section#rechner { 
  .calc-container {
    display: grid;
    grid-template-columns: 1fr 1.16fr;
    gap: 3rem;
    background: #222222;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid #444444;
    border-radius: 20px;
    padding: 3rem;
    margin-top: 2rem;
    box-shadow: var(--glass-shadow);
  }
  .calc-inputs { display: flex; flex-direction: column; gap: 2rem; }
  .calc-group { display: flex; flex-direction: column; gap: 0.75rem; }
  .calc-header-row { display: flex; justify-content: space-between; align-items: center; }
  .calc-label { font-family: 'Ubuntu', sans-serif; font-weight: 500; font-size: 0.85rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--muted); }
  .calc-badge { font-family: 'Ubuntu', sans-serif; font-weight: 500; font-size: 1.1rem; color: var(--accent-dark); background: rgba(211, 47, 47, 0.1); padding: 0.2rem 0.75rem; border-left: 3px solid var(--accent-dark); border-radius: 0 4px 4px 0; }
  .calc-slider { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; outline: none; transition: background 0.2s; }
  .calc-slider::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 20px; height: 20px; border-radius: 50%; background: var(--accent-dark); cursor: pointer; transition: transform 0.1s, background-color 0.2s, box-shadow 0.2s; box-shadow: 0 0 10px rgba(211,47,47,0.5); }
  .calc-slider::-webkit-slider-thumb:hover { background: var(--accent); transform: scale(1.15); box-shadow: 0 0 15px rgba(211,47,47,0.8); }
  .calc-slider::-moz-range-thumb { width: 20px; height: 20px; border: none; border-radius: 50%; background: var(--accent-dark); cursor: pointer; transition: transform 0.1s, background-color 0.2s; box-shadow: 0 0 10px rgba(211,47,47,0.5); }
  .calc-slider::-moz-range-thumb:hover { background: var(--accent); transform: scale(1.15); box-shadow: 0 0 15px rgba(211,47,47,0.8); }

  .calc-results {
    background: rgba(0,0,0,0.2);
    border: 1px solid #333333;
    border-radius: 16px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .calc-result-title { font-weight: 500; font-size: 1.1rem; color: var(--white); margin-bottom: 1.5rem; border-bottom: 2px solid var(--accent-dark); padding-bottom: 0.5rem; }
  .calc-row { display: flex; justify-content: space-between; align-items: center; padding: 0.8rem 0; border-bottom: 1px solid var(--line); gap: 0.3em; }
  .calc-row:last-of-type { border-bottom: none; }
  .calc-row.calc-row-highlight { margin-top: 0.5rem; border-top: 1px dashed var(--line); padding-top: 1rem; }
  .calc-row-label { font-size: 0.7rem; color: var(--muted); }
  .calc-row-value { font-weight: 500; font-size: 1.3rem; color: var(--white); }
  .calc-row-value.total-cost { color: var(--accent-dark); font-size: 1.8rem; font-weight: 700; text-shadow: 0 0 10px rgba(211,47,47,0.4); }
}

@media (min-width: 1281px) and (max-width: 1600px) {
  section#rechner {
    .calc-row {
      flex-direction: column;
    }
  }
}

@media (max-width: 1280px) {
  section#rechner {
    .calc-container {
      grid-template-columns: 1fr;
      gap: 2rem;
      padding: 1.5rem;
    }
    .calc-results {
      padding: 1.5rem;
    }
  }
}

@media (max-width: 512px) {
  section#rechner {
    .calc-row {
      flex-direction: column;
    }
  }
}