/* ==========================================================================
   Base Styles and Variables
   ========================================================================== */



/* Working nested list selector */
#actionPlan ul li ul {
    padding-left: 2rem !important;
    margin-left: 0 !important;
    text-indent: 0 !important;
}

/* Style for nested list items */
#actionPlan ul li ul li {
    margin-bottom: 0.25rem !important;
    font-size: 0.95em !important;
    color: var(--text-secondary, #666) !important;
}

:root {
    /* Color Variables */
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --error-color: #f44336;
    --success-color: #4CAF50;
    --warning-color: #ff9800;
    --highlight-color: #ff7f00;
    --text-primary: #121212;
    --text-secondary: #666;
    --background-primary: #ffffff;
    --background-secondary: #f5f5f5;
    --border-color: #ddd;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --scrollbar-track: #f1f1f1;
    --scrollbar-thumb: #888;
    --link-color: #ff7f00;
    --link-hover-color: #e67300;

    /* Spacing Variables */
    --spacing-xs: 0.125rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;

    /* Transitions */
    --transition-speed: 0.3s;

    /* New variables */
    --text-color: var(--text-primary);
    --text-muted: var(--text-secondary);
    --background-color: var(--background-primary);
}

/* Dark Theme Overrides */
[data-theme="dark"] {
    --text-primary: #ffffff;
    --text-secondary: #aaa;
    --background-primary: #121212;
    --background-secondary: #1e1e1e;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --scrollbar-track: #1a1a1a;
    --scrollbar-thumb: #333;
}

/* ==========================================================================
   Reset and Base Styles
   ========================================================================== */

/* Validation Error Styles */
.validation-error {
    color: var(--error-color, #f44336);
    font-size: 0.9em;
    margin-top: 5px;
    padding: 5px 0;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-speed);
}

.validation-error.show {
    display: block;
}

.validation-error.hide {
    display: none;
}

/* Input error state */
input.large-input.error {
    border-color: var(--error-color, #f44336);
    box-shadow: 0 0 0 2px rgba(244, 67, 54, 0.2);
}

/* Input focus state for error inputs */
input.large-input.error:focus {
    border-color: var(--error-color, #f44336);
    box-shadow: 0 0 0 2px rgba(244, 67, 54, 0.3);
}

/* Disabled input styles */
input.large-input:disabled {
    background-color: var(--background-secondary, #f5f5f5);
    color: var(--text-secondary, #666);
    cursor: not-allowed;
    opacity: 0.6;
}

/* Disabled input placeholder */
input.large-input:disabled::placeholder {
    color: var(--text-secondary, #666);
    opacity: 0.8;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    min-height: 100vh;
}

/* ==========================================================================
   Layout
   ========================================================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

/* ==========================================================================
   Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.2rem; }

p {
    margin-bottom: var(--spacing-md);
}



/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--background-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-speed);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--highlight-color);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

button {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.primary-button {
    background-color: var(--highlight-color);
    color: white;
}

.primary-button:hover {
    background-color: var(--link-hover-color);
}

.secondary-button {
    background: transparent;
    border: 1px solid #ff7f00;
    color: #ff7f00;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
}

.secondary-button:hover {
    background: rgba(255, 127, 0, 0.1);
}

/* ==========================================================================
   Content Sections
   ========================================================================== */

.step-content {
    padding: var(--spacing-xl);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-xl);
    transition: opacity var(--transition-speed), visibility var(--transition-speed);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    position: relative; /* Ensure proper positioning */
}

.step-content.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    position: relative; /* Ensure proper positioning */
}

.step-content.completed {
    opacity: 0.8;
    visibility: visible;
    pointer-events: auto;
    position: relative; /* Ensure proper positioning */
}

.content-box {
    background-color: var(--background-primary);
    border: 1px solid rgba(255, 127, 0, 0.2);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-xl);
    margin: var(--spacing-md) 0;
    box-shadow: 0 2px 10px var(--shadow-color);
}

/* ==========================================================================
   Project Management
   ========================================================================== */

