:root {
            --color-primary: #1a5c3a;
            --color-primary-dark: #0f3d26;
            --color-primary-light: #2d7a4f;
            --color-accent: #c9a227;
            --color-accent-light: #e6c555;
            --color-accent-dark: #a68419;
            --color-success: #34a853;
            --color-bg: #faf9f6;
            --color-bg-alt: #f0efe9;
            --color-surface: #ffffff;
            --color-text: #1f2937;
            --color-text-muted: #6b7280;
            --color-text-light: #9ca3af;
            --color-border: #e5e7eb;
            --color-border-light: #f3f4f6;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --font-heading: 'Georgia', 'Times New Roman', serif;
            --line-height: 1.7;
            --line-height-heading: 1.25;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2rem;
            --spacing-xl: 3rem;
            --spacing-2xl: 4rem;
            --max-width: 830px;
            --max-width-wide: 1200px;
            --transition-fast: 150ms ease;
            --transition-base: 250ms ease;
            --transition-slow: 350ms ease;
        
    /* --- AUTO-FORCED DARK THEME --- */
    --color-primary: #3d9960;
                --color-primary-dark: #2d7a4f;
                --color-primary-light: #4db876;
                --color-accent: #e6c555;
                --color-accent-light: #f0d77a;
                --color-accent-dark: #c9a227;
                --color-bg: #0f1419;
                --color-bg-alt: #1a2028;
                --color-surface: #1f2937;
                --color-text: #f3f4f6;
                --color-text-muted: #9ca3af;
                --color-text-light: #6b7280;
                --color-border: #374151;
                --color-border-light: #2d3748;
                --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
                --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
                --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
                --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
}

        

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-body);
            font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
            line-height: var(--line-height);
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
            border-bottom: 3px solid var(--color-accent);
            box-shadow: var(--shadow-md);
        }

        main {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: var(--spacing-lg) var(--spacing-md);
            background: var(--color-surface);
            min-height: 100vh;
        }

        @media (min-width: 768px) {
            main {
                padding: var(--spacing-2xl) var(--spacing-xl);
                margin-top: var(--spacing-lg);
                margin-bottom: var(--spacing-lg);
                border-radius: var(--radius-xl);
                box-shadow: var(--shadow-xl);
            }
        }

        footer {
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
            border-top: 3px solid var(--color-accent);
            padding: var(--spacing-xl) var(--spacing-md);
            margin-top: auto;
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            line-height: var(--line-height-heading);
            color: var(--color-text);
            font-weight: 700;
        }

        h1 {
            font-size: clamp(1.875rem, 1.5rem + 1.875vw, 2.75rem);
            margin-bottom: var(--spacing-md);
            color: var(--color-primary-dark);
            position: relative;
            padding-bottom: var(--spacing-md);
        }

        h1::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
            border-radius: var(--radius-sm);
        }

        h2 {
            font-size: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
            margin-top: var(--spacing-2xl);
            margin-bottom: var(--spacing-md);
            color: var(--color-primary);
            padding-left: var(--spacing-md);
            border-left: 4px solid var(--color-accent);
        }

        h3 {
            font-size: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
            margin-top: var(--spacing-xl);
            margin-bottom: var(--spacing-sm);
            color: var(--color-primary-light);
        }

        p {
            margin-bottom: var(--spacing-md);
            text-align: justify;
            hyphens: auto;
        }

        p:last-child {
            margin-bottom: 0;
        }

        strong {
            font-weight: 600;
            color: var(--color-primary-dark);
        }

        @media (prefers-color-scheme: dark) {
            strong {
                color: var(--color-primary-light);
            }
        }

        em {
            font-style: italic;
            color: var(--color-text-muted);
        }

        /* Links */
        a {
            color: var(--color-primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
        }

        a:hover {
            color: var(--color-accent-dark);
            text-decoration-color: var(--color-primary);
        }

        a:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* Lists */
        ul, ol {
            margin-bottom: var(--spacing-md);
            padding-left: var(--spacing-lg);
        }

        li {
            margin-bottom: var(--spacing-xs);
            padding-left: var(--spacing-xs);
        }

        ol {
            counter-reset: item;
            list-style: none;
            padding-left: 0;
        }

        ol li {
            counter-increment: item;
            position: relative;
            padding-left: var(--spacing-xl);
            margin-bottom: var(--spacing-sm);
        }

