:root {
  /* 원본(ksc-hpc.imweb.me) 실측값에 맞춤: 본문 rgb(54,54,54), 컨테이너 1280px */
  --ink: #363636;
  --muted: #6f747c;
  --line: #dde0e4;
  --paper: #ffffff;
  --soft: #f4f5f6;
  --navy: #021b35;
  --blue: #009bd8;
  --green: #a8d72a;
  --pink: #c04b9b;
  --content: 1280px;
  --header: 100px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Pretendard, "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  word-break: keep-all;
}

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

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

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

button,
input {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header);
  background: #050505;
  color: #fff;
}

.header-inner {
  width: min(100% - 28px, 1260px);
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
}

.brand {
  width: 92px;
  flex: 0 0 auto;
}

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

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 3vw, 48px);
  margin-left: auto;
}

.nav-group {
  position: relative;
}

.desktop-nav > .nav-group > .nav-parent {
  position: relative;
  display: block;
  padding: 38px 0 34px;
  color: #f0f0f0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}

.desktop-nav > .nav-group > .nav-parent::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 28px;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--pink));
  transition: right .22s ease;
}

.desktop-nav > .nav-group > .nav-parent:hover::after,
.desktop-nav > .nav-group > .nav-parent:focus-visible::after,
.desktop-nav > .nav-group:focus-within > .nav-parent::after {
  right: 0;
}

/* 원본 실측: 흰 패널, radius 3px, 그림자 rgba(0,0,0,.176) 0 6px 12px,
   항목 padding 10px 20px / 13px / #212121. 하위 메뉴는 오른쪽으로 펼쳐진다. */
.desktop-nav .nav-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1100;
  display: none;
  min-width: 160px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 6px 12px rgba(0, 0, 0, .176);
}

.desktop-nav .nav-group:hover .nav-dropdown,
.desktop-nav .nav-group:focus-within .nav-dropdown {
  display: block;
}

.desktop-nav .nav-dropdown a {
  display: block;
  padding: 10px 20px;
  border-radius: 0;
  color: #212121;
  font-size: 13px;
  line-height: 1.45;
  white-space: nowrap;
}

.desktop-nav .nav-dropdown a:hover,
.desktop-nav .nav-dropdown a:focus-visible {
  background: #f5f5f5;
  color: #000;
  outline: none;
}

.desktop-nav .nav-item {
  position: relative;
}

/* 자식이 있는 항목은 오른쪽 화살표를 두고, 공간을 확보한다. */
.desktop-nav .nav-item.has-sub > a {
  padding-right: 34px;
}

.desktop-nav .nav-item.has-sub > a::after {
  content: "›";
  position: absolute;
  top: 50%;
  right: 16px;
  color: #8a8e94;
  font-size: 15px;
  line-height: 1;
  transform: translateY(-50%);
}

.desktop-nav .nav-sub {
  position: absolute;
  top: 0;
  left: 100%;
  display: none;
  min-width: 396px;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 6px 12px rgba(0, 0, 0, .176);
}

.desktop-nav .nav-item:hover > .nav-sub,
.desktop-nav .nav-item:focus-within > .nav-sub {
  display: block;
}

/* 마지막 메뉴는 오른쪽 끝에 있어 왼쪽 정렬하면 화면을 넘친다. */
.desktop-nav .nav-group:last-child .nav-dropdown {
  left: auto;
  right: 0;
}

/* 항목이 많아도 화면 밖으로 나가지 않도록. */
.desktop-nav .nav-dropdown,
.desktop-nav .nav-sub {
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

/* 오른쪽 공간이 부족해지면 하위 메뉴를 왼쪽으로 펼친다. */
@media (max-width: 1400px) {
  .desktop-nav .nav-sub {
    left: auto;
    right: 100%;
  }
}

/* 더 좁아지면 옆으로 펼칠 자리가 없어 목록 안에 들여쓴다. */
@media (max-width: 1180px) {
  .desktop-nav .nav-sub {
    position: static;
    display: block;
    min-width: 0;
    padding-left: 12px;
    border-radius: 0;
    box-shadow: none;
    overflow: visible;
  }

  .desktop-nav .nav-sub a {
    color: #5a5f66;
    font-size: 12px;
  }

  .desktop-nav .nav-item.has-sub > a {
    padding-right: 20px;
  }

  .desktop-nav .nav-item.has-sub > a::after {
    content: none;
  }
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 0;
  background: transparent;
  color: #fff;
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  height: 2px;
  margin: 5px 0;
  background: currentColor;
  transition: transform .2s ease, opacity .2s ease;
}

