/* Nonlinear Labs — instrumentation design system
   Palette, type scale, and layout primitives. Data-ink discipline:
   --signal is reserved for plotted data and never used as decoration. */

:root {
  --ink: #0b0d0f;
  --graphite: #14181c;
  --rule: #232a31;
  --paper: #f2f3f4;
  --dim: #7c8794;
  --signal: #4de0c0;

  --display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --body: "Inter Tight", ui-sans-serif, system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --gutter: 72px;
  --measure: 60ch;
  --pad: clamp(20px, 5vw, 64px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

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

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

/* ---- Layout shell -------------------------------------------------- */
/* A hairline gutter runs the full page height, carrying section indices
   the way a y-axis carries ticks. */

.shell {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 var(--pad);
}

.band {
  position: relative;
  border-top: 1px solid var(--rule);
  padding: clamp(64px, 9vw, 128px) 0;
}

.band__index {
  position: absolute;
  top: clamp(64px, 9vw, 128px);
  left: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
}

.band__body {
  padding-left: 0;
}

@media (min-width: 900px) {
  .band__body {
    padding-left: var(--gutter);
  }
}

/* ---- Type ---------------------------------------------------------- */

h1,
h2,
h3 {
  font-family: var(--display);
  font-weight: 500;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.6rem, 7.2vw, 5.4rem);
  line-height: 0.98;
}

h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  line-height: 1.08;
}

h3 {
  font-size: 1.12rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0;
  max-width: var(--measure);
  text-wrap: pretty;
}

.lede {
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
  color: #c3c9cf;
  line-height: 1.55;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--dim);
  margin: 0 0 22px;
}

.muted {
  color: var(--dim);
}

/* ---- Nav ----------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 62px;
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--display);
  font-size: 15px;
  letter-spacing: -0.02em;
}

.wordmark svg {
  display: block;
  overflow: visible;
}

.nav__links {
  display: none;
  gap: 30px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

.nav__links a {
  transition: color 0.18s ease;
}

.nav__links a:hover {
  color: var(--paper);
}

@media (min-width: 780px) {
  .nav__links {
    display: flex;
  }
}

/* ---- Hero ---------------------------------------------------------- */

.hero {
  padding: clamp(56px, 9vw, 112px) 0 clamp(40px, 6vw, 72px);
}

.hero h1 {
  margin-bottom: 26px;
}

.hero__lede {
  margin-bottom: 34px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* The plot is the page's signature: a live training run, drawn to real
   axes. It is the only element allowed to use --signal. */

.plot {
  margin-top: clamp(44px, 6vw, 76px);
  border: 1px solid var(--rule);
  background: linear-gradient(180deg, var(--graphite), var(--ink));
  border-radius: 3px;
  overflow: hidden;
}

.plot__head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 18px;
  border-bottom: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--dim);
}

.plot__readout {
  display: flex;
  gap: 22px;
}

.plot__readout b {
  font-weight: 500;
  color: var(--paper);
}

.plot__canvas {
  display: block;
  width: 100%;
  height: auto;
}

/* ---- Buttons ------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 11px 19px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.btn:hover {
  border-color: #46525d;
  background: var(--graphite);
}

.btn--primary {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

.btn--primary:hover {
  background: #fff;
  border-color: #fff;
}

/* ---- Research grid ------------------------------------------------- */

.grid {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 44px;
}

@media (min-width: 720px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.cell {
  background: var(--ink);
  padding: clamp(24px, 3vw, 34px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background 0.2s ease;
}

.cell:hover {
  background: var(--graphite);
}

.cell__tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}

.cell p {
  font-size: 15px;
  color: #b3bac1;
  line-height: 1.55;
}

/* ---- Publications -------------------------------------------------- */

.pubs {
  margin-top: 40px;
  border-top: 1px solid var(--rule);
}

.pub {
  display: grid;
  gap: 6px 28px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  transition: padding-left 0.2s ease;
}

.pub:hover {
  padding-left: 10px;
}

@media (min-width: 820px) {
  .pub {
    grid-template-columns: 96px 1fr 132px;
  }
}

.pub__date,
.pub__venue {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dim);
  text-transform: uppercase;
}

.pub__title {
  font-family: var(--display);
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

@media (min-width: 820px) {
  .pub__venue {
    text-align: right;
  }
}

/* ---- Approach / numbered sequence ---------------------------------- */
/* Numbering is used here only because these steps genuinely run in order. */

.steps {
  margin-top: 44px;
  display: grid;
  gap: 28px;
}

@media (min-width: 860px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
  }
}

.step {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
}

.step__n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.step p {
  font-size: 14.5px;
  color: #b3bac1;
  line-height: 1.55;
}

/* ---- Figures / stats ----------------------------------------------- */

.figures {
  display: grid;
  gap: 26px;
  margin-top: 40px;
}

@media (min-width: 720px) {
  .figures {
    grid-template-columns: repeat(4, 1fr);
  }
}

.figure__n {
  font-family: var(--display);
  font-size: clamp(1.9rem, 3.4vw, 2.6rem);
  letter-spacing: -0.03em;
  line-height: 1;
}

.figure__label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--dim);
  margin-top: 9px;
}

/* ---- Careers ------------------------------------------------------- */

.roles {
  margin-top: 38px;
  border-top: 1px solid var(--rule);
}

.role {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: baseline;
  justify-content: space-between;
  padding: 19px 0;
  border-bottom: 1px solid var(--rule);
  transition: padding-left 0.2s ease;
}

.role:hover {
  padding-left: 10px;
}

.role__title {
  font-family: var(--display);
  font-size: 1.02rem;
}

.role__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dim);
}

/* ---- Footer -------------------------------------------------------- */

.footer {
  border-top: 1px solid var(--rule);
  padding: 52px 0 64px;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  justify-content: space-between;
  align-items: flex-start;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 26px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--dim);
}

.footer__links a:hover {
  color: var(--paper);
}

.footer__legal {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: #59636e;
}

/* ---- Entrance ------------------------------------------------------ */

.rise {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.7s cubic-bezier(0.16, 0.84, 0.44, 1) forwards;
}

.rise--2 { animation-delay: 0.08s; }
.rise--3 { animation-delay: 0.16s; }
.rise--4 { animation-delay: 0.24s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .rise {
    opacity: 1;
    transform: none;
    animation: none;
  }
}