/* Teacher Quiz Portal - light theme, mobile-first */
* { box-sizing: border-box; }
body {
  font-family: Verdana, "DejaVu Sans", sans-serif;
  font-size: 16px;
  line-height: 1.45;
  color: #23313f;
  background: #f4f6f8;
  margin: 0;
  padding: 0;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 16px; }
header {
  background: #1d4ed8;
  color: #fff;
  padding: 14px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
header h1 { font-size: 19px; margin: 0; font-weight: 600; }
header form { margin: 0; }
header button {
  background: #fff; color: #1d4ed8; border: none; padding: 6px 14px;
  border-radius: 6px; font-size: 14px; cursor: pointer;
}
h2 { font-size: 20px; margin: 18px 0 10px; }
.card {
  background: #fff; border-radius: 10px; padding: 18px;
  box-shadow: 0 1px 4px rgba(0,0,0,.08); margin-bottom: 16px;
}
label { display: block; font-weight: 600; margin: 14px 0 6px; }
fieldset {
  border: 1px solid #d7dde3; margin: 14px 0; padding: 6px 14px;
  border-radius: 8px;
}
fieldset legend { font-weight: 600; padding: 0 6px; }
fieldset label {
  display: flex; align-items: center; font-weight: 500; padding: 8px 0;
}
fieldset label input, fieldset label select { margin-right: 10px; }
select, input[type=text], input[type=password] {
  width: 100%; padding: 12px; font-size: 16px;
  border: 1px solid #b9c2cb; border-radius: 8px; background: #fff;
}
.btn {
  display: block; width: 100%; padding: 14px; margin-top: 18px;
  font-size: 18px; font-weight: 700;
  color: #fff; background: #1d4ed8; border: none; border-radius: 9px;
  cursor: pointer;
}
.btn:disabled { background: #93a9e8; cursor: wait; }
.btn-secondary {
  display: block; width: 100%; padding: 12px; margin-top: 8px;
  font-size: 15px; font-weight: 600;
  color: #fff; background: #55606b; border: none; border-radius: 9px;
  cursor: pointer;
}
.btn-secondary:disabled { background: #8a949d; }
a.btn-link {
  display: block; text-align: center; text-decoration: none;
}
.big-download {
  display: block; width: 100%; padding: 22px; text-align: center;
  font-size: 20px; font-weight: 700; color: #fff; background: #12805c;
  border: none; text-decoration: none; border-radius: 10px;
}
.flash { padding: 12px 14px; border-radius: 8px; margin: 12px 0; }
.flash-error { background: #fdecec; color: #8d1f1f; border: 1px solid #f3bcbc; }
.flash-info { background: #e8f1fd; color: #1d3f8f; border: 1px solid #b7d0f5; }
table.grid { width: 100%; border-collapse: collapse; background: #fff; }
table.grid th, table.grid td { padding: 10px 8px; border-bottom: 1px solid #e3e8ec; }
table.grid th { text-align: left; font-size: 14px; color: #55606b; }
.pill {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 14px;
}
.pill-queued { background: #fdf3d7; color: #8a6d00; }
.pill-running { background: #e8f1fd; color: #1d3f8f; }
.pill-ready { background: #ddf3e9; color: #0f5c42; }
.pill-error { background: #fdecec; color: #8d1f1f; }
.small { font-size: 13px; color: #55606b; }
.center { text-align: center; }
[hidden] { display: none !important; }