#apd-calc-nesbat {
    box-sizing: border-box;
    max-width: 520px;
    margin: 24px 0;
    padding: 20px;
    border: 1px solid #d8dee4;
    border-radius: 10px;
    background: #f9fbfc;
    font-family: Tahoma, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.8;
    color: #1f2937;
  }
  #apd-calc-nesbat *,
  #apd-calc-nesbat *::before,
  #apd-calc-nesbat *::after { box-sizing: border-box; }

  #apd-calc-nesbat .apd-calc-title {
    margin: 0 0 6px 0;
    font-size: 18px;
    font-weight: 700;
    color: #0f766e;
  }
  #apd-calc-nesbat .apd-calc-desc {
    margin: 0 0 16px 0;
    font-size: 13.5px;
    color: #6b7280;
  }
  #apd-calc-nesbat .apd-calc-row { margin-bottom: 14px; }
  #apd-calc-nesbat .apd-calc-label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 600;
  }
  #apd-calc-nesbat .apd-calc-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    text-align: right;
    background: #fff;
  }
  #apd-calc-nesbat .apd-calc-input:focus {
    outline: none;
    border-color: #0f766e;
    box-shadow: 0 0 0 2px rgba(15,118,110,0.15);
  }
  #apd-calc-nesbat .apd-calc-btn {
    width: 100%;
    padding: 11px 16px;
    background: #0f766e;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 14.5px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
  }
  #apd-calc-nesbat .apd-calc-btn:hover { background: #0d5f58; }
  #apd-calc-nesbat .apd-calc-error {
    color: #b91c1c;
    font-size: 13px;
    margin-top: 10px;
  }
  #apd-calc-nesbat .apd-calc-compare {
    display: flex;
    gap: 12px;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px dashed #cbd5e1;
  }
  #apd-calc-nesbat .apd-calc-compare-col {
    flex: 1;
    text-align: center;
    padding: 14px 10px;
    border-radius: 8px;
    background: #fef2f2;
  }
  #apd-calc-nesbat .apd-calc-compare-correct {
    background: #ecfdf5;
  }
  #apd-calc-nesbat .apd-calc-compare-label {
    display: block;
    font-size: 12.5px;
    color: #4b5563;
    margin-bottom: 8px;
  }
  #apd-calc-nesbat .apd-calc-compare-col strong {
    font-size: 22px;
    color: #1f2937;
  }
  #apd-calc-nesbat .apd-calc-note {
    margin-top: 12px;
    font-size: 13px;
    color: #92400e;
    background: #fffbeb;
    padding: 10px 12px;
    border-radius: 8px;
  }