:root {
                --quartz-grey: #F2F2F2;
                --warm-beige: #D6CFC7;
                --charcoal: #1A1A1A;
                --clinical-white: #FFFFFF;
                --glass-border: rgba(26, 26, 26, 0.08);
            }

            body {
                background-color: var(--quartz-grey);
                color: var(--charcoal);
                font-family: 'Inter', sans-serif;
                overflow-x: hidden;
            }

            .serif {
                font-family: 'Cormorant Garamond', serif;
            }

            /* Hero Canvas & Background */
            .clinical-void {
                position: relative;
                background: radial-gradient(circle at center, #FFFFFF 0%, var(--quartz-grey) 100%);
                overflow: hidden;
                min-height: 100vh;
                display: flex;
                align-items: center;
                justify-content: center;
            }

            /* Hex Compound Canvas */
            #hex-canvas {
                position: absolute;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                pointer-events: none;
                opacity: 0.6;
            }

            /* =========================================
   HEADER & NAVIGATION
========================================= */
            .header {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                background: rgba(5, 5, 5, 0.9);
                backdrop-filter: blur(10px);
                -webkit-backdrop-filter: blur(10px);
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                z-index: 100;
            }

            .header-container {
                max-width: 1200px;
                margin: 0 auto;
                padding: 1.25rem 20px;
                display: flex;
                justify-content: space-between;
                align-items: center;
            }

            .logo {
                font-family: 'Inter', sans-serif;
                font-weight: 800;
                font-size: 1.1rem;
                color: var(--charcoal);
                color: #ffffff;
                text-decoration: none;
                letter-spacing: 0.15em;
            }

            .logo .dot {
                color: #10b981;
                color: var(--charcoal);
            }

            .nav {
                display: flex;
                gap: 2rem;
            }

            .nav a {
                font-family: 'Inter', sans-serif;
                font-size: 0.75rem;
                font-weight: 600;
                color: #a1a1aa;
                text-decoration: none;
                letter-spacing: 0.2em;
                transition: color 0.3s ease;
            }

            .nav a:hover,
            .nav a.active {
                color: var(--charcoal);
            }

            /* =========================================
   THE LABORATORY // BLOG GRID
========================================= */
            .lab-hero {
                background-color: var(--clinical-white);
                text-align: center;
                padding: 12rem 1.25rem 6rem;
            }

            .lab-hero-tag {
                color: var(--warm-beige);
                letter-spacing: 0.5em;
                text-transform: uppercase;
                font-size: 0.625rem;
                font-weight: 800;
                margin-bottom: 1rem;
                display: block;
            }

            .lab-hero-title {
                color: var(--charcoal);
                font-size: 3rem;
                margin-bottom: 1rem;
            }

            .lab-hero-subtitle {
                color: #a1a1aa;
                max-width: 500px;
                margin: 0 auto;
                font-size: 0.75rem;
                letter-spacing: 0.2em;
                line-height: 1.6;
            }

            .journal-grid {
                max-width: 1200px;
                margin: 0 auto;
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 30px;
                padding: 6rem 1.25rem;
                background-color: var(--clinical-white);
            }

            .journal-card {
                background-color: var(--clinical-white);
                border: 1px solid var(--glass-border);
                transition: all 0.3s ease;
                text-decoration: none;
                color: inherit;
                display: flex;
                flex-direction: column;
                overflow: hidden;
                transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            }

            .journal-card:hover {
                transform: translateY(-10px);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
            }

            .image-wrapper {
                width: 100%;
                aspect-ratio: 16 / 10;
                overflow: hidden;
                background-color: #F9F9F9;
            }

            .journal-card img {
                width: 100%;
                height: 100%;
                object-fit: cover;
                transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
            }

            .journal-card:hover img {
                transform: scale(1.05);
            }

            .journal-content {
                padding: 24px;
                display: flex;
                flex-direction: column;
                flex-grow: 1;
            }

            .journal-tag {
                font-size: 0.75rem;
                color: var(--warm-beige);
                margin-bottom: 12px;
                display: block;
                letter-spacing: 0.2em;
                font-weight: 700;
            }

            .journal-title {
                color: var(--charcoal);
                font-size: 1.25rem;
                margin-bottom: 10px;
                line-height: 1.4;
            }

            .journal-excerpt {
                color: #a1a1aa;
                font-size: 0.8rem;
                line-height: 1.6;
                font-weight: 300;
                flex-grow: 1;
            }

            .journal-link {
                margin-top: 1.5rem;
                font-size: 0.65rem;
                font-weight: 700;
                letter-spacing: 0.2em;
                text-transform: uppercase;
                color: var(--charcoal);
            }

            @media (max-width: 900px) {
                .journal-grid {
                    grid-template-columns: repeat(2, 1fr);
                }
            }

