/* ============================================
   TENNINK - ELECTRONIC YELLOW DESIGN
   ============================================ */

:root {
    /* Primary Colors - Bold & Electric */
    --yellow-primary: #FFED00;
    --yellow-dark: #D4AF00;
    --yellow-light: #FFFB4D;
    --black-primary: #0a0a0a;
    --black-light: #1a1a1a;
    --black-lighter: #2a2a2a;
    --white-primary: #ffffff;
    --gray-text: #404040;
    --gray-border: #e0e0e0;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;

    /* Shared Layout Heights */
    --navbar-height-desktop: 76px;
    --navbar-height-mobile: 81px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
    background-color: var(--black-primary);
}

body {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size-adjust: 0.54;
    background-color: var(--white-primary);
    color: var(--black-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY & UTILITIES
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.1;
}

h1 {
    font-size: clamp(32px, 8vw, 72px);
}

h2 {
    font-size: clamp(28px, 6vw, 52px);
}

h3 {
    font-size: 18px;
    font-weight: 700;
}

p {
    font-size: 17px;
    line-height: 1.7;
    color: var(--gray-text);
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.accent {
    color: var(--yellow-primary);
    display: inline-block;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-icon {
    font-size: 11px;
}

.btn-primary {
    background-color: var(--yellow-primary);
    color: var(--black-primary);
    box-shadow: 0 8px 0 var(--black-primary);
    border: 2px solid var(--black-primary);
    font-weight: 800;
}

.btn-primary:hover {
    background-color: var(--yellow-primary);
    color: var(--black-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 0 var(--black-primary);
    border-color: var(--black-primary);
}

.btn-primary:active {
    transform: translateY(4px);
    box-shadow: 0 4px 0 var(--black-primary);
}

.btn-secondary {
    background-color: transparent;
    color: var(--black-primary);
    border: 2px solid var(--black-primary);
}

.btn-secondary:hover {
    background-color: var(--black-primary);
    color: var(--yellow-primary);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.btn.is-loading,
.btn:disabled {
    opacity: 0.75;
    cursor: progress;
}

.site-status {
    position: fixed;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1300;
    width: min(92vw, 760px);
    padding: 10px 14px;
    border: 2px solid var(--black-primary);
    border-radius: var(--radius-md);
    background: var(--white-primary);
    color: var(--black-primary);
    font-weight: 700;
    text-align: center;
    box-shadow: 0 6px 0 var(--black-primary);
}

.site-status--error {
    background: var(--yellow-light);
}

.site-status--success {
    background: var(--yellow-primary);
}

body.site-is-loading {
    cursor: progress;
}

[data-include-src] {
    display: block;
}

[data-include-src$='navbar.html'] {
    height: var(--navbar-height-desktop);
    background: var(--black-primary);
}

[data-include-src$='footer.html'] {
    height: 160px;
    background: var(--black-primary);
}

@media (max-width: 768px) {
    [data-include-src$='navbar.html'] {
        height: 81px;
    }

    [data-include-src$='footer.html'] {
        height: 180px;
    }
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--navbar-height-desktop);
    background-color: var(--black-primary);
    display: flex;
    align-items: center;
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    width: 100%;
    padding: 0 clamp(var(--spacing-sm), 4vw, var(--spacing-lg));
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--yellow-primary);
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.logo-bracket {
    color: var(--yellow-primary);
    opacity: 0.6;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-cart-mobile {
    display: none;
    align-items: center;
    font-size: 17px;
    font-weight: 700;
    color: var(--yellow-primary);
    border: 2px solid var(--yellow-primary);
    border-radius: var(--radius-md);
    background: var(--black-primary);
    padding: 8px 10px;
    line-height: 1;
}

.nav-cart-mobile .cart-count-badge {
    margin-left: 6px;
}

.nav-menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 2px solid var(--yellow-primary);
    border-radius: var(--radius-md);
    background: var(--black-primary);
    color: var(--yellow-primary);
    font-size: 22px;
    font-weight: 800;
    line-height: 1;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-family: inherit;
}

.nav-link {
    font-size: 17px;
    font-weight: 600;
    color: var(--yellow-primary);
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--yellow-primary);
    transition: var(--transition);
}

