/* Laptop Selector - Smart Discovery Engine Styles */

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

:root {
    /* === NEW UI REVAMP v5.0 COLOR PALETTE === */

    /* Base backgrounds */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #F1F5F9;

    /* Text colors */
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;

    /* Brand/Trust colors (blue) */
    --brand-primary: #2563EB;
    --brand-dark: #1D4ED8;
    --brand-light: #DBEAFE;

    /* CTA colors (orange - high converting) */
    --cta-primary: #F97316;
    --cta-hover: #EA580C;
    --cta-secondary: #10B981;

    /* Accent colors */
    --accent-warning: #F59E0B;
    --accent-danger: #EF4444;
    --accent-success: #10B981;

    /* Borders and shadows */
    --border-light: #E2E8F0;
    --border-medium: #CBD5E1;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);

    /* Glassmorphism */
    --glass-bg: rgba(255,255,255,0.8);
    --glass-bg-dark: rgba(255,255,255,0.6);
    --glass-blur: blur(10px);
    --glass-border: rgba(255,255,255,0.3);

    /* Legacy aliases (for backward compatibility) */
    --primary-color: var(--brand-primary);
    --primary-dark: var(--brand-dark);
    --secondary-color: var(--cta-secondary);
    --accent-color: var(--accent-warning);
    --bg-color: var(--bg-secondary);
    --card-bg: var(--bg-primary);
    --border-color: var(--border-light);
    --shadow: var(--shadow-sm);
}

/* === GLASSMORPHISM UTILITY CLASSES === */

.glass {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.glass-dark {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 1.5rem;
}

/* === CTA BUTTON STYLES (High Converting Orange) === */

.btn-cta-primary {
    background: linear-gradient(135deg, var(--cta-primary), var(--cta-hover));
    color: white !important;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
    background: linear-gradient(135deg, var(--cta-hover), #C2410C);
    color: white !important;
    text-decoration: none;
}

.btn-cta-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

/* Large CTA (for mobile Buy Now buttons) */
.btn-cta-large {
    background: linear-gradient(135deg, var(--cta-primary), var(--cta-hover));
    color: white !important;
    border: none;
    padding: 16px 32px;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
    width: 100%;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-cta-large:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(249, 115, 22, 0.45);
    color: white !important;
    text-decoration: none;
}

/* Secondary CTA (green - for Save/Success actions) */
.btn-cta-secondary {
    background: linear-gradient(135deg, var(--cta-secondary), #059669);
    color: white !important;
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
    text-decoration: none;
}

.btn-cta-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
    color: white !important;
    text-decoration: none;
}

/* Outline button (for secondary actions) */
.btn-outline-brand {
    background: transparent;
    color: var(--brand-primary);
    border: 2px solid var(--brand-primary);
    padding: 10px 22px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-outline-brand:hover {
    background: var(--brand-primary);
    color: white !important;
    text-decoration: none;
}

/* === TYPOGRAPHY SCALE === */

.text-display {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.text-h1 {
    font-size: 2.25rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.text-h2 {
    font-size: 1.875rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-primary);
}

.text-h3 {
    font-size: 1.5rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

.text-h4 {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
}

.text-body {
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-primary);
}

.text-body-sm {
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-secondary);
}

.text-caption {
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.text-brand {
    color: var(--brand-primary);
}

.text-cta {
    color: var(--cta-primary);
}

.text-success {
    color: var(--accent-success);
}

.text-muted {
    color: var(--text-muted);
}

/* === CARD COMPONENTS === */

.card-modern {
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.card-modern:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-modern-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

.card-modern-body {
    padding: 1.25rem;
}

.card-modern-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-light);
    background: var(--bg-secondary);
}

/* Laptop Card (for grid view) */
.laptop-card {
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.laptop-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--brand-primary);
}

.laptop-card-image {
    width: 100%;
    height: 160px;
    object-fit: contain;
    background: var(--bg-tertiary);
    padding: 1rem;
}

.laptop-card-body {
    padding: 1rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.laptop-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.laptop-card-specs {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.laptop-card-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.laptop-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.laptop-card-badge.best-value {
    background: linear-gradient(135deg, var(--accent-warning), #D97706);
    color: white;
}

