:root {
  --color-primary-dark: #0D2647;
  --color-primary: #174682;
  --color-accent: #3CA3C7;
}
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #ffffff;
  color: #1f2937;
  display: flex;
  flex-direction: column;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background-color: white;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
header img.logo {
  height: 64px;
}
nav a {
  margin: 0 1rem;
  text-decoration: none;
  color: #000;
  font-weight: bold;
  font-size: 1rem;
  transition: color 0.2s;
}
nav a:hover {
  color: var(--color-accent);
}
.topbar {
  background-image: url('topbar.png');
  background-size: cover;
  background-position: center;
  height: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.4rem;
  font-weight: bold;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}
.countdown {
  margin-top: 0.5rem;
  display: flex;
  gap: 10px;
  font-size: 1rem;
}
.countdown span {
  background-color: rgba(255, 255, 255, 0.15);
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
}
main {
  display: flex;
  padding: 2rem;
  max-width: 1200px;
  margin: auto;
}
.content {
  flex: 3;
  padding-right: 2rem;
}
.sidebar {
  flex: 1;
  padding-left: 2rem;
  border-left: 1px solid #e5e7eb;
}
.sidebar h3 {
  font-size: 1rem;
  color: var(--color-primary-dark);
  margin-bottom: 1rem;
}
.sidebar ul {
  list-style: none;
  padding: 0;
}
.sidebar li {
  margin-bottom: 0.5rem;
}
.sidebar a {
  text-decoration: none;
  color: var(--color-primary);
  font-size: 0.95rem;
}
.sidebar a:hover {
  color: var(--color-accent);
}
.graphic {
  width: 100%;
  margin: 2rem 0;
  text-align: center;
}
.graphic img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: none;
}
.next-links {
  margin-top: 3rem;
}
.next-links a {
  display: inline-block;
  margin-right: 1rem;
  color: var(--color-accent);
  text-decoration: none;
}
footer {
  text-align: center;
  padding: 2rem;
  color: #6b7280;
  font-size: 0.9rem;
}
h1 {
  margin-top: 3rem;
  font-weight: 1000;
}
h2 {
  margin-top: 2.5rem;
  font-weight: 900;
}
h3 {
  margin-top: 2rem;
  font-weight: bold;
}
a {
  font-style: italic;
  font-weight: 400;
}
h1, h2, h3 {
  color: var(--color-primary);
}