/* ===================================================================
   영원AI · 0neAI — styles.css
   =================================================================== */

@font-face {
  font-family: "Pretendard Variable";
  font-weight: 45 920;
  font-style: normal;
  font-display: swap;
  src: url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/woff2/PretendardVariable.woff2")
    format("woff2-variations");
}

:root {
  --ink: #0a0e1a;
  --ink-soft: #1a2238;
  --brand: #2563eb;
  --brand-2: #06b6d4;
  --brand-3: #7c3aed;
  --paper: #ffffff;
  --mist: #f4f6fb;
  --line: rgba(10, 14, 26, 0.06);

  --maxw: 72rem;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", "Apple SD Gothic Neo", "Noto Sans KR",
    sans-serif;

  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.6;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

img,
svg {
  display: block;
  max-width: 100%;
}

::selection {
  background: color-mix(in srgb, var(--brand) 25%, transparent);
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: 1.25rem;
}

@media (min-width: 640px) {
  .container {
    padding-inline: 2rem;
  }
}

.gradient-text {
  background: linear-gradient(90deg, #7dd3fc, #67e8f9, #c4b5fd);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- header ---------- */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: inline-flex;
  align-items: center;
}

.logo__img {
  display: block;
  height: 1.85rem;
  width: auto;
}

/* header swaps between white (over dark hero) and color (scrolled / light) */
.logo--header .logo__img--dark {
  display: none;
}

.header.scrolled .logo--header .logo__img--light {
  display: none;
}

.header.scrolled .logo--header .logo__img--dark {
  display: block;
}

.nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

.nav a {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(10, 14, 26, 0.7);
  transition: background 0.2s, color 0.2s;
}

.nav a:hover {
  background: var(--mist);
  color: var(--ink);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-weight: 600;
  border-radius: 999px;
  transition: transform 0.2s, background 0.2s, color 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--dark {
  background: var(--ink);
  color: #fff;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
}

.btn--dark:hover {
  background: var(--brand);
}

.btn--light {
  background: #fff;
  color: var(--ink);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: none;
}

.header .btn--dark {
  display: none;
}

.menu-toggle {
  display: grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid rgba(10, 14, 26, 0.1);
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 0.18rem 0;
  background: var(--ink);
}

.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
}

.mobile-nav.open {
  display: block;
}

.mobile-nav nav {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 0;
}

.mobile-nav a {
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  font-weight: 500;
  font-size: 0.9rem;
  color: rgba(10, 14, 26, 0.8);
}

.mobile-nav a:hover {
  background: var(--mist);
}

.mobile-nav .btn--dark {
  display: inline-flex;
  margin-top: 0.25rem;
  justify-content: center;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
  }
  .menu-toggle {
    display: none;
  }
}

@media (min-width: 640px) {
  .header .btn--dark {
    display: inline-flex;
  }
}

/* ---------- sections ---------- */
.section {
  padding-block: 6rem;
}

@media (min-width: 640px) {
  .section {
    padding-block: 8rem;
  }
}

.section--mist {
  background: var(--mist);
}

.section--dark {
  background: var(--ink);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.eyebrow {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--brand);
}

.eyebrow--cyan {
  color: var(--brand-2);
}

.section-head {
  max-width: 42rem;
  margin: 0 auto;
  text-align: center;
}

.section-head h2 {
  margin: 0.75rem 0 0;
  font-size: clamp(1.875rem, 4vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.15;
}

.section-head p {
  margin: 1rem 0 0;
  font-size: 1.125rem;
  color: rgba(10, 14, 26, 0.6);
}

.section--dark .section-head p {
  color: rgba(255, 255, 255, 0.7);
}

/* ---------- decorative blobs + grid ---------- */
.bg-deco {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.blob {
  position: absolute;
  border-radius: 999px;
  filter: blur(64px);
  animation: blob 18s ease-in-out infinite;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  opacity: 0.18;
  background-image: linear-gradient(
      to right,
      rgba(255, 255, 255, 0.4) 1px,
      transparent 1px
    ),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.4) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(
    ellipse 70% 60% at 50% 35%,
    black,
    transparent
  );
  mask-image: radial-gradient(ellipse 70% 60% at 50% 35%, black, transparent);
}

