/* Kirtan Technologies: site styles.
   Content lives in index.html; nothing in here needs editing to add or change entries. */

/* ---------- Fonts (IBM Plex, self-hosted, Latin-1 subset; licence in fonts/) ---------- */
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/plex-sans-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000, U+000D, U+0020-007E, U+00A0-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2013-2014, U+2018-201A, U+201C-201E, U+2020-2022, U+2026, U+2030, U+2039-203A, U+2044, U+2074, U+20AC, U+2122, U+2212, U+FB01-FB02;
}
@font-face {
  font-family: "IBM Plex Sans";
  src: url("fonts/plex-sans-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000, U+000D, U+0020-007E, U+00A0-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2013-2014, U+2018-201A, U+201C-201E, U+2020-2022, U+2026, U+2030, U+2039-203A, U+2044, U+2074, U+20AC, U+2122, U+2212, U+FB01-FB02;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("fonts/plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000, U+000D, U+0020-007E, U+00A0-00FF, U+0131, U+0152-0153, U+02C6, U+02DA, U+02DC, U+2013-2014, U+2018-201A, U+201C-201E, U+2020-2022, U+2026, U+2030, U+2039-203A, U+2044, U+2074, U+20AC, U+2122, U+2212, U+FB01-FB02;
}

/* ---------- Tokens ---------- */
:root {
  color-scheme: light dark;

  --paper: #FAFAF7;
  --card: #FFFFFF;
  --ink: #15191C;
  --muted: #4B5357;
  --rule: #D9DCD7;
  --rule-strong: #B9BEB8;
  --accent: #1B6B66;        /* text-safe teal (6:1 on paper) */
  --accent-ink: #FFFFFF;    /* text on accent buttons */
  --brand-teal: #45A09B;    /* logo teal: decoration only */
  --brand-orange: #FF6600;  /* logo orange: decoration only */
  --tag-bg: #F0F2EE;

  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;

  --wrap: 72rem;
  --gutter: 1rem;
  --space: clamp(3.5rem, 8vw, 6rem);
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0E1314;
    --card: #141B1C;
    --ink: #E6EBEA;
    --muted: #A3ADAE;
    --rule: #293536;
    --rule-strong: #3D4C4D;
    --accent: #6CC4BE;
    --accent-ink: #0E1314;
    --brand-orange: #FF7A1A;
    --tag-bg: #1A2324;
  }
}

@media (min-width: 40rem) {
  :root { --gutter: 2rem; }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  overflow-wrap: break-word;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.2;
  margin: 0;
  text-wrap: balance;
}

p, ul, ol, dl { margin: 0; }

a { color: var(--accent); text-underline-offset: 0.18em; }
a:hover { text-decoration-thickness: 2px; }

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

img, svg { display: block; max-width: 100%; }

[id] { scroll-margin-top: 1.5rem; }

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

.nowrap { white-space: nowrap; }

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

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.skip-link {
  position: absolute;
  left: var(--gutter);
  top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 0.75rem; }

.mono {
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--rule);
}
.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 2rem;
  padding-block: 0.875rem;
}
.brand img { width: auto; height: 52px; }
@media (min-width: 40rem) {
  .brand img { height: 64px; }
}

.site-nav ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
}
.site-nav a {
  font-family: var(--mono);
  font-size: 0.875rem;
  color: var(--ink);
  text-decoration: none;
  padding-block: 0.375rem;
  display: inline-block;
}
.site-nav a:hover { color: var(--accent); text-decoration: underline; }
@media (max-width: 30rem) {
  .site-nav ul { gap: 0.25rem 0.9rem; }
  .site-nav a { font-size: 0.8125rem; }
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(3rem, 7vw, 5.5rem) var(--space); }
.hero .wrap {
  display: grid;
  gap: 2.5rem;
}
@media (min-width: 60rem) {
  .hero .wrap {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
  }
}
.eyebrow {
  color: var(--accent);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.hero h1 {
  font-size: clamp(2.1rem, 5.2vw, 3.4rem);
  letter-spacing: -0.015em;
  max-width: 20ch;
}
.tagline {
  margin-top: 1rem;
  font-size: clamp(1.25rem, 2.4vw, 1.5rem);
  line-height: 1.35;
  color: var(--ink);
  max-width: 32ch;
}
.lead {
  margin-top: 1.25rem;
  max-width: 40rem;
  font-size: 1.1875rem;
  color: var(--muted);
}
.actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.button {
  display: inline-flex;
  align-items: center;
  min-height: 2.875rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--accent);
  border-radius: 3px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
}
.button.primary { background: var(--accent); color: var(--accent-ink); }
.button.primary:hover { filter: brightness(1.1); text-decoration: none; }
.button.secondary { color: var(--accent); background: transparent; }
.button.secondary:hover { background: var(--tag-bg); text-decoration: none; }

