/* ==========================================================================
   Linx Insights — applied AI for industrial operations
   Design tokens: cool-concrete drawing sheet, graphite instrument panels,
   deck-derived teal accent, amber reserved for measured results.
   ========================================================================== */

:root {
  /* ground + ink */
  --paper:        #F4F5F3;
  --paper-2:      #ECEEEB;
  --card:         #FFFFFF;
  --ink:          #0E1519;
  --ink-2:        #16212A;

  /* cool-biased neutrals */
  --text:         #17222A;
  --text-2:       #4C5B64;
  --text-3:       #74838B;
  --rule:         #D5DAD8;
  --rule-strong:  #BFC6C3;

  /* accent (from the Linx deck) + data-only signal */
  --teal:         #0097A7;
  --teal-deep:    #00727E;
  --teal-bright:  #22B8C8;
  --amber:        #A8690F;
  --amber-bright: #E8A33D;

  /* type */
  --display: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body:    "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* layout */
  --container: 1200px;
  --pad: clamp(20px, 5vw, 48px);
  --rail: 190px;
  --gutter: 48px;
}

/* --------------------------------------------------------------- reset -- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
img, svg { max-width: 100%; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: #fff;
  padding: 12px 18px;
  font: 500 0.8125rem/1 var(--mono);
}
.skip-link:focus { left: 12px; top: 12px; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ------------------------------------------------------------ primitives -- */

.wrap {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--pad);
}

.eyebrow {
  font: 500 0.6875rem/1.4 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  margin: 0;
}

.lede {
  font-size: 1.1875rem;
  line-height: 1.6;
  color: var(--text-2);
  max-width: 62ch;
}

.metric {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  color: var(--amber);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 500 0.9375rem/1 var(--body);
  letter-spacing: 0.005em;
  padding: 15px 24px;
  border: 1px solid transparent;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color .18s ease, border-color .18s ease,
              color .18s ease, transform .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn .arw { transition: transform .18s ease; }
.btn:hover .arw { transform: translateX(3px); }

.btn--primary {
  background: var(--teal);
  color: #fff;
}
.btn--primary:hover { background: var(--teal-deep); }

.btn--ghost {
  border-color: rgba(255,255,255,.28);
  color: #fff;
}
.btn--ghost:hover { border-color: #fff; background: rgba(255,255,255,.07); }

.btn--outline {
  border-color: var(--rule-strong);
  color: var(--text);
  background: transparent;
}
.btn--outline:hover { border-color: var(--ink); background: rgba(14,21,25,.04); }

/* section shell --------------------------------------------------------- */

.band { border-top: 1px solid var(--rule); }

.band__inner {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 0 var(--gutter);
  padding-block: clamp(64px, 8vw, 112px);
}

.band__rail {
  border-right: 1px solid var(--rule);
  padding-right: var(--gutter);
  margin-right: calc(var(--gutter) * -1);
  position: relative;
}
.band__rail-inner { position: sticky; top: 104px; }
.band__rail .eyebrow { margin-bottom: 12px; }
.band__rail-note {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text-3);
  max-width: 22ch;
}

.band__main > * + * { margin-top: 28px; }

.band__title {
  font-size: clamp(1.9rem, 3.4vw, 2.75rem);
  max-width: 20ch;
}

@media (max-width: 900px) {
  .band__inner { grid-template-columns: 1fr; gap: 24px; }
  .band__rail {
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    padding-right: 0;
    margin-right: 0;
    padding-bottom: 18px;
  }
  .band__rail-inner { position: static; }
  .band__rail-note { max-width: 46ch; }
}

/* dark panels ----------------------------------------------------------- */

.dark {
  background: var(--ink);
  color: #E7EDEF;
  --text: #E7EDEF;
  --text-2: #A9B7BD;
  --text-3: #7C8B92;
  --rule: rgba(255,255,255,.12);
  --rule-strong: rgba(255,255,255,.24);
  --teal: var(--teal-bright);
  --amber: var(--amber-bright);
}
.dark h1, .dark h2, .dark h3 { color: #F3F7F8; }
.dark .btn--primary { background: var(--teal-bright); color: #06232A; }
.dark .btn--primary:hover { background: #4FD0DD; }

