*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 20px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(to right, #000000, #150537);
  color: #fff;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}

.container {
  width: 100%;
  max-width: 1200px;
  background: rgba(255, 255, 255, 0.08);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
  text-align: center;
}

h1 {
  margin-bottom: 25px;
  font-size: 2.4em;
  color: #fff;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
}

h2 {
  color: #555;
  margin: 0 0 20px;
  font-size: 1.7em;
}

.input-section {
  background: #fff;
  color: #333;
  padding: 20px;
  border-radius: 10px;
  margin-bottom: 30px;
  display: flex;
  flex-direction: column;
  gap: 15px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.input-section input[type="text"],
.input-section textarea {
  width: 100%;
  padding: 12px;
  font-size: 1em;
  border: 1px solid #ccc;
  border-radius: 6px;
  transition: border-color 0.3s ease;
}

.input-section input:focus,
.input-section textarea:focus {
  border-color: #007bff;
  outline: none;
}

.input-section textarea {
  min-height: 80px;
  resize: vertical;
}

.input-section button {
  align-self: flex-end;
  padding: 12px 24px;
  font-size: 1.05em;
  border: none;
  border-radius: 6px;
  background: #28a745;
  color: #fff;
  cursor: pointer;
  transition: background 0.3s, transform 0.1s;
}

.input-section button:hover {
  background: #218838;
  transform: translateY(-2px);
}

.task-sections {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
  justify-content: center;
}

.pending-section, .completed-section {
  flex: 1 1 400px;
  background: #fff;
  color: #333;
  padding: 25px;
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
  margin-top: 10px;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid #eee;
  word-break: break-word;
  vertical-align: top;
}

th {
  background: #343a40;
  color: #fff;
  font-size: 0.95em;
  text-transform: uppercase;
}

td {
  background: #f8f9fa;
}

tr:last-child td {
  border-bottom: none;
}

input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  appearance: none;
  border: 2px solid #007bff;
  border-radius: 4px;
  position: relative;
  top: -2px;
}

input[type="checkbox"]:checked {
  background-color: #007bff;
  border-color: #007bff;
}

input[type="checkbox"]:checked::after {
  content: '✔';
  color: #fff;
  font-size: 14px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

button.delete-btn {
  background: #dc3545;
  color: #fff;
  border: none;
  padding: 8px 14px;
  border-radius: 5px;
  font-size: 0.9em;
  cursor: pointer;
  transition: background 0.3s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

button.delete-btn:hover {
  background: #c82333;
}

.completed-row {
  background-color: #e9ecef !important;
}

.completed-row td {
  color: #6c757d;
}

td:last-child {
  text-align: center;
  width: 80px;
}