/* Reset et base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #06b6d4;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --background-light: #f8fafc;
    --background-white: #ffffff;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --gradient-secondary: linear-gradient(135deg, #64748b 0%, #94a3b8 100%);
}

/* Dark mode variables */
[data-theme="dark"] {
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --background-light: #0f172a;
    --background-white: #1e293b;
    --border-color: #334155;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-heavy: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar {
    background: rgba(30, 41, 59, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.logo-img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.nav-logo h2 {
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

/* Navigation améliorée */
.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover {
    color: var(--primary-color);
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: var(--background-light);
    transform: scale(1.1);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--background-light);
    position: relative;
    overflow: hidden;
    padding-top: 70px; /* Ajout du padding pour compenser la navbar */
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

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

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-medium);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

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

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.btn-accent {
    background: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
    animation: pulse 2s infinite;
}

.btn-accent:hover {
    background: #0891b2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
    animation: none;
}

.btn-accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-accent:hover::before {
    left: 100%;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.02); }
    100% { transform: scale(1); }
}

.calendar-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.calendar-link:hover {
    color: var(--accent-color);
}

.linkedin-link {
    color: #0077b5;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.linkedin-link:hover {
    color: #005885;
}

/* Floating Elements */
.hero-visual {
    position: relative;
    height: 400px;
}

.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}

.element {
    position: absolute;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-heavy);
    animation: float 6s ease-in-out infinite;
}

[data-theme="dark"] .element {
    background: var(--background-white);
}

.element i {
    font-size: 2rem;
    color: var(--primary-color);
}

.element-1 {
    top: 15%;
    left: 15%;
    animation-delay: 0s;
}

.element-2 {
    top: 65%;
    right: 15%;
    animation-delay: 2s;
}

.element-3 {
    bottom: 25%;
    left: 45%;
    animation-delay: 4s;
}

.element-4 {
    top: 8%;
    right: 8%;
    animation-delay: 1s;
    width: 60px;
    height: 60px;
}

.element-4 i {
    font-size: 1.5rem;
}

.element-5 {
    top: 45%;
    left: 8%;
    animation-delay: 3s;
    width: 70px;
    height: 70px;
}

.element-5 i {
    font-size: 1.8rem;
}

.element-6 {
    bottom: 35%;
    right: 25%;
    animation-delay: 5s;
    width: 65px;
    height: 65px;
}

.element-6 i {
    font-size: 1.6rem;
}

.element-7 {
    top: 75%;
    left: 25%;
    animation-delay: 1.5s;
    width: 55px;
    height: 55px;
}

.element-7 i {
    font-size: 1.3rem;
}

.element-8 {
    top: 12%;
    left: 55%;
    animation-delay: 2.5s;
    width: 75px;
    height: 75px;
}

.element-8 i {
    font-size: 1.9rem;
}

.element-9 {
    bottom: 8%;
    right: 8%;
    animation-delay: 3.5s;
    width: 50px;
    height: 50px;
}

.element-9 i {
    font-size: 1.2rem;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    25% { transform: translateY(-15px) rotate(2deg); }
    50% { transform: translateY(-25px) rotate(0deg); }
    75% { transform: translateY(-15px) rotate(-2deg); }
}

/* Sections générales */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Services Section */
.services {
    padding: 100px 0;
    background: var(--background-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .service-card {
    background: var(--background-white);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon i {
    font-size: 1.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.service-features i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* Testimonials Section */
.testimonials {
    padding: 100px 0;
    background: var(--background-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .testimonial-card {
    background: var(--background-white);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.testimonial-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stars {
    display: flex;
    gap: 0.25rem;
    color: #fbbf24;
    font-size: 1.2rem;
}

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

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-info h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

/* Projects Section */
.projects {
    padding: 100px 0;
    background: var(--background-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.project-card {
    background: white;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    overflow: hidden;
    min-width: 0;
}

[data-theme="dark"] .project-card {
    background: var(--background-white);
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.project-header {
    background: var(--gradient-primary);
    padding: 1.5rem;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.project-icon {
    font-size: 2rem;
    opacity: 0.9;
}

.project-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.project-details {
    display: grid;
    gap: 1.5rem;
}

.project-tech h4,
.project-results h4 {
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tech-tag {
    background: var(--primary-color);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 16px;
    font-size: 0.8rem;
    font-weight: 500;
}

.results-list {
    list-style: none;
}

.results-list li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.6rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.results-list i {
    color: var(--primary-color);
    font-size: 0.9rem;
}

/* About Section */
.about {
    padding: 100px 0;
    background: var(--background-light);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.about-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.feature i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.2rem;
}

.feature h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.feature p {
    color: var(--text-secondary);
}