.project-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.project-option {
    padding: var(--spacing-xl);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    transition: transform var(--transition-speed);
}

.project-option:hover {
    transform: translateY(-2px);
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.hidden { display: none !important; }
.text-center { text-align: center; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ==========================================================================
   Scrollbar
   ========================================================================== */

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: var(--border-radius-sm);
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
        padding-top: 160px; /* Reserve space for navigation controls and step titles */
        margin-left: 0 !important; /* Reset desktop margin */
        width: 100% !important; /* Use full width on mobile */
        max-width: 100% !important; /* Prevent overflow */
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.2rem; }
    h4 { font-size: 1.1rem; }



    .project-options {
        grid-template-columns: 1fr;
    }

    .step-content {
        padding: var(--spacing-md);
        margin-top: 0; /* No additional spacing needed */
    }

    .content-box {
        padding: var(--spacing-lg);
    }

    /* Ensure main content area has proper spacing */
    main {
        margin-top: 0; /* No additional spacing needed */
        width: 100% !important; /* Use full width on mobile */
        max-width: 100% !important; /* Prevent overflow */
        position: relative; /* Ensure proper positioning context */
    }
}

/* ==========================================================================
   Animations
   ========================================================================== */

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

@keyframes shake {
    10%, 90% { transform: translate3d(-1px, 0, 0); }
    20%, 80% { transform: translate3d(2px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-3px, 0, 0); }
    40%, 60% { transform: translate3d(3px, 0, 0); }
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ==========================================================================
   Theme Toggle Button
   ========================================================================== */

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    background: transparent;
    border: 2px solid #ff7f00;
    color: #ff7f00;
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 1000;
}



/* ==========================================================================
   Mobile Navigation Styles
   ========================================================================== */

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md);
        padding-top: 80px; /* Space for theme toggle and reset button */
        margin-left: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
    }

    /* Position controls at the top */
    .theme-toggle {
        top: 15px;
        right: 15px;
        z-index: 1001;
    }

    .reset-button {
        position: fixed;
        top: 15px;
        right: 70px; /* Position to the left of theme toggle */
        z-index: 1001;
        background: transparent;
        border: 2px solid #ff7f00;
        color: #ff7f00;
        padding: 8px 12px;
        border-radius: 4px;
        cursor: pointer;
        font-size: 0.8rem;
        white-space: nowrap;
    }



    /* Stack project options vertically on mobile */
    .project-options {
        flex-direction: column;
        gap: 1rem;
    }

    .project-option {
        flex: none;
        width: 100%;
    }

    /* Stack project actions vertically on mobile */
    .project-actions {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }

    /* Stack current project content vertically on mobile */
    .current-project-content {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .project-info {
        flex: none;
    }
}

/* ==========================================================================
   Desktop Styles
   ========================================================================== */

@media (min-width: 769px) {
    .container {
        margin-left: 0;
        width: 100%;
    }

    .theme-toggle {
        left: 20px;
        top: 20px;
        right: auto;
    }

    .reset-button {
        left: 80px;
        top: 20px;
        right: auto;
    }


}

/* ==========================================================================
   Project Form Styles
   ========================================================================== */

.project-form {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 127, 0, 0.2);
}

.project-options {
    display: flex;
    gap: 2rem;
    margin-top: 1.5rem;
}

.project-option {
    flex: 1;
    padding: 1.5rem;
    background-color: var(--background-color);
    border: 1px solid rgba(255, 127, 0, 0.2);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.project-option h4 {
    color: #ff7f00;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.project-option p {
    margin-bottom: 1rem;
    opacity: 0.9;
}

.project-option .form-group {
    margin-top: 1rem;
}

/* ==========================================================================
   Update import section styles
   ========================================================================== */

.import-section {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 2px dashed rgba(255, 127, 0, 0.3);
    border-radius: 8px;
    text-align: center;
}

.import-section input[type="file"] {
    display: block;
    width: 100%;
    margin: 1rem 0;
    padding: 1rem;
    border: 1px solid rgba(255, 127, 0, 0.3);
    border-radius: 4px;
    background: var(--background-color);
    color: var(--text-color);
}

