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

:root {
    --primary-color: #2c5aa0;
    --secondary-color: #4a90e2;
    --accent-color: #00d4aa;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --navbar-height: 64px;
}

input[type="submit"] {
    all: unset;
  }

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    /* color: var(--text-dark); */
    /* background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)); */
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.header-logo {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.header-logo.hidden {
    opacity: 0;
    transform: scale(0.8);
}

.header-logo.visible {
    opacity: 1;
    transform: scale(1);
}

.site-title {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    margin-left: 1rem;
    font-weight: 300;
    letter-spacing: 1px;
}

.site-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.navbar-logo {
    height: 40px;
    position: absolute;
    margin-top: 10px;
    transition: opacity 0.3s ease, transform 0.3s ease;
    margin-right: auto;
}

.navbar-logo.hidden {
    opacity: 0;
    transform: scale(0.8);
}

.navbar-logo.visible {
    opacity: 1;
    transform: scale(1);
}

.nav-list {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-item {
    margin: 0 1rem;
}

.nav-link {
    display: block;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--text-dark);
    font-size: 1.2rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--accent-color);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

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

/* Hero Section */
.hero {
    min-height: 50vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

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

.hero-text h1 {
    font-size: 2.5rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    animation: slideInLeft 1s ease-out;
}

.hero-text p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    animation: slideInLeft 1s ease-out 0.2s both;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    animation: slideInLeft 1s ease-out 0.4s both;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

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

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: slideInRight 1s ease-out 0.3s both;
}

.feature-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    /* animation: float 6s ease-in-out infinite; */
}

.feature-card h3 {
    color: white;
    font-size: 1.5rem;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

/* Contenu principal */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
}

.section {
    padding: 2.5rem 0;
    background: white;
    /* margin-bottom: 0; */
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease forwards;
}

.section:nth-child(2) {
    animation-delay: 0.2s;
}

.section:nth-child(3) {
    animation-delay: 0.4s;
}

.section:nth-child(4) {
    animation-delay: 0.6s;
}

.section:nth-child(even) {
    background: #f7fafc;
}

.section .contact-card p {
    color: var(--white);
}

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

.section-header {
    display: block;
    text-align: center;
    margin-bottom: 0rem;
    padding-bottom: 0rem;
    border-bottom: none;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.section-icon {
    width: 60px;
    height: 60px;
    margin-right: 1rem;
    padding: 15px;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: var(--shadow);
}

/* .section h2 {
    font-size: 2rem;
    color: var(--white);
    font-weight: 600;
} */

/* .section p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--white);
    margin-bottom: 1.5rem;
} */

/* Cards Grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.card-title {
    display: flex;
    align-items: center;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 1rem 1rem 0;
    font-size: 1.5rem;
    color: white;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 400;
    margin-bottom: 1rem;
    color: #2d3748;
}

.card p {
    color: #718096;
    line-height: 1.6;
}

/* Video Container */
.video-container {
    background: var(--white);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin-top: 2rem;
}

.video-container:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.video-wrapper {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%;
    border-radius: 10px;
    overflow: hidden;
}

.video-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Process Section */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    margin: 0 auto 1.5rem;
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

/* Info Section */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    place-items: center;
}

.info-content .section-icon {
    margin: auto;
}

.info-content h3 {
    text-align: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #2d3748;
}

.info-list {
    list-style: none;
    margin: 1.5rem 0;
}

.info-list li {
    padding: 0.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.info-list li::before {
    content: '✓';
    color: #48bb78;
    font-weight: bold;
    margin-top: 0.1rem;
}

/* Highlights */
.highlight {
    background: linear-gradient(120deg, var(--accent-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
}

/* Call to action */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    margin: 3rem 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 10s linear infinite;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 212, 170, 0.3);
}

.submit-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    margin-top: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 212, 170, 0.3);
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 212, 170, 0.4);
}
.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 212, 170, 0.4);
}

/* Contact Section */
.contact-card {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 20px;
    padding: 3rem;
    color: white;
    text-align: center;
}

.contact-card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--white);
}

.contact-info {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.contact-item-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 2rem;
    margin-top: 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

/* Animations */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Interactions */
.interactive {
    transition: all 0.3s ease;
}

.interactive:hover {
    transform: scale(1.02);
}

/* Loading */
.loading {
    display: none;
    text-align: center;
    padding: 2rem;
}

.spinner {
    border: 4px solid var(--bg-light);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Mobile responsive */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.8rem;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .nav-list {
        flex-direction: column;
        align-items: center;
    }

    .nav-item {
        margin: 0;
    }

    .main-content {
        padding: 2rem 1rem;
    }

    .section-header {
        flex-direction: column;
        text-align: center;
    }

    .section-icon {
        margin-right: 0;
        margin-bottom: 1rem;
    }

    .video-container {
        padding: 1rem;
    }

    .cta-section {
        margin: 2rem 0;
        padding: 2rem 1rem;
    }

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

    .contact-info {
        flex-direction: column;
        align-items: center;
    }
}

/* ACCESSIBILITÉ : focus visible pour navigation clavier */
.keyboard-navigation a:focus, .keyboard-navigation button:focus, .keyboard-navigation input:focus, .keyboard-navigation select:focus, .keyboard-navigation textarea:focus {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px var(--bg-light);
    z-index: 2;
}