.mobile-nav {
  position: fixed;
  inset: var(--header) 0 0;
  z-index: 990;
  display: none;
  padding: 28px 26px;
  overflow-y: auto;
  background: rgba(5, 5, 5, .98);
  color: #fff;
}

.mobile-nav a {
  display: block;
  padding: 17px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, .13);
  font-size: 18px;
  font-weight: 700;
}

.mobile-nav .nav-dropdown {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 2px 0 14px 14px;
}

/* 모바일에서는 펼침 없이 하위 항목까지 그대로 보여준다. */
.mobile-nav .nav-item {
  grid-column: 1 / -1;
}

.mobile-nav .nav-sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding-left: 12px;
}

.mobile-nav .nav-dropdown a {
  padding: 8px 7px;
  border: 0;
  color: #aeb4ba;
  font-size: 12px;
  font-weight: 500;
  line-height: 1.35;
}

.hero {
  position: relative;
  min-height: 707px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #011c35 url("../images/hero-desktop-bg.jpg") center / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 17%;
  background: linear-gradient(180deg, transparent, rgba(0, 16, 31, .35));
}

.hero-title {
  position: relative;
  z-index: 1;
  width: min(94%, 1180px);
  margin-top: 6px;
}

.announcement {
  min-height: 92px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 16px 24px;
  background: #101010;
  color: #e8e8e8;
  text-align: center;
  font-size: 14px;
}

.announcement-dots {
  display: flex;
  gap: 8px;
}

.announcement-dots i {
  width: 6px;
  height: 6px;
  border: 1px solid #fff;
  border-radius: 50%;
  opacity: .65;
}

.announcement-dots i:first-child {
  background: #fff;
  opacity: 1;
}

.section {
  padding: 94px 30px;
}

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

.section.dark {
  color: #fff;
  background: var(--navy);
}

.container {
  width: min(100%, var(--content));
  margin: 0 auto;
}

.section-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 60px;
  font-size: clamp(25px, 2.4vw, 34px);
  line-height: 1.1;
  letter-spacing: -.02em;
}

.section-title svg {
  width: 24px;
  height: 24px;
  flex: 0 0 auto;
}

.eyebrow {
  margin: 0 0 18px;
  color: #111;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.gradient-text {
  background: linear-gradient(90deg, var(--blue), var(--green) 55%, var(--pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(280px, .9fr) minmax(360px, 1.35fr);
  align-items: center;
  gap: clamp(42px, 7vw, 100px);
}

.about-image {
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 24px 50px rgba(5, 20, 40, .12);
}

.about-copy h3 {
  margin: 0 0 20px;
  font-size: clamp(23px, 2.2vw, 32px);
  line-height: 1.3;
}

.about-copy p,
.greeting-copy p {
  margin: 0 0 17px;
  color: #363636;
}

.highlights {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 15px;
  align-items: stretch;
}

.highlight-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* 원본은 고정 비율 이미지라 카드 높이가 330px이고 본문 아래 여백이 남는다. */
  min-height: 330px;
  border: 1px solid #e3e5e8;
  border-radius: 10px;
  background: #fff;
}

/* 원본 스트립 이미지(1920x495) 실측을 330px 렌더 기준으로 환산:
   헤더 높이 67px, 본문 시작 104px(헤더 아래 37px), 본문 줄간격 27.3px */
.highlight-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 20px 22px;
  background: #454545;
}

.highlight-head h3 {
  margin: 0;
  color: #fff;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.25;
}

.highlight-count {
  flex: none;
  min-width: 27px;
  padding: 3px 9px;
  border-radius: 999px;
  background: #ededed;
  color: #3a3a3a;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.highlight-card p {
  margin: 0;
  padding: 37px 26px 32px;
  color: #4a4a4a;
  font-size: 15px;
  line-height: 1.82;
  word-break: keep-all;
}

.greeting {
  position: relative;
  overflow: hidden;
}

.greeting::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 100px;
  background: #011b36 url("../images/circuit-strip.png") center / cover no-repeat;
}

.greeting .container {
  position: relative;
  padding-top: 72px;
}

.greeting-panel {
  max-width: 900px;
  margin: 0 auto;
}

.signature {
  margin-top: 34px;
  color: #24272b;
  font-weight: 800;
}

.keynote-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 4vw, 58px);
}

.keynote-card {
  overflow: hidden;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 44px rgba(20, 25, 34, .08);
}

.keynote-card img {
  width: 100%;
}

.program-actions {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  margin: -20px 0 18px;
}

