@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@500;600;700&display=swap");

:root {
  --bg: #ffffff;
  --surface: #f3f6f8;
  --surface-strong: #eaf0f3;
  --surface-warm: #f6f3ed;
  --ink: #13202b;
  --muted: #617180;
  --line: #d9e1e7;
  --line-strong: #bccbd4;
  --primary: #0b3558;
  --primary-strong: #072a48;
  --accent: #089bc2;
  --accent-strong: #087fa0;
  --accent-soft: #dff4f8;
  --white: #ffffff;
  --focus: #e2a43a;
  --shadow: 0 16px 40px rgba(11, 53, 88, 0.1);
  --header-height: 118px;
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: Pretendard, "Noto Sans KR", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

body.menu-open,
body.modal-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
blockquote {
  margin-top: 0;
}

h1,
h2,
h3,
h4 {
  line-height: 1.25;
  word-break: keep-all;
}

p,
li {
  word-break: keep-all;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--white);
  background: var(--primary);
}

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

.container {
  width: min(100%, 1200px);
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 40px);
}

.section {
  padding-block: 96px;
}

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

.section--warm {
  background: var(--surface-warm);
}

.section--compact {
  padding-block: 64px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 800;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: var(--accent);
  content: "";
}

.section-heading {
  max-width: 760px;
  margin-bottom: 42px;
}

.section-heading h2 {
  margin-bottom: 14px;
  font-size: 42px;
  font-weight: 750;
}

.section-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 18px;
}

.section-heading--row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
}

.section-heading--row > div {
  max-width: 760px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 750;
  cursor: pointer;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

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

.button--primary {
  color: var(--white);
  background: var(--accent-strong);
}

.button--primary:hover {
  background: #076f8c;
}

.button--light {
  color: var(--primary);
  background: var(--white);
}

.button--light:hover {
  background: var(--accent-soft);
}

.button--outline {
  border-color: var(--line-strong);
  background: transparent;
}

.button--outline:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.button--ghost {
  color: var(--primary);
  background: transparent;
}

.button--ghost:hover {
  background: var(--surface-strong);
}

.button svg,
.icon-button svg,
.text-link svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.icon-button {
  display: inline-grid;
  width: 48px;
  height: 48px;
  place-items: center;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  cursor: pointer;
}

.icon-button:hover {
  color: var(--accent-strong);
  border-color: var(--accent);
}

.text-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 7px;
  color: var(--primary);
  font-weight: 750;
}

.text-link:hover {
  color: var(--accent-strong);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: var(--white);
  box-shadow: 0 1px 0 var(--line);
}

.site-header.is-scrolled {
  box-shadow: 0 10px 28px rgba(7, 42, 72, 0.09);
}

.utility-bar {
  height: 34px;
  color: rgba(255, 255, 255, 0.84);
  background: var(--primary);
  font-size: 12px;
}

.utility-bar .container {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.utility-address,
.utility-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.utility-links a {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
}

.utility-links a:hover {
  color: var(--white);
}

.main-nav {
  height: 84px;
}

.main-nav .container {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: block;
  flex: 0 1 355px;
  max-width: 355px;
}

.brand img {
  width: 100%;
  height: auto;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.desktop-nav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding-inline: 13px;
  color: #263743;
  font-size: 15px;
  font-weight: 700;
}

.desktop-nav a::after {
  position: absolute;
  right: 13px;
  bottom: 5px;
  left: 13px;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.desktop-nav a:hover::after,
.desktop-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.desktop-nav a[aria-current="page"] {
  color: var(--accent-strong);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.menu-toggle {
  display: none;
}

.mobile-nav {
  display: none;
}

.home-hero {
  position: relative;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: var(--white);
  background-color: var(--primary);
  background-image: url("assets/event-2023-technet.jpg");
  background-position: center 44%;
  background-size: cover;
}

.home-hero::before {
  position: absolute;
  inset: 0;
  background: rgba(5, 28, 48, 0.7);
  content: "";
}

