:root {
    /* Fluid root font-size: scales from 14px (0.875rem) to 18px (1.125rem) */
    font-size: clamp(0.875rem, 0.7rem + 0.5vw, 1.125rem);

    /* Base Global Architecture */
    --bi-bg: #f2f2f2;
    --bi-text: #121212;
    --bi-divider: rgba(18, 18, 18, 0.1);

    /* Dynamic System Tokens (Default: Neo-Classical Light) */
    --sys-bg-main: #f2f2f2;
    --sys-text-primary: #121212;
    --sys-text-secondary: rgba(18, 18, 18, 0.6);
    --sys-border: rgba(18, 18, 18, 0.1);

    --sys-font-primary: 'Inter', sans-serif;
    --sys-font-display: 'Inter', sans-serif;

    --sys-accent-shadow: none;
    --sys-button-radius: 50px;
    --sys-button-bg-hover: #121212;
    --sys-button-text-hover: #f2f2f2;

    /* Transitions */
    --transition-standard: 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* Dark Mode Toggle Base Variables override */
body.dark-mode {
    --sys-bg-main: #121212;
    --sys-text-primary: #f2f2f2;
    --sys-text-secondary: rgba(242, 242, 242, 0.4);
    --sys-border: rgba(242, 242, 242, 0.1);
    --sys-button-bg-hover: #f2f2f2;
    --sys-button-text-hover: #121212;

    /* THE SELECTION section */
    --bi-bg: #1a1a1a;
    --bi-text: #f2f2f2;
    --bi-divider: rgba(242, 242, 242, 0.1);
    --bi-header-bg: #111111;
}

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

html,
body {
    width: 100%;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    position: relative;
    /* Prevent iOS rubber-banding from showing weird white gutters */
    background-color: var(--sys-bg-main);
}

body {
    font-family: var(--sys-font-primary);
    color: var(--sys-text-primary);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition-standard), color var(--transition-standard);
}

/* 2-Panel Hero Layout */
.neo-hero {
    position: relative;
    height: 100vh;
    overflow: hidden;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.theme-toggle {
    position: absolute;
    top: 2.5rem;
    right: 2.5rem;
    z-index: 100;
    background: none;
    border: 1px solid var(--sys-border);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-standard);
}

.theme-toggle:hover {
    background: var(--sys-text-primary);
}

.toggle-icon {
    width: 0.75rem;
    height: 0.75rem;
    background: var(--sys-text-primary);
    border-radius: 50%;
    transition: var(--transition-standard);
}

.theme-toggle:hover .toggle-icon {
    background: var(--sys-bg-main);
}

.hero-main-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    height: 100%;
}

.hero-section {
    min-height: 100vh;
    height: auto;
    width: 100vw;
    position: relative;
    border-bottom: 1px solid var(--sys-border);
}

.neo-panels {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    height: 100%;
    position: relative;
    z-index: 10;
}

.panel {
    height: 100%;
    padding: clamp(2rem, 5vh, 3.75rem) clamp(1.25rem, 5vw, 2.5rem);
    border-right: 1px solid var(--sys-border);
    display: flex;
    flex-direction: column;
}

.panel:last-child {
    border-right: none;
}

/* Mega Headings Alignment - BOTTOM LEFT */
.panel-main {
    justify-content: flex-end;
    align-items: flex-start;
}

.mega-headings {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.mega-headings h1 {
    font-family: var(--sys-font-display);
    font-size: clamp(3rem, 12vw, 5.625rem);
    font-weight: 900;
    line-height: 1;
    letter-spacing: -0.04em;
    display: block;
    text-transform: uppercase;
    color: var(--sys-text-primary);
    text-shadow: var(--sys-accent-shadow);
    white-space: nowrap;
    margin-left: 0;
    transition: color var(--transition-standard), text-shadow var(--transition-standard);
}

.sub-headings {
    margin-top: 1.25rem;
}

.sub-headings h2 {
    font-size: clamp(1.125rem, 2.5vw, 2rem);
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.03em;
    color: var(--sys-text-secondary);
}

/* Panel Elements */
.info-blocks-group {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.info-block .label {
    font-size: clamp(0.55rem, 0.5rem + 0.2vw, 0.7rem);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--sys-text-secondary);
    margin-bottom: 0.75rem;
}