/* 원본 실측: 배경 #363636, 14px, padding 8px 20px, radius 30px, 아이콘 14px + 여백 10px */
.pill-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 8px 20px;
  border: 1px solid #363636;
  border-radius: 30px;
  background: #363636;
  color: #fff;
  font-size: 14px;
  line-height: 1.6;
  transition: background .2s ease, color .2s ease;
}

.pill-button .pill-icon {
  width: 14px;
  height: 14px;
  flex: none;
}

.pill-button:hover,
.pill-button:focus-visible {
  background: #fff;
  color: #363636;
}

.program-tabs {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  margin-bottom: 62px;
  border: 1px solid #d3d5d8;
  border-right: 0;
}

/* 원본 실측: 탭 159x42, padding 10px 2px, 14px/1.6, 줄이 넘치면 두 줄로 감긴다. */
.program-tabs a {
  min-height: 66px;
  display: grid;
  place-items: center;
  padding: 10px 2px;
  border-right: 1px solid #d3d5d8;
  background: #fff;
  text-align: center;
  font-size: 14px;
  line-height: 1.6;
}

.program-tabs a:hover,
.program-tabs a.active {
  background: #050505;
  color: #fff;
}

/* 세부 프로그램 탭. 원본은 알약형(반경 50px, 4px 15px, 13px)에 활성만 검정 배경이다.
   :has()를 못 쓰는 브라우저에서는 위 간격만 넓어질 뿐 배치는 그대로다. */
.program-tabs:has(+ .program-subtabs) {
  margin-bottom: 20px;
}

.program-subtabs {
  margin-bottom: 62px;
  text-align: center;
}

.program-subtabs a {
  display: inline-block;
  margin: 3px 4px;
  padding: 4px 15px;
  border-radius: 50px;
  color: #000;
  font-size: 13px;
  line-height: 1.7;
  transition: background-color .15s ease, color .15s ease;
}

.program-subtabs a:hover {
  background: #ededed;
}

.program-subtabs a.active {
  background: #000;
  color: #fff;
}

.schedule {
  width: 100%;
  border-collapse: collapse;
}

.schedule th,
.schedule td {
  padding: 17px 10px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

.schedule th {
  color: #30343a;
  font-size: 13px;
  letter-spacing: .04em;
}

.schedule th:first-child,
.schedule td:first-child {
  width: 18%;
  min-width: 150px;
}

.schedule-title {
  font-weight: 750;
}

.schedule-detail {
  display: block;
  margin-top: 3px;
  color: #666b72;
  font-size: 14px;
}

.schedule tr.session-row td {
  padding-top: 29px;
  background: #f2f4f5;
  color: #1d4f78;
  font-weight: 800;
}

.talk-trigger {
  position: relative;
  width: 100%;
  padding: 0 42px 0 0;
  border: 0;
  background: transparent;
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.talk-trigger::after {
  content: "+";
  position: absolute;
  top: 1px;
  right: 9px;
  color: #1687bd;
  font-size: 23px;
  font-weight: 400;
  line-height: 1;
  transition: transform .18s ease;
}

.talk-row td {
  transition: background-color .18s ease;
}

.talk-row:hover td,
.talk-row:focus-within td {
  background: #f5fafc;
}

.talk-row:hover .talk-trigger::after,
.talk-trigger:focus-visible::after {
  transform: rotate(90deg);
}

.talk-trigger:focus-visible {
  outline: 2px solid #1687bd;
  outline-offset: 5px;
}

.live-panel {
  position: relative;
  overflow: hidden;
  padding: 80px 30px;
  color: #fff;
  background: #011a34 url("../images/circuit-dark.png") center / cover no-repeat;
}

.live-grid {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 56px;
  align-items: center;
}

.live-copy h3 {
  margin: 0 0 18px;
  font-size: clamp(30px, 4vw, 52px);
}

.live-copy p {
  margin: 0 0 28px;
  color: #cbd9e6;
}

.live-links {
  display: grid;
  gap: 12px;
}

.live-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, .23);
  border-radius: 6px;
  background: rgba(255, 255, 255, .06);
}

.live-link:hover {
  background: rgba(255, 255, 255, .13);
}

.committees-section {
  min-height: 1120px;
  padding: 58px 30px 110px;
  color: #ddd;
  background: #111 url("../images/circuit-dark.png") center top / cover no-repeat;
}

.committees-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 116px;
  color: #eee;
  font-size: 26px;
  line-height: 1;
}

.committees-title img {
  width: 26px;
  height: 26px;
  object-fit: contain;
}

.committee-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 56px;
}

.committee-block + .committee-block {
  margin-top: 68px;
}

.committee-block h3 {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 28px;
  padding-bottom: 15px;
  border-bottom: 1px solid #999;
  color: #ddd;
  font-size: 17px;
  line-height: 1.35;
}