.nav-link:hover::after {
    width: 100%;
}

a,
button,
.btn,
.nav-link,
.nav-menu-btn {
    -webkit-tap-highlight-color: rgba(255, 237, 0, 0.28);
}

@media (max-width: 768px) {
    .nav-container {
        position: relative;
    }

    .nav-menu-btn {
        display: inline-flex;
    }

    .nav-cart-mobile {
        display: inline-flex;
    }

    .nav-links {
        position: absolute;
        top: calc(100% + 10px);
        right: 0;
        left: 0;
        display: flex;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--black-primary);
        border: 3px solid var(--yellow-primary);
        border-radius: var(--radius-lg);
        padding: 8px;
        box-shadow: 0 10px 0 var(--black-primary);
        opacity: 0;
        transform: translateY(-10px) scale(0.98);
        transform-origin: top center;
        pointer-events: none;
        visibility: hidden;
        transition: none;
    }

    .navbar.nav-open .nav-links {
        opacity: 1;
        transform: translateY(0) scale(1);
        pointer-events: auto;
        visibility: visible;
        transition: opacity 0.22s ease, transform 0.22s ease;
    }

    .navbar.nav-closing .nav-links {
        opacity: 0;
        transform: translateY(-10px) scale(0.98);
        pointer-events: none;
        visibility: hidden;
        transition: opacity 0.22s ease, transform 0.22s ease;
    }

    .nav-link {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 8px;
        border-radius: var(--radius-sm);
    }

    .nav-links .nav-link.nav-persist {
        display: none;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link:hover {
        background: var(--black-lighter);
        color: var(--yellow-primary);
    }

    .nav-links .btn {
        display: none;
    }
}

.cart-count-badge {
    min-width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--yellow-primary);
    color: var(--black-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 800;
    line-height: 1;
    margin-left: 6px;
    padding: 0 6px;
    border: 2px solid var(--yellow-primary);
    transition: transform 0.2s ease;
}

.cart-count-badge.is-empty {
    opacity: 0.7;
}

.cart-count-badge.bump {
    animation: cartBadgeBump 0.35s ease;
}

.nav-link.cart-link-bump {
    animation: cartLinkBump 0.4s ease;
}

@keyframes cartLinkBump {
    0% { transform: translateY(0); }
    40% { transform: translateY(-2px) scale(1.03); }
    100% { transform: translateY(0); }
}

@keyframes cartBadgeBump {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.btn.added-to-cart {
    animation: addedToCartFlash 0.45s ease;
}

@keyframes addedToCartFlash {
    0% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
    100% { transform: translateY(0); }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    background: var(--yellow-primary);
    padding: var(--spacing-lg) var(--spacing-sm) var(--spacing-xl);
    border-bottom: 4px solid var(--black-primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: none;
    border-radius: 50%;
}

.hero-content {
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 0 var(--black-primary);
    padding: clamp(20px, 4vw, 48px);
    position: relative;
    z-index: 1;
}

.hero-tag {
    font-size: 14px;
    font-weight: 700;
    color: var(--black-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.8;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    color: var(--black-primary);
}

.hero-subtitle {
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
    color: var(--gray-text);
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.phone-showcase {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
}

.phone-img {
    width: 100%;
    max-width: none;
    height: 100%;
    display: block;
    border-radius: 34px;
    border: 8px solid var(--black-primary);
    box-shadow: none;
    object-fit: cover;
    object-position: center top;
    aspect-ratio: 9 / 19.2;
    background: var(--gray-border);
}

@media (max-width: 768px) {
    .hero {
        padding: var(--spacing-md) var(--spacing-sm) var(--spacing-lg);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding: var(--spacing-md);
        box-shadow: 0 6px 0 var(--black-primary);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}

/* ============================================
   SECTION STYLES
   ============================================ */

section {
    padding: var(--spacing-xl) var(--spacing-sm);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
    color: var(--black-primary);
}

.section-header p {
    font-size: 15px;
    max-width: 500px;
    margin: 0 auto;
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    background-color: var(--white-primary);
    border-top: 4px solid var(--black-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.feature-box {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--yellow-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.feature-box::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(600px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 237, 0, 0.08) 0%, transparent 80%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.feature-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 0 var(--black-primary);
}

