:root {
    --primary-green: #2E7D32;
    --light-green: #C8E6C9;
    --dark-green: #1B5E20;
    --background-color: #F1F8E9;
    --text-color: #212121;
    --border-color: #BDBDBD;
    --white: #FFFFFF;
    --danger-color: #D32F2F;
    --danger-light: #FFCDD2;
    --fraction-16: #795548;
    /* Brown */
    --fraction-8: #FF5722;
    /* Deep Orange */
    --fraction-4: #03A9F4;
    /* Light Blue */
    --fraction-2: #E91E63;
    /* Pink */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #619920;
    color: var(--text-color);
    line-height: 1.6;
    padding: 1rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1rem;
    background-color: var(--white);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

header {
    text-align: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

header h1 {
    color: var(--primary-green);
    font-size: 2rem;
}

.section {
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    color: var(--dark-green);
    border-bottom: 2px solid var(--light-green);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
}

.formula-toggle-container {
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary-green);
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: bold;
    padding: 0.25rem;
    text-decoration: none;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.whole-number-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.input-group input[type="number"] {
    flex-grow: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1.2rem;
    text-align: center;
}

/* Hide spinner buttons on number inputs */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type=number] {
    -moz-appearance: textfield;
}

.fraction-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    flex: 1;
}

.fraction-btn {
    padding: 0.5rem 0.25rem;
    background-color: var(--white);
    color: var(--primary-green);
    border: 1px solid var(--light-green);
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    line-height: 1.2;
}

.fraction-btn .fraction-text {
    font-size: 1rem;
    font-weight: bold;
}

.fraction-btn .decimal-text {
    font-size: 0.75rem;
    color: #666;
}

.fraction-btn.fraction-den-2 {
    border-color: var(--fraction-2);
    color: var(--fraction-2);
}

.fraction-btn.fraction-den-4 {
    border-color: var(--fraction-4);
    color: var(--fraction-4);
}

.fraction-btn.fraction-den-8 {
    border-color: var(--fraction-8);
    color: var(--fraction-8);
}

.fraction-btn.fraction-den-16 {
    border-color: var(--fraction-16);
    color: var(--fraction-16);
}

.fraction-btn.selected.fraction-den-2 {
    background-color: var(--fraction-2);
    border-color: var(--fraction-2);
}

.fraction-btn.selected.fraction-den-4 {
    background-color: var(--fraction-4);
    border-color: var(--fraction-4);
}

.fraction-btn.selected.fraction-den-8 {
    background-color: var(--fraction-8);
    border-color: var(--fraction-8);
}

.fraction-btn.selected.fraction-den-16 {
    background-color: var(--fraction-16);
    border-color: var(--fraction-16);
}

.fraction-btn.selected .decimal-text {
    color: var(--light-green);
}

/* Apply hover effect only on devices that can truly hover (like desktops with a mouse) */
@media (hover: hover) and (pointer: fine) {
    .fraction-btn:hover {
        background-color: var(--light-green);
    }
}

.fraction-btn.selected {
    background-color: var(--primary-green);
    color: var(--white);
    border-color: var(--dark-green);
}

.toggle-switch {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.label-with-help {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    /* For positioning the popup */
}

.help-btn {
    background-color: var(--border-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    font-size: 0.9rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.help-popup {
    position: absolute;
    top: 125%;
    left: 0;
    width: 280px;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    z-index: 10;
}

.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--light-green);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked+.slider {
    background-color: var(--primary-green);
}

input:checked+.slider:before {
    transform: translateX(26px);
}

.results-card {
    background-color: var(--light-green);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 5px solid var(--primary-green);
}

.formula-display-card {
    margin-bottom: 1rem;
    font-family: 'Courier New', Courier, monospace;
    color: #757575;
    /* Greyed out */
    font-weight: 600;
    /* Slightly bold */
    font-size: 0.9rem;
    line-height: 1.4;
    text-align: center;
    white-space: nowrap;
    /* Ensures each formula stays on one line */
}

.calculation-breakdown {
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.85rem;
    color: #616161;
    margin-top: 0.5rem;
    line-height: 1.5;
    text-align: left;
    white-space: normal;
}

.results-card.unsupported {
    background-color: var(--danger-light);
    border-left-color: var(--danger-color);
}

#unsupported-formula-warning {
    padding: 1rem;
    border: 2px solid var(--danger-color);
    border-radius: 4px;
}

#unsupported-formula-warning p {
    color: var(--danger-color);
    margin: 0;
    font-weight: bold;
    text-align: center;
}

.result-item {
    font-size: 1.2rem;
}

.result-item strong {
    color: var(--dark-green);
}

.result-item .decimal {
    font-size: 0.9rem;
    color: #555;
    margin-left: 0.5rem;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
    font-weight: bold;
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
}

.btn-primary:hover {
    background-color: var(--dark-green);
}

.btn-secondary {
    background-color: #757575;
    color: var(--white);
}

.btn-secondary:hover {
    background-color: #616161;
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--white);
}

