/* Basic Reset & Defaults */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Primary Color Palette */
    --primary-dark: #1e3a8a;    /* Dark blue */
    --primary: #2563eb;         /* Main blue */
    --primary-light: #dbeafe;   /* Light blue */
    --accent: #059669;          /* Green for prices */
    --accent-light: #d1fae5;    /* Light green for hover */
    --neutral-dark: #1f2937;    /* Dark gray for text */
    --neutral: #6b7280;         /* Medium gray */
    --neutral-light: #f3f4f6;   /* Light gray for backgrounds */
    --white: #ffffff;
    --danger: #dc2626;          /* Red for errors/alerts */
    --warning: #f59e0b;         /* Amber for warnings */

    /* Typography */
    --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height: 1.6;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--neutral-dark);
    background-color: var(--neutral-light);
    padding: var(--spacing-md);
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
}

header h1 {
    margin-bottom: var(--spacing-sm);
    font-size: 2.2rem;
    letter-spacing: 0.5px;
}

header p {
    opacity: 0.9;
    font-size: 1rem;
    letter-spacing: 1px;
}

/* Configurator Layout */
.configurator-container {
    display: flex;
    flex-wrap: wrap; 
    gap: var(--spacing-xl);
    max-width: 1400px;
    margin: 0 auto;
}

.configurator-main {
    flex: 3; 
    min-width: 300px; 
}

.configurator-summary {
    flex: 1; 
    min-width: 300px;
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-md);
    border: 1px solid rgba(0,0,0,0.08);
    box-shadow: var(--shadow-sm);
    align-self: self-start; 
    max-height: calc(100vh - 2 * var(--spacing-md)); 
    overflow-y: auto; 
}

/* Categories and Items */
.category {
    background-color: var(--white);
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease;
}

.category:hover {
    box-shadow: var(--shadow-md);
}

.category h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--primary);
    padding-bottom: var(--spacing-sm);
    font-weight: 600;
}

.item {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px dashed rgba(0,0,0,0.1);
}

.item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.item h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--neutral-dark);
    font-weight: 600;
}

.item .description {
    font-size: 0.92em;
    color: var(--neutral);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--primary-light);
    white-space: pre-wrap; 
}

/* Options Styling */
.options {
    margin-top: var(--spacing-md);
}

.option {
    display: flex; 
    align-items: center; 
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: background-color 0.2s ease;
}

.option:hover {
    background-color: var(--primary-light);
}

.option input[type="checkbox"],
.option input[type="radio"] {
    margin-right: var(--spacing-md);
    transform: scale(1.15); 
    cursor: pointer;
    accent-color: var(--primary);
}

.option > label:not([for$="-qty"]) { /* Label for radio/checkbox options specifically, not for quantity inputs */
     flex-grow: 1;
     cursor: pointer;
     margin-right: var(--spacing-md);
}

.option .option-label-text { 
    flex-grow: 1;
    margin-right: var(--spacing-md);
}

.option .price,
.option .price-unit,
.option .notes {
    font-weight: bold;
    color: var(--accent);
    margin-left: auto; 
    white-space: nowrap; 
}
.option .unit-price { /* For prices like (€X.XX/Stk.) */
    font-weight: normal;
    color: var(--neutral);
    min-width: 120px;
    text-align: right;
}


.option .notes {
    font-weight: normal;
    font-size: 0.85em;
    color: var(--neutral);
    margin-left: var(--spacing-md);
    word-wrap: break-word; 
    white-space: normal; 
}

/* Visual Tags for Accessory/Consumable/Add-on using ::after on the label text span */
.option.accessory .option-label-text::after,
.option.consumable .option-label-text::after,
.option.add-on .option-label-text::after {
    display: inline-block;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75em;
    margin-left: 8px;
    font-weight: 500;
}

.option.accessory .option-label-text::after {
    content: 'Phụ kiện';
    background-color: var(--primary-light);
    color: var(--primary-dark);
}

.option.consumable .option-label-text::after {
    content: 'Vật tư'; 
    background-color: #fff3cd; 
    color: #856404; 
}
.option.add-on .option-label-text::after {
    content: 'Add-on';
    background-color: #e0e7ff; /* Light Indigo */
    color: #3730a3; /* Dark Indigo */
}