@keyframes blob {
  0%,
  100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -40px) scale(1.1);
  }
  66% {
    transform: translate(-25px, 25px) scale(0.95);
  }
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
  padding-top: 8rem;
  padding-bottom: 6rem;
  text-align: center;
}

@media (min-width: 640px) {
  .hero {
    padding-top: 10rem;
    padding-bottom: 8rem;
  }
}

.hero .container {
  position: relative;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  padding: 0.375rem 1rem;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.8);
}

.pill .dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: var(--brand-2);
}

.hero h1 {
  max-width: 56rem;
  margin: 1.75rem auto 0;
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.hero__lead {
  max-width: 40rem;
  margin: 1.5rem auto 0;
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
}

.hero__cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.hero__cta .btn {
  width: 100%;
}

.arrow {
  transition: transform 0.2s;
}

.btn:hover .arrow {
  transform: translateX(4px);
}

@media (min-width: 640px) {
  .hero__cta {
    flex-direction: row;
  }
  .hero__cta .btn {
    width: auto;
  }
}

/* stats */
.stats {
  max-width: 48rem;
  margin: 4rem auto 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 1rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
}

.stats > div {
  background: rgba(10, 14, 26, 0.6);
  backdrop-filter: blur(8px);
  padding: 1.5rem 1rem;
}

.stats .num {
  font-size: clamp(1.5rem, 4vw, 1.875rem);
  font-weight: 800;
}

.stats .lbl {
  margin-top: 0.25rem;
  font-size: 0.75rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.55);
}

@media (min-width: 640px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------- products ---------- */
.products {
  margin-top: 3.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.product {
  display: grid;
  gap: 2rem;
  align-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  padding: 1.75rem;
  transition: box-shadow 0.3s;
}

.product:hover {
  box-shadow: 0 30px 60px -30px rgba(10, 14, 26, 0.25);
}

@media (min-width: 640px) {
  .product {
    padding: 2.5rem;
  }
}

@media (min-width: 1024px) {
  .product {
    grid-template-columns: 1fr 1fr;
  }
  .product--rev .product__body {
    order: 2;
  }
  .product--rev .product__art {
    order: 1;
  }
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--mist);
  color: var(--brand);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.product__name {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.25rem 0.65rem;
  margin: 1rem 0 0;
  font-size: clamp(1.5rem, 3vw, 1.875rem);
  font-weight: 800;
  letter-spacing: -0.025em;
}

.product__name .sub {
  font-size: 1.125rem;
  font-weight: 600;
  color: rgba(10, 14, 26, 0.45);
}

.product__headline {
  margin: 0.25rem 0 0;
  font-size: 1.125rem;
  font-weight: 600;
  color: rgba(10, 14, 26, 0.8);
}

.product__desc {
  margin: 1rem 0 0;
  color: rgba(10, 14, 26, 0.6);
}

.checklist {
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.checklist li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: rgba(10, 14, 26, 0.75);
}

.check {
  margin-top: 0.25rem;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 999px;
  color: #fff;
  font-size: 0.625rem;
}

.product__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.75rem;
  padding: 0.625rem 1.25rem;
  border-radius: 999px;
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform 0.2s;
}

.product__link:hover {
  transform: translateY(-2px);
}

.product__art {
  position: relative;
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  border-radius: 1rem;
  overflow: hidden;
}

.art-fill {
  position: absolute;
  inset: 0;
}

.product__art::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.25;
  background: radial-gradient(
      circle at 20% 20%,
      rgba(255, 255, 255, 0.6),
      transparent 40%
    ),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.4), transparent 45%);
}

.product__glyph {
  position: relative;
  font-size: clamp(4.5rem, 12vw, 6rem);
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.25));
}

.product__art .label {
  position: absolute;
  bottom: 1rem;
  right: 1.25rem;
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.8);
}

/* gradient helpers */
.g-blue {
  background: linear-gradient(135deg, #2563eb, #38bdf8, #22d3ee);
}
.g-violet {
  background: linear-gradient(135deg, #7c3aed, #d946ef, #f472b6);
}
.g-amber {
  background: linear-gradient(135deg, #f59e0b, #f97316, #fb7185);
}