.import-section .form-help {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ==========================================================================
   Current Project Display
   ========================================================================== */

.current-project {
    background: var(--background-color);
    padding: 1.5rem;
    border-radius: 8px;
    border: 2px solid #ff7f00;
    position: relative;
}

.current-project-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.project-info {
    flex: 1;
}

.current-project h4 {
    color: #ff7f00;
    margin-bottom: 0.5rem;
}

.current-project .project-name {
    font-size: 1.2rem;
    font-weight: 500;
    margin: 0;
}

.project-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

/* ==========================================================================
   Error Message
   ========================================================================== */

.error-message {
    background: rgba(244, 67, 54, 0.1);
    color: #f44336;
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
    animation: fadeIn 0.3s ease-in;
}

.error-message.shake {
    animation: shake 0.5s cubic-bezier(.36,.07,.19,.97) both;
}

.error-message.fade-out {
    animation: fadeOut 0.3s ease-out forwards;
}

/* ==========================================================================
   Delete Success Message
   ========================================================================== */

.delete-success-message {
    background: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

/* ==========================================================================
   Load Success Message
   ========================================================================== */

.load-success-message {
    background: rgba(76, 175, 80, 0.1);
    color: #4CAF50;
    padding: 1rem;
    border-radius: 4px;
    margin-top: 1rem;
    animation: fadeIn 0.3s ease-out;
}

.substep {
    list-style-type: none;  /* Removes bullet points */
    margin: 0.25rem 0;      /* Reduces vertical spacing between items */
    padding-left: 1.5rem;   /* Maintains indentation but removes default padding */
}

/* ==========================================================================
   Navigation Status Styles
   ========================================================================== */



/* ==========================================================================
   Improve visibility in dark mode
   ========================================================================== */



/* ==========================================================================
   Next Button Styles
   ========================================================================== */

.next-button {
    background-color: #ff7f00;
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 4px;
    margin-top: 1.5rem;
    cursor: pointer;
    opacity: 0.5;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.next-button.active {
    opacity: 1;
    pointer-events: auto;
}

.next-button:hover {
    background-color: #e67300;
}

/* ==========================================================================
   Checklist Styles
   ========================================================================== */

.checklist-form {
    margin: 2rem 0;
}

.checkbox-group h4 {
    color: var(--text-color);
    margin: 1.5rem 0 0.75rem 0;
    font-size: 1.1rem;
}

.checkbox-group h4:first-child {
    margin-top: 0;
}

.checkbox-subgroup {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-left: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.checkbox-label:hover {
    background-color: rgba(255, 127, 0, 0.1);
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.3rem;
    cursor: pointer;
}

.checkbox-label span {
    line-height: 1.4;
}

/* ==========================================================================
   Nested List Styles
   ========================================================================== */

/* Style for nested lists in step 7 and other content areas */
.content-box ul li ul {
    margin-top: 0.5rem !important;
    margin-bottom: 0.5rem !important;
    padding-left: 2rem !important;
    margin-left: 0 !important;
}

.content-box ul li ul li {
    margin-bottom: 0.25rem !important;
    font-size: 0.95em !important;
    color: var(--text-secondary, #666) !important;
}

/* Additional indentation for deeper nesting if needed */
.content-box ul li ul ul {
    padding-left: 2.5rem !important;
}

.content-box ul li ul ul li {
    font-size: 0.9em !important;
    color: var(--text-muted, #888) !important;
}

/* Force indentation with more specific selectors */
/* Clean, single rule for nested list indentation */
#actionPlan .content-box ul li ul {
    padding-left: 2rem !important;
    margin-left: 0 !important;
    text-indent: 0 !important;
}

/* Style for nested list items */
#actionPlan .content-box ul li ul li {
    margin-bottom: 0.25rem !important;
    font-size: 0.95em !important;
    color: var(--text-secondary, #666) !important;
}

/* ==========================================================================
   Tooltip Styles
   ========================================================================== */