.option.no-price .notes {
    color: var(--neutral);
    font-style: italic;
}

/* Quantity Input specific styling (for non-stepper inputs) */
.quantity-input:not(.stepper-value) {
    width: 60px;
    text-align: right;
    padding: 5px;
    margin-left: auto; /* Default to push it right */
    border: 1px solid #bdc3c7;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
    font-size: 0.95rem;
}
.quantity-label { /* For "Stk." or "mét" on non-stepper inputs */
    margin-left: var(--spacing-xs);
    margin-right: var(--spacing-md);
    color: var(--neutral);
    white-space: nowrap;
}

/* Style for specific number inputs (Item 12 and Item 6g - if not covered by .quantity-input) */
#item-12-input {
    padding: 10px 12px;
    font-size: 1rem;
    border: 1px solid #bdc3c7;
    border-radius: var(--border-radius-sm);
    width: 90px;
    text-align: right;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    margin: 0 var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

#item-6g-quantity { /* Ethernet cable quantity */
    padding: 8px 10px;
    font-size: 0.95rem;
    border: 1px solid #bdc3c7;
    border-radius: var(--border-radius-sm);
    text-align: right;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.quantity-input:not(.stepper-value):focus,
#item-12-input:focus,
#item-6g-quantity:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25), var(--shadow-md);
}

.quantity-input:not(.stepper-value):disabled,
#item-6g-quantity:disabled {
    background-color: #f1f5f9;
    cursor: not-allowed;
    opacity: 0.7;
}

/* Stepper Input Styles */
.quantity-stepper-wrapper {
    display: flex;
    align-items: center;
    margin-left: auto; /* Pushes it towards the right, before the unit price */
}

.quantity-stepper {
    display: flex;
    align-items: center;
    border: 1px solid #bdc3c7; /* Adjusted border color */
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.quantity-btn {
    background-color: var(--neutral-light);
    border: none;
    color: var(--neutral-dark);
    padding: 6px 10px; /* Fine-tuned padding for balance */
    cursor: pointer;
    font-size: 1.1rem; /* Slightly reduced for compactness */
    line-height: 1;
    font-weight: bold;
    transition: background-color 0.2s;
    height: 36px; /* Explicit height for alignment */
    display: flex;
    align-items: center;
    justify-content: center;
}

.quantity-btn:hover {
    background-color: #e9ecef; 
}
.quantity-btn:active {
    background-color: #dee2e6;
}

.quantity-btn.minus-btn {
    border-right: 1px solid #bdc3c7; /* Match stepper border */
}

.quantity-btn.plus-btn {
    border-left: 1px solid #bdc3c7; /* Match stepper border */
}

.stepper-value { /* This is also .quantity-input */
    width: 45px; 
    text-align: center;
    border: none;
    font-size: 0.95rem;
    padding: 6px 0; 
    height: 36px; /* Match button height */
    color: var(--neutral-dark);
    background-color: var(--white);
    -moz-appearance: textfield; /* Firefox - hide spinners */
}

.stepper-value::-webkit-outer-spin-button,
.stepper-value::-webkit-inner-spin-button {
    -webkit-appearance: none; /* Chrome, Safari, Edge, Opera - hide spinners */
    margin: 0;
}
.stepper-value:focus {
    outline: none; /* Handled by stepper focus potentially */
}

/* Hide original quantity-label for items using the stepper */
.uses-stepper-input .option .quantity-label {
    display: none;
}


/* Summary Styles */
.configurator-summary h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--primary);
    font-weight: 600;
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--primary-light);
}

#total-price-one-time, #total-price-monthly {
    font-size: 1.15rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background-color: #f9fafb;
}

#total-price-one-time span, #total-price-monthly span {
    color: var(--accent);
    font-size: 1.3rem;
    font-weight: 700;
    float: right;
}

.summary-notes {
    font-size: 0.9em;
    color: var(--neutral);
    margin-top: var(--spacing-lg);
    border-top: 1px solid #e5e7eb;
    padding-top: var(--spacing-md);
}

.summary-notes p {
    margin-bottom: var(--spacing-sm);
}

/* Print Button Style */
.print-button {
    display: block; 
    width: 100%;    
    padding: 12px 16px;
    margin: var(--spacing-lg) 0; 
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary); 
    border: none;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    text-align: center;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-sm);
}

.print-button:hover {
    background-color: var(--primary-dark); 
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.print-button:active {
    transform: translateY(1px);
    box-shadow: var(--shadow-sm);
}

.contact-info {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid #e5e7eb;
}

.contact-info h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.contact-info p {
    font-size: 0.95em;
    margin-bottom: var(--spacing-xs);
    color: var(--neutral-dark);
}

