body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background-color: #121212;
  color: #e0e0e0;
  line-height: 1.6;
}

header {
  background-color: #1f1f1f;
  padding: 1rem 2rem;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
}

.header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
  font-size: 1.8rem;
  color: #ffffff;
}

nav {
  display: flex;
}

nav a {
  color: #bbbbbb;
  text-decoration: none;
  margin: 0 12px;
  font-weight: 500;
  padding: 6px 10px;
  transition: background-color 0.2s, color 0.2s;
}

main {
  padding: 2rem;
  max-width: 1100px;
  margin: auto;
  background-color: #1e1e1e;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

textarea {
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 4px;
  resize: vertical;
  background-color: #2c2c2c;
  color: #ffffff;
  font-size: 1rem;
  line-height: 1.4;
}

button {
  background-color: #007bff;
  color: #ffffff;
  border: none;
  padding: 8px 16px;
  margin-top: 10px;
  font-size: 1rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s;
}

nav a:hover {
  background-color: #4a4a4a;
  color: #ffffff;
}

nav a.active {
  background-color: #333;
  color: #fff;
  border-radius: 4px;
}

#status {
  margin-top: 10px;
  color: #4caf50;
}

.video-wrapper {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
}

.video-title {
  text-align: center;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: #bbbbbb;
}

.mit {
  text-align: center;
  margin-bottom: 1.5rem;
  font-weight: 600;
}

footer {
  text-align: center;
}