.fraction-tool {
  background: #ffffff;

  border: 1px solid var(--math-line);
  border-radius: 18px;

  box-shadow: var(--math-shadow);

  overflow: hidden;
}


.fraction-tool-head {
  display: flex;
  align-items: start;
  justify-content: space-between;

  gap: 20px;

  padding: 25px 28px 20px;

  border-bottom: 1px solid var(--math-line);
}


.fraction-tool-head h1 {
  margin: 0 0 7px;

  font-size: 30px;
}


.fraction-tool-head p {
  margin: 0;

  color: var(--math-text-soft);

  font-size: 13px;
  line-height: 1.7;
}


.fraction-grade {
  flex: 0 0 auto;

  padding: 6px 9px;

  background: var(--math-elementary-soft);

  border-radius: 8px;

  color: #287a51;

  font-size: 11px;
  font-weight: 800;
}


.fraction-workspace {
  display: grid;

  grid-template-columns:
    minmax(0, 1.4fr)
    minmax(300px, 0.8fr);

  gap: 0;
}


.fraction-input-panel {
  min-width: 0;

  padding: 25px 28px;

  border-right: 1px solid var(--math-line);
}


.fraction-input-panel h2 {
  margin: 0 0 20px;

  font-size: 16px;
}


.fraction-expression {
  width: 100%;

  display: flex;
  align-items: center;
  justify-content: center;

  gap: 22px;
}


.fraction-input {
  width: 105px;

  display: flex;
  flex-direction: column;
  align-items: stretch;
}


.fraction-input input {
  width: 100%;
  height: 48px;

  padding: 4px 8px;

  border: 1px solid var(--math-line);
  border-radius: 8px;

  background: #ffffff;

  color: var(--math-text);

  text-align: center;

  font-size: 22px;
  font-weight: 700;

  outline: none;
}


.fraction-input input:focus {
  border-color: var(--math-primary);

  box-shadow:
    0 0 0 3px
    rgba(47, 111, 237, 0.1);
}


.fraction-line {
  width: 100%;
  height: 2px;

  margin: 6px 0;

  background: var(--math-text);
}


#operator {
  flex: 0 0 auto;

  width: 78px;
  min-width: 78px;
  height: 54px;

  padding: 0 12px;

  border: 1px solid var(--math-line);
  border-radius: 9px;

  background: #ffffff;

  color: var(--math-text);

  text-align: center;

  font-size: 22px;
  font-weight: 800;

  cursor: pointer;
}


.fraction-actions {
  display: flex;
  justify-content: center;

  gap: 8px;

  margin-top: 22px;
}


.fraction-actions button {
  min-height: 44px;

  border: 0;
  border-radius: 9px;

  font-weight: 800;

  cursor: pointer;
}


.fraction-calculate {
  min-width: 155px;

  background: var(--math-primary);

  color: #ffffff;
}


.fraction-calculate:hover {
  filter: brightness(0.96);
}


.fraction-clear {
  min-width: 76px;

  background: #eef1f6;

  color: #566176;
}


.fraction-error {
  margin: 14px 0 0;

  color: #c0392b;

  text-align: center;

  font-size: 12px;
  font-weight: 700;
}


.fraction-result-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;

  min-height: 255px;

  padding: 24px;

  background: #f8faff;
}


.fraction-result-label {
  margin-bottom: 8px;

  color: var(--math-text-soft);

  font-size: 12px;
  font-weight: 800;
}


.fraction-result {
  color: var(--math-primary);

  font-size: 38px;
  font-weight: 900;
}


.fraction-mixed-result {
  min-height: 26px;

  margin-top: 9px;

  color: var(--math-text-soft);

  font-size: 16px;
  font-weight: 700;
}


.fraction-normalize-button {
  min-height: 38px;

  margin-top: 14px;
  padding: 0 14px;

  background: #ffffff;
  color: var(--math-primary);

  border: 1px solid #b9cdf7;
  border-radius: 8px;

  font-size: 12px;
  font-weight: 800;

