:root {
  --bg: #08131d;
  --surface: rgba(11, 25, 39, 0.84);
  --text: #eef5f7;
  --muted: #95a8b9;
  --line: rgba(148, 178, 201, 0.18);
  --brand: #f1ba4a;
  --brand-strong: #ff8d44;
  --accent: #75d2cf;
  --accent-strong: #9cf1d3;
  --shadow: 0 28px 70px rgba(0, 0, 0, 0.32);
  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-sm: 16px;
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Noto Sans KR", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(117, 210, 207, 0.12), transparent 26rem),
    radial-gradient(circle at top right, rgba(241, 186, 74, 0.12), transparent 22rem),
    linear-gradient(180deg, #09141e 0%, #08131d 52%, #0b1724 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(255, 255, 255, 0.03), transparent 24%),
    linear-gradient(300deg, rgba(255, 255, 255, 0.02), transparent 28%);
  opacity: 0.75;
}

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

.site-shell {
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(8, 19, 29, 0.68);
  border-bottom: 1px solid rgba(148, 178, 201, 0.09);
}

.header-inner,
.footer-inner {
  width: min(100% - 3rem, var(--max-width));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
}

.brand-mark {
  width: 2.9rem;
  height: 2.9rem;
  display: inline-grid;
  place-items: center;
  border-radius: 1rem;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  color: #10131a;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 16px 30px rgba(241, 186, 74, 0.18);
}

.brand-copy {
  display: grid;
  gap: 0.15rem;
}

.brand-copy strong {
  font-size: 0.98rem;
  letter-spacing: 0.01em;
}

.brand-copy small {
  color: var(--muted);
  font-size: 0.78rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.1rem;
}

.nav a,
.footer-links a,
.text-link {
  color: var(--muted);
  transition: color 160ms ease;
}

.nav a:hover,
.nav a:focus-visible,
.footer-links a:hover,
.footer-links a:focus-visible,
.text-link:hover,
.text-link:focus-visible,
.cta-link:hover,
.cta-link:focus-visible {
  color: var(--accent-strong);
}

.section {
  width: min(100% - 3rem, var(--max-width));
  margin: 0 auto;
  padding: 0 0 5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(320px, 0.94fr);
  gap: 2rem;
  align-items: stretch;
  padding-top: 4.25rem;
}

.hero-copy,
.hero-panel,
.surface-card,
.priority-card,
.contact-card,
.policy-card,
.policy-section,
.paper-card,
.project-card,
.timeline-item {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.eyebrow,
.section-kicker,
.panel-label,
.timeline-period,
.project-period,
.paper-journal,
.role-index {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.eyebrow,
.section-kicker {
  font-size: 0.85rem;
  margin: 0 0 1rem;
}

.hero-title,
.section-heading h2,
.hero-panel h2,
.contact-copy h2,
.policy-hero h1 {
  margin: 0;
  font-family: "Space Grotesk", "Noto Sans KR", sans-serif;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 5rem);
  max-width: 12ch;
}

.hero-summary,
.section-heading p,
.contact-copy p,
.policy-lead,
.policy-section p {
  color: var(--muted);
  line-height: 1.75;
}

.hero-summary {
  max-width: 60ch;
  margin: 1.4rem 0 0;
  font-size: 1.02rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.85rem 1.3rem;
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button--primary {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-strong) 100%);
  color: #11151c;
}

.button--ghost {
  border: 1px solid rgba(117, 210, 207, 0.24);
  color: var(--accent-strong);
  background: rgba(117, 210, 207, 0.08);
}

.proof-list,
.feature-list,
.policy-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.proof-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 2rem;
}

.proof-list li,
.feature-list li,
.policy-list li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--text);
  line-height: 1.7;
}

.proof-list li::before,
.feature-list li::before,
.policy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78rem;
  width: 0.48rem;
  height: 0.48rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--accent) 100%);
  box-shadow: 0 0 0 4px rgba(117, 210, 207, 0.08);
}

.hero-panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 1.55rem;
  background: linear-gradient(180deg, rgba(15, 32, 48, 0.96) 0%, rgba(11, 23, 36, 0.96) 100%);
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 2.65rem 2.65rem;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 88%);
  opacity: 0.55;
  pointer-events: none;
}