.committee-block h3 img {
  width: 12px;
  height: 15px;
  flex: 0 0 auto;
  object-fit: contain;
}

.committee-block h4 {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 3px;
  color: #ddd;
  font-size: 16px;
  font-weight: 400;
}

.committee-block h4:not(:first-of-type) {
  margin-top: 33px;
}

.committee-block h4 img,
.committee-chair img {
  width: 13px;
  height: 16px;
  flex: 0 0 auto;
  object-fit: contain;
}

.committee-block ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.committee-block li {
  margin-bottom: 2px;
  color: #ddd;
  font-size: 16px;
  line-height: 1.55;
}

.committee-topic-list > li {
  margin-bottom: 24px;
}

.committee-topic,
.committee-chair {
  display: flex;
  align-items: flex-start;
  gap: 7px;
}

.committee-topic img {
  width: 10px;
  height: 13px;
  flex: 0 0 auto;
  margin-top: 5px;
  object-fit: contain;
}

.committee-chair {
  margin-top: 1px;
}

.exhibition-intro {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 70px;
  margin-bottom: 70px;
}

.info-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.info-card h3 {
  margin: 0 0 14px;
  font-size: 20px;
}

.info-card p,
.info-card li {
  color: #565b62;
}

.sponsor-title {
  display: inline-flex;
  margin: 0 0 42px;
  padding: 7px 14px;
  border-radius: 4px;
  background: #33363b;
  color: #fff;
  font-size: 15px;
}

.sponsor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.sponsor-card {
  display: block;
  transition: opacity .2s ease;
}

.sponsor-card:hover {
  opacity: .82;
}

/* 로고 이미지는 카드 테두리·기관명까지 포함된 원본 아트워크라 셀을 꽉 채운다. */
.sponsor-card img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.registration-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 56px;
}

.notice-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.notice-list li {
  position: relative;
  margin-bottom: 13px;
  padding-left: 18px;
  color: #4e535a;
}

.notice-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: #202327;
  font-weight: 800;
}

/* 사전등록 마감은 눌러도 아무 일도 없는 표시용 라벨이다. */
.closed-box {
  display: block;
  width: 100%;
  margin-top: 32px;
  padding: 24px;
  border: 0;
  border-radius: 6px;
  background: #15171a;
  color: #fff;
  text-align: center;
  cursor: default;
}

.contact-card {
  padding: 32px;
  border-radius: 8px;
  background: #f1f3f5;
}

.contact-card h3 {
  margin: 0 0 16px;
}

.contact-card a {
  color: #176da6;
  font-weight: 700;
}

.location-banner {
  position: relative;
  display: block;
  overflow: hidden;
  margin-top: 54px;
  border-radius: 8px;
  background: #111820;
}

.location-banner img {
  width: 100%;
  aspect-ratio: 2.17 / 1;
  object-fit: cover;
  transition: opacity .2s ease, transform .25s ease;
}

.location-banner span {
  position: absolute;
  right: 18px;
  bottom: 18px;
  padding: 9px 13px;
  border-radius: 4px;
  background: rgba(0, 0, 0, .78);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.location-banner:hover img {
  opacity: .88;
  transform: scale(1.01);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.gallery-item {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 1.58 / 1;
  /* button 기본 여백을 지워야 썸네일이 타일을 꽉 채운다. */
  padding: 0;
  border: 0;
  border-radius: 6px;
  background: #e5e7e9;
  cursor: zoom-in;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .28s ease, filter .28s ease;
}

.gallery-item:hover img {
  transform: scale(1.035);
  filter: brightness(.9);
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  place-items: center;
  padding: 28px;
  background: rgba(0, 0, 0, .9);
}

.lightbox.open {
  display: grid;
}

/* 원본이 496px짜리라 max-width만으로는 확대가 전혀 일어나지 않는다.
   너비를 직접 지정해 원본의 2배까지 키우고, 세로는 뷰포트에 맞춘다. */
.lightbox img {
  width: min(992px, 94vw);
  max-width: 94vw;
  max-height: 88vh;
  height: auto;
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 18px;
  right: 20px;
  width: 48px;
  height: 48px;
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 34px;
  cursor: pointer;
}

.talk-modal {
  position: fixed;
  inset: 0;
  z-index: 2100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 30px;
  background: rgba(0, 0, 0, .76);
}