            @media (max-width: 600px) {
                .journal-grid {
                    grid-template-columns: 1fr;
                }
            }

            .hero-content {
                position: relative;
                z-index: 20;
                text-align: center;
                max-width: 900px;
                padding: 0 20px;
            }

            /* Navigation Links */
            .nav-link {
                text-transform: uppercase;
                letter-spacing: 0.25em;
                font-size: 0.7rem;
                font-weight: 600;
                color: var(--charcoal);
                transition: all 0.3s ease;
            }

            .nav-link:hover {
                color: var(--warm-beige);
            }

            /* Buttons */
            .btn-primary {
                background-color: var(--charcoal);
                color: white;
                padding: 1.25rem 3rem;
                text-transform: uppercase;
                letter-spacing: 0.2em;
                font-size: 0.65rem;
                font-weight: 700;
                transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
                border: 1px solid var(--charcoal);
            }

            .btn-primary:hover {
                background-color: transparent;
                color: var(--charcoal);
                transform: translateY(-2px);
            }

            .btn-secondary {
                border: 1px solid var(--glass-border);
                padding: 1.25rem 3rem;
                text-transform: uppercase;
                letter-spacing: 0.2em;
                font-size: 0.65rem;
                font-weight: 700;
                transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
            }

            .btn-secondary:hover {
                background-color: white;
                transform: translateY(-2px);
            }

            /* Protocol Grid & Cards */
            .protocol-card {
                background: white;
                border: 1px solid var(--glass-border);
                padding: 4rem 3rem;
                transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
                position: relative;
            }

            .protocol-card:hover {
                transform: translateY(-15px);
                box-shadow: 0 40px 80px rgba(0, 0, 0, 0.04);
            }

            .protocol-num {
                position: absolute;
                top: 2rem;
                right: 2rem;
                font-size: 0.6rem;
                letter-spacing: 0.3em;
                font-weight: 700;
                color: var(--warm-beige);
            }

            /* Animations */
            .reveal {
                opacity: 0;
                transform: translateY(30px);
                transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1);
            }

            .reveal.active {
                opacity: 1;
                transform: translateY(0);
            }

            .hex-container {
                perspective: 1000px;
                width: 260px;
                height: 300px;
                /* Perfect geometric ratio for a flat-topped hex */
                margin: 0 auto;
                cursor: pointer;
            }

            .hex-inner {
                position: relative;
                width: 100%;
                height: 100%;
                transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
                transform-style: preserve-3d;
            }

            .hex-container:hover .hex-inner,
            .hex-inner.auto-flip {
                transform: rotateY(180deg);
            }

            /* Honeycomb specific spacing fixes */
            .honeycomb-row-2 {
                margin-top: 2rem;
            }

            @media (min-width: 768px) {
                .honeycomb-row-2 {
                    /* Adjusted from -75px to -45px to add extra vertical breathing room between rows */
                    margin-top: -45px;
                }
            }

            .hex-front,
            .hex-back {
                position: absolute;
                width: 100%;
                height: 100%;
                backface-visibility: hidden;
                clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
                display: flex;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                padding: 2rem 1.75rem;
                text-align: center;
                box-sizing: border-box;
            }

            .hex-front {
                background-color: var(--charcoal);
                color: white;
            }

            .hex-back {
                background-color: var(--quartz-grey);
                color: var(--charcoal);
                transform: rotateY(180deg);
            }

            /* Form Inputs */
            .clinical-input {
                width: 100%;
                background: transparent;
                border: none;
                border-bottom: 1px solid rgba(26, 26, 26, 0.2);
                padding: 1rem 0;
                font-size: 0.75rem;
                text-transform: uppercase;
                letter-spacing: 0.1em;
                color: var(--charcoal);
                transition: border-color 0.3s ease;
            }

            .clinical-input:focus {
                outline: none;
                border-bottom-color: var(--charcoal);
            }

            /* Volume Toggle Flip Animations */
            .volume-flip-container {
                perspective: 1000px;
            }

            .volume-flip-inner {
                position: relative;
                width: 100%;
                height: 100%;
                transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
                transform-style: preserve-3d;
            }

            .volume-flip-inner.is-flipped {
                transform: rotateY(180deg);
            }

            .volume-flip-front,
            .volume-flip-back {
                position: absolute;
                top: 0;
                left: 0;
                width: 100%;
                height: 100%;
                backface-visibility: hidden;
            }

            .volume-flip-back {
                transform: rotateY(180deg);
            }

            .vol-btn {
                color: #9ca3af;
                border-bottom: 1px solid transparent;
                transition: all 0.3s ease;
            }

            .vol-btn.active {
                color: var(--charcoal);
                border-bottom-color: var(--charcoal);
            }

