.is-rab {
  --rab-border: #d8dde3;
  --rab-soft: #f6f8fa;
  --rab-text: #1f2933;
  --rab-muted: #5b6673;
  --rab-good: #eef8f0;
  --rab-warn: #fff7e6;
  --rab-bad: #fff0f0;
  color: var(--rab-text);
  max-width: 1100px;
  margin: 0 auto;
  font: inherit;
}
.is-rab * { box-sizing: border-box; }
.is-rab__intro { margin-bottom: 1.25rem; }
.is-rab__eyebrow { font-size: .86rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--rab-muted); margin-bottom: .35rem; }
.is-rab__intro h2 { margin: 0 0 .55rem; line-height: 1.15; }
.is-rab__intro p:last-child { margin-bottom: 0; max-width: 850px; }
.is-rab__form { border: 1px solid var(--rab-border); border-radius: 16px; padding: 1rem; background: #fff; box-shadow: 0 8px 26px rgba(30,40,50,.06); }
.is-rab__grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: .9rem; }
.is-rab label > span { display: block; font-weight: 650; margin-bottom: .35rem; }
.is-rab input[type="text"], .is-rab input[type="number"] { width: 100%; border: 1px solid #b9c2cc; border-radius: 10px; padding: .72rem .78rem; font: inherit; background: #fff; }
.is-rab input:focus { outline: 3px solid rgba(70,120,180,.18); border-color: #557ea8; }
.is-rab small { display: block; color: var(--rab-muted); margin-top: .28rem; line-height: 1.35; }
.is-rab__wide { display: block; margin-top: .9rem; }
.is-rab__checks { display: grid; gap: .55rem; margin-top: .95rem; }
.is-rab__check { display: flex; gap: .6rem; align-items: flex-start; padding: .7rem .8rem; border-radius: 10px; background: var(--rab-soft); }
.is-rab__check input { margin-top: .2rem; flex: 0 0 auto; }
.is-rab__check span { font-weight: 500 !important; margin: 0 !important; }
.is-rab__actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1rem; }
.is-rab button { border-radius: 10px; padding: .72rem 1rem; font: inherit; font-weight: 700; cursor: pointer; }
.is-rab__primary { border: 1px solid #263746; background: #263746; color: #fff; }
.is-rab__secondary { border: 1px solid #aeb8c2; background: #fff; color: #263746; }
.is-rab__results { margin-top: 1.2rem; }
.is-rab__card { border: 1px solid var(--rab-border); border-radius: 16px; background: #fff; padding: 1rem; margin: 0 0 1rem; }
.is-rab__card h3 { margin: 0 0 .55rem; }
.is-rab__card p { margin: .45rem 0; }
.is-rab__status { border-left: 5px solid #8595a5; }
.is-rab__status--good { background: var(--rab-good); border-left-color: #4f8a5b; }
.is-rab__status--warn { background: var(--rab-warn); border-left-color: #b98622; }
.is-rab__status--bad { background: var(--rab-bad); border-left-color: #b94a48; }
.is-rab__metrics { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: .75rem; margin-top: .8rem; }
.is-rab__metric { background: var(--rab-soft); border-radius: 12px; padding: .8rem; }
.is-rab__metric strong { display: block; font-size: 1.45rem; line-height: 1.1; }
.is-rab__metric span { display: block; color: var(--rab-muted); margin-top: .2rem; font-size: .92rem; }
.is-rab__table-wrap { overflow-x: auto; margin-top: .75rem; }
.is-rab table { width: 100%; border-collapse: collapse; min-width: 720px; }
.is-rab th, .is-rab td { border: 1px solid #d8dde3; padding: .55rem .6rem; text-align: center; vertical-align: middle; }
.is-rab th { background: #f2f5f7; font-weight: 700; }
.is-rab td:first-child, .is-rab th:first-child { text-align: left; position: sticky; left: 0; background: #fff; z-index: 1; }
.is-rab th:first-child { background: #f2f5f7; }
.is-rab__teacher-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: .7rem; margin-top: .7rem; }
.is-rab__teacher { border: 1px solid var(--rab-border); border-radius: 12px; padding: .75rem; background: #fbfcfd; }
.is-rab__teacher strong { display:block; margin-bottom:.25rem; }
.is-rab__teacher ul { margin: .35rem 0 0 1.1rem; }
.is-rab__teacher li { margin: .15rem 0; }
.is-rab__result-actions { display:flex; flex-wrap:wrap; gap:.6rem; margin-top:.8rem; }
.is-rab__notice { font-size:.92rem; color:var(--rab-muted); }
.is-rab__bullets { margin: .5rem 0 0 1.15rem; }
.is-rab__bullets li { margin: .28rem 0; }
@media (max-width: 760px) {
  .is-rab__grid { grid-template-columns: 1fr; }
  .is-rab__metrics { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .is-rab__teacher-grid { grid-template-columns: 1fr; }
  .is-rab__form, .is-rab__card { border-radius: 12px; }
}
@media print {
  .is-rab__form, .is-rab__result-actions, .is-rab__intro { display:none !important; }
  .is-rab__card { break-inside: avoid; box-shadow:none; }
}