/* Spec table: the "datasheet" summary next to the hero text */
.spec {
  border: 1px solid var(--rule-strong);
  background: var(--card);
}
.spec-title {
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--rule-strong);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}
.spec-title::after {
  content: "";
  width: 0.6rem; height: 0.6rem;
  align-self: center;
  background: var(--brand-orange);
  border-radius: 1px;
}
.spec dl { display: grid; grid-template-columns: auto 1fr; }
.spec dt, .spec dd {
  padding: 0.6rem 1rem;
  border-top: 1px solid var(--rule);
}
.spec dt:first-of-type, .spec dd:first-of-type { border-top: 0; }
.spec dt { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); padding-top: 0.75rem; }
.spec dd { margin: 0; font-size: 0.9375rem; }

/* ---------- Sections ---------- */
.section {
  padding-block: var(--space);
  border-top: 1px solid var(--rule);
}
.section-head {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  max-width: 46rem;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.2rem);
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
  gap: 0.875rem;
}
.sec-num {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--accent);
  border: 1px solid currentColor;
  padding: 0.05rem 0.4rem;
  border-radius: 2px;
  position: relative;
  top: -0.2em;
}
.section-head p { color: var(--muted); }

/* ---------- Catalogue grid (capabilities and past work) ---------- */
/* Cells draw their own 1px rules (outline) over a 1px gap. */
.grid,
.contact {
  display: grid;
  gap: 1px;
  background: var(--card);
  border: 1px solid var(--rule);
}
.grid > *,
.contact > * { outline: 1px solid var(--rule); }

/* Catalogue grids: one column on narrow screens, three from 62rem. Rows fill
   exactly when the number of entries is a multiple of three. */
.grid { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 62rem) {
  .grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

.entry {
  background: var(--card);
  padding: 1.5rem 1.5rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}
.entry-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}
.entry-icon {
  width: 2.25rem;
  height: 2.25rem;
  color: var(--accent);
  flex: none;
}
.entry-num { color: var(--muted); }
.entry h3 { font-size: 1.1875rem; }
.entry-summary { color: var(--muted); }
.entry > ul:not(.tags) {
  padding-left: 1.1rem;
  display: grid;
  gap: 0.35rem;
  font-size: 0.96875rem;
}
.entry li::marker { color: var(--brand-teal); }
.tags {
  margin-top: auto;
  padding-top: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  list-style: none;
  padding-left: 0;
}
.tags li {
  font-family: var(--mono);
  font-size: 0.75rem;
  line-height: 1.4;
  padding: 0.15rem 0.45rem;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  background: var(--tag-bg);
  color: var(--ink);
}

/* Past-work cards */
.work .entry-for {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.work dl {
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--rule-strong);
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.35rem 1rem;
  font-size: 0.875rem;
}
.work dt { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); padding-top: 0.15rem; }
.work dd { margin: 0; }