.laptop-card-badge.great-value {
    background: var(--brand-light);
    color: var(--brand-dark);
}

.laptop-card-footer {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

/* === SPACING UTILITIES === */

.gap-xs { gap: 0.25rem; }
.gap-sm { gap: 0.5rem; }
.gap-md { gap: 1rem; }
.gap-lg { gap: 1.5rem; }
.gap-xl { gap: 2rem; }

.p-xs { padding: 0.25rem; }
.p-sm { padding: 0.5rem; }
.p-md { padding: 1rem; }
.p-lg { padding: 1.5rem; }
.p-xl { padding: 2rem; }

.m-xs { margin: 0.25rem; }
.m-sm { margin: 0.5rem; }
.m-md { margin: 1rem; }
.m-lg { margin: 1.5rem; }
.m-xl { margin: 2rem; }

.rounded-sm { border-radius: 4px; }
.rounded-md { border-radius: 8px; }
.rounded-lg { border-radius: 12px; }
.rounded-xl { border-radius: 16px; }
.rounded-full { border-radius: 9999px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    /* No padding needed - header is static and flows naturally */
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 12px;
    margin-bottom: 30px;
    box-shadow: var(--shadow-lg);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

header .tagline {
    font-size: 1.1rem;
    opacity: 0.95;
}

/* OS Filter Section */
.os-filter-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 15px;
}

.os-filter-section label {
    font-weight: 600;
    color: var(--text-primary);
}

#os-filter {
    padding: 10px 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s;
}

#os-filter:hover {
    border-color: var(--primary-color);
}

/* Parameter Selection */
.param-selection {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.instruction h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.instruction p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.param-pool, .param-selected-area {
    margin: 20px 0;
}

.param-pool h3, .param-selected-area h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.param-container {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    min-height: 100px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 8px;
    border: 2px dashed var(--border-color);
}

.selected-container {
    min-height: 120px;
    background: #fef3c7;
    border-color: var(--accent-color);
    gap: 24px; /* Increased gap for better visual separation */
    padding: 24px; /* More padding for breathing room */
}

.dropzone-hint {
    width: 100%;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 30px 0;
}

/* Parameter Boxes */
.param-box {
    padding: 12px 20px;
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: 8px;
    cursor: move;
    user-select: none;
    transition: all 0.3s;
    box-shadow: var(--shadow);
    position: relative;
    margin: 4px; /* Additional margin for extra spacing */
}

.param-box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-dark);
}

.param-box.dragging {
    opacity: 0.5;
    transform: rotate(5deg);
}

.param-box.in-selection {
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

/* Priority indicators */
.param-box.in-selection::before {
    content: attr(data-priority);
    position: absolute;
    top: -8px;
    left: -8px;
    background: var(--accent-color);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    font-weight: 700;
    border: 3px solid white;
}

/* Size variation based on priority */
.param-box.priority-1 { transform: scale(1.15); }
.param-box.priority-2 { transform: scale(1.1); }
.param-box.priority-3 { transform: scale(1.05); }
.param-box.priority-4 { transform: scale(1.0); }
.param-box.priority-5 { transform: scale(0.95); }

.param-name {
    display: block;
    font-size: 0.95rem;
}

/* Button */
.btn-primary {
    display: block;
    width: 100%;
    padding: 15px 30px;
    background: linear-gradient(135deg, var(--secondary-color), #059669);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s;
    box-shadow: var(--shadow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    opacity: 0.6;
}

.validation-msg {
    margin-top: 10px;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    font-size: 0.9rem;
}

.validation-msg.error {
    background: #fee2e2;
    color: #991b1b;
}

.validation-msg.success {
    background: #d1fae5;
    color: #065f46;
}

/* Visualization Section */
.visualization-section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.visualization-section h2 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.viz-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

#visualization-container {
    position: relative;
    width: 100%;
    height: 600px;
    min-height: 600px; /* Ensure explicit height for Chrome */
    background: #fafafa;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
}

