/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: 'Roboto', sans-serif;
  line-height: 1.7;
  color: #333;
  background: #f8f9fa;
}
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.main-header {
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}
.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #003366;
}
.main-header nav a {
  margin-left: 30px;
  text-decoration: none;
  color: #333;
  font-weight: 500;
}
.main-header nav a:hover {
  color: #003366;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #003366, #005588);
  color: white;
  padding: 160px 0 100px;
  margin-top: 70px;
}
.hero-content {
  max-width: 800px;
}
.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 15px;
  line-height: 1.2;
}
.hero h2 {
  font-size: 1.4rem;
  font-weight: 400;
  margin-bottom: 20px;
  opacity: 0.9;
}
.event-info {
  display: flex;
  gap: 25px;
  margin-bottom: 30px;
  flex-wrap: wrap;
  font-size: 1.1rem;
}
.countdown {
  background: white;
  color: #003366;
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  font-weight: 700;
}
#timer {
  font-size: 1.8rem;
  margin-top: 10px;
}

/* Section */
.section {
  padding: 80px 0;
}
.section h2 {
  text-align: center;
  color: #003366;
  margin-bottom: 50px;
  font-size: 2rem;
}
.bg-light {
  background: #f0f4f8;
}

/* Topics Grid */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}
.topic-card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  text-align: center;
}

/* Dates Grid */
.dates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}
.date-item {
  text-align: center;
  padding: 20px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.date-item strong {
  display: block;
  font-size: 1.4rem;
  color: #003366;
}

/* Committees Grid */
.committees-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}
.committee-card {
  background: white;
  padding: 25px;
  border-radius: 8px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}
.committee-card h4 {
  color: #003366;
  margin-bottom: 5px;
}
.committee-card p {
  color: #555;
  font-size: 0.95rem;
}

/* Registration */
.registration-section {
  background: #003366;
  color: white;
  padding: 80px 0;
  text-align: center;
}
.registration-section h2 {
  color: white;
  margin-bottom: 15px;
}
.registration-section p {
  margin-bottom: 30px;
  opacity: 0.9;
}
#registration-form {
  max-width: 500px;
  margin: 0 auto;
  display: grid;
  gap: 15px;
}
#registration-form input,
#registration-form select {
  padding: 12px;
  border: none;
  border-radius: 4px;
}
.btn-primary {
  background: #00A896;
  color: white;
  border: none;
  padding: 12px 30px;
  font-size: 1.1rem;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 500;
}
.btn-primary:hover {
  background: #008f7f;
}
.note {
  margin-top: 20px;
  font-size: 0.95rem;
  opacity: 0.8;
}
.note a {
  color: #00A896;
}

/* Partners */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  text-align: center;
}
.partner {
  background: white;
  padding: 15px;
  border-radius: 8px;
  font-size: 0.95rem;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* Footer */
footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 30px 0;
  font-size: 0.95rem;
}

/* Responsive */
@media (max-width: 768px) {
  .main-header nav {
    display: none;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .hero h2 {
    font-size: 1.2rem;
  }
  .event-info {
    flex-direction: column;
    gap: 10px;
  }
  .countdown {
    padding: 10px 20px;
  }
  #timer {
    font-size: 1.4rem;
  }
}