.home-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 8px;
  background: var(--accent);
  content: "";
}

.home-hero .container {
  position: relative;
  z-index: 1;
  padding-block: 88px 104px;
}

.hero-content {
  max-width: 800px;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-size: 15px;
  font-weight: 800;
}

.hero-label::before {
  width: 36px;
  height: 3px;
  background: var(--accent);
  content: "";
}

.home-hero h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: 60px;
  font-weight: 750;
}

.home-hero p {
  max-width: 680px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-source {
  position: absolute;
  right: clamp(20px, 5vw, 40px);
  bottom: 24px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
}

.announcement-band {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.announcement-band .container {
  display: grid;
  min-height: 88px;
  grid-template-columns: auto minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 20px;
}

.announcement-label {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  gap: 8px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 800;
}

.announcement-title {
  min-width: 0;
  overflow: hidden;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.announcement-date {
  color: var(--muted);
  font-size: 14px;
}

.trust-band {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.trust-item {
  display: flex;
  min-height: 104px;
  align-items: center;
  gap: 16px;
  padding: 22px 28px;
  border-right: 1px solid var(--line);
}

.trust-item:first-child {
  border-left: 1px solid var(--line);
}

.trust-icon,
.role-icon,
.benefit-icon {
  display: grid;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: 8px;
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.trust-icon svg,
.role-icon svg,
.benefit-icon svg {
  width: 23px;
  height: 23px;
}

.trust-item strong {
  display: block;
  margin-bottom: 2px;
  color: var(--primary);
  font-size: 18px;
}

.trust-item span {
  color: var(--muted);
  font-size: 14px;
}

.role-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.role-card {
  min-height: 300px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.role-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.role-card h3 {
  margin: 24px 0 12px;
  font-size: 24px;
}

.role-card p {
  margin-bottom: 18px;
  color: var(--muted);
}

.role-card ul {
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.role-card li {
  position: relative;
  padding: 5px 0 5px 16px;
  color: #3d4d58;
  font-size: 14px;
}

.role-card li::before {
  position: absolute;
  top: 15px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
}

.event-feature-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
  gap: 18px;
}

.event-feature {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  border-radius: 8px;
  background: var(--primary);
}

.event-feature img {
  width: 100%;
  height: 100%;
  min-height: 540px;
  object-fit: cover;
}

.event-feature::after {
  position: absolute;
  inset: 0;
  background: rgba(4, 27, 47, 0.54);
  content: "";
}

.event-feature__content {
  position: absolute;
  z-index: 1;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 34px;
  color: var(--white);
}

.event-feature__meta,
.event-card__meta,
.archive-card__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
}

.event-feature__meta {
  color: rgba(255, 255, 255, 0.78);
}

.event-feature h3 {
  max-width: 700px;
  margin-bottom: 12px;
  font-size: 36px;
}

.event-feature p {
  max-width: 650px;
  margin-bottom: 20px;
  color: rgba(255, 255, 255, 0.82);
}

.event-stack {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 18px;
}

.event-card {
  display: grid;
  min-height: 261px;
  grid-template-columns: 44% 1fr;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.event-card__image {
  min-height: 100%;
  overflow: hidden;
}

.event-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.event-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 22px;
}

.event-card h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.event-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.content-board {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
}

.news-list {
  border-top: 2px solid var(--primary);
}

.news-row {
  display: grid;
  min-height: 88px;
  grid-template-columns: 90px minmax(0, 1fr) 110px;
  align-items: center;
  gap: 18px;
  border-bottom: 1px solid var(--line);
}

.news-row:hover .news-title {
  color: var(--accent-strong);
}

.tag {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  justify-content: center;
  padding: 4px 9px;
  border-radius: 999px;
  color: var(--accent-strong);
  background: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
}

.tag--neutral {
  color: #475862;
  background: var(--surface-strong);
}

.news-title {
  min-width: 0;
  font-weight: 700;
  transition: color 180ms ease;
}

