/* --- SIGN-UP PANEL CONTAINER --- */
.signup-panel {
    max-width: 650px;
    margin: 40px auto;
    padding: 40px;
    background-color: var(--bg-card-opaque);
    border: 1px solid var(--border-olive);
    border-radius: 12px;
    box-shadow: 0 4px 15px var(--shadow-card);
    box-sizing: border-box;
}

/* --- MESSAGES --- */
.form-message {
    background-color: var(--bg-input-dark);
    border: 1px solid var(--border-section);
    color: var(--text-main);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 25px;
    text-align: center;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 0.95rem;
}

/* --- GRID LAYOUT --- */
#signup_form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px 25px; 
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-submit-span {
    grid-column: 1 / -1; 
    margin-top: 10px;
}

/* --- TYPOGRAPHY & INPUTS --- */
.form-group label {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-main);
}

#signup_form input[type="email"],
#signup_form input[type="text"],
#signup_form input[type="password"],
#signup_form input[type="number"] {
    width: 100%;
    background-color: var(--bg-input-dark);
    border: 1px solid var(--border-section);
    color: var(--text-main);
    padding: 12px 15px;
    font-size: 1rem;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    border-radius: 6px;
    box-sizing: border-box;
    outline: none;
    transition: border-color 0.2s ease;
}

#signup_form input:focus {
    border-color: var(--color-link);
}

/* --- GENDER RADIO BUTTONS --- */
.radio-options {
    display: flex;
    align-items: center;
    gap: 20px;
    height: 100%; 
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: normal !important;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.radio-label:hover {
    color: var(--text-main);
}

/* --- THE BUTTON --- */
.btn-primary {
    background-color: var(--text-main); 
    color: var(--bg-body); 
    border: none;
    padding: 14px 20px;
    font-size: 1.05rem;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    font-weight: 700;
    border-radius: 6px;
    cursor: pointer;
    width: 100%;
    transition: transform 0.2s ease, opacity 0.2s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.btn-primary:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

/* --- MOBILE RESPONSIVENESS --- */
@media only screen and (max-width: 600px) {
    #signup_form {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .signup-panel {
        padding: 25px;
        margin: 20px 10px;
    }
}