/* ── shared.css ── base tokens, resets, nav, layout, hero, section, footer ── */

:root {
  --bg: #ffffff;
  --fg: #050505;
  --muted: #6f6f6f;
  --accent: #1f7a4d;
  --line: rgba(5, 5, 5, 0.16);
  --line-strong: rgba(5, 5, 5, 0.28);
  --surface: rgba(255, 255, 255, 0.76);
  --surface-soft: #fafafa;
  --paper: #fbfbfb;
  --paper-muted: #f3f3f3;
  --radius: 22px;
  --shadow: 0 24px 60px rgba(5, 5, 5, 0.08);
  --content-width: 1180px;
  --nav-pad: clamp(1.25rem, 2vw, 2rem);
  --font-sans: "Rethink Sans", "Segoe UI", sans-serif;
  --font-display: "Rethink Sans", "Segoe UI", sans-serif;
  --font-mono: "DM Mono", ui-monospace, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(5, 5, 5, 0.03), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f7f7f7 100%);
  color: var(--fg);
  font-family: var(--font-sans);
  text-rendering: optimizeLegibility;
}

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

/* ── Nav ── */

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--nav-pad);
  mix-blend-mode: multiply;
}

.nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0));
  z-index: -1;
  pointer-events: none;
}

.nav__brand,
.nav__link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.78rem;
  font-weight: 650;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  color: var(--fg);
}

.brand-mark__hash {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.14em;
  line-height: 1;
}

.brand-mark__block {
  width: 0.78rem;
  height: 0.78rem;
  background: currentColor;
}

.brand-text {
  letter-spacing: 0.1em;
}

.nav__links {
  display: flex;
  gap: 1.5rem;
}

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

.nav__link:hover,
.nav__link:focus-visible,
.footer a:hover,
.footer a:focus-visible {
  color: var(--fg);
}

/* ── Page layout ── */

.page {
  width: min(calc(100% - 2rem), var(--content-width));
  margin: 0 auto;
  padding: 6rem 0 2.5rem;
}

/* ── Hero ── */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(2.5rem, 5vw, 5.5rem);
  align-items: start;
  min-height: calc(100vh - 10rem);
  padding: 2rem 0 4rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 7rem);
  line-height: 0.94;
  letter-spacing: -0.02em;
}

.hero__lead {
  max-width: 36rem;
  margin: 1.25rem 0 0;
  font-size: clamp(1.08rem, 2vw, 1.4rem);
  line-height: 1.55;
  color: var(--muted);
}

.hero__summary {
  display: grid;
  gap: 1rem;
  max-width: 32rem;
  margin-top: 2rem;
  font-size: 1rem;
  line-height: 1.72;
}

/* ── Hero panel ── */

.hero__panel {
  display: grid;
  gap: 1rem;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  background: var(--surface);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.quote {
  margin: 0;
  padding: 1.1rem 1.2rem;
  border-left: 2px solid var(--fg);
  background: rgba(255, 255, 255, 0.68);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.5;
}

.panel-grid {
  display: grid;
  gap: 0.9rem;
}

.panel-grid__row {
  display: grid;
  grid-template-columns: minmax(7rem, 10rem) 1fr;
  gap: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}

.panel-grid__row:first-child {
  padding-top: 0;
  border-top: 0;
}

.panel-grid dt {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-grid dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
}

/* ── Section ── */

.section {
  display: grid;
  grid-template-columns: minmax(0, 0.34fr) minmax(0, 0.66fr);
  gap: clamp(2rem, 5vw, 5rem);
  padding: 4rem 0;
  border-top: 1px solid var(--line);
}

.section--feature {
  grid-template-columns: 1fr;
  gap: 1.35rem;
}

.section__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.section__body {
  max-width: 48rem;
}

.section__body--wide {
  max-width: none;
}

.section h2 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.95rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.section p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
}

.section__body > * + * {
  margin-top: 1.2rem;
}

/* ── Footer ── */

.footer {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  padding: 2rem 0 0.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.footer__social {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.footer__social-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.footer__icon {
  width: 1rem;
  height: 1rem;
}

.footer__credit {
  margin: 0;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.96rem;
  letter-spacing: normal;
  line-height: 1.5;
  text-transform: none;
}

/* ── Media queries ── */

@media (max-width: 980px) {
  .hero,
  .section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .page {
    width: min(calc(100% - 1.25rem), var(--content-width));
    padding-top: 5rem;
  }

  .nav {
    padding: 1rem 0.625rem;
  }

  .nav__brand,
  .nav__link {
    font-size: 0.78rem;
  }

  .nav__links {
    gap: 1rem;
  }

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

  .footer {
    flex-wrap: wrap;
  }
}