/* ================================================================ header == */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(14,21,25,0);
  transition: background-color .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: var(--ink);
  border-bottom-color: rgba(255,255,255,.12);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: #fff;
  font-family: var(--display);
  font-weight: 700;
  font-stretch: 108%;
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
}
.brand svg { color: var(--teal-bright); flex: none; }
.brand span { white-space: nowrap; }
.brand b { font-weight: 700; }
.brand i {
  font-style: normal;
  font-weight: 400;
  color: rgba(255,255,255,.62);
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav a {
  font: 400 0.9rem/1 var(--body);
  color: rgba(231,237,239,.78);
  padding: 10px 14px;
  border-radius: 2px;
  transition: color .16s ease, background-color .16s ease;
}
.nav a:hover { color: #fff; background: rgba(255,255,255,.07); }

.header-cta { margin-left: 12px; padding: 12px 20px; font-size: 0.875rem; }

.nav-toggle {
  display: none;
  margin-left: auto;
  background: transparent;
  border: 1px solid rgba(255,255,255,.24);
  border-radius: 2px;
  color: #fff;
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 11px 14px;
  cursor: pointer;
}

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav {
    position: absolute;
    left: 0; right: 0; top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #0E1519;
    border-block: 1px solid rgba(255,255,255,.12);
    padding: 8px var(--pad) 20px;
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .header-cta { margin: 16px 0 0; justify-content: center; }
}

/* ================================================================== hero == */

.hero {
  position: relative;
  overflow: hidden;
  margin-top: -76px;
  padding-top: 76px;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 60% at 78% 34%, rgba(0,151,167,.22), transparent 70%),
    radial-gradient(46% 46% at 8% 96%, rgba(0,151,167,.10), transparent 70%);
}
.hero > .wrap { position: relative; z-index: 1; }

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
  padding-block: clamp(64px, 9vw, 116px) clamp(56px, 7vw, 88px);
}

.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--teal-bright);
  margin-bottom: 26px;
}
.hero__eyebrow::before {
  content: "";
  width: 34px;
  height: 1px;
  background: currentColor;
  flex: none;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.15rem);
  font-stretch: 106%;
  letter-spacing: -0.032em;
  color: #FFF;
  max-width: 15ch;
}
.hero h1 em {
  font-style: normal;
  color: var(--teal-bright);
}

.hero__lede {
  margin-top: 26px;
  font-size: clamp(1.0625rem, 1.4vw, 1.1875rem);
  line-height: 1.62;
  color: #A9B7BD;
  max-width: 54ch;
}

.hero__cta {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 940px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__figure { order: 2; }
}
/* Below this width the diagram's labels are no longer legible — drop it
   rather than ship an illustration nobody can read. */
@media (max-width: 700px) {
  .hero__figure { display: none; }
}

/* convergence diagram --------------------------------------------------- */

.hero__figure { position: relative; }
.diagram { width: 100%; height: auto; display: block; }
.diagram text {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  fill: #8FA0A8;
}
.diagram .dg-label-out { fill: #C6D2D7; }
.diagram .dg-wire { fill: none; stroke: rgba(255,255,255,.16); stroke-width: 1; }
.diagram .dg-node { fill: #0E1519; stroke: rgba(255,255,255,.3); stroke-width: 1.5; }
.diagram .dg-node-out { stroke: var(--teal-bright); }
.diagram .dg-core {
  fill: rgba(0,151,167,.09);
  stroke: rgba(34,184,200,.5);
  stroke-width: 1;
}
.diagram .dg-core-mark {
  fill: none;
  stroke: var(--teal-bright);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.diagram .dg-core-label {
  fill: var(--teal-bright);
  font-size: 10px;
  letter-spacing: 0.2em;
}
.diagram .dg-spark {
  fill: none;
  stroke: var(--teal-bright);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-dasharray: 3 150;
  animation: flow 3.4s linear infinite;
}
@keyframes flow { from { stroke-dashoffset: 153; } to { stroke-dashoffset: 0; } }

