@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=Onest:wght@400;500;600;700&display=swap');

/* 
   ==========================================================================
   CSS Variables & Design System (Healthify-inspired Theme)
   ========================================================================== 
*/
:root {
    /* Primary Colors - Premium Medical/Health Palette */
    --primary-color: #485b12; /* Darker Olive Green */
    --primary-dark: #3b4b0e;
    --primary-light: #e6e9db;
    
    /* Neutral Colors */
    --bg-color: #faf9f3; /* Cleaner Off-white background */
    --surface-color: #faf9f3; /* Off-white surface */
    --text-main: #4f4d4d; /* Warm grey text */
    --text-muted: #888888;
    --text-heading: #2d322c; /* Dark moss heading */
    
    /* Utility Colors */
    --border-color: #e2dfd3;
    --success: #1c84c6;
    --warning: #f8ac59;
    --danger: #ed5565;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 24px rgba(0,0,0,0.12);
    --shadow-floating: 0 20px 40px rgba(0,0,0,0.15);
    
    /* Typography */
    --font-family: 'Onest', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-heading: 'DM Serif Display', serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease-out;
}

/* 
   ==========================================================================
   Reset & Base Styles
   ========================================================================== 
*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-main);
    background-color: var(--surface-color);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

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

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

/* 
   ==========================================================================
   Typography Utilities
   ========================================================================== 
*/
.text-primary { color: var(--primary-color) !important; }
.text-white { color: #ffffff !important; }
.text-light { color: #f8f9fa !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-center { text-align: center; }
.opacity-70 { opacity: 0.7; }
.opacity-80 { opacity: 0.8; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mb-4 { margin-bottom: 2rem !important; }
.mt-3 { margin-top: 1.5rem !important; }

/* 
   ==========================================================================
   Buttons
   ========================================================================== 
*/
.btn {
    display: inline-block;
    padding: 15px 29px;
    font-weight: 700;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-align: center;
    border-radius: 3px 35px 3px 35px; /* Exact Leaf shape */
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: #ffffff;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--text-heading);
    border-color: var(--border-color);
}

.btn-outline:hover {
    border-color: var(--text-heading);
    background-color: var(--text-heading);
    color: #ffffff;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 
   ==========================================================================
   Navigation
   ========================================================================== 
*/
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    background-color: #ffffff;
    z-index: 1000;
    padding: 1.6rem 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--text-heading);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-main);
    font-weight: 500;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-fast);
}

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

.nav-btn {
    padding: 0.5rem 1.25rem;
}

.navbar-toggler {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-heading);
}

/* 
   ==========================================================================
   Hero Section
   ========================================================================== 
*/
.hero {
    position: relative;
    padding-bottom: var(--space-xl);
    background-color: var(--bg-color);
    overflow: hidden;
}

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

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: var(--space-sm);
}

.hero-text p {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    color: var(--text-main);
    max-width: 90%;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-image-wrapper {
    position: relative;
}

.hero-image {
    position: relative;
    z-index: 2;
    border-radius: 130px 130px 0 0; /* Arched image look */
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background-color: #fff;
    padding-top: 10px; /* Just a slight inset effect, or you can leave it off */
}

/* Reusable Arch utility */
.img-arch {
    border-radius: 130px 130px 0 0;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 500px;
    background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder.large {
    height: 600px;
}

.floating-card {
    position: absolute;
    z-index: 3;
    background: #ffffff;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-floating);
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: float 6s ease-in-out infinite;
}

.floating-card i {
    font-size: 2rem;
}

.floating-card h4 {
    margin-bottom: 0;
    font-size: 1.25rem;
}

.floating-card span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.experience-card {
    bottom: 10%;
    left: -10%;
}

.patients-card {
    top: 20%;
    right: -5%;
    animation-delay: 3s;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
    100% { transform: translateY(0px); }
}

.hero-shape {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    z-index: 1;
}

.hero-shape svg {
    display: block;
    width: 100%;
}

/* 
   ==========================================================================
   Sections
   ========================================================================== 
*/
.section {
    padding: var(--space-xl) 0;
}

.bg-light {
    background-color: var(--surface-color);
}

.section-title {
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--primary-color);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-md);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Service Cards */
.service-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: var(--space-md);
    border-radius: 16px; /* softer rounded corners for cards */
    transition: all var(--transition-normal);
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
    border-color: transparent;
}

.card-icon {
    width: 60px;
    height: 60px;
    background-color: var(--primary-light);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-fast);
}

.service-card:hover .card-icon {
    background-color: var(--primary-color);
    color: #ffffff;
}

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
    margin-top: 1rem;
}

.link-arrow i {
    transition: transform var(--transition-fast);
}

.link-arrow:hover i {
    transform: translateX(5px);
}

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

.about-image {
    border-radius: 130px 130px 0 0; /* Arched style */
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.feature-list {
    margin-top: 1.5rem;
}