        ol li::before {
            content: counter(item);
            position: absolute;
            left: 0;
            top: 0;
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: white;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Blockquote */
        blockquote {
            margin: var(--spacing-xl) 0;
            padding: var(--spacing-md) var(--spacing-lg);
            background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-surface) 100%);
            border-left: 4px solid var(--color-accent);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--color-text-muted);
            position: relative;
        }

        blockquote::before {
            content: '\201C';
            position: absolute;
            top: -10px;
            left: 15px;
            font-size: 4rem;
            font-family: var(--font-heading);
            color: var(--color-accent);
            opacity: 0.3;
            line-height: 1;
        }

        blockquote p {
            margin-bottom: 0;
            text-align: left;
        }

        /* Images */
        figure {
            margin: var(--spacing-xl) 0;
        }

        .hero-image {
            width: calc(100% + var(--spacing-md) * 2);
            margin-left: calc(var(--spacing-md) * -1);
            margin-right: calc(var(--spacing-md) * -1);
            margin-top: calc(var(--spacing-md) * -1);
            margin-bottom: var(--spacing-xl);
            overflow: hidden;
            position: relative;
        }

        @media (min-width: 768px) {
            .hero-image {
                width: calc(100% + var(--spacing-xl) * 2);
                margin-left: calc(var(--spacing-xl) * -1);
                margin-right: calc(var(--spacing-xl) * -1);
                margin-top: calc(var(--spacing-2xl) * -1);
                border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            }
        }

        .hero-image img {
            width: 100%;
            height: auto;
            max-height: 400px;
            object-fit: cover;
            display: block;
        }

        .article-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }

        .article-image:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
        }

        .article-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform var(--transition-slow);
        }

        .article-image:hover img {
            transform: scale(1.02);
        }

        figcaption {
            font-size: 0.875rem;
            color: var(--color-text-muted);
            text-align: center;
            padding: var(--spacing-sm);
            font-style: italic;
            border-bottom: 2px solid var(--color-border-light);
        }

        /* Tables */
        table {
            width: 100%;
            margin: var(--spacing-xl) 0;
            border-collapse: collapse;
            font-size: 0.9375rem;
            box-shadow: var(--shadow-md);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        thead {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: white;
        }

        th {
            padding: var(--spacing-sm) var(--spacing-md);
            text-align: left;
            font-weight: 600;
            font-size: 0.875rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        td {
            padding: var(--spacing-sm) var(--spacing-md);
            border-bottom: 1px solid var(--color-border-light);
        }

        tbody tr {
            background: var(--color-surface);
            transition: background var(--transition-fast);
        }

        tbody tr:nth-child(even) {
            background: var(--color-bg-alt);
        }

        tbody tr:hover {
            background: color-mix(in srgb, var(--color-accent) 10%, var(--color-surface));
        }

        /* Code */
        code {
            font-family: 'SF Mono', Consolas, 'Liberation Mono', Menlo, monospace;
            font-size: 0.875em;
            background: var(--color-bg-alt);
            padding: 0.2em 0.4em;
            border-radius: var(--radius-sm);
            color: var(--color-primary-dark);
        }

        pre {
            margin: var(--spacing-xl) 0;
            padding: var(--spacing-md);
            background: var(--color-bg-alt);
            border-radius: var(--radius-md);
            overflow-x: auto;
            border: 1px solid var(--color-border);
        }

        pre code {
            background: none;
            padding: 0;
        }

        /* Navigation (Table of Contents) */
        nav[aria-label="Indice"] {
            background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-surface) 100%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: var(--spacing-lg);
            margin: var(--spacing-xl) 0;
            box-shadow: var(--shadow-sm);
        }

        nav[aria-label="Indice"]::before {
            content: 'Indice dei Contenuti';
            display: block;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.125rem;
            color: var(--color-primary);
            margin-bottom: var(--spacing-md);
            padding-bottom: var(--spacing-sm);
            border-bottom: 2px solid var(--color-accent);
        }

        nav[aria-label="Indice"] ol {
            margin-bottom: 0;
        }

        nav[aria-label="Indice"] a {
            text-decoration: none;
            color: var(--color-text);
            display: block;
            padding: var(--spacing-xs) 0;
            transition: color var(--transition-fast), transform var(--transition-fast);
        }

        nav[aria-label="Indice"] a:hover {
            color: var(--color-primary);
            transform: translateX(4px);
        }

