* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f6f8;
  color: #222;
}

.container {
  max-width: 1100px;
  margin: 30px auto;
  padding: 0 15px;
}

header {
  background: #2563eb;
  color: white;
  padding: 28px;
  border-radius: 12px;
  margin-bottom: 20px;
}

header h1 {
  margin: 0 0 8px;
}

header p {
  margin: 0;
}

.card {
  background: white;
  padding: 20px;
  border-radius: 12px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

.form-row,
.toolbar {
  display: flex;
  gap: 12px;
  align-items: end;
  flex-wrap: wrap;
}

input {
  padding: 11px;
  border: 1px solid #ccc;
  border-radius: 7px;
  font-size: 15px;
}

button {
  border: 0;
  border-radius: 7px;
  padding: 11px 16px;
  cursor: pointer;
  background: #2563eb;
  color: white;
  font-size: 14px;
}

button:hover {
  opacity: .9;
}

.secondary {
  background: #555;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  padding: 12px;
  border-bottom: 1px solid #ddd;
  text-align: left;
}

th {
  background: #f1f5f9;
}

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

.present {
  background: #16a34a;
}

.absent {
  background: #dc2626;
}

.delete {
  background: #555;
}

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

#message {
  font-weight: bold;
}

@media (max-width: 600px) {
  .form-row input,
  .form-row button,
  .toolbar input {
    width: 100%;
  }
}