body {
    font-family: 'Arial', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background: linear-gradient(45deg, #ff9a9e, #fad0c4);
    color: #333;
    overflow: hidden;
}

/* PAGE D'ACCUEIL */
.login-container {
    text-align: center;
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
}

h1 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

input {
    padding: 0.7rem;
    font-size: 1.2rem;
    border: 2px solid #ddd;
    border-radius: 5px;
    width: 80%;
    text-align: center;
    margin-bottom: 1rem;
}

button {
    padding: 0.7rem 1.5rem;
    font-size: 1.2rem;
    color: #fff;
    background-color: #ff6b6b;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #ff4757;
}

.hidden {
    display: none;
    color: red;
    font-size: 1rem;
    margin-top: 10px;
}

/* PAGE ANNIVERSAIRE */
canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.card {
    text-align: center;
    background: #fff;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.2);
    animation: float 3s ease-in-out infinite;
    z-index: 10;
    position: relative;
}

.hidden {
    display: none;
}

/* Effet de popup */
@keyframes pop {
    0% { transform: scale(0); opacity: 0; }
    80% { transform: scale(1.2); opacity: 1; }
    100% { transform: scale(1); }
}

.revealed {
    display: block;
    animation: pop 0.5s ease-out;
}

#sevenCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1; /* Derrière les autres éléments */
}