:root {
  --color-primary: #89CFF0;
  --color-primary-soft: #C8F5FF;
  --color-mint: #89DDF0;
  --color-ink: #050607;
  --color-text: #F6FBFC;
  --color-muted: #8AA4AA;
  --color-line: rgba(137, 207, 240, 0.22);
  --font-display: "Arial Narrow", "Helvetica Neue Condensed", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --cursor-default: url("../images/cursors/pointer-small.png?v=cur-clean2") 0 0, auto;
  --cursor-link: url("../images/cursors/link-small.png?v=cur-clean2") 0 0, pointer;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  cursor: var(--cursor-default);
}

body {
  margin: 0;
  color: var(--color-text);
  font-family: var(--font-body);
  background:
    linear-gradient(90deg, rgba(137, 207, 240, 0.08) 1px, transparent 1px),
    linear-gradient(180deg, #020303 0%, #070B0D 46%, #020303 100%);
  background-size: 88px 88px, auto;
  overflow-x: hidden;
  cursor: var(--cursor-default);
  user-select: none;
  -webkit-user-select: none;
}

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

a,
button {
  cursor: var(--cursor-link);
}

::selection {
  color: inherit;
  background: transparent;
}

.cursor-light {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
  width: 320px;
  height: 320px;
  pointer-events: none;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(137, 207, 240, 0.24), transparent 68%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.header {
  position: fixed;
  top: 34px;
  left: 38px;
  z-index: 20;
  display: grid;
  gap: 24px;
  transition: top 0.16s cubic-bezier(0.16, 1, 0.3, 1), left 0.16s cubic-bezier(0.16, 1, 0.3, 1), right 0.16s cubic-bezier(0.16, 1, 0.3, 1), gap 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-logo {
  display: block;
  width: 112px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.site-logo:hover {
  opacity: 0.86;
  transform: translateX(4px);
}

.site-logo img {
  display: block;
  width: 100%;
  height: auto;
}

.navigation {
  display: grid;
  gap: 8px;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 42px);
  font-weight: 900;
  line-height: 0.98;
  text-transform: uppercase;
  transition: font-size 0.16s cubic-bezier(0.16, 1, 0.3, 1), gap 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

.navigation a {
  width: fit-content;
  color: transparent;
  -webkit-text-stroke: 1px rgba(246, 251, 252, 0.86);
  transition: color 0.25s ease, -webkit-text-stroke-color 0.25s ease, transform 0.25s ease;
}

.navigation a:hover,
.navigation a.is-active {
  color: var(--color-text);
  -webkit-text-stroke-color: var(--color-text);
  transform: translateX(8px);
}

.language-switch {
  position: fixed;
  top: 34px;
  right: 108px;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: var(--color-muted);
  background: rgba(5, 6, 7, 0.62);
  backdrop-filter: blur(16px);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  transition: top 0.16s cubic-bezier(0.16, 1, 0.3, 1), right 0.16s cubic-bezier(0.16, 1, 0.3, 1), font-size 0.16s cubic-bezier(0.16, 1, 0.3, 1), transform 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

.language-button {
  padding: 0;
  border: 0;
  color: var(--color-muted);
  background: transparent;
  font: inherit;
  cursor: var(--cursor-link);
  transition: color 0.2s ease, transform 0.2s ease;
}

.language-button:hover,
.language-button.is-active {
  color: var(--color-primary);
  transform: translateY(-1px);
}

.section {
  position: relative;
  z-index: 2;
  width: min(1280px, calc(100% - 72px));
  margin: 0 auto;
  padding: 120px 0 120px 320px;
}

.hero {
  display: grid;
  min-height: 100vh;
  align-items: end;
  padding-top: 120px;
  padding-bottom: 74px;
}

.hero-copy {
  max-width: 900px;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-title {
  display: grid;
  gap: 0;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(72px, 14vw, 188px);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: 0;
  text-transform: uppercase;
}

html[lang="en"] .hero-title {
  font-size: clamp(64px, 11vw, 148px);
  line-height: 0.88;
}

.hero-title span:first-child {
  color: transparent;
  -webkit-text-stroke: 1.4px var(--color-text);
}

.hero-title span:last-child {
  color: var(--color-text);
}

.hero-description,
.section-description,
.research-panel p,
.contact-copy p,
.about-card p,
.project-card p,
.history-list p {
  max-width: 680px;
  color: #B8CDD1;
  font-size: 17px;
  line-height: 1.84;
}