            /* AI Consultant Terminal */
            .ai-terminal {
                background: rgba(26, 26, 26, 0.98);
                border: 1px solid rgba(255, 255, 255, 0.1);
                height: 450px;
                display: flex;
                flex-direction: column;
                box-shadow: 0 40px 80px rgba(0, 0, 0, 0.1);
            }

            .ai-messages {
                flex-grow: 1;
                overflow-y: auto;
                padding: 2rem;
                display: flex;
                flex-direction: column;
                gap: 1.5rem;
            }

            .ai-message {
                max-width: 85%;
                font-size: 0.75rem;
                line-height: 1.8;
                letter-spacing: 0.05em;
            }

            .ai-message.user {
                align-self: flex-end;
                background: white;
                color: var(--charcoal);
                padding: 1rem 1.5rem;
            }

            .ai-message.system {
                align-self: flex-start;
                background: transparent;
                color: #a1a1aa;
                border-left: 2px solid white;
                padding-left: 1.5rem;
            }

            .ai-message.typing-cursor::after {
                content: '▋';
                display: inline-block;
                margin-left: 0.25em;
                animation: blink-caret 1s step-end infinite;
            }

            @keyframes blink-caret {

                from,
                to {
                    opacity: 1;
                }

                50% {
                    opacity: 0;
                }
            }

            /* Cart Notification Toast */
            #cart-toast {
                position: fixed;
                bottom: -100px;
                right: 40px;
                background: var(--charcoal);
                color: white;
                padding: 1.25rem 2.5rem;
                text-transform: uppercase;
                letter-spacing: 0.2em;
                font-size: 0.65rem;
                font-weight: 700;
                z-index: 1000;
                transition: bottom 0.5s cubic-bezier(0.16, 1, 0.3, 1);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
                border-left: 2px solid var(--warm-beige);
            }

            #cart-toast.show {
                bottom: 40px;
            }

            ::-webkit-scrollbar {
                width: 4px;
            }

            ::-webkit-scrollbar-thumb {
                background: var(--charcoal);
            }

            /* =========================================
   MOBILE HORIZONTAL SCROLL CAROUSELS
========================================= */
            @media (max-width: 767px) {
                .mobile-carousel {
                    display: flex !important;
                    flex-direction: row !important;
                    flex-wrap: nowrap !important;
                    overflow-x: auto;
                    overflow-y: hidden;
                    scroll-snap-type: x mandatory;
                    -webkit-overflow-scrolling: touch;
                    scroll-padding-left: 1.5rem;
                    padding-bottom: 1.5rem;
                    margin-left: -1.5rem;
                    margin-right: -1.5rem;
                    padding-left: 1.5rem;
                    padding-right: 1.5rem;
                    gap: 1.25rem !important;
                    justify-content: flex-start !important;
                    /* Forces the first card/hex to start cleanly on the left! */
                }

                /* Hide horizontal scrollbar */
                .mobile-carousel::-webkit-scrollbar {
                    display: none;
                }

                .mobile-carousel {
                    -ms-overflow-style: none;
                    scrollbar-width: none;
                }

                /* Standard Card Widths for System & Hardware */
                .mobile-carousel>* {
                    flex: 0 0 85% !important;
                    max-width: 85% !important;
                    scroll-snap-align: start;
                    /* Snaps cleanly to the left edge of each card */
                }

                /* Hexagon Review Widths on Mobile */
                .mobile-carousel>.hex-container {
                    flex: 0 0 260px !important;
                    max-width: 260px !important;
                    scroll-snap-align: center;
                }

                /* Subtle entrance pulse animation exclusively for 'The System' cards on mobile */
                #system .mobile-carousel>* {
                    transition: transform 0.4s ease, opacity 0.4s ease;
                }

                #system .mobile-carousel>*:active {
                    transform: scale(0.98);
                }

                /* Slightly adjust Hexagon review width for optimal mobile swiping */
                .mobile-carousel>.hex-container {
                    flex: 0 0 260px !important;
                    max-width: 260px !important;
                }

                /* Reset the honeycomb negative top-margin when swiping horizontally on mobile */
                .mobile-carousel.honeycomb-row-2 {
                    margin-top: 0 !important;
                }
            }
            /* =========================================
   TRANSMISSION MODAL ANIMATIONS
========================================= */
@keyframes scan {
    0% { transform: translateY(-10px); opacity: 1; }
    100% { transform: translateY(400px); opacity: 0; }
}

.animate-scan {
    animation: scan 2.5s linear infinite;
}

.envelope-container.success .envelope-icon {
    opacity: 0;
    transform: scale(0.3) translateY(-20px);
}

.envelope-container.success .check-icon {
    opacity: 1;
    transform: scale(1) translateY(0);
    transition-delay: 200ms; /* Waits for envelope to shrink before appearing */
}