/* Persystence marketing site — "the patient instrument"
   Palette: deep petrol lacquer + cool paper + a warm brass ignition accent.
   Type: Fraunces (display/editorial) + Hanken Grotesk (UI/body). */

:root {
  --ink:        #0E2126;  /* deep petrol lacquer */
  --ink-2:      #163036;  /* raised petrol panel */
  --paper:      #ECEFEC;  /* cool off-white (deliberately not warm cream) */
  --paper-2:    #E1E7E3;  /* slightly deeper paper for a quiet alternate band */
  --brass:      #C4893C;  /* ignition / detected-signal accent */
  --brass-lit:  #E6A94D;  /* the lit edge of the signal */

  --on-paper:      #14262B;  /* body text on paper */
  --on-paper-mute: #55635F;  /* secondary text on paper */
  --on-ink:        #E8EDEA;  /* body text on ink */
  --on-ink-mute:   #9DB3B0;  /* secondary text on ink */

  --line-paper: rgba(20, 38, 43, 0.14);
  --line-ink:   rgba(232, 237, 234, 0.16);

  --measure: 62ch;
  --pad-x: clamp(20px, 6vw, 96px);

  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-ui: "Hanken Grotesk", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

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

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

h1, h2, h3, h4 { margin: 0; font-weight: 500; }
p { margin: 0; }
a { color: inherit; }

.display {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.015em;
}

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--on-ink);
  padding: 10px 16px; border-radius: 0 0 8px 0; z-index: 20;
}
.skip:focus { left: 0; }

/* ---- buttons + links -------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1;
  padding: 14px 22px;
  border-radius: 7px;
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: background-color .18s ease, border-color .18s ease, color .18s ease, transform .18s ease;
}
.btn:active { transform: translateY(1px); }

.btn--brass {
  background: var(--brass);
  color: #1B1206;
  border-color: var(--brass);
}
.btn--brass:hover { background: var(--brass-lit); border-color: var(--brass-lit); }

.btn--ghost {
  background: transparent;
  color: var(--on-paper);
  border-color: var(--line-paper);
}
.btn--ghost:hover { border-color: var(--on-paper); }

.btn--ghost-light {
  color: var(--on-ink);
  border-color: var(--line-ink);
}
.btn--ghost-light:hover { border-color: var(--on-ink); }

.link-quiet {
  text-decoration: none;
  font-weight: 500;
  color: var(--on-paper);
  padding: 8px 4px;
  border-bottom: 1.5px solid transparent;
}
.link-quiet:hover { border-bottom-color: var(--brass); }

/* ---- nav -------------------------------------------------------------- */
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 20px var(--pad-x);
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line-paper);
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--on-paper);
}
.nav__links {
  display: flex;
  gap: 26px;
  margin-left: 8px;
}
.nav__links a {
  text-decoration: none;
  font-weight: 500;
  font-size: 0.96rem;
  color: var(--on-paper-mute);
  padding: 6px 0;
  border-bottom: 1.5px solid transparent;
}
.nav__links a:hover { color: var(--on-paper); border-bottom-color: var(--brass); }
.nav__actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
}

/* ---- hero ------------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(24px, 5vw, 72px);
  padding: clamp(48px, 8vw, 104px) var(--pad-x) clamp(56px, 9vw, 120px);
}
.hero__copy { max-width: 34rem; }
.hero .display {
  font-size: clamp(2.5rem, 5.6vw, 4.4rem);
}
.lede {
  margin-top: 26px;
  font-size: clamp(1.1rem, 1.6vw, 1.3rem);
  line-height: 1.5;
  color: var(--on-paper-mute);
  max-width: 40ch;
}
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}
.hero__note {
  margin-top: 26px;
  font-size: 0.92rem;
  color: var(--on-paper-mute);
}

/* the signal visual sits in a deep petrol panel — the one dark note on a light hero */
.hero__visual {
  background: radial-gradient(120% 120% at 70% 40%, var(--ink-2), var(--ink) 70%);
  border-radius: 16px;
  padding: clamp(18px, 3vw, 34px);
  border: 1px solid var(--line-ink);
}
.signal { display: block; width: 100%; height: auto; }

/* one orchestrated moment: the detected signal draws itself in, once */
.signal__peak {
  stroke-dasharray: 460;
  stroke-dashoffset: 460;
  animation: draw-peak 1.5s cubic-bezier(.2,.7,.2,1) .25s forwards;
}
.signal__mark {
  opacity: 0;
  transform-origin: 312px 100px;
  animation: pop-mark .5s ease-out 1.55s forwards;
}
@keyframes draw-peak { to { stroke-dashoffset: 0; } }
@keyframes pop-mark {
  0%   { opacity: 0; transform: scale(0.2); }
  70%  { opacity: 1; transform: scale(1.25); }
  100% { opacity: 1; transform: scale(1); }
}

/* ---- generic band ----------------------------------------------------- */
.band {
  padding: clamp(56px, 8vw, 108px) var(--pad-x);
}
.band--paper  { background: var(--paper); }
.band--paper2 { background: var(--paper-2); }
.band--ink    { background: var(--ink); color: var(--on-ink); }

