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

body {
    background: url("/img/sad.png") center/cover no-repeat fixed;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 20px;
}

section {
    background: rgba(255, 255, 255, 0.95);
    padding: 50px 40px;
    border-radius: 20px;
    box-shadow:
            0 20px 40px rgba(0, 0, 0, 0.3),
            0 0 0 1px rgba(255, 255, 255, 0.2);
    text-align: center;
    max-width: 600px;
    width: 100%;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    transform: translateY(0);
    transition: all 0.4s ease;
}

section:hover {
    transform: translateY(-10px);
    box-shadow:
            0 30px 60px rgba(0, 0, 0, 0.4),
            0 0 0 1px rgba(255, 255, 255, 0.3);
}

h1 {
    color: #2c3e50;
    font-size: 2.8rem;
    margin-bottom: 30px;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
    line-height: 1.3;
}

h2 {
    margin-top: 30px;
}

a {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 1.3rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

a:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(102, 126, 234, 0.6);
}

a:hover::before {
    left: 100%;
}

a:active {
    transform: translateY(-1px);
}

/* Animation d'entrée */
section {
    animation: fadeInUp 0.8s ease-out;
}

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