:root {
  --text: #111111;
  --muted: #666666;
  --subtle: #888888;
  --rule: #e7e7e7;
  --section-tint: #fcfbf8;
  --header-height: 72px;
  --body-size: 16px;
  --meta-size: 13px;
  --micro-size: 11px;
  --serif-display: "Nanum Myeongjo", "Times New Roman", serif;
  --page-max: 1180px;
  --side-col: 260px;
  --gutter: 72px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: #ffffff;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: var(--body-size);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 0 48px;
}

h1 {
  font-family: var(--serif-display);
  font-size: clamp(3.1rem, 8vw, 6.2rem);
  line-height: 0.96;
  font-weight: 500;
  letter-spacing: -0.03em;
  text-wrap: balance;
  margin-bottom: 30px;
}

h2 {
  font-family: var(--serif-display);
  font-size: clamp(1.95rem, 3vw, 2.7rem);
  line-height: 1.16;
  font-weight: 500;
  letter-spacing: -0.015em;
  margin-bottom: 0;
}

h3 {
  font-family: var(--serif-display);
  font-size: 1.5rem;
  line-height: 1.3;
  font-weight: 500;
  margin-bottom: 14px;
}

p { margin-bottom: 16px; }
p:last-child { margin-bottom: 0; }

.eyebrow {
  font-family: -apple-system, sans-serif;
  font-size: var(--micro-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--text);
  margin-bottom: 18px;
}

a { color: var(--text); }
a:hover { color: var(--subtle); }

em { font-style: italic; }
strong { font-weight: 600; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--rule);
  backdrop-filter: blur(6px);
}

.nav-shell {
  position: relative;
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  font-weight: 600;
  color: var(--text);
  display: inline-flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.4;
}

.brand strong {
  font-weight: 800;
}

.brand:hover {
  color: var(--text);
}

.brand span {
  color: var(--text);
  font-weight: 600;
}

.brand .brand-affiliation {
  text-transform: none;
  letter-spacing: 0.02em;
  font-style: italic;
  font-weight: 400;
  font-size: 11px;
  margin-top: 2px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 20px;
}

.site-nav a {
  font-size: var(--micro-size);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  text-decoration: none;
  color: #2b2b2b;
  font-weight: 600;
}

.site-nav a:hover {
  color: var(--subtle);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 4px 0;
  width: 26px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 1px;
  width: 100%;
  background: #111111;
  margin: 6px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

section {
  position: relative;
  z-index: 0;
  scroll-margin-top: calc(var(--header-height) + 44px);
  padding: 108px 0;
  border-bottom: none;
}

section:nth-of-type(even)::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: var(--section-tint);
  z-index: -1;
}

section:last-of-type { border-bottom: none; }

section:not(.hero) {
  display: grid;
  grid-template-columns: minmax(180px, var(--side-col)) minmax(0, 1fr);
  column-gap: var(--gutter);
  align-items: start;
}

section:not(.hero) > h2 {
  grid-column: 1;
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

section:not(.hero) > :not(h2) {
  grid-column: 2;
  max-width: 760px;
}

.hero {
  padding-top: 96px;
  max-width: 760px;
}

.hero .lede {
  max-width: 68ch;
  font-size: var(--body-size);
  line-height: 1.62;
  letter-spacing: normal;
  color: #3f3f3f;
  margin-bottom: 16px;
}

.hero .lede-emphasis {
  font-weight: 500;
  color: #1f1f1f;
  font-size: calc(var(--body-size) * 1.08);
}

.hero-engage {
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  max-width: 68ch;
}

.hero-engage-label {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: var(--meta-size);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  margin-bottom: 12px;
}

.hero-engage-topics {
  font-size: calc(var(--body-size) * 0.98);
  font-weight: 600;
  line-height: 1.7;
  color: #1f1f1f;
  margin-bottom: 0;
}

.hero-engage-link {
  color: inherit;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.hero-engage-link:hover,
.hero-engage-link:focus {
  color: #000000;
}

.hero-engage-sep {
  color: #666666;
  font-weight: 500;
}

.hero-divider {
  border: 0;
  border-top: 1px solid var(--rule);
  width: 64px;
  margin: 28px 0 24px;
}

.hero-detail .lede {
  color: #4a4a4a;
}

.hero-detail .lede em {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.hero-jump {
  color: inherit;
  text-decoration: none;
}

.hero-jump:hover em,
.hero-jump:focus em {
  color: var(--accent, #1a1a1a);
}

.competency-item {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.competency-accordion {
  display: grid;
  gap: 14px;
}

