:root {
  color-scheme: light;
  font-family: Segoe UI, Arial, sans-serif;
}

body {
  margin: 0;
  background: #f3f4f6;
  color: #111827;
}

.app {
  max-width: 640px;
  margin: 40px auto;
  background: #ffffff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
}

h1 {
  margin-top: 0;
}

.task-form {
  display: flex;
  gap: 8px;
}

.task-form input {
  flex: 1;
  padding: 10px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
}

.task-form button {
  padding: 10px 14px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: #fff;
  cursor: pointer;
}

.task-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 10px;
}

.task-item.done .title {
  text-decoration: line-through;
  opacity: 0.6;
}

.actions {
  display: flex;
  gap: 6px;
}

.actions button {
  border: none;
  border-radius: 6px;
  padding: 6px 8px;
  cursor: pointer;
}

.edit-btn {
  background: #f59e0b;
  color: #fff;
}

.toggle-btn {
  background: #10b981;
  color: #fff;
}

.delete-btn {
  background: #ef4444;
  color: #fff;
}