:root {
    /* Palette professionnelle basée sur les couleurs des images */
    --primary-blue: #2c3e7a;
    --primary-gold: #f4c430;
    --secondary-blue: #34495e;
    --accent-blue: #3498db;
    --light-blue: #ecf0f1;
    --dark-blue: #1e2a5a;
    
    /* Couleurs neutres professionnelles */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #6c757d;
    --dark-gray: #343a40;
    --border-color: #e9ecef;
    
    /* Ombres professionnelles */
    --shadow-light: 0 2px 10px rgba(44, 62, 122, 0.08);
    --shadow-medium: 0 4px 20px rgba(44, 62, 122, 0.12);
    --shadow-strong: 0 8px 30px rgba(44, 62, 122, 0.15);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--light-gray);
    font-weight: 400;
    position: relative;
    overflow-x: hidden;
}

/* Animation de fond avec icônes de recrutement flottantes */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.quantum-bubble {
    position: absolute;
    opacity: 0.6;
    animation: bubbleFloat 20s ease-in-out infinite;
    transition: all 0.3s ease;
    z-index: 1;
    border-radius: 50%;
    filter: blur(1px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

@keyframes bubbleFloat {
    0%, 100% { 
        transform: translateY(0px) translateX(0px) scale(1);
        opacity: 0.6;
    }
    25% { 
        transform: translateY(-60px) translateX(50px) scale(1.1);
        opacity: 0.8;
    }
    50% { 
        transform: translateY(-40px) translateX(-45px) scale(0.9);
        opacity: 0.7;
    }
    75% { 
        transform: translateY(-55px) translateX(30px) scale(1.05);
        opacity: 0.9;
    }
}

.quantum-impulse-btn {
    display: inline-block;
    padding: 0.85rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    background-color: var(--primary-blue);
    border: none;
    border-radius: 8px;
    text-decoration: none;
    box-shadow: var(--shadow-medium);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.quantum-impulse-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-gold), var(--accent-blue));
    transition: all 0.4s ease;
    z-index: -1;
}

.quantum-impulse-btn:hover::before {
    left: 0;
}

.quantum-impulse-btn:hover {
    color: var(--white);
    box-shadow: var(--shadow-strong);
    transform: translateY(-2px);
}

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

/* ESA Banner section simplifiée */
.quantum-dome {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.quantum-dome::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="rgba(244,196,48,0.1)"/><circle cx="80" cy="30" r="1.5" fill="rgba(244,196,48,0.1)"/></svg>');
}

.quantum-dome-content {
    position: relative;
    z-index: 2;
}

.quantum-atom {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 15px;
}

.quantum-atom .highlight {
    color: var(--primary-gold);
}

.quantum-atom .company-name {
    font-size: 1em;
    font-weight: 600;
    letter-spacing: 1px;
}

.tagline {
    font-size: 1.1rem;
    font-weight: 300;
    font-style: italic;
    opacity: 0.9;
}

/* Contenu principal ESA */
.quantum-content {
    padding: 60px 0;
}

.quantum-matrix {
    background: var(--white);
    border-radius: 12px;
    margin-bottom: 40px;
    box-shadow: var(--shadow-light);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.quantum-matrix:hover {
    box-shadow: var(--shadow-medium);
}

.quantum-matrix-crown {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    padding: 30px 40px;
    position: relative;
}

.quantum-matrix-flux {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 15px;
}

.quantum-matrix-flux i {
    color: var(--primary-gold);
    font-size: 1.5rem;
}

.quantum-matrix-whisper {
    font-size: 0.95rem;
    opacity: 0.8;
    font-weight: 300;
}

.quantum-matrix-nebula {
    padding: 40px;
}

/* Avantages ESA - Tuiles avec animation flip */
.advantages-lattice {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.spectrum-fragment {
    background: transparent;
    border: none;
    border-radius: 15px;
    position: relative;
    cursor: pointer;
    align-self: start;
    height: 180px;
    perspective: 1000px;
}

.fragment-nucleus {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.spectrum-fragment.flipped .fragment-nucleus {
    transform: rotateY(180deg);
}

/* Hover uniquement sur desktop */
@media (min-width: 769px) {
    .spectrum-fragment:hover .fragment-nucleus {
        transform: rotateY(180deg);
    }
}

.fragment-surface, .fragment-depth {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 0px;
    box-shadow: var(--shadow-light);
    border: 2px solid var(--border-color);
}

.fragment-surface {
    background: var(--white);
    transform: rotateY(0deg);
}

.fragment-depth {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    transform: rotateY(180deg);
}

.spectrum-fragment:hover .fragment-surface,
.spectrum-fragment.flipped .fragment-surface {
    border-color: var(--primary-gold);
}