.competency-item {
  border: 1px solid var(--rule);
  background: #ffffff;
}

.competency-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  min-height: 112px;
  display: grid;
  grid-template-columns: minmax(170px, 220px) minmax(0, 1fr) 22px;
  column-gap: 18px;
  align-items: start;
}

.competency-item summary::-webkit-details-marker {
  display: none;
}

.competency-item summary::after {
  content: "+";
  font-size: 20px;
  line-height: 1;
  color: var(--subtle);
  justify-self: end;
}

.competency-item[open] summary::after {
  content: "−";
}

.competency-num {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: var(--micro-size);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--text);
  margin-top: 3px;
}

.competency-title {
  font-family: var(--serif-display);
  font-size: 1.45rem;
  line-height: 1.25;
  font-weight: 500;
  color: var(--text);
  max-width: 34ch;
}

.competency-body {
  border-top: 1px solid var(--rule);
  background: #ffffff;
  padding: 18px 22px 24px;
}

.competency-item[open] .competency-body {
  animation: accordionReveal 220ms ease-out;
}

.competency-body .pillar-engage {
  border-top: none;
  border-bottom: 1px solid var(--rule);
  padding-top: 0;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.hook-intro {
  border-top: 1px solid var(--rule);
  padding-top: 12px;
  margin-top: 18px;
}

.pillar {
  margin-bottom: 64px;
  padding-bottom: 8px;
  display: grid;
  grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
  column-gap: 34px;
  row-gap: 14px;
  align-items: start;
}

.pillar:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
}

.pillar > :not(.pillar-num):not(.pillar-engage) {
  grid-column: 2;
}

.pillar-num {
  grid-column: 1;
  grid-row: 1;
  font-family: -apple-system, sans-serif;
  font-size: var(--micro-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-top: 0;
}

.pillar-engage {
  grid-column: 1;
  grid-row: 2;
  font-family: -apple-system, sans-serif;
  font-size: var(--meta-size);
  line-height: 1.6;
  color: #4c4c4c;
  margin-top: 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule);
}

.pillar > h3 {
  grid-column: 2;
  grid-row: 1;
}

.pillar-engage strong {
  color: var(--text);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--micro-size);
  display: block;
  margin-bottom: 5px;
}

.example-list {
  list-style: none;
  margin: 16px 0 6px;
  padding: 0;
}

.example-list li {
  padding: 10px 0 10px 20px;
  position: relative;
  color: #1f1f1f;
  font-size: var(--body-size);
  font-weight: 500;
  line-height: 1.55;
}

.example-list li::before {
  content: "–";
  position: absolute;
  left: 0;
  color: var(--text);
  font-weight: 700;
}

.example-list li em {
  font-weight: 600;
  font-style: italic;
  color: var(--text);
}

.cta-card {
  display: block;
  margin-top: 26px;
  padding: 26px 30px 28px;
  border: 1px solid #d5d6de;
  border-radius: 10px;
  background: linear-gradient(135deg, #f9faff 0%, #ffffff 55%);
  box-shadow: 0 5px 14px rgba(14, 19, 45, 0.05);
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.cta-card:hover {
  border-color: #111111;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(14, 19, 45, 0.08);
  color: inherit;
}

.cta-title {
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 8px;
  color: var(--text);
}

.cta-sub {
  margin: 0;
  color: #3e4252;
  font-size: var(--meta-size);
  line-height: 1.55;
}

.cta-action {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #111111;
  margin-top: 16px;
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid #111111;
  border-radius: 999px;
  background: #ffffff;
}

.cta-action::after {
  content: " ↗";
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.15s ease;
}

.cta-card:hover .cta-action::after {
  transform: translateX(3px);
}

@keyframes accordionReveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.credentials-block {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-family: -apple-system, sans-serif;
  font-size: var(--meta-size);
  line-height: 1.58;
  color: #444;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px;
}

.credentials-block dt {
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--micro-size);
  font-weight: 600;
  margin-bottom: 4px;
}

.credentials-block dd {
  color: #222;
  margin-left: 0;
}

.credentials-block dl.credentials-wide {
  grid-column: 1 / -1;
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px solid #efefef;
}


.engage-block {
  margin-bottom: 38px;
  display: grid;
  grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
  column-gap: 28px;
  align-items: start;
}

.engage-block:last-child { margin-bottom: 0; }

.engage-block .audience {
  grid-column: 1;
  font-family: -apple-system, sans-serif;
  font-size: var(--micro-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-top: 3px;
}

