body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

.app {
  width: min(700px, 92%);
  margin: 2rem auto;
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 1.2rem;
}

h1 {
  margin-top: 0;
}

.sub {
  color: #94a3b8;
}

form {
  display: flex;
  gap: 0.5rem;
}

input {
  flex: 1;
  padding: 0.65rem;
  border-radius: 10px;
  border: 1px solid #475569;
  background: #0f172a;
  color: #e2e8f0;
}

button {
  padding: 0.65rem 1rem;
  border: none;
  border-radius: 10px;
  background: #22c55e;
  color: #052e16;
  font-weight: bold;
  cursor: pointer;
}

ul {
  list-style: none;
  margin: 1rem 0;
  padding: 0;
}

li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: 10px;
  padding: 0.65rem;
  margin-bottom: 0.55rem;
}

li.done span {
  text-decoration: line-through;
  color: #94a3b8;
}

.task-actions {
  display: flex;
  gap: 0.35rem;
}

.task-actions button {
  padding: 0.4rem 0.65rem;
  background: #e2e8f0;
  color: #0f172a;
}

.actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.actions a {
  color: #38bdf8;
  text-decoration: none;
}