.news-date {
  color: var(--muted);
  font-size: 14px;
  text-align: right;
}

.resource-links {
  display: grid;
  gap: 10px;
}

.resource-link {
  display: grid;
  min-height: 86px;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.resource-link:hover {
  border-color: var(--accent);
}

.resource-link__icon {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border-radius: 8px;
  color: var(--primary);
  background: var(--surface);
}

.resource-link strong {
  display: block;
}

.resource-link span {
  color: var(--muted);
  font-size: 13px;
}

.membership-band {
  color: var(--white);
  background: var(--primary);
}

.membership-band .container {
  display: grid;
  min-height: 280px;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: center;
  gap: 64px;
}

.membership-copy h2 {
  margin-bottom: 16px;
  font-size: 40px;
}

.membership-copy p {
  max-width: 720px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.membership-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 10px;
}

.site-footer {
  padding-block: 54px 26px;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(260px, 380px) 1fr;
  gap: 72px;
  align-items: start;
}

.footer-brand img {
  width: min(100%, 330px);
}

.footer-brand p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 34px;
}

.footer-info h3 {
  margin-bottom: 8px;
  font-size: 14px;
}

.footer-info p,
.footer-info a {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-bottom {
  display: flex;
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 12px;
}

.footer-bottom nav {
  display: flex;
  gap: 16px;
}

.sub-hero {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: end;
  overflow: hidden;
  color: var(--white);
  background-color: var(--primary);
  background-position: center;
  background-size: cover;
}

.sub-hero::before {
  position: absolute;
  inset: 0;
  background: rgba(5, 31, 53, 0.73);
  content: "";
}

.sub-hero--about {
  background-image: url("assets/event-2021-cyber.jpg");
  background-position: center 42%;
}

.sub-hero--archive {
  background-image: url("assets/event-2023-new-tech.jpeg");
  background-position: center 35%;
}

.sub-hero--member {
  background-image: url("assets/hero-mou.png");
  background-position: center 42%;
}

.sub-hero .container {
  position: relative;
  z-index: 1;
  padding-block: 76px 58px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
}

.breadcrumb svg {
  width: 14px;
  height: 14px;
}

.sub-hero h1 {
  max-width: 800px;
  margin-bottom: 14px;
  font-size: 48px;
}

.sub-hero p {
  max-width: 680px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

.greeting-layout {
  display: grid;
  grid-template-columns: minmax(260px, 0.62fr) minmax(0, 1.38fr);
  gap: 72px;
  align-items: start;
}

.greeting-aside {
  position: sticky;
  top: 150px;
}

.greeting-aside__mark {
  display: grid;
  width: 84px;
  height: 84px;
  place-items: center;
  margin-bottom: 26px;
  border-radius: 8px;
  color: var(--white);
  background: var(--primary);
}

.greeting-aside__mark svg {
  width: 38px;
  height: 38px;
}

.greeting-aside h2 {
  margin-bottom: 10px;
  font-size: 28px;
}

.greeting-aside p {
  color: var(--muted);
}

.greeting-copy blockquote {
  margin-bottom: 32px;
  color: var(--primary);
  font-family: "Noto Serif KR", serif;
  font-size: 34px;
  font-weight: 600;
  line-height: 1.5;
}

.greeting-copy p {
  margin-bottom: 20px;
  color: #354651;
  font-size: 17px;
}

.signature {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  text-align: right;
}

.signature span {
  color: var(--muted);
  font-size: 14px;
}

.signature strong {
  display: block;
  color: var(--primary);
  font-family: "Noto Serif KR", serif;
  font-size: 24px;
}

.mission-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: start;
}

.mission-statement {
  color: var(--primary);
  font-family: "Noto Serif KR", serif;
  font-size: 34px;
  font-weight: 600;
  line-height: 1.55;
}

.mission-points {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--primary);
}

.mission-point {
  display: grid;
  min-height: 118px;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 20px;
  padding-block: 24px;
  border-bottom: 1px solid var(--line);
}

.mission-point__icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: 8px;
  color: var(--accent-strong);
  background: var(--accent-soft);
}