#scatter-plot {
    width: 100%;
    height: 100%;
    cursor: crosshair;
}

/* Tooltip - Enhanced visibility */
.tooltip {
    position: absolute;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.95), rgba(30, 64, 175, 0.95));
    color: white;
    padding: 12px 18px;
    border-radius: 10px;
    font-size: 0.9rem;
    pointer-events: none;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
    max-width: 280px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transform: translateY(-5px);
}

.tooltip.show {
    opacity: 1;
    transform: translateY(0);
}

.tooltip::after {
    content: '';
    position: absolute;
    top: -5px;
    left: 10px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid rgba(37, 99, 235, 0.95);
}

/* Loading Spinner - Enhanced with better visibility */
#loading-spinner {
    position: relative;
    z-index: 100;
}

.spinner {
    text-align: center;
    padding: 40px;
    animation: fadeIn 0.3s ease-in;
}

.spinner-icon {
    width: 60px;
    height: 60px;
    border: 5px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-right-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite, pulse 1.5s ease-in-out infinite;
    margin: 0 auto 15px;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.spinner p {
    color: var(--primary-color);
    font-weight: 600;
    animation: fade 1.5s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes fade {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: white;
    padding: 30px;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 20px 25px -5px rgb(0 0 0 / 0.1);
}

.close {
    float: right;
    font-size: 28px;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}

.close:hover {
    color: var(--text-primary);
}

#laptop-list {
    margin-top: 20px;
}

.laptop-item {
    padding: 18px;
    margin: 12px 0;
    background: var(--bg-color);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all 0.3s;
}

.laptop-item:hover {
    background: white;
    border-color: var(--primary-color);
    transform: translateX(8px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
}

.laptop-item h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
}

#modal-title {
    color: var(--primary-color);
    margin-bottom: 5px;
}

#modal-subtitle {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Footer */
footer {
    text-align: center;
    padding: 30px 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 40px;
}

/* Page Tour Guide */
#tour-guide-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.4);
    z-index: 1500;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: bounce 2s ease-in-out infinite;
}

#tour-guide-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.6);
}

#tour-guide-btn .help-icon {
    font-size: 2rem;
    font-weight: bold;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Tour Tooltip/Modal */
.tour-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2500;
    display: none;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s;
}

.tour-modal.active {
    display: flex;
}

.tour-content {
    background: white;
    padding: 35px;
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.4s;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tour-content h2 {
    color: var(--primary-color);
    margin-bottom: 20px;
    font-size: 1.8rem;
}

.tour-content h3 {
    color: var(--primary-dark);
    margin-top: 25px;
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.tour-content p {
    margin-bottom: 12px;
    line-height: 1.8;
    color: var(--text-primary);
}

.tour-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.tour-content li {
    margin-bottom: 8px;
    line-height: 1.6;
}

.tour-content strong {
    color: var(--primary-color);
}

.tour-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 2rem;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
}

.tour-close:hover {
    background: var(--bg-color);
    color: var(--primary-color);
    transform: rotate(90deg);
}

.tour-step-badge {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-right: 10px;
}

/* Responsive Design - Mobile First Approach */

/* Tablet: 640px - 1024px */
@media (max-width: 1024px) {
    .container {
        padding: 15px;
    }

    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 2rem;
    }

    .param-selection {
        padding: 25px 20px;
    }

    .visualization-section {
        padding: 25px 20px;
    }

    #visualization-container {
        height: 500px;
    }

    .modal-content {
        width: 95%;
        max-width: 600px;
        padding: 25px;
    }
}

/* Mobile: < 640px */
@media (max-width: 640px) {
    /* Container & Spacing */
    .container {
        padding: 10px;
    }

    /* Header */
    header {
        padding: 20px 15px;
        margin-bottom: 15px;
    }

    header h1 {
        font-size: 1.5rem;
        line-height: 1.2;
    }

    header .tagline {
        font-size: 0.9rem;
    }

    /* OS Filter */
    .os-filter-section {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 15px;
    }

    #os-filter {
        width: 100%;
        padding: 12px 15px;
        font-size: 1rem;
    }