.hero-description {
  margin-top: 30px;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 900;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}

.primary-button {
  color: #061014;
  background: var(--color-primary);
}

.ghost-button {
  border: 1px solid var(--color-line);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.04);
}

.button:hover {
  transform: translateY(-3px);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 64px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
}

.hero-meta span {
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 900;
}

.hero-meta span::after {
  content: " /";
  color: var(--color-primary);
}

.hero-meta span:last-child::after {
  content: "";
}

.section-heading {
  max-width: 820px;
  margin-bottom: 44px;
}

.section-heading h2,
.research-panel h2,
.contact-copy h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(42px, 7vw, 92px);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: 0;
  text-transform: uppercase;
}

.contact-copy h2 {
  max-width: 720px;
  font-size: clamp(26px, 3.2vw, 42px);
  line-height: 1.16;
}

.about-grid,
.project-grid,
.history-layout {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.about-card,
.project-card,
.history-block {
  min-height: 280px;
  padding: 28px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: rgba(255, 255, 255, 0.025);
  transition: background 0.25s ease, transform 0.25s ease;
}

.about-card:hover,
.project-card:hover,
.history-block:hover {
  background: rgba(137, 207, 240, 0.08);
  transform: translateY(-4px);
}

.about-card h3,
.project-card h3,
.history-block h3 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  line-height: 0.95;
  text-transform: uppercase;
}

.history-layout {
  grid-template-columns: 0.9fr 1.1fr;
}

.history-list {
  display: grid;
  gap: 0;
  padding: 0;
  margin: 30px 0 0;
  list-style: none;
  border-top: 1px solid var(--color-line);
}

.history-list li {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-line);
}

.copyright-list li {
  grid-template-columns: 160px 1fr;
}

.history-year {
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 900;
  overflow-wrap: anywhere;
}

.history-list p {
  margin: 0;
  max-width: none;
  overflow-wrap: anywhere;
}

.history-list a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-primary);
}

.research-panel {
  padding: 46px 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.research-panel h2 {
  max-width: 1000px;
}

.research-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding: 0;
  margin: 42px 0 0;
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
  list-style: none;
}

.research-list li {
  min-height: 84px;
  padding: 20px;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  color: #DCEFF2;
  font-weight: 700;
}

.card-number {
  display: block;
  margin-bottom: 76px;
  color: var(--color-primary);
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 900;
  line-height: 0.8;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  max-width: 780px;
}

.skill-tag {
  padding: 10px 14px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  color: #DCEFF2;
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-display);
  font-weight: 900;
}

.contact {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: end;
  border-top: 1px solid var(--color-line);
}

.footer {
  width: min(1280px, calc(100% - 72px));
  margin: 0 auto;
  padding: 28px 0 44px 320px;
  color: var(--color-muted);
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.85s ease, transform 0.85s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 960px) {
  .header {
    top: 18px;
    left: 18px;
    right: 18px;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
  }

  .language-switch {
    top: 184px;
    right: 18px;
    font-size: 13px;
  }

  .navigation {
    justify-items: end;
    font-size: 24px;
  }

  .section {
    width: min(100% - 32px, 720px);
    padding: 120px 0 90px;
  }

  .hero {
    align-items: center;
    padding-top: 170px;
  }

  .hero-title {
    font-size: clamp(68px, 24vw, 110px);
  }

  .about-grid,
  .project-grid,
  .history-layout,
  .research-list,
  .contact {
    grid-template-columns: 1fr;
  }

  .about-card,
  .project-card {
    min-height: 220px;
  }

  .footer {
    width: min(100% - 32px, 720px);
    padding-left: 0;
  }
}

@media (max-width: 520px) {
  .cursor-light {
    display: none;
  }

  .language-switch {
    top: 158px;
  }

  .navigation {
    font-size: 19px;
  }

  .site-logo {
    width: 86px;
  }

  .hero-title {
    font-size: clamp(62px, 22vw, 86px);
  }

  .hero-description,
  .section-description,
  .research-panel p,
  .contact-copy p,
  .about-card p,
  .project-card p,
  .history-list p {
    font-size: 15px;
  }

  .history-list li,
  .copyright-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}