h1 {
    color: #3b82f6;
    text-align: center;
    margin: 2.5rem 0 2rem;
    font-weight: 600;
    letter-spacing: 1.5px;
    font-size: 2rem;
}

form {
    max-width: 500px;
    margin: 0 auto 4rem;
    padding: 2.5rem;
    background: #1e293b;
    border-radius: 10px;
}

label {
    color: #60a5fa;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
    font-size: 1rem;
}

input[type="email"],
input[type="password"],
input[type="text"] {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 2px solid #3b82f6;
    border-radius: 8px;
    background: #0f172a;
    color: #cbd5e1;
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
    transition: border-color 0.25s ease;
}

input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

input:focus {
    border-color: #60a5fa;
    outline: none;
}

button.btn {
    width: 100%;
    padding: 1rem 0;
    background-color: #3b82f6;
    border: none;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

button.btn:hover {
    background-color: #2563eb;
}

/* Conteneur pour les toasts en bas à droite */
.flash-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
}

.alert-danger,
.alert-success {
    min-width: 250px;
    margin-top: 0.5rem;
    padding: 0.9rem 1.2rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    opacity: 1;
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.alert-danger {
    background: #7f1d1d;
    color: white;
}

.alert-success {
    background: #166534;
    color: white;
}