.otr-engine-suite {
  width: 100%;
  max-width: 900px;
  padding: 28px;
  background: #ffffff;
  border: 1px solid #d7e0e8;
  border-radius: 8px;
  box-sizing: border-box;
}

.otr-engine-suite * {
  box-sizing: border-box;
}

.otr-eng-header {
  margin-bottom: 25px;
}

.otr-eng-header h2,
.otr-eng-tool-title {
  margin: 0 0 8px 0;
  color: #0b2540;
}

.otr-eng-header p,
.otr-eng-description,
.otr-eng-note,
.otr-eng-formula {
  color: #53636f;
  line-height: 1.6;
}

.otr-eng-header p,
.otr-eng-description {
  margin: 0;
}

.otr-eng-selector {
  margin-bottom: 28px;
}

.otr-engine-suite label {
  display: block;
  margin-bottom: 7px;
  color: #0b2540;
  font-weight: 700;
}

.otr-engine-suite input,
.otr-engine-suite select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid #bcc9d3;
  border-radius: 5px;
  background: #ffffff;
  font-size: 16px;
  line-height: 1.4;
}

.otr-engine-suite input:focus,
.otr-engine-suite select:focus {
  outline: 2px solid rgba(11, 37, 64, 0.14);
  border-color: #0b2540;
}

.otr-eng-description {
  margin-bottom: 22px;
}

.otr-eng-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.otr-eng-result {
  margin-top: 24px;
  padding: 18px 20px;
  background: #eef4f8;
  border-left: 4px solid #0b2540;
  border-radius: 4px;
}

.otr-eng-result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.otr-eng-result-grid.otr-eng-result-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.otr-eng-result span {
  display: block;
  margin-bottom: 5px;
  color: #53636f;
  font-size: 14px;
}

.otr-eng-result strong {
  display: block;
  color: #0b2540;
  font-size: 21px;
  overflow-wrap: anywhere;
}

.otr-eng-note,
.otr-eng-formula {
  margin-top: 12px;
  font-size: 14px;
}

.otr-eng-formula {
  padding: 10px 12px;
  background: #f7f9fb;
  border: 1px solid #e2e8ee;
  border-radius: 5px;
}

.otr-eng-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.otr-eng-actions button {
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 5px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.otr-eng-copy {
  border: 1px solid #0b2540;
  background: #0b2540;
  color: #ffffff;
}

.otr-eng-copy:hover {
  background: #143d62;
}

.otr-eng-reset {
  border: 1px solid #0b2540;
  background: #ffffff;
  color: #0b2540;
}

.otr-eng-reset:hover {
  background: #f2f6f9;
}

.otr-eng-js-warning {
  padding: 12px;
  border: 1px solid #d7e0e8;
  border-radius: 5px;
}

@media (max-width: 700px) {
  .otr-engine-suite {
    padding: 20px;
  }

  .otr-eng-grid,
  .otr-eng-result-grid,
  .otr-eng-result-grid.otr-eng-result-three {
    grid-template-columns: 1fr;
  }

  .otr-eng-actions {
    flex-direction: column;
  }

  .otr-eng-actions button {
    width: 100%;
  }
}