.feature-box:hover::before {
    transform: scaleX(1);
}

.feature-box:hover::after {
    opacity: 1;
}

.feature-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon .material-symbols-rounded {
    font-size: 48px;
    color: var(--black-primary);
    font-variation-settings: 'FILL' 0, 'wght' 600, 'GRAD' 0, 'opsz' 48;
}

.feature-box h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--black-primary);
}

.feature-box p {
    color: var(--gray-text);
    font-size: 16px;
}

/* ============================================
   HOW IT WORKS SECTION
   ============================================ */

.how-it-works {
    background-color: var(--white-primary);
    color: var(--black-primary);
}

.how-it-works .section-header h2 {
    color: var(--black-primary);
}

.how-it-works .section-header p {
    color: var(--black-primary);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.step-item {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    box-shadow: 0 10px 0 var(--black-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    position: relative;
    transition: var(--transition);
    overflow: hidden;
}

.step-item::before {
    content: none;
    position: absolute;
    inset: 0;
    background: none;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.step-item:hover::before {
    opacity: 1;
}

.step-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 0 var(--black-primary);
}

.step-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--black-primary);
    margin-bottom: var(--spacing-md);
    opacity: 1;
}

.step-item h3 {
    color: var(--black-primary);
    margin-bottom: var(--spacing-sm);
}

.step-item p {
    color: var(--black-primary);
    font-size: 16px;
}

/* ============================================
   BUILT FOR SECTION
   ============================================ */

.built-for {
    background-color: var(--white-primary);
    border-bottom: 4px solid var(--black-primary);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.audience-box {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94), border-color 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.audience-box::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--yellow-primary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 0;
}

.audience-box > * {
    position: relative;
    z-index: 1;
}

.audience-box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 0 var(--black-primary);
}

.audience-box:hover::after {
    transform: scaleY(1);
}

.audience-box:hover h3,
.audience-box:hover p {
    color: var(--black-primary);
}

.audience-box:hover .audience-icon {
    color: var(--black-primary);
}

.audience-emoji {
    font-size: 48px;
    display: block;
    margin-bottom: var(--spacing-md);
}

.audience-icon {
    font-size: 48px;
    display: block;
    margin-bottom: var(--spacing-md);
    color: var(--black-primary);
    font-variation-settings: 'FILL' 0, 'wght' 600, 'GRAD' 0, 'opsz' 48;
}

.audience-box h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--black-primary);
}

.audience-box p {
    font-size: 16px;
    color: var(--gray-text);
}

/* ============================================
   FINAL CTA SECTION
   ============================================ */

.final-cta {
    background: linear-gradient(135deg, var(--yellow-primary) 0%, var(--yellow-light) 100%);
    border-top: 4px solid var(--black-primary);
    border-bottom: 4px solid var(--black-primary);
    padding: var(--spacing-xl) var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.cta-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.final-cta h2 {
    color: var(--black-primary);
    margin-bottom: var(--spacing-md);
}

.final-cta p {
    color: var(--black-primary);
    font-size: 18px;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    background-color: var(--black-primary);
    color: var(--white-primary);
    padding: var(--spacing-lg) var(--spacing-sm);
    border-top: none;
    text-align: center;
}

footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--yellow-primary);
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--yellow-primary);
    transition: var(--transition);
}

.footer-links a:hover::after {
    width: 100%;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
}

.reveal.is-visible {
    animation: fadeUp 0.6s ease-out forwards;
    animation-delay: var(--reveal-delay, 0s);
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        transform: none;
        opacity: 1;
    }

    .reveal.is-visible {
        animation: none;
    }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 32px;
        --spacing-xl: 48px;
    }
    
    h1 {
        font-size: 32px;
    }
    
    h2 {
        font-size: 24px;
    }
    
    .hero {
        padding: var(--spacing-md) var(--spacing-sm) var(--spacing-lg);
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .phone-img {
        max-width: none;
    }
    
    .cta-buttons {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .btn {
        width: 100%;
    }
    
    .features-grid,
    .steps-container,
    .audience-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    h1 {
        height: var(--navbar-height-mobile);
    }

