:root {
  --ink: #17211d;
  --paper: #f3f0e9;
  --paper-deep: #e8e4da;
  --accent: #3b98ca;
  --accent-strong: #1676a8;
  --muted: #68716d;
  --line: rgba(23, 33, 29, 0.18);
  --contact-bg: #17211d;
  --contact-ink: #f3f0e9;
  --contact-muted: rgba(243, 240, 233, 0.65);
  --contact-line: rgba(243, 240, 233, 0.12);
  --contact-accent: #7bc9ef;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --ink: #edf4f6;
  --paper: #11191d;
  --paper-deep: #172327;
  --accent: #7bc9ef;
  --accent-strong: #a5dcf5;
  --muted: #a1b0b6;
  --line: rgba(237, 244, 246, 0.17);
  --contact-bg: #dcecf2;
  --contact-ink: #11191d;
  --contact-muted: rgba(17, 25, 29, 0.62);
  --contact-line: rgba(17, 25, 29, 0.13);
  --contact-accent: #1676a8;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  transition: color 220ms ease, background-color 220ms ease;
}

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

.skip-link {
  position: fixed;
  z-index: 20;
  top: 1rem;
  left: 1rem;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header,
main,
footer {
  width: min(100% - 3rem, 1280px);
  margin-inline: auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 100px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -0.08em;
}

.brand span {
  color: var(--accent);
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1.2rem, 3.5vw, 3.5rem);
  font-size: 0.82rem;
  font-weight: 650;
}

nav a,
.hero-links a {
  transition: color 180ms ease;
}

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

.theme-toggle {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  place-items: center;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
  font: inherit;
  transition: color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  color: var(--accent-strong);
  border-color: currentColor;
  transform: rotate(18deg);
}

.hero {
  min-height: calc(100vh - 100px);
  min-height: calc(100svh - 100px);
  padding: clamp(4rem, 10vh, 8rem) 0 3rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
}

h1,
h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  letter-spacing: -0.055em;
  line-height: 0.94;
}

h1 {
  max-width: 1080px;
  margin: 4rem 0;
  font-size: clamp(4rem, 9.3vw, 8.6rem);
}

h1 em,
h2 em {
  color: var(--accent);
  font-weight: 400;
}

.hero-bottom {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
}

.hero-bottom > p {
  max-width: 620px;
  margin: 0;
  font-size: clamp(1rem, 1.5vw, 1.22rem);
  line-height: 1.65;
}

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

.hero-links {
  display: flex;
  gap: 1.7rem;
  font-size: 0.78rem;
  font-weight: 700;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stats article {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.4rem);
  padding: clamp(2rem, 5vw, 4.5rem) clamp(1.2rem, 3vw, 3rem);
}

.stats article:first-child {
  padding-left: 0;
}

.stats article + article {
  border-left: 1px solid var(--line);
}

.stats strong {
  font-family: var(--serif);
  font-size: clamp(3rem, 5vw, 5.2rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 1;
}

.stats span {
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 650;
  line-height: 1.5;
  text-transform: uppercase;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(140px, 0.75fr) 3fr;
  gap: 3rem;
  padding: clamp(6rem, 12vw, 11rem) 0;
}

.section-label {
  padding-top: 0.45rem;
  color: var(--muted);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.section-content h2 {
  max-width: 880px;
  font-size: clamp(3.2rem, 6.5vw, 6.6rem);
}

.about-copy {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2rem, 6vw, 6rem);
  margin: clamp(3.5rem, 7vw, 6rem) 0;
}

.about-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.45vw, 1.2rem);
  line-height: 1.75;
}

.about-copy p:first-child {
  color: var(--ink);
}

.capabilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.capabilities div {
  padding: 2rem 1.5rem 0;
}

.capabilities div:first-child {
  padding-left: 0;
}

.capabilities div + div {
  border-left: 1px solid var(--line);
}

.capabilities h3,
.capability-list h3,
.principles h3 {
  margin: 0 0 0.8rem;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.capabilities p,
.capability-list p,
.principles p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  line-height: 1.7;
}

