/* ==========================================================================
   Relupo growth — swiss architectural
   White paper, single grotesque, solid rules, exposed structural grid,
   racing-green accent. No cream, no serif, no gold.
   ========================================================================== */

@font-face {
  font-family: "Instrument Sans";
  src: url("assets/fonts/InstrumentSans-var.woff2") format("woff2-variations"),
       url("assets/fonts/InstrumentSans-var.woff2") format("woff2");
  font-weight: 400 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #ffffff;
  --ink: #111111;
  --ink-lift: #1c1c1c;
  --gray: #3f3f3f;
  --gray-soft: #6b6b6b;
  /* Racing green. 9.9:1 on white — safe as text and accent. */
  --green: #1a3c2e;
  --line: rgba(17, 17, 17, 0.14);
  --line-strong: rgba(17, 17, 17, 0.6);
  --line-dark: rgba(255, 255, 255, 0.16);

  --sans: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --gut: clamp(1.5rem, 5vw, 4rem);
  --shell: 1200px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  counter-reset: sec;
}

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

a {
  color: inherit;
}

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

/* The shell carries the exposed structural grid: two continuous vertical
   lines framing the content column, drafting-table style. */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--gut);
  border-inline: 1px solid var(--line);
}

section {
  padding-block: clamp(4rem, 8.5vw, 7.5rem);
  border-top: 1px solid var(--line);
}

/* Numbered technical labels, replacing the old eyebrows. */
.eyebrow {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 1.75rem;
  font-variant-numeric: tabular-nums;
}

.eyebrow::before {
  counter-increment: sec;
  content: counter(sec, decimal-leading-zero) " / ";
}

h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.6rem);
  line-height: 1.06;
}

h2 {
  font-size: clamp(1.7rem, 3.3vw, 2.5rem);
  line-height: 1.1;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.3;
}

.lede {
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.65;
  color: var(--gray);
  max-width: 46ch;
  margin: 1.5rem 0 0;
}

p {
  margin: 0 0 1.15rem;
}

p:last-child {
  margin-bottom: 0;
}

/* ------------------------------------------------------------------ wordmark */

.wordmark {
  position: relative;
  display: inline-block;
  font-weight: 500;
  font-size: 1.3125rem;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
  padding-bottom: 0.42em;
  white-space: nowrap;
}

.wordmark__arc {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 0.34em;
  overflow: visible;
}

.wordmark__arc path {
  fill: none;
  stroke: var(--green);
  stroke-width: 1.35;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.wordmark--lg {
  font-size: clamp(1.75rem, 3.5vw, 2.375rem);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.9rem 1.6rem;
  border: 1px solid var(--green);
  background: var(--green);
  color: var(--paper);
  text-decoration: none;
  border-radius: 0;
  cursor: pointer;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn:hover {
  background: var(--ink-lift);
  border-color: var(--ink-lift);
  color: #fff;
}

.btn--sm {
  padding: 0.6rem 1.15rem;
  font-size: 0.8125rem;
}

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

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

.textlink {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9375rem;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
  padding-bottom: 2px;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.textlink:hover {
  color: var(--green);
}

.textlink span {
  transition: transform 0.18s ease;
}

.textlink:hover span {
  transform: translateX(3px);
}

/* --------------------------------------------------------------------- nav */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--line-strong);
}

.nav.is-stuck {
  border-bottom-color: var(--line-strong);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  height: 72px;
  border-inline: 1px solid var(--line);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin-left: auto;
}

.nav__links a {
  font-size: 0.875rem;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

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

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

.hero {
  border-top: none;
  padding-top: clamp(4rem, 8vw, 6.5rem);
  padding-bottom: clamp(4rem, 8vw, 6.5rem);
}

.hero h1 {
  max-width: 24ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--green);
}

.hero__lede {
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
}

.hero__trust {
  margin-top: clamp(3.5rem, 7vw, 5rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-strong);
  display: flex;
  align-items: baseline;
  gap: 1.5rem 2.5rem;
  flex-wrap: wrap;
}

.hero__trust p {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-soft);
}

.crmlist {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
}

.crmlist li {
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
}

/* --------------------------------------------------------------- dark block */

.dark {
  background: var(--ink);
  color: var(--paper);
  border-top: none;
}

.dark h2,
.dark h3 {
  color: var(--paper);
}

.dark .eyebrow {
  color: #7fb69e;
}

.dark p {
  color: rgba(255, 255, 255, 0.76);
}

.dark .lede {
  color: rgba(255, 255, 255, 0.76);
}

/* -------------------------------------------------------------------- leak */

.leak__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 7vw, 6rem);
  align-items: start;
  margin-top: 3rem;
}

