.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;

    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);

    background-size: 60px 60px;

    -webkit-mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%);
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 80%);
}

.shape-4 {
    width: 300px;
    height: 300px;
    background: rgba(59, 130, 246, 0.1);
    top: 20%;
    right: 10%;
    animation-delay: -3s;
    filter: blur(60px);
}

.shape-5 {
    width: 250px;
    height: 250px;
    background: rgba(192, 132, 252, 0.1);
    bottom: 30%;
    left: 15%;
    animation-delay: -7s;
    filter: blur(50px);
}

:root {
    --bg-main: #070b14;
    --bg-card: rgba(20, 27, 45, 0.7);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-1: #3b82f6;
    --accent-2: #8b5cf6;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --card-border: rgba(255, 255, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
}

.reveal {
    opacity: 0;

    transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform, filter;
    filter: blur(8px);

}

.reveal.visible {
    opacity: 1;
    transform: translate(0, 0) scale(1);
    filter: blur(0);
}

.reveal-up {
    transform: translateY(60px);
}

.reveal-down {
    transform: translateY(-60px);
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

.reveal-scale {
    transform: scale(0.9);
}

.delay-100 {
    transition-delay: 0.2s;
}

.delay-200 {
    transition-delay: 0.2s;
}

.delay-300 {
    transition-delay: 0.3s;
}

.delay-400 {
    transition-delay: 0.4s;
}

.delay-500 {
    transition-delay: 0.5s;
}

/* Initial Load Animation */
@keyframes customFadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
        filter: blur(10px);
    }

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

.fade-in-initial {
    animation: customFadeInUp 1.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    opacity: 0;
}

.fade-delay-1 {
    animation-delay: 0.2s;
}

.fade-delay-2 {
    animation-delay: 0.4s;
}

/* Continuous Animations */
@keyframes float {
    0% {
        transform: translateY(0px) scale(1);
    }

    50% {
        transform: translateY(-20px) scale(1.05);
    }

    100% {
        transform: translateY(0px) scale(1);
    }
}

@keyframes gradient-x {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

h1,
h2,
h3 {
    font-weight: 800;
    color: #fff;
}

h2 {
    font-size: 2.8rem;
    margin-bottom: 2.5rem;
    text-align: center;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

a {
    text-decoration: none;
    color: var(--text-main);
    transition: all 0.3s ease;
}

/* Header / Nav */
header {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1) 0%, transparent 60%);
}

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.2rem;
    background: rgba(7, 11, 20, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    z-index: 1000;
    border-bottom: 1px solid var(--card-border);
    transition: all 0.3s ease;
}

nav a {
    font-weight: 600;
    font-size: 1.05rem;
    position: relative;
    padding: 0.5rem 0;
    color: var(--text-muted);
}

nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: linear-gradient(to right, var(--accent-1), var(--accent-2));
    transition: width 0.3s ease;
}

nav a:hover, nav a.active {
    color: #fff;
}

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

.hero-content {
    z-index: 10;
    max-width: 800px;
}

header h1 {
    font-size: 5rem;
    letter-spacing: -2px;
    margin-bottom: 0.5rem;
    background: linear-gradient(to bottom right, #ffffff, #93c5fd);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    font-size: 1.6rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    font-weight: 300;
}

.btn {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2), var(--accent-1));
    background-size: 200% auto;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    padding: 1rem 2.5rem;
    border-radius: 30px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2), 0 0 20px var(--accent-glow);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    animation: gradient-x 3s linear infinite;
}

.btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4), 0 0 30px var(--accent-glow);
    color: white;
}

/* Sections */
section {
    padding: 8rem 10%;
    position: relative;
    z-index: 2;
}

.about-text {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.25rem;
    color: var(--text-muted);
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 3.5rem;
    border-radius: 24px;
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.about-text::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.03), transparent);
    pointer-events: none;
}

.about-text strong {
    color: #fff;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
}

/* Grid & Cards */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    padding-top: 1rem;
}

.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

/* Effet bordure lumineuse au survol */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(255, 255, 255, 0.06), transparent 40%);
    opacity: 0;
    transition: opacity 0.5s;
    pointer-events: none;
    z-index: 1;
}

.card:hover {
    transform: translateY(-12px);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(59, 130, 246, 0.15);
    border-color: rgba(255, 255, 255, 0.15);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    z-index: 2;
}

.card h3::before {
    content: '✦';
    font-size: 1.2rem;
    color: var(--accent-1);
}

.card p {
    color: var(--text-muted);
    margin-bottom: 2rem;
    flex-grow: 1;
    font-size: 1.1rem;
    z-index: 2;
}

/* Skills */
.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    z-index: 2;
    position: relative;
}

.skill-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #e2e8f0;
    padding: 8px 18px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 400;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: default;
}

.skill-tag:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(96, 165, 250, 0.5);
    transform: translateY(-3px) scale(1.05);
    color: #fff;
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.2);
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1rem;
    margin-bottom: 1rem;
}

.tech-tag {
    font-size: 0.75rem;
    padding: 3px 8px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 4px;
    color: #93c5fd;
    font-weight: 600;
}


/* Footer */
footer {
    background: #04070c;
    padding: 5rem 2rem 3rem;
    text-align: center;
    border-top: 1px solid var(--card-border);
    position: relative;
    z-index: 2;
    overflow: hidden;
}

footer h3 {
    margin-bottom: 3rem;
    font-size: 2.2rem;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 900px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-card);
    padding: 1.2rem 2rem;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    backdrop-filter: blur(10px);
}