        /* FAQ Section */
        section[aria-label="FAQ"] {
            margin-top: var(--spacing-2xl);
            padding-top: var(--spacing-xl);
            border-top: 2px solid var(--color-border);
        }

        details {
            margin-bottom: var(--spacing-md);
            background: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow var(--transition-base);
        }

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

        details[open] {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-lg);
        }

        summary {
            padding: var(--spacing-md);
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            background: var(--color-bg-alt);
            transition: background var(--transition-fast);
            list-style: none;
        }

        summary::-webkit-details-marker {
            display: none;
        }

        summary::before {
            content: '+';
            display: flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            background: var(--color-primary);
            color: white;
            border-radius: 50%;
            font-weight: 700;
            transition: transform var(--transition-base), background var(--transition-base);
        }

        details[open] summary::before {
            content: '-';
            background: var(--color-accent);
            transform: rotate(180deg);
        }

        summary:hover {
            background: color-mix(in srgb, var(--color-primary) 5%, var(--color-bg-alt));
        }

        summary:focus {
            outline: 2px solid var(--color-accent);
            outline-offset: -2px;
        }

        details > div {
            padding: var(--spacing-md);
            border-top: 1px solid var(--color-border-light);
        }

        /* Callout Boxes */
        aside[role="note"] {
            margin: var(--spacing-xl) 0;
            padding: var(--spacing-md);
            background: linear-gradient(135deg, color-mix(in srgb, var(--color-accent) 10%, var(--color-surface)) 0%, var(--color-surface) 100%);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--color-accent);
            box-shadow: var(--shadow-sm);
        }

        aside[role="note"] p {
            margin-bottom: 0;
        }

        /* Horizontal Rule */
        hr {
            border: none;
            height: 2px;
            background: linear-gradient(90deg, transparent 0%, var(--color-border) 20%, var(--color-accent) 50%, var(--color-border) 80%, transparent 100%);
            margin: var(--spacing-2xl) 0;
        }

        /* Selection */
        ::selection {
            background: var(--color-accent);
            color: var(--color-primary-dark);
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 10px;
            height: 10px;
        }

        ::-webkit-scrollbar-track {
            background: var(--color-bg-alt);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--color-primary);
            border-radius: 5px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-primary-dark);
        }

        /* Focus Visible for Accessibility */
        :focus-visible {
            outline: 3px solid var(--color-accent);
            outline-offset: 3px;
        }

        /* Skip Link */
        .skip-link {
            position: absolute;
            top: -100%;
            left: var(--spacing-md);
            padding: var(--spacing-sm) var(--spacing-md);
            background: var(--color-accent);
            color: var(--color-primary-dark);
            font-weight: 700;
            text-decoration: none;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            z-index: 1000;
            transition: top var(--transition-fast);
        }

        .skip-link:focus {
            top: 0;
        }

        /* Print Styles */
        @media print {
            body {
                background: white;
                color: black;
                font-size: 12pt;
            }

            main {
                box-shadow: none;
                max-width: none;
                padding: 0;
            }

            header, footer, nav {
                display: none;
            }

            h1, h2, h3 {
                page-break-after: avoid;
            }

            img, figure, table {
                page-break-inside: avoid;
            }

            a {
                color: black;
                text-decoration: underline;
            }

            a[href^="http"]::after {
                content: " (" attr(href) ")";
                font-size: 0.8em;
            }
        }

        /* Reduced Motion */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }

            html {
                scroll-behavior: auto;
            }
        }

/* =========================================
   UNIVERSAL DESKTOP & MOBILE MENU + LOGO
   ========================================= */

/* Header Base */
.site-header {
    background-color: var(--color-bg, #121212);
    border-bottom: 1px solid var(--color-border, #333333);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* Mobile defaults for navigation bar */
.top-navigation-bar {
    width: 100%;
    margin: 0 auto;
    padding: 15px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo Fixes */
.site-logo img {
    max-height: 75px; 
    width: auto !important; 
    display: block;
    transition: transform 0.2s ease;
}

.site-logo img:hover {
    transform: scale(1.02);
}

/* Desktop Menu */
.site-nav--desktop {
    display: none; 
}

/* Desktop Grid Layout: Logo left, Menu center */
@media (min-width: 1024px) {
    .top-navigation-bar {
        max-width: 100%;
        padding: 15px 40px; 
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
    }
    
    .site-logo {
        grid-column: 1;
        justify-self: start; 
        margin: 0;
    }

