* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Open Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #333;
  line-height: 1.6;
  background: #f5f5f5;
}

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

/* Hero Section */
.hero {
  position: relative;
  background: linear-gradient(135deg, #4a5568 0%, #2d3748 100%);
  min-height: 300px;
  display: flex;
  flex-direction: column;
}

.nav {
  display: flex;
  justify-content: flex-end;
  gap: 32px;
  padding: 20px 40px;
  color: #fff;
  font-size: 0.95rem;
}

.nav a {
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease;
}

.nav a:hover,
.nav a.active {
  border-bottom-color: #e74c3c;
}

.hero-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  color: #fff;
  padding: 40px 20px 80px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 1.2rem;
  opacity: 0.95;
}

/* Main Content */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 60px 24px;
}

section {
  margin-bottom: 60px;
}

h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: #2c3e50;
  margin-bottom: 8px;
  padding-bottom: 12px;
  position: relative;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 3px;
  background: #e74c3c;
}

h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #2c3e50;
  margin: 32px 0 16px;
}

p {
  margin-bottom: 16px;
  color: #444;
}

ul {
  margin: 16px 0 16px 24px;
  color: #444;
}

li {
  margin-bottom: 8px;
}

/* Topics */
.topics {
  margin: 24px 0 32px;
}

.topic {
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 3px solid #e74c3c;
}

.topic h3 {
  margin: 0 0 8px;
  font-size: 1.1rem;
}

.topic p {
  margin: 0;
  color: #555;
}

/* Button */
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: #e74c3c;
  color: #fff;
  border-radius: 4px;
  font-weight: 600;
  transition: background 0.2s ease;
  margin-top: 8px;
}

.btn:hover {
  background: #c0392b;
}

/* Dates Table */
.dates-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.dates-table td {
  padding: 16px 20px;
  border-bottom: 1px solid #eee;
}

.dates-table tr:last-child td {
  border-bottom: none;
}

.dates-table td:first-child {
  width: 50%;
  color: #333;
}

.dates-table td:last-child {
  color: #e74c3c;
  font-weight: 600;
}

/* Footer */
footer {
  text-align: center;
  padding: 40px 20px;
  background: #f8f9fa;
  color: #666;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
  .nav {
    justify-content: center;
    gap: 16px;
    padding: 16px 20px;
    font-size: 0.85rem;
  }

  .hero {
    min-height: 350px;
  }

  .container {
    padding: 40px 20px;
  }

  h2 {
    font-size: 1.5rem;
  }

  .dates-table td {
    padding: 12px 8px;
    display: block;
  }

  .dates-table td:first-child {
    width: 100%;
    border-bottom: none;
    padding-bottom: 4px;
  }

  .dates-table td:last-child {
    padding-top: 0;
  }
}