.engage-block > :not(.audience) {
  grid-column: 2;
}

#writing .engage-block h3 a {
  text-decoration: none;
}

#writing .engage-block h3 a:hover {
  color: var(--text);
}

.read-more-pill {
  display: inline-flex;
  justify-self: start;
  align-items: center;
  margin-top: 14px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: #111111;
  padding: 8px 12px;
  border: 1px solid #111111;
  border-radius: 999px;
  background: transparent;
}

.read-more-pill::after {
  content: " ↗";
  display: inline-block;
  margin-left: 6px;
  transition: transform 0.15s ease;
}

.read-more-pill:hover::after {
  transform: translateX(3px);
}

section#about > .about-side {
  grid-column: 1;
  max-width: none;
  display: flex;
  flex-direction: column;
  gap: 28px;
  align-self: start;
}

section#about > .about-body {
  grid-column: 2;
  max-width: 760px;
}

.about-side h2 {
  position: sticky;
  top: calc(var(--header-height) + 20px);
}

.about-portrait {
  margin: 0;
  max-width: 200px;
}

.about-portrait img {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--rule);
}

.contact-grid {
  margin-top: 44px;
  padding-top: 26px;
  border-top: 1px solid var(--rule);
  font-family: -apple-system, sans-serif;
  font-size: var(--meta-size);
  line-height: 1.56;
  color: #444;
}

.contact-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 36px;
}

.contact-grid dt {
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: var(--micro-size);
  font-weight: 600;
  margin-bottom: 4px;
  margin-top: 16px;
}

.contact-grid dt:first-child { margin-top: 0; }

.contact-grid dd {
  color: #222;
  margin-left: 0;
  margin-bottom: 4px;
}

.contact-note {
  margin-top: 26px;
  font-family: -apple-system, sans-serif;
  font-size: var(--meta-size);
  color: var(--subtle);
  font-style: italic;
}

footer {
  position: relative;
  padding: 28px 0 36px;
  font-family: -apple-system, sans-serif;
  font-size: var(--meta-size);
  color: var(--subtle);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  border-top: 1px solid var(--rule);
}

@media (max-width: 980px) {
  :root {
    --header-height: 64px;
    --gutter: 44px;
    --side-col: 220px;
  }

  .container { padding: 0 30px; }

  .nav-shell {
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 12px;
    padding-bottom: 12px;
    gap: 10px 18px;
  }

  section:not(.hero) > h2,
  .about-side h2 {
    position: static;
    margin-bottom: 8px;
  }

  .pillar,
  .engage-block {
    grid-template-columns: 1fr;
    row-gap: 10px;
  }

  .pillar > :not(.pillar-num):not(.pillar-engage),
  .engage-block > :not(.audience),
  .pillar-num,
  .pillar-engage,
  .engage-block .audience {
    grid-column: 1;
  }

  .pillar > h3,
  .pillar-num,
  .pillar-engage {
    grid-row: auto;
  }

  .pillar-engage {
    margin-top: 2px;
    padding-top: 10px;
  }

  .competency-item summary {
    grid-template-columns: 1fr 20px;
    min-height: 0;
    row-gap: 8px;
    align-items: start;
  }

  .competency-num {
    grid-column: 1;
  }

  .competency-title {
    grid-column: 1;
  }
}

@media (max-width: 760px) {
  .container { padding: 0 24px; }
  body { font-size: 15px; }
  h1 { line-height: 0.98; }
  section { padding: 66px 0; }
  .hero { padding-top: 84px; }

  .brand {
    font-size: 10px;
    max-width: calc(100% - 56px);
    line-height: 1.35;
  }

  .nav-shell {
    min-height: var(--header-height);
    align-items: center;
    justify-content: space-between;
    flex-wrap: nowrap;
    padding-top: 10px;
    padding-bottom: 10px;
    gap: 16px;
  }

  .nav-toggle {
    display: block;
    flex-shrink: 0;
    margin-right: 4px;
    padding: 4px;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 24px;
    right: 24px;
    display: none;
    padding: 14px 6px 20px;
    border-bottom: 1px solid var(--rule);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(6px);
  }

  .site-header.menu-open .site-nav {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .site-header.menu-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header.menu-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.menu-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .site-nav a {
    font-family: var(--serif-display);
    font-size: clamp(1.6rem, 8vw, 2.2rem);
    line-height: 1.15;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
    padding: 6px 2px;
  }

  section:not(.hero) {
    grid-template-columns: 1fr;
    row-gap: 24px;
  }

  section:not(.hero) > h2,
  section:not(.hero) > :not(h2) {
    grid-column: 1;
    max-width: none;
  }

  .credentials-block,
  .contact-details {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .about-side {
    gap: 18px;
  }

  .about-portrait {
    max-width: 140px;
  }
}