/* --- 1. VARIABLES & THEME --- */
    #mppcx_calculator_wrapper {
      --primary-color: #0B1F51;    /* Navy */
      --text-color: #2B3445;       /* Body Text */
      --hover-color: #AFC8FF;      /* Light Blue Hover */
      --bg-color: #F8FAFC;
      --white: #FFFFFF;
      --border-color: #E2E8F0;
      
      --success-color: #10B981;    /* Green */
      --success-bg: #DCFCE7;       
      --warning-color: #F59E0B;    /* Amber */
      --warning-bg: #FEF3C7;
      --danger-color: #EF4444;     /* Red */
      --danger-bg: #FEF2F2;
      --info-bg: #EFF6FF;
      --info-text: #1E40AF;
      
      font-family: 'Inter', sans-serif;
      background-color: var(--bg-color);
      color: var(--text-color);
      line-height: 1.6;
      padding: 40px 20px;
      -webkit-font-smoothing: antialiased;
    }

    #mppcx_calculator_wrapper * { box-sizing: border-box; margin: 0; padding: 0; }

    /* --- 2. LAYOUT --- */
    #mppcx_calculator_wrapper .mppcx_calculator-container {
      max-width: 1100px;
      margin: 0 auto;
      background: var(--white);
      border-radius: 12px;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.07);
      border: 1px solid var(--border-color);
      overflow: hidden;
    }

    #mppcx_calculator_wrapper .mppcx_calculator-grid {
      display: grid;
      grid-template-columns: 1fr 1.3fr;
      min-height: 600px;
    }

    #mppcx_calculator_wrapper .mppcx_input-section, #mppcx_calculator_wrapper .mppcx_results-section { padding: 35px; }

    #mppcx_calculator_wrapper .mppcx_input-section {
      background-color: #ffffff;
      border-right: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
    }

    #mppcx_calculator_wrapper .mppcx_results-section {
      background-color: #fafbfd;
      display: flex;
      flex-direction: column;
      min-width: 0;
      position: relative;
    }
    
    #mppcx_calculator_wrapper .mppcx_section-title {
      color: var(--primary-color);
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 25px;
      padding-bottom: 10px;
      border-bottom: 2px solid var(--border-color);
      display: flex;
      /* FIX: Align left to prevent title shift */
      justify-content: flex-start;
      align-items: center;
    }

    /* --- 3. INPUTS & CONTROLS --- */
    #mppcx_calculator_wrapper .mppcx_input-group { margin-bottom: 20px; position: relative; }
    
    #mppcx_calculator_wrapper .mppcx_input-row {
        display: flex;
        gap: 15px;
        margin-bottom: 15px;
    }
    #mppcx_calculator_wrapper .mppcx_input-row .mppcx_input-group {
        margin-bottom: 0;
        flex: 1;
    }

    #mppcx_calculator_wrapper .mppcx_input-group label {
      display: block; 
      margin-bottom: 8px;
      font-weight: 700; 
      color: var(--primary-color);
      font-size: 13px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    
    #mppcx_calculator_wrapper .mppcx_group-label {
        font-size: 14px;
        font-weight: 800;
        color: var(--text-color);
        margin-bottom: 10px;
        display: block;
        border-bottom: 1px dashed var(--border-color);
        padding-bottom: 5px;
    }

    #mppcx_calculator_wrapper .mppcx_input-wrapper { position: relative; width: 100%; }

    #mppcx_calculator_wrapper .mppcx_input-field,
    #mppcx_calculator_wrapper .mppcx_input-wrapper input {
        width: 100%;
        padding: 12px 12px 12px 15px;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        font-size: 16px; 
        background-color: var(--white);
        font-family: 'Inter', sans-serif;
        color: var(--primary-color);
        font-weight: 500;
        transition: border-color 0.2s;
        outline: none;
    }

    #mppcx_calculator_wrapper .mppcx_input-field:focus,
    #mppcx_calculator_wrapper .mppcx_input-wrapper input:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 3px rgba(11, 31, 81, 0.1);
    }

    /* Error State */
    #mppcx_calculator_wrapper .mppcx_input-wrapper.mppcx_error input {
        border-color: var(--danger-color);
        background-color: var(--danger-bg);
    }

    #mppcx_calculator_wrapper .mppcx_error-message {
        color: var(--danger-color);
        font-size: 13px;
        margin-top: 10px;
        padding: 10px;
        background: var(--danger-bg);
        border-radius: 6px;
        display: none; 
    }

    /* Action Buttons */
    #mppcx_calculator_wrapper .mppcx_action-buttons { 
        margin-top: auto; 
        padding-top: 20px; 
        display: grid; 
        gap: 15px; 
        grid-template-columns: 2fr 1fr; 
    }
    
    #mppcx_calculator_wrapper button {
        padding: 14px;
        border-radius: 8px;
        font-weight: 600;
        font-size: 16px;
        cursor: pointer;
        border: none;
        transition: transform 0.1s, background-color 0.2s;
    }

    #mppcx_calculator_wrapper .mppcx_primary-btn {
      background-color: var(--primary-color); 
      color: white; 
    }
    #mppcx_calculator_wrapper .mppcx_primary-btn:hover { background-color: #1a3a8a; }