.mission-point h3 {
  margin-bottom: 6px;
  font-size: 20px;
}

.mission-point p {
  margin-bottom: 0;
  color: var(--muted);
}

.timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 116px;
  width: 1px;
  background: var(--line-strong);
  content: "";
}

.timeline-row {
  position: relative;
  display: grid;
  min-height: 108px;
  grid-template-columns: 90px 1fr;
  gap: 52px;
  padding-block: 18px;
}

.timeline-row::before {
  position: absolute;
  top: 33px;
  left: 111px;
  width: 11px;
  height: 11px;
  border: 3px solid var(--white);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  content: "";
}

.timeline-year {
  color: var(--primary);
  font-size: 24px;
  font-weight: 800;
}

.timeline-content h3 {
  margin-bottom: 6px;
  font-size: 19px;
}

.timeline-content p {
  margin-bottom: 0;
  color: var(--muted);
}

.center-grid,
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.center-card,
.benefit-card {
  min-height: 248px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.center-card h3,
.benefit-card h3 {
  margin: 22px 0 10px;
  font-size: 22px;
}

.center-card p,
.benefit-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.archive-toolbar {
  display: grid;
  grid-template-columns: minmax(280px, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-bottom: 26px;
}

.search-field {
  position: relative;
}

.search-field svg {
  position: absolute;
  top: 50%;
  left: 17px;
  width: 20px;
  height: 20px;
  color: var(--muted);
  transform: translateY(-50%);
}

.search-field input {
  width: 100%;
  height: 52px;
  padding: 0 18px 0 50px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--ink);
  background: var(--white);
}

.search-field input:focus {
  border-color: var(--accent);
}

.filter-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 4px;
  border-radius: 8px;
  background: var(--surface-strong);
}

.filter-button {
  min-height: 44px;
  padding: 8px 14px;
  border: 0;
  border-radius: 6px;
  color: var(--muted);
  background: transparent;
  font-size: 14px;
  font-weight: 750;
  cursor: pointer;
}

.filter-button:hover,
.filter-button.is-active {
  color: var(--primary);
  background: var(--white);
  box-shadow: 0 2px 8px rgba(11, 53, 88, 0.08);
}

.archive-meta-row {
  display: flex;
  margin-bottom: 20px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 14px;
}

.archive-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.archive-card {
  display: flex;
  min-height: 410px;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.archive-card[hidden] {
  display: none;
}

.archive-card__image {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-strong);
}

.archive-card__image--symbol {
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--primary);
}

.archive-card__image--symbol svg {
  width: 54px;
  height: 54px;
  color: var(--accent);
}

.archive-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 240ms ease;
}

.archive-card:hover .archive-card__image img {
  transform: scale(1.025);
}

.archive-card__body {
  display: flex;
  min-height: 206px;
  flex: 1;
  flex-direction: column;
  padding: 22px;
}

.archive-card h2 {
  margin-bottom: 10px;
  font-size: 20px;
}

.archive-card p {
  display: -webkit-box;
  overflow: hidden;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.archive-open {
  margin-top: auto;
  align-self: flex-start;
  padding: 0;
  border: 0;
  background: transparent;
}

.no-results {
  display: none;
  min-height: 220px;
  place-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  text-align: center;
}

.no-results.is-visible {
  display: grid;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: none;
  padding: 24px;
  align-items: center;
  justify-content: center;
  background: rgba(5, 24, 41, 0.72);
}

.modal.is-open {
  display: flex;
}

.modal-panel {
  width: min(100%, 680px);
  max-height: calc(100vh - 48px);
  overflow: auto;
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 28px 80px rgba(4, 28, 48, 0.28);
}

.modal-header {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px 12px 24px;
  border-bottom: 1px solid var(--line);
}

.modal-header strong {
  color: var(--primary);
  font-size: 15px;
}

.modal-content {
  padding: 30px;
}

.modal-content h2 {
  margin-bottom: 12px;
  font-size: 30px;
}

.modal-content p {
  color: #3d4d58;
}

.modal-details {
  display: grid;
  margin-top: 26px;
  border-top: 1px solid var(--line);
}