    .navbar {
        height: var(--navbar-height-mobile);
    }
    
    h2 {
        font-size: 20px;
    }
    
    .btn {
        padding: 12px 16px;
        font-size: 13px;
    }
    
    .btn-large {
        padding: 14px 20px;
    }
}

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

.text-black { color: var(--black-primary); }
.bg-yellow { background-color: var(--yellow-primary); }
.bg-black { background-color: var(--black-primary); }

/* ============================================
   CAROUSEL STYLING
   ============================================ */

.carousel-container {
    position: relative;
    width: 100%;
    max-width: clamp(280px, 30vw, 380px);
    margin: 0 auto;
    padding: 12px 64px 0;
}

.carousel {
    position: relative;
    width: 100%;
    aspect-ratio: 9 / 19.2;
    overflow: hidden;
    border-radius: 34px;
    box-shadow: none;
}

.carousel-track {
    display: flex;
    width: 100%;
    transition: transform 0.45s ease;
    will-change: transform;
}

.carousel-nav {
    --nav-center-y: -50%;
    width: 48px;
    min-width: 48px;
    height: 48px;
    padding: 0;
    gap: 0;
    font-size: 30px;
    line-height: 1;
    letter-spacing: 0;
    text-transform: none;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 50%;
    transform: translateY(var(--nav-center-y));
    z-index: 20;
}

.carousel-nav.btn-primary:hover {
    transform: translateY(calc(var(--nav-center-y) - 4px));
    box-shadow: 0 10px 0 var(--black-primary);
}

.carousel-nav.btn-primary:active {
    transform: translateY(calc(var(--nav-center-y) + 4px));
    box-shadow: 0 4px 0 var(--black-primary);
}

.carousel-prev { left: 0; }
.carousel-next { right: 0; }

.carousel-slide {
    min-width: 100%;
    width: 100%;
    flex: 0 0 100%;
    display: flex;
}

.carousel,
.carousel-track,
.carousel-slide,
.carousel-dots {
    pointer-events: none;
}

.carousel-slide .phone-img {
    pointer-events: auto;
    cursor: zoom-in;
}

.carousel-dots {
    position: relative;
    margin-top: 18px;
    display: flex;
    gap: 8px;
    justify-content: center;
    z-index: 10;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    min-width: 10px;
    min-height: 10px;
    border-radius: 50%;
    background: rgba(10, 10, 10, 0.2);
    border: 2px solid var(--black-primary);
    transition: background-color 0.2s ease;
}

.carousel-dot.active {
    background: var(--black-primary);
}

@media (min-width: 769px) {
    .carousel-container {
        max-width: clamp(320px, 36vw, 460px);
    }

    .carousel {
        aspect-ratio: 9 / 19.5;
    }

    .phone-img {
        object-position: center top;
    }
}

@media (max-width: 768px) {
    .carousel-container {
        padding: 8px 50px 0;
    }

    .carousel-nav {
        width: 42px;
        min-width: 42px;
        height: 42px;
        font-size: 26px;
    }
}

.carousel-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.85);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px 24px 96px;
    z-index: 3000;
}

.carousel-lightbox.is-open {
    display: flex;
}

.carousel-lightbox-img {
    max-width: min(90vw, 560px);
    max-height: 90vh;
    width: auto;
    height: auto;
    border: 4px solid var(--black-primary);
    border-radius: 24px;
    background: var(--white-primary);
}

.carousel-lightbox-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: 2px solid var(--black-primary);
    background: var(--yellow-primary);
    color: var(--black-primary);
    font-size: 24px;
    font-weight: 800;
    cursor: pointer;
    line-height: 1;
}

.carousel-lightbox-nav {
    --lightbox-nav-y: 0px;
    position: absolute;
    bottom: 20px;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 2px solid var(--black-primary);
    background: var(--yellow-primary);
    color: var(--black-primary);
    font-size: 30px;
    font-weight: 800;
    line-height: 1;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 0 var(--black-primary);
    transform: translateY(var(--lightbox-nav-y));
    transition: var(--transition);
}

.carousel-lightbox-nav:hover {
    transform: translateY(calc(var(--lightbox-nav-y) - 4px));
    box-shadow: 0 12px 0 var(--black-primary);
}

.carousel-lightbox-nav:active {
    transform: translateY(calc(var(--lightbox-nav-y) + 4px));
    box-shadow: 0 4px 0 var(--black-primary);
}