.spectrum-fragment.flipped {
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.fragment-symbol {
    font-size: 3.2rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.fragment-reason {
    font-weight: 600;
    color: var(--primary-blue);
    font-size: 1.1rem;
    text-align: center;
    margin: 0;
}

.fragment-explanation {
    color: var(--white);
    line-height: 1.6;
    text-align: center;
    font-size: 0.95rem;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px;
}



/* Activités ESA - Grille moderne */
.activities-lattice {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.polymer-fragment {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    position: relative;
    transition: all 0.3s ease;
}

.polymer-fragment:hover {
    border-color: var(--primary-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.polymer-crown {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-gray);
}

.polymer-symbol {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-size: 1.2rem;
}

.polymer-beacon {
    color: var(--primary-blue);
    font-weight: 600;
    font-size: 1.1rem;
}

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

.polymer-list li {
    padding: 8px 0;
    color: var(--medium-gray);
    position: relative;
    padding-left: 20px;
}

.polymer-list li::before {
    content: '\f054';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    color: var(--primary-gold);
    font-size: 0.7rem;
}

/* Timeline ESA - Design vertical moderne */
.crystal-chamber {
    position: relative;
    margin-top: 50px;
    padding: 60px 0;
}

.crystal-vortex {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.crystal-vortex::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-blue), var(--primary-gold), var(--primary-blue));
    transform: translateX(-50%);
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.3);
}

.crystal-particle-fragment {
    position: relative;
    margin: 50px 0;
    width: 100%;
    display: flex;
    align-items: center;
    min-height: 180px;
}

.crystal-particle-fragment:nth-child(even) {
    flex-direction: row-reverse;
}

.vortex-digit {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(145deg, var(--primary-blue), #2980b9);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.4rem;
    z-index: 10;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
    border: 4px solid var(--white);
    transition: all 0.3s ease;
}

.vortex-digit:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 12px 35px rgba(52, 152, 219, 0.6);
}

.vortex-prism {
    width: calc(50% - 60px);
    background: linear-gradient(145deg, #ffffff, #f8f9fa);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 2px solid rgba(52, 152, 219, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
}

.vortex-prism:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-gold);
}

.vortex-prism::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 2px;
    background: var(--primary-gold);
    transform: translateY(-50%);
}

.crystal-particle-fragment:nth-child(odd) .vortex-prism::before {
    right: -20px;
}

.crystal-particle-fragment:nth-child(even) .vortex-prism::before {
    left: -20px;
}

.vortex-prism::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    transform: translateY(-50%);
    border: 8px solid transparent;
}

.crystal-particle-fragment:nth-child(odd) .vortex-prism::after {
    right: -16px;
    border-left-color: var(--primary-gold);
}

.crystal-particle-fragment:nth-child(even) .vortex-prism::after {
    left: -16px;
    border-right-color: var(--primary-gold);
}

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

.prism-symbol {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.vortex-prism:hover .prism-symbol {
    color: var(--primary-gold);
    transform: scale(1.1);
}

.prism-beacon {
    color: var(--primary-blue);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
}

.prism-echo {
    color: var(--medium-gray);
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: center;
    margin: 0;
}

/* Mobile Version */
.stellar-plastics-lattice {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    padding: 20px;
}

.stellar-crystal-prism,
.spectrum-fragment {
    /* Autoriser le défilement vertical natif même si des gestures sont présentes */
    touch-action: pan-y;
    -ms-touch-action: pan-y; /* IE/Edge legacy */
    background: transparent;
    border: none;
    border-radius: 15px;
    position: relative;
    cursor: pointer;
    height: 200px;
    perspective: 1000px;
}

.stellar-prism-nucleus {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.6s ease-in-out;
    transform-style: preserve-3d;
}

.stellar-crystal-prism.flipped .stellar-prism-nucleus {
    transform: rotateY(180deg);
}

.stellar-crystal-prism.flipped {
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
}

.stellar-prism-surface, .stellar-prism-depth {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 25px;
    box-shadow: var(--shadow-light);
    border: 2px solid var(--border-color);
}

.stellar-prism-surface {
    background: linear-gradient(145deg, #ffffff, #f8f9fa);
    border: 2px solid rgba(52, 152, 219, 0.1);
    transform: rotateY(0deg);
}

.stellar-prism-depth {
    background: linear-gradient(145deg, var(--primary-blue), #2980b9);
    color: var(--white);
    transform: rotateY(180deg);
    box-shadow: 0 12px 40px rgba(52, 152, 219, 0.3);
}

.stellar-crystal-prism:hover .stellar-prism-surface {
    border-color: var(--primary-gold);
}

.stellar-particle-digit {
    position: absolute;
    top: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
    background: linear-gradient(145deg, var(--primary-blue), #2980b9);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.stellar-prism-symbol {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.stellar-prism-beacon {
    color: var(--primary-blue);
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0;
    line-height: 1.3;
}