.about-image {
    display: flex;
    justify-content: center;
}

.profile-image {
    width: 300px;
    height: 400px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: var(--shadow-medium);
    transition: transform 0.3s ease;
}

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

.image-placeholder {
    width: 300px;
    height: 400px;
    background: white;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-medium);
    border: 2px dashed var(--border-color);
}

.image-placeholder i {
    font-size: 4rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.image-placeholder p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: var(--background-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.2rem;
}

.contact-item h4 {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.contact-item p {
    color: var(--text-secondary);
}

.contact-item a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-item a:hover {
    color: var(--primary-color);
}

.contact-form {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .contact-form {
    background: var(--background-white);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    font-family: inherit;
    background: var(--background-white);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-section p,
.footer-section li {
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 20px;
    text-align: center;
    color: #94a3b8;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

/* Enhanced mobile design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-medium);
        padding: 2rem 0;
    }

    [data-theme="dark"] .nav-menu {
        background-color: var(--background-white);
    }

    .nav-menu.active {
        left: 0;
    }

    .hero {
        padding-top: 120px;
        min-height: 90vh;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
        padding: 2rem 20px;
    }

    .hero-title {
        font-size: 2.2rem;
        margin-bottom: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-direction: column;
        gap: 1rem;
        width: 100%;
        margin-bottom: 2rem;
    }

    .btn {
        width: 100%;
        text-align: center;
        padding: 15px 20px;
        font-size: 1rem;
    }

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

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

    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    /* Icônes visibles sur mobile avec taille réduite */
    .floating-elements {
        display: block;
        height: 200px;
        margin-top: 2rem;
    }

    .element {
        width: 50px;
        height: 50px;
    }

    .element i {
        font-size: 1.2rem;
    }

    .element-1 {
        top: 10%;
        left: 10%;
    }

    .element-2 {
        top: 60%;
        right: 10%;
    }

    .element-3 {
        bottom: 20%;
        left: 40%;
    }

    .element-4 {
        top: 5%;
        right: 5%;
        width: 40px;
        height: 40px;
    }

    .element-4 i {
        font-size: 1rem;
    }

    .element-5 {
        top: 40%;
        left: 5%;
        width: 45px;
        height: 45px;
    }

    .element-5 i {
        font-size: 1.3rem;
    }

    .element-6 {
        bottom: 30%;
        right: 20%;
        width: 42px;
        height: 42px;
    }

    .element-6 i {
        font-size: 1.1rem;
    }

    .element-7 {
        top: 70%;
        left: 20%;
        width: 38px;
        height: 38px;
    }

    .element-7 i {
        font-size: 0.9rem;
    }

    .element-8 {
        top: 8%;
        left: 50%;
        width: 48px;
        height: 48px;
    }

    .element-8 i {
        font-size: 1.4rem;
    }

    .element-9 {
        bottom: 5%;
        right: 5%;
        width: 35px;
        height: 35px;
    }

    .element-9 i {
        font-size: 0.8rem;
    }

    .profile-image {
        width: 250px;
        height: 350px;
    }

    .logo-img {
        height: 45px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-top: 100px;
        min-height: 85vh;
    }
    
    .hero-container {
        padding: 1.5rem 15px;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 2rem;
    }
    
    .hero-buttons {
        margin-bottom: 1.5rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .service-card,
    .testimonial-card,
    .project-card {
        margin: 0 5px;
        padding: 1rem;
    }
    
    .project-header {
        padding: 1rem;
    }
    
    .project-content {
        padding: 1rem;
    }
    
    .project-content h3 {
        font-size: 1.1rem;
    }
    
    .project-description {
        font-size: 0.85rem;
    }
    
    .tech-tag {
        padding: 0.25rem 0.5rem;
        font-size: 0.7rem;
    }
    
    .results-list li {
        font-size: 0.8rem;
    }
    
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 40px;
        height: 40px;
        font-size: 0.9rem;
    }
} 

/* Animations améliorées */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Classes d'animation */
.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
    animation: fadeInRight 0.6s ease-out;
}

/* Transitions améliorées pour les cartes */
.service-card,
.testimonial-card,
.project-card {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover,
.testimonial-card:hover,
.project-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-heavy);
}

/* Animation pour les éléments flottants améliorée */
@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
    }
    25% { 
        transform: translateY(-20px) rotate(3deg); 
    }
    50% { 
        transform: translateY(-30px) rotate(0deg); 
    }
    75% { 
        transform: translateY(-20px) rotate(-3deg); 
    }
} 

/* Spinner de chargement */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    margin-left: 10px;
}

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

/* Amélioration du bouton de retour en haut */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: var(--shadow-heavy);
} 

/* Bouton dans la section contact */
.contact-item .btn-accent {
    margin-top: 0.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    padding: 10px 16px;
}

.contact-item .btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}