.carousel-lightbox-prev {
    left: calc(50% - 64px);
}

.carousel-lightbox-next {
    left: calc(50% + 16px);
}

@media (min-width: 769px) {
    .carousel-lightbox {
        padding: 24px;
    }

    .carousel-lightbox-nav {
        bottom: auto;
        top: 50%;
        --lightbox-nav-y: -50%;
    }

    .carousel-lightbox-prev {
        left: max(16px, calc(50% - 360px));
    }

    .carousel-lightbox-next {
        left: auto;
        right: max(16px, calc(50% - 360px));
    }
}

body.lightbox-open {
    overflow: hidden;
}

/* ============================================
   PAGE STYLING
   ============================================ */

.page-shell {
    max-width: 1100px;
    margin: 0 auto;
    padding: 48px 5% 80px;
}

.page-title {
    margin-bottom: 14px;
    color: var(--black-primary);
}

.page-subtitle {
    max-width: 680px;
    margin-bottom: 36px;
    color: var(--gray-text);
}

.shop-grid, .support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 42px;
}

.shop-card, .support-card, .policy-card {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.shop-card::before, .support-card::before, .policy-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(600px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 237, 0, 0.08) 0%, transparent 80%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.shop-card:hover, .support-card:hover, .policy-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 0 var(--black-primary);
}

.shop-card:hover::before, .support-card:hover::before, .policy-card:hover::before {
    opacity: 1;
}

.shop-card h3, .support-card h3, .policy-card h2 {
    margin-bottom: 12px;
    color: var(--black-primary);
}

.price {
    font-size: 34px;
    font-weight: 800;
    margin: 10px 0 16px;
    color: var(--black-primary);
}

.price small {
    font-size: 16px;
    color: var(--gray-text);
    font-weight: 500;
}

.feature-list, .support-card ol {
    margin-bottom: 24px;
    padding-left: 0;
    list-style: none;
}

.feature-list li, .support-card li {
    color: var(--gray-text);
    margin-bottom: 10px;
    padding-left: 20px;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--yellow-primary);
    font-weight: 800;
}

.support-card ol {
    padding-left: 18px;
}

.support-card li {
    padding-left: 0;
}

.support-card li::before {
    display: none;
}

.specs {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 30px;
}

.spec-row {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 20px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-border);
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row strong {
    color: var(--black-primary);
    font-weight: 700;
}

.spec-row span {
    color: var(--gray-text);
}

.note, .contact {
    background: var(--yellow-light);
    border: 2px solid var(--black-primary);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    color: var(--black-primary);
    font-weight: 600;
}

.note a, .contact a {
    color: var(--black-primary);
    text-decoration: underline;
    font-weight: 700;
}

.terms-block {
    background: var(--white-primary);
    border: 3px solid var(--black-primary);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.terms-block::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(600px at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 237, 0, 0.08) 0%, transparent 80%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.terms-block:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 0 var(--black-primary);
}

.terms-block:hover::before {
    opacity: 1;
}

.terms-block h2 {
    margin-bottom: 8px;
    color: var(--black-primary);
}

.terms-block p {
    color: var(--gray-text);
}

.policy-card h2 {
    margin-bottom: 10px;
    font-size: 22px;
}

.policy-card ul {
    padding-left: 18px;
}

.policy-card li {
    margin-bottom: 8px;
    padding-left: 0;
    color: var(--gray-text);
}

/* ============================================
   INTERACTIVE SCOREBOARD DEMO
   ============================================ */

.scoreboard-demo {
    background-color: var(--white-primary);
}

/* Device Housing */
.sb-device {
    max-width: 480px;
    margin: 0 auto;
    background: #b8b8b8;
    border: 3px solid var(--black-primary);
    border-radius: 32px;
    padding: 24px 20px 20px;
    box-shadow: 0 10px 0 var(--black-primary);
    user-select: none;
}

/* ---- Center Display (Landscape) ---- */

.sb-center {
    border: 2px solid #1a1a1a;
    border-radius: 8px;
    overflow: hidden;
    margin: 0 40px 16px;
}