.feature-list li {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    background-color: var(--text-heading);
    position: relative;
    overflow: hidden;
}

.cta-form {
    max-width: 500px;
    margin: 0 auto;
    background: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    text-align: left;
}

.form-group {
    margin-bottom: 1rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* 
   ==========================================================================
   Footer
   ========================================================================== 
*/
.footer {
    background-color: #3b1c32; /* Healthify Plum */
    color: #ffffff;
    padding: var(--space-lg) 0 var(--space-sm);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.footer h4 {
    color: #ffffff;
    margin-bottom: 1.5rem;
}

.footer ul li {
    margin-bottom: 0.75rem;
}

.footer ul li a {
    color: rgba(255,255,255,0.7);
}

.footer ul li a:hover {
    color: var(--primary-color);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: rgba(255,255,255,0.7);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255,255,255,0.5);
    font-size: 0.875rem;
}

/* 
   ==========================================================================
   Animations
   ========================================================================== 
*/
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.fade-in {
    opacity: 0;
    animation: fadeIn 1s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }

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

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

/* 
   ==========================================================================
   Responsive Design
   ========================================================================== 
*/
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-text p {
        max-width: 100%;
        margin: 0 auto var(--space-md);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-container {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        order: -1;
    }
    
    .floating-card {
        display: none; /* Hide floating cards on smaller screens */
    }
}

/* ── Pannello menu laterale (sotto navbar) ────────── */
.navbar-overlay {
    position: absolute;
    top: 100%;
    left: 0;
    width: 50%;
    max-width: 520px;
    z-index: 999;
    background: #c4892c;
    display: flex;
    flex-direction: column;
    padding: 2rem 2.5rem 3rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.navbar-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

@media (max-width: 768px) {
    .navbar-overlay {
        width: 100%;
        max-width: none;
    }
}

.overlay-list {
    list-style: none;
    width: 100%;
}

.overlay-list li {
    border-bottom: 1px solid rgba(255,255,255,0.25);
}

.overlay-list li:first-child {
    border-top: 1px solid rgba(255,255,255,0.25);
}

.overlay-list .nav-link {
    display: block;
    padding: 1rem 0;
    color: #fff !important;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2.5px;
}

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

@media (max-width: 768px) {
    .navbar-toggler {
        display: block;
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* 
   ==========================================================================
   Topic Grid (Aree di Intervento)
   ========================================================================== 
*/
.topic-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    text-align: center;
    margin-top: 3rem;
}
.topic-icon-wrapper {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2.5rem;
    transition: transform var(--transition-fast);
}
.topic-item {
    display: block;
}
.topic-item:hover .topic-icon-wrapper {
    transform: scale(1.1);
}
.topic-item h4 {
    font-family: var(--font-family);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-heading);
}

/* Specific Colors */
.bg-obesita { background-color: #475e18; }
.bg-allergie { background-color: #c6843b; }
.bg-sport { background-color: #a2a19c; }
.bg-gravidanza { background-color: #df8d71; }
.bg-pediatrica { background-color: #7f8b05; }
.bg-metaboliche { background-color: #7e0b38; }

/* 
   ==========================================================================
   Top Bar
   ========================================================================== 
*/
.top-bar {
    background-color: #7e0b38;
    color: #ffffff;
    padding: 8px 0;
    font-size: 0.85rem;
}
.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.top-bar-left, .top-bar-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.top-bar-item {
    color: #ffffff;
    text-decoration: none;
}
.top-bar-item i {
    margin-right: 5px;
    opacity: 0.8;
}
.top-bar-social {
    color: #ffffff;
    transition: opacity var(--transition-fast);
}
.top-bar-social:hover {
    opacity: 0.7;
}

/* 
   ==========================================================================
   New Navbar Layout
   ========================================================================== 
*/
.navbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.navbar-menu-btn {
    width: 36px;
    height: 36px;
    background-color: var(--primary-color);
    color: #ffffff;
    border-radius: 3px 35px 3px 35px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color var(--transition-fast);
}
.navbar-menu-btn:hover {
    background-color: var(--primary-dark);
}
.navbar-brand {
    font-size: 1.8rem;
    font-family: var(--font-heading);
    display: flex;
    align-items: center;
}
.navbar-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.search-icon {
    font-size: 1.2rem;
    color: var(--text-heading);
    cursor: pointer;
}

/*
   ==========================================================================
   Instagram Strip
   ==========================================================================
*/
.insta-strip-section {
    padding: var(--space-md) 0 0;
    background: var(--bg-color);
}

.insta-strip-header {
    text-align: center;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
    margin-bottom: 2rem;
}

.insta-handle {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-heading);
    margin: 0;
}

.insta-strip {
    display: flex;
    height: 280px;
    overflow: hidden;
}

.insta-strip-item {
    flex: 1;
    overflow: hidden;
    position: relative;
    display: block;
}

