/* --- 1. VARIABLES & THEME --- */
    #rlb_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;       /* Light Green Bg */
      --warning-color: #F59E0B;    /* Amber */
      --danger-color: #EF4444;     /* Red */
      
      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;
    }

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

    /* --- 2. LAYOUT --- */
    #rlb_calculator_wrapper .rlb_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);
    }

    #rlb_calculator_wrapper .rlb_calculator-grid {
      display: grid;
      grid-template-columns: 1fr 1.3fr;
      min-height: 750px;
    }

    #rlb_calculator_wrapper .rlb_input-section, 
    #rlb_calculator_wrapper .rlb_results-section { padding: 35px; }

    #rlb_calculator_wrapper .rlb_input-section {
      background-color: #ffffff;
      border-right: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      border-top-left-radius: 12px;
      border-bottom-left-radius: 12px;
    }

    #rlb_calculator_wrapper .rlb_results-section {
      background-color: #fafbfd;
      display: flex;
      flex-direction: column;
      border-top-right-radius: 12px;
      border-bottom-right-radius: 12px;
      /* Ensure charts don't overflow on resize */
      min-width: 0; 
    }

    #rlb_calculator_wrapper .rlb_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;
      justify-content: space-between;
      align-items: center;
    }

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

    #rlb_calculator_wrapper .rlb_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;
    }

    #rlb_calculator_wrapper .rlb_input-wrapper { position: relative; width: 100%; }

    #rlb_calculator_wrapper .rlb_input-wrapper input, 
    #rlb_calculator_wrapper .rlb_input-wrapper select {
      width: 100%;
      padding: 12px 12px 12px 15px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      /* Mobile Fix: 16px prevents iOS zoom-in on focus */
      font-size: 16px; 
      background-color: var(--white);
      transition: border-color 0.2s, box-shadow 0.2s;
      font-family: 'Inter', sans-serif;
      color: var(--primary-color);
      font-weight: 500;
    }

    /* Error Styling */
    #rlb_calculator_wrapper .rlb_input-wrapper.rlb_error input {
        border-color: var(--danger-color);
        background-color: #FEF2F2;
    }

    #rlb_calculator_wrapper .rlb_error-msg {
        color: var(--danger-color);
        font-size: 11px;
        margin-top: 5px;
        font-weight: 600;
        display: none; 
        animation: rlb_slideDown 0.2s ease-out;
    }

    @keyframes rlb_slideDown {
        from { opacity: 0; transform: translateY(-5px); }
        to { opacity: 1; transform: translateY(0); }
    }

    /* Date Input Specifics */
    #rlb_calculator_wrapper .rlb_input-wrapper input[type="date"] {
        appearance: none;
        -webkit-appearance: none;
        min-height: 47px;
        display: block;
        background-image: none; 
    }
    
    #rlb_calculator_wrapper .rlb_input-wrapper input[type="date"]::-webkit-calendar-picker-indicator {
        cursor: pointer;
        opacity: 0.6;
        transition: 0.2s;
    }
    #rlb_calculator_wrapper .rlb_input-wrapper input[type="date"]::-webkit-calendar-picker-indicator:hover {
        opacity: 1;
    }

    #rlb_calculator_wrapper .rlb_input-wrapper input[readonly] {
        background-color: #F1F5F9;
        font-weight: 700;
        color: #0B1F51;
        cursor: default;
        border-color: #CBD5E1;
    }
    
    #rlb_calculator_wrapper .rlb_input-wrapper input:focus, 
    #rlb_calculator_wrapper .rlb_input-wrapper select:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(11, 31, 81, 0.1);
    }

    #rlb_calculator_wrapper .rlb_helper-text {
        font-size: 11px;
        color: #64748B;
        margin-top: 5px;
        font-weight: 500;
    }

    /* Optional Sections */
    #rlb_calculator_wrapper .rlb_optional-header {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        font-weight: 700; 
        color: var(--primary-color);
        cursor: pointer;
        padding: 10px 0;
        user-select: none;
        border-top: 1px dashed var(--border-color);
        margin-top: 10px;
    }
    
