.brief-page {
  width: min(980px, 100%);
}

.brief-hero {
  margin-bottom: var(--space-xl);
}

.brief-hero h1 {
  max-width: 100%;
}

.brief-hero p {
  margin: 0.7rem 0 0;
  max-width: 44rem;
  font-size: var(--font-size-lg);
}

.brief-form {
  display: grid;
  gap: var(--space-md);
}

.brief-section {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
  display: grid;
  gap: 0.8rem;
}

.brief-section h2 {
  margin: 0;
  font-size: clamp(1.15rem, 1.5vw, 1.4rem);
  max-width: 100%;
}

label,
fieldset {
  display: grid;
  gap: 0.35rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.5;
}

fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.72);
}

legend {
  padding: 0 0.3rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.7rem;
  font: inherit;
  color: var(--color-text-primary);
  background: #fff;
  transition: border-color var(--motion-fast), box-shadow var(--motion-fast);
}

input:focus-visible,
textarea:focus-visible {
  outline: none;
  border-color: rgba(100, 120, 107, 0.65);
  box-shadow: 0 0 0 3px rgba(100, 120, 107, 0.14);
}

textarea {
  resize: vertical;
}

fieldset label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.92rem;
}

fieldset input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.brief-submit {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-sm);
  padding: 1rem;
  display: grid;
  gap: 0.6rem;
}

.submit-btn {
  justify-self: start;
  min-width: 12rem;
  border: 0;
}

#brief-status {
  margin: 0;
  min-height: 1.25rem;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

@media (max-width: 760px) {
  .brief-page {
    width: 100%;
  }

  .brief-section,
  .brief-submit {
    padding: 0.8rem;
  }

  .brief-hero {
    margin-bottom: var(--space-lg);
  }

  .brief-hero p {
    font-size: var(--font-size-md);
  }

  .submit-btn {
    width: 100%;
    justify-self: stretch;
  }
}