    .site-nav--desktop {
        display: block;
        grid-column: 2;
        justify-self: center; 
    }

    .mobile-controls {
        display: none; 
    }
    
    .menu-desktop {
        display: flex;
        gap: 30px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    
    .menu-desktop a {
        text-decoration: none;
        color: var(--color-text, #ffffff);
        font-family: var(--font-body, sans-serif);
        font-weight: 500;
        font-size: 16px;
        transition: color 0.2s ease;
    }
    
    .menu-desktop a:hover {
        color: var(--color-accent, #eab308);
    }
}

/* Mobile Burger Button */
.burger {
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 5px;
    z-index: 1000;
}

.burger span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--color-text, #ffffff);
    transition: transform 0.3s ease, opacity 0.3s ease;
    border-radius: 2px;
}

/* Burger Animation to X */
.burger.is-active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.burger.is-active span:nth-child(2) {
    opacity: 0;
}
.burger.is-active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Mobile Menu Slider */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%; 
    width: 85%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-bg, #121212);
    box-shadow: -5px 0 20px rgba(0,0,0,0.5);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    overflow-y: auto;
    padding: 60px 30px;
}

.mobile-menu.is-open {
    right: 0; 
}

.mobile-menu__close {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    font-size: 36px;
    line-height: 1;
    color: var(--color-text, #ffffff);
    cursor: pointer;
    transition: color 0.2s ease;
}

.mobile-menu__close:hover {
    color: var(--color-accent, #eab308);
}

.menu-mobile {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.menu-mobile a {
    text-decoration: none;
    color: var(--color-text, #ffffff);
    font-size: 20px;
    font-family: var(--font-display, sans-serif);
    font-weight: 600;
    display: block;
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.menu-mobile a:hover {
    color: var(--color-accent, #eab308);
    padding-left: 10px; 
}

/* Overlay */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(3px); 
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s;
    z-index: 998;
}

.mobile-menu-overlay.is-active {
    opacity: 1;
    visibility: visible;
}


/* =========================================
   4-COLUMN FOOTER (Scommesse Calcio Theme)
   ========================================= */
.site-footer-4col {
    background-color: var(--color-bg, #22c55e); /* Matching the green background */
    color: #f8fafc; /* Very light gray/white for contrast on green */
    padding: 60px 20px 30px;
    margin-top: 80px;
    font-family: var(--font-body, sans-serif);
    border-top: 3px solid var(--color-accent, #fbbf24); /* Gold/Yellow accent */
}

.footer-4col-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Legal Disclaimers Block */
.footer-disclaimers {
    font-size: 0.85rem;
    color: #e2e8f0;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-disclaimers p {
    margin-bottom: 0.8rem;
    line-height: 1.6;
    text-align: left;
}

.footer-disclaimers a {
    color: var(--color-accent, #fbbf24);
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.footer-disclaimers a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Grid Layout */
.footer-4col-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .footer-4col-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .footer-4col-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
    }
}

/* Titles */
.widget-title {
    color: var(--color-accent, #fbbf24); 
    font-family: var(--font-display, sans-serif); 
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.2rem;
    margin-top: 0;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Lists */
.widget-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.widget-list li {
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: #f8fafc;
    line-height: 1.5;
}

.widget-list a {
    color: #f8fafc;
    text-decoration: none;
    transition: color 0.2s ease;
}

.widget-list a:hover {
    color: var(--color-accent, #fbbf24);
}

/* Bullets */
.bullet-list li {
    position: relative;
    padding-left: 16px;
}

.bullet-list li::before {
    content: '•';
    color: var(--color-accent, #fbbf24); 
    position: absolute;
    left: 0;
    top: -2px;
    font-size: 1.5rem;
    line-height: 1;
}

.clean-list li {
    padding-left: 0;
    padding-bottom: 0.8rem;
}

.clean-list li::before {
    display: none;
}

.footer-4col-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 25px;
    text-align: center;
}

.footer-4col-bottom p {
    margin: 0;
    font-size: 0.85rem;
    color: #e2e8f0;
    text-align: center;
}

/* Back to Top Button */
.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: var(--color-accent, #fbbf24);
    color: #166534; /* Dark green for the arrow inside the button */
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: none;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 99;
}

.back-to-top-btn.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-btn:hover {
    background-color: #f59e0b; /* Darker gold/yellow */
    transform: translateY(-5px);
}