    /* Parameter Selection */
    .param-selection {
        padding: 20px 15px;
    }

    .instruction h2 {
        font-size: 1.3rem;
    }

    .instruction p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    /* Parameter Containers */
    .param-container {
        gap: 10px;
        padding: 15px;
        min-height: 80px;
    }

    .selected-container {
        gap: 12px;
        padding: 15px;
        min-height: 100px;
    }

    /* Parameter Boxes - Touch Optimized */
    .param-box {
        font-size: 0.85rem;
        padding: 12px 16px;
        margin: 2px;
        min-height: 44px; /* Touch target minimum */
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .param-box.in-selection {
        padding: 10px 14px;
    }

    /* Priority badges - slightly smaller but still visible */
    .param-box.in-selection::before {
        width: 24px;
        height: 24px;
        font-size: 0.75rem;
        top: -6px;
        left: -6px;
        border: 2px solid white;
    }

    /* Priority scaling - less dramatic on mobile */
    .param-box.priority-1 { transform: scale(1.05); }
    .param-box.priority-2 { transform: scale(1.03); }
    .param-box.priority-3 { transform: scale(1.0); }
    .param-box.priority-4 { transform: scale(0.98); }
    .param-box.priority-5 { transform: scale(0.96); }

    /* Button - Touch Optimized */
    .btn-primary {
        padding: 16px 30px;
        font-size: 1.05rem;
        margin-top: 15px;
        min-height: 50px; /* Touch friendly */
    }

    .validation-msg {
        font-size: 0.85rem;
        padding: 8px;
    }

    /* Visualization Section */
    .visualization-section {
        padding: 20px 15px;
    }

    .visualization-section h2 {
        font-size: 1.3rem;
    }

    .viz-description {
        font-size: 0.85rem;
    }

    #visualization-container {
        height: 350px; /* Optimized for mobile viewing */
        min-height: 350px;
    }

    /* Canvas - ensure it scales properly */
    #scatter-plot {
        touch-action: pan-y; /* Allow vertical scrolling */
    }

    /* Tooltip - adjusted for mobile */
    .tooltip {
        font-size: 0.85rem;
        padding: 8px 12px;
        max-width: 200px;
    }

    /* Modal - Full Screen on Mobile */
    .modal-content {
        width: 100%;
        height: 100%;
        max-width: 100%;
        max-height: 100%;
        border-radius: 0;
        padding: 20px 15px;
        overflow-y: auto;
    }

    .close {
        font-size: 32px;
        line-height: 0.8;
        padding: 10px;
    }

    #modal-title {
        font-size: 1.3rem;
        line-height: 1.3;
    }

    #modal-subtitle {
        font-size: 0.85rem;
        margin-top: 8px;
        margin-bottom: 15px;
    }

    /* Laptop Cards - Mobile Optimized */
    .laptop-item {
        padding: 15px;
        margin: 10px 0;
    }

    .laptop-item:hover {
        transform: translateX(0); /* Remove slide on mobile */
    }

    /* Laptop card content - stack on mobile */
    .laptop-item > div[style*="display: flex"] {
        flex-direction: column !important;
        gap: 12px !important;
    }

    .laptop-item h4 {
        font-size: 0.95rem;
    }

    .laptop-item [style*="text-align: right"] {
        text-align: left !important;
        border-top: 1px solid var(--border-color);
        padding-top: 10px;
    }

    .laptop-item [style*="font-size: 1.3rem"] {
        font-size: 1.1rem !important;
    }

    /* Footer */
    footer {
        padding: 20px 15px;
        font-size: 0.8rem;
        margin-top: 30px;
    }

    footer p {
        line-height: 1.5;
    }
}

/* Extra Small Mobile: < 375px */
@media (max-width: 375px) {
    header h1 {
        font-size: 1.3rem;
    }

    .param-box {
        font-size: 0.8rem;
        padding: 10px 14px;
    }

    .btn-primary {
        font-size: 1rem;
        padding: 14px 25px;
    }

    #visualization-container {
        height: 300px;
        min-height: 300px;
    }

