.brief-page {
  min-height: 100vh;
  background: #f8fbff;
}

.brief-hero {
  padding: 70px 0;
}

.brief-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr);
  gap: 28px;
  align-items: start;
}

.brief-copy h1 {
  margin: 18px 0;
  color: #0b1226;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1.04;
}

.brief-copy p {
  max-width: 680px;
  color: #66708a;
  font-size: 18px;
  font-weight: 500;
}

.brief-form {
  display: grid;
  gap: 14px;
  padding: 26px;
  border: 1px solid #dce6f2;
  border-radius: 22px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 18px 48px rgba(18, 38, 80, .1);
}

.brief-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.brief-form label,
.brief-checks span {
  display: grid;
  gap: 8px;
  color: #17223b;
  font-weight: 500;
}

.brief-form input,
.brief-form select,
.brief-form textarea {
  width: 100%;
  border: 1px solid #dce6f2;
  border-radius: 12px;
  background: #f8fbff;
  color: #0b1226;
  outline: none;
  font: inherit;
}

.brief-form input,
.brief-form select {
  min-height: 48px;
  padding: 0 14px;
}

.brief-form textarea {
  min-height: 140px;
  padding: 14px;
  resize: vertical;
}

.brief-checks {
  display: grid;
  gap: 10px;
  padding: 16px;
  border-radius: 16px;
  background: #f4f8ff;
}

.brief-checks label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.brief-checks input {
  width: 18px;
  min-height: 18px;
}

.brief-hidden {
  position: absolute;
  left: -9999px;
}

.brief-success,
.brief-error {
  padding: 18px;
  border-radius: 16px;
}

.brief-success {
  color: #08734f;
  background: #e3f8ee;
}

.brief-error {
  color: #9b1c22;
  background: #fff0f1;
}

@media (max-width: 900px) {
  .brief-grid,
  .brief-row {
    grid-template-columns: 1fr;
  }
}