:root {
  --bg: #071018;
  --bg-soft: #0b1620;
  --surface: #0d1a25;
  --surface-raised: #112231;
  --ink: #f3f7f8;
  --muted: #9aabb7;
  --line: rgba(166, 194, 207, 0.16);
  --accent: #56d4d4;
  --accent-soft: rgba(86, 212, 212, 0.12);
  --max: 1180px;
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 8%, rgba(31, 109, 122, 0.2), transparent 31rem),
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    var(--bg);
  background-size: auto, 46px 46px, 46px 46px, auto;
  color: var(--ink);
  font-family: Inter, Aptos, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 10;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 700;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(calc(100% - 3rem), var(--max));
  margin: 0 auto;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  background: rgba(7, 16, 24, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  width: fit-content;
  text-decoration: none;
  font-weight: 750;
  letter-spacing: -0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.15rem;
  aspect-ratio: 1;
  border: 1px solid rgba(86, 212, 212, 0.5);
  border-radius: 50%;
  color: var(--accent);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

nav {
  display: flex;
  gap: 2rem;
}

nav a,
.header-link {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
  transition: color 160ms ease;
}

nav a:hover,
nav a:focus-visible,
.header-link:hover,
.header-link:focus-visible {
  color: var(--accent);
}

.header-link {
  justify-self: end;
}

main,
footer {
  width: min(calc(100% - 3rem), var(--max));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(20rem, 0.68fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
  min-height: calc(100vh - 5rem);
  padding: 6rem 0;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero .eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.hero .eyebrow span {
  width: 1.8rem;
  height: 1px;
  background: var(--accent);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 12ch;
  margin-bottom: 1.6rem;
  font-size: clamp(3.4rem, 7vw, 6.6rem);
  font-weight: 690;
}

h1 em {
  color: var(--accent);
  font-style: normal;
}

.hero-intro {
  max-width: 41rem;
  margin: 0;
  color: #c0cbd2;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.3rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.15rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.91rem;
  font-weight: 750;
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #041014;
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: rgba(86, 212, 212, 0.65);
  background: var(--accent-soft);
}

.capability-panel {
  position: relative;
  overflow: hidden;
  padding: 1.6rem 1.8rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(145deg, rgba(17, 34, 49, 0.9), rgba(8, 19, 28, 0.84));
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.28);
}

.capability-panel::after {
  content: "";
  position: absolute;
  width: 12rem;
  height: 12rem;
  right: -5rem;
  top: -5rem;
  border: 1px solid rgba(86, 212, 212, 0.22);
  border-radius: 50%;
  box-shadow: 0 0 0 2.5rem rgba(86, 212, 212, 0.025), 0 0 0 5rem rgba(86, 212, 212, 0.02);
}

.panel-label {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.capability-panel article {
  position: relative;
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 1rem;
  padding: 1.45rem 0;
  border-top: 1px solid var(--line);
}

.capability-panel .index {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid rgba(86, 212, 212, 0.4);
  border-radius: 50%;
  color: var(--accent);
  font-size: 0.65rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.capability-panel h2 {
  margin-bottom: 0.4rem;
  font-size: 1.18rem;
}

.capability-panel article p {
  margin: 0;
  color: var(--muted);
  font-size: 0.91rem;
  line-height: 1.55;
}

.section {
  padding: 7rem 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(12rem, 0.72fr) minmax(0, 1.28fr);
  gap: 3rem;
  align-items: end;
  margin-bottom: 3.5rem;
}

.section-heading .eyebrow {
  align-self: start;
}

.section-heading h2,
.principles h2,
.contact h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 3.8rem);
  font-weight: 650;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.focus-card {
  min-height: 22rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(11, 22, 32, 0.68);
  transition: background 180ms ease, transform 180ms ease;
}

.focus-card:hover {
  z-index: 1;
  background: var(--surface-raised);
  transform: translateY(-3px);
}

.card-number,
.note-meta {
  margin: 0 0 2.3rem;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.focus-card h3,
.notes-list h3 {
  margin-bottom: 1rem;
  font-size: 1.55rem;
}

.focus-card > p:not(.card-number) {
  max-width: 34rem;
  color: var(--muted);
}

.focus-card ul {
  display: grid;
  gap: 0.45rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  color: #c8d2d8;
  font-size: 0.93rem;
}

.focus-card li::before {
  content: "—";
  margin-right: 0.65rem;
  color: var(--accent);
}

.thinking .section-heading {
  align-items: start;
}

.thinking .section-heading > p:last-child {
  grid-column: 2;
  max-width: 34rem;
  margin: 0;
  color: var(--muted);
}

.notes-list {
  border-top: 1px solid var(--line);
}

.notes-list article {
  display: grid;
  grid-template-columns: 0.55fr 1fr 1.15fr;
  gap: 2.5rem;
  padding: 2.1rem 0;
  border-bottom: 1px solid var(--line);
}

.notes-list .note-meta {
  margin: 0;
}

.notes-list h3 {
  margin: 0;
}

.notes-list article > p:last-child {
  margin: 0;
  color: var(--muted);
}

.principles {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(3rem, 8vw, 7rem);
}

.principles-intro > p:last-child {
  max-width: 31rem;
  color: var(--muted);
}

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

.principles li {
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 1rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line);
}

.principles li > span {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 850;
}

.principles strong {
  font-size: 1.05rem;
}

.principles li p {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.contact {
  margin: 3rem 0 6rem;
  padding: clamp(2rem, 7vw, 5rem);
  border: 1px solid rgba(86, 212, 212, 0.28);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(31, 109, 122, 0.22), rgba(13, 26, 37, 0.88));
}

.contact h2 {
  max-width: 14ch;
}

.contact > p:not(.eyebrow) {
  max-width: 42rem;
  margin: 1.2rem 0 2rem;
  color: #c5d0d5;
  font-size: 1.05rem;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem 0 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.78rem;
}

footer p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 820px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  nav {
    display: none;
  }

  .hero,
  .principles {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 5rem 0;
  }

  h1 {
    font-size: clamp(3.1rem, 14vw, 5rem);
  }

  .capability-panel {
    max-width: 38rem;
  }

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

  .thinking .section-heading > p:last-child {
    grid-column: auto;
  }

  .notes-list article {
    grid-template-columns: 1fr;
    gap: 0.8rem;
  }

  .notes-list .note-meta {
    margin-bottom: 0.25rem;
  }
}

@media (max-width: 620px) {
  .site-header,
  main,
  footer {
    width: min(calc(100% - 2rem), var(--max));
  }

  .brand > span:last-child {
    display: none;
  }

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

  .focus-card {
    min-height: 0;
  }

  .section {
    padding: 5rem 0;
  }

  footer {
    flex-direction: column;
    gap: 0.4rem;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}