/* =========================
    FORMULAIRE INSCRIPTION / LOGIN
   ========================= */

body > main {
    flex: 1;
    margin-bottom: 3%;
}

form {
    width: 35%;
    margin-left: auto;
    margin-right: auto;
    margin-block: var(--margin-top);
    padding: 2rem;
    border: 1px solid var(--border);
    border-radius: 10px;
    background-color: var(--bg-surface);
}

.form-label {
    width: 100%;
}

h1 {
    text-align: center;
    color: var(--accent);
    margin: var(--margin-top);
}

form,
.invalid-feedback,
.form-text,
.form-control,
.form-label {
    text-align: center;
}

.form-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

form button {
    align-self: center;
}

/* Chaque div du formulaire */
form > div {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

/* Labels */
form label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
}

/* Inputs */
form input,
form textarea,
form select {
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 0.75rem;
    padding: 0.7rem 0.9rem;
    color: var(--text-main);
    font-size: 0.95rem;
    transition: all 0.2s ease;
    outline: none;
}

form input::placeholder {
    color: var(--text-dim);
}

/* Focus */
form input:focus,
form textarea:focus,
form select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    background: var(--bg-surface);
}

/* Champs invalides */
form .error input {
    border-color: var(--error-color);
}

form .error-message {
    font-size: 0.75rem;
    color: #fca5a5;
}

/* =========================
    LABEL FLOTTANT
   ========================= */

.form-group {
    position: relative;
    margin-bottom: 1.6rem;
    opacity: 0;
    transform: translateY(8px);
    animation: fieldFade 0.5s ease forwards;
}

.form-group .form-label {
    position: absolute;
    top: 1rem;
    color: var(--text-dim);
    font-size: 0.85rem;
    pointer-events: none;
    transition: all 0.2s ease;
    background: transparent;
}

.form-group .form-control {
    width: 100%;
    background: var(--bg-base);
    border: 1px solid var(--border-light);
    border-radius: 0.9rem;
    padding: 1.4rem 0.9rem 0.6rem;
    color: var(--text-main);
    font-size: 0.95rem;
}

.form-group:focus-within .form-label,
.form-group:has(.form-control:not(:placeholder-shown)) .form-label {
    top: 0.35rem;
    font-size: 0.7rem;
    color: var(--accent);
}

.form-group:nth-child(1) { animation-delay: 0.1s; }
.form-group:nth-child(2) { animation-delay: 0.2s; }
.form-group:nth-child(3) { animation-delay: 0.3s; }
.form-group:nth-child(4) { animation-delay: 0.4s; }

.is-invalid {
    border-color: var(--error-color);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.15);
}

.invalid-feedback {
    font-size: 0.75rem;
    color: #fca5a5;
    margin-top: 0.3rem;
}

/* =========================
    ANIMATIONS
   ========================= */

form {
    animation: formFade 1s ease forwards;
}

@keyframes formFade {
    from { opacity: 0; transform: translateY(15px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fieldFade {
    to { opacity: 1; transform: translateY(0); }
}

/* =========================
    BOUTON
   ========================= */

form button, .text-center a {
    margin-top: 1rem;
    width: 100%;
    display: block;
    text-align: center;
    background: linear-gradient(135deg, var(--accent), var(--accent-indigo));
    color: #fff;
    border: none;
    padding: 0.8rem 1rem;
    border-radius: 1rem;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
    box-sizing: border-box;
}

form button:hover, .text-center:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.6);
    filter: brightness(1.05);
}

form button:active, .text-center:active {
    transform: translateY(0);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.6);
}

.text-center:hover {
    box-shadow: none;
}

.text-center {
    width: 100%;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    margin: var(--margin-top) auto;
}

.text-center a {
    color: #fff;
    text-decoration: none;
}

#form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Bloc inscription */
.signup-prompt {
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid var(--accent);
    border-radius: 0.75rem;
    padding: 1rem;
    text-align: center;
}

.signup-prompt p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.signup-prompt a {
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    margin-top: 1rem;
}

/* Lien retour */
.text-center > a:last-child {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-muted);
    font-size: 0.85rem;
    padding: 0.6rem 1rem;
    border-radius: 1rem;
    text-align: center;
    transition: all 0.2s ease;
}

.text-center > a:last-child:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Notice RGPD */
.rgpd-notice {
    font-size: 0.75rem;
    color: var(--text-dim);
    font-style: italic;
    text-align: center;
    margin-top: 0.5rem;
}

/* =========================
    RESPONSIVE
   ========================= */

@media (max-width: 768px) {
    .text-center {
        padding: 1rem;
        gap: 0.75rem;
    }

    .signup-prompt {
        padding: 0.875rem;
    }

    .signup-prompt p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    form {
        gap: 1rem;
        width: 80%;
    }

    form button {
        font-size: 0.9rem;
        padding: 0.7rem;
    }

    .text-center {
        width: 90%;
        padding: 0.75rem;
    }

    .signup-prompt {
        border-radius: 0.5rem;
    }

    .text-center > a:last-child {
        font-size: 0.8rem;
        padding: 0.5rem 0.875rem;
    }
}