.hero-panel__header,
.hero-panel__grid,
.hero-note {
  position: relative;
  z-index: 1;
}

.hero-panel__header h2 {
  font-size: clamp(1.8rem, 4vw, 2.65rem);
  max-width: 12ch;
  margin-top: 0.4rem;
}

.hero-panel__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.95rem;
  margin-top: 1.6rem;
}

.metric-card {
  min-height: 10.5rem;
  border-radius: var(--radius-sm);
  padding: 1rem;
  background: linear-gradient(180deg, rgba(17, 37, 56, 0.95), rgba(14, 27, 42, 0.88));
  border: 1px solid rgba(148, 178, 201, 0.12);
}

.metric-card__value {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.5rem;
  color: var(--accent-strong);
}

.metric-card__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
}

.metric-card p {
  margin: 0.9rem 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 0.92rem;
}

.hero-note {
  margin: 1.25rem 0 0;
  padding: 1rem 1.05rem;
  border-radius: 1rem;
  background: rgba(241, 186, 74, 0.12);
  color: #f9e2b2;
  line-height: 1.7;
}

.section-heading {
  max-width: 44rem;
  margin-bottom: 1.6rem;
}

.section-heading h2 {
  font-size: clamp(1.9rem, 4vw, 3.15rem);
}

.section-heading p {
  margin: 0.95rem 0 0;
}

.section-heading--compact {
  margin-top: 2.4rem;
}

.section-heading--compact h2 {
  font-size: clamp(1.55rem, 3vw, 2.3rem);
}

.card-grid,
.detail-grid,
.project-grid,
.paper-stack,
.timeline,
.contact-links {
  display: grid;
  gap: 1rem;
}

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

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

.surface-card,
.priority-card,
.contact-card,
.policy-card,
.policy-section,
.timeline-item,
.project-card,
.paper-card {
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, var(--surface) 0%, rgba(9, 21, 32, 0.88) 100%);
}

.surface-card {
  padding: 1.35rem;
}

.role-card h3,
.sub-card h3,
.priority-card h3,
.case-card h3,
.readiness-card h3,
.timeline-item h3,
.project-card h3,
.paper-card h3,
.policy-section h2 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.role-index {
  display: block;
  margin-bottom: 0.9rem;
  font-size: 0.76rem;
}

.role-card p,
.sub-card p,
.priority-card p,
.case-card p,
.readiness-card p,
.timeline-item p,
.project-card p,
.paper-card p {
  margin: 0.85rem 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.overview-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(280px, 0.82fr);
  gap: 1rem;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 2.2rem;
  padding: 0.5rem 0.9rem;
  border-radius: 999px;
  background: rgba(117, 210, 207, 0.1);
  border: 1px solid rgba(117, 210, 207, 0.18);
  color: var(--accent-strong);
  font-size: 0.88rem;
}

.detail-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.1rem;
}

.sub-card,
.case-card,
.readiness-card {
  padding: 1.25rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, rgba(18, 36, 54, 0.9), rgba(11, 24, 37, 0.92));
  border: 1px solid rgba(148, 178, 201, 0.12);
}

.priority-card {
  padding: 1.35rem;
  background:
    radial-gradient(circle at top right, rgba(241, 186, 74, 0.14), transparent 14rem),
    linear-gradient(180deg, rgba(36, 26, 13, 0.9) 0%, rgba(15, 21, 29, 0.94) 100%);
}

.stack-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.text-link {
  color: #f5d28b;
  font-weight: 700;
}

.timeline {
  gap: 1.1rem;
}

.timeline-item {
  position: relative;
  padding: 1.35rem 1.35rem 1.35rem 1.6rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0.75rem;
  top: 1.52rem;
  bottom: 1.5rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(117, 210, 207, 0.5), transparent);
}

.timeline-period {
  display: inline-block;
  margin-bottom: 0.45rem;
  font-size: 0.8rem;
}

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

.project-card {
  overflow: hidden;
}

.project-card__media {
  min-height: 13rem;
  background-size: cover;
  background-position: center;
}

.project-card__media--fallback {
  display: grid;
  place-items: center;
  padding: 1rem;
  background:
    radial-gradient(circle at top left, rgba(117, 210, 207, 0.28), transparent 11rem),
    linear-gradient(135deg, rgba(18, 42, 62, 1) 0%, rgba(15, 24, 35, 1) 100%);
  color: var(--accent-strong);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
}