  cursor: pointer;
}


.fraction-normalize-button:hover {
  background: var(--math-primary-soft);
}


.fraction-normalized-result {
  width: 100%;

  margin-top: 12px;
  padding: 12px;

  background: #ffffff;

  border: 1px solid var(--math-line);
  border-radius: 10px;

  text-align: center;
}


.fraction-normalized-label {
  display: block;

  margin-bottom: 5px;

  color: var(--math-text-soft);

  font-size: 11px;
  font-weight: 700;
}


.fraction-normalized-value {
  display: block;

  color: var(--math-text);

  font-size: 22px;
  font-weight: 900;
}


.fraction-normalized-note {
  display: block;

  margin-top: 5px;

  color: var(--math-text-soft);

  font-size: 10px;
}


.fraction-steps {
  padding: 22px 28px 27px;

  border-top: 1px solid var(--math-line);
}


.fraction-steps-head {
  margin-bottom: 12px;
}


.fraction-steps-head h2 {
  margin: 0;

  font-size: 16px;
}


.fraction-steps-list {
  display: grid;

  gap: 7px;
}


.fraction-step {
  display: flex;

  gap: 12px;

  padding: 10px 12px;

  background: #f7f9fc;

  border-radius: 9px;
}


.fraction-step-number {
  flex: 0 0 auto;

  width: 24px;
  height: 24px;

  display: inline-flex;
  align-items: center;
  justify-content: center;

  background: var(--math-primary-soft);

  border-radius: 50%;

  color: var(--math-primary);

  font-size: 11px;
  font-weight: 900;
}


.fraction-step-text {
  color: #43506a;

  font-size: 13px;
  line-height: 1.7;
}


.fraction-info-grid {
  display: grid;

  grid-template-columns:
    repeat(2, minmax(0, 1fr));

  gap: 10px;

  margin-top: 20px;
}


.fraction-info-card {
  padding: 18px;

  background: #ffffff;

  border: 1px solid var(--math-line);
  border-radius: 13px;
}


.fraction-info-card h2 {
  margin: 0 0 8px;

  font-size: 15px;
}


.fraction-info-card p {
  margin: 0;

  color: var(--math-text-soft);

  font-size: 12px;
  line-height: 1.7;
}


@media (max-width: 760px) {

  .fraction-tool-head {
    padding: 20px 18px;
  }


  .fraction-workspace {
    grid-template-columns: 1fr;
  }


  .fraction-input-panel {
    padding: 22px 18px;

    border-right: 0;
    border-bottom: 1px solid var(--math-line);
  }


  .fraction-result-panel {
    min-height: 190px;
  }


  .fraction-steps {
    padding: 20px 18px;
  }

}


@media (max-width: 520px) {

  .fraction-tool-head h1 {
    font-size: 26px;
  }


  .fraction-grade {
    display: none;
  }


  .fraction-input-panel {
    padding-left: 12px;
    padding-right: 12px;
  }


  .fraction-expression {
    justify-content: space-between;

    gap: 8px;
  }


  .fraction-input {
    flex: 1 1 0;

    width: auto;
    max-width: 96px;
  }


  .fraction-input input {
    height: 44px;

    font-size: 18px;
  }


  #operator {
    width: 72px;
    min-width: 72px;
    height: 50px;

    padding-left: 12px;
    padding-right: 12px;

    font-size: 20px;
  }


  .fraction-actions {
    margin-top: 20px;
  }


  .fraction-calculate {
    min-width: 145px;
  }


  .fraction-result {
    font-size: 32px;
  }


  .fraction-normalized-value {
    font-size: 20px;
  }


  .fraction-info-grid {
    grid-template-columns: 1fr;
  }

}


@media (max-width: 380px) {

  .fraction-expression {
    gap: 5px;
  }


  .fraction-input {
    max-width: 84px;
  }


  #operator {
    width: 66px;
    min-width: 66px;

    padding-left: 9px;
    padding-right: 9px;
  }

}