.modal-detail {
  display: grid;
  min-height: 54px;
  grid-template-columns: 100px 1fr;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
}

.modal-detail dt {
  color: var(--muted);
}

.modal-detail dd {
  margin: 0;
  font-weight: 700;
}

.member-types {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.member-type {
  min-height: 300px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.member-type h2 {
  margin: 20px 0 12px;
  font-size: 28px;
}

.member-type p {
  color: var(--muted);
}

.member-type ul {
  margin: 22px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.member-type li {
  position: relative;
  padding: 6px 0 6px 22px;
}

.member-type li::before {
  position: absolute;
  top: 12px;
  left: 0;
  color: var(--accent-strong);
  content: "✓";
  font-weight: 900;
}

.process-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 2px solid var(--primary);
}

.process-step {
  position: relative;
  min-height: 230px;
  padding: 30px 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.process-step:first-child {
  border-left: 1px solid var(--line);
}

.process-step__number {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  margin-bottom: 24px;
  border-radius: 50%;
  color: var(--white);
  background: var(--primary);
  font-size: 14px;
  font-weight: 800;
}

.process-step h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.process-step p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}

.contact-band {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface-warm);
}

.contact-band .container {
  display: grid;
  min-height: 250px;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 56px;
}

.contact-band h2 {
  margin-bottom: 12px;
  font-size: 36px;
}

.contact-band p {
  margin-bottom: 0;
  color: var(--muted);
}

.contact-details {
  display: grid;
  gap: 10px;
  min-width: 290px;
}

.contact-row {
  display: grid;
  min-height: 52px;
  grid-template-columns: 44px 1fr;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.contact-row svg {
  width: 20px;
  height: 20px;
  color: var(--accent-strong);
}

.contact-row span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.contact-row strong {
  color: var(--primary);
  font-size: 15px;
}

@media (max-width: 1080px) {
  .desktop-nav,
  .nav-actions .button {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .brand {
    flex-basis: 330px;
    max-width: 330px;
  }

  .mobile-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 75;
    display: block;
    visibility: hidden;
    overflow-y: auto;
    padding: 18px clamp(20px, 5vw, 40px) 40px;
    background: var(--white);
    opacity: 0;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }

  body.menu-open .mobile-nav {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .mobile-nav nav {
    display: grid;
    border-top: 2px solid var(--primary);
  }

  .mobile-nav nav a {
    display: flex;
    min-height: 58px;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line);
    color: var(--primary);
    font-size: 17px;
    font-weight: 750;
  }

  .mobile-nav nav a::after {
    content: "→";
  }

  .mobile-nav__contact {
    display: grid;
    gap: 8px;
    margin-top: 24px;
  }

  .home-hero h1 {
    font-size: 52px;
  }

  .event-feature-grid {
    grid-template-columns: 1fr;
  }

  .event-stack {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: none;
  }

  .event-card {
    grid-template-columns: 1fr;
  }

  .event-card__image {
    min-height: 200px;
  }

  .content-board {
    grid-template-columns: 1fr;
  }

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

  .footer-main {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

@media (max-width: 800px) {
  :root {
    --header-height: 104px;
  }

  .section {
    padding-block: 72px;
  }

  .section--compact {
    padding-block: 54px;
  }

  .section-heading h2 {
    font-size: 36px;
  }

  .section-heading--row {
    align-items: start;
    flex-direction: column;
  }

  .utility-bar {
    height: 30px;
  }

  .utility-address span {
    display: none;
  }

  .utility-address::before {
    content: "국방정보통신협회";
    font-weight: 700;
  }

  .utility-links a:first-child {
    display: none;
  }

  .main-nav {
    height: 74px;
  }

  .brand {
    flex-basis: 270px;
    max-width: 270px;
  }

  .home-hero {
    min-height: 560px;
  }

  .home-hero .container {
    padding-block: 72px 88px;
  }

  .home-hero h1 {
    font-size: 46px;
  }

  .home-hero p {
    font-size: 17px;
  }

  .announcement-band .container {
    min-height: 102px;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 12px;
  }

