/* --- Variables et Style de Base --- */
:root {
    --color-blue: #292A64;
    --color-red: #DB3837;
    --color-background: #f4f4f9;
    --color-text: #333;
    --color-white: #ffffff;
    --color-light-gray: #e9e9f3;
    --color-success: #28a745;
    --color-error: #dc3545;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Poppins', sans-serif; background-color: var(--color-background); color: var(--color-text); line-height: 1.6; }

/* --- Header --- */
.page-header { background-color: var(--color-white); padding: 15px 40px; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 2px 10px rgba(0,0,0,0.05); position: sticky; top: 0; z-index: 100; }
.logo { max-height: 40px; }
.back-button { text-decoration: none; color: var(--color-blue); font-weight: 600; padding: 8px 16px; border: 2px solid var(--color-light-gray); border-radius: 8px; transition: all 0.3s ease; }
.back-button:hover { background-color: var(--color-light-gray); border-color: var(--color-blue); }

/* --- Contenu Principal --- */
.main-content { max-width: 800px; margin: 50px auto; padding: 0 20px; }

.card { background: var(--color-white); padding: 35px; border-radius: 15px; box-shadow: 0 4px 15px rgba(0,0,0,0.08); margin-bottom: 50px; }
.card-title { font-size: 1.8rem; color: var(--color-blue); margin-bottom: 10px; text-align: center; font-weight: 700; }
.card-subtitle { font-size: 0.95rem; color: #666; text-align: center; margin-bottom: 25px; }

/* --- Conteneur et transition des formulaires --- */
.form-container {
    position: relative;
    /* La transition sur la hauteur est la clé de la correction */
    transition: height 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    overflow: hidden; 
}
.form-step {
    width: 100%;
    transition: opacity 0.5s ease-in-out, transform 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}
.form-step:not(.is-active) {
    opacity: 0;
    transform: translateY(-20px);
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none; /* Désactive les interactions quand masqué */
}

/* --- Formulaire --- */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 8px; color: #555; }
.form-group input, .form-group select {
    width: 100%;
    padding: 14px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    font-family: 'Poppins', sans-serif;
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(41, 42, 100, 0.15);
}
.form-group-checkbox { display: flex; align-items: center; margin-top: 25px; }
.form-group-checkbox input { width: auto; margin-right: 12px; transform: scale(1.2); }
.form-group-checkbox label { margin-bottom: 0; font-weight: 400; }
.form-group-checkbox a { color: var(--color-blue); text-decoration: none; font-weight: 600; }
.form-group-checkbox a:hover { text-decoration: underline; }

/* --- Bouton --- */
.submit-button {
    width: 100%;
    background-color: var(--color-red);
    color: var(--color-white);
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.submit-button:hover:not(:disabled) {
    background-color: #c0302f;
    transform: translateY(-2px);
}
.submit-button:disabled { background-color: #aaa; cursor: not-allowed; }
.submit-button .spinner { width: 20px; height: 20px; border: 3px solid rgba(255, 255, 255, 0.3); border-top-color: var(--color-white); border-radius: 50%; animation: spin 1s linear infinite; display: none; }
.submit-button.is-loading .spinner { display: block; }
.submit-button.is-loading span { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Messages de validation/erreur --- */
.form-message {
    padding: 12px 15px;
    margin-bottom: 20px;
    border-radius: 8px;
    font-size: 0.95rem;
    text-align: center;
    display: none; /* Masqué par défaut */
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.4s ease-out;
}
.form-message.is-visible { display: block; opacity: 1; transform: translateY(0); }
.form-message.success { background-color: #e9f6ec; color: var(--color-success); border: 1px solid var(--color-success); }
.form-message.error { background-color: #fdecea; color: var(--color-error); border: 1px solid var(--color-error); }
.form-message i { margin-right: 8px; }

/* --- Section 'Comment devenir membre' --- */
.steps-container { display: flex; gap: 30px; justify-content: space-between; }
.step-item { flex: 1; text-align: center; }
.step-icon { width: 80px; height: 80px; margin: 0 auto 20px; border-radius: 50%; background-color: var(--color-light-gray); display: flex; justify-content: center; align-items: center; color: var(--color-blue); font-size: 2.2rem; position: relative; }
.step-number { position: absolute; top: -10px; right: -10px; background-color: var(--color-red); color: white; width: 30px; height: 30px; border-radius: 50%; display: flex; justify-content: center; align-items: center; font-weight: 700; border: 2px solid white; font-size:1.5rem }
.step-item h4 { color: var(--color-blue); margin-bottom: 10px; font-size: 1.1rem; }
.step-item p { color: #666; font-size: 0.95rem; }

/* --- Tooltips --- */
.label-with-tooltip { display: flex; align-items: center; }
.tooltip-trigger { margin-left: 8px; color: var(--color-blue); cursor: pointer; font-size: 1.1rem; transition: color 0.3s ease; }
.tooltip-trigger:hover { color: var(--color-red); }
.tooltip-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.75); display: flex; justify-content: center; align-items: center; z-index: 1001; padding: 20px; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s ease; }
.tooltip-overlay.active { opacity: 1; visibility: visible; }
.tooltip-content { background-color: var(--color-white); border-radius: 10px; position: relative; box-shadow: 0 5px 20px rgba(0,0,0,0.2); transform: scale(0.9); transition: transform 0.3s ease; width: 100%; max-width: 500px; aspect-ratio: 1004 / 650; max-height: 90vh; }
.tooltip-overlay.active .tooltip-content { transform: scale(1); }
.tooltip-content img { width: 100%; height: 100%; display: block; object-fit: contain; border-radius: 10px; }
.tooltip-close { position: absolute; top: -15px; right: -15px; width: 40px; height: 40px; background-color: var(--color-red); color: var(--color-white); border-radius: 50%; display: flex; justify-content: center; align-items: center; font-size: 1.5rem; font-weight: bold; line-height: 1; cursor: pointer; border: 2px solid var(--color-white); box-shadow: 0 3px 8px rgba(0,0,0,0.3); transition: transform 0.2s ease, background-color 0.2s ease; }
.tooltip-close:hover { background-color: #c0302f; transform: scale(1.1) rotate(90deg); }

/* --- Animation & Responsive --- */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 768px) {
    .page-header { padding: 15px 20px; }
    .steps-container { flex-direction: column; gap: 40px; }
    .card { padding: 25px; }
    .card-title { font-size: 1.5rem; }
}