/* Footer */
footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid #e5e7eb;
    font-size: 0.9em;
    color: var(--neutral);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .configurator-container {
        flex-direction: column;
        gap: var(--spacing-lg);
        padding: var(--spacing-sm);
    }

    .configurator-main,
    .configurator-summary {
        min-width: 0;
        width: 100%;
        box-sizing: border-box;
    }

    .configurator-summary {
        margin-top: var(--spacing-lg);
        box-shadow: none;
        border: none;
        padding: var(--spacing-md) var(--spacing-sm);
        position: relative !important; 
        top: auto !important;
        width: 100% !important; 
        max-height: none; 
        overflow-y: visible; 
    }

    .category {
        padding: var(--spacing-md) var(--spacing-sm);
        margin-bottom: var(--spacing-lg);
    }

    .item {
        padding-bottom: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }

    .option {
        flex-wrap: wrap; 
        padding: var(--spacing-sm) 0;
        font-size: 1em;
    }
    
    .option > label:not([for$="-qty"]), 
    .option .option-label-text { 
        flex-basis: calc(100% - 150px); /* Adjust based on stepper/price width */
        margin-bottom: var(--spacing-xs); 
        margin-right: var(--spacing-sm);
        line-height: 1.3;
    }

    .option input[type="checkbox"],
    .option input[type="radio"] {
        width: 1.3em;
        height: 1.3em;
        margin-right: var(--spacing-sm);
        flex-shrink: 0;
    }
        
    .quantity-input:not(.stepper-value) { /* For non-stepper inputs on mobile */
        width: 50px; 
        padding: 6px;
        font-size: 0.9em;
    }
    .quantity-label { /* For non-stepper inputs on mobile */
        font-size: 0.9em;
        margin-left: var(--spacing-xs);
        margin-right: var(--spacing-sm);
    }

    /* Stepper adjustments for mobile */
    .quantity-stepper-wrapper {
        margin-left: var(--spacing-sm); /* Adjust spacing from label text */
        margin-right: 0; /* Unit price will have its own margin */
    }
    .quantity-btn {
        padding: 5px 8px; /* Smaller buttons */
        font-size: 1rem;
        height: 32px;
    }
    .stepper-value {
        width: 40px; /* Smaller input field */
        font-size: 0.9rem;
        height: 32px;
    }
    .stepper-unit-label {
        font-size: 0.85em;
        margin-right: var(--spacing-sm);
    }


    .option .unit-price { 
        font-size: 0.85em;
        min-width: 90px; /* Adjust if needed */
        margin-left: auto; /* Push to right */
        flex-basis: auto; /* Allow it to take needed space */
    }
    .option .price:not(.unit-price) { /* For single checkbox prices */
        font-size: 0.9em;
        margin-left: auto;
    }

    .option .notes {
        display: block;
        width: 100%;
        margin-top: var(--spacing-xs);
        margin-left: 0; 
        font-size: 0.8em;
    }

    .option.user-input-price {
        flex-wrap: wrap; 
    }

    .option.user-input-price p.notes {
        margin-left: 0;
        width: 100%;
        padding-top: var(--spacing-xs);
        padding-left: var(--spacing-sm);
    }

    #item-12-input,
    #item-6g-quantity { /* Non-stepper special inputs */
        width: 70px;
        font-size: 0.9em;
        margin: 0 var(--spacing-xs);
        padding: 8px;
    }
     #item-6g-enable + label { /* Label for ethernet checkbox */
        flex-basis: calc(100% - 30px); /* Adjust to prevent awkward wrapping */
    }


    header {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
    
    header h1 {
        font-size: 1.5rem;
    }
    
    header p {
        font-size: 1rem;
    }

    .print-button {
        font-size: 1.1em;
        padding: 16px 0;
        margin: var(--spacing-md) 0;
        border-radius: var(--border-radius-md);
    }

    .contact-info {
        font-size: 1em;
        padding-top: var(--spacing-sm);
    }

    footer {
        font-size: 0.95em;
        padding-top: var(--spacing-md);
    }
}

/* Add print-specific styles */
@media print {
    body * {
        visibility: hidden; 
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important; 
    }

    #print-area, #print-area * {
        visibility: visible; 
    }

    #print-area {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        padding: 20px; /* Adjust as needed for printer margins */
        font-size: 10pt; /* Base font size for print */
    }

    #print-area .container { 
        padding: 0 !important; 
        max-width: none !important; 
    }