    #rlb_calculator_wrapper .rlb_optional-header input[type="checkbox"] {
        accent-color: var(--primary-color);
        width: 16px;
        height: 16px;
        cursor: pointer;
    }

    #rlb_calculator_wrapper .rlb_optional-content {
        display: none;
        padding: 15px;
        background: #F1F5F9;
        border-radius: 8px;
        margin-bottom: 20px;
        border-left: 3px solid var(--primary-color);
    }

    /* Buttons */
    #rlb_calculator_wrapper .rlb_action-buttons { margin-top: auto; padding-top: 20px; display: grid; gap: 10px; grid-template-columns: 2fr 1fr; }
    
    #rlb_calculator_wrapper button {
      padding: 14px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 600;
      transition: all 0.2s;
      border: 1px solid transparent;
      width: 100%;
    }

    #rlb_calculator_wrapper #rlb_calculateBtn { background-color: var(--primary-color); color: white; font-size: 16px; }
    #rlb_calculator_wrapper #rlb_resetBtn { background-color: white; color: var(--text-color); border-color: var(--border-color); }
    #rlb_calculator_wrapper button:hover { transform: translateY(-1px); box-shadow: 0 4px 6px rgba(0,0,0,0.05); }

    /* --- 4. RESULTS UI --- */
    
    /* Hero Card */
    #rlb_calculator_wrapper .rlb_hero-card {
        background-color: var(--white);
        padding: 0;
        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);
        overflow: hidden;
    }

    #rlb_calculator_wrapper .rlb_hero-main {
        padding: 25px;
        text-align: center;
        border-bottom: 1px solid var(--border-color);
    }
    
    #rlb_calculator_wrapper .rlb_hero-label { font-size: 13px; color: var(--primary-color); font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
    #rlb_calculator_wrapper .rlb_hero-value { font-size: 38px; font-weight: 800; color: var(--primary-color); margin-bottom: 5px; letter-spacing: -1px; line-height: 1; }
    
    #rlb_calculator_wrapper .rlb_hero-subtext {
        font-size: 13px;
        color: #475569;
        margin-bottom: 15px;
        font-weight: 500;
    }

    /* Breakdown Grid */
    #rlb_calculator_wrapper .rlb_hero-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        background: #F8FAFC;
    }

    #rlb_calculator_wrapper .rlb_hero-box {
        padding: 15px;
        text-align: center;
        border-right: 1px solid #CBD5E1;
        border-top: 1px solid #E2E8F0;
    }
    #rlb_calculator_wrapper .rlb_hero-box:last-child { border-right: none; }

    #rlb_calculator_wrapper .rlb_hero-box-label { font-size: 11px; font-weight: 700; color: var(--primary-color); text-transform: uppercase; margin-bottom: 4px; }
    #rlb_calculator_wrapper .rlb_hero-box-val { font-size: 16px; font-weight: 700; color: #334155; }

    /* Comparison Table */
    #rlb_calculator_wrapper .rlb_comparison-wrapper {
        background: var(--white);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        margin-bottom: 25px;
        overflow: hidden;
        display: none; 
    }

    #rlb_calculator_wrapper .rlb_comp-header {
        background: #F1F5F9;
        padding: 15px 20px;
        border-bottom: 1px solid var(--border-color);
        font-size: 14px;
        font-weight: 700;
        color: var(--primary-color);
        text-transform: uppercase;
        display: flex;
        justify-content: space-between;
    }

    #rlb_calculator_wrapper .rlb_comp-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    #rlb_calculator_wrapper .rlb_comp-col { padding: 0; }
    #rlb_calculator_wrapper .rlb_comp-col.rlb_left { border-right: 2px solid #E2E8F0; } 
    
    #rlb_calculator_wrapper .rlb_comp-title-row {
        background: #F8FAFC;
        padding: 10px 15px;
        font-size: 13px;
        font-weight: 700;
        color: #334155;
        border-bottom: 1px solid var(--border-color);
        text-align: center;
    }