.insta-strip-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.45s ease;
}

.insta-strip-item:hover img {
    transform: scale(1.06);
}

.insta-strip-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.insta-strip-item:hover .insta-strip-overlay {
    background: rgba(0,0,0,0.28);
}

.insta-strip-overlay i {
    color: #fff;
    font-size: 1.8rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.insta-strip-item:hover .insta-strip-overlay i {
    opacity: 1;
}

@media (max-width: 640px) {
    .insta-strip {
        height: 200px;
    }
    .insta-strip-item:nth-child(n+5) {
        display: none;
    }
}

/*
   ==========================================================================
   Services Carousel
   ==========================================================================
*/
.services-carousel-section {
    padding: var(--space-lg) 0;
    background: var(--bg-color);
    overflow: hidden;
}

.section-label {
    text-transform: uppercase;
    letter-spacing: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.carousel-header {
    text-align: left;
    max-width: 1400px;
    margin: 0 auto var(--space-md);
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

.carousel-title {
    font-family: 'Cormorant Garamond', serif !important;
    font-size: 3.2rem;
    font-weight: 400;
    line-height: 1.12;
    color: var(--text-heading);
    margin-bottom: 0.5rem;
}

.carousel-viewport {
    overflow: hidden;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

.carousel-track {
    display: flex;
    gap: 1.5rem;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
}

.svc-card {
    flex: 0 0 calc((100% - 3rem) / 3);
    position: relative;
    height: 480px;
    overflow: hidden;
    border-radius: 20px;
    cursor: pointer;
    box-shadow: 0 8px 28px rgba(0,0,0,0.15);
}

.svc-card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
    display: block;
}

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

.svc-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(0,0,0,0.30) 0%,
        rgba(0,0,0,0.10) 40%,
        rgba(0,0,0,0.30) 100%
    );
}

/* top block: badge + title stacked */
.svc-card-top {
    position: absolute;
    top: 1.25rem;
    left: 1.25rem;
    right: 1.25rem;
    z-index: 2;
}

.svc-badge {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    margin-bottom: 0.75rem;
}

.svc-card-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.85rem;
    font-weight: 400;
    color: #fff;
    line-height: 1.15;
    margin: 0;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

/* CTA: incassato nell'angolo in basso a destra — overflow:hidden della card lo ritaglia */
.svc-card-btn {
    position: absolute;
    bottom: 0;
    right: 0;
    z-index: 2;
    background: #c4892c;
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.85rem 1.5rem 1rem 1.8rem;
    border-radius: 999px 0 0 0;
    white-space: nowrap;
    transition: background 0.2s ease;
    display: inline-block;
}

.svc-card-btn:hover {
    background: #a87023;
    color: #fff;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-top: 2rem;
    padding: 0 clamp(1.5rem, 4vw, 3rem);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    background: transparent;
    cursor: pointer;
    transition: background 0.25s ease, transform 0.25s ease;
    padding: 0;
}

.dot.active {
    background: var(--primary-color);
    transform: scale(1.25);
}

@media (max-width: 900px) {
    .svc-card {
        flex: 0 0 calc((100% - 1.5rem) / 2);
    }
    .carousel-title {
        font-size: 2.4rem;
    }
}

@media (max-width: 580px) {
    .svc-card {
        flex: 0 0 100%;
        height: 360px;
    }
    .carousel-title {
        font-size: 2rem;
    }
}

/*
   ==========================================================================
   Top Bar — responsive
   ==========================================================================
*/
@media (max-width: 768px) {
    .top-bar-left { display: none; }
    .top-bar-inner { justify-content: flex-end; }
}

/*
   ==========================================================================
   Overlay menu — active state
   ==========================================================================
*/
.overlay-list .nav-link.active {
    background: rgba(255,255,255,0.18);
    border-radius: 4px;
    padding-left: 0.75rem;
    margin-left: -0.75rem;
    width: calc(100% + 0.75rem);
}

/*
   ==========================================================================
   Form — miglioramenti focus
   ==========================================================================
*/
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    box-shadow: 0 0 0 3px rgba(72, 91, 18, 0.15);
}

/*
   ==========================================================================
   Scroll reveal
   ==========================================================================
*/
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal-d1 { transition-delay: 0.1s; }
.reveal-d2 { transition-delay: 0.22s; }
.reveal-d3 { transition-delay: 0.34s; }

/*
   ==========================================================================
   Scroll-to-top button
   ==========================================================================
*/
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    color: #fff;
    border: none;
    border-radius: 3px 16px 3px 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    z-index: 998;
    box-shadow: 0 4px 16px rgba(0,0,0,0.22);
}
.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}
.scroll-top-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/*
   ==========================================================================
   Footer — 4 colonne (homepage)
   ==========================================================================
*/
.footer-grid-4 {
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
}
@media (max-width: 1024px) {
    .footer-grid-4 { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 600px) {
    .footer-grid-4 { grid-template-columns: 1fr; }
}