  .announcement-date {
    display: none;
  }

  .trust-grid,
  .role-grid,
  .benefit-grid,
  .process-list {
    grid-template-columns: 1fr;
  }

  .trust-item,
  .trust-item:first-child {
    min-height: 92px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }

  .role-card {
    min-height: 0;
  }

  .event-stack {
    grid-template-columns: 1fr;
  }

  .news-row {
    grid-template-columns: 74px minmax(0, 1fr);
  }

  .news-date {
    display: none;
  }

  .membership-band .container,
  .contact-band .container {
    min-height: 0;
    grid-template-columns: 1fr;
    gap: 30px;
    padding-block: 64px;
  }

  .membership-copy h2 {
    font-size: 34px;
  }

  .footer-info {
    grid-template-columns: 1fr;
  }

  .sub-hero {
    min-height: 320px;
  }

  .sub-hero h1 {
    font-size: 42px;
  }

  .greeting-layout,
  .mission-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .greeting-aside {
    position: static;
  }

  .greeting-copy blockquote,
  .mission-statement {
    font-size: 29px;
  }

  .center-grid,
  .member-types {
    grid-template-columns: 1fr;
  }

  .archive-toolbar {
    grid-template-columns: 1fr;
  }

  .filter-group {
    width: 100%;
  }

  .filter-button {
    flex: 1 1 auto;
  }

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

  .archive-card {
    min-height: 0;
  }

  .process-step,
  .process-step:first-child {
    min-height: 0;
    border-left: 1px solid var(--line);
  }

  .contact-details {
    min-width: 0;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .container {
    padding-inline: 20px;
  }

  .section {
    padding-block: 64px;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2 {
    font-size: 31px;
  }

  .section-heading p {
    font-size: 16px;
  }

  .brand {
    flex-basis: 225px;
    max-width: 225px;
  }

  .home-hero {
    min-height: 540px;
    background-position: 44% center;
  }

  .home-hero h1 {
    font-size: 38px;
  }

  .hero-label {
    font-size: 13px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-source {
    right: 20px;
    bottom: 18px;
  }

  .announcement-band .container {
    min-height: 112px;
    grid-template-columns: 1fr auto;
  }

  .announcement-label {
    grid-column: 1 / -1;
    align-self: end;
  }

  .announcement-title {
    align-self: start;
  }

  .trust-item {
    padding-inline: 20px;
  }

  .event-feature,
  .event-feature img {
    min-height: 470px;
  }

  .event-feature__content {
    padding: 24px;
  }

  .event-feature h3 {
    font-size: 29px;
  }

  .event-card {
    min-height: 0;
  }

  .event-card__image {
    min-height: 190px;
  }

  .membership-copy h2 {
    font-size: 30px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }

  .sub-hero {
    min-height: 300px;
  }

  .sub-hero .container {
    padding-block: 60px 46px;
  }

  .sub-hero h1 {
    font-size: 36px;
  }

  .sub-hero p {
    font-size: 16px;
  }

  .greeting-copy blockquote,
  .mission-statement {
    font-size: 26px;
  }

  .timeline::before {
    left: 79px;
  }

  .timeline-row {
    grid-template-columns: 62px 1fr;
    gap: 34px;
  }

  .timeline-row::before {
    left: 74px;
  }

  .timeline-year {
    font-size: 20px;
  }

  .archive-meta-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .modal {
    padding: 12px;
  }

  .modal-panel {
    max-height: calc(100vh - 24px);
  }

  .modal-content {
    padding: 24px 20px;
  }

  .modal-content h2 {
    font-size: 26px;
  }

  .modal-detail {
    grid-template-columns: 78px 1fr;
  }

  .member-type,
  .center-card,
  .benefit-card {
    padding: 24px;
  }

  .contact-band h2 {
    font-size: 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}