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

.talk-modal-card {
  position: relative;
  width: min(760px, 100%);
  max-height: min(88vh, 900px);
  overflow: auto;
  border-radius: 3px;
  background: #fff;
  box-shadow: 0 24px 80px rgba(0, 0, 0, .32);
}

.talk-modal-close {
  position: sticky;
  top: 0;
  z-index: 2;
  float: right;
  width: 48px;
  height: 48px;
  margin: 10px 10px -58px 0;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, .92);
  color: #222;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
}

.talk-modal-close:hover,
.talk-modal-close:focus-visible {
  background: #f0f2f4;
  outline: 2px solid #1687bd;
}

.talk-modal-layout {
  display: grid;
  grid-template-columns: 195px minmax(0, 1fr);
  gap: 34px;
  padding: 48px 42px 54px;
}

.talk-modal.no-photo .talk-modal-layout {
  grid-template-columns: 1fr;
}

.talk-modal-photo-wrap {
  align-self: start;
  overflow: hidden;
  border-radius: 3px;
  background: #e9ecef;
}

.talk-modal-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.talk-modal-content {
  min-width: 0;
}

.talk-modal-time {
  margin: 0 0 7px;
  color: #1687bd;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .04em;
}

.talk-modal-content h2 {
  margin: 0;
  padding: 0 42px 18px 0;
  border-bottom: 1px solid #dfe3e6;
  color: #18202a;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.35;
}

.talk-modal-speaker {
  margin: 15px 0 24px;
  color: #626870;
  font-size: 14px;
  font-weight: 650;
}

.talk-modal-copy p {
  margin: 0 0 17px;
  color: #3f444a;
  font-size: 14px;
  line-height: 1.72;
  white-space: pre-line;
  word-break: break-word;
}

.talk-modal-copy p:first-child {
  margin-bottom: 8px;
  color: #111820;
  font-size: 20px;
  font-weight: 800;
}

.talk-modal-copy p:nth-child(2) {
  padding: 13px 15px;
  background: #f3f6f8;
  color: #35414c;
  font-size: 13px;
}

.site-footer {
  padding: 54px 30px;
  background: #050505;
  color: #c5c8cc;
}

.footer-inner {
  width: min(100%, var(--content));
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 50px;
}

.footer-logo {
  width: 90px;
  margin-bottom: 22px;
}

.footer-copy p {
  margin: 4px 0;
  font-size: 13px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid #444;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
}

.footer-social a:hover {
  border-color: #fff;
  color: #fff;
}

.page-main {
  min-height: 70vh;
}

.page-hero {
  padding: 94px 30px 40px;
  background: #fff;
}

.page-hero .section-title {
  margin-bottom: 48px;
}

.program-meta {
  margin-bottom: 48px;
  padding: 30px;
  border-left: 4px solid #215f9b;
  background: #f4f6f8;
}

.program-date {
  margin: 0 0 10px;
  color: #626870;
  font-size: 14px;
}

.program-meta h1 {
  margin: 0 0 18px;
  color: #215f9b;
  font-size: clamp(22px, 3vw, 31px);
  line-height: 1.35;
}

.program-description {
  margin: 0 0 20px;
  color: #3f586e;
  white-space: pre-line;
}

.program-chair {
  margin: 0;
  font-weight: 700;
}

.empty-state {
  padding: 44px 24px;
  border: 1px dashed #c7cbd0;
  text-align: center;
  color: #686d73;
}

.about-page-hero {
  padding: 90px 30px;
  color: #fff;
  background: #011b36 url("../images/circuit-dark.png") center / cover no-repeat;
}

.about-page-hero h1 {
  margin: 0;
  font-size: clamp(38px, 7vw, 82px);
}

@media (max-width: 960px) {
  .desktop-nav {
    gap: 19px;
  }

  .desktop-nav a {
    font-size: 12px;
  }

  .hero {
    min-height: 620px;
  }

  .program-tabs {
    grid-template-columns: repeat(4, 1fr);
  }

  .keynote-grid {
    gap: 14px;
  }

  .highlights {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (max-width: 760px) {
  :root {
    --header: 48px;
  }

  body {
    font-size: 15px;
    line-height: 1.7;
  }

  .site-header {
    height: var(--header);
  }

  .header-inner {
    width: min(100% - 20px, 720px);
    justify-content: center;
  }

  .brand {
    width: 76px;
  }

  .desktop-nav {
    display: none;
  }

  .menu-toggle {
    position: absolute;
    right: 5px;
    display: block;
  }

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

  .nav-open .menu-toggle span {
    opacity: 0;
  }

  .nav-open .menu-toggle::before {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-open .menu-toggle::after {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    min-height: 630px;
    background-image: url("../images/hero-mobile-bg.jpg");
    background-position: center top;
  }

