.container_body {
    background: rgb(107 142 173 / 30%);
    padding: 30px;
    width: 80%;
    margin: 30px auto;
    border-radius: 16px;
    border: 4px solid #548b85;
}

.container_body h2 {
    text-align: center;
    text-transform: uppercase;
    color: #3c5456;
    margin: 40px 0;
    font-size: 35px;
    font-weight: 700;
}

.kmm-wrapper {
    display: flex;
    gap: 2rem;
    max-width: 100%;
    margin: 2rem auto;
    font-family: 'Poppins', sans-serif;
    border: 4px solid transparent;
    border-image: linear-gradient(45deg, #ff6b6b, #f7d794, #1dd1a1) 1;
    border-radius: 16px;
    padding: 20px;
    transition: background 0.3s, color 0.3s;
    background: #e6f1ef;
}
.kmm-wrapper[data-theme="dark"] {
  background: #222;
  color: #eee;
}
.kmm-feature-panel,
.kmm-output-panel {
  flex: 1;
  padding: 1.5rem;
  border: 3px solid transparent;
  border-image: linear-gradient(135deg, #4d9eff, #a78bfa) 1;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
  transition: background 0.3s, color 0.3s;
}
.kmm-wrapper[data-theme="dark"] .kmm-feature-panel,
.kmm-wrapper[data-theme="dark"] .kmm-output-panel {
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}



.kmm-btn {
    display: inline-block;
    padding: 0.6rem 1.2rem;
    margin: 0.5rem 0.3rem 0;
    border: 2px solid #a78bfa;
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
    font-weight: 600;
    transition: background 0.2s, color 0.2s;
    margin-bottom: 18px;
}


.kmm-wrapper[data-theme="dark"] .kmm-btn {
  background: #444;
  border-color: #4d9eff;
  color: #eee;
}
.kmm-btn:hover {
  background: #a78bfa;
  color: #fff;
}

.kmm-info-slider {
  position: relative;
  overflow: hidden;
  height: 2.5rem;
  margin-bottom: 1rem;
}
.kmm-slide {
  position: absolute;
  width: 100%;
  padding: 0.5rem;
  opacity: 0;
  transform: translateY(100%);
  transition: all 0.4s ease;
  background: linear-gradient(135deg, #f0f0f0, #fafafa);
  border-radius: 6px;
}
.kmm-wrapper[data-theme="dark"] .kmm-slide {
  background: #333;
}
.kmm-active {
  opacity: 1;
  transform: translateY(0);
}
.kmm-slide-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
}
.kmm-prev { left: 0.5rem; }
.kmm-next { right: 0.5rem; }

.kmm-input-group {
  margin-bottom: 1rem;
}
.kmm-input-label {
  display: block;
  margin-bottom: 0.3rem;
  font-weight: 500;
}
.kmm-input-field {
  width: 100%;
  padding: 0.6rem;
  border: 2px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}
.kmm-options {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.kmm-option-range {
  flex: 1;
}
#precision-value {
  width: 2ch;
  text-align: center;
  display: inline-block;
}

.kmm-result-box {
  padding: 1rem;
  border: 2px dashed #a78bfa;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 1rem;
}
.kmm-history-box h4 {
  margin-bottom: 0.5rem;
}
.kmm-history-list {
  list-style: none;
  max-height: 150px;
  overflow-y: auto;
  padding-left: 1rem;
}
.kmm-history-list li {
  margin-bottom: 0.3rem;
}

/* ≤ 992px: stack panels vertically, reduce gaps */
@media (max-width: 992px) {
  .kmm-wrapper {
    flex-direction: column;
    gap: 1.5rem;
    padding: 16px;
  }
  .kmm-feature-panel,
  .kmm-output-panel {
    width: 100%;
    padding: 1.2rem;
  }
}

/* ≤ 768px: shrink fonts & buttons */
@media (max-width: 768px) {
  .container_body {
    width: 90%;
    padding: 20px;
  }
  .container_body h2 {
    font-size: 28px;
    margin: 30px 0;
  }
  .kmm-btn {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
  }
  .kmm-input-field {
    padding: 0.5rem;
    font-size: 0.95rem;
  }
  .kmm-slide-btn {
    font-size: 1rem;
  }
}

/* ≤ 600px: adjust sliders, history box height, input font */
@media (max-width: 600px) {
  .kmm-info-slider {
    height: 2rem;
  }
  .kmm-slide {
    padding: 0.4rem;
    font-size: 0.9rem;
  }
  .kmm-option-range {
    width: 100%;
  }
  .kmm-history-list {
    max-height: 120px;
  }
  .kmm-result-box {
    padding: 0.8rem;
  }
}

/* ≤ 400px: further compress padding & font sizes */
@media (max-width: 400px) {
  .container_body {
    padding: 15px;
  }
  .kmm-btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }
  .kmm-input-label,
  .kmm-option-label {
    font-size: 0.9rem;
  }
  .kmm-input-field {
    padding: 0.4rem;
    font-size: 0.9rem;
  }
  .kmm-slide-btn {
    font-size: 0.9rem;
  }
}