/* =========================================
   AkeruDev | Core Design System & Tokens
   ========================================= */

:root {
    /* Color Palette - Premium Dark Theme */
    --bg-dark: #0a0a0a;
    --bg-surface: #121212;
    --bg-glass: rgba(18, 18, 18, 0.7);
    --border-glass: rgba(255, 255, 255, 0.08);

    --text-primary: #f5f5f5;
    --text-secondary: #a3a3a3;
    --text-inverse: #000000;

    --accent-primary: #00bcd4;
    /* Softer, slightly deeper Cyan */
    --accent-hover: #00acc1;
    /* Darker hover for better contrast */

    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #00bcd4 0%, #007799 100%);

    /* Typography */
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing & Utilities */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    --border-radius: 12px;
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* =========================================
   Resets and Global Styles
   ========================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    /* Evita la selezione e la copia del testo */
    -webkit-user-select: none;
    /* Safari */
    -moz-user-select: none;
    /* Firefox */
    -ms-user-select: none;
    /* vecchi IE/Edge */
    user-select: none;
    /* Standard */
}

img,
svg {
    max-width: 100%;
    display: block;
    /* Impedisce di trascinare le immagini sulla scrivania per salvarle facilmente */
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
    pointer-events: none;
    /* Disabilita anche il menu tasto destro sull'immagine */
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

/* Typography Utilities */
h1,
h2,
h3,
h4,
.font-heading {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

/* Gradients */
.text-gradient {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center {
    text-align: center;
}

/* =========================================
   Layout Utilities
   ========================================= */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section-padding {
    padding: var(--spacing-xl) 0;
}

/* =========================================
   Buttons
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-smooth);
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: var(--bg-dark);
    /* Dark text for better contrast on cyan */
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 229, 255, 0.4);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--border-glass);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background-color: var(--border-glass);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.1);
}

.btn-primary-outline {
    background-color: transparent;
    border: 1px solid var(--border-glass);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-primary-outline:hover {
    background-color: var(--accent-primary);
    color: var(--bg-dark);
    /* Dark text for better contrast */
    border-color: var(--accent-primary);
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 229, 255, 0.4);
}


/* =========================================
   Navigation
   ========================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: background-color var(--transition-smooth), backdrop-filter var(--transition-smooth);
}

.navbar.scrolled {
    background-color: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-glass);
    padding: 0.75rem 0;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.03em;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.8rem;
    height: 1.8rem;
    background-color: var(--text-primary);
    color: var(--text-inverse);
    border-radius: 4px;
    font-weight: 800;
    font-size: 1.2rem;
}

.logo-icon-img {
    height: 2rem;
    width: auto;
    border-radius: 4px;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.social-icon-nav {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.social-icon-nav:hover {
    color: var(--bg-dark);
    background: var(--accent-primary);
    transform: translateY(-4px) scale(1.1);
    box-shadow: 0 8px 20px rgba(0, 229, 255, 0.4);
    border-color: var(--accent-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-toggle .bar {
    width: 25px;
    height: 2px;
    background-color: var(--text-primary);
    transition: all var(--transition-fast);
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

/* Soft background glow */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 60%);
    z-index: -1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.hero-logo-large {
    font-size: 15rem;
    font-weight: 800;
    line-height: 1;
    color: var(--bg-surface);
    text-shadow: 2px 2px 40px rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 2;
    user-select: none;
}

.hero-logo-large-img {
    height: 10rem;
    width: auto;
    position: relative;
    z-index: 2;
    user-select: none;
    border-radius: 10px;
}

.hero-img-floating {
    animation: float 6s ease-in-out infinite;
}

.hero-visual img {
    animation: float 6s ease-in-out infinite;
    transform-origin: center;
}

@keyframes float {
    0% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }

    100% {
        transform: translateY(0);
    }
}

/* Abstract subtle geometry behind the big 'A' */
.abstract-shape {
    position: absolute;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: spin 30s linear infinite;
}

.shape-1 {
    width: 300px;
    height: 300px;
    border-top-color: rgba(255, 255, 255, 0.1);
}

.shape-2 {
    width: 400px;
    height: 400px;
    animation-direction: reverse;
    animation-duration: 40s;
    border-bottom-color: rgba(255, 255, 255, 0.08);
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

/* =========================================
   Animations
   ========================================= */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
    /* Ritardo a cascata basato sulla variabile --delay (Stagger) */
    transition-delay: calc(var(--delay, 0) * 150ms);
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in-up {
    animation: fadeInUp 1s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
    opacity: 0;
    transform: translateY(30px);
}

.fade-in-right {
    animation: fadeInRight 1s cubic-bezier(0.25, 0.8, 0.25, 1) 0.3s forwards;
    opacity: 0;
    transform: translateX(30px);
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Base Styles for Glass Panels */
.glass-panel {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    /* Increased spatiality */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
    /* Deep ambient shadow */
}

/* Footer layout */
.footer {
    padding: var(--spacing-md) 0;
    text-align: center;
    border-top: 1px solid var(--border-glass);
    color: var(--text-secondary);
}

.footer-socials {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-icon {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: floatingIcon 4s ease-in-out infinite;
}

.social-icon:nth-child(2) {
    animation-delay: 0.5s;
}

.social-icon:nth-child(3) {
    animation-delay: 1s;
}

.social-icon:hover {
    color: var(--bg-dark);
    background: var(--accent-primary);
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 15px 30px rgba(0, 229, 255, 0.4);
    border-color: var(--accent-primary);
    animation-play-state: paused;
}

@keyframes floatingIcon {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-6px);
    }

    100% {
        transform: translateY(0px);
    }
}

/* =========================================
   Media Queries
   ========================================= */
@media (max-width: 991px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-description {
        margin: 0 auto var(--spacing-md);
    }