.info-block .content {
    font-size: 1rem;
    line-height: 1.4;
    font-weight: 400;
}

.info-block .secondary-content {
    margin-top: 0.25rem;
}

.info-block .content a {
    color: var(--sys-text-primary);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: border-color 0.3s;
}

.info-block .content a:hover {
    border-color: var(--sys-text-primary);
}

.neo-nav {
    margin-top: auto;
    padding-top: 3.75rem;
    padding-bottom: 1.25rem;
}

.neo-nav li {
    margin-bottom: 0.5rem;
    list-style: none;
}

.neo-nav a {
    font-size: clamp(1.125rem, 1rem + 0.5vw, 1.5rem);
    font-weight: 700;
    color: var(--sys-text-primary);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    transition: opacity 0.3s;
}

.neo-nav a:hover {
    opacity: 0.4;
}

.spline-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.3;
}

/* STOREFRONT */
.gallery-section {
    background-color: var(--bi-bg, var(--sys-bg-main));
    color: var(--bi-text, var(--sys-text-primary));
    padding: 0 2.5rem;
    padding-bottom: 7.5rem;
    min-height: 100vh;
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    container-type: inline-size;
    transition: background-color var(--transition-standard), color var(--transition-standard);
}

.store-header-container {
    padding-top: clamp(2rem, 8vh, 3.75rem);
    padding-bottom: clamp(2rem, 8vh, 3.75rem);
    margin-bottom: clamp(3rem, 10vh, 5rem);
    border-bottom: 1px solid var(--bi-divider);
}

.store-category-label {
    font-size: clamp(0.625rem, 0.5rem + 0.3vw, 0.875rem);
    font-family: var(--sys-font-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--bi-text);
    margin-bottom: 0.9375rem;
}

.store-title {
    font-family: var(--sys-font-display);
    font-size: clamp(2.25rem, 8vw, 6.5625rem);
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 0.9;
    text-transform: uppercase;
}

.store-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18.75rem), 1fr));
    justify-items: center;
    column-gap: 2.5rem;
    row-gap: 3.125rem;
    width: 100%;
}

/* Container query for storefront grid */
@container (max-width: 640px) {
    .store-grid {
        grid-template-columns: 1fr;
        row-gap: 1.875rem;
    }
}

/* Responsive Enhancements */
@media (max-width: 850px) {
    .neo-panels {
        grid-template-columns: 1fr;
        height: auto;
        padding-top: 3.75rem;
    }

    .panel {
        border-right: none;
        height: auto;
        padding: clamp(1.5rem, 8vw, 2.5rem) clamp(1rem, 5vw, 1.5rem);
        min-height: auto;
    }

    .panel:last-child {
        border-bottom: none;
    }

    .panel-main {
        justify-content: flex-start;
        align-items: center;
        text-align: center;
    }

    .mega-headings {
        align-items: center;
    }

    .mega-headings h1 {
        white-space: normal;
        text-align: center;
        font-size: clamp(2.5rem, 12vw, 4rem);
        line-height: 0.9;
    }

    .info-block .label {
        font-size: 1.625rem;
    }

    .info-block .content {
        font-size: 1.825rem;
    }

    .neo-nav a {
        font-size: 2.025rem;
    }

    .store-header-container {
        padding-top: clamp(1.25rem, 6vw, 2.5rem);
        padding-bottom: clamp(1.25rem, 6vw, 2.5rem);
        margin-bottom: clamp(1.5rem, 8vw, 3rem);
    }
}

@media (max-width: 600px) {
    .panel {
        padding: 2.5rem 1.25rem;
    }

    .mega-headings h1 {
        font-size: clamp(2rem, 15vw, 3.5rem);
    }

    .info-block .label {
        font-size: 1.75rem;
    }

    .info-block .content {
        font-size: 1.925rem;
    }

    .gallery-section {
        padding: 0 1.25rem;
        padding-bottom: 3.75rem;
    }

    .store-title {
        font-size: clamp(1.75rem, 10vw, 2.625rem);
    }

    .theme-toggle {
        top: 1.25rem;
        right: 1.25rem;
        width: 2.25rem;
        height: 2.25rem;
    }
}