:root {
  --ink: #191919;
  --ink-soft: rgba(25, 25, 25, 0.72);
  --gray-900: #111827;
  --gray-600: #4b5563;
  --gray-200: #e5e7eb;
  --gray-100: #f5f5f4;
  --paper: #faf9f6;
  --white: #ffffff;
  --accent: #b98922;
  --accent-soft: rgba(185, 137, 34, 0.1);
  --serif: "Source Serif 4", "Georgia", "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--serif);
  background-color: var(--paper);
  color: var(--ink);
  line-height: 1.72;
}

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: clamp(3.5rem, 8vw, 5.5rem) 1.6rem clamp(4rem, 10vw, 6.4rem);
  display: grid;
  gap: clamp(3rem, 6vw, 4.6rem);
}

.hero {
  display: grid;
  gap: 1.4rem;
  background-color: var(--white);
  padding: clamp(2.8rem, 7vw, 4rem);
  border: 1px solid var(--gray-200);
  border-radius: 18px;
  position: relative;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(17, 24, 39, 0.08);
  border-radius: 12px;
  pointer-events: none;
}

.hero__eyebrow {
  margin: 0;
  padding-bottom: 0.4rem;
  font-family: var(--sans);
  font-size: 0.68rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.55);
}

.hero__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3rem, 6.5vw, 4.6rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.hero__subtitle {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(1.18rem, 2.5vw, 1.5rem);
  color: var(--ink-soft);
}

.hero__cta {
  margin-top: 0.6rem;
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--sans);
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--ink);
  text-decoration: none;
  padding: 0.85rem 1.8rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  transition: background-color 180ms ease, color 180ms ease;
}

.hero__cta::after {
  content: "→";
  font-size: 0.95rem;
}

.hero__cta:hover,
.hero__cta:focus-visible {
  background-color: var(--ink);
  color: var(--white);
}

.hero__cta:focus-visible {
  outline: 3px solid rgba(25, 25, 25, 0.25);
  outline-offset: 4px;
}

main {
  display: grid;
  gap: clamp(2.6rem, 5vw, 3.8rem);
}

.section {
  display: grid;
  gap: 1.2rem;
  background-color: var(--white);
  padding: clamp(2.4rem, 5vw, 3.2rem);
  border-radius: 18px;
  border: 1px solid var(--gray-200);
  position: relative;
}

.section::after {
  content: "";
  position: absolute;
  inset: 22px;
  border-top: 1px solid rgba(17, 24, 39, 0.08);
  display: block;
  pointer-events: none;
}

.section__title {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2rem, 3vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.015em;
}

.section__body {
  margin: 0;
  font-size: 1.05rem;
  max-width: 68ch;
  color: rgba(25, 25, 25, 0.78);
}

.section__header {
  display: grid;
  gap: 0.4rem;
}

.section__caption {
  margin: 0;
  font-family: var(--sans);
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.48);
}

.section--columns {
  gap: 1.8rem;
}

.columns {
  display: grid;
  gap: 1.6rem 2.2rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.column-card {
  display: grid;
  gap: 0.6rem;
  padding: 1.6rem 1.4rem;
  border-left: 3px solid var(--ink);
  background-color: var(--white);
  box-shadow: inset 0 0 0 1px var(--gray-200);
  border-radius: 8px;
}

.column-card__icon {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.45);
}

.column-card__title {
  margin: 0;
  font-size: 1.28rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.column-card__body {
  margin: 0;
  color: rgba(25, 25, 25, 0.7);
}

.section--proof {
  gap: 1.6rem;
}

.proof-card {
  display: grid;
  gap: 1.1rem;
}

.proof-card__title {
  margin: 0;
  font-size: clamp(1.6rem, 2.8vw, 2.1rem);
  font-weight: 600;
}

.proof-card__body {
  margin: 0;
  color: rgba(25, 25, 25, 0.7);
  max-width: 62ch;
}

.proof-graph {
  display: grid;
  gap: 1.1rem;
  padding: 1.8rem;
  border-radius: 12px;
  background-color: var(--gray-100);
  border: 1px solid var(--gray-200);
}

.proof-graph__axes {
  display: flex;
  justify-content: space-between;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.45);
}

.proof-graph__bars {
  display: flex;
  align-items: flex-end;
  gap: 1.2rem;
  min-height: 200px;
}

.proof-graph__bar {
  flex: 1;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 1rem;
  font-family: var(--sans);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  font-weight: 600;
  color: rgba(17, 24, 39, 0.6);
  background: linear-gradient(180deg, rgba(17, 24, 39, 0.08), rgba(17, 24, 39, 0.16));
  border-radius: 80px 80px 12px 12px;
  position: relative;
}

.proof-graph__bar::after {
  content: "";
  position: absolute;
  inset: 12px 16px;
  border-radius: 60px 60px 10px 10px;
  background-color: var(--white);
  opacity: 0.35;
}

.proof-graph__bar--engagement {
  height: 58%;
}

.proof-graph__bar--trust {
  height: 92%;
  background: linear-gradient(180deg, var(--accent-soft), rgba(17, 24, 39, 0.12));
  color: var(--ink);
}

.proof-graph__caption {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(17, 24, 39, 0.58);
}

.section--invitation {
  text-align: center;
  align-items: center;
  gap: 1.6rem;
}

.section--invitation::after {
  border-color: rgba(17, 24, 39, 0.08);
}

.section__cta {
  margin-top: 0.4rem;
}

.footer {
  display: grid;
  gap: 0.6rem;
  justify-items: center;
  font-family: var(--sans);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(17, 24, 39, 0.55);
}

.footer__back {
  color: inherit;
  text-decoration: none;
}

.footer__back:hover,
.footer__back:focus-visible {
  text-decoration: underline;
}

.footer__back:focus-visible {
  outline: 2px solid rgba(17, 24, 39, 0.28);
  outline-offset: 3px;
}

@media (max-width: 720px) {
  .hero {
    padding: 2.4rem;
  }

  .section {
    padding: 2rem;
  }

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