.contact-item:hover {
    transform: translateY(-8px);
    border-color: rgba(96, 165, 250, 0.5);
    color: #fff;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(59, 130, 246, 0.15);
}

.contact-icon {
    font-size: 1.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
}

/* Background animated elements */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.shape {
    position: absolute;
    filter: blur(90px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out alternate;
    border-radius: 50%;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: rgba(59, 130, 246, 0.15);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.shape-2 {
    width: 500px;
    height: 500px;
    background: rgba(139, 92, 246, 0.15);
    bottom: -150px;
    right: -150px;
    animation-delay: -5s;
}

.shape-3 {
    width: 400px;
    height: 400px;
    background: rgba(56, 189, 248, 0.1);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 3.5rem;
    }

    section {
        padding: 5rem 5%;
    }

    nav {
        padding: 1rem;
        gap: 1rem;
        flex-wrap: wrap;
    }

    header {
        padding-top: 8rem; /* Pousse le titre vers le bas pour ne pas être caché par le menu à 2 lignes */
    }

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

/* Boutons de projets */
.project-actions {
    display: flex;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1.5rem;
    position: relative;
    z-index: 10;
}

.btn-project {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    border: none;
    font-family: inherit;
    flex: 1;
}

.btn-project.primary {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.btn-project.primary:hover {
    background: rgba(59, 130, 246, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(59, 130, 246, 0.2);
    color: #fff;
}

.btn-project.secondary {
    background: rgba(255, 255, 255, 0.05);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-project.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    color: #fff;
}

/* Modale Projet */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    padding: 3rem;
    border-radius: 24px;
    max-width: 600px;
    width: 90%;
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5), 0 0 40px rgba(59, 130, 246, 0.2);
    position: relative;
    text-align: center;
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-close:hover {
    background: rgba(255, 59, 48, 0.8);
    transform: rotate(90deg);
}

.modal-title {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.modal-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.modal-placeholder {
    width: 100%;
    height: 250px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed rgba(255, 255, 255, 0.2);
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-muted);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.modal-placeholder:hover {
    border-color: var(--accent-1);
    background: rgba(59, 130, 246, 0.05);
}

/* Carousel */
.carousel-container {
    position: relative;
    width: 100%;
    height: 350px;
    border-radius: 16px;
    overflow: hidden;
    background: rgba(0, 0, 0, 0.3);
    margin-bottom: 2rem;
}

.carousel-slide {
    display: none;
    width: 100%;
    height: 100%;
    animation: fadeCarousel 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.carousel-slide.active {
    display: block;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    cursor: zoom-in;
    transition: transform 0.3s ease;
}

.carousel-slide img:hover {
    transform: scale(1.02);
}

@keyframes fadeCarousel {
    from { opacity: 0.3; transform: scale(0.98); }
    to { opacity: 1; transform: scale(1); }
}

.carousel-prev, .carousel-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    z-index: 10;
}

.carousel-prev:hover, .carousel-next:hover {
    background: var(--accent-1);
    border-color: var(--accent-1);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev { left: 15px; }
.carousel-next { right: 15px; }

.carousel-dots {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot:hover {
    background: rgba(255, 255, 255, 0.8);
}

.carousel-dot.active {
    background: var(--accent-1);
    transform: scale(1.3);
}

/* Lightbox / Plein écran */
.lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    z-index: 3000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
}

.lightbox-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.lightbox-overlay.active .lightbox-img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1.8rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3001;
}

.lightbox-close:hover {
    background: rgba(255, 59, 48, 0.8);
    transform: rotate(90deg);
}

.lightbox-prev, .lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3001;
    backdrop-filter: blur(5px);
}

.lightbox-prev {
    left: 2rem;
}

.lightbox-next {
    right: 2rem;
}

.lightbox-prev:hover, .lightbox-next:hover {
    background: rgba(59, 130, 246, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.language-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-bottom: 0.8rem;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
}

.language-name {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.language-level {
    display: flex;
    gap: 4px;
    font-size: 0.95rem;
    color: var(--accent-1);
    font-weight: 600;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 4rem auto 0;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 40px;
    height: 100%;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--accent-1), var(--accent-2), transparent);
}

.timeline-item {
    position: relative;
    padding-left: 100px;
    margin-bottom: 4rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-icon {
    position: absolute;
    left: 19px;
    top: 0;
    width: 44px;
    height: 44px;
    background: var(--bg-main);
    border: 2px solid var(--accent-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #fff;
    box-shadow: 0 0 15px var(--accent-glow);
    z-index: 2;
}

.timeline-content {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    padding: 2rem;
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 15px;
    left: -10px;
    border-width: 10px 10px 10px 0;
    border-style: solid;
    border-color: transparent var(--card-border) transparent transparent;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3), 0 0 20px var(--accent-glow);
    border-color: rgba(96, 165, 250, 0.4);
}

.timeline-date {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent-1);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.timeline-content h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.timeline-content h4 {
    font-size: 1.1rem;
    color: #cbd5e1;
    margin-bottom: 1rem;
    font-weight: 500;
}

.timeline-content p,
.timeline-content ul {
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        padding-left: 60px;
    }

    .timeline-icon {
        left: 0;
        width: 40px;
        height: 40px;
    }
}

/* Bouton Retour en haut */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3), 0 0 15px var(--accent-glow);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    justify-content: center;
    align-items: center;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4), 0 0 25px var(--accent-glow);
}