/* SG Systems — black & white typographic landing */

:root {
  --bg: #050505;
  --fg: #ffffff;
  --dim: rgba(255, 255, 255, 0.62);
  --faint: rgba(255, 255, 255, 0.28);
  --line: rgba(255, 255, 255, 0.16);
  --display: "Archivo Black", "Archivo", "Helvetica Neue", Arial, sans-serif;
  --body: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --pad: clamp(1.25rem, 4vw, 4rem);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

/* paging is driven by js/main.js (wheel/keyboard); native snap fights
   trackpad momentum on macOS, so no scroll-snap / smooth here */
html { scroll-behavior: auto; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: clamp(0.95rem, 1.05vw, 1.125rem);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--fg); color: var(--bg); }

#field {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* ---------------------------------------------------------------- topbar */

.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem var(--pad);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  mix-blend-mode: difference;
}

.topbar a { color: var(--fg); text-decoration: none; }
.topbar nav { display: flex; gap: clamp(0.8rem, 2.5vw, 2rem); }
.topbar nav a, .cta-mini { opacity: 0.65; transition: opacity 0.2s; }
.topbar nav a:hover, .cta-mini:hover { opacity: 1; }

/* scroll-spy: the section currently on screen lights up in the header */
.topbar nav a { position: relative; padding-bottom: 0.45em; }

.topbar nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 100%;
  background: var(--fg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.topbar nav a.active { opacity: 1; }
.topbar nav a.active::after { transform: scaleX(1); }
.logo { font-family: var(--display); letter-spacing: 0.08em; }
.cta-mini { border: 1px solid var(--faint); padding: 0.5em 1em; border-radius: 999px; white-space: nowrap; }

/* ---------------------------------------------------------------- screens */

main { position: relative; z-index: 1; }

.screen {
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: clamp(4.5rem, 9vh, 6rem) 0 clamp(2rem, 5vh, 4rem);
}

.wrap {
  width: 100%;
  max-width: none;
  padding-inline: var(--pad);
}

/* split layout: text on one side, canvas shape occupies the other */
.split .text { width: min(52%, 46rem); }
.split.reverse { display: flex; justify-content: flex-end; }
.split.reverse .text { width: min(52%, 46rem); }

/* ------------------------------------------------------------ typography */

.giant {
  display: block;
  font-family: var(--display);
  font-weight: 900;
  text-transform: uppercase;
  font-size: clamp(3.2rem, 11vw, 12rem);
  line-height: 0.88;
  letter-spacing: -0.015em;
  white-space: nowrap;
}

.huge {
  font-family: var(--display);
  font-weight: 900;
  text-transform: uppercase;
  font-size: clamp(2.6rem, 6.2vw, 7rem);
  line-height: 0.92;
  letter-spacing: -0.01em;
  margin: 0.35em 0 0.4em;
}

.stack { display: flex; flex-direction: column; gap: 0.06em; }

.outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--fg);
  text-stroke: 1.5px var(--fg);
}

/* text bleeding past the viewport edge — readable, deliberately cropped */
.bleed-l { margin-left: calc(-1 * clamp(2rem, 7vw, 9rem)); }
.bleed-r { margin-right: calc(-1 * clamp(2rem, 7vw, 9rem)); margin-left: clamp(1rem, 4vw, 5rem); }
.shift-l { transform: translateX(calc(-1 * clamp(1.5rem, 5vw, 7rem))); }
.shift-r { transform: translateX(clamp(2rem, 8vw, 12rem)); }

.eyebrow {
  font-size: clamp(0.8rem, 1vw, 1rem);
  text-transform: uppercase;
  letter-spacing: 0.35em;
  color: var(--dim);
  margin-bottom: 1.2em;
}

.index {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--dim);
}

.lead { color: var(--dim); max-width: 46rem; margin: 1em 0; }
.lead.narrow { max-width: 38rem; }

.role, .meta {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.8rem;
  color: var(--dim);
  margin: 0.4em 0 1.2em;
}

.tech {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-transform: uppercase;
  margin-bottom: 1.4em;
}

.note { color: var(--faint); font-size: 0.9em; max-width: 40rem; margin-top: 1.4em; }

blockquote { border-left: 1px solid var(--line); padding-left: 1.4em; margin: 1.2em 0; }
blockquote p { color: var(--fg); font-size: 1.02em; }
blockquote cite { display: block; margin-top: 0.8em; font-style: normal; font-size: 0.8rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--dim); }