.section-h {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  line-height: 1.1;
  letter-spacing: -0.015em;
  max-width: 20ch;
  margin-bottom: clamp(32px, 4vw, 52px);
}
.section-h--light { color: var(--on-ink); }

/* ---- value props ------------------------------------------------------ */
.props {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 48px);
}
.prop {
  border-top: 2px solid var(--brass);
  padding-top: 20px;
}
.prop h3 {
  font-size: 1.22rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.prop p { color: var(--on-paper-mute); }

/* ---- how it works (numbered sequence) -------------------------------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(28px, 4vw, 56px) clamp(40px, 6vw, 88px);
  counter-reset: step;
}
.step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 22px;
  align-items: start;
  padding-top: 24px;
  border-top: 1px solid var(--line-ink);
}
.step__n {
  font-family: var(--font-display);
  font-size: 2.2rem;
  line-height: 1;
  color: var(--brass-lit);
  font-weight: 400;
  font-variant-numeric: lining-nums;
}
.step__body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
}
.step__body p { color: var(--on-ink-mute); max-width: 40ch; }

/* ---- industries ------------------------------------------------------- */
.industries__intro {
  max-width: 52ch;
  margin: -28px 0 clamp(32px, 4vw, 52px);
  color: var(--on-paper-mute);
  font-size: 1.08rem;
}
.industries {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.5vw, 36px);
}
.industry {
  border: 1px solid var(--line-paper);
  border-radius: 12px;
  padding: clamp(22px, 2.6vw, 32px);
  background: var(--paper);
}
.industry--live {
  border-color: color-mix(in srgb, var(--brass) 55%, var(--line-paper));
  background: color-mix(in srgb, var(--brass) 7%, var(--paper));
}
.industry__tag {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--brass);
  margin-bottom: 14px;
}
.industry__tag--next { color: var(--on-paper-mute); }
.industry h3 {
  font-size: 1.24rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.industry p { color: var(--on-paper-mute); }

/* ---- positioning / wedge --------------------------------------------- */
.positioning { text-align: left; }
.positioning__kicker {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--brass);
  margin-bottom: 18px;
}
.positioning__h {
  font-size: clamp(2.4rem, 5vw, 4rem);
  margin-bottom: 26px;
}
.positioning__p {
  font-size: clamp(1.1rem, 1.5vw, 1.28rem);
  line-height: 1.55;
  color: var(--on-paper-mute);
  max-width: 54ch;
}

/* ---- capabilities ----------------------------------------------------- */
.caps {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  background: var(--line-paper);
  border: 1px solid var(--line-paper);
  border-radius: 12px;
  overflow: hidden;
}
.cap {
  background: var(--paper-2);
  padding: clamp(22px, 3vw, 34px);
}
.cap dt {
  font-weight: 600;
  font-size: 1.12rem;
  margin-bottom: 10px;
}
.cap dd { margin: 0; color: var(--on-paper-mute); max-width: 44ch; }

/* ---- final cta -------------------------------------------------------- */
.cta-band { text-align: center; }
.cta-band__h {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  color: var(--on-ink);
  max-width: 18ch;
  margin: 0 auto;
}
.cta-band__p {
  margin: 24px auto 0;
  max-width: 52ch;
  color: var(--on-ink-mute);
  font-size: 1.1rem;
}
.cta-band__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

/* ---- footer ----------------------------------------------------------- */
.footer {
  background: var(--ink-2);
  color: var(--on-ink);
  padding: clamp(48px, 6vw, 72px) var(--pad-x) 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px 32px;
}
@media (min-width: 981px) {
  .footer { grid-template-columns: 1.8fr repeat(4, 1fr); }
}
.footer .wordmark { color: var(--on-ink); }
.footer__brand p {
  margin-top: 14px;
  color: var(--on-ink-mute);
  max-width: 28ch;
  font-size: 0.96rem;
}
.footer__col { display: flex; flex-direction: column; gap: 12px; }
.footer__col h4 {
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: var(--on-ink-mute);
  font-weight: 600;
  margin-bottom: 4px;
}
.footer__col a {
  text-decoration: none;
  color: var(--on-ink);
  font-size: 0.96rem;
  width: max-content;
  border-bottom: 1.5px solid transparent;
}
.footer__col a:hover { border-bottom-color: var(--brass); }
.footer__legal {
  grid-column: 1 / -1;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line-ink);
  color: var(--on-ink-mute);
  font-size: 0.88rem;
}

/* ---- responsive ------------------------------------------------------- */
@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .hero__visual { order: -1; }
  .nav__links { display: none; }
  .props { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .caps { grid-template-columns: 1fr; }
  .industries { grid-template-columns: 1fr; }
  .footer { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer { grid-template-columns: 1fr; }
  .nav { gap: 14px; }
}

/* ---- reduced motion --------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .signal__peak { animation: none; stroke-dashoffset: 0; }
  .signal__mark { animation: none; opacity: 1; }
  .btn { transition: none; }
}