/* sector strip ---------------------------------------------------------- */

.sectors {
  border-top: 1px solid rgba(255,255,255,.12);
  position: relative;
  z-index: 1;
}
.sectors__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 34px;
  padding-block: 22px;
}
.sectors__label {
  font: 500 0.6875rem/1.4 var(--mono);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #6E7D84;
  margin-right: 8px;
}
.sectors li {
  font-size: 0.9375rem;
  color: #C6D2D7;
  display: flex;
  align-items: center;
  gap: 10px;
}
.sectors li:not(.sectors__label)::before {
  content: "";
  width: 5px; height: 5px;
  background: var(--teal-bright);
  flex: none;
}

/* =========================================================== engagements == */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 620px) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.card {
  background: var(--card);
  padding: 30px 28px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background-color .2s ease;
}
.card:hover { background: #FBFCFB; }
.card__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}
.card__tag {
  font: 500 0.6875rem/1.4 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal-deep);
  white-space: nowrap;
}
.card h3 {
  font-size: 1.1875rem;
  letter-spacing: -0.015em;
}
.card p { color: var(--text-2); font-size: 0.9688rem; }
.card__list {
  margin-top: auto;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  display: grid;
  gap: 7px;
}
.card__list li {
  font-size: 0.875rem;
  color: var(--text-2);
  padding-left: 16px;
  position: relative;
}
.card__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.75em;
  width: 7px; height: 1px;
  background: var(--teal);
}

/* ============================================================ industries == */

.tabs {
  display: grid;
  grid-template-columns: minmax(0, 264px) minmax(0, 1fr);
  gap: 0;
  border: 1px solid var(--rule);
  background: var(--card);
}

.tabs__list {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--rule);
}
.tabs__btn {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--rule);
  border-left: 2px solid transparent;
  text-align: left;
  padding: 18px 20px;
  font: 500 0.9688rem/1.3 var(--body);
  color: var(--text-2);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: color .16s ease, background-color .16s ease, border-color .16s ease;
}
.tabs__btn:last-child { border-bottom: 0; }
.tabs__btn:hover { color: var(--text); background: var(--paper); }
.tabs__btn[aria-selected="true"] {
  color: var(--ink);
  border-left-color: var(--teal);
  background: var(--paper);
  font-weight: 500;
}
.tabs__btn .arw { opacity: 0; transition: opacity .16s ease; color: var(--teal); }
.tabs__btn[aria-selected="true"] .arw { opacity: 1; }

.tabs__panel { padding: clamp(26px, 3.4vw, 40px); }
.tabs__panel[hidden] { display: none; }
.tabs__panel h3 {
  font-size: 1.375rem;
  margin-bottom: 10px;
}
.tabs__panel > p { color: var(--text-2); max-width: 58ch; }

.uses {
  margin-top: 26px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
@media (min-width: 560px) {
  .uses { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
.uses li {
  background: var(--card);
  padding: 16px 18px;
  font-size: 0.9063rem;
  line-height: 1.5;
  color: var(--text-2);
}
.uses li strong {
  display: block;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 3px;
}

@media (max-width: 760px) {
  .tabs { grid-template-columns: 1fr; }
  .tabs__list {
    flex-direction: row;
    border-right: 0;
    border-bottom: 1px solid var(--rule);
    overflow-x: auto;
    scrollbar-width: thin;
  }
  .tabs__btn {
    border-bottom: 0;
    border-left: 0;
    border-top: 2px solid transparent;
    white-space: nowrap;
    padding: 15px 18px;
  }
  .tabs__btn[aria-selected="true"] { border-left-color: transparent; border-top-color: var(--teal); }
  .tabs__btn .arw { display: none; }
}

/* ================================================================== work == */

.work { border-top: 1px solid var(--rule); }
.work__row {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr) minmax(0, 230px);
  gap: 20px 32px;
  padding-block: 26px;
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.work__row:first-child { border-top: 1px solid var(--rule); }
.work__sector {
  font: 500 0.6875rem/1.5 var(--mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  padding-top: 4px;
}
.work__body h3 {
  font-size: 1.0625rem;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.work__body p { color: var(--text-2); font-size: 0.9375rem; max-width: 60ch; }
.work__result {
  display: grid;
  gap: 6px;
  padding-top: 2px;
}
.work__result span {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8438rem;
  line-height: 1.45;
  color: var(--amber);
  border-left: 2px solid var(--amber);
  padding-left: 12px;
}