    .laptop-item {
        padding: 12px;
    }

    .laptop-item h4 {
        font-size: 0.9rem;
    }
}

/* Landscape Mode on Mobile */
@media (max-height: 500px) and (orientation: landscape) {
    header {
        padding: 15px;
        margin-bottom: 10px;
    }

    header h1 {
        font-size: 1.3rem;
    }

    .param-selection {
        padding: 15px;
    }

    #visualization-container {
        height: 250px;
        min-height: 250px;
    }

    .modal-content {
        height: 100vh;
        overflow-y: auto;
    }
}

/* Large Desktop: > 1400px */
@media (min-width: 1400px) {
    .container {
        max-width: 1600px;
    }

    #visualization-container {
        height: 700px;
    }
}

/* ============================================
   RESPONSIVE FLUID LAYOUT - DASH APP
   Added: 2025-11-19 (v4.11.0)
   ============================================ */

/* Base styles for hover panel (mobile-first) */
.hover-panel {
    background-color: #f8f9fa;
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 1rem;
}

/* Mobile-specific hover panel (simplified format) */
.mobile-simplified-hover {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mobile-simplified-hover h6 {
    font-size: 16px;
    margin-bottom: 4px;
    font-weight: 600;
}

.mobile-simplified-hover p {
    font-size: 14px;
    line-height: 1.4;
    color: #6c757d;
}

.mobile-simplified-hover .btn {
    font-size: 16px;
    padding: 12px;
    font-weight: 600;
}

/* Graph instructions - change text based on device */
.graph-instructions {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-top: 8px;
    font-style: italic;
}

/* Mobile: < 992px (phones and tablets) */
@media (max-width: 991px) {
    /* MOBILE LAYOUT ORDER: Filters → Graph → Mobile Panel */
    /* Override the natural HTML order using flexbox order property */
    .filter-column {
        order: 0 !important;
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
        overflow-y: visible !important;  /* Allow vertical expansion */
    }

    /* Ensure all child elements respect container width on mobile */
    .filter-column * {
        max-width: 100%;
        box-sizing: border-box;
    }

    .graph-column {
        order: 1 !important;  /* Graph shows FIRST on mobile */
    }

    .hover-column-mobile {
        order: 2 !important;  /* Mobile panel shows AFTER graph */
    }

    /* Ensure row uses flexbox for ordering */
    .row {
        display: flex;
        flex-wrap: wrap;
    }

    /* Mobile laptop details panel: hidden by default on mobile, shows only on click */
    .hover-panel-mobile {
        position: relative !important;
        top: 0 !important;
        min-height: auto !important;
        padding: 10px !important;
        margin-bottom: 1rem;
        /* Hidden by default - will show when user taps a laptop */
        display: none !important;
    }

    /* When laptop details are active on mobile, show the panel */
    .hover-panel-mobile.active {
        display: block !important;
    }

    /* Condensed mobile format */
    .hover-panel-mobile.mobile-condensed {
        padding: 10px !important;
        font-size: 13px !important;
    }

    .hover-panel-mobile.mobile-condensed h6 {
        font-size: 15px !important;
        margin-bottom: 8px !important;
    }

    .hover-panel-mobile.mobile-condensed p {
        margin-bottom: 4px !important;
        font-size: 12px !important;
        line-height: 1.3 !important;
    }

    /* Compact buy button on mobile */
    .hover-panel-mobile.mobile-condensed .amazon-buy-link {
        padding: 10px !important;
        font-size: 15px !important;
        margin-top: 8px !important;
    }

    /* Desktop laptop details panel: hidden on mobile */
    .hover-panel-desktop {
        display: none !important;
    }

    /* Visual grouping for filter collapse content */
    .filter-collapse-content {
        border: 2px solid #0d6efd;
        border-radius: 8px;
        padding: 10px;
        margin-top: 8px;
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
        overflow-y: visible !important;  /* Allow vertical expansion, no scrollbar */
    }

    /* Graph: Fix width overflow on mobile */
    #scatter-plot {
        height: 350px !important;
        max-width: 100% !important;
        width: 100% !important;
    }

