:root {
  --bg-color: #1a1a1a;
  --card-color: #2a2a2a;
  --primary-color: #003b72;
  --secondary-color: #0056a3;
  --text-color: #e0e0e0;
  --border-color: #444;
  --on-time-color: #28a745;
  --late-color: #dc3545;
}

body {
  font-family: "Segoe UI", system-ui, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

main {
  display: grid;
  gap: 20px;
}

.card {
  background-color: var(--card-color);
  padding: 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

header {
  text-align: center;
}
h1,
h2 {
  margin-top: 0;
}

h1 {
  color: var(--secondary-color);
}

form {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto;
  gap: 10px;
}

#form-tarefa button {
  grid-column: 1 / -1;
  justify-self: center;
  width: auto;
  padding: 10px 20px;
}

input {
  background-color: #333;
  color: var(--text-color);
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: 4px;
  width: 100%;
  box-sizing: border-box;
}

button {
  background-color: var(--primary-color);
  color: #fff;
  padding: 10px 15px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  background-color: #0056a3;
}

.calcular-btn {
  width: fit-content;
  margin-top: 1rem;
  background-color: var(--primary-color);
}

.calcular-btn:hover {
  background-color: #0056a3;
}

.task-list {
  margin-top: 1rem;
}

.task-item,
.result-item {
  background-color: #333;
  padding: 1rem;
  margin-bottom: 0.5rem;
  border-radius: 4px;
  border-left: 4px solid var(--primary-color);
}

.result-item.late {
  border-left-color: var(--late-color);
}
.result-item.on-time {
  border-left-color: var(--on-time-color);
}

.late .lateness,
.on-time .lateness {
  font-weight: bold;
}
.late .lateness {
  color: var(--late-color);
}
.on-time .lateness {
  color: var(--on-time-color);
}