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

.hero .wrap { padding-top: 2rem; }

.hero .giant { font-size: clamp(3rem, 9.6vw, 10.5rem); }

.hero-foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

.hero-foot .lead { max-width: 40rem; margin: 0; }

.scroll-hint {
  position: absolute;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--faint);
  animation: hint 2.4s ease-in-out infinite;
}

@keyframes hint {
  0%, 100% { transform: translate(-50%, 0); opacity: 0.5; }
  50% { transform: translate(-50%, 0.5rem); opacity: 1; }
}

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

.btn {
  display: inline-block;
  border: 1px solid var(--fg);
  color: var(--bg);
  background: var(--fg);
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.85rem;
  padding: 1em 2em;
  border-radius: 999px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s, color 0.2s;
}

.btn:hover { background: transparent; color: var(--fg); }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--faint); }
.btn.ghost:hover { border-color: var(--fg); }
.btn.big { font-size: clamp(0.9rem, 1.4vw, 1.2rem); padding: 1.2em 2.6em; }

/* ------------------------------------------------------------- columns */

.cols3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.2rem, 3vw, 3rem);
  margin-top: clamp(1.5rem, 4vh, 3.5rem);
}

.cols3 h3 {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  line-height: 1;
  margin-bottom: 0.8em;
  border-top: 1px solid var(--line);
  padding-top: 0.9em;
}

.cols3 p, .cols3 li { color: var(--dim); font-size: 0.94em; }
.cols3 ul { list-style: none; }
.cols3 li { margin-bottom: 0.7em; padding-left: 1.1em; position: relative; }
.cols3 li::before { content: "·"; position: absolute; left: 0; color: var(--fg); }
.cols3.tight { margin-top: 1.5rem; }

/* ------------------------------------------------------------- lists */

.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.4rem;
  max-width: 42rem;
}

.tags li {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45em 1.1em;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--dim);
  cursor: default;
  transition: background 0.22s, color 0.22s, border-color 0.22s, transform 0.22s;
}

.tags li:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
  transform: translateY(-3px);
}

/* ------------------------------------------------------------- expertise */

.roles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

/* leave the right third of the screen to the canvas portrait */
.roles.with-side { width: min(100%, 60%); gap: clamp(1.2rem, 2.5vw, 2.5rem); }

.hover-hint {
  margin-top: 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--faint);
}

.roles dt {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(0.85rem, 1.15vw, 1.05rem);
  letter-spacing: 0.04em;
  border-top: 1px solid var(--line);
  padding: 0.7em 0.6em 0.15em;
  margin: 0.9em -0.6em 0;
  cursor: default;
  transition: background 0.18s, color 0.18s;
}

.roles dt:first-child { margin-top: 0; }
.roles dt:hover, .roles dt.is-active { background: var(--fg); color: var(--bg); }
.roles dd { color: var(--faint); font-size: 0.85em; margin-top: 0.15em; }

/* ------------------------------------------------------------ personas */

.personas-screen .cols3 { margin-top: clamp(3rem, 30vh, 36vh); }
.personas-screen .cols3 h3 { font-size: clamp(1rem, 1.5vw, 1.4rem); }
.cols3 article { transition: opacity 0.2s; }
.cols3 article:hover h3 { border-top-color: var(--fg); }

/* ------------------------------------------------------------- faq */

.faq { max-width: 56rem; margin-top: clamp(1rem, 3vh, 2.5rem); }

.side-caption {
  position: absolute;
  right: var(--pad);
  top: clamp(4.5rem, 24vh, 14rem);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--faint);
}

@media (max-width: 860px) {
  .side-caption { display: none; }
}

.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }

.faq summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(0.95rem, 1.5vw, 1.35rem);
  padding: 0.9em 2.5rem 0.9em 0;
  position: relative;
}

.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0.3rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--body);
  font-weight: 400;
  color: var(--dim);
  transition: transform 0.25s;
}

.faq details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq details p { color: var(--dim); padding: 0 0 1.2em; max-width: 48rem; }

/* ------------------------------------------------------------- contact */

.contact .wrap { display: flex; flex-direction: column; }

.contact .giant { font-size: clamp(2.4rem, 8.5vw, 9.5rem); }

.contact-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

.foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: clamp(2rem, 6vh, 4rem);
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
}

.foot nav { display: flex; gap: 1.5rem; }

.foot-note {
  flex-basis: 100%;
  color: var(--dim);
  letter-spacing: 0.14em;
  padding-bottom: 0.4rem;
}
.foot a { color: var(--dim); text-decoration: none; }
.foot a:hover { color: var(--fg); }