  .hero-title {
    width: 100%;
    margin-top: 0;
  }

  .announcement {
    min-height: 97px;
    padding-inline: 36px;
    font-size: 14px;
  }

  .section {
    padding: 68px 18px;
  }

  .section-title {
    margin-bottom: 36px;
    font-size: 26px;
  }

  .about-grid,
  .exhibition-intro,
  .registration-grid,
  .live-grid,
  .committee-columns {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .about-image {
    order: 2;
  }

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

  .keynote-grid {
    grid-template-columns: 1fr;
    max-width: 420px;
    margin: 0 auto;
  }

  .program-actions {
    justify-content: stretch;
    margin-top: 0;
  }

  .program-actions .pill-button {
    flex: 1 1 100%;
  }

  .program-tabs {
    grid-template-columns: 1fr 1fr;
    margin-bottom: 42px;
  }

  .schedule,
  .schedule tbody,
  .schedule tr,
  .schedule td {
    display: block;
    width: 100%;
  }

  .schedule thead {
    display: none;
  }

  .schedule tr {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
  }

  .schedule td,
  .schedule td:first-child {
    width: 100%;
    min-width: 0;
    padding: 2px 0;
    border: 0;
  }

  .schedule td:first-child {
    color: #176da6;
    font-size: 13px;
    font-weight: 800;
  }

  .schedule tr.session-row {
    padding: 0;
    border: 0;
  }

  .schedule tr.session-row td {
    padding: 16px;
  }

  .talk-trigger {
    padding-right: 36px;
  }

  .talk-modal {
    align-items: flex-end;
    padding: 12px;
  }

  .talk-modal-card {
    max-height: 92vh;
    border-radius: 6px;
  }

  .talk-modal-layout {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 40px 24px 42px;
  }

  .talk-modal-photo-wrap {
    width: 118px;
  }

  .talk-modal-content h2 {
    padding-right: 32px;
  }

  .committees-section {
    min-height: 0;
    padding: 47px 15px 72px;
    background-position: center top;
    background-size: auto 100%;
  }

  .committees-title {
    gap: 10px;
    margin-bottom: 76px;
    font-size: 20px;
  }

  .committees-title img {
    width: 24px;
    height: 24px;
  }

  .committee-columns {
    gap: 16px;
    margin-right: -15px;
    margin-left: -15px;
  }

  .committee-block {
    padding: 0 15px 34px;
    background: rgba(42, 42, 42, .96);
  }

  .committee-block + .committee-block {
    margin-top: 16px;
  }

  .committee-block h3 {
    margin: 0 -15px 26px;
    padding: 17px 15px 13px;
    border-bottom-color: #999;
    background: rgba(18, 18, 18, .7);
    font-size: 16px;
  }

  .committee-block h4,
  .committee-block li {
    font-size: 15px;
  }

  .committee-block h4:not(:first-of-type) {
    margin-top: 31px;
  }

  .committee-topic-list > li {
    margin-bottom: 24px;
  }

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

  .footer-inner {
    flex-direction: column;
  }

  .page-hero {
    padding: 60px 18px 26px;
  }

  .program-meta {
    padding: 22px 20px;
  }
}

@media (max-width: 430px) {
  .highlights {
    grid-template-columns: 1fr;
  }

  .gallery-grid {
    gap: 8px;
  }

  .gallery-item {
    border-radius: 4px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
  }
}

/* Full-fidelity KSC2024 archive layout */
@font-face {
  font-family: "Plipop-Social-Icons";
  src: url("../fonts/Plipop-Social-Icons.woff") format("woff");
  font-style: normal;
  font-weight: normal;
  font-display: block;
}

.ii {
  font-family: "Plipop-Social-Icons" !important;
  font-style: normal;
  font-weight: normal;
  font-variant: normal;
  line-height: 1;
  text-transform: none;
}

.ii-facebook-rn::before { content: "\a109"; }
.ii-nblog-rn::before { content: "\a123"; }
.ii-youtube-rn::before { content: "\a141"; }

.section {
  padding: 58px 30px 96px;
}

.section-title {
  gap: 10px;
  margin-bottom: 58px;
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.03em;
}

.section-title img {
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
  object-fit: contain;
}

#about .about-grid {
  grid-template-columns: 403px minmax(0, 1fr);
  align-items: center;
  gap: 52px;
}

#about .about-image {
  overflow: visible;
  aspect-ratio: 403 / 268;
  border-radius: 0;
  box-shadow: none;
}