.tooltip-container {
    position: relative;
}

.tooltip {
    visibility: hidden;
    position: absolute;
    left: 100%;  /* Position to the right of the icon */
    top: 50%;
    transform: translateY(-50%);
    background-color: var(--text-color);
    color: var(--background-color);
    padding: 0.75rem;
    border-radius: 4px;
    width: 400px;
    max-width: 400px;
    min-height: auto;
    margin-left: 10px;
    font-size: 0.9rem;
    line-height: 1.4;
    z-index: 100;
    opacity: 0;
    transition: opacity 0.3s;
    white-space: normal;
    word-wrap: break-word;
}

/* Arrow for tooltip */
.tooltip::before {
    content: "";
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    border-width: 5px;
    border-style: solid;
    border-color: transparent var(--text-color) transparent transparent;
}

.tooltip-container:hover .tooltip {
    visibility: visible;
    opacity: 1;
}

/* ==========================================================================
   Responsive tooltip positioning for mobile
   ========================================================================== */

@media (max-width: 768px) {
    .tooltip {
        left: 50%;
        top: 100%;
        transform: translateX(-50%);
        margin-left: 0;
        margin-top: 10px;
    }

    .tooltip::before {
        left: 50%;
        top: -10px;
        transform: translateX(-50%);
        border-color: transparent transparent var(--text-color) transparent;
    }
}

/* ==========================================================================
   Link styles
   ========================================================================== */

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--link-hover-color);
    text-decoration: underline;
}

/* Add styles for the save button */
.save-button {
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    margin-left: 1rem;
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.save-button.active {
    opacity: 1;
    cursor: pointer;
}

.save-button:not(.active) {
    cursor: not-allowed;
}

/* Update the button container to handle multiple buttons */
.step-content .button-container {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    justify-content: flex-start;
}

/* Add celebration message styles */
.celebration-message {
    background: linear-gradient(135deg, #ff7f00, #ff4d00);
    color: white;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
    text-align: center;
    animation: slideIn 0.5s ease-out;
}

.celebration-message h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.celebration-message p {
    font-size: 1.2rem;
    margin: 0.5rem 0;
    opacity: 0.9;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ==========================================================================
   Version Info
   ========================================================================== */

.version-info {
    position: fixed;
    bottom: 10px;
    right: 10px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 5px 10px;
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-sm);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.version-info:hover {
    opacity: 1;
}

.large-input {
    width: 200px;
    height: 40px;
    font-size: 1.2em;
    padding: 8px;
}

/* Quantity field styles */
.quantity-field {
    display: none;
    margin-top: var(--spacing-sm);
    margin-left: 2rem;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    animation: slideIn 0.3s ease-out;
}

.quantity-field.show {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.quantity-field label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    white-space: nowrap;
}

.quantity-field input[type="number"] {
    width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--background-primary);
    color: var(--text-primary);
    text-align: center;
}

.quantity-field input[type="number"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.1);
}

.quantity-field input[type="number"]::-webkit-inner-spin-button,
.quantity-field input[type="number"]::-webkit-outer-spin-button {
    opacity: 1;
}

/* BTU input specific styles for better UX */
.quantity-field input[name="heating_quantity"] {
    width: 120px;
    text-align: right;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    padding: 8px 12px;
}

.quantity-field input[name="heating_quantity"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* Custom step increment styling */
.quantity-field input[name="heating_quantity"]::-webkit-inner-spin-button {
    background: var(--background-secondary);
    border-left: 1px solid var(--border-color);
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
}

.quantity-field input[name="heating_quantity"]::-webkit-outer-spin-button {
    background: var(--background-secondary);
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
}



/* Heating input group layout */
.heating-input-group {
    width: 100%;
}

.heating-input-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.input-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.unit-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Multiple heating systems styling */
.heating-systems-container {
    width: 100%;
}

.heating-system-item {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    position: relative;
}

.heating-system-item:not(:first-child) {
    border-left: 4px solid var(--primary-color);
}

.heating-system-item .remove-heating-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--warning-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
}

