@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300..700&display=swap");

:root {
  --bg: #f9fafb;
  --card: #ffffff;
  --text: #1f2937;
  --text-secondary: #6b7280;
  --primary: #6366f1;
  --hover: #e0e7ff;
  --done: #10b981;
}

.dark {
  --bg: #1e1e2f;
  --card: #2d2d44;
  --text: #e5e7eb;
  --text-secondary: #9ca3af;
  --primary: #7c3aed;
  --hover: #4c1d95;
  --done: #22d3ee;
}

body {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  background-color: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.3s;
}

.container {
  max-width: 500px;
  margin: 50px auto;
  background-color: var(--card);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.06);
}

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

h1 {
  margin: 0;
  color: var(--primary);
}

#themeToggle {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
}

.todo-input {
  display: flex;
  gap: 10px;
  margin: 20px 0;
}

input[type="text"] {
  flex: 1;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 16px;
  outline: none;
}

button {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 12px 16px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

button:hover {
  background-color: var(--hover);
}

.filters {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.filters button {
  background-color: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
}

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

li {
  background-color: var(--hover);
  padding: 12px 16px;
  margin-bottom: 10px;
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

li.completed {
  text-decoration: line-through;
  color: var(--text-secondary);
  background-color: var(--card);
}

li button {
  background: none;
  border: none;
  color: #ef4444;
  font-size: 18px;
  cursor: pointer;
}

li label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

li input[type="checkbox"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
}