    #print-area .header {
        text-align: center;
        margin-bottom: 20px; /* Reduced margin */
        padding-bottom: 10px; /* Reduced padding */
        border-bottom: 2px solid #2563eb !important;
    }
    #print-area .header .logo {
        font-size: 24pt; /* Adjusted */
        font-weight: bold;
        margin-bottom: 3px;
        color: #2563eb !important;
    }
    #print-area .header h1 {
        color: #1e3a8a !important;
        margin: 0 0 5px 0; /* Reduced margin */
        font-size: 18pt; /* Adjusted */
    }
    #print-area .header p {
        color: #6b7280 !important;
        margin: 3px 0;
        font-size: 10pt; /* Adjusted */
    }
    #print-area .date {
        text-align: right;
        margin-bottom: 15px; /* Reduced margin */
        font-size: 9pt;
        color: #6b7280 !important;
    }

    #print-area h2 {
        font-size: 14pt; /* Adjusted */
        margin-top: 20px; /* Reduced margin */
        margin-bottom: 10px; /* Reduced margin */
        color: #2563eb !important;
        border-bottom: 1px solid #dbeafe !important;
        padding-bottom: 3px;
    }

    #print-area ul.items-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    #print-area li.item {
        margin-bottom: 7px; /* Reduced margin */
        padding-bottom: 5px; /* Reduced padding */
        border-bottom: 1px dotted #e5e7eb !important;
        page-break-inside: avoid;
        display: flex;
        justify-content: space-between;
    }
    #print-area li.item:last-child {
        border-bottom: none;
    }

    #print-area li.category-header {
        border-bottom: none !important;
        padding-bottom: 0;
        margin-bottom: 3px;
    }

    #print-area .item-category { 
        font-size: 12pt !important; /* Adjusted */
        font-weight: bold;
        color: #1e3a8a !important; 
        margin-top: 10px; 
        padding-bottom: 2px;
        border-bottom: 1px solid #dbeafe !important; 
    }

    #print-area .item-details {
        flex-grow: 1;
        padding-right: 10px; /* Reduced padding */
    }

    #print-area .item-title {
        font-weight: bold;
        color: #1f2937 !important;
        display: block;
        margin-bottom: 2px;
        font-size: 10pt;
    }

    #print-area .option-name {
        display: block;
        font-size: 9pt;
    }

    #print-area .item-note {
        font-style: italic;
        font-size: 8pt;
        color: #6b7280 !important;
        margin-top: 2px;
    }

    #print-area .price {
        font-weight: bold;
        color: #059669 !important;
        white-space: nowrap;
        align-self: flex-start;
        text-align: right;
        min-width: 70px; /* Adjusted */
        font-size: 10pt;
    }

    #print-area .totals {
        margin-top: 20px; /* Reduced margin */
        padding-top: 10px; /* Reduced padding */
        border-top: 2px solid #1f2937 !important;
    }

    #print-area .total-row {
        display: flex;
        justify-content: space-between;
        margin-bottom: 3px;
        font-size: 10pt; /* Adjusted */
        font-weight: 500;
    }
    #print-area .total-row.monthly {
        margin-top: 7px; /* Reduced margin */
        padding-top: 7px; /* Reduced padding */
        border-top: 1px dashed #e5e7eb !important;
    }
    #print-area .total-value {
        font-weight: bold;
        color: #059669 !important;
    }

    #print-area .footer-notes {
        margin-top: 25px; /* Reduced margin */
        padding-top: 10px; /* Reduced padding */
        border-top: 1px solid #e5e7eb !important;
        font-size: 8pt; /* Adjusted */
        color: #6b7280 !important;
    }
    #print-area .footer-notes p {
        margin-bottom: 3px;
    }

    #print-area .contact-info {
        margin-top: 25px; /* Reduced margin */
        padding-top: 10px; /* Reduced padding */
        border-top: 1px solid #e5e7eb !important;
        text-align: center;
        font-size: 9pt; /* Adjusted */
    }
    #print-area .contact-info p {
        margin: 3px 0;
    }

    .configurator-summary button, 
    .configurator-summary .contact-info, 
    footer,
    .quantity-stepper /* Hide stepper UI in print, just show the result */
     { 
        display: none !important;
    }
     .option-label-text::after { /* Hide visual tags in print */
        display: none !important;
    }
}

html, body {
    max-width: 100vw;
    overflow-x: hidden;
}

input[type="checkbox"], input[type="radio"] {
    min-width: 1.3em;
    min-height: 1.3em;
}