@media (max-width: 860px) {
  .work__row { grid-template-columns: 1fr; gap: 12px; }
  .work__sector { padding-top: 0; }
}

/* ============================================================== approach == */

.phases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.phase {
  background: var(--card);
  padding: 28px 26px 30px;
  display: grid;
  gap: 12px;
  align-content: start;
}
.phase__no {
  font: 500 0.75rem/1 var(--mono);
  letter-spacing: 0.14em;
  color: var(--teal-deep);
  display: flex;
  align-items: center;
  gap: 10px;
}
.phase__no::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--rule);
}
.phase h3 { font-size: 1.1875rem; }
.phase p { color: var(--text-2); font-size: 0.9375rem; }
.phase__gate {
  margin-top: 6px;
  font-size: 0.8438rem;
  line-height: 1.5;
  color: var(--text-3);
  border-top: 1px solid var(--rule);
  padding-top: 12px;
}
.phase__gate b {
  display: block;
  font: 500 0.6875rem/1.4 var(--mono);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 4px;
}

/* ============================================================ engine note == */

.engine {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 18px;
}
.chips li {
  font: 400 0.8125rem/1 var(--mono);
  color: var(--text-2);
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  padding: 8px 11px;
}
.engine__out {
  border-left: 2px solid var(--teal);
  padding-left: 20px;
  display: grid;
  gap: 14px;
}
.engine__out li { font-size: 0.9375rem; color: var(--text-2); }
.engine__out li b {
  display: block;
  font-weight: 500;
  color: var(--text);
}

/* ============================================================== contact == */

.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px);
  padding-block: clamp(64px, 8vw, 104px);
  align-items: start;
}
.contact h2 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  font-stretch: 104%;
  color: #fff;
  max-width: 16ch;
}
.contact__lede { margin-top: 20px; color: #A9B7BD; max-width: 46ch; }
.contact__cta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }

.contact__side { display: grid; gap: 28px; }
.contact__block {
  border-top: 1px solid rgba(255,255,255,.14);
  padding-top: 18px;
}
.contact__block .eyebrow { color: #7C8B92; margin-bottom: 12px; }
.contact__block p { color: #A9B7BD; font-size: 0.9375rem; }

.people { display: grid; gap: 10px; }
.people a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.9688rem;
  color: #E7EDEF;
  border-bottom: 1px solid transparent;
  width: fit-content;
  transition: color .16s ease, border-color .16s ease;
}
.people a:hover { color: var(--teal-bright); border-bottom-color: var(--teal-bright); }
.people a span {
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: #7C8B92;
}

.regions { display: grid; gap: 8px; }
.regions li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.9375rem;
  color: #C6D2D7;
}
.regions li b {
  font: 500 0.6875rem/1.6 var(--mono);
  letter-spacing: 0.12em;
  color: var(--teal-bright);
  min-width: 26px;
}

@media (max-width: 820px) {
  .contact__grid { grid-template-columns: 1fr; }
}

/* =============================================================== footer == */

.site-footer {
  border-top: 1px solid rgba(255,255,255,.12);
  background: #0A1013;
  color: #7C8B92;
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 32px;
  padding-block: 30px;
  font-size: 0.8438rem;
}
.site-footer .brand { font-size: 0.9688rem; }
.site-footer__tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: #5E6D74;
}
.site-footer__meta { margin-left: auto; display: flex; gap: 24px; flex-wrap: wrap; }
.site-footer a:hover { color: var(--teal-bright); }

/* ============================================================== motion == */

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
}
.js .reveal.is-in {
  opacity: 1;
  transform: none;
  transition: opacity .7s cubic-bezier(.22,.61,.36,1),
              transform .7s cubic-bezier(.22,.61,.36,1);
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  .diagram .dg-spark { animation: none; opacity: .55; stroke-dasharray: none; }
  .btn:hover { transform: none; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}