#slide1 {
    background: linear-gradient(135deg,
            rgba(62, 84, 172, 0.5) 0%,
            rgba(101, 93, 187, 0.4) 30%,
            rgba(79, 70, 229, 0.3) 60%,
            rgba(124, 58, 237, 0.4) 100%),
        url('../assets/nuages.jpeg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--light-color);
    position: relative;
    overflow: hidden;
}

/* Animation du titre principal */
#slide1 .slide-content {
    animation: slideInUp 1.2s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes slideInUp {
    0% {
        opacity: 0;
        transform: translateY(60px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes titleGlow {
    0% {
        opacity: 0;
        transform: translateY(30px);
        filter: blur(2px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
        filter: blur(0);
    }
}

@keyframes lineExpand {
    0% {
        width: 0%;
        opacity: 0;
    }
    100% {
        width: 60%;
        opacity: 1;
    }
}

@keyframes fadeInDelay {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

#slide1::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.12) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(187, 172, 226, 0.15) 0%, transparent 50%);
    z-index: 1;
}

#slide1 h3 {
    font-size: 1.8rem;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 400;
    margin-bottom: 1rem;
    letter-spacing: 1px;
    text-shadow: 
        0 0 10px rgba(0, 0, 0, 0.8),
        0 0 20px rgba(0, 0, 0, 0.6),
        0 2px 4px rgba(0, 0, 0, 0.9),
        0 4px 8px rgba(0, 0, 0, 0.5);
    animation: fadeInDelay 1.5s ease-out 0.3s both;
    position: relative;
}

#slide1 h2 {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff, #f0f9ff, #dbeafe, #bfdbfe);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
    line-height: 1.1;
    animation: titleGlow 2s ease-in-out 0.6s both;
    position: relative;
    text-shadow: none;
    filter: drop-shadow(0 0 15px rgba(0, 0, 0, 0.9)) 
            drop-shadow(0 0 25px rgba(0, 0, 0, 0.7))
            drop-shadow(0 4px 8px rgba(0, 0, 0, 0.8));
}

#slide1 h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
    border-radius: 2px;
    animation: lineExpand 1.5s ease-out 1.2s both;
}

#slide1 p {
    font-size: 1.4rem;
    margin-top: 2rem;
    color: rgba(255, 255, 255, 0.98);
    font-weight: 400;
    text-shadow: 
        0 0 10px rgba(0, 0, 0, 0.9),
        0 0 20px rgba(0, 0, 0, 0.7),
        0 2px 4px rgba(0, 0, 0, 0.8),
        0 4px 12px rgba(0, 0, 0, 0.6);
    animation: fadeInDelay 1.5s ease-out 0.9s both;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
    position: relative;
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 2rem;
    border-radius: 12px;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}