#about .about-image img {
  width: 100%;
}

#about .about-copy h3 {
  margin: 0 0 22px;
  font-size: 18px;
  line-height: 1.5;
}

#about .about-copy p {
  margin-bottom: 18px;
  color: #333;
  font-size: 15px;
  line-height: 1.8;
}

#about .about-grid + .section-title {
  margin-top: 72px;
  margin-bottom: 34px;
}

.greeting {
  padding-top: 58px;
  background: #fff;
}

.greeting::before {
  display: none;
}

.greeting .container {
  padding-top: 0;
}

.greeting-panel {
  max-width: none;
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  align-items: start;
  gap: 48px;
  margin: 0;
}

.greeting-portrait {
  width: 250px;
  aspect-ratio: 640 / 750;
  height: auto;
  object-fit: cover;
}

.greeting-copy p {
  margin: 0 0 18px;
  color: #333;
  font-size: 15px;
  line-height: 1.75;
}

.signature {
  margin-top: 32px;
  color: #222;
  font-size: 16px;
  line-height: 1.7;
}

.keynote-card {
  aspect-ratio: 670 / 1081;
  border-radius: 0;
  box-shadow: none;
}

.keynote-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.live-panel {
  padding: 58px 30px 96px;
  color: #222;
  background: #fff;
}

.live-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 370px;
  align-items: center;
  gap: 52px;
  margin-bottom: 48px;
}

.live-notices p {
  margin: 0 0 14px;
  font-weight: 700;
}

.live-notices .live-alert {
  color: #f00;
}

.live-banner {
  width: 100%;
  aspect-ratio: 994 / 288;
  object-fit: contain;
}

.live-day + .live-day {
  margin-top: 54px;
}

.live-day h3 {
  margin: 0 0 18px;
  font-size: 18px;
}

.live-day h3 span {
  margin: 0 9px;
  color: #aaa;
}

.live-schedule {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.live-schedule th,
.live-schedule td {
  padding: 16px 18px;
  border: 0;
  border-bottom: 1px solid #d8d8d8;
  text-align: center;
  vertical-align: middle;
}

.live-schedule th {
  background: #f5f5f5;
  font-size: 13px;
}

.live-schedule th:first-child,
.live-schedule td:first-child {
  width: 17%;
}

.live-schedule th:last-child,
.live-schedule td:last-child {
  width: 15%;
}

.live-schedule td:nth-child(2) {
  text-align: left;
}

.live-schedule td strong,
.live-schedule td span {
  display: block;
}

.live-schedule td span {
  margin-top: 5px;
  color: #666;
  font-size: 14px;
}

.live-schedule a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0;
  background: transparent;
  color: #222;
  font-size: 13px;
  font-weight: 700;
}

.live-schedule a .ii {
  font-size: 18px;
}

.exhibition-section {
  background: #fff;
}

.section-label {
  display: inline-block;
  margin: 0 0 24px;
  padding: 7px 14px;
  border-radius: 3px;
  background: #2f3033;
  color: #fff;
  font-size: 15px;
  line-height: 1.25;
}

.exhibition-copy {
  margin: 0 0 58px;
  color: #333;
  font-size: 15px;
  line-height: 1.9;
}

.exhibition-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 62px;
  margin-bottom: 70px;
}

.plain-bullets {
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-bullets li {
  position: relative;
  margin-bottom: 9px;
  padding-left: 14px;
  color: #333;
  font-size: 15px;
  line-height: 1.75;
}

.plain-bullets li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: currentColor;
}

.plain-bullets a,
.location-copy a,
.registration-contact a {
  color: inherit;
  text-decoration: none;
}

.sponsor-title {
  margin-bottom: 36px;
}

.sponsor-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px 24px;
}

.registration-section {
  background: #f5f5f5;
}

.registration-grid {
  grid-template-columns: 1fr 1fr;
  gap: 64px;
}

.registration-list li {
  margin-bottom: 8px;
}

.registration-list .red,
.red {
  color: #f00;
}

.registration-list .blue,
.blue {
  color: #1559d6;
}

.registration-office {
  margin: 26px 0 10px;
  font-weight: 700;
}

.registration-contact {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 6px 0;
}

.registration-contact img {
  width: 18px;
  height: 18px;
  object-fit: contain;
}

.registration-close {
  margin-top: 54px;
  text-align: center;
}

.registration-close .closed-box {
  display: inline-flex;
  width: auto;
  min-width: 230px;
  justify-content: center;
  margin: 0;
  padding: 14px 36px;
  border-radius: 3px;
  background: #555;
  cursor: default;
}