.stellar-prism-echo {
    color: var(--white);
    font-size: 1rem;
    line-height: 1.6;
    text-align: center;
    margin: 0;
}

/* Affichage conditionnel Desktop/Mobile */
.desktop-only {
    display: block;
}

.stellar-only {
    display: none;
}

/* Responsive Timeline Desktop */
@media (max-width: 768px) {
    .desktop-only {
        display: none !important;
    }
    
    .stellar-only {
        display: block !important;
    }
    
    .stellar-plastics-lattice {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        padding: 15px;
    }
    
    .stellar-crystal-prism {
        height: 180px;
    }
    
    .stellar-prism-symbol {
        font-size: 2rem;
        margin-bottom: 12px;
    }
    
    .stellar-prism-beacon {
        font-size: 1.1rem;
    }
    
    .stellar-prism-echo {
        font-size: 0.95rem;
    }
}

@media (max-width: 390px) {
    .stellar-plastics-lattice {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 10px;
    }
    
    .stellar-crystal-prism {
        height: 160px;
    }
    
    .stellar-prism-surface, .stellar-prism-depth {
        padding: 20px;
    }
    
    .stellar-particle-digit {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
        top: 10px;
        right: 10px;
    }
    
    .stellar-prism-symbol {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .stellar-prism-beacon {
        font-size: 1rem;
    }
    
    .stellar-prism-echo {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}




@media (max-width: 768px) {
    .advantages-lattice {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .spectrum-fragment {
        height: 160px;
        padding: 8px 10px 5px 8px;
    }
    
    .fragment-symbol {
        font-size: 2.3rem;
        margin-bottom: 8px;
        margin-top: 5px;
    }
    
    .fragment-reason {
        font-size: 1rem;
        margin-bottom: 6px;
    }
    
    .fragment-explanation {
        font-size: 0.8rem;
        line-height: 1.4;
    }
}

@media (max-width: 480px) {
    .crystal-vortex {
        gap: 15px;
    }
    
    .crystal-particle-fragment {
        padding: 20px;
        height: 160px;
    }
    
    .particle-crown {
        margin-bottom: 15px;
    }
    
    .particle-digit-modern {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
        margin-right: 12px;
    }
    
    .particle-symbol-modern {
        font-size: 1.3rem;
        margin-right: 8px;
    }
    
    .particle-beacon-modern {
        font-size: 1rem;
    }
    
    .particle-echo {
        font-size: 0.8rem;
    }
    
    .spectrum-fragment {
        height: 140px;

    }
    
    .fragment-symbol {
        font-size: 2rem;
        margin-bottom: 6px;
        margin-top: 3px;
    }
    
    .fragment-reason {
        font-size: 0.9rem;
        margin-bottom: 5px;
    }
    
    .prism-explanation {
        font-size: 0.75rem;
        line-height: 1.3;
    }
    
    .spectrum-separator {
        margin: 6px auto 8px auto;
    }
}

/* CTA Button */
.quantum-impulse-zone {
    text-align: center;
    margin: 50px 0;
}

/* Responsive général */
@media (max-width: 1024px) {
    .contenant {
        padding: 0 15px;
    }
    
    .section-content {
        padding: 30px;
    }
    
    .activities-lattice {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .quantum-atom {
        font-size: 2.8rem;
    }
    
    .company-name {
        font-size: 1.3rem;
    }
    
    .quantum-dome {
        padding: 40px 0;
    }
    
    .quantum-matrix-nebula {
        padding: 25px;
    }
    
    .quantum-matrix-crown {
        padding: 20px 25px;
    }
    
    .quantum-matrix-flux {
        font-size: 1.5rem;
        flex-direction: column;
        gap: 10px;
    }
    
    .quantum-matrix-flux i {
        font-size: 1.3rem;
    }
    

    
    .activities-lattice {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .polymer-prism {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 2.2rem;
    }
    
    .company-name {
        font-size: 1.1rem;
    }
    
    .quantum-dome {
        padding: 30px 0;
    }
    
    .quantum-block-content {
        padding: 20px;
    }
    
    .quantum-block-crown {
        padding: 18px 20px;
    }
    
    .quantum-block-beacon {
        font-size: 1.3rem;
    }

    
    .polymer-fragment {
        padding: 20px;
    }
    
    .quantum-content {
        padding: 40px 0;
    }
}

/* Animations subtiles */
.plasma {
    opacity: 0;
    transform: translateY(20px);
    animation: cosmic 0.8s ease forwards;
}

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

.quantum-matrix:nth-child(1) { animation-delay: 0.1s; }
.quantum-matrix:nth-child(2) { animation-delay: 0.2s; }
.quantum-matrix:nth-child(3) { animation-delay: 0.3s; }

/* Scrollbar personnalisée */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dark-blue);
}