:root {
  --bg: #0b0d10;
  --bg-elev: #12161c;
  --bg-card: #161b22;
  --line: #2a323c;
  --text: #e7ebe8;
  --muted: #9aa3ab;
  --accent: #5ec4d4;
  --accent-dim: #1c3d44;
  --accent-ink: #0b0d10;
  --focus: #7fd6e2;
  --danger: #e07a84;
  --ok: #7dcea0;
  --nav-h: 4.25rem;
  --wrap: 70rem;
  --font: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

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

html {
  color-scheme: dark;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 0.75rem);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(94, 196, 212, 0.04), transparent 18rem),
    var(--bg);
  background-attachment: fixed;
}

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

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--focus);
}

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

.skip {
  position: absolute;
  left: 0.75rem;
  top: -4rem;
  z-index: 80;
  padding: 0.5rem 0.85rem;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

.skip:focus {
  top: 0.75rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  width: min(calc(100% - 2.5rem), var(--wrap));
  margin-inline: auto;
}

.kicker {
  margin: 0 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2.15rem, 5vw, 3.65rem);
  max-width: 14ch;
}

h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.35rem);
  max-width: 22ch;
}

h3 {
  font-size: 1.12rem;
  letter-spacing: -0.02em;
}

.lede {
  margin: 1rem 0 0;
  max-width: 42rem;
  color: var(--muted);
  font-size: 1.08rem;
}

.section {
  padding: 5.25rem 0;
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  gap: 0.85rem;
  margin-bottom: 2.4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--nav-h);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 13, 16, 0.88);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.03em;
}

.brand img {
  width: 1.85rem;
  height: 1.85rem;
}

.brand span {
  font-size: 0.98rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.nav-links a.btn-solid,
.nav-links a.btn-solid:hover,
.nav-links a.btn-solid:focus-visible {
  color: var(--accent-ink);
  text-decoration: none;
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  background: var(--bg-elev);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle-bars {
  position: relative;
  display: block;
  width: 1.05rem;
  height: 1.5px;
  background: currentColor;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  position: absolute;
  left: 0;
  width: 1.05rem;
  height: 1.5px;
  background: currentColor;
  content: "";
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0.55rem 1.05rem;
  border: 1px solid transparent;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
}

.btn-solid {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-solid:hover {
  color: var(--accent-ink);
  filter: brightness(1.06);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(18rem, 0.9fr);
  gap: 3rem;
  align-items: center;
  padding: 4.2rem 0 5rem;
}

.hero-copy p.lede {
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.75rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin: 2.1rem 0 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.hero-meta strong {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--text);
  font-weight: 500;
}

.hero-frame {
  border: 1px solid var(--line);
  background: var(--bg-elev);
  box-shadow: 0 0 0 1px rgba(94, 196, 212, 0.08);
}

.hero-frame figcaption {
  margin: 0;
  padding: 0.55rem 0.8rem;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.grid-2,
.grid-3,
.grid-audience,
.steps,
.industries {
  display: grid;
  gap: 1rem;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.steps {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.industries {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.card,
.step,
.industry {
  padding: 1.3rem 1.25rem 1.4rem;
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.card {
  border-left: 2px solid var(--accent);
}

.card p,
.step p,
.industry p {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.step-num,
.industry-role {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.industry {
  grid-column: span 2;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.module-card {
  padding: 1.45rem 1.35rem 1.5rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  background: var(--bg-card);
}

.module-card .kicker {
  margin-bottom: 0.55rem;
}

.module-card h3 {
  font-size: 1.28rem;
}

.module-card p {
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.module-card .btn {
  margin-top: 1.15rem;
}

.grid-follow {
  margin-top: 1rem;
}

.heritage-layout {
  display: grid;
  grid-template-columns: minmax(16rem, 0.85fr) minmax(0, 1.15fr);
  gap: 1.5rem;
  align-items: start;
}

.heritage-cases {
  display: grid;
  gap: 1rem;
}

.grid-audience {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.persona {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 1.5rem;
  align-items: start;
}

.persona-points {
  margin: 1.1rem 0 0;
  padding: 0;
  list-style: none;
}

.persona-points li {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 0.8rem;
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}

.persona-points strong {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.persona-points span {
  color: var(--muted);
}

.code {
  margin: 0;
  overflow: auto;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  background: #0e1218;
  color: #d5ecef;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
}

.code .key {
  color: var(--accent);
}

.code .str {
  color: #c9b27c;
}

.code .cmt {
  color: #6b747c;
}

.access {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(20rem, 1fr);
  gap: 2.4rem;
  align-items: start;
}

.form {
  display: grid;
  gap: 0.85rem;
  padding: 1.35rem;
  border: 1px solid var(--line);
  background: var(--bg-elev);
}

.field {
  display: grid;
  gap: 0.35rem;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  padding: 0.65rem 0.7rem;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 0.98rem;
}

input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
  border-color: var(--accent);
}

textarea {
  min-height: 6.5rem;
  resize: vertical;
}

.form-status {
  min-height: 1.4rem;
  margin: 0;
  font-size: 0.92rem;
}

.form-status.ok {
  color: var(--ok);
}

.form-status.err {
  color: var(--danger);
}

.fine {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.site-footer {
  padding: 1.4rem 0 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem 1.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-narrow {
  max-width: 42rem;
  padding: 5rem 0 6rem;
}

.page-narrow p {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .grid-audience {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 960px) {
  .hero,
  .persona,
  .access,
  .steps,
  .grid-2,
  .grid-3,
  .grid-audience,
  .heritage-layout {
    grid-template-columns: 1fr;
  }

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

  .industry {
    grid-column: auto;
  }

  h1 {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .wrap {
    width: min(calc(100% - 1.5rem), var(--wrap));
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: var(--nav-h);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 1.25rem 1rem;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 13, 16, 0.97);
  }

  .nav.is-open .nav-links {
    display: flex;
  }

  .nav-links a,
  .nav-links .btn {
    width: 100%;
    justify-content: flex-start;
    padding: 0.7rem 0;
  }

  .nav-links a.btn-solid {
    justify-content: center;
    padding: 0.55rem 1.05rem;
    margin-top: 0.35rem;
  }

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

  .hero {
    padding-top: 2.4rem;
  }

  .section {
    padding: 3.4rem 0;
  }

  .persona-points li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}