    .graph-column {
        max-width: 100% !important;
        overflow-x: hidden !important;
        padding-left: 12px !important;
        padding-right: 12px !important;
    }

    /* Plotly graph container - prevent overflow */
    .js-plotly-plot {
        max-width: 100% !important;
        overflow: hidden !important;
    }

    .plotly {
        max-width: 100% !important;
    }

    /* Filter collapse component - prevent any overflow */
    #filter-collapse {
        overflow-x: hidden !important;
        overflow-y: visible !important;
    }

    /* Filter panel adjustments */
    #feature-list {
        max-height: none !important;
        overflow-y: visible !important;
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
    }

    /* Ensure ALL children respect container width on mobile */
    #feature-list > * {
        max-width: 100% !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }

    /* Flex containers inside filters on mobile */
    #feature-list .d-flex {
        max-width: 100% !important;
        overflow-x: hidden !important;
    }

    /* RC-slider components on mobile */
    #feature-list .rc-slider {
        max-width: 100% !important;
        overflow-x: visible !important;  /* Allow slider to breathe */
    }

    #feature-list .rc-slider-step {
        max-width: 100% !important;
    }

    #feature-list .rc-slider-mark {
        max-width: 100% !important;
        overflow-x: visible !important;  /* Allow price labels to show */
    }

    /* Filter collapse button styling */
    #filter-collapse-button {
        font-size: 16px;
        font-weight: 600;
        padding: 12px;
    }

    /* Larger touch targets for priority arrows */
    button[id*="up-btn"],
    button[id*="down-btn"] {
        min-width: 44px !important;
        min-height: 44px !important;
        font-size: 18px !important;
        padding: 8px !important;
    }

    /* Price slider - larger handle for touch */
    .price-slider-with-histogram .rc-slider-handle {
        width: 24px;
        height: 24px;
        margin-top: -10px;
    }

    /* Top 10 table - hide thead and make responsive cards */
    #top10-table table {
        width: 100%;
        border: none;
    }

    #top10-table thead {
        display: none; /* Hide table header on mobile */
    }

    #top10-table tbody {
        display: block;
    }

    #top10-table tr {
        display: block;
        border: 1px solid #dee2e6;
        border-radius: 8px;
        padding: 12px;
        margin-bottom: 12px;
        background: white;
        box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    }

    #top10-table td {
        display: block;
        text-align: left !important;
        padding: 6px 0;
        border: none;
    }

    /* Hide less important columns on mobile */
    #top10-table td[data-label="Graphics"],
    #top10-table td[data-label="Resolution"],
    #top10-table td[data-label="Operating System"],
    #top10-table td[data-label="Screen (in)"] {
        display: none !important;
    }

    /* Show label before content on mobile */
    #top10-table td::before {
        content: attr(data-label) ": ";
        font-weight: 600;
        color: #495057;
        display: inline-block;
        min-width: 90px;
    }

    /* Special formatting for specific columns */
    #top10-table td[data-label="Model"] {
        font-size: 14px;
        font-weight: 600;
        color: #0056b3;
        border-bottom: 1px solid #e9ecef;
        padding-bottom: 8px;
        margin-bottom: 8px;
    }

    #top10-table td[data-label="Model"]::before {
        display: none; /* Don't show "Model:" label */
    }

    #top10-table td[data-label="Buy"] {
        margin-top: 10px;
        padding-top: 10px;
        border-top: 1px solid #e9ecef;
    }

    #top10-table td[data-label="Buy"]::before {
        display: none; /* Don't show "Buy:" label */
    }

    /* Buy buttons full-width on mobile */
    .amazon-buy-link {
        width: 100% !important;
        display: block !important;
        text-align: center;
        margin-top: 8px;
        padding: 12px !important;
        font-size: 16px !important;
    }

    /* Checklist items wrap better on mobile */
    .checklist-item {
        display: block;
        margin-bottom: 8px;
    }

    /* Graph instructions for mobile/tablet */
    .graph-instructions::after {
        content: "Tap a laptop to see details";
    }

