px 0; font-size: 22px; color: var(--ink); border-bottom: 1px solid var(--line); }
  .nav.is-open .menu .menu-contact { display: block; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; width: 88%; margin: 8px auto 0; }
  .clients { flex-direction: column; gap: 14px; }
  .clients-list { font-size: 16px; gap: 6px 20px; }
  .section-head-row { flex-direction: column; align-items: flex-start; }
  .footer-cols { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .values { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .cards, .posts, .why, .steps { grid-template-columns: 1fr; }
  .card { padding: 26px 22px; }
  .contact-grid { grid-template-columns: 1fr; }
  .clients-list { justify-content: flex-start; gap: 18px 28px; }
  .actions .btn { flex: 1 1 auto; justify-content: center; }
}