/* --------------------------------------------------------- domains */

.cols2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

.domain-card { border-top: 1px solid var(--line); padding-top: 1.1em; }

.domain-card h3 {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(1.5rem, 2.6vw, 2.6rem);
  line-height: 1;
}

.domain-card p { color: var(--dim); margin-top: 0.8em; max-width: 34rem; }

.beyond-note {
  margin-top: clamp(1.5rem, 4vh, 3rem);
  border-top: 1px solid var(--line);
  padding-top: 1.2em;
  color: var(--dim);
  font-size: 0.95em;
  max-width: 46rem;
}

.beyond-note a { color: var(--fg); }

.flow {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: clamp(0.82rem, 1.25vw, 1.1rem);
  line-height: 2.1;
  max-width: 58rem;
  margin: 1.4rem 0;
}

.flow span { color: var(--faint); padding: 0 0.3em; }

.quotes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.2rem, 3.5vh, 2.6rem) clamp(1.5rem, 4vw, 4rem);
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

.quotes blockquote { margin: 0; }
.quotes .case-link { margin-top: 0.9rem; font-size: 0.72rem; }

/* ------------------------------------------------------- case studies */

.case-link {
  display: inline-block;
  margin-top: 1.2rem;
  color: var(--fg);
  text-decoration: none;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  border-bottom: 1px solid var(--faint);
  padding-bottom: 0.35em;
  transition: border-color 0.2s, letter-spacing 0.2s;
}

.case-link:hover { border-color: var(--fg); letter-spacing: 0.3em; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(1rem, 2.5vw, 2.5rem) clamp(1rem, 3vw, 3rem);
  margin-top: clamp(1.5rem, 4vh, 3rem);
}

.stat { border-top: 1px solid var(--line); padding-top: 0.8em; }

.stat b {
  display: block;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2rem, 4.2vw, 4.2rem);
  line-height: 0.9;
  letter-spacing: -0.01em;
}

.stat b sup { font-size: 0.4em; letter-spacing: 0; }

.stat span {
  display: block;
  margin-top: 0.5em;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--dim);
}

.stat.ghost b { color: transparent; -webkit-text-stroke: 1.5px var(--fg); }

.kv { list-style: none; margin-top: 1.6rem; max-width: 46rem; }

.kv li {
  display: grid;
  grid-template-columns: clamp(7.5rem, 11vw, 10.5rem) 1fr;
  gap: 0.4em 1.5rem;
  border-top: 1px solid var(--line);
  padding: 0.75em 0;
}

.kv li:last-child { border-bottom: 1px solid var(--line); }

.kv li b {
  font-family: var(--display);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  padding-top: 0.25em;
}

.kv li span { color: var(--dim); font-size: 0.92em; line-height: 1.6; }

/* kv rows that drive a hover image (expertise pages) */
.kv li[data-person] { cursor: default; }

.kv li[data-person] b {
  padding: 0.25em 0.5em 0.2em;
  margin-left: -0.5em;
  transition: background 0.18s, color 0.18s;
  align-self: start;
}

.kv li[data-person]:hover b,
.kv li[data-person].is-active b { background: var(--fg); color: var(--bg); }

.err-code {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(8rem, 30vw, 26rem);
  line-height: 0.85;
  letter-spacing: -0.02em;
}

.err-code .outline { -webkit-text-stroke: 2px var(--fg); }

/* ------------------------------------------------------------- mobile */

@media (max-width: 860px) {
  .screen { padding-top: 4.5rem; }

  .topbar nav { display: none; }

  .split .text, .split.reverse .text { width: 100%; }
  .split.reverse { justify-content: flex-start; }

  /* shapes render behind text on mobile — dim them via canvas engine */
  .giant { font-size: clamp(2.6rem, 13vw, 5rem); white-space: normal; }
  .stack .giant { white-space: nowrap; }
  .hero .giant { font-size: clamp(2rem, 10.5vw, 4.5rem); }

  .cols3 { grid-template-columns: 1fr; gap: 1.2rem; }
  .cols2 { grid-template-columns: 1fr; gap: 1.4rem; }
  .quotes { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .kv li { grid-template-columns: 1fr; gap: 0.15em; }
  .roles { grid-template-columns: 1fr; }
  .roles.with-side { width: 100%; }
  .personas-screen .cols3 { margin-top: 1.5rem; }
  .hero-foot { flex-direction: column; align-items: flex-start; }

  .bleed-l { margin-left: -1.2rem; }
  .bleed-r { margin-right: -1.2rem; margin-left: 0; }
  .shift-r { transform: translateX(1.5rem); }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-hint { animation: none; }
}