    /* Cookie consent banner - make responsive */
    #cookie-consent-banner {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        border-radius: 0 !important;
        padding: 15px !important;
    }

    #cookie-consent-banner .cookie-consent-buttons {
        display: flex;
        flex-direction: column;
        gap: 8px;
        margin-top: 10px;
    }

    #cookie-consent-banner button {
        width: 100% !important;
        margin: 0 !important;
        padding: 12px !important;
        font-size: 14px !important;
    }

    /* Ensure container doesn't cause horizontal scroll */
    .container-fluid {
        padding-left: 12px !important;
        padding-right: 12px !important;
        overflow-x: hidden !important;
    }

    /* Prevent any element from causing horizontal overflow */
    * {
        max-width: 100%;
    }
}

/* Tablet: 768px - 991px */
@media (min-width: 768px) and (max-width: 991px) {
    /* Graph slightly taller on tablets */
    #scatter-plot {
        height: 400px !important;
    }

    /* Hover panel slightly more padding */
    .hover-panel {
        padding: 15px !important;
    }
}

/* Desktop: ≥ 992px */
@media (min-width: 992px) {
    /* Desktop: Hide mobile panel, show desktop panel */
    .hover-panel-mobile {
        display: none !important;
    }

    .hover-panel-desktop {
        display: block !important;
        position: sticky !important;
        top: 20px;
        min-height: 480px;
        padding: 15px !important;
    }

    /* Graph full height on desktop */
    #scatter-plot {
        height: 480px !important;
    }

    /* Filter column overflow control on desktop */
    .filter-column {
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
        overflow-y: visible !important;  /* Allow vertical expansion */
    }

    /* Ensure all child elements respect container width */
    .filter-column * {
        max-width: 100%;
        box-sizing: border-box;
    }

    /* Filter collapse component - prevent any overflow on desktop */
    #filter-collapse {
        overflow-x: hidden !important;
        overflow-y: visible !important;
    }

    /* Filter panel - NO scrollbars, content expands naturally */
    /* ===================================================================
     * OVERFLOW BEHAVIOR:
     * - overflow-x: hidden = Never show horizontal scrollbar
     * - overflow-y: NOT SET = Defaults to visible, allows natural expansion
     * - Removed max-height to allow full content display without scrolling
     * ===================================================================
     */
    #feature-list {
        /* Removed max-height and overflow-y:auto to prevent unwanted scrollbars */
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
    }

    /* Ensure ALL children respect container width */
    #feature-list > * {
        max-width: 100% !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }

    /* Flex containers inside filters */
    #feature-list .d-flex {
        max-width: 100% !important;
        overflow-x: hidden !important;
    }

    /* RC-slider components */
    #feature-list .rc-slider {
        max-width: 100% !important;
        overflow-x: visible !important;  /* Allow slider to breathe */
    }

    #feature-list .rc-slider-step {
        max-width: 100% !important;
    }

    #feature-list .rc-slider-mark {
        max-width: 100% !important;
        overflow-x: visible !important;  /* Allow price labels to show */
    }

    /* No visual border on filter content on desktop */
    .filter-collapse-content {
        border: none;
        padding: 0;
        margin-top: 0;
        overflow-x: hidden !important;  /* Prevent horizontal scrollbar */
        overflow-y: visible !important;  /* Allow vertical expansion */
    }

    /* Priority arrows normal size on desktop */
    button[id*="up-btn"],
    button[id*="down-btn"] {
        min-width: auto;
        min-height: 22px;
        font-size: 14px;
    }

    /* Graph instructions for desktop */
    .graph-instructions::after {
        content: "Hover over a laptop to see details";
    }
}

/* ============================================================================
 * AGGRESSIVE SCROLLBAR PREVENTION - HIGHEST SPECIFICITY
 * Apply to filter column to prevent ANY scrollbar from appearing
 * ============================================================================ */
.no-scrollbar-enforce,
.no-scrollbar-enforce.filter-column,
div.no-scrollbar-enforce.filter-column {
    overflow-y: visible !important;
    overflow-x: hidden !important;
    max-height: none !important;
}