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

.capability-list {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line);
}

.capability-list article {
  display: grid;
  grid-template-columns: 0.7fr 1.2fr 1.5fr;
  gap: 2rem;
  align-items: start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.capability-number {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
}

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

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line);
}

.principles article {
  min-height: 250px;
  padding: 2rem clamp(1.2rem, 2.5vw, 2.5rem);
}

.principles article:first-child {
  padding-left: 0;
}

.principles article + article {
  border-left: 1px solid var(--line);
}

.principles span {
  display: block;
  margin-bottom: 4rem;
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.1rem;
  font-style: italic;
}

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

.certification-list {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--line);
}

.certification-list article {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto;
  gap: clamp(1rem, 2.5vw, 2.5rem);
  align-items: center;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}

.certification-number {
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1rem;
  font-style: italic;
}

.certification-list h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 400;
  line-height: 1.3;
}

.certification-list p,
.certification-list time {
  color: var(--muted);
  font-size: 0.76rem;
  line-height: 1.5;
}

.certification-list p {
  margin: 0.4rem 0 0;
}

.certification-list time {
  white-space: nowrap;
}

.contact {
  position: relative;
  overflow: hidden;
  margin-bottom: 2rem;
  padding: clamp(4rem, 9vw, 8rem);
  color: var(--contact-ink);
  background: var(--contact-bg);
  transition: color 220ms ease, background-color 220ms ease;
}

.contact::after {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -55%;
  width: 50vw;
  height: 50vw;
  border: 1px solid var(--contact-line);
  border-radius: 50%;
  box-shadow: 0 0 0 5vw var(--contact-line), 0 0 0 10vw var(--contact-line);
  opacity: 0.5;
}

.contact .eyebrow {
  color: var(--contact-muted);
}

.contact h2 {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 3rem 0;
  font-size: clamp(3.6rem, 7vw, 7.2rem);
}

.contact h2 em {
  color: var(--contact-accent);
}

.email-link {
  position: relative;
  z-index: 1;
  display: inline-block;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--contact-muted);
  font-size: clamp(0.9rem, 1.5vw, 1.1rem);
  font-weight: 650;
  transition: color 180ms ease, border-color 180ms ease;
}

.email-link:hover,
.email-link:focus-visible {
  color: var(--contact-accent);
  border-color: currentColor;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

footer p {
  margin: 0;
}

@media (max-width: 780px) {
  .site-header,
  main,
  footer {
    width: min(100% - 2rem, 1280px);
  }

  .site-header {
    min-height: 80px;
  }

  nav > a:not(.nav-contact) {
    display: none;
  }

  .hero {
    min-height: calc(100svh - 80px);
    padding-top: 3rem;
  }

  h1 {
    margin: 2.5rem 0;
    font-size: clamp(3.7rem, 17vw, 6rem);
  }

  .hero-bottom,
  .section-grid,
  .about-copy {
    grid-template-columns: 1fr;
  }

  .hero-links {
    justify-content: flex-start;
  }

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

  .stats article,
  .stats article:first-child {
    justify-content: space-between;
    padding: 1.7rem 0;
  }

  .stats article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .stats span {
    text-align: right;
  }

  .section-grid {
    gap: 2.5rem;
  }

  .section-content h2 {
    font-size: clamp(3rem, 14vw, 5rem);
  }

  .about-copy {
    gap: 1.5rem;
  }

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

  .capabilities div,
  .capabilities div:first-child {
    padding: 1.5rem 0;
  }

  .capabilities div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

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

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

  .principles article,
  .principles article:first-child {
    min-height: auto;
    padding: 1.8rem 0;
  }

  .principles article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .principles span {
    margin-bottom: 2.5rem;
  }

  .certification-list article {
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: 0.8rem;
  }

  .certification-list time {
    grid-column: 2;
  }

  .contact {
    padding: 3rem 1.5rem;
  }

  .contact h2 {
    font-size: clamp(3.2rem, 15vw, 5rem);
  }

  footer {
    gap: 1rem;
  }
}

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

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