:root {
  color-scheme: light;
  --ink: #121723;
  --muted: #5d6573;
  --paper: #f7f4ec;
  --surface: #ffffff;
  --night: #111722;
  --gold: #d7a93a;
  --gold-deep: #a97717;
  --red: #aa242d;
  --red-deep: #861a22;
  --line: #d9d4ca;
  --shadow: 0 18px 50px rgba(17, 23, 34, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 64px;
  padding: 14px clamp(18px, 5vw, 72px);
  color: #fff;
  background: rgba(17, 23, 34, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.brand {
  font-weight: 800;
  font-size: 15px;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
  color: #fff;
}

.hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: 82vh;
  padding: 130px clamp(20px, 6vw, 86px) 72px;
  color: #fff;
  background-image: url("assets/hero.jpg?v=260706-final");
  background-size: cover;
  background-position: center top;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 13, 20, 0.94) 0%, rgba(9, 13, 20, 0.72) 48%, rgba(9, 13, 20, 0.18) 100%),
    linear-gradient(0deg, rgba(17, 23, 34, 0.92) 0%, rgba(17, 23, 34, 0.02) 44%);
}

.hero-content {
  position: relative;
  width: min(820px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-weight: 800;
  font-size: 15px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0;
}

h1 span {
  display: block;
}

.lead {
  width: min(680px, 100%);
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 13px 22px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 16px;
}

.button.primary {
  background: var(--red);
  color: #fff;
  box-shadow: 0 14px 30px rgba(170, 36, 45, 0.3);
}

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--red-deep);
}

.button.secondary {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.08);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background: rgba(255, 255, 255, 0.18);
}

.event-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--night);
  color: #fff;
  border-top: 4px solid var(--gold);
}

.event-strip div {
  min-height: 112px;
  padding: 24px clamp(18px, 3vw, 34px);
  background: #171f2c;
}

.event-strip span {
  display: block;
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 14px;
  font-weight: 800;
}

.event-strip strong {
  display: block;
  font-size: 18px;
  line-height: 1.45;
}

.section,
.poster-section {
  padding: 86px clamp(20px, 6vw, 86px);
}

.section-heading {
  width: min(920px, 100%);
  margin-bottom: 34px;
}

.section-heading h2,
.register h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

.intro {
  background: #fff;
}

.concerns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.concerns article,
.outcome-grid article {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.concerns h3,
.outcome-grid h3,
.schedule h3 {
  margin-bottom: 10px;
  font-size: 20px;
  line-height: 1.35;
}

.concerns p,
.outcome-grid p,
.schedule p,
.target-list p,
.special-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(360px, 1.2fr);
  gap: clamp(28px, 5vw, 72px);
  background: var(--paper);
}

.split .section-heading {
  margin-bottom: 0;
}

.target-list {
  display: grid;
  gap: 14px;
}

.target-list p {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  font-size: 18px;
}

.target-list strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

.outcomes {
  color: #fff;
  background: #171f2c;
}

.outcomes .section-heading h2 {
  color: #fff;
}

.outcomes .section-heading {
  color: rgba(255, 255, 255, 0.78);
}

.outcome-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
}

.outcome-grid article {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
}

.outcome-grid span {
  display: block;
  margin-bottom: 18px;
  color: var(--gold);
  font-weight: 900;
}

.outcome-grid p {
  color: rgba(255, 255, 255, 0.72);
}

.program-section {
  background: #fff;
}

.schedule {
  display: grid;
  border-top: 2px solid var(--ink);
}

.schedule article {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 30px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.schedule time {
  color: var(--red);
  font-weight: 900;
  font-size: 18px;
}

.schedule .speaker {
  display: inline-flex;
  width: fit-content;
  margin-top: 10px;
  padding: 6px 10px;
  border-radius: 6px;
  color: #6f4b07;
  background: rgba(215, 169, 58, 0.16);
  font-size: 14px;
  font-weight: 800;
}

.note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.special {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(360px, 1.22fr);
  gap: clamp(28px, 5vw, 72px);
  background: #efe9dc;
}

.special .section-heading {
  margin-bottom: 0;
}

.special-list {
  display: grid;
  gap: 16px;
}

.special-list p {
  position: relative;
  padding: 20px 22px 20px 54px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.68);
  box-shadow: 0 1px 0 rgba(18, 23, 35, 0.06);
}

.special-list p::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 28px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--gold);
}

.register {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(340px, 0.72fr);
  align-items: center;
  gap: clamp(28px, 6vw, 80px);
  color: #fff;
  background: var(--night);
}

.register-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 28px;
  color: rgba(255, 255, 255, 0.76);
}

.contact-line span {
  color: var(--gold);
  font-weight: 800;
}

.contact-line a {
  color: #fff;
  font-weight: 800;
  word-break: break-all;
}

.qr-panel {
  margin: 0;
}

.qr-panel img {
  width: min(520px, 100%);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.qr-panel figcaption {
  margin-top: 12px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
}

.poster-section {
  background: var(--paper);
}

.poster-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  align-items: start;
}

.poster-grid picture,
.poster-grid img {
  border-radius: 8px;
}

.poster-grid img {
  width: 100%;
  box-shadow: var(--shadow);
}

.site-footer {
  padding: 42px clamp(20px, 6vw, 86px);
  color: rgba(255, 255, 255, 0.76);
  background: #0d1118;
}

.site-footer p {
  max-width: 980px;
  margin: 0 0 8px;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

@media (max-width: 1060px) {
  .event-strip,
  .concerns,
  .outcome-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .outcome-grid article:last-child {
    grid-column: span 2;
  }
}

@media (max-width: 820px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    min-height: auto;
  }

  .site-header nav {
    display: none;
  }

  .hero {
    min-height: 760px;
    padding-top: 104px;
    background-position: 58% top;
  }

  h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 18px;
  }

  .event-strip,
  .concerns,
  .outcome-grid,
  .split,
  .special,
  .register,
  .poster-grid {
    grid-template-columns: 1fr;
  }

  .outcome-grid article:last-child {
    grid-column: auto;
  }

  .schedule article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .section,
  .poster-section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}

@media (max-width: 520px) {
  .hero {
    min-height: 700px;
    padding-left: 18px;
    padding-right: 18px;
  }

  h1 {
    font-size: 34px;
  }

  .button {
    width: 100%;
  }

  .event-strip div {
    min-height: auto;
  }
}