/* Featured case study (full width, below a grid) */
.feature {
  margin-top: 2.5rem;
  border: 1px solid var(--rule-strong);
  background: var(--card);
  padding: 1.75rem 1.5rem;
  display: grid;
  gap: 1.25rem 3rem;
}
@media (min-width: 62rem) {
  .feature { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); padding: 2rem 2.25rem; }
}
.feature-text { display: grid; gap: 0.875rem; align-content: start; }
.feature .entry-for { color: var(--accent); text-transform: uppercase; letter-spacing: 0.06em; }
.feature h3 { font-size: 1.375rem; }
.feature-facts {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem 1rem;
  align-content: start;
  font-size: 0.9375rem;
}
@media (min-width: 62rem) {
  .feature-facts { border-left: 1px dashed var(--rule-strong); padding-left: 2rem; }
}
.feature-facts dt { font-family: var(--mono); font-size: 0.75rem; color: var(--muted); padding-top: 0.2rem; }
.feature-facts dd { margin: 0; }
.small-print { font-size: 0.8125rem; margin-top: 0.75rem; }

/* Inline "A · B · C" lists whose items never break internally */
.dots {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0 0.45rem;
}
.dots li { white-space: nowrap; }
.dots li:not(:last-child)::after {
  content: "·";
  margin-left: 0.45rem;
  color: var(--muted);
}

/* Platforms strip */
.platforms {
  margin-top: 2.5rem;
  border: 1px solid var(--rule);
  background: var(--card);
}
.platforms-title {
  padding: 0.55rem 1rem;
  border-bottom: 1px solid var(--rule);
  font-weight: 400;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.platforms dl { display: grid; }
.platforms div {
  display: grid;
  gap: 0.25rem 1.5rem;
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--rule);
}
.platforms div:first-child { border-top: 0; }
@media (min-width: 40rem) {
  .platforms div { grid-template-columns: 11rem 1fr; }
}
.platforms dt { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); padding-top: 0.1rem; }
.platforms dd { margin: 0; font-size: 0.9375rem; }

/* ---------- Process ---------- */
.steps {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  counter-reset: step;
}
@media (min-width: 60rem) {
  .steps { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}
.steps li {
  background: var(--card);
  padding: 1.25rem 1.25rem 1.5rem;
  display: grid;
  gap: 0.5rem;
  align-content: start;
  position: relative;
}
.steps li::before {
  counter-increment: step;
  content: "0" counter(step);
  font-family: var(--mono);
  font-size: 0.8125rem;
  color: var(--accent);
}
@media (min-width: 60rem) {
  .steps li:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 1.65rem;
    right: -0.45rem;
    width: 0.8rem;
    height: 0.8rem;
    background: var(--card);
    border-top: 1px solid var(--rule-strong);
    border-right: 1px solid var(--rule-strong);
    transform: rotate(45deg);
    z-index: 1;
  }
}
.steps h3 { font-size: 1.0625rem; }
.steps p { color: var(--muted); font-size: 0.9375rem; }
.note {
  margin-top: 1.5rem;
  color: var(--muted);
  font-size: 0.9375rem;
  max-width: 46rem;
}

/* ---------- About ---------- */
.about {
  display: grid;
  gap: 2rem;
}
@media (min-width: 60rem) {
  .about { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); }
}
.about-name h3 { font-size: 1.375rem; }
.about-name p { color: var(--muted); margin-top: 0.25rem; }
.about-text { display: grid; gap: 1rem; max-width: 44rem; }

/* ---------- Contact ---------- */
.contact { grid-template-columns: minmax(0, 1fr); }
@media (min-width: 44rem) {
  .contact { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 64rem) {
  .contact { grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr); }
  .contact-address { grid-column: 1 / -1; }
}
.contact > div {
  background: var(--card);
  padding: 1.25rem 1.5rem 1.5rem;
  display: grid;
  gap: 0.375rem;
  align-content: start;
}
.contact dt { font-family: var(--mono); font-size: 0.8125rem; color: var(--muted); }
.contact dd { margin: 0; font-size: 1.0625rem; }
.contact address { font-style: normal; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--rule);
  padding-block: 1.75rem 2.25rem;
  color: var(--muted);
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
}

@media print {
  .site-nav, .skip-link, .actions { display: none; }
  .section { break-inside: avoid-page; }
}

/* Very narrow screens: let long list items wrap rather than overflow */
@media (max-width: 22rem) {
  .dots li { white-space: normal; }
}