    .hero-actions {
        justify-content: center;
        flex-wrap: wrap;
    }

    .hero-visual {
        margin-top: var(--spacing-md);
        height: auto;
        padding: var(--spacing-lg) 0;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    .nav-list {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--bg-dark);
        flex-direction: column;
        justify-content: center;
        transition: 0.3s ease;
        z-index: 1000;
        gap: 2rem;
    }

    .nav-list.active {
        right: 0;
    }

    .nav-links li {
        opacity: 0;
    }

    .nav-list.active li {
        animation: navLinkFade 0.5s ease forwards 0.3s;
    }

    .mobile-menu-toggle.active .bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .mobile-menu-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active .bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}

@keyframes navLinkFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   Component Styles: Sections & Forms
   ========================================= */

/* Common Section Styles */
.bg-surface {
    background-color: var(--bg-surface);
}

.section-header {
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    transition: transform var(--transition-smooth), border-color var(--transition-smooth);
    display: flex;
    flex-direction: column;
    padding: 0;
    overflow: hidden;
}

.service-image-container {
    width: 100%;
    height: 350px;
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--border-glass);
}

.service-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card:hover .service-image {
    transform: scale(1.15);
}

.service-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.service-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 12px 40px rgba(0, 229, 255, 0.15);
    /* Soft cyan glow */
}

.service-icon {
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-highlights {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.about-highlights span {
    color: var(--accent-primary);
    margin-right: 0.5rem;
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
}

.stat-box {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 4rem;
    font-weight: 800;
    font-family: var(--font-heading);
    background: var(--gradient-brand);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Contact Section Grid */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: stretch;
}

.contact-info {
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.info-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.info-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.info-divider {
    height: 1px;
    width: 60px;
    background: var(--accent-primary);
    margin: 1.5rem 0;
}

.info-email {
    font-size: 1.25rem;
    font-weight: 600;
    display: inline-block;
    margin-top: 0.5rem;
}

#contactEmailText {
    /* Sovrascrive il blocco del body per permettere di copiare la mail */
    -webkit-user-select: all;
    -moz-user-select: all;
    -ms-user-select: all;
    user-select: all;
}

/* Contact Form */
.form-wrapper {
    width: 100%;
}

.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.contact-form input:not([type="checkbox"]),
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    background-color: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.contact-form input:not([type="checkbox"]):focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

/* Checkbox Layout */
.checkbox-group {
    margin-bottom: 2rem;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.checkbox-container input[type="checkbox"] {
    margin-top: 3px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.w-100 {
    width: 100%;
}

/* Form Validation Styles */
.error-msg {
    color: #ff5e5e;
    font-size: 0.8rem;
    display: none;
    margin-top: 0.25rem;
}

.form-group.error input,
.form-group.error textarea {
    border-color: #ff5e5e;
}

.form-group.error .error-msg {
    display: block;
    animation: fadeIn 0.3s ease;
}

.form-success {
    margin-top: 1rem;
    padding: 1rem;
    background-color: rgba(46, 204, 113, 0.1);
    border: 1px solid #2ecc71;
    color: #2ecc71;
    border-radius: var(--border-radius);
    text-align: center;
}

.hidden {
    display: none;
}

/* Scroll Animations Base */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--transition-smooth), transform 0.8s var(--transition-smooth);
}

/* Apply delay based on style prop */
.animate-on-scroll[style*="--delay: 1"] {
    transition-delay: 0.1s;
}

.animate-on-scroll[style*="--delay: 2"] {
    transition-delay: 0.2s;
}

.animate-on-scroll[style*="--delay: 3"] {
    transition-delay: 0.3s;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .about-container {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   Cookie Consent Banner
   ========================================= */
.cookie-banner {
    position: fixed;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%) translateY(150%);
    width: 90%;
    max-width: 600px;
    background: var(--bg-surface);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    z-index: 2000;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.8);
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.cookie-banner.show {
    transform: translateX(-50%) translateY(0);
}

.cookie-banner h4 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.cookie-banner p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.cookie-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: flex-end;
}

.btn-sm {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
}

/* Cookie Preferences Modal */
.cookie-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 15, 25, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 3000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s var(--transition-smooth);
}

.cookie-modal.show {
    opacity: 1;
    visibility: visible;
}

.cookie-modal-content {
    width: 90%;
    max-width: 500px;
    background: var(--bg-surface);
    transform: translateY(20px);
    transition: transform 0.4s var(--transition-smooth);
    padding: 2rem;
}

.cookie-modal.show .cookie-modal-content {
    transform: translateY(0);
}

.cookie-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 1rem;
}

.cookie-modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.3rem;
}

.close-modal {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.8rem;
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

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

.cookie-modal-body p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.cookie-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.cookie-option:last-of-type {
    border-bottom: none;
    margin-bottom: 1.5rem;
}

.cookie-option-info {
    flex: 1;
    padding-right: 1rem;
}

.cookie-option-info strong {
    display: block;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    font-size: 1rem;
}

.cookie-option-info span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.1);
    transition: .4s;
    border-radius: 24px;
}

.toggle-switch .slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

.toggle-switch input:checked+.slider {
    background-color: var(--accent-primary);
}

.toggle-switch input:disabled+.slider {
    background-color: var(--accent-primary);
    opacity: 0.5;
    cursor: not-allowed;
}

.toggle-switch input:checked+.slider:before {
    transform: translateX(26px);
}

/* =========================================
   Scroll To Top Button
   ========================================= */
.scroll-to-top {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 50px;
    height: 50px;
    background-color: var(--accent-primary);
    color: var(--text-inverse);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.15);
}

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

.scroll-to-top:hover {
    background-color: var(--accent-hover);
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.25);
    color: var(--text-inverse);
}