.btn-danger:hover {
    background-color: #B71C1C;
}

.btn:disabled,
.btn[disabled] {
    background-color: var(--border-color);
    color: #757575;
    cursor: not-allowed;
    opacity: 0.8;
    /* Prevent hover effects on disabled buttons */
    pointer-events: none;
}

#cabinet-list {
    list-style-type: none;
}

.list-item {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    gap: 1rem;
    transition: opacity 0.3s, background-color 0.3s;
    position: relative;
}

.list-item.completed {
    opacity: 0.65;
    background-color: #f5f5f5;
}

.list-item.completed .list-item-main {
    text-decoration: line-through;
    text-decoration-thickness: 2px;
}

.list-item-main {
    display: flex;
    flex-direction: column;
}

.list-item-metadata {
    font-size: 0.8rem;
    color: #757575;
    margin-bottom: 0.75rem;
}

.list-item-metadata .item-number {
    font-weight: bold;
    color: var(--dark-green);
    margin-right: 0.5rem;
}

.list-item-dimensions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.dimension-block {
    text-align: center;
}

.dimension-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: #616161;
    display: block;
}

.dimension-value {
    font-size: 1.1rem;
    font-weight: 500;
}

.dimension-decimal {
    display: block;
    font-size: 0.8rem;
    color: #757575;
}

.dimension-block.result .dimension-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-green);
}

.dimension-arrow {
    font-size: 1.5rem;
    color: var(--border-color);
}

.list-item-details-toggle {
    grid-column: 1 / -1;
    /* Span across all columns */
    text-align: center;
    margin-top: 0.5rem;
}

.list-item-details {
    grid-column: 1 / -1;
    /* Span across all columns */
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px dashed var(--border-color);
    font-size: 0.9rem;
    background-color: #fafafa;
    padding: 0.75rem;
}

.list-item-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
}

.list-item-actions .btn-remove-item {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.list-item-actions .btn-remove-item svg {
    width: 20px;
    height: 20px;
    fill: var(--danger-color);
    transition: fill 0.2s;
}

.list-item-complete-toggle input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

/* --- Responsive Design for Mobile --- */
@media (max-width: 600px) {
    .list-item-dimensions {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .dimension-arrow {
        transform: rotate(90deg);
        margin: 0.5rem 0;
    }
}

@media (max-width: 480px) {

    /* For the "Real-time Calculation" toggle, spread it out on small screens */
    main>.section>.toggle-switch {
        justify-content: space-between;
    }
}

.hidden {
    display: none;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1001;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    padding-top: 60px;
}

.modal-content {
    background-color: var(--background-color);
    margin: 5% auto;
    width: 80%;
    max-width: 500px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: animatetop 0.4s;
    border-top: 5px solid var(--primary-green);
}

@keyframes animatetop {
    from {
        top: -300px;
        opacity: 0
    }

    to {
        top: 0;
        opacity: 1
    }
}

.modal-header {
    padding: 1rem 1.5rem;
    background-color: var(--white);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    color: var(--dark-green);
}

.modal-body {
    padding: 1.5rem;
    background-color: var(--white);
}

.modal-body p {
    margin-bottom: 1.5rem;
    font-style: italic;
    color: #555;
}

.modal-body textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: 'Courier New', Courier, monospace;
    min-height: 80px;
}

.modal-body fieldset {
    border: 1px solid var(--border-color);
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.modal-footer {
    padding: 0.5rem;
    background-color: #f9f9f9;
    border-top: 1px solid var(--border-color);
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    display: flex;
    justify-content: space-evenly;
}

.radio-group {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.formula-input-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group.formula-disabled label,
.form-group.formula-disabled textarea {
    opacity: 0.5;
    cursor: not-allowed;
}

.list-item-details .tape-measure-container {
    height: 70px;
}

.tape-measure-container {
    position: relative;
    width: 100%;
    height: 60px;
    overflow: hidden;
    border: 1px solid #ccc;
    background-color: #e8dd20;
}

.tape-measure {
    display: flex;
    height: 100%;
}

.inch {
    display: flex;
    align-items: flex-end;
    flex-shrink: 0;
    width: 96px;
    position: relative;
    justify-content: space-between;
}

.inch-label {
    position: absolute;
    top: 0;
    left: 5px;
    font-size: 12px;
    font-weight: bold;
}

.tick {
    width: 2px;
    margin: 0 2px;
    background-color: #333;
}

.sixteenth {
    height: 10px;
}

.eighth {
    height: 15px;
}

.quarter {
    height: 20px;
}

.half {
    height: 25px;
}

.whole-tick {
    height: 30px;
    background-color: #000;
}

.indicator {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: translateX(100%);
}

.indicator-triangle {
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid red;
}

.indicator-line {
    width: 2px;
    height: 100%;
    background-color: red;
    opacity: 60%;
}