:root {
  --primary: #0f7a6b;
  --primary-dark: #0b5d52;
  --secondary: #e7b94a;
  --secondary-dark: #d7a52d;
  --text: #173532;
  --muted-text: #4b6662;
  --surface: #ffffff;
  --surface-muted: #f1f6f5;
  --border: #d5e4e1;
  --shadow: 0 18px 45px rgba(14, 74, 68, 0.12);
  --radius: 20px;
  --header-height: 5.5rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  color: var(--text);
  background: #ffffff;
}

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

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

button {
  font: inherit;
}

main section[id] {
  scroll-margin-top: calc(var(--header-height) + 1rem);
}

.shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.narrow {
  width: min(900px, 100%);
}

.stack-lg {
  display: grid;
  gap: 3.5rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--primary);
  color: #f8fdfc;
  box-shadow: 0 10px 30px rgba(9, 76, 66, 0.25);
}

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-height);
  gap: 1rem;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  color: rgba(248, 253, 252, 0.8);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.2s ease;
}

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

.menu-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0.75rem;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: inherit;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 4px 0;
  background: currentColor;
}

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100vh - var(--header-height));
  background:
    linear-gradient(135deg, rgba(9, 61, 53, 0.45), rgba(10, 84, 73, 0.2)),
    url("assets/hero-bg.jpg") center center / cover no-repeat;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(8, 80, 70, 0.72), rgba(10, 74, 66, 0.84)),
    radial-gradient(circle at top, rgba(240, 193, 80, 0.16), transparent 38%);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  padding: 5rem 0;
  text-align: center;
  color: #f8fcfb;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.32em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.9rem, 7vw, 5.8rem);
  line-height: 0.98;
}

.hero-copy {
  margin: 1.4rem auto 0;
  max-width: 760px;
  font-size: clamp(1.05rem, 2.3vw, 1.55rem);
  line-height: 1.6;
  color: rgba(248, 252, 251, 0.82);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 2.25rem;
  margin-top: 2.5rem;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(248, 252, 251, 0.92);
  font-weight: 500;
}

.meta-item svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 2.5rem;
  padding: 1rem 2.5rem;
  border-radius: 999px;
  background: var(--secondary);
  color: #26321e;
  font-size: 1.05rem;
  font-weight: 700;
  box-shadow: 0 18px 35px rgba(22, 51, 50, 0.18);
  transition: transform 0.2s ease, background 0.2s ease;
}

.cta-button:hover,
.cta-button:focus-visible {
  background: var(--secondary-dark);
  transform: translateY(-2px);
}

.section {
  padding: 5.5rem 0;
}

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

.section-heading {
  margin-bottom: 3rem;
  text-align: center;
}

.section-heading h2,
.content-block h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.1;
}

.section-heading p,
.content-block p {
  margin: 0;
  color: var(--muted-text);
  line-height: 1.85;
  font-size: 1rem;
}

.content-block {
  padding: 0;
}

.agenda-shell {
  max-width: 860px;
}

.timeline {
  position: relative;
  display: grid;
  gap: 2rem;
  padding-left: 2rem;
  border-left: 2px solid rgba(15, 122, 107, 0.25);
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  left: -2.68rem;
  top: 0.15rem;
  width: 1.15rem;
  height: 1.15rem;
  border: 4px solid #ffffff;
  border-radius: 999px;
  background: var(--primary);
  box-shadow: 0 0 0 1px rgba(15, 122, 107, 0.22);
}

.timeline-time {
  margin: 0 0 0.4rem;
  color: var(--primary);
  font-weight: 700;
  font-size: 0.98rem;
}

.timeline-title,
.timeline-subtitle {
  margin: 0;
  line-height: 1.6;
}

.timeline-title-strong {
  font-weight: 800;
}

.speaker-groups {
  display: grid;
  gap: 3.5rem;
}

.speaker-group h3 {
  margin: 0 0 1.5rem;
  padding-left: 1rem;
  border-left: 4px solid var(--primary);
  color: var(--primary);
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  line-height: 1.35;
}

.speaker-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.speaker-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 132px;
  padding: 1.25rem;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.speaker-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 50px rgba(14, 74, 68, 0.16);
}

.speaker-card img {
  width: 5rem;
  height: 5rem;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 auto;
  background: rgba(15, 122, 107, 0.08);
}

.speaker-card h4 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.3;
}

.speaker-card p {
  margin: 0.35rem 0 0;
  color: var(--muted-text);
  font-size: 0.92rem;
  line-height: 1.5;
}

.speaker-role {
  display: inline-block;
  margin-top: 0.35rem;
  padding: 0.22rem 0.45rem;
  border-radius: 999px;
  background: rgba(15, 122, 107, 0.1);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.register-shell {
  max-width: 980px;
}

.form-frame {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.form-frame iframe {
  display: block;
  width: 100%;
  min-height: 2150px;
  border: 0;
  background: #ffffff;
}

.site-footer {
  padding: 2rem 0;
  background: var(--primary);
  color: rgba(248, 253, 252, 0.78);
}

.footer-content {
  text-align: center;
  font-size: 0.95rem;
  line-height: 1.7;
}

.footer-content p {
  margin: 0;
}

.footer-content p + p {
  margin-top: 0.25rem;
}

@media (max-width: 900px) {
  .speaker-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    left: 1rem;
    right: 1rem;
    top: calc(100% + 0.75rem);
    display: grid;
    gap: 0.25rem;
    padding: 0.85rem;
    border-radius: 18px;
    background: #ffffff;
    color: var(--text);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 0.85rem 0.9rem;
    border-radius: 12px;
    color: var(--text);
  }

  .site-nav a:hover,
  .site-nav a:focus-visible {
    background: var(--surface-muted);
    color: var(--primary);
  }

  .hero {
    min-height: auto;
  }

  .hero-content {
    padding: 4.5rem 0;
  }

  .hero-meta {
    flex-direction: column;
    align-items: center;
  }

  .timeline {
    padding-left: 1.6rem;
  }

  .timeline-dot {
    left: -2.28rem;
  }

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

  .form-frame iframe {
    min-height: 2400px;
  }
}

@media (max-width: 560px) {
  :root {
    --header-height: 4.8rem;
  }

  .shell {
    width: min(100% - 1.25rem, 1120px);
  }

  .section {
    padding: 4.5rem 0;
  }

  .speaker-card {
    align-items: flex-start;
  }

  .speaker-card img {
    width: 4.4rem;
    height: 4.4rem;
  }
}