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

body {
    font-family: 'Inter', sans-serif;
    background: #0a0a0a;
    color: white;
    line-height: 1.6;
    overflow-x: hidden; /* ✅ Fix débordement */
}

header {
    padding: 25px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    background: #0a0a0a;
    position: sticky;
    top: 0;
    backdrop-filter: blur(15px);
    z-index: 100;
}

.logo {
    text-decoration: none;
    font-size: 32px;
    font-weight: 900;
    color: white;
    letter-spacing: 2px;
}

.hero {
    padding: 90px 20px 50px;
    text-align: center;
}

.badge {
    display: inline-block;
    padding: 10px 20px;
    border-radius: 50px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .08);
    margin-bottom: 25px;
    font-size: 14px;
    color: #d1d5db;
}

.hero h1 {
    font-size: 52px;
    margin-bottom: 15px;
}

.gradient {
    background: linear-gradient(90deg, #a855f7, #ec4899, #f97316);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    max-width: 600px;
    margin: auto;
    color: #9ca3af;
}

.container {
    max-width: 900px;
    margin: auto;
    padding: 30px 20px 80px;
    display: grid;
    gap: 25px;
    overflow: hidden; /* ✅ Fix débordement */
}

.card {
    background: #111;
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 22px;
    padding: 30px;
    transition: opacity 0.6s ease; /* ✅ Seulement opacity, plus de transform */
    opacity: 0; /* état initial géré en CSS */
    pointer-events: none; /* ✅ Cards non cliquables */
}

.card.visible {
    opacity: 1;
}

.card h2 {
    margin-bottom: 15px;
    font-size: 20px;
}

.card p {
    color: #bdbdbd;
    margin-bottom: 10px;
}

.back {
    text-align: center;
    margin-bottom: 80px;
}

.btn {
    display: inline-block;
    padding: 16px 30px;
    border-radius: 14px;
    background: linear-gradient(90deg, #9333ea, #ec4899);
    color: white;
    text-decoration: none;
    font-weight: 700;
    transition: .3s;
}

.btn:hover {
    transform: translateY(-3px);
}

footer {
    padding: 35px;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, .08);
}

.footer-logo {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 10px;
}

footer p {
    color: #777;
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 32px;
    }

    .card {
        padding: 20px;
    }

    .container {
        padding: 20px 15px 60px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .card {
        opacity: 1;
        transition: none;
    }
}