.leak__body p {
  max-width: 48ch;
}

.leak__cite {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.64);
  border-left: 2px solid #7fb69e;
  padding-left: 1rem;
  margin-top: 2rem;
  max-width: 44ch;
}

.metrics {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-dark);
}

.metric {
  padding: 1.75rem 0;
  border-bottom: 1px solid var(--line-dark);
  display: grid;
  gap: 0.5rem;
}

.metric__value {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.metric__value small {
  font-size: 0.45em;
  color: #7fb69e;
  margin-left: 0.35rem;
  letter-spacing: 0.04em;
}

.metric__label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.5;
}

/* ------------------------------------------------------------------- split */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 3.5rem;
  border-top: 1px solid var(--line-strong);
}

.split__col {
  padding: 2.75rem clamp(1.5rem, 3vw, 3rem) 2.75rem 0;
  border-right: 1px solid var(--line);
}

.split__col + .split__col {
  padding-left: clamp(1.5rem, 3vw, 3rem);
  padding-right: 0;
  border-right: none;
}

.split__tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.9rem;
}

.split__col h3 {
  margin-bottom: 1.75rem;
}

.split ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.split li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.55;
}

.split li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 8px;
  height: 1px;
  background: var(--green);
}

.split__note {
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.45;
  color: var(--ink);
  max-width: 44ch;
}

/* ------------------------------------------------------------------- stack */

.stack__head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: end;
}

.stack__head .lede {
  margin-top: 0;
  max-width: 44ch;
}

.stack__list {
  list-style: none;
  margin: clamp(3rem, 6vw, 4.5rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.stack__list li {
  display: grid;
  grid-template-columns: 4rem 15rem 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: 1.85rem 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.2s ease;
}

.stack__list li:hover {
  background: rgba(26, 60, 46, 0.04);
}

.stack__n {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.stack__name {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
  color: var(--ink);
}

.stack__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--gray);
  max-width: 52ch;
}

/* -------------------------------------------------------------------- demo */

.demo {
  background: #f5f5f4;
}

.demo__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(3rem, 6vw, 5rem);
  align-items: start;
}

.chat {
  background: var(--ink);
  border-radius: 0;
  padding: 1.25rem;
  border: 1px solid var(--ink);
}

.chat__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.35rem 0.5rem 1rem;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: 1.25rem;
}

.chat__who {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
}

.chat__live {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: #7fb69e;
}

.chat__live::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #7fb69e;
}

.chat__log {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0 0.5rem;
}

.msg {
  max-width: 84%;
  padding: 0.7rem 0.95rem;
  border-radius: 0;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.msg--lead {
  justify-self: start;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.9);
}

.msg--ai {
  justify-self: end;
  background: var(--paper);
  color: var(--ink);
}

.msg__meta {
  display: block;
  font-size: 0.6875rem;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
  opacity: 0.55;
}

.chat__system {
  margin-top: 1.25rem;
  padding: 1rem 0.95rem 0.35rem;
  border-top: 1px solid var(--line-dark);
  display: grid;
  gap: 0.5rem;
}

.chat__system span {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.55);
  display: flex;
  gap: 0.6rem;
}

.chat__system span::before {
  content: "\2713";
  color: #7fb69e;
}

.demo__stats {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line-strong);
}

.demo__stat {
  display: grid;
  gap: 0.15rem;
}

.demo__stat b {
  font-weight: 600;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.demo__stat span {
  font-size: 0.875rem;
  color: var(--gray);
}

/* ---------------------------------------------------------------- integrate */

.integrate__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.crmgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line);
}

.crmgrid div {
  padding: 2.25rem 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 1.0625rem;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  transition: background 0.2s ease;
}

.crmgrid div:hover {
  background: rgba(26, 60, 46, 0.04);
}

/* ------------------------------------------------------------------ measure */

.measure {
  padding-block: clamp(4rem, 8vw, 6.5rem);
}

.measure__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}

.measure__first {
  margin-top: 0;
}

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

.faq__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: clamp(3rem, 6vw, 4.5rem) 0 0;
  border-top: 1px solid var(--line-strong);
}