/* ---------- topik deep dive ---------- */
.topik-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .topik-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.topik-grid h2 {
  margin: 0.75rem 0 0;
  font-size: clamp(1.875rem, 4vw, 2.25rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.topik-grid > div:first-child > p {
  margin: 1.25rem 0 0;
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
}

.audience {
  margin-top: 2.25rem;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .audience {
    grid-template-columns: repeat(3, 1fr);
  }
}

.audience > div {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(8px);
  border-radius: 1rem;
  padding: 1.25rem;
}

.audience .ico {
  font-size: 1.5rem;
}

.audience .t {
  margin-top: 0.75rem;
  font-weight: 700;
}

.audience .d {
  margin-top: 0.25rem;
  font-size: 0.875rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.55);
}

.panel {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.1),
    rgba(255, 255, 255, 0.02)
  );
  backdrop-filter: blur(8px);
  border-radius: 1.5rem;
  padding: 2rem;
}

.panel__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel__head span:first-child {
  font-size: 0.875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
}

.badge {
  background: rgba(6, 182, 212, 0.2);
  color: var(--brand-2);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
}

.bars {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.bar__top {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.bar__top span:first-child {
  color: rgba(255, 255, 255, 0.7);
}

.bar__top span:last-child {
  font-weight: 700;
}

.bar__track {
  margin-top: 0.5rem;
  height: 0.5rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}

.bar__fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  width: 0;
  transition: width 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.quote {
  margin-top: 2rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 1rem;
  padding: 1.25rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.7);
}

.quote b {
  color: #fff;
  font-weight: 600;
}

/* ---------- awards ---------- */
.awards {
  margin-top: 3.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .awards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.award {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--mist);
  border-radius: 1.5rem;
  padding: 2rem;
  transition: transform 0.3s;
}

.award:hover {
  transform: translateY(-4px);
}

.award__year {
  font-size: 3.75rem;
  font-weight: 900;
  letter-spacing: -0.05em;
  color: rgba(37, 99, 235, 0.15);
  line-height: 1;
}

.award__trophy {
  margin-top: 0.5rem;
  font-size: 1.875rem;
}

.award h3 {
  margin: 1rem 0 0;
  font-size: 1.125rem;
  font-weight: 800;
  line-height: 1.4;
}

.award__org {
  margin: 0.5rem 0 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--brand);
}

.award p:last-child {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: rgba(10, 14, 26, 0.6);
}

/* ---------- about ---------- */
.about {
  max-width: 64rem;
  margin: 0 auto;
}

.about__card {
  border-radius: 2rem;
  padding: 2.5rem;
  color: #fff;
  background: linear-gradient(135deg, var(--ink), var(--ink-soft));
}

@media (min-width: 640px) {
  .about__card {
    padding: 4rem;
  }
}

.about__card h2 {
  max-width: 48rem;
  margin: 1rem 0 0;
  font-size: clamp(1.875rem, 4vw, 2.25rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.about__card > p {
  max-width: 48rem;
  margin: 1.5rem 0 0;
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
}

.about__grid {
  margin-top: 2.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .about__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.about__grid > div {
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 1rem;
  padding: 1.5rem;
}

.about__grid .t {
  font-weight: 700;
}

.about__grid .d {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- cta ---------- */
.cta {
  text-align: center;
}

.cta .container {
  position: relative;
  max-width: 48rem;
}

.cta h2 {
  margin: 0;
  font-size: clamp(1.875rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.cta p {
  margin: 1.25rem 0 0;
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.7);
}

.cta__buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.cta__buttons .btn {
  width: 100%;
  padding: 1rem 2rem;
}

@media (min-width: 640px) {
  .cta__buttons {
    flex-direction: row;
  }
  .cta__buttons .btn {
    width: auto;
  }
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  background: #fff;
  padding-block: 3.5rem;
}

.footer__top {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.footer__brand {
  max-width: 24rem;
}

.footer__brand p {
  margin: 1rem 0 0;
  font-size: 0.875rem;
  line-height: 1.6;
  color: rgba(10, 14, 26, 0.55);
}

.footer__cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
}

.footer__cols .t {
  font-size: 0.875rem;
  font-weight: 700;
}

.footer__cols ul {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  font-size: 0.875rem;
  color: rgba(10, 14, 26, 0.55);
}

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

.footer__bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: rgba(10, 14, 26, 0.45);
}