    #rlb_calculator_wrapper .rlb_comp-row {
        display: flex;
        justify-content: space-between;
        padding: 12px 15px;
        border-bottom: 1px solid #F1F5F9;
        font-size: 13px;
    }
    
    #rlb_calculator_wrapper .rlb_comp-row:last-child { border-bottom: none; }
    #rlb_calculator_wrapper .rlb_comp-label { color: #334155; font-weight: 700; }
    #rlb_calculator_wrapper .rlb_comp-val { font-weight: 600; color: var(--primary-color); }

    /* Savings Highlight */
    #rlb_calculator_wrapper .rlb_savings-row {
        background-color: var(--success-bg);
        border-top: 1px solid #BBF7D0;
    }
    #rlb_calculator_wrapper .rlb_savings-val { color: #166534; font-weight: 700; }
    
    /* Missing Class Fix */
    #rlb_calculator_wrapper .rlb_highlight-green {
        color: var(--success-color) !important;
        font-weight: 700 !important;
    }

    /* Chart */
    #rlb_calculator_wrapper .rlb_chart-box {
        background: white;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        padding: 15px;
        height: 300px;
        position: relative;
        margin-bottom: 20px;
    }
    
    /* Larger chart on desktop */
    @media (min-width: 901px) {
        #rlb_calculator_wrapper .rlb_chart-box {
            height: 400px;
        }
    }

    #rlb_calculator_wrapper .rlb_details-toggle {
        display: block;
        width: 100%;
        text-align: center;
        background: none;
        border: 1px dashed var(--border-color);
        color: var(--primary-color);
        padding: 10px;
        margin-top: 10px;
        border-radius: 6px;
    }
    #rlb_calculator_wrapper .rlb_details-toggle:hover { background-color: #F1F5F9; }

    #rlb_calculator_wrapper #rlb_amortizationSchedule { display: none; margin-top: 20px; max-height: 400px; overflow-y: auto; background: white; border: 1px solid var(--border-color); border-radius: 8px; }
    #rlb_calculator_wrapper .rlb_schedule-table { width: 100%; border-collapse: collapse; font-size: 12px; }
    #rlb_calculator_wrapper .rlb_schedule-table th { position: sticky; top: 0; background: #fff; padding: 10px; text-align: right; border-bottom: 2px solid #eee; z-index: 2; color: var(--primary-color); }
    #rlb_calculator_wrapper .rlb_schedule-table td { padding: 8px 10px; border-bottom: 1px solid #eee; text-align: right; color: #444; }
    #rlb_calculator_wrapper .rlb_schedule-table td:first-child, #rlb_calculator_wrapper .rlb_schedule-table th:first-child { text-align: left; }

    /* Disclaimer */
    #rlb_calculator_wrapper .rlb_disclaimer-text {
        font-size: 11px;
        color: #475569; /* Improved Contrast from #94A3B8 */
        text-align: center;
        margin-top: 15px;
        font-style: italic;
        line-height: 1.5;
        font-weight: 600; /* Added weight */
    }

    /* Mobile / Small Screen Adjustments */
    @media (max-width: 900px) {
      #rlb_calculator_wrapper .rlb_calculator-grid { grid-template-columns: 1fr; }
      #rlb_calculator_wrapper .rlb_input-section { 
          border-right: none; 
          border-bottom: 1px solid var(--border-color); 
          padding: 25px; 
          border-radius: 12px 12px 0 0; /* Rounded top corners only */
      }
      #rlb_calculator_wrapper .rlb_results-section { 
          padding: 25px; 
          border-radius: 0 0 12px 12px; /* Rounded bottom corners only */
      }
      #rlb_calculator_wrapper .rlb_calculator-container {
          border-radius: 12px; /* Keep container rounded */
          overflow: hidden; /* Clean edges on mobile */
      }
      #rlb_calculator_wrapper {
          padding: 20px 10px; /* Reduce body padding on mobile */
      }
    }