.registration-close .talk-trigger::after {
  display: none;
}

.registration-close p {
  margin: 15px 0 0;
  color: #555;
  font-size: 13px;
}

.contact-location {
  padding-bottom: 52px;
  background: #fff;
}

.location-banner {
  margin-top: 0;
  aspect-ratio: 1920 / 885;
  border-radius: 0;
  background: transparent;
}

.location-banner img {
  aspect-ratio: auto;
  object-fit: contain;
  transition: none;
}

.location-banner:hover img {
  opacity: 1;
  transform: none;
}

.location-copy {
  margin-top: 24px;
  text-align: center;
}

.location-copy p {
  margin: 4px 0;
  color: #333;
  font-size: 14px;
}

.gallery-section {
  padding-top: 42px;
  background: #fff;
}

.gallery-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 6px;
}

.gallery-item {
  border-radius: 0;
}

.site-footer {
  padding: 34px 30px 52px;
  background: #050505;
  color: #aaa;
}

.footer-inner {
  display: block;
  text-align: center;
}

.footer-social {
  justify-content: center;
  gap: 18px;
  margin-bottom: 30px;
}

.footer-social a {
  width: auto;
  height: auto;
  border: 0;
  border-radius: 0;
  color: #999;
  font-size: 28px;
}

.footer-details {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  align-items: center;
  gap: 42px;
  max-width: 930px;
  margin: 0 auto;
  text-align: left;
}

.footer-logo {
  width: 340px;
  margin: 0;
}

.footer-copy p {
  margin: 3px 0;
  font-size: 12px;
  line-height: 1.55;
}

@media (max-width: 760px) {
  .section {
    padding: 45px 15px 64px;
  }

  .section-title {
    gap: 8px;
    margin-bottom: 40px;
    font-size: 20px;
  }

  .section-title img {
    width: 23px;
    height: 23px;
  }

  #about .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  #about .about-image {
    order: 0;
  }

  #about .about-copy h3 {
    font-size: 16px;
  }

  #about .about-copy p,
  .greeting-copy p,
  .exhibition-copy,
  .plain-bullets li {
    font-size: 14px;
  }

  #about .about-grid + .section-title {
    margin-top: 54px;
    margin-bottom: 28px;
  }

  .highlights {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  /* 원본은 모바일에서 이 섹션을 노출하지 않았다. 좁은 화면에서는 내용 높이에 맞춘다. */
  .highlight-card {
    min-height: 0;
  }

  .greeting-panel {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .greeting-portrait {
    width: min(100%, 320px);
    margin: 0 auto;
  }

  .live-intro,
  .exhibition-details,
  .registration-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .live-intro {
    margin-bottom: 38px;
  }

  .live-day h3 {
    font-size: 15px;
    line-height: 1.5;
  }

  .live-schedule,
  .live-schedule tbody,
  .live-schedule tr,
  .live-schedule td {
    display: block;
    width: 100%;
  }

  .live-schedule thead {
    display: none;
  }

  .live-schedule tr {
    margin-bottom: 12px;
    border: 1px solid #ddd;
  }

  .live-schedule td,
  .live-schedule td:first-child,
  .live-schedule td:last-child,
  .live-schedule td:nth-child(2) {
    width: 100%;
    padding: 11px 12px;
    border: 0;
    border-bottom: 1px solid #eee;
    text-align: left;
  }

  .live-schedule td:last-child {
    border-bottom: 0;
  }

  .sponsor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .registration-close .closed-box {
    width: 100%;
    min-width: 0;
  }

  .contact-location {
    padding-bottom: 36px;
  }

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

  .site-footer {
    padding: 30px 18px 42px;
  }

  .footer-details {
    grid-template-columns: 1fr;
    gap: 20px;
    text-align: center;
  }

  .footer-logo {
    width: min(100%, 340px);
    margin: 0 auto;
  }
}

/* 최소 폭에서는 하이라이트 카드를 1열로 세운다. 앞선 760px 규칙보다 뒤에 와야 적용된다. */
@media (max-width: 430px) {
  .highlights {
    grid-template-columns: 1fr;
  }
}

/* 원본 실측: 기조연설 카드 위 캡션 — 21px, 요일 부분만 볼드, #222, 가운데 정렬 */
.keynote-day {
  display: block;
  margin-bottom: 16px;
  color: #222;
  font-size: 21px;
  font-weight: 400;
  line-height: 1.4;
  text-align: center;
}

.keynote-day strong {
  font-weight: 700;
}

@media (max-width: 760px) {
  .keynote-day {
    font-size: 18px;
  }
}