.project-card__body {
  padding: 1.25rem;
}

.project-period {
  font-size: 0.82rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 1rem;
}

.tag {
  padding: 0.35rem 0.65rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 0.8rem;
}

.project-card__footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  margin-top: 1.2rem;
}

.cta-link {
  color: var(--accent-strong);
  font-weight: 700;
}

.project-status {
  color: #f5d28b;
  font-size: 0.9rem;
}

.paper-card {
  padding: 1.35rem;
}

.paper-journal {
  display: inline-block;
  margin-bottom: 0.65rem;
  font-size: 0.8rem;
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(280px, 0.82fr);
  gap: 1rem;
  padding: 1.5rem;
}

.contact-side {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.profile-photo {
  width: 100%;
  max-width: 14rem;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 1.6rem;
  border: 1px solid rgba(148, 178, 201, 0.18);
}

.contact-links {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.contact-link {
  display: grid;
  gap: 0.28rem;
  min-height: 5.25rem;
  padding: 1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(148, 178, 201, 0.12);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    color 160ms ease,
    background 160ms ease;
}

.contact-link:hover,
.contact-link:focus-visible {
  transform: translateY(-1px);
  color: var(--accent-strong);
  border-color: rgba(117, 210, 207, 0.28);
  background: rgba(117, 210, 207, 0.06);
}

.contact-link__label {
  color: var(--muted);
  font-size: 0.82rem;
}

.contact-link strong {
  line-height: 1.45;
}

.footer {
  border-top: 1px solid rgba(148, 178, 201, 0.08);
  padding: 1.6rem 0 2.25rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

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

.policy-page {
  width: min(100% - 3rem, 980px);
  margin: 0 auto;
  padding: 4rem 0 5rem;
}

.policy-hero {
  margin-bottom: 1.6rem;
}

.policy-hero h1 {
  font-size: clamp(2.3rem, 4vw, 3.8rem);
}

.policy-lead {
  max-width: 48rem;
  margin-top: 1rem;
}

.policy-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 1.2rem;
}

.policy-card {
  display: grid;
  gap: 0.35rem;
  min-width: 12rem;
  padding: 1rem 1.05rem;
}

.policy-card span {
  color: var(--muted);
  font-size: 0.82rem;
}

.policy-layout {
  display: grid;
  gap: 1rem;
}

.policy-section {
  padding: 1.4rem;
}

.policy-section h2 {
  margin-bottom: 0.75rem;
}

.policy-note {
  margin-top: 1rem;
  padding: 1rem 1.05rem;
  border-radius: 1rem;
  background: rgba(117, 210, 207, 0.08);
  color: #d2f2f1;
}

code {
  font-family: "Space Grotesk", monospace;
  color: #f6d89c;
}

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

@media (prefers-reduced-motion: no-preference) {
  .hero-copy {
    animation: fade-up 520ms ease-out both;
  }

  .hero-panel {
    animation: fade-up 620ms ease-out both;
  }

  .card-grid > *,
  .timeline > *,
  .project-grid > *,
  .paper-stack > *,
  .policy-layout > * {
    animation: fade-up 680ms ease-out both;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .card-grid--4,
  .card-grid--3,
  .project-grid,
  .contact-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .hero,
  .overview-layout,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .hero-panel__header h2 {
    max-width: 100%;
  }

  .profile-photo {
    max-width: 10rem;
  }
}

@media (max-width: 720px) {
  .header-inner,
  .footer-inner,
  .section,
  .policy-page {
    width: min(100% - 2rem, var(--max-width));
  }

  .section {
    padding-bottom: 4rem;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-title {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
  }

  .hero-panel,
  .surface-card,
  .priority-card,
  .contact-card,
  .timeline-item,
  .paper-card,
  .policy-card,
  .policy-section {
    border-radius: 1.3rem;
  }

  .detail-grid,
  .card-grid--4,
  .card-grid--3,
  .project-grid,
  .contact-links,
  .hero-panel__grid {
    grid-template-columns: 1fr;
  }

  .nav {
    gap: 0.8rem;
  }
}