.split-flap {
    background-color: #2b2d2f;
    border: 2px solid #444;
    color: #f5f5f5;
    font-size: 1rem;
    letter-spacing: 0.08em;
    padding: 0.75rem 1rem;
    width: 100%;
    text-align: left;
    transition: all 0.2s ease-in-out;
    box-shadow: inset 0 -2px 0 #111;
}

select {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border-radius: 0;
}

input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    background-color: #2b2d2f;
    border: 2px solid #777;
    width: 1.25rem;
    height: 2rem;
    padding: 0.75rem 1rem; /* même padding que .split-flap */
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
}

input[type="checkbox"]:checked::after {
    content: "✓";
    color: white;
    font-weight: bold;
    font-size: 1rem;
}

.split-flap:focus {
    outline: none;
    border-color: #777;
}

.button-click {
    transform: translateY(1px);
    box-shadow: inset 0 2px 4px #111;
}

.form-group {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-group label {
    font-size: 1.1rem;
    color: #f5f5f5;
    width: 180px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    font-size: 1rem;
}

.form-group input[type="color"] {
    padding: 0;
    width: 3rem;
}