/* ========================================
       Loading Placeholder
       ======================================== */
  
    .loading-placeholder {
        text-align: center;
        padding: 80px 20px;
        color: var(--text-tertiary);
    }
  
    .loading-placeholder p {
        margin: 8px 0;
    }
  
    /* ========================================
       Buttons
       ======================================== */
  
    .btn-secondary, .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 10px 18px;
        border: none;
        border-radius: var(--radius-sm);
        cursor: pointer;
        font-size: 13px;
        font-weight: 500;
        transition: all var(--transition-fast);
    }
  
    .btn-secondary {
        background: var(--bg-tertiary);
        border: 1px solid var(--border-default);
        color: var(--text-primary);
    }
  
    .btn-secondary:hover {
        background: var(--bg-hover);
        border-color: var(--text-primary);
    }
  
    .btn-primary {
        background: var(--accent-gradient);
        color: white;
    }
  
    .btn-primary:hover {
        box-shadow: var(--shadow-glow);
    }
  
    .btn-danger {
        background: var(--danger);
        color: white;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 10px 18px;
        border: none;
        border-radius: var(--radius-sm);
        cursor: pointer;
        font-size: 13px;
        font-weight: 500;
        transition: all var(--transition-fast);
    }
  
    .btn-danger:hover {
        background: #dc2626;
    }
  
    /* ========================================
       Data Cards (Parameters/Errors)
       ======================================== */
  
    .data-cards {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
        gap: 16px;
        padding: 8px;
    }
  
    .data-card {
        background: var(--bg-secondary);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition-base);
    }
  
    .data-card:hover {
        border-color: var(--text-primary);
        box-shadow: var(--shadow-sm);
    }
  
    .data-card-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 12px 16px;
        background: var(--bg-tertiary);
        border-bottom: 1px solid var(--border-default);
        font-size: 14px;
        font-weight: 600;
        color: var(--text-primary);
    }
  
    .data-card-rw-type {
        font-size: 13px;
        font-weight: 500;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        background: var(--bg-hover);
        color: var(--text-secondary);
    }
  
    .data-card-body {
        padding: 12px 16px;
    }
  
    .data-row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 8px 0;
        border-bottom: 1px solid var(--border-subtle);
    }

    .data-row:first-child {
        padding-top: 0;
    }
  
    .data-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }

    .data-label {
        font-size: 13px;
        color: var(--text-secondary);
        flex: 1;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .data-value {
        font-size: 13px;
        font-weight: 500;
        color: var(--text-primary);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 200px;
    }

    .data-value-container {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .data-input {
        font-size: 13px;
        font-weight: 500;
        color: var(--text-primary);
        background: var(--bg-tertiary);
        border: 1px solid var(--border-default);
        border-radius: var(--radius-sm);
        padding: 4px 8px;
        width: 120px;
        text-align: right;
        transition: all var(--transition-fast);
    }

    .data-input:focus {
        outline: none;
        border-color: var(--text-primary);
        box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
    }

    .data-input:hover {
        border-color: var(--text-primary);
    }

    .data-unit {
        font-size: 13px;
        color: var(--text-secondary);
        white-space: nowrap;
    }