:root {
  color-scheme: light;
  color: #111827;
  background-color: #ffffff;
  font-family:
    Inter,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

.page-shell {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background: #ffffff;
  color: #111827;
  padding: 2rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid #eee;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.site-logo {
  width: 72px;
  height: auto;
  border-radius: 8px;
}

.header-text {
  text-align: center;
}

.header-content h1 {
  margin: 0;
  font-size: clamp(2.5rem, 4vw, 4rem);
  letter-spacing: -0.05em;
}

.subheading {
  margin: 0.75rem auto 0;
  max-width: 48rem;
  color: #d6e1ff;
  font-size: 1.1rem;
}

.site-main {
  flex: 1;
  padding: 3rem 1.5rem;
  max-width: 1080px;
  margin: 0 auto;
}

.hero {
  display: grid;
  gap: 2rem;
  align-items: center;
  grid-template-columns: 1.5fr 1fr;
  margin-bottom: 3rem;
}

.hero-text h2 {
  margin-top: 0;
  font-size: clamp(2rem, 3vw, 2.75rem);
}

.hero-text p {
  margin: 1rem 0 0;
  max-width: 38rem;
}

.cta-button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.25rem;
  background: #0b67d0;
  color: #ffffff;
  font-weight: 700;
  text-decoration: none;
  border-radius: 999px;
  transition:
    transform 0.12s ease,
    background 0.12s ease;
}

.cta-button:hover {
  transform: translateY(-2px);
  background: #0a5ac2;
}

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

.registration {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1rem;
  border-radius: 999px;
  border: none;
  text-decoration: none;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary {
  background: #0b67d0;
  color: #ffffff;
}

.btn-disabled {
  background: #f2f4f6;
  color: #8b95a3;
  border: 1px solid #e6e9ed;
  cursor: not-allowed;
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;

  img {
    width: 100%;
    border-radius: 10px;
  }
}

.image-placeholder {
  width: 100%;
  min-height: 18rem;
  border-radius: 1.5rem;
  background: linear-gradient(180deg, #e0e8f2 0%, #cad5e4 100%);
  color: #54657a;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.content-section {
  padding: 2rem 1.5rem;
  background: #ffffff;
  border-radius: 1.25rem;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
  margin-bottom: 2rem;
}

.content-section h3 {
  margin-top: 0;
}

.content-section ul {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
}

.content-section li {
  margin-bottom: 0.75rem;
}

.site-footer {
  padding: 1.5rem;
  text-align: center;
  color: #5a6374;
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .site-header,
  .site-main,
  .content-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .page-shell {
    min-height: auto;
  }
}