.sb-center-main {
    display: flex;
}

.sb-center-half {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 8px 10px;
    transition: background-color 0.35s ease, color 0.35s ease;
}

.sb-center-left {
    background: #fff;
    color: #000;
    border-right: 2px solid #1a1a1a;
}

.sb-center-right {
    background: #000;
    color: #fff;
}

.sb-flipped .sb-center-left {
    background: #000;
    color: #fff;
}

.sb-flipped .sb-center-right {
    background: #fff;
    color: #000;
}

.sb-set-value {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    font-size: clamp(52px, 16vw, 80px);
    font-weight: 900;
    line-height: 1;
}

.sb-set-label {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    font-size: clamp(11px, 2.5vw, 15px);
    font-weight: 700;
    letter-spacing: 3px;
    margin-top: 8px;
}

.sb-center-bar {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px;
    font-size: clamp(11px, 2.5vw, 14px);
    font-weight: 700;
    border-top: 2px solid #1a1a1a;
    transition: background-color 0.35s ease, color 0.35s ease;
    background: #fff;
    color: #000;
    gap: 8px;
}

.sb-flipped .sb-center-bar {
    background: #000;
    color: #fff;
}

.sb-icons {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sb-icons .material-symbols-rounded {
    font-size: clamp(14px, 3vw, 18px);
    font-variation-settings: 'FILL' 1, 'wght' 600, 'GRAD' 0, 'opsz' 20;
}

/* ---- Side Panels ---- */

.sb-sides {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 0 0 20px;
}

.sb-side {
    border: 2px solid #1a1a1a;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 8px;
    aspect-ratio: 3 / 5;
    transition: background-color 0.35s ease, color 0.35s ease;
}

.sb-side-left {
    background: #fff;
    color: #000;
}

.sb-side-right {
    background: #000;
    color: #fff;
}

.sb-flipped .sb-side-left {
    background: #000;
    color: #fff;
}

.sb-flipped .sb-side-right {
    background: #fff;
    color: #000;
}

.sb-player-name {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    font-size: clamp(13px, 3.5vw, 18px);
    font-weight: 700;
    letter-spacing: 0.5px;
}

.sb-game-value {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    font-size: clamp(64px, 24vw, 140px);
    font-weight: 900;
    line-height: 1;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sb-point-value {
    font-family: 'Roboto Condensed', 'Arial Narrow', sans-serif;
    font-size: clamp(13px, 3.5vw, 18px);
    font-weight: 700;
    min-height: 20px;
    transition: opacity 0.3s ease;
}

.sb-point-value.sb-hidden {
    opacity: 0;
}

/* ---- Controls / Buttons ---- */

.sb-controls {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 10px;
    padding-top: 4px;
}

.sb-btn-pair,
.sb-btn-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.sb-btn-center {
    margin: 0 4px;
}

.sb-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid #333;
    background: #8a8a8a;
    color: #222;
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    padding: 0;
    line-height: 1;
    box-shadow: 0 2px 0 rgba(0,0,0,0.4);
    transition: transform 0.1s, box-shadow 0.1s, background-color 0.15s;
    -webkit-tap-highlight-color: transparent;
}

.sb-btn:hover {
    background: #9a9a9a;
}

.sb-btn:active {
    transform: translateY(2px);
    box-shadow: 0 0 0 rgba(0,0,0,0.4);
    background: #777;
}

.sb-btn .material-symbols-rounded {
    font-size: 18px;
    font-variation-settings: 'FILL' 0, 'wght' 600, 'GRAD' 0, 'opsz' 20;
}

.sb-btn.sb-ble-on {
    background: var(--yellow-primary);
    border-color: var(--black-primary);
}

/* ---- Scoreboard Responsive ---- */

@media (max-width: 480px) {
    .sb-device {
        border-radius: 24px;
        padding: 16px 12px 14px;
    }

    .sb-center {
        margin: 0 16px 12px;
    }

    .sb-center-half {
        padding: 14px 6px 6px;
    }

    .sb-sides {
        gap: 8px;
        margin-bottom: 14px;
    }

    .sb-controls {
        gap: 6px;
    }

    .sb-btn {
        width: 30px;
        height: 30px;
        font-size: 10px;
    }

    .sb-btn .material-symbols-rounded {
        font-size: 15px;
    }
}