html,
body {
  width: 100%;
  min-height: 100%;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f4f6f8;
  background-image: var(--page-bg-image, none);
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 20px;
}

input, button {
  padding: 10px;
  font-size: 16px;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin-top: 16px;
  background: white;
}

td, th {
  border: 1px solid #d0d7de;
  padding: 8px;
  text-align: center;
}

.grid-input {
  width: 100%;
  box-sizing: border-box;
}

button {
  cursor: pointer;
}

.correct {
  background: #d1fae5;
}

.wrong {
  background: #fee2e2;
}