.calc-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .input-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .input-group label {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--color-text-secondary);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .input-with-affix {
      position: relative;
    }

    .input-with-affix input,
    .input-group > input[type="number"] {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 0.98rem;
      color: var(--color-text);
      background: var(--color-surface);
      outline: none;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
      -moz-appearance: textfield;
    }

    .input-with-affix input:focus,
    .input-group > input[type="number"]:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px var(--color-primary-light);
    }

    .input-with-affix input::-webkit-inner-spin-button,
    .input-with-affix input::-webkit-outer-spin-button,
    .input-group > input[type="number"]::-webkit-inner-spin-button,
    .input-group > input[type="number"]::-webkit-outer-spin-button {
      -webkit-appearance: none;
      margin: 0;
    }

    .affix {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      color: var(--color-text-muted);
      font-weight: 600;
      pointer-events: none;
    }

    .affix.left { left: 12px; }
    .affix.right { right: 12px; }
    .input-with-affix.prefix input { padding-left: 28px; }
    .input-with-affix.suffix input { padding-right: 28px; }

    .results-section {
      display: none;
      margin-top: 26px;
      padding-top: 24px;
      border-top: 1px solid var(--color-border-light);
    }

    .results-section.visible {
      display: block;
    }

    .hero-result {
      border: 1px solid var(--color-primary-subtle);
      background: var(--color-primary-light);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      margin-bottom: 12px;
    }

    .hero-result .label {
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--color-primary);
      margin-bottom: 6px;
    }

    .hero-result .value {
      font-family: var(--font-mono);
      font-size: 2rem;
      font-weight: 700;
      color: var(--color-primary);
    }

    .result-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .result-card {
      border: 1px solid var(--color-border-light);
      border-radius: var(--radius-sm);
      background: var(--color-surface);
      padding: 12px;
      text-align: center;
    }

    .result-card .label {
      font-size: 0.72rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--color-text-muted);
      margin-bottom: 6px;
      font-weight: 600;
    }

    .result-card .value {
      font-family: var(--font-mono);
      font-size: 1rem;
      font-weight: 700;
      color: var(--color-text);
    }

    .warning {
      margin-top: 12px;
      padding: 12px;
      border-radius: var(--radius-sm);
      border: 1px solid #fecaca;
      background: #fef2f2;
      color: #991b1b;
      font-size: 0.88rem;
      display: none;
    }

    .warning.visible {
      display: block;
    }

    @media (max-width: 900px) {
      .calc-form { grid-template-columns: 1fr; }
      .result-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 520px) {
      .result-grid { grid-template-columns: 1fr; }
      .hero-result .value { font-size: 1.6rem; }
    }