.heating-system-item .remove-heating-btn:hover {
    background: #ff7f00;
}

.add-heating-system {
    margin-top: var(--spacing-md);
    text-align: center;
}

.add-heating-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: background-color var(--transition-speed);
}

.add-heating-btn:hover {
    background: #388e3c;
}

.add-heating-btn:disabled {
    background: var(--text-secondary);
    cursor: not-allowed;
}

.plus-icon {
    font-size: 1.2rem;
    font-weight: bold;
}

/* Heating capacity input styling */
.heating-capacity-input {
    width: 120px !important;
    min-width: 120px;
}

/* Mobile responsive styles for BTU input */
@media (max-width: 768px) {
    .quantity-field {
        margin-left: 1rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .quantity-field input[name="heating_quantity"] {
        width: 80px;
        font-size: 0.9rem;
        padding: 6px 8px;
    }
    
    .heating-capacity-input {
        width: 100px !important;
        min-width: 100px;
    }

    
    .input-row {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .unit-label {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .quantity-field {
        margin-left: 0.5rem;
        padding: var(--spacing-xs);
    }
    
    .quantity-field input[name="heating_quantity"] {
        width: 70px;
        font-size: 0.85rem;
        padding: 5px 6px;
    }
    
    .heating-input-group label {
        font-size: 0.9rem;
    }
    
    .description {
        font-size: 0.85rem;
    }
}

/* ==========================================================================
   Appliances Summary Table
   ========================================================================== */

.appliances-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--spacing-sm);
    background-color: var(--background-primary);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 2px 4px var(--shadow-color);
}

.appliances-table th {
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.appliances-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}

.appliances-table tr:last-child td {
    border-bottom: none;
}

.appliances-table tr:hover {
    background-color: var(--background-secondary);
}

.appliances-table tbody tr:nth-child(even) {
    background-color: var(--background-secondary);
}

.appliances-table tbody tr:nth-child(even):hover {
    background-color: var(--border-color);
}

/* Product Selector Dropdown Styles */
.product-selector {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--background-primary);
    color: var(--text-color);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.product-selector:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.1);
}

.product-selector:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

.product-selector option {
    padding: var(--spacing-sm);
    background-color: var(--background-primary);
    color: var(--text-color);
}

/* Dark theme overrides for dropdowns */
[data-theme="dark"] .product-selector {
    background-color: var(--background-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .product-selector option {
    background-color: var(--background-secondary);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .appliances-table {
        font-size: 0.9rem;
    }
    
    .appliances-table th,
    .appliances-table td {
        padding: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .appliances-table {
        font-size: 0.85rem;
    }
    
    .appliances-table th,
    .appliances-table td {
        padding: var(--spacing-xs);
    }
    
    .appliances-table th:first-child {
        width: 40%;
    }
    
    .appliances-table th:last-child {
        width: 60%;
    }
}

/* ==========================================================================
   Product Recommendations and Selection Interface
   ========================================================================== */

.recommendation-category {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.recommendation-category h4 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--primary-color);
    font-size: 1.1rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.product-card {
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-md);
    transition: all 0.2s ease;
    position: relative;
}

.product-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 8px var(--shadow-color);
    transform: translateY(-2px);
}

.product-card h5 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.product-card p {
    margin: var(--spacing-xs) 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.product-card p strong {
    color: var(--text-primary);
}

.select-product-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background-color 0.2s ease;
    margin-top: var(--spacing-sm);
    width: 100%;
}

.select-product-btn:hover {
    background-color: var(--primary-hover);
}

.select-product-btn.selected {
    background-color: var(--success-color);
}

.selected-products-summary {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.selected-products-summary h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--primary-color);
}

.selected-product-item {
    background-color: var(--background-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
    margin: var(--spacing-sm) 0;
    position: relative;
}

.selected-product-item h5 {
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text-primary);
    font-size: 1rem;
}

.selected-product-item p {
    margin: var(--spacing-xs) 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.selected-product-item p strong {
    color: var(--text-primary);
}

.deselect-product-btn {
    background-color: var(--error-color);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.8rem;
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
}