@media (min-width: 640px) {
  .footer__top {
    flex-direction: row;
    justify-content: space-between;
  }
  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- reveal animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .blob {
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .bar__fill {
    transition: none;
  }
}

/* ===================================================================
   corporate sections: pillars / business number / timeline / contact
   =================================================================== */

/* ---------- company pillars ---------- */
.pillars {
  margin-top: 3.5rem;
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .pillars {
    grid-template-columns: repeat(3, 1fr);
  }
}

.pillar {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  padding: 2rem;
  transition: box-shadow 0.3s, transform 0.3s;
}

.pillar:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 60px -34px rgba(10, 14, 26, 0.25);
}

.pillar__num {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--brand);
}

.pillar h3 {
  margin: 1rem 0 0;
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.pillar p {
  margin: 0.75rem 0 0;
  color: rgba(10, 14, 26, 0.6);
  line-height: 1.65;
}

/* ---------- business division number (in art panel) ---------- */
.biz-num {
  position: relative;
  font-size: clamp(4.5rem, 12vw, 7rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.92);
  text-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}

/* ---------- timeline (연혁) ---------- */
.timeline {
  max-width: 52rem;
  margin: 3.5rem auto 0;
}

.tl {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .tl {
    grid-template-columns: 6rem 1fr;
    gap: 1.75rem;
  }
}

.tl__year {
  text-align: right;
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--brand);
  padding-top: 0.1rem;
}

@media (min-width: 640px) {
  .tl__year {
    font-size: 1.75rem;
  }
}

.tl__body {
  position: relative;
  border-left: 2px solid var(--line);
  padding: 0 0 2.5rem 1.75rem;
}

.tl:last-child .tl__body {
  padding-bottom: 0;
}

.tl__body::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 5px;
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--paper);
  border: 3px solid var(--brand);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 12%, transparent);
}

.tl__badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--brand);
  background: color-mix(in srgb, var(--brand) 10%, transparent);
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
}

.tl__title {
  margin-top: 0.65rem;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.tl__org {
  margin-top: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand);
}

.tl__desc {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.6;
  color: rgba(10, 14, 26, 0.6);
}

/* ---------- contact ---------- */
.contact-info {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.contact-info a,
.contact-info div {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 13rem;
  text-align: left;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  border-radius: 1rem;
  padding: 1rem 1.25rem;
  transition: background 0.2s, border-color 0.2s;
}

.contact-info a:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.contact-info__k {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand-2);
}

.contact-info__v {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
}

/* ---------- footer corporate meta ---------- */
.footer__meta {
  margin-top: 1rem !important;
  font-size: 0.8rem !important;
  line-height: 1.7 !important;
  color: rgba(10, 14, 26, 0.45) !important;
}

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

/* ---------- language switcher ---------- */
.lang {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang__globe {
  position: absolute;
  left: 0.6rem;
  font-size: 0.9rem;
  pointer-events: none;
  opacity: 0.75;
}

#langSelect {
  appearance: none;
  -webkit-appearance: none;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(10, 14, 26, 0.12);
  border-radius: 999px;
  padding: 0.5rem 1.7rem 0.5rem 1.9rem;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5 6 7.5 9 4.5' stroke='%230a0e1a' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.6rem center;
  background-size: 0.7rem;
}

#langSelect:hover {
  border-color: rgba(10, 14, 26, 0.25);
}

#langSelect:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}

/* over the dark hero (header not scrolled): light treatment */
.header:not(.scrolled) .lang__globe {
  filter: brightness(0) invert(1);
}

.header:not(.scrolled) #langSelect {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5 6 7.5 9 4.5' stroke='%23ffffff' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* dropdown option list always renders on white in most browsers */
#langSelect option {
  color: #0a0e1a;
  background: #fff;
}

@media (max-width: 380px) {
  #langSelect {
    padding-right: 1.5rem;
    padding-left: 1.7rem;
    font-size: 0.78rem;
  }
}

/* ---------- multilingual mobile safeguards ---------- */
html,
body {
  overflow-x: hidden;
}

.pill {
  max-width: 100%;
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.85rem;
  }
  .hero__lead {
    font-size: 1rem;
  }
  .pill {
    font-size: 0.8rem;
    line-height: 1.4;
  }
}