:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --ink: #172033;
  --muted: #5d6678;
  --line: #d8dde7;
  --teal: #0f766e;
  --teal-dark: #0f4d49;
  --coral: #c84f31;
  --coral-hover: #b9472c;
  --gold: #a66f12;
  --blue: #315f9f;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.08);
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--teal-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--coral-hover);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0.7rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand img {
  width: 38px;
  height: 38px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.1rem;
  flex-wrap: wrap;
  min-width: 0;
}

.nav-links a {
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  padding: 0.42rem 0.68rem;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  background: #eef6f5;
  color: var(--teal-dark);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #eef5fb url("background.png") center / cover no-repeat;
}

.hero::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.96) 0%,
    rgba(255, 255, 255, 0.91) 48%,
    rgba(255, 255, 255, 0.73) 72%,
    rgba(255, 255, 255, 0.48) 100%
  );
  content: "";
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(290px, 0.75fr);
  gap: 2.5rem;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: clamp(3rem, 8vw, 6.5rem) 0 2rem;
}

.eyebrow {
  color: var(--teal-dark);
  font-size: 0.86rem;
  font-weight: 800;
  margin: 0 0 0.85rem;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.14;
  margin: 0;
}

h1 {
  font-size: clamp(1.85rem, 4vw, 3.65rem);
  max-width: 980px;
  overflow-wrap: anywhere;
}

h2 {
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.08rem;
  margin-bottom: 0.45rem;
}

.lead {
  color: #3f4757;
  font-size: clamp(1.05rem, 2vw, 1.24rem);
  max-width: 840px;
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.45rem;
}

.section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}

.section-nav a {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 750;
  padding: 0.45rem 0.75rem;
  text-decoration: none;
}

.section-nav a:hover {
  border-color: #bde0dd;
  color: var(--teal-dark);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  min-height: 44px;
  padding: 0.72rem 1.1rem;
  text-decoration: none;
}

.button.primary {
  background: var(--teal);
  color: #fff;
}

.button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}

.fact-panel {
  align-self: end;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.1rem;
  min-width: 0;
}

.fact-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.fact-list div {
  display: grid;
  gap: 0.1rem;
}

.fact-list dt {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.fact-list dd {
  margin: 0;
  font-weight: 750;
  overflow-wrap: anywhere;
}

.section {
  border-bottom: 1px solid var(--line);
  padding: clamp(2rem, 5vw, 4rem) 0;
}

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

.wrap {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.grid {
  display: grid;
  gap: 1rem;
}

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

.grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem;
  min-width: 0;
  overflow-wrap: anywhere;
}

.card.strong {
  border-top: 4px solid var(--teal);
  box-shadow: var(--shadow);
}

.card p,
.section p {
  margin-top: 0;
}

.muted {
  color: var(--muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0 0;
  padding: 0;
}

.tag-list li {
  list-style: none;
  background: #eef6f5;
  border: 1px solid #c9e6e2;
  border-radius: 999px;
  color: var(--teal-dark);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.34rem 0.65rem;
}

.topic-list,
.plain-list {
  margin: 0;
  padding-left: 1.25rem;
}

.topic-list li,
.plain-list li {
  margin: 0.55rem 0;
}

.date-table,
.schedule-table {
  border-collapse: collapse;
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.date-table th,
.date-table td,
.schedule-table th,
.schedule-table td {
  border-bottom: 1px solid var(--line);
  padding: 0.85rem;
  text-align: left;
  vertical-align: top;
}

.date-table tr:last-child td,
.schedule-table tr:last-child td {
  border-bottom: 0;
}

.date-table th,
.schedule-table th {
  background: #f0f3f8;
  color: #303a4d;
  font-size: 0.82rem;
  text-transform: uppercase;
}

.person-card {
  display: grid;
  gap: 0.45rem;
}

.person-card .name {
  font-size: 1.05rem;
  font-weight: 850;
}

.person-card .affiliation {
  color: var(--muted);
  font-weight: 650;
}

.callout {
  background: #fff7ed;
  border: 1px solid #f3c89e;
  border-left: 5px solid var(--gold);
  border-radius: var(--radius);
  padding: 1rem;
}

.notice {
  background: #edf7f6;
  border: 1px solid #bde0dd;
  border-left: 5px solid var(--teal);
  border-radius: var(--radius);
  padding: 1rem;
}

.site-footer {
  background: #172033;
  color: #d9deea;
  padding: 2rem 0;
}

.site-footer a {
  color: #ffffff;
}

.site-footer .muted {
  color: #c7cfde;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

@media (max-width: 840px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
    width: 100%;
  }

  .hero-inner,
  .grid.two,
  .grid.three,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .fact-panel {
    align-self: start;
  }

  .hero {
    background-position: 52% center;
  }

  .hero::before {
    background: linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.95) 0%,
      rgba(255, 255, 255, 0.9) 62%,
      rgba(255, 255, 255, 0.78) 100%
    );
  }
}

@media (max-width: 540px) {
  .nav {
    width: min(100% - 20px, 1180px);
  }

  .nav-links a {
    padding: 0.38rem 0.52rem;
  }

  h1 {
    font-size: 1.85rem;
    line-height: 1.2;
  }

  .wrap,
  .hero-inner {
    width: min(100% - 20px, 1180px);
  }

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

  .date-table,
  .schedule-table {
    overflow: hidden;
  }

  .date-table thead,
  .schedule-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
    white-space: nowrap;
  }

  .date-table tr,
  .schedule-table tr {
    border-bottom: 1px solid var(--line);
    padding: 0.75rem 0.85rem;
  }

  .date-table tr:last-child,
  .schedule-table tr:last-child {
    border-bottom: 0;
  }

  .date-table td,
  .schedule-table td {
    border-bottom: 0;
    padding: 0.2rem 0;
  }

  .date-table td::before,
  .schedule-table td::before {
    color: var(--muted);
    display: block;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
  }

  .date-table td:nth-child(1)::before {
    content: "Milestone";
  }

  .date-table td:nth-child(2)::before {
    content: "Date";
  }

  .schedule-table td:nth-child(1)::before {
    content: "Time";
  }

  .schedule-table td:nth-child(2)::before {
    content: "Session";
  }

  .schedule-table td:nth-child(3)::before {
    content: "Details";
  }
}