.deselect-product-btn:hover {
    background-color: var(--error-hover);
}

.capacity-summary {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--background-primary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.capacity-summary p {
    margin: var(--spacing-sm) 0;
    font-size: 1rem;
    font-weight: 500;
}

.capacity-summary p strong {
    color: var(--text-primary);
}

/* CSV Appliances Table Styles */
.csv-appliances-table {
    margin: var(--spacing-lg) 0;
    padding: var(--spacing-md);
    background-color: var(--background-secondary);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
}

.csv-appliances-table h3 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--primary-color);
}

.csv-appliances-table .appliances-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
}

.csv-appliances-table .appliances-table th,
.csv-appliances-table .appliances-table td {
    padding: var(--spacing-sm);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.csv-appliances-table .appliances-table th {
    background-color: var(--background-primary);
    font-weight: 600;
    color: var(--text-primary);
}

.csv-appliances-table .appliances-table td {
    background-color: var(--background-primary);
    color: var(--text-secondary);
}

.csv-appliances-table .appliances-table tr:hover td {
    background-color: var(--background-secondary);
}

.csv-summary {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--background-primary);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.csv-summary h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--primary-color);
}

.csv-summary p {
    margin: var(--spacing-sm) 0;
    font-size: 1rem;
    font-weight: 500;
}

.csv-summary p strong {
    color: var(--text-primary);
}

/* ==========================================================================
   Calculation Results Display Styles
   ========================================================================== */

.calculation-results {
    margin-top: 0;
    padding-top: 0;
    border-top: none;
}

.calculation-results h5 {
    margin: 0 0 1rem 0;
    color: var(--text-color);
    font-size: 1.1rem;
}

.calculation-methods {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.calculation-method {
    flex: 1;
    min-width: 300px;
    padding: 1rem;
    background-color: var(--background-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* When only one method is visible, make it take full width */
.calculation-methods:has(.calculation-method:only-child) .calculation-method {
    flex: 0 0 100%;
    max-width: 100%;
}

.calculation-method h6 {
    margin: 0 0 0.75rem 0;
    color: var(--text-color);
    font-size: 1rem;
    font-weight: 600;
}

.calculation-method p {
    margin: 0;
    color: var(--text-color);
}

.calculation-method p strong {
    color: var(--text-primary);
}

/* Responsive design for smaller screens */
@media (max-width: 768px) {
    .calculation-methods {
        flex-direction: column;
        gap: 1rem;
    }
    
    .calculation-method {
        min-width: auto;
    }
}

/* Mobile responsiveness for product grid */
@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .product-card {
        padding: var(--spacing-sm);
    }
    
    .recommendation-category {
        padding: var(--spacing-sm);
    }
    
    .csv-appliances-table .appliances-table {
        font-size: 0.9rem;
    }
    
    .csv-appliances-table .appliances-table th,
    .csv-appliances-table .appliances-table td {
        padding: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .product-card h5 {
        font-size: 0.95rem;
    }
    
    .product-card p {
        font-size: 0.85rem;
    }
    
    .select-product-btn {
        font-size: 0.85rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* ==========================================================================
   Details Button and Popup Styles
   ========================================================================== */

.details-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    transition: background-color var(--transition-speed);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.details-btn:hover {
    background: var(--link-hover-color);
}

.details-btn:active {
    transform: translateY(1px);
}

/* Product Details Popup */
.product-details-popup {
    font-family: inherit;
}

.popup-content {
    font-family: inherit;
}

.popup-content h3,
.popup-content h4 {
    font-family: inherit;
    font-weight: 600;
}

.popup-content strong {
    font-weight: 600;
}

/* Mobile responsiveness for popup */
@media (max-width: 768px) {
    .popup-content {
        padding: 16px;
        max-width: 95vw;
        max-height: 95vh;
    }
    
    .details-btn {
        padding: 6px 8px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .popup-content {
        padding: 12px;
        max-width: 98vw;
        max-height: 98vh;
    }
    
    .details-btn {
        padding: 4px 6px;
        font-size: 0.75rem;
    }
}