:root {
  --primary: #6a11cb;
  --secondary: #2575fc;
  --text-dark: #1e1e1e;
  --text-light: #ffffff;
  --bg-light: #f4f4f4;
  --bg-dark: #1e1e2f;
  --card-bg: #ffffff;
  --card-dark-bg: #2e2e48;
  --accent: #f39c12;
  --success: #2ecc71;
  --error: #e74c3c;
  --transition: 0.3s ease;
}

body.dark {
  background-color: var(--bg-dark);
  color: var(--text-light);
}

body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  transition: var(--transition);
}

.container {
  max-width: 700px;
  margin: 40px auto;
  padding: 20px;
  background-color: var(--card-bg);
  border-radius: 15px;
  box-shadow: 0 0 25px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

body.dark .container {
  background-color: var(--card-dark-bg);
}

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

h1 {
  font-size: 2.4rem;
  margin: 0;
  font-weight: bold;
}

.gradient {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.input-section {
  margin-top: 25px;
  display: flex;
  gap: 12px;
}

.input-section input {
  flex: 1;
  padding: 12px 15px;
  font-size: 1rem;
  border: 2px solid #ccc;
  border-radius: 10px;
  transition: var(--transition);
}

.input-section input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 5px var(--primary);
}

.add-btn {
  background: linear-gradient(to right, var(--primary), var(--secondary));
  border: none;
  border-radius: 10px;
  padding: 0 16px;
  cursor: pointer;
  color: white;
  font-size: 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.add-btn:hover {
  opacity: 0.85;
}

ul#task-list {
  list-style: none;
  padding: 0;
  margin-top: 30px;
}

ul#task-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px;
  margin-bottom: 10px;
  background-color: #f8f8f8;
  border-radius: 8px;
  transition: var(--transition);
}

body.dark ul#task-list li {
  background-color: #3a3a55;
}

ul#task-list li.completed {
  opacity: 0.6;
  text-decoration: line-through;
}

ul#task-list input[type="checkbox"] {
  margin-right: 10px;
  transform: scale(1.2);
}

ul#task-list span {
  flex-grow: 1;
  margin: 0 10px;
  cursor: text;
  outline: none;
}

ul#task-list button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--error);
  font-size: 1.2rem;
}

ul#task-list button:hover {
  transform: scale(1.1);
}

.filter-section {
  margin-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.view-buttons {
  display: flex;
  gap: 8px;
}

.view-btn {
  padding: 8px 14px;
  border: 1px solid var(--primary);
  border-radius: 8px;
  background-color: transparent;
  color: var(--primary);
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
}

.view-btn.active,
.view-btn:hover {
  background-color: var(--primary);
  color: white;
}

.sort-dropdown select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid #ccc;
  font-size: 0.9rem;
}

.fancy-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
}

.fancy-toggle input {
  display: none;
}

.fancy-toggle label {
  position: relative;
  width: 60px;
  height: 30px;
  background: #ccc;
  border-radius: 30px;
  cursor: pointer;
  transition: background 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  box-sizing: border-box;
  font-size: 16px;
}

.fancy-toggle .icon {
  z-index: 1;
}

.fancy-toggle .ball {
  position: absolute;
  top: 2.5px;
  left: 2.5px;
  width: 25px;
  height: 25px;
  background: white;
  border-radius: 50%;
  transition: transform 0.3s ease;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
  z-index: 2;
}

.fancy-toggle input:checked + label .ball {
  transform: translateX(30px);
}

body.dark .fancy-toggle label {
  background: #444;
}

#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 99;
}

.toast {
  background: var(--accent);
  color: white;
  padding: 12px 18px;
  margin-bottom: 10px;
  border-radius: 8px;
  font-size: 0.95rem;
  box-shadow: 0 0 12px rgba(0, 0, 0, 0.2);
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

#loader {
  display: none;
  text-align: center;
  color: var(--primary);
  font-weight: bold;
  margin-top: 20px;
}

.task-count {
  text-align: center;
  margin-top: 20px;
  font-size: 1rem;
  color: var(--secondary);
}