.faq__item {
  padding: 2rem clamp(1.5rem, 3vw, 3rem) 2rem 0;
  border-bottom: 1px solid var(--line);
}

.faq__item:nth-child(even) {
  padding-right: 0;
  padding-left: clamp(1.5rem, 3vw, 3rem);
  border-left: 1px solid var(--line);
}

.faq__item dt {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 0.85rem;
}

.faq__item dd {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--gray);
  max-width: 52ch;
}

.faq__item dd a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px solid var(--green);
}

.faq__item dd a:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.leak__cite a {
  color: #7fb69e;
  text-decoration: none;
  border-bottom: 1px solid #7fb69e;
}

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

/* ---------------------------------------------------------------- founders */

.founders__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(3rem, 7vw, 6rem);
  align-items: start;
}

.founders__terms {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.founders__terms li {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line-dark);
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.72);
}

.founders__terms b {
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--paper);
  white-space: nowrap;
}

.founders__cta {
  margin-top: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.founders__cta p {
  margin: 0;
  font-size: 0.875rem;
  max-width: 26ch;
}

.seats {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 2rem;
}

.seats i {
  width: 34px;
  height: 2px;
  background: #7fb69e;
}

/* ------------------------------------------------------------------ footer */

.footer {
  padding-block: 4rem 3rem;
  border-top: 1px solid var(--line-strong);
}

.footer__inner {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer__meta {
  display: grid;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: var(--gray-soft);
  text-align: right;
}

.footer__meta a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
}

.footer__meta a:hover {
  color: var(--green);
  border-color: var(--green);
}

.footer__tag {
  margin-top: 0.9rem;
  font-size: 0.875rem;
  color: var(--gray);
  max-width: 30ch;
}

/* ------------------------------------------------------------------ motion */

/* Reveal only hides content when JS is confirmed running (html.js is set by an
   inline script in <head>). Without JS the page renders fully visible. */
.js .reveal {
  opacity: 0;
  transition: opacity 0.45s ease-out;
}

.js .reveal.is-in {
  opacity: 1;
}

.js .reveal[data-d="1"] { transition-delay: 0.05s; }
.js .reveal[data-d="2"] { transition-delay: 0.1s; }
.js .reveal[data-d="3"] { transition-delay: 0.15s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal,
  .btn,
  .textlink span {
    transition: none;
    opacity: 1;
    transform: none;
  }
}

/* -------------------------------------------------------------------- focus */

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

.dark :focus-visible,
.btn--onnavy:focus-visible {
  outline-color: #7fb69e;
}

.skip {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -120%);
  z-index: 60;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.25rem;
  font-size: 0.875rem;
  text-decoration: none;
  transition: transform 0.18s ease;
}

.skip:focus {
  transform: translate(-50%, 0);
}

/* ----------------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .leak__grid,
  .demo__grid,
  .integrate__grid,
  .measure__grid,
  .founders__grid,
  .stack__head,
  .faq__list {
    grid-template-columns: 1fr;
  }

  .faq__item,
  .faq__item:nth-child(even) {
    padding-inline: 0;
    border-left: none;
  }

  .stack__head .lede {
    margin-top: 1.5rem;
  }

  .stack__list li {
    grid-template-columns: 2.5rem 1fr;
    gap: 0.35rem 1rem;
    row-gap: 0.5rem;
  }

  .stack__n {
    grid-row: 1;
  }

  .stack__desc {
    grid-column: 2;
  }

  .split {
    grid-template-columns: 1fr;
  }

  .split__col {
    padding: 2.25rem 0;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .split__col + .split__col {
    padding-left: 0;
  }

  .nav__links a:not(.btn) {
    display: none;
  }

  .demo__grid .demo__intro {
    order: -1;
  }
}

@media (max-width: 560px) {
  body {
    font-size: 16px;
  }

  .shell,
  .nav__inner {
    border-inline: none;
  }

  .nav__inner {
    height: 64px;
  }

  .wordmark {
    font-size: 1.1875rem;
  }

  .hero__actions {
    gap: 1.25rem;
  }

  .btn {
    width: 100%;
  }

  .hero__actions .btn {
    width: auto;
  }

  .msg {
    max-width: 92%;
  }

  .footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer__meta {
    text-align: left;
  }

  .founders__terms li {
    flex-direction: column;
    gap: 0.25rem;
  }
}