    #mppcx_calculator_wrapper .mppcx_secondary-btn {
      background-color: white; 
      color: var(--text-color); 
      border: 1px solid var(--border-color); 
    }
    #mppcx_calculator_wrapper .mppcx_secondary-btn:hover { background-color: #F1F5F9; border-color: var(--primary-color); }

    #mppcx_calculator_wrapper button:active { transform: translateY(1px); }

    /* --- 4. RESULTS UI --- */
    #mppcx_calculator_wrapper .mppcx_hero-card {
        background-color: var(--white);
        border-radius: 8px;
        border: 1px solid var(--border-color);
        border-left: 5px solid var(--primary-color);
        margin-bottom: 25px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
        position: relative;
    }

    #mppcx_calculator_wrapper .mppcx_hero-main {
        padding: 25px;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    #mppcx_calculator_wrapper .mppcx_hero-label { font-size: 13px; color: var(--primary-color); font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
    #mppcx_calculator_wrapper .mppcx_hero-value { font-size: 38px; font-weight: 800; color: var(--primary-color); margin-bottom: 5px; line-height: 1; }
    #mppcx_calculator_wrapper .mppcx_hero-subtext { font-size: 13px; color: #64748B; font-weight: 500; }

    /* Breakdown Box */
    #mppcx_calculator_wrapper .mppcx_breakdown-box {
        background: var(--white);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        overflow: hidden;
        margin-bottom: 20px;
    }
    
    #mppcx_calculator_wrapper .mppcx_breakdown-header {
        background: #F1F5F9;
        padding: 12px 20px;
        font-size: 13px;
        font-weight: 700;
        color: var(--primary-color);
        text-transform: uppercase;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    #mppcx_calculator_wrapper .mppcx_step-toggle-btn {
        background: none;
        border: none;
        color: var(--primary-color);
        font-size: 12px;
        text-decoration: underline;
        cursor: pointer;
        padding: 0;
        font-weight: 600;
    }
    #mppcx_calculator_wrapper .mppcx_step-toggle-btn:hover { color: var(--text-color); }

    #mppcx_calculator_wrapper .mppcx_step-content {
        padding: 20px;
        transition: all 0.3s ease;
    }

    #mppcx_calculator_wrapper .mppcx_step-row {
        margin-bottom: 15px;
        padding-bottom: 15px;
        border-bottom: 1px solid #F1F5F9;
    }
    #mppcx_calculator_wrapper .mppcx_step-row:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
    
    #mppcx_calculator_wrapper .mppcx_math-block {
        font-family: 'Courier New', Courier, monospace;
        background: #F8FAFC;
        padding: 12px;
        border-radius: 6px;
        margin-top: 8px;
        font-weight: 600;
        color: var(--text-color);
        border: 1px solid #E2E8F0;
        /* FIX: Smaller font to prevent wrapping/overflow, no slider */
        font-size: 13px;
    }

    /* Chart Box */
    #mppcx_calculator_wrapper .mppcx_chart-box {
        background: white;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 15px;
        height: 300px;
        position: relative;
        display: flex;
        flex-direction: column;
    }
    
    #mppcx_calculator_wrapper .mppcx_chart-controls {
        display: flex;
        align-items: center;
        justify-content: flex-end;
        margin-bottom: 10px;
        font-size: 13px;
        color: #64748B;
        flex-wrap: wrap;
        gap: 10px;
    }

    #mppcx_calculator_wrapper .mppcx_chart-controls label {
        display: flex;
        align-items: center;
        gap: 6px;
        cursor: pointer;
        user-select: none;
        font-weight: 600;
        color: var(--primary-color);
    }
    
    #mppcx_calculator_wrapper .mppcx_chart-help-text {
        font-size: 12px;
        color: #64748B;
        background: #F1F5F9;
        padding: 2px 6px;
        border-radius: 4px;
        border: 1px solid #E2E8F0;
    }

    #mppcx_calculator_wrapper .mppcx_chart-canvas-wrapper {
        flex: 1;
        position: relative;
        min-height: 0;
    }

    #mppcx_calculator_wrapper .mppcx_chart-caption {
        text-align: center;
        font-size: 0.85rem;
        color: #64748B;
        margin-top: 10px;
        font-style: italic;
    }

    /* Helper/Empty State */
    #mppcx_calculator_wrapper .mppcx_empty-state {
        text-align: center;
        color: #94A3B8;
        padding: 40px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        height: 100%;
    }
    #mppcx_calculator_wrapper .mppcx_results-container {
        display: none;
        animation: fadeIn 0.4s ease-in-out;
    }
    @keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

    /* Mobile & Responsive */
    @media (max-width: 900px) {
      #mppcx_calculator_wrapper .mppcx_calculator-grid { grid-template-columns: 1fr; }
      #mppcx_calculator_wrapper .mppcx_input-section { border-right: none; border-bottom: 1px solid var(--border-color); padding: 25px; }
      #mppcx_calculator_wrapper .mppcx_results-section { padding: 25px; }
      #mppcx_calculator_wrapper .mppcx_input-row { flex-direction: row; } 
    }
    @media (max-width: 480px) {
        #mppcx_calculator_wrapper .mppcx_input-row { flex-direction: column; gap: 0; }
        #mppcx_calculator_wrapper .mppcx_input-row .mppcx_input-group { margin-bottom: 15px; }
    }