:root {
  --holo-blue: #5da9e9;
  --ancient-clay: #4a3427;
  --aged-parchment: #5da9e9;
  --study-wood: #4a3427;
  --slate-gray: #3c4146;
  --page-bg: var(--aged-parchment);
  --surface: #ffffff;
  --ink: var(--study-wood);
  --link: var(--holo-blue);
  --line: var(--ancient-clay);
  --band: rgba(60, 65, 70, 0.82);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: "Open Sans", sans-serif;
}

.topbar {
  background: #ffffff;
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  width: min(1280px, 96vw);
  margin: 0 auto;
  min-height: 98px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
}

.brand-group {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
}

.brand {
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand-main {
  font-size: 2rem;
  font-weight: 800;
  color: var(--study-wood);
}

.brand-sub {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--holo-blue);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.dh2026-logo-link {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
}

.dh2026-logo {
  height: 62px;
  width: auto;
  display: block;
}

.menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 1.1rem;
}

.menu a {
  color: var(--link);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.12rem;
}

.menu a.active {
  border-bottom-color: var(--link);
}

a,
a:visited {
  color: #5da9e9;
}

a:hover {
  color: #5da9e9;
}

.hero {
  min-height: clamp(430px, 52vw, 620px);
  background-image: linear-gradient(rgba(40, 27, 16, 0.36), rgba(40, 27, 16, 0.36)),
    url("images/bg.png");
  background-size: cover;
  background-position: center 45%;
  display: grid;
  align-items: center;
}

.hero-band {
  background: var(--band);
  padding: clamp(2rem, 4vw, 3.3rem) 1rem;
}

.hero-band h1 {
  margin: 0 auto;
  width: min(1200px, 92vw);
  color: #ffffff;
  text-align: center;
  text-wrap: balance;
  font-size: clamp(2rem, 4.1vw, 4.4rem);
  line-height: 1.17;
  font-weight: 800;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.22);
}

.hero-subtitle {
  margin: 0.8rem auto 0;
  width: min(1200px, 92vw);
  text-align: center;
  color: #e8f3fc;
  font-size: clamp(1rem, 1.6vw, 1.45rem);
  font-weight: 600;
}

.hero-subtitle a {
  color: var(--holo-blue);
}

main {
  width: min(1280px, 92vw);
  margin: 2.6rem auto 3.2rem;
  display: grid;
  gap: 1.15rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.2rem;
}

h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 2.2vw, 2.4rem);
  color: var(--study-wood);
}

.intro p {
  margin: 0;
  max-width: 90ch;
  line-height: 1.58;
  font-size: 1.03rem;
}

.cfp p {
  margin: 0 0 0.95rem;
  line-height: 1.62;
}

.home-overview p {
  max-width: none;
  text-align: justify;
}

.cfp h3 {
  margin: 1.3rem 0 0.55rem;
  font-size: 1.18rem;
  color: var(--ancient-clay);
}

.cfp ul,
.cfp ol {
  margin: 0 0 0.8rem;
  padding-left: 1.25rem;
}

.cfp li {
  margin-bottom: 0.45rem;
  line-height: 1.52;
}

.references {
  font-size: 0.92rem;
  color: var(--slate-gray);
}

.committee-intro {
  margin: 0 0 1rem;
  line-height: 1.55;
}

.committee-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
}

.member {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.9rem;
  background: #ffffff;
}

.member h3 {
  margin: 0 0 0.3rem;
  font-size: 1.1rem;
  color: var(--study-wood);
}

.member-affiliation {
  margin: 0 0 0.45rem;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--slate-gray);
}

.member p {
  margin: 0 0 0.45rem;
  line-height: 1.5;
}

.member a {
  color: var(--link);
}

.rows {
  display: grid;
  gap: 0.7rem;
}

.row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(160px, 1fr);
  gap: 0.75rem;
  align-items: center;
}

.label {
  font-size: 0.98rem;
  color: var(--study-wood);
}

.value {
  height: 2.2rem;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background: #f8ecd8;
}

.value-text {
  font-size: 0.95rem;
  color: var(--study-wood);
  line-height: 1.4;
}

.program-agenda {
  background: var(--surface);
  border-color: var(--line);
  padding: 2rem 2.25rem;
}

.program-agenda h2 {
  margin-bottom: 1.4rem;
}

.agenda-item {
  margin: 0;
  padding: 1.15rem 0;
}

.agenda-item + .agenda-item {
  border-top: 1px solid var(--line);
}

.agenda-time {
  margin: 0 0 0.35rem;
  font-size: clamp(0.95rem, 1.2vw, 1.08rem);
  font-weight: 800;
  color: var(--slate-gray);
}

.agenda-title {
  margin: 0;
  font-size: clamp(1.02rem, 1.35vw, 1.22rem);
  line-height: 1.34;
  color: var(--study-wood);
}

.agenda-tag {
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ancient-clay);
}

.agenda-detail {
  margin: 0.75rem 0 0;
  font-size: clamp(0.96rem, 1.15vw, 1.05rem);
  color: var(--study-wood);
  line-height: 1.42;
}

@media (max-width: 980px) {
  .topbar-inner {
    align-items: flex-start;
    padding: 1rem 0;
    min-height: auto;
    flex-direction: column;
  }

  .brand-group {
    gap: 0.7rem;
  }

  .dh2026-logo {
    height: 54px;
  }

  .menu {
    justify-content: flex-start;
    gap: 0.8rem 1rem;
  }
}

@media (max-width: 700px) {
  .brand-main {
    font-size: 1.52rem;
  }

  .menu a {
    font-size: 0.98rem;
  }

  .hero {
    min-height: 360px;
  }

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

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

  .program-agenda {
    padding: 1.2rem 1rem;
  }

  .agenda-detail {
    margin-top: 0.5rem;
  }
}