/* Also apply to all children to prevent nested scrollbars */
.no-scrollbar-enforce #filter-collapse,
.no-scrollbar-enforce .filter-collapse-content,
.no-scrollbar-enforce #feature-list {
    overflow-y: visible !important;
    overflow-x: hidden !important;
    max-height: none !important;
}

/* Touch device-specific optimizations */
@media (hover: none) and (pointer: coarse) {
    /* All buttons and links: larger touch targets */
    button,
    a.btn,
    .btn {
        min-height: 44px;
        min-width: 44px;
        padding: 10px 16px;
    }

    /* Plotly graph points: ensure they're tappable */
    .plotly .point {
        pointer-events: all;
        cursor: pointer;
    }

    /* Remove hover effects on touch devices */
    .param-box:hover,
    .laptop-item:hover {
        transform: none;
    }

    /* Simplified hover panel on touch */
    .hover-panel {
        font-size: 14px;
    }
}

/* Extra large desktop: ≥ 1400px */
@media (min-width: 1400px) {
    /* More breathing room on large screens */
    .hover-panel {
        padding: 20px !important;
        min-height: 500px;
    }

    #scatter-plot {
        height: 500px !important;
    }

    #feature-list {
        max-height: 500px;
    }
}

/* High DPI displays (Retina, etc.) */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Ensure crisp rendering on high DPI */
    .hover-panel,
    #scatter-plot {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* ================================================================
   RESET FILTERS BUTTON - Light Red Styling
   ================================================================ */

/* Reset button with light red styling */
#reset-filters-btn {
    border-color: #ff6b6b !important;
    color: #ff6b6b !important;
    font-weight: 500 !important;
    transition: all 0.3s ease;
}

#reset-filters-btn:hover {
    background-color: #ff6b6b !important;
    color: white !important;
    border-color: #ff6b6b !important;
    box-shadow: 0 2px 8px rgba(255, 107, 107, 0.3);
    transform: translateY(-1px);
}

#reset-filters-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px rgba(255, 107, 107, 0.3);
}

#reset-filters-btn .bi {
    transition: transform 0.3s ease;
}

#reset-filters-btn:hover .bi {
    transform: rotate(-180deg);
}

/* Copy Link button with blue styling */
#copy-link-btn {
    border-color: #17a2b8 !important;
    color: #17a2b8 !important;
    font-weight: 500 !important;
    transition: all 0.3s ease;
}

#copy-link-btn:hover {
    background-color: #17a2b8 !important;
    color: white !important;
    border-color: #17a2b8 !important;
    box-shadow: 0 2px 8px rgba(23, 162, 184, 0.3);
    transform: translateY(-1px);
}

#copy-link-btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 3px rgba(23, 162, 184, 0.3);
}

#copy-link-btn .bi {
    transition: transform 0.3s ease;
}

#copy-link-btn:hover .bi {
    transform: rotate(15deg);
}

/* Copy Link tooltip feedback */
#copy-link-tooltip {
    font-size: 12px;
}

/* ================================================================
   BOOTSTRAP NAVBAR - Minimal Overrides
   ================================================================ */

/* Navbar hover effects for links */
.navbar .nav-link {
    transition: color 0.3s ease;
    font-weight: 500;
}

.navbar .nav-link:hover {
    color: var(--primary-color) !important;
}

/* Compact navbar padding */
.navbar {
    min-height: 50px !important;
}

/* ================================================================
   BUY NOW BUTTON OVERRIDES (Orange CTA for Conversions)
   Applied at end of file for maximum specificity
   ================================================================ */

.buy-btn,
.btn-buy,
[class*="buy-btn"],
.table-buy-btn,
a[href*="amazon"].btn {
    background: linear-gradient(135deg, var(--cta-primary), var(--cta-hover)) !important;
    border: none !important;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3) !important;
}

.buy-btn:hover,
.btn-buy:hover,
[class*="buy-btn"]:hover,
.table-buy-btn:hover,
a[href*="amazon"].btn:hover {
    background: linear-gradient(135deg, var(--cta-hover), #C2410C) !important;
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4) !important;
    transform: translateY(-2px);
}